Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
r., 2038631
SPLICE AND PROCESS FOR MAKING
A SPLICE ON THE LEADER OF A PAPER ROLL
BACKGROUND OF THE INVENTION
The invention concerns a splice on the leader of a
paper roll, and a process for making such a splice.
Adhesive tapes have been utilized which on one side
feature the adhesive layer, or adhesive layers, for
taping the end of the old web and the leader of the new
roll. Part of this adhesive layer is glued underneath
the start of the new paper roll.
There is a prior process for making seam splices on
running webs, on unwinding devices, for instance for
coaters, where a double-sided adhesive tape is applied on
the end of the web wound into a paper roll. Once the
web end has then been fixed on the paper roll, the second
cover foil of the adhesive tape is removed so that when
pushing down on the old web passing the paper roll the
ends of the webs are being spliced. The disadvantage
encountered is that in the following coater, for instance
on a blade serving as a doctor element for the coating
mixture, the front end of the joined paper web causes a
heavy jolt on the blade. Furthermore, a certain,
although small, sump of coating mixture also is created
at this point, tending to contaminate subsequent rolls,
reversing rollers etc.
The problem underlying the invention is to propose a
splice and an adhesive tape which makes it possible to
make a web splice without the aforementioned
disadvantages, where specifically only a slight jolt and
,v ,o
. 20 39 631
2
a low joint edge of the web are supposed to be given at a
future slicing of the running web(s).
It is therefore an object of the present invention
to obviate or mitigate the above disadvantages.
According to one aspect of the present invention
there is provided a splicing tape to overlap adjacent
ends of a pair of webs, said tape having oppositely
directed surfaces with an adhesive on one of said
surfaces for adhering to said adjacent ends, an adhesive
strip located on the other of said surfaces to provide a
pair of oppositely directed adhesive faces, one of said
faces being adhered to said other surface and the other
of said faces being directed away from said other surface
for engagement with a subsequent portion of one of said
webs. Preferably said other face has a significantly
greater adhesion than said one face whereby, after
engagement with said subsequent portion, said strip will
remain adhered to said subsequent portion and separated
from said other surface.
2o According to another aspect of the present invention
there is provided an adhesive tape for making a web
connection to a paper roll, comprising:
a tape member having a front side and a back side,
and having respective longitudinal edges, said front side
of said tape member including either an adhesive layer or
two mutually parallel adhesive layers separated from each
other by a narrow space, said adhesive layer or layers
~ 2039631
3
supporting a cover foil comprising cover foil members,
said cover foil members being separated by a longitudinal
seam or by said space; and
at least one adhesive strip having two sides and
having an adhesive layer on each of said sides, said
adhesive strip being adhered to said back side of said
tape member by the adhesive layer of one said sides of
said strip, wherein the adhesion of the side of said
adhesive strip adhered to the back side of the tape
member is weaker than the adhesion of the other side of
said adhesive strip, said adhesive strip extending
parallel to said longitudinal edges of said tape member.
According to a further aspect of the present
invention there is a leader for a rolled web of material
having a splicing tape secured thereto for connection to
another web of material, said tape having a pair of
opposite surfaces with an adhesive on one of said
surfaces, a portion of said one surface being adhered to
a terminal zone of said web with another portion thereto
carrying a removable cover to inhibit adhesion to said
web, another of said surfaces carrying an adhesive strip
having one adhesive face adhered to said other surface
and another of said adhesive faces adhered to a radially
outwardly directed surface of said web spaced along said
web from said terminal zone.
A favourable process for making a splice at the
leader of a paper roll using adhesive tapes of the
present invention is characterized by the following
_ ~ ZO 39 631
4
features: (a) the web leader is kept distant from the
paper roll, for instance by forming a loop which is
temporarily fixed on the paper roll at the edge of the
leader; (b) the adhesive tape is applied either on the
loop, after removal of a cover foil, with the adhesive
layer corresponding to the cover foil, or the adhesive
tape is applied on a spot of the paper roll exposed
through the removal of the web leader, with the adhesive
layer of the adhesive strips or corresponding adhesive
films, as well parallel to the axis of the paper roll;
(c) facultatively upon elimination of the loop or removal
of the cover foil closer to the exposure spot of the web
leader from the paper roll, the paper roll and web leader
are taped together while the web is wound taut; and (d)
the overhang tail of the web leader, at the joint of the
removed cover foil toward the remaining cover foil of the
one web side, is detached, preferably by tearing it off
by hand.
A favourable device for making a splice is also
described. A device, specifically a paper roll carriage
provided with it, is provided for application of an
adhesive tape on the web leader of a paper roll or on the
paper roll parallel to its center. A guide rail
extending parallel to the paper roll is provided, having
a guideway for a cassette or unwinding device containing
the adhesive tape roll.
4A t, 2 0 3 9 6 3 1
In another embodiment, the invention provides a process for making a
splice for a web leader and a paper roll using a double-stick adhesive tape,
15 wherein said adhesive tape comprises a tape member having
a linear set of first perforations extending genefally
therethrough in a center area thereof whereby said first
perforations comprise a first longitudinal seam, said
tape member having a front side and a back side and having
20 respective longitudinal edges, each of said sides of said
tape member having an adhesive layer thereon, wherein
said adhesive layers are covered by respective cover
foils, wherein on at least one side of said first
perforations on the front side of said tape member the
25 adhesive layer is subdivided into two parts by second
perforations parallel to said longitudinal edge, and
wherein said second perforations comprise a second
longitudinal seam, said second longitudinal seam being
perforated to a lesser degree when compared to said first
longitudinal seam and wherein the adhesive layer on said
back side comprises a plurality of adhesive strips
disposed generally parallel to said 2ongitudinal edges,
one of said adhesive strips on saic'_ back side being
situated generally adjacent a longitudinal edge, and
another of said adhesive strips on said back side being
situated generally adjacent said first perforations , said
process comprising:
maintaining initially a fixed distance between
said web leader and said paper roll by forming a loop
whereby said loop is temporarily fixed on said paper roll
-- ~ 2039631
4B
at an edge of the web leader;
removing the cover foil from the adhesive layer
15 on one side of said first perforations on the front side
of the tape member so that an adhesive layer is exposed
with an adhesive strip being located on the back of the
same side of the adhesive tape along a longitudinal edge
thereof whereby said adhesive tape is affixed by adhesion
20 to an exposed portion of said paper roll at the uncovered
portion of said adhesive surface;
removing said adhesive tape with its part not
glued in place and, by means of said adhesive strips on
said back side, affixing by adhesion one on top of
25 another with its two parts back to back;
removing the cover foil contained on the front
side of said tape member and which to the separation
point of the web leader is kept distant from said paper
roll is closer than the other cover foil on said front
side;
affixing by adhesion the last winding of said
roll on the adhesive surface that has been exposed last;
and
separating an overhang tail portion of said web
leader on the edge of the last exposed adhesion spot or
at the joint toward the remaining cover foil.
x.2039631
Brief Description of the Drawing's
The above mentioned and other features and objects
of this invention, and the manner of attaining them, will
become more apparent and the invention itself will be
5 better understood by reference to the following
description of embodiments of the invention taken in
conjunction with the accompanying drawings, wherein;
Figure 1 shows an elevation of a splicing tape;
Figure 2 shows a side elevation of a paper roll with
the tape of Figure 1 attached at one end;
Figure 3 shows the tape of Figure 1 connecting
adjacent webs in the vicinity of a subsequent coating
blade of a coater;
Figure 4-7 show alternative embodiments of splicing
tape formations, such as in Figure 1, each in a view
transverse to the longitudinal expanse of the tapes;
Figure 8 shows a view transverse to the axis of the
paper roll, of the area of the web leader;
Figure 9 shows a splicing operation on a rewinding
device;
Figure 10 shows a paper roll carriage with a guide
for a cassette containing an adhesive tape;
Figure 11 shows a detail concerning the mounting, in
plan view;
Figure 12 shows essentially an elevation of the
former, partly in section according to the dashed, heavy
line in Figure 11;
B'
._ ~ 2039631
6
Figure 13 shows a holder and sliding device for
guiding the end of the paper web and its application on
the paper roll;
Figure 14 shows another detail of this device;
Figure 15, another holder device of this type, in
plan view;
Figure 16 shows a detail of the glued joint on the
end of the paper web relative to Figure 13; and
Figures 17 and 18 each show automatic gluing devices
in other embodiments, similar to Figure 13.
Corresponding reference characters indicate
corresponding parts throughout the several views. The
exemplifications set out herein illustrate preferred
embodiments of the invention, and such exemplifications
are not to be construed as limiting the scope of the
invention in any manner.
Description of the Preferred Embodiment
In Figures 1 and 4 through 6, the adhesive layer is
indicated by dashed line. Corresponding or similar
components, for instance cover foils, are signified in
the various drawings using the same reference symbols,
but with a varying number of prime signs.
Referring therefore to Figure 1 a splicing tape 1
consists of a backing 2 having an adhesive layer 3 on one
of the oppositely directed faces 2a, 2b of the backing 2.
Cover foils 4 and 5 separated from each other by a
longitudinal seam 9 cover and adhere to the adhesive
layer 3. A further, narrow, double-stick adhesive strip
E 2039fi31
7
(also adhesive tape) 7 is located adjacent the edge of
layer 2 and has a pair of oppositely directed adhesive
coatings 7a,7b. The coating 7a secures the strip 7 to
the layer 2 and the coating 7b is covered with another
cover foil 8 as shown. The adhesive strip 7 may
alternatively be formed by a number of adhesive dots or
adhesive areas.
The adhesive force of the adhesive coating 7b of the
adhesive strip 7 contained underneath the cover foil 8 is
considerably greater than the adhesive force of the
adhesive coating 7a on the other side of this adhesive
strip 7.
As illustrated in Figure 2, the splicing tape 1 is
attached initially to the "end" C of the paper web that
forms the "leader" of the paper roll A.
The splicing tape 1, is tacked onto the paper web
end C of the paper roll A, on the side of the web facing
toward the interior of the paper roll A and also engages
the web onthe outward-facing side B of the same lap of
the paper web. This may be accomplished by, e.g.,
manually flapping the end of the paper web C back into
the dashed position shown in Figure 2 (loop G), in which
this end is temporarily fastened on the paper roll with
adhesive pieces (P). With the arrangement according to
Figure 2, therefore, the cover foil 5 is initially pealed
off on the one side of the adhesive tape 1 and the layer
2a applied to the web C. The foil 8 is then removed and
C
._ ,,~ 2 0 3 9 6 31
8
the loop G released to bring the layer 7b into contact
with the outer surface B of the web C.
With the adhesive strip 7 web end C of the paper
roll being fastened, as shown in Figure 2, the adhesive
strip 7 adheres more so to the paper roll B than to the
adhesive tape 1. Thus as the web end C is torn off due
to the traction of the old web when splicing the two
webs, the strip 7 remains adhered to the surface B rather
than to make the joint between adjacent ends of webs, as
shown in Figure 3, the cover foil 4 is pulled off the
adhesive tape 1. This enables at this point the
connection of the web end C with the old web D. The
arrows in Figure 3 indicate the running direction of the
web. It is also evident from Figure 3 that the narrow
adhesive strip 7 still clings to the paper roll at the .
location spaced from the adhesive tape 1. Conveniently,
at that point, a reinforcement tape 70 is additionally
taped on the paper roll although, however, it may often
also be omitted.
The adhesive strip 7 (also 6, 10, in Figure 4; 11,
in Figure 5) follows the splice at the distance of a
paper roll circumference and thus, as the case may be,
can remove paper web remnants that may have remained back
on the doctor element and are created as the old paper
web is pulled off its core, which is very important for
the quality of the applied coating.
The splice between the webs C, D is thus made with a
single sided tape overlapping the two ends. This keeps
.. 9 ~, 2039631
the thickness of the joint at the doctor element (coating
blade S) of Figure 3 low. Hence, also only a very slight
amount of coating mixture can accumulate at the joint.
The adhesion provided on the strips 7, each of which
may also be a sole adhesive layer, will preferably be
made less on the side facing the adhesive tape 2, etc.,
than on the other side. To that end, the adhesive
surfaces on both sides may be varied in size, with
adhesive having equal adhesion per unit area on both
sides.
In some cases, a splicing tape 1 as described above
may not be available, but it is possible to fabricate
such a tape for making a splice as proposed and described
hereafter in detail using various tape formations. In
this case, the adhesive strip 7 may also be an
appropriately wide adhesive film.
As stated above, the leader of the new paper roll A
is folded over to a loop G and taped in place on the
paper roll using small adhesive tape pieces P. The
cover foil 5 of splicing tape 2 is then removed and the
backing layer 2 is taped with its adhesive surface 2a
down on the leader C, parallel to the axial web edge
(leader = front web end). Next, a narrow double-stick
adhesive strip 7 with cover foil 8 according to Figure 1
is affixed on the surface 2b of the adhesive tape 2 here,
for instance on the unaffixed end (since the cover foil 4
is still contained there) in the area of the longitudinal
web edge. All this may be performed manually or also by
r, 2039631
to
means of an unwinding device for tape which is installed
on a rail that is parallel to the paper roll as will be
explained more fully below. The expression "narrow
adhesive strip" (or adhesive film) means here that it
does not have the full width but, e.g., only a width of
maximally 80% of the width of the backing layer 2, etc.
In the context of the invention, "narrow" adhesive tapes
are recommended for splicing.
The embodiment of Figure 1 shows a single adhesive
l0 tape 7. However, other configurations of splicing tape
are feasible. According to Figure 4, the adhesive tape
2 may also be provided with several smaller adhesive
strips 6,7 at opposite edges and, if preferred,
intermediate the edges as indicated at 10. Each of the
strips 6,7,10 have respective cover foils 8, 8' and 8" on
their nonstick side.
Another tape formation is depicted in Figure 5,
where another adhesive tape 11 of the same width as the
adhesive tape 2' with cover foil 12 is applied on the two
marginal adhesive strips 6' and 7'. The cover foil 12
may additionally feature a separating point E, analogous
to the separating point 9 of the cover foils 4, 5, or
4',5'. The sections of the cover foil 12 can then be
pulled off successively and the adhesive tape 11, and
thus also the adhesive tape 2', and thus also the leader
C can be fastened firmly on the paper roll.
Figure 6 illustrates an adhesive tape with a double-
sided adhesive coating. It possesses on the one side, as
20 39 fi3~
11
described so far, the divided cover foils 4" and 5" and
on the other side a strip-shaped adhesive layer, such as
indicated by the dashed lines, with the individual film
strips covered each by a cover foil 71 through 74. When
firmly attaching the web leader C to the paper roll,
these cover foils can be removed successively and the
adhesive tape 2" fastened firmly on the paper roll.
This takes place, at a point where an additional
adhesive tape 70 as shown in Figure 8 is applied on the
next to the last lap of the paper roll. This is
preferably a single-sided adhesive tape 70' used when the
paper roll has in axial direction undergone a wavy
deformation and formed grooves, due to the effect of
moisture. In this case, the adhesive tape 70' adheres
strongly to the bumps in the paper roll A, and the narrow
adhesive strips 6,7 or 10 or the adhesive strips 11 (Fig.
5) or 2" (Fig. 6) adhere then very well to the outer
surface of this additional adhesive 70'.
Taped directly on the wavy paper roll, the
additional tape 70' is relatively wide, as is evident
from Fig. 8, allowing all of the narrow adhesive strips
6,7 to adhere to it. This additional adhesive tape 70',
like the tape 70 shown in Figure 3, has an adhesive layer
of a very high adhesive strength so that in the splicing
process, in which the leader of the new web, that is the
paper roll A, is connected with the old web D at a high
speed, this additional adhesive tape including the narrow
__ x.2439631
12
adhesive strips 6,7 will continue to stick to the paper
roll, and thus separate from the backing layer 2".
Indicated in Figure 7 is additional a variant of the
adhesive tape formation shown in Figure 5, where an
adhesive tape twice as wide is used. In the center there
is provided a heavy perforation H, so that the tape
formation according to Figure 5 can be obtained by
folding over in the direction of arrow F. To that end,
the small adhesive strips 6' and 7' are suitably provided
here also, as indicated in Figure 7. This backing layer
2" is provided on the adhesive surface 2a " ' with cover
foils 4',5'; 4 " ',5 " ' that are subdivided in
longitudinal direction, as indicated. Thus, also the
design of the cover foils corresponds in this case to
that according to Figure 5 with the foils 4 " ', 5 " '
providing the layer 12.
It will be noted that relatively large adhesive
areas are located under the cover foils 4, 5, 4', 5' or
4", 5" in order to later, in the splice device (for so-
called "flying splices"), splice the running webs
flawlessly.
Any protruding tail 90 (Figure 2) of the paper
leader C that is created when the splicing tape 1 is not
affixed exactly aligned on the otherwise absolutely
straight axial web edge can be retroactively detached,
for instance simply torn off by hand, along the bordering
axial edge of the remaining foil 4, 4'.
~1
13 2039631
It is conceivable that the tape configurations
according to Figure 1 and 4 through 7 can be manufactured
and thus be commercially available. In this case, the
process described so far is simplified, as will be
described hereafter.
To achieve the arrangement shown in Figure 2, the
splicing tape 1 is not affixed to the loop G, but
directly to the paper roll A on the surface B by means of
the narrow adhesive strip 7 or in case several are
available with the adhesive strips 7, 8 or 10 or with
appropriate adhesive films applied on the backside of the
adhesive tape 2. Cover foils 8, 8' or 8 " that are
present, naturally, are removed previously. The loop G
that is formed to access the surface B is sufficiently
large so that the.web leader c, upon elimination of the
loop, can still be brought into contact with distant
adhesive surface under the cover foil 5, according to
Figure 2. Any excess will protrude as a "tail" 90 which
then is preferably removed by hand along
the edge of the adhesive layer or the still present cover
foil 4. This makes for a very simple process of making
the splice, without requiring expensive mechanisms.
Naturally, it is possible to provide a simple device with
a linear guide for affixing the adhesive tapes to the
paper roll. Also, making a loop G may be omitted,
permitting the loose web end simply to hang down
vertically according to Figure 2.
203963
14
However, Figure 2 indicates by broken line that the
tape 1 may also be attached to the loop G from outside.
Figure 9 shows basically how the process just
described can also be applied very well in a rewinding
device for a paper roll, by stopping the new paper roll
(i.e., naturally, at the same time also the old one) in
the rewinding process. The splicing tape 1 or one of the
other configurations according to Figures 4-7 is then
glued in the last described way, so to speak with the
"backside" on the paper roll, as indicated by arrow 1.
The front side is then that which preferably contains the
continuous adhesive layer with the cover foils 4 and 5 or
4' and 5' or 4" and 5" . The one cover foil . in t-ha
examples always 5 or 5' or 5 " , is first separated.
Next, the paper roll is rotated in the direction of
rotation as indicated by the arcuate arrow until the web
1 has passed the squeeze point in the press gap between
the press roll 71 and the paper roll. During this
passage, the future web leader C is attached to the paper
roll A by means of the adhesive tape 1. The new paper
roll can then be separated from the old paper roll 73
with the cutter, as indicated at 72, previously or only
subsequently. The overhang "tail" of the new paper roll
A is then, as described above, separated along the joint
of the cover foils 4 and 5, preferably by hand. As said
before, the cover foil 4 remains generally still on the
adhesive tape, since that foil is separated only when
making the final splice in processing the paper roll.
203963'~~
This process, as the case may be, may also be
modified in that the adhesive tape is applied with the
front side, i.e., after removal of the one cover foil
part 4 or 5, 4' or 5', 4 " or 5 " , on the web end in the
5 area of the contact roll 71, in that then, as the case
may be, the cover foils 8, 8', 8 " of the smaller
adhesive strips 6 or 7 or 10 are pealed off and the tape,
and thus the web end, i.e., actually the new web leader
C, is taped to the new paper roll A by means of these
10 adhesive strips, which may be accomplished in that the
new paper roll A is rotated somewhat in the direction of
winding, so that the adhesive tape will pass the squeeze
point between the contact roll 71 and the new paper roll
A.
15 To facilitate attachment of the splicing tape 1,
conventional equipment may be modified as described
below.
Figure 10 is a basic sketch of a paper roll carriage
80 where on a frame 81 a support plate 82 is provided for
the shaft 83 of the core 84 of the paper roll A. Mounted
on the frame 81, on both sides of the paper roll A, is a
console 85 which is perpendicular to the paper roll axis
or peripheral surface of the paper roll A and essentially
horizontal. The console is shown supported by a holder
strip 87 featuring a guide in which the console 85 can be
moved vertically. The console 85 supports a guide rail
86, which is, movable in horizontal direction in guides
88. A cassette or other unwinding device for adhesive
C
._ 2039fi31
16
tapes or adhesive strips can be mounted for movement
along the axis of the paper roll A, on the guide rail 86.
For the guide rail 86', as indicated by broken line,
there may also be provided an essentially radial console
85' arranged relative to the paper roll axis, on both
sides of the paper roll on the paper roll carriage. Not
illustrated here is that the cassette or the unwinding
device for adhesive tapes may be mounted on the guide
rail 86 by means of a springed holder, i.e., that the
cassette, for instance, might be connected by way of a
spring arrangement with a slider block running in the
guideway 89 of the guide rail 86.
As illustrated in Figure 11 and Figure 12, the
cassette K can be retained in the guide rail 86 by means
of a slider 91 and a holder rail 92 and run along the
guide rail 86. The holder rail 92 is fastened on the
slider through springs 93 and bolts 94. The bolts 94 are
threaded bolts, thus making it possible to exchange the
holder rail 92 including the cassette for a specific
cassette width. Serving that purpose is a holder plate
95 which can be fastened on the holder rail 92 by means
of wing nuts 97. Also illustrated is that during the
unwinding of the adhesive tape the cover foil 5 can be
separated from the adhesive tape roll R by means of a
narrow, thin strip 96.
Figure 13 illustrates a device for facilitating the
attachment of the adhesive tape 1 to the end C of the
web. There is a pivoting frame 22 provided which on its
c
~~ 203963'
17
upper end supports a guide and retaining roll 13 that is
mounted in bearings 33. This retaining roll is a hollow
cylinder with shell bores which connect to a vacuum,
relative to the atmosphere, which is to be generated
inside the retaining roll 13. The web C is held thereby
on the retaining roll. Below the retaining roll 13, a
worktable 14 is mounted on a lever 15 that pivots about a
pivot 20 and supports a tabletop 16. The pivotal lever
can be swivelled by a hydraulic jack element 29, through
l0 the intermediary of its ram 30, in the position
illustrated by broken lines, in which the tabletop 16
bears on the shell surface of the retaining roll 13. The
hydraulic jack element 29 is mounted on a bearing device
32 in the swivel frame 22. The latter, in turn, is
swivelable by means of a hydraulic jack element 21 which,
for one, is mounted on a base 19 by means of bearing
element 24 and, for another, by means of a bearing
element 23 on the swivel frame. The latter, in turn,
pivots about the bearing point 27 on the base 19.
Figure 14, enlarged, illustrates the worktable 14
with the tabletop 16. The latter features a number of
holder elements (holder pins) 25 with the aid of which it
is possible to align the adhesive strip pieces on the
tabletop 16. Additionally, the tabletop features bores
26. The worktable 14 being fashioned as 60 a hollow box
which by means of connection 41 can be subjected to a
vacuum relative to the atmosphere, this vacuum becomes
effective through the bores 26, retaining the adhesive
C
~.2~39631
18
strip pieces on the tabletop 16, so that, as the latter
pivots toward the retaining roll 13, these pieces do not
drop of f .
The adhesive tape, i.e., the pieces of adhesive
tape, that are placed on the worktable accord to the form
of Figure 1 and thus are applied on the end of the web C
as the worktable 14 swivels up. As the guide and
retaining roll 13 and the paper roll A, respectively,
rotate, the end of the paper web C is guided in the
attachment position relative to the paper roll A. In the
process, the cover foil 8 of the narrow adhesive strip 7
is previously removed.
It will be noted in Figure 14 that the tabletop
features a tearing edge 18 that corresponds to the splice
edge of the web end C. In the dash-dotted position of
the worktable 14 according to Figure 14, this edge can be
produced by tearing the excess paper of the web end off.
The pins 25 and bores 26 maintain the adhesive strips
aligned with the serrated edge.
Naturally, also other accessory devices are may be
utilized which enable the separation of the web in the
illustrated form.
Figure 16 shows the position of the adhesive tape 1
where it has been taped by the worktable 14 to the web
end of Figure 4. Figure 15 depicts a device of the guide
roll 13 which does not feature the worktable 14 according
to Figure 13. Instead, a fixed worktable 17 is provided
that is fastened on the swivel frame 22'. The adhesive
r7
19 x.2039631
tape 1 or pieces thereof are applied here directly on the
end of the web C by hand.
In Figure 17, the worktable 15 is fashioned as a box
with an approximately quadratic cross section. The
tabletop on which the adhesive strips are placed is
marked 16'. The interior of the box is hollow and
preferably kept at a vacuum relative to the atmosphere,
or at least partly, at any rate in the area where the
table top 16' is located. To that end, a connection 41
similar to the design of the embodiment relative to
Figure 14 is to be provided (here marked 41'). Bores 26
as in the embodiment according to Figure 14 are provided
as well in the work surface. For an indented splice
according to Figure 14, the fixing pins 25 need to be
provided as well, which, naturally, must be retractable
in design, for instance through spring-loading.
The paper web hangs with its end, according to the
broken line, over the retaining roll 13. To begin with,
the worktable 50 is swivelled in a position in which the
cutting edge 54 clips the paper web along an intended
splicing edge. For that purpose, the shell surface of
the retaining roll 13 is preferably rubber-coated. The
adhesive strips which have been placed on the worktable
16' are retained by the vacuum and, upon retraction of
the worktable 50 by means of swivel arm 15', rotated in a
position in which the work surface 16', as illustrated in
the figure, is exactly opposite the retaining roll 13.
The adhesive strip can then be attached, through a
f 20 39 63?
controlled swivel movement of the worktable 50, also in
zig-zag shape to the end of the paper web. This swivel
movement can be accomplished either through a stepping
motor or by means of hydraulic elements in keeping with
5 the elements 21 and 29 according to Figure 13, with the
aid of limit switches. The swivel frame corresponds
essential to that of figure 13 and is marked 22 " here.
In Figure 18, the worktable is fashioned as roll 52
formed by a hollow cylinder. It also features a cutting
10 edge 54. The work surface should be conceived in a
position comparable to the worktable in Figure 13. Here,
too, the roll 52 forming the worktable must feature a
swivel or rotary drive for a specific swivel or rotary
motion.
15 The bending resistance moment of the retaining roll
13 is preferably considerably greater than that of the
worktable 16, 50 or 52.
While this invention has been described as having a
preferred design, the present invention can be further
20 modified within the spirit and scope of this disclosure.
This application is therefore intended to cover any
variations, uses, or adaptions of the invention using its
general principles. Further, this application is
intended to cover such departures from the present
disclosure as come within known or customary practice in
the art to which this invention pertains and which fall
within the limits of the appended claims.
