Note: Descriptions are shown in the official language in which they were submitted.
106;~059
BACKGROUND OF THE INVENTION
A device of this type is known, for example, in the form of a head
box in a paper machine. The material is placed on the wire at the upper
crown of the breast roll, in a flood which extends over the width of the web.
: Because of the considerable operating speed of modern paper machines, and the
small concentration of the material, which contains only about 0.5% fiber
proportion, the fibers are fed in a relatively very large quantity of liquid,
a considerable quantity of liquid must be placed on the wire per unit of time,
so that the flood reaches a height of 20 to 30 mm. In order to now limit the
flood, in its height, uniformly, a lip is provided in a known embodiment,
above the upper crown of the breat roll, where the lip extends over the
width of the web and consists of a vertically arranged metal strip. The
height of the lip above the crown of the breast roll i6 adjustable. Further-
more, the proflle of the gap between lip and breast roll can be changed, which
is necessary in order to obtain a uniform area/weight ratio of the paper which
.~ : :
is produced across large operatlng widths of up to 10 m. In the known embodi-
ment, adjustment is carried out through a large number of adjustment rods ~ ;
which are distributed over the width of the web and which engage at the back
~ of the metal strip forming the lip and bend it slightly on edge with differ-
,~ 20 ential feed, so that the gap or opening between the lip and the breast roll
has a differential width. The change in position of the adjustment rods in
;! their longitudinal direction is carried out by means of individual threaded
y spindles which are accessible from an operating bridge which extends across
;~, the web and which are activated manually by the operating personnel. The
adjusted position of the individual adjustment rods and thus the position of
the lip over the breast roll can be read off on a suitable indicator device.
, The adjustment of the lip, which is carried out manually, is very
time-consuming and also requires especially trained operating personnel.
SUMMARY OF THE INVENTION
Starting with this problem, the objective of this invention is to
I so configure a device of the initially cited type, which is thus also suit-
'~ able for applications other than the head box named as the example, that rapid
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,~ adaptation of the device acting on the web to the measured values obtained
on the web is possible. ~ ~.
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The invention provides in apparatus for acting on web-shaped mater- :
, ial wherein a plurality of adjustment members are arranged in a row across ;~
the width of said web, the improvement comprising: a fixed guide rail extend- ~
ing transversely across said web; a plurality of carriages independently mov- ~: :
' able along said guide rail, there being a carriage for each of said adjustment .
members and coupled thereto whereby movement of a carriage along said rail
effects a displacement of its associated adjustment member; a common drive
'~ 10 means for at least two of said carriages with which said carriages may be
t~, selectively coupled; detection means for detecting the position of each
:,~ carriage at a predetermined time; and a control device for receiving data ~-~
~ from said detection means and data indicative of measured values at trans-
,5',' versely spaced points of said web at said predetermined time and data indi-
,~ cative of the desired position of a carriage, sald control device producing
output signals for coupling or uncoupling said carriages and said drive means.
.~ From another aspect, the invention provides in apparatus for acting
~: .
s. on web-shaped material wherein a plurality of adjustment members are arranged
in a row across the width of the web and which engage means acting on said
;!~ 20 web for differentially altering the effect of said last-named means across
the width of said web, the improvement comprising: a rotatable shaft extend-
-~ ing transversely across said web; a plurality of control devices rotatable on
;~:. ..
; said shaft, there being a control device for each of said adjustment members,
each control device having a control means; each adjustment member having
means operable by said control means whereby rotation of a control member will
- effect movement of its associated adjustment member; detection means for detect-
. . .
ing the position of rotation of each control member at a predetermined time;
means for selectively coupling said control members to said shaft for rotation
therewith; and a control device for receiving data from said detection means
. 30 and data indicative of measured values at transversely spaced points of said
web at said predetermined time and data indicative of the desired position of
a carriage, said control device producing output signals for coupling or
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~; uncoupling said control devices and said shaft.
From another aspect, the invention provides in apparatus for acting
~,~ on web-shaped material wherein a plurality of adjustment members are arranged
~! in a row across the width of the web and which engage means acting on said
web for diferentially altering the effect of said last-named means across `
the width of said web, the improvement comprising: a rotatable shaft extend-
ing transversely across said web; a plurality of control devices rotatable
on said shaft, there being a control device for each of said adjustment
members; each control device being rotatable on said shaft and having a
peripheral portion provided with gear teeth; a pinion meshing with said gear .~:-
teeth, said pinion being arranged to effect operation of its associated adjust- ; :
ment member; and means for selectively drivingly coupling said control device
to ~aid shaft.
From another aspect, the invention provides in apparatu~ for acting
on web-shaped material wherein a plurality of adjustment members are arranged
in a row across the width of the web and which engage means acting on said
web for differentially altering the effect of said last-named means across
the width of said web, the improvement comprising: a rotatable shaft extend-
ing transversely across said web; a plurality of control devices rotatable
on said shaft, there being a control device for each of said adjustment
members, each control device having a control means; each control device
~ being rotatable on said shaft; and a link pivoted to said control device to
effect operation of its associated adjustment member; and means for selective-
ly drivingly coupling said control device to said shaft.
From another aspect, the invention provides in a paper machine
having a head box arranged over and across a breast roll, a lip member differ-
: ent portions of which are independently adjustable over the breast roll and
vertical adjustment rods connected to said different portions, the improvement
comprising: fixed support means extending across the head box; a control
member on said support means for each adjustment rod; a common drive means for
a plurality of said control members; means for selectively coupling said con-
trol members to said drive means; and a control device for receiving data
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: 106ZOS9 ' '
from said detection means and data indicative of measured values at trans- :
versely spaced points of said web at said predetermined time and data indi-
cative of the desired position of a carriage, said control device producing
output signals for coupling or uncoupling said control members and said
drive means.
The embodiments herein disclosed include the following characteris- ~ -
tics: ~ -
a) an arrangement of separately movable control members is provided,
each associated with an adjustment member;
b) each control member is mechanically so movably coupled with its
associated adjustment member, that movement of the control member results in
a displacement of the adjustment member in its adjustment direction;
~ c) a common drive, with which the individual control members can
v be controllably coupled, is provided for at least some of the control members;
d) a detection device i~ provided for the position, at a particular
pol~t in time, of each of the control members;
j e) a control device i8 provided, into which the data of the detec- ,`
tion device, possibly a set of data corresponding to the measured values
prevailing from the individual points of the web at a particular point in time,
as well as data corresponding to the nominal position of the individual con-
trol members, can be fed, and which provides signals for the coupling or
decoupling of the individual control members and of the drive.
A significant characteristic is the provision of the common drive
for the control members. In this manner, it is attained that a large number -
of drives, with respect to starting and stopping need not be controlled, but
that only the coupling and decoupling of the control members with the single
drive which is present must be regulated, which can be accomplished in a con-
siderably simpler manner. As will still be described, the common drive can
be realized by a rotating shaft or a thrust rod which passes along all of the
control members.
In addition to the simplification, the common drive also makes
; possible a considerably faster adaptation cycle than would be possible with
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~ : 106'~05~
the manual individual adaptation of the adjustment members. This is caused
by the fact that the control members need not be moved sequentially, but can
be moved essentially simultaneously. When they have attained their amount of
movement, they are decoupled from the common drive.
The adaptation cycle can also be repeated in rapid succession, thus
obtaining a quasi continuous monitoring of the adjustment members.
The "detection device" has two versions that are differentiated in
the way the actual values are obtained for the adjustment of the control mem-
.,
' bers, which are then compared with the predetermined values, in order to
; 10 obtain the required amounts of motion for the individual control members.
In both versions, the guide magnitude is a measuring quantity taken
~ from the web. At a particular point in time, a totality of measured values
,~ i8 available from a corresponding measuring device, representing a profile of
~,"
the web in its cross direction. It can be, for example, a thickness profile,
a profile of area weight, a profile of moisture content, or the like. The
measured values, which thus represent the condition of the web at a certain
moment and which can be obtained directly on the moving web or which can be
obtained from specimens removed from the web, are input into the control
device and are there compared with predetermined nominal values.
From this point on, the two versions differ.
In the first version, the prevailing positions of the individual
control members are included and are also processed in the control device, in
addition to the measured values obtained on the web and the nominal values.
This can be accomplished in such a manner that the prevailing condition of the
control members is continuously monitored or that the data of the last
positioning of the control members is stored and are reused in the new posi-
tioning. From the values for the prevailing positions of the control members,
the measured values of the web, and the nominal values, which are thus obtain-
ed separately in this manner, the individual motion of the control members is
initiated by the control device. In this case, the "detection device" is the
device for the separate determination of the present position of the individual
control members.
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~ ~ 106Z059 ~ ~
In the second version, there is no separate detection of the present
~, position of the control members, but the values measured on the web are
directly used as the measure for the starting positions of the control members.
In this case, the "detection device" is thus the measuring device which deter- `~
X mined the profile of the web.
The measured characteristic values of the web are an indication for
the adJustment of the device acting on the web across its width, and from there
indirectly a measure for the positioning of the control members, through the
position of the adJustment members and the control members which are coupled
in mechanical motion therewith.
In both versions, the control device forms signals, which indicate
by which amount a control member must be moved, from the data, however, they
may have been obtained, which represent the present position of the control
members and the predètermined nominal magnitudes. The relationship between
the data and the signal~ for the motion of the control members on the one
hand and between the amounts of motion of the control members and the displace-
ments of the adJustment members resulting therefrom, on the other hand, are
constructively required functions, characteristic of the particular individual
device, which are input into the control device as program, and which then
calculates, with this programming, the correct amounts of motion of the con-
` trol members from the data.
The control device initiates that the individual control members
are coupled with the drive and remain coupled with it until the a unt of
motion which is provided has been made. In this manner, the adjustment
members are again adjusted by the corresponding amounts, whereby the treat-
ment effect of the device acting on the web is locally adapted in accordance
with the measured values. The adaptation takes place cyclically, i.e. at
intervals, the totality of the control members has its position newly adjusted
in accordance with the prevailing measured values.
As already indicated, the device can be used in such a manner that
an operator manually inputs the results of measurements obtained manually,
into the control device by means of depressing the adjustment buttons. This
106;~059
initiates the adaptation cycle, which causes the ad~ustment of the entity of
the adjustment members in accordance with the input data. This would be a
semi-automatic mode of operation of the device.
'; However, in a preferred arrangement the control device is an auto-
matic signal converter, which automatically processes the input data.
Since no action is required by an operator, a fully automatic
~;, operating mode can be obtainet with this configuration.
A contribution is made in this regard if measuring transformers are
provited in con~unction with the signal converter at the points corresponding `~
to the control members in the cross direction of the web.
The measuring transformers provide, continuously or upon demand,
signals for the signal converter, which carries out the motion of the control
members and the adjustment of the adjustment members automatically.
In view of the configuration of the control members, the invention
?J can be realized in two important embodiments.
In the first embodiment, the control members are configured as
carriages which are movable along a guide rail arrangement which extends
~ across the web, and may be common to all carriages.
.,~ ,.
; In a second embodiment, the control members are configured as
rotatable rotating bodies which are stationary and distributed across the
:, .
web. In this case, the rotating bodies can be provided on the same axis on
a shaft arrangement which is common to all.
` By the fact that in both embodiments all control members are movable
together (on the common guide arrangement, or common shaft arrangement,
respectively) their drive can be simplified considerably, in any case, for
example, in comparison with an arrangement in which all separately guided
; control members are also separately driven.
Motion coupling of the carriages and the associated adjustment
members can be realized in one embodiment in such a manner that a control
surface which is not parallel to the guide direction is provided on each
carriage, each ad~ustment member having a follower element which lies against
the control surface.
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~06'~059
,.. .
Because the adjustment members are arranged in a stationary bear-
" ing, the control surfaces are displaced with respect to them upon motion of
,',;~, :. . .
~; the carriages. This displacement is sensed by the follower element (analogous
to a cam) and is transmitted to the adjustment member. In the case of
linearly displaceable adjustment members, the displacement direction can, for
example, be perpendicular to the guide direction of the carriages. ;
In a corresponding manner, a control surface, can be arranged on
each rotating member and every adjustment member can have a follower element
which lies against this control surface.
The configuration with the control surface and follower element
is only one possibility of the mechanical motion coupling between control
member and adjustment member.
A linkage arrangement, which is supported on a stationary point at
one point and on a linkage guide Gn the control member at another point, can
;
also be associated with the control member. A third point of the linkage
arrangement can be positively connected with the adjustment member and the
t,, linkage arrangement can be 80 configured that, upon motion of the control
member, it imparts motion in the adjustment direction to the adjustment
member. The linkage arrangement may be bell crank supported at its vertex
~. .
on a stationary point and engaging with one leg the linkage guide and with
, .
the other leg the adjustment member. Alternatively the linkage arrangement
may be a toggle lever consisting of linkages, where the elbow joint is
~i supported on the linkage guide and engages the fixed point with one arm and
the adjustment member with the free end of the other arm.
~ In addition, teeth can be provided on the control member, meshing
,i with a rigidly supported pinion, which is connected with a device for the
transformation of a rotary motion into a motion of the adjustment member in
its adjustment direction. This device can comprise an eccentric, which has
a rotary connection with the pinion, and the adjustment member can comprise
a follower element which lies against the eccentric. However, the pinion
can also have a rotary connection with an axially fixed spindle nut which
acts on a threaded spindle connected to the adjustment member.
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~ 10620S9
Finally, the adjustment member can also be connected directly with `
the control member.
In one of the important embodiments of the invention, a transport r~:
rail which can be moved to and fro is included in the guide rail arrangement,
and on each carriage i8 a stop device, by means of which, upon reaching a
preselected position, the carriage can be uncoupled from the transport rail
and at the same time can be attached to the guide rail arrangement, and vice
versa. It is, therefore, possible to bring all carriages into the desired
i positions with only one transport rail.
The arrangement with the carriages which can be moved on the guide
- rail arrangement by means of one transport rail is in itself known from the
- German AS (Auslegeschrift) 24 08 513 and 24 41 080.
For the purpose of the coupling of the carriage with the transport
rail, the stop device includes a bolt engageable in a recess in the transport `
rall, and a sensor provided on the carriage reacts to the approach o a mark
attached to the transport rail, where the ~ensor letff the bolt seat in the
reces~ of the transport rail upon reaching the mark. In this way the stop
device effects immovable locking of the transport rail to the carriage, and
this lock can also always engage. When thu~ a carriage, as resulting from
the measured values, must be displaced and is to be moved along with the
transport rail in its forward or backward move, the bolt jumps into the recess
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~06ZOS9
i' provided in the transport rail for this purpose when it passes the bolt. The
carriage is then moved along by the required distance until the bolt again
releases the transport rail and the carriage is secured to the guide.
In the corresponding embodiment for control members which are -~
configured as rotating members, the stop device for coupling the rotating
~,~
member with the shaft arrangement can comprise a bolt which can be seated in
a recess of the shaft and a sensor can be provided on the rotating member
- which reacts to the approach of a mark attached to the shaft arrangement,
where the sensor lets the bolt seat in the recess of the shaft arrangement
~` 10 upon reaching the mark.
:5;; .
` It is a significant characteristic of this configuration of the
invention that measurement of the position of the control members does not
take place on them individually, but through an element which is always
~' common to all control members, namely the transport rail in the case of the
carriages, or the shaft arrangement in the case of rotating member8, where
the displacement can be measured from a reference point, for example, by
the counting of digital lmpulses. The "detection device" thus comprises the
mesns for the detection o the indivldual control members and the means for
the storage, for example, of the individual digital values, at which the
~ 20 control members have been released and stopped, i.e. which represent the
$;. present position of the control members.
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059
To enable exact securing of the carriage on the transport rail,
the bolt and the recess can have a cone-shaped configuration, so that a
centering effect results from the engagement and the bolt cannot remaln on
. .,
the edge of the recess.
In the preferred embodiment, a brake, which is connected with the
as~ociated carrier, is associated with each rotating member, allowing the
rotating member to be arrested in each rotary position. This brake is used
alternately with the bolt and holds the rotating member stationary in its
rotary position as long as the bolt is not seated in the shaft arrangement
for taking along the rotating member.
The same also applies to the connection of the rotating members in
'' the case of a forward ant backward rotation of the shaft arrangement.
The invention can now be realized in many embodiments, as far as
~, these are based on similar problems, which are solved by the basic idea in
accordance with this invention.
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106'~059 .'~
An important embodiment is a head box on a paper machine with a lip
which is adjustable in its height over the breast roll, on vertical adjustment
rods which are differentially distributed over its length over the working
width across the breast roll and which is movable in a guide vertical to the
breast roll.
A device with the above discussed characteristics is provided and
,~ .
S the adjustment members acting on the adjustment rods. The adjustment "
members thus activate the adjustment rods which are arranged vertically to
the guide of the carriages and, in this manner, through the adjustment of
the lip change the space between it and the breast roll.
Another device which is considered for the realization of the
invention is a moistening apparatus for moving paper and similar webs, with
spray nozzles which are distributed over the width of the web and of which
the output quantity can be influenced by valves.
In this case the device with the above-mentioned characteristics
is provided and the ad~u~tment members act on the valves of the spray
nozzles. Thus, in accordance with the amount of movement of the carriages
(and the thus resulting amount of adjustment) these are adjusted differential-
ly, 80 that the spray nozzles operate differentially.
~: '
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~ :, . . - . .
` 106Z059 :
Another device is an application device for the application of a -~
' liquid on a moving web, with an overflow baffle arranged across the web and
which can be adjusted in its height at individual points. In this case the
.i,, ,
device with the above-mentioned characteristics is provided and the adjust-
ment members act on the individual points of the overflow baffle. It is
~, known that, in such a device, and particularly with greater operating widths,
it is extremely difficult to adjust the overflow baffle in a manner that a
uniform application of the liquid results. With the fine adjustment which
is made possible with this invention, the application can be made uniform,
or it can be intentionally made non-uniform.
Another example is a foil drawing nozzle which can be changed in
its discharge width at indivitual points along the nozzle opening. Here
~l again, the above-mentioned device can be provided and the adjustment members
i~ can act on the individual points, in order to adjust the nozzle opening in
~uch a manner that the oil satisfies the ~pecified requirements o thickness
and uniformity.
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,; The invention can also be realized in the form of a calendar with
at least one heated roller associated with cooling air nozzles which can be }
controlled in their discharge quantity by valves, and which are directed
towards the surface of the roller and distributed over the length of the
roller. Thece cooling air nozzles have the objective of selectively cooling
certain areas of the roller which is uniformly heated over its length, in
order to locally slightly change the diameter of the roller and thus to be
able to control the thickness profile of a web, especially a paper web. -~
~i In such a calendar, the above-mentioned device is again provided
~ . .
and the ad~ustment members act on the valves of the cooling air nozzles, so
that these can all be adjusted in the desired manner and the temperature
~` profile along the heated roller can thus be determined.
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~., . ,. , - - . ~ : . .
~06Z05~
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, Still another form of realization of the invention is an air brush
or an air knife, especially for paper coating machines, with a slit nozzle
' which extends across the web and is directed against the web which is to be
i, .
; covered, of which the lips can be changed in position with respect to each
other or the adjustment of the nozzle width through adjustment organs at
individual points which are adjacent to each other across the width of the
web.
These air brushes or air knives are used, for example, in order
to uniformly distribute paint which is applied on the web.
Here again, the above-described device is provided in accordance
with this invention, and the adjustment members act on the lips of the slit
nozzle.
" Finally, a further example is a coating device for moving webs,
with a doctor device, which extends over the width of the web and ~cts on
tbe web at a certain blade angle for the removal o excess coating material,
where the doctor device can be pre~sed against the web by means of several
adjustment members distributed over the length and in which the above-
described device is provided and the adjustment members are provided by ad~ust-
ment links which act on the doctor blade.
, 20 BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings, an embodiment of the invention is illustrated in
., .
detail on a head box on a paper machine and further applications are
illustrated schematically.
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106Z059
~" Figure l shows a side view of the head box, partly in section;
. Figure 2 shows a corresponding view of the left part of Figure l
at an enlarged scale; `
Figure 3 shows a view in accordance with Figure 2, from the left,
whereby the carrier components, which are present on the left of Figure 2,
are omitted or cut away;
Figure 4 shows a cross-section through a guide, the rod, and a
carriage;
Figure 5 shows a schematic illustration of the control of the
device;
Figures 6 to lO show various possibilities of the motion coupling
of a carriage with an adjustment member;
Figure 11 shows a view of the embodiment with rotating members,
which are rotatable on a shaft arrangement, as control members;
Figures 12 to 14 show various possibilities of the motion coupling
of a rotating member with an ad~ustment member;
Figure 15 shows a front view of a moistening apparatus;
Figure 16 shows a longitudlnal ~ection through an application device
with an overflow baffle;
;q~ 20 Figure 17 shows a longitudinal section through a foil drawing : -
~: nozzle;
., .
Figure 18 shows a longitudinal section through a calendar with a
heated roller and air nozzle cooling;
Figure 19 shows a longitudinal section through an air brush; and
: Figure 20 shows a longitudinal section through the doctor blade
arrangement on a coating device.
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~06'~059
;
DESCRIPTION OF THE PREFERRED EMBODIMENTS
In its entirety, the head box is designated as 10 in Figure 1. It
rests on a base 1 and comprises a lower portion 2, as well as an upper portion
3, which are both of self-supporting construction extending over the width of
the paper web which is to be produced and must, therefore, be made as a
strong reinforced welded construction in order to result in the necessary
inherent stability. setween the lower portion 2 and the upper portion 3,
a free through channel 4 is formed, over the width of the web which is to
~i
~i be produced, then continuing, in accordance with Figure 1, to the left into
a chamber 5, and from there transitions into an end section 6. In accordance
with Figure 1, at the right end of channel 4, the paper material is fed in
through lines 5, and is then made uniform on its way through channel 4, the
chamber 5, and the end section 6 by flowing in contact with rollers 7, and
then exits onto the wire 11, which moves in the direction of the arrow and
" carries along the paper material, by passing below the lip 8, which is ad~ust-
able in the vertical dlrection and which is arranged above the upper crown of
the breast roll 9. ;~
The vertical adjustment of lip 8 is carried out through adjustment
rods 12 in a manner which is yet to be described in detail. The lip 8 is
supported in a box beam 13, which can freely move with respect to a box beam
; 14 which is arranged above and a box beam 15 which is arranged to the left in
accordance with Figure 1, and which extends across the width of the web,
and which is sealed with respect to these by means of the seals 16, respec- -
tively 17 and 18, which allow this movement.
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"~''' '' ` ` ~ 06,~ss
,~ This configuration is necessary because, as a result of air feeds
5~ :
19, an excess pressure is produced in the area of chamber 5, in the sealed
space above chamber 5, which acts on the paper material and influences its
di~icharge speed under lip 8. This pressure, of course, also presses on the
right side wall ln Figure 1 and on the lower wall of the box beam 13 which
delineates the channel-shaped end section 6 and would normally bend this
because of its length which extends across the entire width of the web, so
that a satisfactory configuration of the discharge gap of the lip 8 would no
longer be assured. In order to prevent this bending, the pressure above
chamber 5 is transferred into chamber 21 through line 20, so that the box
beam 13 is pressure balanced and the deformations which develop are assumed
by the box beam 15. Therefore, the box beam 13 remains straight at any
pressure.
As can be seen from Figures 2 and 3 in detail, lip 8 consists of
", a metal ~trip, which extends over the width of the web, and which evidences
notches 22 on its upper side, which provide it with greater resiliency for
bending in the vertical cross plane of the web. Bending is applied by the
ad~ustment rods 12, which are distributed in uniform distances over the
entire length of lip 8 and change its position up and down in total, and which
~ 20 can additionally bend it on edge to a certain degree in order to make
:- possible the adaptation of the width of the gap between lip 8 and wire 11.
~ Lip 8 is held against the forces acting on it in the cross direction,
.- between support surfaces on the webs 23, 24, which are inclined towards it,
. at both sides of lip 8.
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- 106;~059
. Adjustment rods 12 essentially extend over the entire height of
box beam 13 and are activated at the upper end by adjustment members 30
which are associated with each adjustment rod 12.
' The box beam 13 continues towards the top in a vertical plate 31,
which, on its front side, i.e. the left side in accordance with Figure 2,
, evidences two perpendicularly projecting webs 32, 33, which are horizontally
arranged above each other at a distance. Each adjustment member 30 comprises `
a rod-shaped pusher 34, which is arranged above the associated adjustment
rod 12, is aligned with it, and is connected with it through a fork connec- -
tion 35. The pusher 34 passes through the webs 32, 33, which are provided
j above the adjustment rods 12, and has, at its upper end, a roller 36, which
; acts as the actuating cam fo the pusher 34. At the opening points through
; the webs 32, 33, the pusher 34 cleanly passes through ball boxes 37. By
means of the coil spring 38, the pusher 34 is resiliently urged in the up-
ward dlrection.
A carriage 40, which is arranged above it, is associated with
each adjustment rod 12, having a control curve member on its underside with
an inclined surface 41, which acts on the roller 36. The carriages 40 are
movable across the web on a guide rail arrangement, which consists, in this
example of the embodiment, o a guide rail 42. The guide rail 42 is rigidly
connected with the plate 31.
A transport rail 43, which is movable in its longitudinal direction
with respect to the guide rail 42, runs parallel to the guide rail 42. The
carriages 40 can be selectively coupled with the transport rail 43 and
carried along with it, as well aa also selectively decoupled from it to then
:-
-20-
.
106;~59
be coupled with the guide rail 42, in a manner which is still to be described
:: with reference to Figure 4. The displacements of the carriages 40 which
~,~ thus result have an effect, through the inclined surface 41, on the vertical
displacements of the adjustment member 30 and thus on the lip 8.
;~ In accordance with Figure 4, the stationary guide rail 42 has, at
its upper and lower side, near the front edge, guide grooves 44, which engage
the corresponding sliding members 45, which are attached to the back of the
housing 46 of the carriage 40. By means of the sliding members 45, the
,i carriages 40 are fixed to the guide rail 42 both in the horizontal and in the
vertical direction, but can be easily moved in the longitudinal direction of
the guide rail 43. . .
s, Inside the guide rail 42, on the side towards the carriage, a
groove 47 is provided which is open towards the outside and which extends
over the length of the entire guide rail 42 and which carries the transport
rail 43, which can be moved under control in the longitudinal direction, in
the groove 47, as will still be described in connection with Figure 5.
Each carriage 40 carries a stop device 50, which cooperates with
the guide rail 42, respectively the transport rail 43, and is designated as
50 in its entirety. The housing 46 of the carriage 40 has a bore 51, which
passes through perpendicularly to the guide rail 42, and which i9 covered
i~ on the outside by a cover plate 52. On the side towards the guide rail 42,
there is an annular piston 53 in the bore 51, having a frictional facing on
the ~ace t~ward= the guide r~ll 42, bec~,ging efiective againRt the plane
C -21-
. .
.: . , , , .... . -
- 1~6'~0S9
, ,i ~
;~ front face 55 of the guide rail 42 with an appropriate position of the piston
~:; 53. ~ :
. , - . .
On the side away from the guide rail 42, a piston 56 is located in -
the bore 51, engaging in the bore 58 of the annular piston 53 with an exten- ~
sion 57, Piston 56 has a recess 61 which is open towards the outside, for
, the seating of a strong coil spring 59, which is supported, on the one side, '. :
,;:" :-
~, against the cover plate 52, and on the other side against the base 60 of the
. recess 61 and, in this manner, constantly resiliently urges the piston 56
'~ in the direction towards the right in accordance with Figure 4. On the side .- ::
~ 10 towards the guide rail 42, a lug 63 is arranged in an axial bore 62 of the ~:
~,, .:
J,".' extension 57 of the piston 56, which is held by an axial bolt 64, which is
~: screwed into the lug 63 and of which the head is arranged within the coil
'~: spring 59 and serves as its guide.
,~ .
At its end projecting beyond the end of the piston 56, towards the
guide rail 42, the lug 63 possesses a cone 65, which can engage in a corre-
sponding conic relief 66 in an insert 67 of the transport rail 43. The conic
reliefs 66 are provided in the transport rail 43 at distances which correspond
to the normal distances of the carriages 40. --
Between the surfaces 68 and 69 of the pistons 53 and 56, which
are directed towards each other, a chamber 70 is formed, including the end
~,i , . . .
;j of the compressed air line 71, which also still has connection with thechamber 70 when the piston 56 is in a position other than moved to the
:. right as lllustrated in Figure 4, in which the bolt 63 is seated in the
transport rail 43.
'''' .
' .'.
' i I ~
,:;
. . .
. -22-
' ~
s~ ~ :
ir 106;~0S9
,;,,
If there is no pressure in the compressed air line 71, the piston
56 is moved to the right by the force of the spring 59 and seats in the
conic relief 66. Through suitable control measures, which are still to be
described, care is taken that the pressure in the line 71 is zero only when
a relief 66 is located just at the right position opposite the bolt 63. The
carrlage 40 is then coupled with the transport rail 43 and is moved along by
it with its movement in the longitudinal direction. In this case, the piston
53 is free, and the frictional facing 54 slides over the front face 55 of
the guide rail 42 without significant friction. `
However, when pressure is applied on the line 71, the piston 53
is pressed against the guide rail 42 and the piston 56 is moved to the left,
with the compression of the spring 59, in accordance with Figure 4, which -
disengages the coupling with the transport rail 43. Thus, at the moment
.. :
` at which the carriage 40 is released from the transport rail 43, it is at the
same time fixed to the guide rail 42 by the force exerted on the front face
of the guide rail 42 by the piston 53 through the frlctional facing 54. Thus,
the carriage 40 can only be moved along by the transport rail 43 or be fixed
to the guide rail 42.
,, In Figure 5, the characteristic of the device in accordance with
this invention is schematically illustrated, whereby all components which
are not necessary for an understanding have been omitted. At a point which
! follows the position illustrated in Figure 1, the paper web 100, at a point
where it has already formed, is scanned by a set of measuring probes which
are arranged at equal distances
~-,
~ -23-
~ .
. , .
`
' ~062059
f~ across the width of the'web, ~nd which in number
'''- 'correspond to the number of the carriages, and which
are provided in places which correspond to the normal
positions of the carriages 4'0. In the example of the
.
, 5 embodiment of FIG. 5, only five measuring probes 80 are
~ i , .
h,~ ' indicated, but it is understood, that there will be more
in reality, in general. Instead of several measuring
probes which are rigidly arranged next to each other,
one or several'traversing measuring probes can be used,
10' which emit signals at the desired positions. The
~ .
measuring probes 80 provide electrical signals which,-
for example, represent the area weight of the paper web
100 at the point of the particular measuring probe.
~`' The entity of the signals which are produced is input
~ . .
'l 15 into a digital computer 90, to which is conne~fted,
~hrough a line 91, a display and operating device 92.
A curve 94 is represented on a CRT screen 93 in the display
' and operating device 92, where the pattern correspon~s to
~! the pattern of the values determined by the measuring
,i ! ~ 20 probes 80 across the width'of the web. For éxample,~each
vertical line below the curve 94 can correspond to the
measured value of one of the measuring probes 80.
By means of the display and operating device 92,
' the nominal curve can now be predetermined, which is
illustrated by the horizontal, dotted line 95. This
nominal curve represents, for example, the desired uniform
- pattern of the area density across the width of the web.
l~ ~ This nominal curve 95, i.e., the nominal values
¦ corresponding to the positions of the individual measuring
probes, is now also input into the computer 90, which
.
-24-
~''' . 10~'~059 ,
determines the deviatlons of the prevailing values
', determined by the measuring probes 80 from the nominal
values, and forms appropriate control signals from these
~' deviations, which are fed to the drive and activating
"' 5 organs of the carr~ages 40 through the line 96.
~ .
' In order to avoid a reaction of the control to
accidental deviations, several sets of measured values
are obtained at timed intervals from the moving paper
- web, and are averaged. Only the average value is
significant for the control.
' In FIG. 5, only one carriage 40 is illustrated
t,
; on the guide rail 42. However, it is understood that
'~;' ' several carriages 40 are always present on the g~ide rail
~' ' 42, as ~orresponds to the measuring probes 80.
~ The maximum stroke of'each carriage 40 is
dete'rmined by the extent of the inclined surfaces in
' the direct'ion of motion of the carriages 40. In the
~, . .
example of the embodiment, each carriage 40 carries out
only a maximum stroke, which corresponds approximately to
its width, because', otherwise, the inclined surface 41
would fall off the roller 36 (see FIG. 3).
In the points corresponding to the position of
the measuring probes 80, the inserts 67 with the conic
`'~ reliefs for the stopping of the carriages 40 on the
'' 25 transport rail 43, are provided on the transport rail 43.
'' The individual carriage 40 is narrower than the distance
'' of 'the inserts 67, so that a siaewise play in the motion
still remains.
The individual carriage 40 moves only in the area
30 - between the adjàcent inserts 67. In this manner, its
stroke and t-hus also the stroke of the adjustment members 30
- -25-
.
6ZOS9
' is limited, so' that an assurance is given against the
. destruction of the lip 8. The limitation of the
.', motion brings with it that the energy feed'lines can
be configured as loosely han~ing flexible.lines. Thus,
i'l . : '
in FIG. 5, a compressed air tubing 81 is provided for.
' the connection of line 82 which is constantly under
', . compressed air pressure and the valve attachment 83
:. . .
on the carriage'40. The valve attachment 83 contains
~', '. ' an electromagnetically activated valve, which provides
i i
or.interrup.ts the connection between the compressed air
. tube 81 and the compressed air line 71 in the housing 46
' of the carriage. The feed-in of the electrical energy
. for the valve attachmént 83 is carried out through.the
¦ flexible line 84. In addition,'a flexible.line 86 is
.; lS provided, leading to a sensor 85, which is attached to the~ . side of the carriage 40, being configuréd as an inductive
i¦ proximity switch and reacts to bores,87 which are located
. i'n particular points of the transport rail 43. The
distance of the bores 8i from the associated inserts 67
.; 20 is such that, with a reaction_of the sensor 85, the.bo'lt
63 (see FIG. 4) is located exactly opposite the insert 67.
. Lines corresponding to lines 81, 84, and 86 are
provided on each individual carriage 40, and each
individual carriage 40 is separately connected with the
~, 25 computer.90 through lines corresponding to lines 84 and 86.
'I The drive of the transport rail 43 and thus of the
' carriages 40 is carried out through an electric motor 88,
which acts on a worm wheel 97 through a worm 89, resulting
on an action, through a spindle nut g8, on the threaded
spindle 99 which is connected with the transport rail 43.
,
. . -26-
,
~ . 106;~0S9
~. - . . - .
, ...... . .
The stroke of the-transport rail 43, which is effected
by the motor 88, is limited by the two limit switches
~,~ 101, 102. This stroke corresponds to the maximum stroke,
, . .
which a carriage 40 must'traverse. It is also understood
that the drive of the carriage 40 could also be carried
out through a hydraulic adjustment member or in another
~ manner.
~, The position'of the transport rail 43 i's measured '-
~' through an angular momentum indicator which cooperates
~ ,. . . . .
~,, 10 with the spindle nut 98, producing a number'of impulses
per revolution which corresponds to the desired,accuracy.
Instead, a linear sensor or another type of sensor could,
however, also be used.
The apparatus operates as follows: -
'15 - Let it be assu~ed that the transport rail is
located in an end position. At this particular moment, let
~! the area weight values determined on the moving web 100 by' the measuring probes 80,be represented by the curve 94r
", let the nominal pattern specified by the ,display and
,~ ~", 20 operating apparatus be represented by the line 95. In the
~1 - , .
, area of the reference lines of the number 95, the prevailing
l .
!''~ values lie below the nominal values; in the area of the
,l , reference line 94, above it. Therefore, the web is too'`l -
,; ' thin in the first area,, and too thick in'the latter area.
The lip (see FIG. 2) 8 would, therefore, have to'be raised
somewhat in the area of the reference line of the number 95,
, while it would have to be lowered in the area, of the
reference line of the number 94.
' In the arrangement and with the inclination'of the
, 30 inclined plane 41 illustrated in FIG. 5, a displacement of
.
, -27-
~ ' '
, .
, .. .. . . . .
! .' 1062~S9
~,',- - the carriage 40 to the left means a lower,ing of the lip 8,
,~ and a displacement to the right a raising of the lip 8.
s'r~ Thus, those carriages of which the associated measuring
~": ' . .
,~ probes result in values below the nominal line 95 must
, ' 5 be displaced to the right, and those carriages, of which
~, the associated measured values lie above the nominal',
,~, line 95, must be displaced to the left.
, Now, at a particular point in time, a displacement
cycle is initiated manually or automatically. Motor 88
'~ 10 starts,to run and moves the transport rail 43 from its
; one end position given,,for example, by 'the position of
i,, the limit switch-102. The displacement is measured by a
, counting of the impulses produced in the impulse generator
, 103. The common zero point for the displacements of'all
'~ ,15 carriages 40 is the end position from which the start
takes place. This reduces the possible position errors
~ in comparison with an embodiment in which,'for example, the
,~l ' ' distances,from carri'age 40 to carriage 40 are measured and,
;,l correspondingly, a néw zero point would aonsistently be
,,j 20 made the,new basis. The transport rail,is moved until the
', other limit switch 101 is reached, whereupon the,direction
of rotation of'the motor 88 is reversed and the transport
,~ rail is returned into the original çnd position.
' The computer 90 now prepares the control signals
1 25 ' for'the coupling of the carriages 40. In the stroke from
,~, right to left in accordance with FIG. 5, only the sensors
85 of the carriages 40 are activated for which the prev,ailing
,~ valu'es of the measuring probes 80 lie above the nominal
'l value, 95 in accordance with curve 94. Only in the case of
, 30 these carriages 40, an impulse takes place when the relief 87-
'' . .
~ - -28-
.
- ~
059
~ of the transport rail 43 passes the associated carriage
', 40, resulting in a slgnal in line 84, which opens the
~',, magnetic valve in the valve at'tachment 83 and which.lets
r,~ the compressed air le.ave the,chamber 70 (FIG. 4), in order
~S' 5 to lock the corresponding,carriage 40, with the.transport.''
~, , rail 43, with the engagement of the bolt 63 in the insert
,
.'' 67 of the transport rail 43.
.~.~ , : . . .
~,' , If now a certain carriage 40 has been moved along
' by the transport rail 43 by a certain amount,.which has.
,; . . .
~' 10 been calculated by the computer 90 as suita'ble for the-
' ' adaptation of' the associated prevailing value to the
~i nominal value 95, the computer 90 sends out a signal which,
~, thr.ough line 84, closes thé magnetic valve contained in
, . .
, . the valve attachment 83, whereby the appropriate carriage
3~ 5 iS momentarily decoupled, from the transport rail 43 and
'": . , attached to the guide rail 42. ,
:t" , The same is the case for all carriages which'must
. be moved along to the left corrésponding to curve 94 in
, accordance with FIG. 5.
t
,1 ~, 20. ' During the return stroke of the,transport rail 43,, ' . only the sensors 85 of those carriages 40 are activatedwhich must be moved to the right with respect to their
, original position, which they have maintained during the
forward stroke of the transport rail 43. Here also,,the
25' coupling of the appropriate carriage 40 with the transport
. rail 43 takes place with the passage of the~associated
j , recess 87 on the particular 'sensor 85,. and, a'fter moving ,.
:1 ' along by the amount specified in accordance with curves94, 95~ the decoupling and-the renewed attachment to the
guide rail 42 takes place.
,
106;~059
The measurement of the amounts of displacement is
!.', . . . .
;. :carried out by the counting of the impulses provided by
., .
~ . the impulse generator. At the moment, at which, for a
;~ particular carriage 40 which is separately connected to the
; 5 computer 90 and can, therefore, be distinguished by it,
the associated sensor 85 gives the signal for the coupling
to the transport rail 43, the computer 90 starts with the
counting of the amount of impulses determined for the
correction of the position of this carriage 40. When
- 10 this is reached, the signal is given on line 84, which .
, again applies pressure on.chamber 70, decouples the
, carriage 40 from the transport rail 43 and attaches it
to the guide rail 42.
In this case, the essential advantage is that,
with a single forward and reverse stroke of the transport
. rail 43, all of the carriages 40 which are present are
'i . . brought into the correct position... This considerably
reduces the sluggishness of the adaptation of the position
~;i of the lip 8 to a differential production of the paper web
with respect to the area density. The ~ime sequence of
the displacement.cycles is a function of the individual
:;,
case, for.example, of the operating speed of the paper
machine or of the speed of change of the area weight.
The accuracy of the adjustment of the lip 8,
.l .25 which can be obtained with the described apparatus; i9
. considerable. It has been shown that the carriages 40
. - , .
can be positioned on the guidé rail 42 with an error of
about 0.2 mm. With a horizontal length of the inclined
~j s~rface 41 of 100 mm, this means an error of 0.2%. With
;; 30 a slope of the inclined surface of 1:10, i.e., 10 mm
,, - ,
-30-
' ' ' .
r
106ZOS9
" .:
vertical displacement to lO0 mm stroke, this results in a positioning error
; of the adjustment member 30, respectively the lip 8 of 0.02 mm, a value which
can still be correspondingly lowered by the selection of a lesser slope of the
i inclined surface 41, but which is completely satisfactory for most cases and
especially for the head box which serves as the example of the embodiment.
It is understood that the illustration of the control is simplified.
In reality, quite complicated mathematical models and programs are necessary
for the signal converter 90, especially for the consideration of the
; influence of the time factor.
Another example of an embodiment is schematically indicated in
Figure 6 in which the motion coupling of the carriage and the adjustment
member is carried out, instead of through the control surface 41 and the
follower element 36 of Figures 1 to 5, through a linkage arrangement 160
which comprises an angle lever whose legs are rigidly connected to each other
at an angle. The angle lever 163 is pivotally supported at 164. The free
end of the leg 161 is taken along, in the displacement direction of the trans-
port rail 43 on the guide rail 42, by a linkage guide on the carriage 40,
which is configured as a pin 165, whereby the leg 162 carries out an up and
down motion in accordance with Figure 6, which it transmits to the adjustment
member 30 through a pin 167, which engages an eyelet 166 in the free end.
In accordance with Figure 7, the motion coupling is transmitted
through a linkage arrangement 170, which
C -31-
lf~6f~os9 , .. .
,',' - comprises a knee lever 173, which consis~ts of two
linkages 171 and 172, which can be swivelled with~
fs~ respect to each other about a connecting point,174.
., ~ . - .
~, The connecting point 174 is up and down movably
~ 5 supported in a straight guide,l75 on the carriage 40,
"' , in accordance with FIG. 7. The free end of the linkage
, 171 i.s supported on a stationary bearing point'176, while ' .
the free end of the linkage 172 is rotatably connected
with the upper end.'of the ad3ustment member 30 at 177.
, 10 With a movement of carriage 40 in its displacement
;~ ' . direction on guide rail 42, the adjustment member is
;, ' moved up and down in accordance with FIG. 7.
' , In accordance wi~th FIG. 8, a straight rack 180 is
,,j , provided on carraige 40, acting on an eccentric 182 through
, . .
~,~'1 15 a pinion 181, where a follower e~emen* 183, in the form ,
of a roller which is supported o'n the upper end of adjust-
,' ' ment member 30 engages the eccentric. With the displace-
'' ' ment of carriage 40, a rotation of pinion 181 takes place,
ll: causing,a stroke of the eccentric 182, as well as a
~f
',,i . 20 corresponding stroke of the adjustment ~ember 30. ' -
A similar embodiment is illustrated in FIG. 9.
The straight rack 190 acts on a pinion 191, with,which the
spindle nut 192 is connected. The pinion 191, re,spectively
~: the spindle ,nut 192 have a stationary support in the
ll~ 25 direction from top to bottom in accordance with FIG. 9.
;f The spindl-e nut 192 acts on the threaded spindle 193, which
- is displaced up or down with a movement carriage 40.
In the embodiments of FIGS. 6 to 9, the adjustment
! ' . member 30 is supported in a bearing block 39, which
permits only an up or down motion of the adjustment
membfer and, especially in the case of FIG. 9, prevents
ff
-32-
,
~0~'~059
.;~
;i~ the rotation of the threaded spindle 193.
In the embodiment of Figure 10, adjustment member 30 is the activat-
ing rod of a valve 200. Valve 200 is configured as a spindle valve and has a
stationary support at its one end at 201. The end of the adjustment member
ls hingably connected with the carriage 40 at 202. In the case of a displace-
ment of carriage 40, adjustment member 30 is immersed deeper into valve 200
or it i8 withdrawn from it.
Another significant embodiment is illustrated in Figure 11, where
rotating members 240 on stationary carriers 242 are provided as control
: 10 members instead of the displaceable carriers 40 on a straight guide rail 42
of Figures 1 to 10.
The rotation of the rotating members 240 takes place through a
, shaft arrangement which is common to all rotating members, where the shaft is
~, represented by a through shaft 243 in the illustrated embodiment. However,
short shafts can be present, which are rotatably coupled with each other, for
. each of the rotatlng members 240, or for several of them.
,; The drive shaft 24~ is driven by the reversible gear motor 244. The
angle of rotation through which it moves is measured by means of 2 digital
impulse generator 245.
Each rotating member 240 comprises a disc 246 which is rotatable
on shaft 243 and which lies against an electromagnetic coil 247 with one side,
where the coil is connected with the carrier 242 and is thus stationary, and,
with the disc 246, forms an electromagnetic coupling. On
~.'
~; C -33-
'. 106'~0S9
its other side, disc 246 is held by a retaining ring 248.
As can be seen from Figure 12, which represents a side view ln
accordance with line XII-XII, disc 246 is connected with a magnetic coil 250, -
' for the activation of bolt 249. The magnetic coil 250 and bolt 249 form a
., stop device for locking disc 246 to shaft 243. Bolt 249 is in an approximate
radial direction with respect to shaft 243 and has a conic-shaped configurat-
ion at its end which is directed towards shaft 243. It can engage in a corre-
;' ,~
spondingly formed recess of shaft 243 and couple disc 246 with shaft 243 in
this manner.
;; 10 A sensor is also connected with disc 246, reacting to a mark on
shaft 243, which is configured as a recess 254. Sensors can be, for example, ;~
s~ inductive proximity switches. ,
Recesses 252 and 254 are so arranged that, when the sensor 253
reacts to recess 254, bolt 249 is exactly in front of recesg 252 and can
t,, engage in it. The engagement or witW rawal of bolt 249 i~ effected by the :
, activation of electromagnet 250.
Instead of the magnetic activation of bolt 249, pneumatlc,
hydraulic, and similar activation are also possible.
, In the example of the embodiment of Figures 11 and 12, rotating
member 240, respectively disc 246 possesses an eccentric outer periphery 251
, against which a follower element 210, in the form of a roller, which is
connected to the upper end of ad~ustment member 30, lies. In the case of
a rotary motion of rotating member 240, the adjustment member 30 is thus dis-
placed up or down in accordance with Figure 12.
The operating mode of this device corresponds to
' ` '
~ -34-
: ~. . . . . - . .
: , . . . . . . .
.
106'~:059
that of FIGS. 1 to 10, with the difference that the back and
- forth rotation of the rotating members 240 has replaced the
back and forth displacement of carriages 40. The preparation
,
of the signals takes place in the same manner as illustrated
for the carriages 40 in FIG. 5. Gear motor 244 initially rotate
, . . . .
in one direction. In all rotating members 240 which, as
determined by computer 90, must be carried along in that
diréction, there is an activation of electromagnet 250 with a
corresponding feeding forward of bolt 249 each time that the
particular recess 254 passes the sensor 253. In this manner,
the rotating member 240 is iocked to shaft 243 and is taken
along during the rotation. Simultaneously with the activation
of electromagnet 250, coil 247 is always takèn out of operation,
, . . .
so that rotating member 240 is released from car~ier 242.
When rotating member 240 has passed the angular
distance determined by the computer 90, which is measured by
the impulse generator Z45, bolt 249 is withdrawn and, at the
same time, coil 247 is again activated, so that disc 246 is
¦ attracted and is held in its position in the manner of an
electromagnetic coupling. In this manner, the associated
adjustment member 30 has thus also reached the new nominal
position.
When the shaft has passed through a predetermined
. . .
~ angle, for example 90, the direction of rotation of the gear
1 25 motor 24i is reversed by a limit switch, and the group of
rotating members 240, which must be moved in the othér di-
~i rection, is then turned. In this direction a~so, the rotary
il motion is limited by a limit switch. Because the rotary
motion takes place only through a certain angular distance,
for example, 180, the connections for the electromagnet
250 and sensor 253 can be accomplished by flexible lines.
-35-
. 106;~059 `:
Instead of the eccentric surface 251, rotating member 260 can also ` `
~: be provided with a segment of a gear 261, as illustrated in Figure 13. The
gear segment 261 acts on a pinion 262, which has a stationary support, which
cooperates, in a manner which is not illustrated, with the associated adjust-
i;
ment member for the purpose of its displacement.
In accordance with Figure 14, rotating member 240 comprises a lever ~` -
270, which acts directly on the end of adjustment member 30. `~
~;, The mode of operation in the embodiments in accordance with Figures
13 and 14 is the same as with those in accordance with Figures 11 and 12. ``
In Figures 1 to 5, a head box of a paper machine is illustrated as
embodiment. However, various other applications are possible. These examples `-
of applications are schematically illustrated in Figures 15 to 19. The embodi-
ment with the carriage 40 and the inclined surface 41, which is displaceable
on the straight guide rail 42 serves again as example. It is understood,
however, that, lnstead, the motion couplings in accordance with Figure 6 to
10 and the coniguration with a rotating member as the control member in
~s :~
~i accordance wlth Flgures 11 to 14 can also be used in the same manner.
A moistening apparatus, which is designated in its entirety as 110,
is illustrated in Figure 15 as a further example o an embodiment. With
it, the paper web 100, which moves perpendicularly to the plane of the drawing,
can be brought to a desired degree of moisture. For the purpose of applying
the moisture, nozzles, which are fed ~`
~ : :
?.
1' ` .
C,
-36-
. ~ . . ~, - . ' .:
.
106'~,~59
.... .
from a con~on liquid line 111 and are controlled through
separate valves 112 are provided in an adjacent arrange-
ment across the width of the web. The valves are activated
through adjustment members 30, which are dlsplaced by
~ 5 carriages 40, which are displaceable across the web 100,
., on the guide 42, by means of the transport rail 43.
. An application device, which is designated.in its
. entirety as 120, and by means of which a liquid 122 can
be applied on a web 100, is illustrated in FIG. 16. The
application device 120 comprises a liquid fountain 121,.
into which a liquid feed line 126 discharges. The liquid
~ , - . .
~ assumes a certain filling level 127 and flows over an
, . . .
, overflow edge 123, which extends horizontally àcross the,~, .
~ web 100, in order to reach the web -100 in a falling screen
~,. . . .
~' 15 125.
.~ ~ The accuracy of the application of the liquid is a
function of the accuracy of the horizontal adjustment of the
; overflow edge 123. The adjustment takes place through
adjustment members 30, which engage on the overflow edge
. 20 123 in many points 124, which are adjacently located across
the width of the web and, in a displacement of the overflow
. ,
edge 123, adjust a little h~gher or lower. A carriage 40
is associated with each adjustment member 30, where the
carriage is movable-on a guide rail 42 which is arranged
across the web, and is displaced by means of the transport
rail 43, in order to effect the vertical displacement, in
accordance with FIG. 7, of the adjustment members.30.
A foil drawing nozzle, which is designated in its
entirety as 13Q, is illustrated in FIG. 17. It manifests
two lips 131, 132, which are mutually adjustable, so that
the plastic mass which is pressed through between the lips
-37-
os9 : ~
~: ,:i
s in the direction of the arrow 135 can be formed into a foil of desired thick-
. ~. ;. .
ness. The lips 131, 132 form an aperture nozzle and are somewhat resilient.
At several points 133, 134, which are adjacently located across the width of
the aperture nozzle, they are under compression by adjustment members 30,
which are displaced by carriages 40, which can be moved parallel to the foil
plane on guides 42, by means of transport rails 43. The displacement of the
individual carriages ig controlled through the measured thickness profile of
~' the foil.
A calendar with two rollers 144, 145, which is designated in its
entirety as 140, is illustrated in Figure 18. Of these rollers, at least
roller 144 is uniformly heated over its length. Along the roller, a large
number of ad~acently arranged air nozzles 143 is provided, which are supplied
through a line 141, and of which the air discharge quantity can be controlled
through valves 142. The activations of the valves take place above each valve
142 through associated ad~ustment members 30, which are displaced by carriages
40 in the manner which has already been described several times, being movable
.
on a guide rail 42, which extends parallel to the roller axis, by means of a
transport rail 43.
In order to be able to control the thickness profile of the paper
web 100, the heated roller 144 is subjected to cold air blowing from nozzles
143 in the areas where the paper web is too thin, whereupon its diameter
~` reduces in these areas and the roller gap becomes greater, and thus the
paper web becomes thicker in the required area.
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FIG. 19 is a schematic illustration of a so-
called air brush 150, which comprises an aperture nozzle
.; 155 with two oppositely located lips 151, 152. In the
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, example of the embodiment, the lip 151 has a stationary
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bearing at 154. The~ other lip 152 is, at points 156,
,~ which are adjacently located across the width of the,;,. . .
aperture nozzle, connected with adjustment members 30,
which can be displaced by carriages 40, which can be
.. moved by means of transport rails 43, on a guide rail 42,
which extends in parallel to the apert~re slit. In this
~ manner, the width of the discharge opening can be varied
; over the width of the web 100, whereby the air quantity
and speed can be adapted optionally to the requirements,
as needed.
In FIG. 20, a portion of a coating device, namely,
.. a doctor blade arrangement 280 is schematically illustrated.
/~ !In a preceding station, for examp?e by means of an applicationrol.ler which is not illustrated, the paper web has been
. provided with a coating on its lower side in accordance
with FIG. 20. This coating is doctored as uniformly as
,
possible by means of a doctor blade 281 across the.width
' of the web in order to remove excess coating material
which has been applied and to obtain as uniform as possible
` . a.thin coating of the paper web 100. The doctor blade 28i
25 acts on paper web 100, which is supported on its reverse
..
.. side by the support roller 282. At points distributed
across the width of the paper web 100, the doctor blade 281
is hingeably supported in bearing blocks 283. Levers 284,
on whlch the adjustment members 30 act and swivel them
around the bearings points in the bearing blocks 283, are
connected with the doctor blade 281. Carriages 40, which
.
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are associated with each adjustment member and which are
movable perpendicularly to the plane of the drawing on the
:;~" ` .
guide rail 42, by means of the transport rail 43, effect the
displacement of the adjustment members 30 and thus the
swivelling, respectivély the pressure of the doctor
~, . . . . .
, blade 281 against the paper web.
,,'
FIG. 20 represents a purely schematic illustration.
In practice, there will be, through a suitable linkage
arrangement, an adjustability both of the angle of
~ .
incidence of the doctor blade 281 with respect to the
` paper web lO0 and also an adjustability of the force of
the pressure.
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