Note: Descriptions are shown in the official language in which they were submitted.
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PB 3751
BACKGROUND OF THE INVENTION
In known flatbed printing machines, especially offset printing machines, it is
necessary, when the image to be printed is changed, to change the typeforms.
To do this, the
entire printing machine must be stopped; the exchange of typeforms is
generally done manually.
However, automatic converting systems (robotics) are also known. In forms-
printing machines,
cylinders are exchanged manually, in part. In intaglio printing machines, the
exchange of
cylinders using cranes is a common procedure.
A printing machine is known from U.S. Pat. No. 5, 186, 103 which is used in
particular for printing on a paper web of heavy or thick stock material and
which has
interchangeable cylinders. Because, in keeping with the various packaging
materials to be
printed on, the images to be printed are of various widths and lengths, it is
necessary to use and
exchange plate cylinders of various diameters. Either the plate cylinder alone
(in direct printing)
or the plate cylinder together with the blanket cylinder (in offset printing)
is located in an
interchangeable cassette, which can be removed from the printing tower in
question of the
printing machine. A hoist, which is attached movably to a rail, is used to
remove the cassette.
The hoist first draws the cassette upward and then transports it away, in
order to exchange it for
Image
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PB 3751
SUMMARY OF THE INVENTION
.:,
An object of the present invention is therefore to provide a printing machine
in
which any desired cylinder or any desired roller can be easily changed, so
that easy cleaning,
as well as flexible exchange between printing jobs that require different
rollers or cylinders; is '
possible.
This object is attained by an embodiment of the apparatus of the present
invention
which is a printing apparatus having a mounting disposed within the printing
machine. A first
cylinder is positionable within the mounting. The first cylinder has a fixed
interface for
establishing at least one of side and circumferential registration between the
first cylinder and
the mounting. A second cylinder is provided and also positionable within the
mounting.
Similarly, the second cylinder has a fixed interface fox establishing at least
one of side and
circumferential registration between the second cylinder and the mounting. A
cylinder
exchanging assembly is provided for removing the first cylinder from the
mounting. The
cylinder exchanging assembly includes a gripper assembly and a cylinder
exchange device for
holding the second cylinder. The gripper is operable to exchange the first
cylinder for the
second cylinder in the mounting and to place the first cylinder in the
cylinder exchange device,
thereby exchanging the first cylinder and the second cylinder.
It is also, the obaect pf the ~prpsent inventiQ,~ to create a ~pri~tin~;
machine ~n which
~,
the plate cylinder together with the typeforn can be changed quickly and fully
automatically.
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PB 3751
This object is attained by a further embodiment of the present invention in
which
the first cylinder is a first plate cylinder having a removable first typeform
on an outward
surface thereof and in which the second cylinder is a second plate cylinder
having a removable
second typeform.
Other objects will be evident from embodiments of the apparatus of the present
invention in which multiple printing units share a cylinder exchanging
assembly.
It is particularly advantageous that after the used plate cylinder with the
used
typeform has been changed, the used plate cylinder can be renewed while
printing is carried out
with the newly substituted plate cylinder. This can be done by having, for
example, the plate
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PB 3751 ,
the plate cylinder itself. In order to install the plate cylinder correctly in
the printing machine
in respect to circumference and side register, there are, for example, movable
bearing sleeves ,
for the plate cylinder in the side walls in the direction of the longitudinal
axis of the plate
cylinder, plate cylinder clamping mechanisms, and serrations between the
cylinder mounting and
the plate cylinder. The distribution magazine which is used for the exchange
of the plate
cylinders preferably has a drum storage device, in which one or more plate
cylinders are stored
for exchange. The gripping, turning and lifting elements with which the plate
cylinder is taken
out of the printing machine and exchanged for another plate cylinder are
preferably constructed
in the manner of equipment of the type used in machine tools, e.g., CNC
machine tools.
In a further embodiment, the plate cylinder to bear the typeform as an
interchangeable sleeve. The sleeve can then be easily removed when the plate
cylinder is first
taken out of its mounting by a removal system, so that then, while the plate
cylinder hangs by
one of its journals, the sleeve can preferably be drawn vertically downward.
Because of gravity,
the weight of the sleeve will contribute to its being easily removable. The
exchange of sleeves
PB 3751
and not as a definition of the limits of the invention, for which reference
should be made to the
appended claims.
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PB 3751
DETAILED DESCRIPTION OF THE DRAWINGS
In the drawings, wherein like reference characters denote similar elements
throughout the several views:
FIG. 1 is an inventive sheet-fed printing machine with an exchange unit with a
gripper
and a lifting device, in several positions, for the exchange of a plate
cylinder
constructed in accord with the teachings of the present invention;
FIG. 2 A sheet-fed printing machine with an exchange unit with a gripper and a
lifting
device, in several positions, for the exchange of a plate cylinder;
FIG. 3 A sheet-fed printing machine with an exchange unit with a gripper and a
lifting
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PB 3751
FIG. 9 A rotary printing machine with a satellite printing unit with an
exchange unit that
is equipped with a drum storage device;
FIG. 10 A cross-section of a plate cylinder and its mounting;
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PB 3751
DETAILED DESCRIPTION OF THE PRESENTLY PREFERRED EMBODIMENTS
Referring now to the drawings generally and with reference to each FIG.
specifically, the present invention relates to printing machines 1, 16, 26, 38
having plate
cylinders 5, 18, 28, 29, 60 to 63 carrying typeforms which, together with the
typeforms, can
., .
PB 3751
circumferential surface of which the sheets are printed on by a plate cylinder
5 via a blanket
cylinder 6. Each respective cylinder 4, 5, 6 has a longitudinal axis for
rotation thereabout.
The printed sheets are further transported from the impression cylinder 4 to a
pickup drum 7. The pickup drum turns the printed sheets over to an impression
cylinder, not
shown here, of another printing unit of the printing machine 1.
For the purpose of exchanging the plate cylinder 5 with an exchange unit, the
printing machine 1 is equipped with a gripper 8, a lifting device 9 and a
double gripper 10,
which is installed in a frame or rack 11. As shown in FIG. 1, the double
gripper 10 is already
carrying a plate cylinder S', which can be exchanged for the plate cylinder 5
after the typeform
of the latter has been used or when a different print job is to be carried
out. The double gripper
functions as the cylinder exchange device and, as will be seen in detail
below; is movable
so that lifting device 9 may place a plate cylinder 5 into the double gripper
and receive plate
cylinder 5' in exchange therefor.
The gripper 8 is, for example, installed in the frame or rack 11 of the sheet-
fed
printing machine 1 so as to be swingable in the directions of a double arrow
A. Additionally,
:'
as will become apparent from the discussion below, it may also be desirable in
particular
embodiments for gripper 8 to additionally be moveable in the direction of
double arrow C' . The
gripper 8 has two gripping arms 80, each of which is equipped at the end with
a prong 82 and
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PB 3751
S, for example and as will become apparent in connection with FIG. 10, a
seating slot S1 in a
journal 520, of the plate cylinder S.
Inking rollers 130, 131, 132 of inking unit 133 are housed within printing
unit la.
Inking rollers 130, 131, 132 are moveable in the direction of arrow B
by use of arrangements
known in the art and accordingly, for the sake of clarity, are not shown
in FIG. 1.
The lifting device 9 is movable by, for example, a threaded spindle,
a toothed
rack or a chain drive, in the direction of a double arrow C. As sho-wn,
the lifting device is a
threaded spindle 91 coupled to the side wall 12 of the sheet-fed printing
machine 1.
Referring now to FIG. 2 which shows the arrangement of FIG. 1 during
the
exchanging of plate cylinder S for plate cylinder S'. As can be seen,
inking rollers 130, 131,
132 have moved in the direction of arrow B of FIG. 1. Similarly, double
gripper 10 is shown
as having moved to an intermediate position for receipt of plate cylinder
S.
The gripper 8 and lifting device 9 are arranged so that once prong 82
and
clamping device 81 have been grasped by gripper 8, gripper 8 and plate
cylinder S may move
as a unit to a position where gripper 8 can release plate cylinder S
so as to be carryable by
lifting device 9.
The double gripper 10 has two lever arms 100, 101 each of which has a
holding
device 102, which can be drawn back and forth, for firmly clamping the
plate cylinder S or the
plate cylinder S' that is to be exchanged for the plate cylinder S during
the exchange operation.
I ~ , ;~ i I a .;,
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PIG. 3, shows the arrangement of FIG. 1 wherein the plate cylinder S
has been
carried by lifting,device 9 to a position 'where it may be received by
double gripper 10.
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PB 3751
FIG. 4 further shows that double gripper 10 is rotatable by 180 degrees, in
the
direction indicated by double arrow D, so that plate cylinder 5 may be moved
out of the way
Image
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PB 3751
the plate cylinder 5. In turn, the double gripper 10, with its two prongs in
the seating slots 51
of the plate cylinder 5, picks up the plate cylinder 5 on a lever arm 100. ~ ,
After the double gripper 10 (FIG. 3) has taken over the plate cylinder 5 from
the
lifting device 9 and has firmly clamped the plate cylinder 5 by means of the
holding device 102,
the lifting device 9 again moves downward (double arrow C) out of the swing
area of the double
gripper 10.
Then the double gripper 10 rotates by 180 degrees (FIG. 4) in order to bring
the
plate cylinder 5' into the pick-up position for the lifting device 9. The
lifting device 9 is again r
moved upward, until it reaches the position in which it takes over the plate
cylinder 5', as soon
as the holding device 102 of the double gripper 10 that is holding the plate
cylinder 5' is
released.
The plate cylinder 5' (FIG. 5) is then brought by the lifting device 9 and the
gripper 8 into its printing position in reverse order but in the same manner
that the plate cylinder
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was previously removed from its position in the printing unit 12 of sheet-fed
printing machine 'v''w''~>
1. The inking unit rollers 130, 131 and 132 are then swung back e.g. in the
reverse direction
to the direction of movement described above in FIG. 1 by double arrow B.
Alternatively, as shown in FIG. 6, a different type of imaging unit can be
provided, which is located in a rack 150 and includes an erasing device 151,
for example, a
plasma torch integrated with the rotational axis of the double gripper 10. In
this embodiment,
the imaging unit 15 has an engraved roller 152 with an integrated heater. The
plate cylinder 5
is movable to a position 52. An image~is imprinted using a foil 153 onto the
plate cylinder 5
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PB 3751
and is fixed on the typeform by a fixing device 156. During use, the
imprinting foil 153 is
unwound like a film from a cassette 154, and the used imprinting foil 153 is
rewound into a
cassette 155. Thus, the imaging sequence may be earned out while sheets are
being printed with
an image on the plate cylinder 5'.
It is important for the imaging unit 14 or the imaging unit 15 to be installed
in
a vibration-free manner. If the imaging unit is located above the printing
tower, suitable
absorption means are provided, in order to capture the vibrations of the
cylinder. If such a
measure is not sufficient, the imaging unit is located next to or below the
printing tower.
It will also be recognized and understood that instead of exchanging a plate
cylinder 5 for a plate cylinder 5', as has been described above, the apparatus
of the present
invention makes it equally possible to exchange other cylinders, for example,
the blanket
cylinder 6 or the impression cylinder 4, or one or more of the inking rollers
130, 131, 132.
Where other cylinders are to be exchanged, the mountings of the cylinders or
rollers must have eccentrics. In this embodiment, the gripper 8 must be able
to swing out the
cylinders and rollers from the mountings in question. For this purpose, the
gripper 8 has, for
example, telescopic arms, the length of which can be changed. Thus, for this,
the gripper 8 is
:' ~~,',,
preferably slidable in the direction of a double arrow C' (FIG. 1 to 6).
FIG. 7 shows a rotary printing machine 16 for printing using the offset
printing
process on a stock web 17 by means of a plate cylinder 18, a blanket cylinder
19 and an
~, ;1 1 ~1 ! , ,
impression cylinder 20. The rotary printing machine 16 also includes an inking
unit 21 and a
dampening unit 22.
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r~ .~ ~j ~I ~ ~ j PB 3751
Form inking rollers 210, 211 and form dampening roller 220 lie on or proximate
to the surface of the plate cylinder 18. The rollers are movably mounted to
enable them to
swing out of the way of plate cylinder 18. As preferred, rollers 210, 211, 220
swing away from
plate cylinder 18 so as to allow plate cylinder 18 to move away from blanket
cylinder 19, shown
for illustration purposes as in the direction of arrow G. As will be
recognized by those in the
art, for clarity, the apparatus which is used for movement of rollers 210,
211, 220 and plate
cylinder 18 is not shown. When the rollers 210, 211, 220 are swung away from
the surface of
the plate cylinder 18 and the plate cylinder 18 is moved slightly away from
the blanket cylinder
19 within the printing machine 16, for example, in the direction of arrow G,
the plate cylinder
can be removed from the rotary printing machine 16, for example, by means of a
cylinder
exchange device in the form of a gripping-and-turning system 24 located
movably on a rail '
frame 23, and which is movable towards and away from rotary printing machine
16 as shown
by double arrow F. The gripping-and-turning system 24 is constructed as a
double gripper and,
for example, is similar in design to the double gripper 10 shown in FIGS. 1
through 6. The
gripping-and-turning system 24 picks up the plate cylinder 18 wit~'~ one of
its arms 240. On its
other arm 241 it carries a plate cylinder 18' to be exchanged for the plate
cylinder 18.
The gripping-and-turning system is preferably centrally located between the
rotary
printing machine 16 and an imaging device 25 so that the arms 240, 241 may
complete a turning
movement of 180° without interference. Accordingly, the plate cylinder
18' can then be placed
: . ItI 1 , I 1' I
"
into the position of the plate cylinder 18 in the rotary printing machine 16.
After the exchanged
plate cylinder 18' is positioned on the blanket cylinder 19 and the form
inking rollers 210, 211
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PB 3751
and the form dampening roller 220 are swung back, the printing sequence for
printing on the
stock web 17 may be continued. Having now received the plate cylinder 18, the
gripping-and-
turning system 24 transports the plate cylinder 18 from the rotary printing
machine 16 towards
the imaging unit 25. Imaging unit 25 includes an erasing device 250, an
imaging device 251
and a fixing device 252. As with the devices shown in FIG. 5 and FIG. 6, the
printing image
of the typeform on the cylindrical surface of the plate cylinder 18 is first
erased by the erasing
device 250, and then a new image is provided by the imaging device 251. In
addition, there
may also be another fixing device 252 available, with which the new printing
image can be
fixed.
FIG. 8 shows a sheet-fed printing machine 26 which has its own pointing unit
or
tower 27 for two-color printing. Accordingly, the sheet-fed printing machine
26 contains two
plate cylinders 28, 29, each of which transmits an image via a blanket
cylinder 30 or 31 onto
a sheet, which is held on the surface of an impression cylinder 32 and after
being imprinted, is
transported away via a transfer device 320.
For the sake of simplification, the inking unit and the dampening unit are not
shown in detail in FIG. 8. To exchange the plate cylinder 28, 29 in a single
operation, when
the subject to be printed is changed, there is a gripping-and-turning system,
which includes the
grippers 34 and 35 as well as a drum storage device 36. In this embodiment,
the grippers 34,
35 grip the plate cylinders 28 and 29, respectively, with holding and clamping
devices which
operate similarly to those discussed and which, for purposes of clarity, are
not shown. The
grippers 34, 35 draw the plate cylinders 28, 29, respectively, out of the
printing unit or tower
QaRSINONLIT1410040.APP -18-
~ ~;.~~tlUt~3
PB 3751
27 in the directions of arrows G and J, respectively, and swing the plate
cylinders 28, 29 in the
direction of arrows I and H toward the empty drums 360, 361 of the drum
storage device 36,
in order to deposit them therein. In two additional drums 362, 363, the drum
storage device 36
carries the new plate cylinders 28', 29' which are to replace the old plate
cylinders 28, 29. The
drum storage device 36 may then rotate by 180° to move new plate
cylinders 28' and 29' into
the position for loading into printing unit or tower 27. In this position, the
new plate cylinders
28', 29' are moved in a reverse operation by the grippers 34 or 35 and brought
into the correct
positions within the printing tower 27. As with the embodiments discussed
above, while printing
is being carried out with the plate cylinders 28', 29', the circumferential
surfaces of the old plate
cylinders 28, 29 are furnished with new printing surfaces by an imaging unit
37. Additionally,
printing tower 27 may also have erasing, imaging and fixing devices as
explained above with
reference to FIG. 5 and FIG. 7, but are not shown herein.
FIG. 9 shows a rotary printing machine 38 for four-color printing, on a
printing
stock web 40, with a satellite printing unit 39. There is a gripping-and-
turning system on each
side of the printing tower with the grippers 41, 42 and 43, 44, respectively.
The grippers 41
to 44 are, for example, attached to the rotational axis of the central
impression cylinder 45 of
the satellite printing unit 39. On both sides of the satellite printing unit
39 there are drum
storage devices 46, 47, which have, in each case, two empty drums and two
drums containing
the, new plate cylinders 60' and 62' or 61' and 63', respectively, to be
exchanged for the used
,I~ ~I i I r; 1 , ~
plate cylinders 60 to 63, and which form, respectively, a cylinder exchange
device. The
exchange process is carried out with the two gripping-and-turning systems in a
manner similar
Q:UtS\NONL1T1410040.APP -19-
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PB 3751
to that described above with reference to the sheet-fed printing machine 26 of
FIG. 8. Again,
as described above, the imaging units 48, 49, are equipped with an erasing, an
imaging, and a
fixing device which may produce new printing images on the circumferential
surfaces of the
plate cylinders 60, 62 and 61, 63 while printing is being performed with plate
cylinders 60', 62'
and 61', 63'.
It will also be recognized by those skilled in the art that chain storage
devices may
be utilized in place of the drum storage device 36 or 46, 47.
It will further be recognized and understood with respect to the embodiments
discussed above that, in addition to the plate cylinders 28, 28', 29, 29' or
60 to 63', additional
drums, other cylinders and/or rollers 4, 6, 130, 131, 132 or 19, 20, 210, 211,
220 or 30, 31,
32 or 45 may also be adapted so as to be exchangeable, for example, for
replacement due to
wear or for cleaning, with corresponding drums, other cylinders and/or rollers
stored utilizing
a chain storage device or the drum storage device 36 or 46, 47 in accordance
with the teachings ,
of the present invention.
For example, and in particular, where the drum, cylinder or the roller is
merely
dirty, it can be cleaned by a cleaning device 365 or 465, 475 located next to
the chain or drum
..,r.,:~:~
,,
storage device 36 or 46, 47. The respective cleaning devices 365 or 465, 475
are attachable to
:::,~_.,.:,
:;
and detachable from the chain or drum storage device 36; 46, 47. Where
cleaning is a
;:.::
contemplated function, a suitable motor should be coupleable to the drum,
cylinder or roller so ~ ~ '"f
j,~ " i, I I ~, ~ . f '";,,.
that during cleaning, the drum, cylinder or roller will turn about its
longitudinal axis in the chain
'
':'.;,, ..,
i.;~;:~':~:~ !~
or drum storage device 36; 46, 47. ~ ~ ",
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PB 3751
Referring now to FIG. 10, and as previously noted in connection with FIG. 1,
the
gripper 8 has two gripping arms 80, each of which is equipped at the end with
a prong 82 and ;
a clamping device 81, which fit respectively collateral to the front sides of
the plate cylinder S
into a seating slot 51 in a journal 520 of the plate cylinder 5. Similarly,
the lifting device 9 has
two side prongs which engage the plate cylinder 5 via seating slots 52 in
journal 520.
The plate cylinder 5 is installed, using a journal pin 505, above a mounting
50
in the side wall 13. The mounting 50 has a bearing bushing 500 with hydraulic
clamping, in
which a bearing sleeve 501 is movably located within an area d parallel to the
longitudinal axis
of the plate cylinder 5. Via an axial bearing 503 and a radial bearing 504,
the journal pin 505
for the plate cylinder 5 is movably located in the bearing sleeve 501. The
journal pin 505 is
also equipped with a plate cylinder clamping mechanism 506, which has clamping
jaws 507.
The clamping jaws 507 encircle a corresponding fastening pin 508 of the plate
cylinder 5 and
are, for example, pneumatically loaded and relieved. In addition, thz plate
cylinder 5 and the
journal pin 505 each have a corresponding serration 509, for example, a Hirth-
type serration,
' through which the plate cylinder 5 is held and centered on the shaft. The
plate cylinders 5', 18,
18', 28, 28', 29, 29' and 60 to 63 and 60' to 63' are installed in a similar
or identical manner.
It will be further recognized and understood that
instead of the serration 509 shown here, other. types of serrations may be
used, for example,
serrations in which the teeth are slanted at the roots, so that the plate
cylinder S is self centering x ' ~:!;
~ i; ~ ,I I i , ,~ i 1 1~ r!!''v
,; ~ t
when placed in the printing machine, and further, in order to precisely
establish the position of
,,
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::~.t ..~~... .1~.,;~~... .:r:a:,.~n..:...,..., :..:~r..:,....:....:., ..,:w
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~,i~Ul~~t~~
PB 3751
the plate cylinder 5 during its removal or during its return, mechanical,
optical or electronic
positioning means can be used alone or in conjunction with the serrations.
Furthermore, a correct mounting of a cylinder in terms of circumferential
register
is important, not only in the case of the plate cylinder, but also for
example, in the case of the
blanket cylinder, if the latter has no seamless rubber sleeve. Correct
mounting is also important
'v 2._Yl..~~1~.~
in the case of the form inking roller, if the plate cylinder has one or more
channels and the form
inking roller has corresponding reliefs in the contour of its core where,
instead of the core
material, there are thickenings of its outer covering, which respectively roll
off the channels of
the plate cylinder.
In another embodiment of the present invention shown with reference to FIGS.
11 and 12, a rotary printing machine 16 as for example, disclosed in DE 35 43
704 Al, is
equipped with a plate cylinder 95, the typeform of which is designed as an
interchangeable
sleeve 96 which is held frictionally on the covering of the plate cylinder. In
accord with the
teachings of the present invention, the plate cylinder 95, like the plate
cylinder 18 of FIG. 7,
is lifted out of the rotary printing machine 16 by a removal system 90 by
means of gripper 92
and gripper 93 which is blocked from view by gripper 92 in FIG. 11 but is
visible in FIG. 12.
The grippers 92 and 93, respectively, hold the plate cylinder 95 in the slots
51 in its journals
~i~Uut~~
PB 3751
is returned to the horizontal position and replaced into the printing unit 16
for the continuation
of the printing process. .
FIG. 13 shows the sheet-fed printing machine 1 of FIG. 1 employing the plate
cylinder 95 with an interchangeable sleeve 96 of FIGS. 10 and 11. As will be
readily apparent,
the other parts and elements correspond to the parts and elements identified
and described above
and are therefore not discussed. The lifting device 9 has two gripping arms
901, 902. The
gripping arm 901 has a clamping device (not shown here) with which it can
clamp and hold the
~.~~a~utD
PB 3751
of double arrow C, in order to create space for sleeve 96 to be removed. Once
gripping arms
901 and 902 have been moved to their proper respective locations, using a
removal device, not
shown here, the sleeve 96 of the plate cylinder 95 can then be pulled
downward.
A still further embodiment of the present invention is shown in FIG. 15, in
which
frame 11 or 11' are removed or unnecessary. Again the plate cylinder 95 is
held and clamped
firmly by the gripping arm 901 of the lifting device 9. However, because in
this sheet-fed
printing machine 1 the frame 11 or 11' is not present, the plate cylinder held
on the gripping
arm 901 can be rotated in the horizontal plane in the direction of an arrow M,
around its journal
:-y
r ~
520' above the printing tower after the other gripping arm 902 of the lifting
device 9 is moved , . .
as hereinabove discussed a distance downward out of the swing area of the
gripping arm 901.
Then the sleeve 96 can be pulled off horizontally by a removal device, not
shown, from the plate
cylinder 95 and exchanged for a replacement sleeve. Through a reverse sequence
. of
movements, the plate cylinder 95 is again placed in its mounting 50 in the
sheet-fed printing
la~v~~~~
PB 3751
respective printing units 401 to 405 and position the cylinder or roller in
the area between the
printing towers 401 to 405 in such a way that a trolley 414 located on a rail
413 above the sheet-
fed printing machine 400, which has a telescopic arm 415, can grip the
cylinder or the roller.
Then the trolley 414 transports the cylinder or the roller either to an
exchange device not shown,
which in turn has, for example, a drum storage device as shown in FIGS. 8 and
9, or to a .
cleaning device 416 in which the cylinder or roller is cleaned.
If the cylinder is a plate cylinder with a renewable typeform, the trolley 414
transports the cylinder to an erasing device 417. There the image which the
typeform displays
on its cylindrical surface is erased. Then the typeform is provided with a new
image in an
imaging device 418. The new printing image is then fixed in a fixing device
419. The cylinder
is placed on the telescopic arms 415 in such a way that it can be rotated by
means of a motor,
so that it can be rotated on its longitudinal axis during the erasing, imaging
and fixing process
or during cleaning.
a
Instead of the trolley 414, which is installed in hanging fashion, there can
also be , ~ , 's
a device that stands to the side of the printing units and is movably
installed next to the printing
units 401 to 405 either on a rail system or controlled inductively by a wire
system located, for
example, along or embedded in the underlying floor, or through optical or
electrical waves.
. . , ,. .. . ~,:
~1~~~~~i
PB 3751
can be located, in each case, between two printing units and can carry out the
exchange of any
desired cylinders and rollers in these units. For this purpose, the exchange
units with the
grippers 8; 24; 34; 35; 41 to 44 and the cylinder exchange devices 10; 24; 36;
46, 47 are
preferably installed so as to be rotatable around their respective vertical
axes.
Instead of the form cylinders 5, 18, 28, 29, 60 to 63, it is also possible to
exchange other cylinders or rollers 4, 6, 130, 131, 132; 19, 20, 210, 211,
220; 30, 31, 32; 45.
The plate cylinder 95 can also be covered with an interchangeable sleeve 96
which constitutes
the typeform.
The invention described in respect to the sheet-fed and rotary printing
machines
1, 16, 26, 38, 400 for the offset printing process is not limited thereto, and
thus can also be
applied to printing machines used in other types of printing processes, for
example, intaglio
printing, In another embodiment of the invention, a rotary or sheet-fed
printing machine 1, 16,
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