U.S. patent application number 10/488133 was filed with the patent office on 2005-01-13 for machine-detectable adhesive tape.
Invention is credited to Burmeister, Axel, Eikmeier, Markus, Gassner, Thomas, Gebbeken, Bernhard, Nagel, Christoph.
Application Number | 20050006520 10/488133 |
Document ID | / |
Family ID | 8164569 |
Filed Date | 2005-01-13 |
United States Patent
Application |
20050006520 |
Kind Code |
A1 |
Gassner, Thomas ; et
al. |
January 13, 2005 |
Machine-detectable adhesive tape
Abstract
The invention relates to an adhesive tape for a flying reel
change of a flat material wound up over a reel, provided with at
least one detachable adhesive system. The invention is
characterized in that the adhesive tape is provided with at least
one device which can be detected by an optical detector.
Inventors: |
Gassner, Thomas;
(Heidgraben, DE) ; Eikmeier, Markus; (Lensahn,
DE) ; Gebbeken, Bernhard; (Hamburg, DE) ;
Nagel, Christoph; (Hamburg, DE) ; Burmeister,
Axel; (Buchholz, DE) |
Correspondence
Address: |
NORRIS, MCLAUGHLIN & MARCUS, PA
875 THIRD STREET
18TH FLOOR
NEW YORK
NY
10022
US
|
Family ID: |
8164569 |
Appl. No.: |
10/488133 |
Filed: |
July 22, 2004 |
PCT Filed: |
August 29, 2001 |
PCT NO: |
PCT/EP01/09957 |
Current U.S.
Class: |
242/555.3 ;
242/554.4; 242/556.1; 242/563 |
Current CPC
Class: |
B65H 2301/46078
20130101; B65H 2511/212 20130101; B65H 2511/512 20130101; B65H
2301/4607 20130101; C09J 7/21 20180101; C09J 2400/283 20130101;
C09J 2203/342 20130101; B65H 19/102 20130101; B65H 2511/212
20130101; B65H 2220/01 20130101; B65H 2511/512 20130101; B65H
2220/01 20130101 |
Class at
Publication: |
242/555.3 ;
242/556.1; 242/563; 242/554.4 |
International
Class: |
B65H 019/18 |
Claims
1-6. (Cancel)
7. An adhesive tape for the flying reel change of flat web material
wound up on reels, said adhesive tape comprising at least one
cleavable adhesive system wherein the adhesive tape comprises at
least one device which can be detected optically by means of a
detector.
8. The adhesive tape as claimed in claim 7, comprising at least one
main carrier, at least one layer of a self-adhesive compound on a
top side thereof and at least one cleavable adhesive system on a
bottom side thereof.
9. The adhesive tape as claimed in claim 8, wherein the main
carrier has at least one optically detectable layer.
10. The adhesive tape as claimed in claim 7, wherein said device
comprises bar codes, optically reflecting systems, diffraction
gratings, holograms, defined colorations or a combination
thereof.
11. A method for splicing for the flying reel change of flat web
material wound up on reels, the method comprising: a) providing the
adhesive tape according to claim 8; b) adhering an uppermost paper
web of a new reel to a web lying underneath with the adhesive tape;
c) exposing part of the self-adhesive compound necessary for the
splicing process; d) placing the new reel beside an old reel which
has been unwound and is to be replaced; e) accelerating the new
reel to substantially the same rotational speed as the old reel; f)
pressing the new reel against the old reel, wherein the exposed
self-adhesive compound of the adhesive tape bonds adhesively to the
uppermost paper web of the old reel at substantially the same
speed, while at the same time, cleaving said cleavable adhesive
system in such a way that, following the cleaving, no adhesive
regions are exposed; g) determining the time of the splicing by the
detector, wherein the adhesive tape or at least a part thereof is
detected optically by the detector.
12. A method according to claim 11, wherein the main carrier has at
least one optically detectable layer.
13. A method according to claim 11, wherein the detecting is
achieved by means of bar codes, optically reflecting systems,
diffraction gratings, holograms, defined colorations or a
combination thereof.
Description
[0001] The invention relates to an adhesive tape for a flying reel
change of flat web material wound up on reels, equipped with at
least one cleavable adhesive system, and to a splicing method for
the flying reel change of flat-web material wound up on reels.
[0002] The flying reel change is a familiar method in paper mills
or the like of replacing an old paper reel which has virtually been
unwound by a new one without having to stop the high-speed
machines. The end of the old paper web is in this case adhesively
bonded to the start of the new paper web, in order to ensure
operation which is as continuous as possible. For this purpose, use
is made of double-sided self-adhesive tapes, that are known as
tabs, which are firstly highly adhesive and tacky but secondly, on
account of their water-soluble self-adhesive compounds and paper
carriers are not disruptive when the paper waste is reused in the
papermaking machine. Classically, the tabs are stuck to the web
start manually; this process requires the use of specialist
personnel and leads to results which are technically not
advantageous, since the adhesions are relatively thick as a result
of the sequence of paper webs and adhesive strips. Diverse products
can be obtained for the adhesion during a flying reel change, in
particular those which, in addition to a paper carrier, have a
water-soluble self-adhesive compound coated on both sides.
[0003] EP 418 527 A2 discloses a method of preparing a printing
material web reel in a reel changer of a rotary press, in which
adhesive strips are used which are subdivided into three zones
(column 3, line 12 ff. and FIGS. 1 and 2), the central zone 6 being
perforated. Tearing then takes place at this perforation.
[0004] However, in practice adhesive tapes of this type have
serious disadvantages, in particular as a result of the adhesive
areas which are present after the splice.
[0005] However, DE 196 28 317 A1 has also already disclosed
adhesive tape for such applications in which, after the splice has
been carried out, adhesive areas no longer occur, use being made
there of a cleavable paper carrier, which cleaves during the splice
and, after the splice has been carried out, covers the adhesive
compounds. DE 196 32 689 A1 also discloses a similar adhesive tape
for this application, but here a cleavable paper carrier is used,
which cleaves over the entire width of the adhesive tape.
[0006] The non-adhesive covering of adhesive regions which are
otherwise open is disclosed by DE 196 32 689 A2. Here, an adhesive
tape for dynamic loadings during the splicing process is described,
whose paper carrier cleaves and covers the adhesive compounds with
its residues.
[0007] DE 198 30 673 shows an adhesive tape for the flying reel
change in paper conversion machines or the like, which has a paper
carrier coated on both sides with a water-soluble self-adhesive
compound. An edge region of the rear of the adhesive tape is
equipped with a single-sided adhesive tape which, for its part, has
a cleavable paper carrier.
[0008] A further variant is described in DE 198 30 674. Here, an
adhesive tape with two cleaving strips is illustrated.
[0009] DE 199 02 179 A2 also shows an adhesive tape for a splicing
method. On its non-adhesive rear, this adhesive tape bears a
double-sided adhesive tape which has a cleavable paper carrier,
cleaves during the splicing method and covers the respective
adhesives. In order to avoid tears during the flying reel change,
the laminated adhesive tape with a paper carrier of cleavable paper
is arranged to be moved in, specifically at a certain distance from
the longitudinal edge of the adhesive tape.
[0010] It is an object of the invention to provide an adhesive tape
and a splicing method which does not exhibit the disadvantages of
the prior art, or only to a reduced extent, and which permits
automated control of the splicing method.
[0011] This object is achieved in a manner that is surprising and
cannot be foreseen by those skilled in the art by an adhesive tape
as represented in the main claim, and by a method as represented in
claim 5. The subclaims relate to advantageous embodiments of the
inventive adhesive tape and further developments of the inventive
method.
[0012] In accordance with that stated above, claim 1 relates to an
adhesive tape for the flying reel change of flat web material wound
up on reels, the adhesive tape having at least one cleavable
adhesive system. According to the invention, this adhesive tape is
equipped with at least one device that can be detected optically by
means of a detector.
[0013] The invention therefore provides an adhesive tape which has
integrated in it the function of the signal label otherwise stuck
on later.
[0014] Use is very advantageously made of an adhesive tape which
has at least one main carrier with at least one layer of a
self-adhesive compound on the top. On the bottom of the adhesive
tape there is the cleavable system, preferably in the form of a
strip of a cleavable system, which is likewise equipped to be
self-adhesive on the open side. During the splice, this cleavable
system cleaves in such a way that no adhesive residues remain and
hamper the passage of the splice through the machine.
[0015] For the structure of the label according to the invention,
in principle use can be made of all adhesive tapes which can be
used for the flying reel change ("Easy Splice"). For example,
reference should be made here to DE 196 28 317 A1, (DE 196 32 689
A1), DE 198 30 673 A1, DE 198 30 674 A1, DE 198 41 609 A1, DE 199
02 179 A1, EP 0 757 657 B1.
[0016] In a preferred expansion of the invention, the main carrier
of the adhesive tape is equipped in such a way that it is used for
the machine detection. In a particularly advantageous embodiment of
the invention, the main carrier has at least one layer that can be
detected optically. This is preferably on the top (outer) side of
the carrier, that is to say on the side of the self-adhesive
compound, in order to be accessible to the detector.
[0017] The detectors which can be used are optical reading systems,
for example scanners. In this case, detection takes place without
contact. The optically detectable devices can be, for example, bar
codes, which can be read with a laser. When bar codes are used, in
addition to the actual detection action, additional information can
be transmitted, for example statements about the type or web
thickness of the new reel. Thus, if reels of different type or
composition are used, the processing system can automatically be
adjusted to the new processing conditions without further external
control being required. This further results in the advantage that,
already at the preliminary stage of the actual processing, further
processes can be controlled by means of automatic detection of the
reels prepared in this way, for example the storage and the stock
keeping, the paper preparation or the like.
[0018] Optical reflectors or diffraction gratings which are fitted
in or on the main carrier of the adhesive tape function in a
similar way. These can likewise be detected optically without
contact and initiate the splicing operation. Use may advantageously
be made of adhesive tapes which are provided with at least one
hologram. These systems are advantageously read by using lasers. It
is also possible, for example, to use systems corresponding to DE
199 35 775 A1 with a polymer carrier in which, at points associated
with individual information units, atoms and/or molecules that
change the refractive index are introduced as a function of the
information to be entered. It is also possible to use information
carriers which have a plurality of plies of a polymer carrier,
through which it is possible to read from and, if appropriate,
write to a preselected polymer carrier ply, in this regard cf., for
example, DE 199 47 782 A1.
[0019] A further example of optically detectable devices is
specific colorations of the main carrier, which can likewise be
registered by suitable detection systems. Here, reference should be
made by way of example to systems corresponding to DE 199 32 902, a
polymer carrier and an additional layer being provided, and the
additional layer containing a dye and being capable of being
changed optically locally in order to store information.
[0020] The inventive adhesive tape is detected during the
acceleration of the paper reel and thus triggers the splicing
operation at the correct time. The inventive adhesive tape thus
performs functions which have previously been provided by
additional labels or markings. The labels previously used cause
sources of error, since the signal generator and the adhesive
splice tape have to be adjusted accurately to each other.
[0021] In previous methods, the detection is ensured as standard by
an aluminized label. In this case, there is the danger that the
label will be wrongly positioned, as a result of which several
problems can occur.
[0022] Firstly, the label can be stuck outside the detection field
of the detector. In this case, the reel changer does not detect the
splice and the reel change does not take place, that is to say the
machine has to be stopped, the paper has to be threaded manually
into the press.
[0023] Secondly, the distance between splice and aluminized label
must be defined accurately and also maintained accurately. If these
distances do not agree, the old paper web will be cut off either
too early or too late. In the event that it is cut off too early,
it can occur that the adhesion between the new reel and the web
running out has not yet taken place adequately, and a break then
occurs, which also results in machine stoppages again. If the old
web is cut off too late, the projecting paper residue, what is
known as the flag, is lengthened. Too long a flag can project out
of the paper web in the further processing process, such as the
printing, and can become caught on deflection rollers or in the
printing unit and thus lead to disruption or breaks.
[0024] Thus, firstly inaccuracies in the sticking lead to a
disrupted function, secondly malfunctions are based on the fact
that the signal label falls off or "slips" on the reel.
Furthermore, the signal label provides an additional adhesive bond
at which, in the event of partial separation of the label, adhesive
areas can be exposed in an uncontrolled manner and disrupt the
paper processing process, for example stick the paper together in
an uncontrolled manner.
[0025] As a result of the integration of the switching function
directly into the adhesive splicing tape, the splicing reliability
could be increased considerably as compared with the previous
procedure, substantially fewer malfunctions were established.
[0026] An additional advantage of the invention is that information
can be passed on to the process control via the adhesive splicing
tape without contact, for example information about the current
rotational speed of the new reel. The invention therefore also
permits, in the event of malfunctions of the apparatus, for example
a new reel that is not running correctly (wrong speed, imbalance or
the like), the initiation of an emergency stop or introduction of
other measures to correct the error.
[0027] The main carrier used is preferably a tear-resistant paper
or film carrier. The following carrier materials may be listed here
by way of example: slightly creped papers, machine-glazed body
papers, one-sided coated smooth body papers, two-sided coated,
compacted, printable decorative papers, single-sided double
(twofold) coated, woodfree, highly glossy kraft papers, without
wishing to restrict the selection of the carrier materials
unnecessarily by these examples.
[0028] It should be pointed out that cleavable adhesive tapes in
the sense of DE 196 32 689 A1, in which the (main) carrier of the
adhesive tape itself cleaves, can also be used. In this case, the
cleavable carrier should then be configured to be detectable in
accordance with that stated further above.
[0029] Use is advantageously made of a cleavable system which has a
considerably lower cleavage strength than a paper carrier which has
to absorb tensile forces. The cleavable system or systems are
preferably based on sized highly consolidated paper, on a composite
of paper and film or on a composite of two films, it being possible
for the composite to consist of papers and/or films connected in a
defined point-like and/or linear manner. For this purpose, for
example, the following papers, paper composite systems or films are
particularly suitable:
[0030] easily cleavable paper systems, for example non wet-strength
papers
[0031] duplex papers
[0032] (papers laminated together in a defined manner, the cleaving
operation proceeds extremely homogeneously; no stress peaks arise,
for example as a result of inhomogeneous compaction. These papers
are used for the production of wallpapers and filters.)
[0033] highly consolidated papers glued together in a defined
manner (papers with a high cleavage strength).
[0034] The glueing can be carried out, for example, with starch,
starch-containing derivatives, wallpaper pastes based on methyl
cellulose (tesa.RTM. paste, tesa AG, Hamburg; Methylan.RTM., Henkel
KgaA, Dusseldorf) or polyvinyl alcohol derivatives.
[0035] Such systems are described, for example, in EP 0 757 657
A1.
[0036] cleavable systems in which the cleavage forces are
determined by the size of the adhesion points; such systems are
described, for example, in DE 198 41 609 A1.
[0037] coextruded films.
[0038] It is particularly advantageous if the cleavage strength of
the cleavable system is 5 to 70 cN/cm, in particular 12 to 60
cN/cm. In relation to cleavage strength and its measurement,
reference is made to DE 199 02 179 A1.
[0039] In a very advantageous embodiment, the distance (V) of the
double-sided adhesive tape (6) from the front edge (longitudinal
edge 14) of the main carrier is up to 15 mm, in particular 0.5 to
15 mm, preferably 1 to 7 mm, very preferably 1.5 to 3.5 mm.
[0040] If a plurality of cleavable systems is applied to the
adhesive tape, then the distance of the cleavable systems from one
another is advantageously 3 to 50 mm. Distances of 25 to 45 mm,
quite particularly distances of 30 to 40 mm, are selected.
[0041] The cleavable system or systems advantageously have the same
width as the main carrier. In a further beneficial embodiment, on
the other hand, it is advantageous if the main carrier is wider
than the cleavable system.
[0042] The width of the cleavable system is preferably 3 to 40 mm,
in particular 6 to 12 mm.
[0043] The amount by which the cleavable material is advantageously
moved in (distance V) in the region of the front longitudinal edge
14 is up to 15 mm, in particular 0.5 to 15 mm, preferably 1 to 7
mm, very preferably 1.5 to 3.5 mm.
[0044] In the case of a plurality of cleavable systems on the
adhesive tape, these can consist of the same material and thus
exhibit the same cleavage forces, but it can also be advantageous
to provide the cleavable systems from different material, so that
these possess different cleavage forces.
[0045] In a very preferred embodiment of the invention, the
self-adhesive compound used (in the sense of the self-adhesive
compound corresponding to item numbers 3, 8 and/or 9 of the
figures) is an acrylic contact adhesive compound. Both
water-soluble and water-insoluble acrylics can advantageously be
used.
[0046] Furthermore, natural and synthetic rubber compounds and also
dispersions of the abovedescribed compounds can also be used. It
should be pointed out that, in principle, all basic types of
contact adhesive compounds which meet the criteria according to the
invention can be used.
[0047] The self-adhesive compound 9 is very preferably colorless
and/or transparent, in order to maintain good transmissivity for
light.
[0048] In a further preferred embodiment, the self-adhesive
compound is provided with a covering which, if appropriate, is
provided with a perforation or a slit in the longitudinal
direction. The slit can preferably be provided at a distance A of
20 to 40 mm from the longitudinal edge 15 of the adhesive tape
which is opposite the front longitudinal edge 14, in the vicinity
of which the cleavable system 6 is arranged.
[0049] The adhesive tape is employed in reel changers in which the
splice detection is carried out without contacts. The adhesive tape
is preferably employed in methods as described in more detail in
the following text.
[0050] The invention relates further to a splicing method for the
flying reel change of flat web material wound up on reels, in which
the uppermost paper web of a new reel is fixed to the web lying
underneath with an adhesive tape, which is equipped with at least
one main carrier, at least one layer of a self-adhesive compound on
the top and at least one cleavable system on the bottom, and part
of the self-adhesive compound which is needed for the splicing
process is exposed, whereupon the new reel equipped in this way is
placed beside an old reel which has been unwound virtually
completely and is to be replaced, and is accelerated to
substantially the same rotational speed as the latter, is then
pressed against the old web, the exposed self-adhesive compound of
the adhesive tape bonding adhesively to the old web at
substantially the same speeds of the webs, while at the same time
the cleavable system cleaves in such a way that, following the
cleaving operation, no adhesive regions are exposed, and the time
of the splicing operation being determined by a detector and, in
particular, the adhesive tape or at least a part thereof being
detected optically by the detector.
[0051] In a further development of the inventive method, the
adhesive tape is stuck at right angles to the moving paper web. In
advantageous variants of the inventive method, adhesive bonding of
the adhesive tape can also be carried out at an acute angle of up
to 30.degree. with respect to the moving paper web, in particular
of up to 10.degree..
[0052] In the splicing method, an adhesive tape is stuck to a new
paper reel in a straight line under the uppermost web, so that part
of the adhesive tape remains free, while the underside of the
adhesive tape sticks to the web lying underneath and therefore
secures the uppermost web, if appropriate, initially only part of
the covering possibly located on the self-adhesive compound having
been pulled off, so that the part of the self-adhesive compound
which is needed for the splicing method is still covered by the
covering and, in this state, the reel has no free adhesive surface,
following which, for the final preparation for the splicing method,
the remaining covering which may possibly still be present is
removed, whereupon the new reel equipped in this way is placed
beside an old reel which has been unwound virtually completely and
is to be replaced, and is accelerated to the same rotational speed
as the latter, is then pressed against the old web, the exposed
self-adhesive compound of the adhesive tape bonding to the old web
at substantially the same speeds of the webs, while at the same
time the cleavable carrier of cleavable material cleaves and, with
its residues, covers both self-adhesive compounds which had been
coated onto it, in a non-adhesive manner.
[0053] Following the contact between the adhesive tape and the web
running out, cleavage of the cleavable system on the adhesive tape
therefore occurs, so that the uppermost paper layer of the new bale
is released and no more adhesive residues are present in exposed
form. In order to withstand the high temperatures and/or pressures,
use is preferably made of an inventive adhesive tape, that is to
say one such which has a particularly shear-resistant adhesive
compound for joining the paper webs.
[0054] In the following text, the invention is to be described in
more detail using an exemplary embodiment, but without wishing to
restrict it unnecessarily thereby. In the drawing:
[0055] FIG. 1 shows a lateral schematic view of an inventive
adhesive tape with an optically detectable carrier layer
[0056] FIG. 2 shows a lateral schematic view of an adhesive tape
according to FIG. 1, bonded to a paper reel and ready for the
flying reel change
[0057] FIG. 3 shows a view according to FIG. 2 but after the flying
reel change has been carried out.
[0058] In detail, FIG. 1 shows an adhesive tape 1 with a main
carrier 2, coated on one side with a water-soluble self-adhesive
compound 3. The main carrier 2 consists of cleavable smooth paper
which is provided with a bar code (optical device) (O). The total
thickness of the main carrier 2 with self-adhesive compound 3 is
0.088 mm, the width 150 mm.
[0059] The self-adhesive compound 3 is covered with a siliconized
release paper 4 which, at a distance of 30 mm from the left-hand
edge, is provided with a slit 5, so that the left-hand part 4a of
the release paper 4 can be removed first of all, and then the
right-hand part 4b. In the region of the right-hand end of the
adhesive tape 1, a strip of a double-sided adhesive tape 6 is stuck
underneath, consisting of a paper carrier 7 of cleavable paper
coated on both sides with water-soluble self-adhesive compound 8
and 9. The adhesive tape has a width of 9 mm.
[0060] FIG. 2 illustrates how such an adhesive tape 1 is stuck
under a paper web 11 of a new paper reel, specifically with the
left-hand part, after the part 4a of the release paper 4 has been
pulled off the latter. The adhesive tape has previously been stuck
with the exposed self-adhesive compound 9 onto the paper web 12
belonging to the paper reel and lying under the paper web 11. The
right-hand part 4b of the release paper 4 has also been pulled off,
so that the paper reel equipped in this way is ready for a flying
reel change, the bonding of the adhesive tape 1 running at right
angles over the reel.
[0061] The self-adhesive compound 3 is then exposed and, for the
flying change, constitutes the contact area with webs that are
running out. The contact area has a width of 120 mm and extends
over the entire width of the paper reel.
[0062] The (new) paper reel equipped in this way is brought
alongside the unwound (old) paper reel, to which the new is to be
attached. The new paper reel is accelerated to a rotational speed
which corresponds virtually to the speed of the web running out.
Once both speeds have been synchronized adequately, the change can
be completed. In the process, the splice is detected by means of a
scanner, which is located on the reel changer, and the position is
located exactly.
[0063] The web 13 that is running out is brought into contact with
the circumference of the new reel by means of a pressure shaft (not
illustrated) and the self-adhesive compound 3 is stuck to the paper
web 13 that is running out in accordance with FIG. 3. By means of
the scanner and the signal function of the bar code on the adhesive
tape, the exact time at which the paper web that is running out is
pressed against the new paper reel is determined, and cutting off
of the old paper web is controlled. Instantaneously after the
adhesive contact, the cleavable paper carriers 7 cleave in such a
way that one part 7a remains on the adhesive tape 1 and covers the
self-adhesive compound 8 there, while the other part 7b remains on
the self-adhesive compound 9 which sticks to the paper web 12.
Therefore, both self-adhesive compounds 8 and 9 are neutralized to
a certain extent, no longer stick and therefore cannot interfere in
the further process in the paper processing machines either.
[0064] The use of an inventive adhesive tape with integrated
switching function ensures stable detection without the application
of further labels. It is therefore always ensured that
identification of the splice is possible.
* * * * *