EP0454701A1 - Method and tape for joining paper webs - Google Patents

Method and tape for joining paper webs

Info

Publication number
EP0454701A1
EP0454701A1 EP90901588A EP90901588A EP0454701A1 EP 0454701 A1 EP0454701 A1 EP 0454701A1 EP 90901588 A EP90901588 A EP 90901588A EP 90901588 A EP90901588 A EP 90901588A EP 0454701 A1 EP0454701 A1 EP 0454701A1
Authority
EP
European Patent Office
Prior art keywords
tape
web
paper
adhesive surface
protective film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90901588A
Other languages
German (de)
French (fr)
Inventor
Sami PITKÄNEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Boston SpA
Original Assignee
Boston SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8527754&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0454701(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Boston SpA filed Critical Boston SpA
Publication of EP0454701A1 publication Critical patent/EP0454701A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/102—Preparing the leading end of the replacement web before splicing operation; Adhesive arrangements on leading end of replacement web; Tabs and adhesive tapes for splicing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F5/00—Attaching together sheets, strips or webs; Reinforcing edges
    • B31F5/06—Attaching together sheets, strips or webs; Reinforcing edges by adhesive tape
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/40—Adhesives in the form of films or foils characterised by release liners
    • C09J7/403—Adhesives in the form of films or foils characterised by release liners characterised by the structure of the release feature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/46—Splicing
    • B65H2301/4606—Preparing leading edge for splicing
    • B65H2301/4607—Preparing leading edge for splicing by adhesive tape
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/18—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet characterized by perforations in the adhesive tape

Definitions

  • This invention relates to a method for joining paper webs by means of tapes provided with a protective film, in accordance with which an adhesive surface of a first tape is exposed, said tape is attached substantially transversely to a first web at a distance from the end edge of the web so that it will extend from one longitudinal edge of the web to the other, the end portion of the web between the tape and the end edge of the web is removed, the same steps are repeated for a second web, and the junction point between the webs is covered with a second tape.
  • the invention also relates to a tape used in the method.
  • the joining is carried out with a two-sided tape.
  • a two-sided tape furnished with a protective film covering one side is fixed to the first paper web in the vicinity of the end edge thereof, whereafter the part of the web between the tape and the end edge of the web, the so called tail, is torn away by hand along the edge of the tape.
  • the protective film on the tape is removed and the other paper web is fixed on top of the tape and the end portion is torn away.
  • This known method has the disadvantage that the torn end edge of the paper web does not always exactly follow the edge of the adhesive surface of the tape, but the edge may have notches resulting from inaccurate tearing, on account of which some of the adhesive surface of the tape will appear. This will result in that the junction points on the paper web wound on a roll will adhere to the ply on top and the ply underneath. This can be prevented for the outer side of the junction by covering the junction with a one-sided tape, but a corresponding operation cannot be carried out on the lower side of the junction, since it rests against the previous ply on the roll.
  • the known method explained above has the disadvantage that the paper web will often adhere at the junction at least to the ply of the paper web underneath, wherefore the paper web may be broken when it is removed from the roll.
  • the junction point is also relatively thick, since there are superimposed therein two layers of paper and one or two layers of tape. The thickness of the web thus changes abruptly at this point, on account of which the printing roll may even be broken as a result of the impact thereupon.
  • the object of this invention is to provide a method for joining paper webs, wherewith a junction is produced which involves no danger of adhesion between the paper plies and which is still equally thin as, or thinner than, the junction produced by the known method.
  • the method of the invention is characterized in that both paper webs are fixed end to end onto the same side of the first tape and that the adhesive surface of the first tape is exposed in steps so that prior to the fixing of the tape to the first paper web a longitudinal adhesive zone having a width smaller than the width of the adhesive surface of the tape is exposed, and the remainder of the adhesive surface is exposed after the removal of the end portion of the first web prior to the fixing of the tape to the second web.
  • a butt joint covered on each side with one-sided tapes whose adhesive surface faces the paper is produced, and thus no outwardly exposed adhesive surfaces which could adhere to the other plies of the roll can be produced at the junction point. Furthermore, because of the butt joint between the paper webs the junction point is as thin as, or thinner than, the junction point produced with the previously known method, and the structure of the junction is gradually enlarging in thickness, wherefore the junction point will enter and leave the printing rolls softly.
  • the preferable procedure is that the adhesive zone located adjacent the longitudinal edge of the tape which is remote from the end edge of the first paper web is exposed first, and thereafter the adhesive zone adjacent the opposite longitudinal edge is exposed.
  • the invention also relates to a tape for joining paper webs, one side of said tape having an adhesive surface covered with a removable protective film.
  • the tape according to the invention is characterized in that the protective film comprises two longitudinal parts which can be separately removed from the adhesive surface.
  • the protective film for the -tape would be easily removable in two steps, according to one embodiment of the invention the protective film has a longitudinal slot or weakening line which separates the different parts of the film.
  • the parts of the film are substantially equally broad and that the combined width thereof corresponds to the width of the tape.
  • FIGS 1 to 6 illustrate the different steps of the method of the invention.
  • Figure 7 shows a cross-section of a produced junction.
  • Figure 8 shows a top view of a tape used in the method
  • Figure 9 shows a magnified cross-section of the middle portion of the tape.
  • the tape used in the method of the invention has been shown more closely in Figures 8 and 9.
  • the adhesive surface 2 of the one-sided tape is covered by parts 5,6 of the protective film, which in the shown embodiment are equally broad and whose combined width corresponds to the width of the tape 1.
  • Both the slot 9 and parts 5, 6 of the protective film are continuous in the longitudinal direction of the tape and extend to the edges of the tape.
  • the bearing layer of the tape is indicated with the reference numeral 10 in Figure 9.
  • the slot 9 may be replaced for instance by a weakening line or some other arrangement which makes it possible to remove the protective film in steps from the tape.
  • the tape need not be fixed exactly transverse to the paper webs, but often it is advantageous to fix it to the webs somewhat diagonally, as has been shown in the figures, whereby the impact on the printing roll is weakened.
  • the invention is particularly suitable for use in connection with thin and thick paper qualities, whereby the most suitable thickness for the bearing layer 10 of the tape is selected in view of the required tensile strength and the total thickness of the junction, but it can also be used in connection with other equivalent mater- ials.
  • the width of parts 5,6 of the protective film can be varied according to need.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Replacement Of Web Rolls (AREA)

Abstract

L'invention se rapporte à une méthode et à un ruban pour relier des bandes de papier. Lors de la production du papier, il peut arriver qu'une bande de papier soit déchirée ou coupée accidentellement, et dans ce cas les extrémités sont reliées au moyen d'un ruban. A l'endroit de la jonction connue, les extrémités des bandes se trouvent l'une sur l'autre, et un ruban à deux faces est placé entre celles-ci. Suite à des défauts de production, le papier ne recouvre pas toujours complètement le ruban, ce qui provoque le collage du papier par-dessus et par-dessous le point de jonction du rouleau, entraînant ainsi une rupture de la bande. On peut éviter cet inconvénient en utilisant un ruban à face unique (1) dont le film protecteur est divisé en deux parties (5, 6), ce qui permet l'utilisation d'un raccord bout-à-bout ne présentant aucun danger de collage.The invention relates to a method and a ribbon for joining strips of paper. During the production of paper, it can happen that a strip of paper is accidentally torn or cut, and in this case the ends are connected by means of a ribbon. At the location of the known junction, the ends of the strips are one on top of the other, and a two-sided tape is placed between them. Due to production faults, the paper does not always completely cover the ribbon, which causes the paper to stick over and under the junction point of the roll, thus causing the strip to break. This disadvantage can be avoided by using a single-sided tape (1), the protective film of which is divided into two parts (5, 6), which allows the use of a butt connection which presents no danger of collage.

Description

Method and tape for joining paper webs
This invention relates to a method for joining paper webs by means of tapes provided with a protective film, in accordance with which an adhesive surface of a first tape is exposed, said tape is attached substantially transversely to a first web at a distance from the end edge of the web so that it will extend from one longitudinal edge of the web to the other, the end portion of the web between the tape and the end edge of the web is removed, the same steps are repeated for a second web, and the junction point between the webs is covered with a second tape. The invention also relates to a tape used in the method.
After a paper web has been produced it will in general be immediately subjected to re-checks wherein for example holes and impurities are removed from the paper. Thereby the paper web is cut at the defective points and the end edges thus produced are joined together by means of at least one substantially transverse, self-adhesive tape.
According to the most often employed method, the joining is carried out with a two-sided tape. Thereby a two-sided tape furnished with a protective film covering one side is fixed to the first paper web in the vicinity of the end edge thereof, whereafter the part of the web between the tape and the end edge of the web, the so called tail, is torn away by hand along the edge of the tape. Thereafter the protective film on the tape is removed and the other paper web is fixed on top of the tape and the end portion is torn away.
This known method has the disadvantage that the torn end edge of the paper web does not always exactly follow the edge of the adhesive surface of the tape, but the edge may have notches resulting from inaccurate tearing, on account of which some of the adhesive surface of the tape will appear. This will result in that the junction points on the paper web wound on a roll will adhere to the ply on top and the ply underneath. This can be prevented for the outer side of the junction by covering the junction with a one-sided tape, but a corresponding operation cannot be carried out on the lower side of the junction, since it rests against the previous ply on the roll.
Thus the known method explained above has the disadvantage that the paper web will often adhere at the junction at least to the ply of the paper web underneath, wherefore the paper web may be broken when it is removed from the roll. The junction point is also relatively thick, since there are superimposed therein two layers of paper and one or two layers of tape. The thickness of the web thus changes abruptly at this point, on account of which the printing roll may even be broken as a result of the impact thereupon.
The object of this invention is to provide a method for joining paper webs, wherewith a junction is produced which involves no danger of adhesion between the paper plies and which is still equally thin as, or thinner than, the junction produced by the known method. The method of the invention is characterized in that both paper webs are fixed end to end onto the same side of the first tape and that the adhesive surface of the first tape is exposed in steps so that prior to the fixing of the tape to the first paper web a longitudinal adhesive zone having a width smaller than the width of the adhesive surface of the tape is exposed, and the remainder of the adhesive surface is exposed after the removal of the end portion of the first web prior to the fixing of the tape to the second web.
With the method of the invention, a butt joint covered on each side with one-sided tapes whose adhesive surface faces the paper is produced, and thus no outwardly exposed adhesive surfaces which could adhere to the other plies of the roll can be produced at the junction point. Furthermore, because of the butt joint between the paper webs the junction point is as thin as, or thinner than, the junction point produced with the previously known method, and the structure of the junction is gradually enlarging in thickness, wherefore the junction point will enter and leave the printing rolls softly.
To produce the butt joint, the preferable procedure is that the adhesive zone located adjacent the longitudinal edge of the tape which is remote from the end edge of the first paper web is exposed first, and thereafter the adhesive zone adjacent the opposite longitudinal edge is exposed.
The invention also relates to a tape for joining paper webs, one side of said tape having an adhesive surface covered with a removable protective film. The tape according to the invention is characterized in that the protective film comprises two longitudinal parts which can be separately removed from the adhesive surface.
In order that the protective film for the -tape would be easily removable in two steps, according to one embodiment of the invention the protective film has a longitudinal slot or weakening line which separates the different parts of the film. In order for both paper webs to adhere to the tape equally strongly, it is preferred that the parts of the film are substantially equally broad and that the combined width thereof corresponds to the width of the tape.
One advantageous embodiment of the invention is explained more closely in the following with reference to the accompanying drawing wherein
Figures 1 to 6 illustrate the different steps of the method of the invention.
Figure 7 shows a cross-section of a produced junction.
Figure 8 shows a top view of a tape used in the method, and
Figure 9 shows a magnified cross-section of the middle portion of the tape.
When a defective point, such as a hole or a point deviating in colour from the other parts of the web, is found in the paper web to be handled, this point is removed by cutting the paper web on both sides of the defective points whereafter the paper webs are again joined by means of a tape.
The method of the invention is explained in the following with reference to Figures 1 to 6. In accordance with Figure 1, one takes a one-sided tape 1 as shown in Figures 8 and 9, whereof a longitudinal zone of the adhesive surface 2 is exposed, the width of said zone being substantially half of the width of the tape and being delimited by that edge of the tape which is remote from the end edge 4 of the first paper web 3. When the tape 1 is fastened to the paper web 3 by means of the adhesive zone 2, the end portion of the paper web which is located between the end edge 4 and the edge of the adhesive zone 2 which is closest to this end edge is torn off from the paper web, whereby the situation shown in Figure 2 is created. The tearing is done by hand, and it is made possible by the portion 5 of the protective film which still partly covers the tape. The removed part of the protective film is indicated by reference numeral 6.
When the paper web 3 is fixed to the tape 1, part 5 of the protective film is removed from the adhesive surface 2 of the tape, whereby a second longitudinal zone of the adhesive surface is exposed. Thereafter the second paper web 7 is fixed to the second adhesive zone of the tape similarly as web 3, and also in this case the end portion of the web is torn off as shown in Figure 4. The accurate tearing, i.e. trimming, of the end portion is now made possible by the edge of the first torn web. Thus both ends are accurately laid face to face without gaps or overlapping paper. The result is a butt joint between the paper webs 3,7 as shown in Figure 5, wherein the end edges of the webs are face to face, fixed to the same one-sided tape 1. Finally, the junction is covered by an one-sided tape 8 from the side opposite tape 1. The tape 8 is preferably substantially narrower than tape 1. After the tapes have been cut, the junction shown in Figure 7 is ready.
The tape used in the method of the invention has been shown more closely in Figures 8 and 9. The adhesive surface 2 of the one-sided tape is covered by parts 5,6 of the protective film, which in the shown embodiment are equally broad and whose combined width corresponds to the width of the tape 1. There is a slot 9 between parts 5,6 of the protective film, on account of which parts 5,6 can be removed from the tape independently and at separate points of time. Both the slot 9 and parts 5, 6 of the protective film are continuous in the longitudinal direction of the tape and extend to the edges of the tape. The bearing layer of the tape is indicated with the reference numeral 10 in Figure 9.
The above presents a preferred embodiment of the method of the invention and the tape used therein, and it is obvious that the invention may differ in its details considerably from what has been presented above. Thus the slot 9 may be replaced for instance by a weakening line or some other arrangement which makes it possible to remove the protective film in steps from the tape. Further, it is to be noted that the tape need not be fixed exactly transverse to the paper webs, but often it is advantageous to fix it to the webs somewhat diagonally, as has been shown in the figures, whereby the impact on the printing roll is weakened. The invention is particularly suitable for use in connection with thin and thick paper qualities, whereby the most suitable thickness for the bearing layer 10 of the tape is selected in view of the required tensile strength and the total thickness of the junction, but it can also be used in connection with other equivalent mater- ials. The width of parts 5,6 of the protective film can be varied according to need.

Claims

C l a i m s :
1. A method for joining paper webs by means of tapes provided with a protective film, in accordance with which an adhesive surface (2) of a first tape (1 ) is exposed, said tape is attached substantially transversely to a first web (3) at a distance from the end edge (4) of the web so that it will extend from one longitudinal edge of the web to the other, the end portion of the web between the tape (1) and the end edge (4) of the web is removed, the same steps are repeated for a second web (7), and the junction point between the webs is covered with a second tape (8), c h a r a c t e r i z e d in that both paper webs (3, 7) are fixed end to end onto the same side of the first tape (1) and that the adhesive surface (2) of the first tape is exposed in steps so that prior to the fixing of the tape to the first paper web (3) a longitudinal adhesive zone having a width smaller than the width of the adhesive surface (2) of the tape is exposed, and the remainder of the adhesive surface is exposed after the removal of the end portion of the first web (3) prior to the fixing of the tape to the second web (7).
2. A method as claimed in claim 1, c h a r a c t e r i z e d in that the adhesive zone located adjacent the longitudinal edge of the tape (1) which is remote from the end edge (4) of the first paper web (3) is exposed first, and thereafter the adhesive zone adjacent the opposite longitudinal edge is disposed.
3. A tape for joining paper webs, one side of said tape (1) having an adhesive surface ( 2 ) covered with a removable protective film (5, 6), c h a r a c t e r i z e d in that the protective film comprises two longitudinal parts (5, 6) which can be separately removed from the adhesive surface.
4. A tape as claimed in claim 3, c h a r a c t e r i z e d in that the protective film has a longitudinal slot (9) or weakening line separating the different parts (5, 6) of the film from one another.
5. A tape as claimed in claim 3, c h a r a c t e r i z e d in that the parts (5, 6) of the film are substantially equally broad and that the combined width thereof corresponds to the width of the tape (1).
EP90901588A 1989-01-19 1990-01-12 Method and tape for joining paper webs Withdrawn EP0454701A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI890287 1989-01-19
FI890287A FI81997C (en) 1989-01-19 1989-01-19 FOERFARANDE OCH TEJP FOER SAMMANFOGNING AV PAPPERSBANOR.

Publications (1)

Publication Number Publication Date
EP0454701A1 true EP0454701A1 (en) 1991-11-06

Family

ID=8527754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90901588A Withdrawn EP0454701A1 (en) 1989-01-19 1990-01-12 Method and tape for joining paper webs

Country Status (6)

Country Link
EP (1) EP0454701A1 (en)
JP (1) JPH04503032A (en)
AU (1) AU4825290A (en)
CA (1) CA2045643A1 (en)
FI (1) FI81997C (en)
WO (1) WO1990008032A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9300707A (en) * 1993-04-26 1994-11-16 Knp Papier Bv Method of welding a paper web and an adhesive strip for use in this method.
AU7940694A (en) * 1994-04-26 1995-11-16 Minnesota Mining And Manufacturing Company Splicing tape, splicing method and splice using the splicing tape
USRE38356E1 (en) * 1994-04-26 2003-12-23 3M Innovative Properties Company Splicing method and splice using the splicing tape
DE29500653U1 (en) * 1995-01-17 1995-03-30 Alex Breuer GmbH, 50667 Köln Glued paper webs
US6951676B2 (en) 2000-09-25 2005-10-04 3M Innovative Properties Company Butt splicing tapes and butt splicing methods
US6899933B2 (en) 2002-09-09 2005-05-31 Permacel Splicing tape with separating portions
DE10258667A1 (en) 2002-12-13 2004-07-08 Tesa Ag Adhesive tape for joining the beginning of a new paper roll to the end of an old paper roll that is running out
US7476429B2 (en) 2003-11-03 2009-01-13 Permacel Bridge label for splicing tape
DE102006003200A1 (en) * 2006-01-24 2007-08-02 Bhs Corrugated Maschinen- Und Anlagenbau Gmbh Method for splicing material webs and splice device
DE102016119520A1 (en) * 2016-10-13 2018-04-19 Aytec Automation Gmbh Process for the preparation of strand material for the processing of seals

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1043556B (en) * 1957-08-17 1958-11-13 Heinrich Hermann Papierwarenfa Method for producing groups of sections or sections from a carrier layer for a permanent adhesive and a base covering this, such as self-adhesive labels
DE2123880A1 (en) * 1971-05-14 1972-11-23 Grossarth, Kurt, 4200 Oberhausen Method and device for applying adhesive strips
US4264401A (en) * 1976-10-22 1981-04-28 Ganz Brothers, Inc. Web splicer
US4348440A (en) * 1979-03-29 1982-09-07 Professional Tape Company, Inc. Pressure sensitive seal
JPS6081956U (en) * 1983-11-10 1985-06-06 株式会社東京自働機械製作所 Film feeding device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9008032A1 *

Also Published As

Publication number Publication date
FI81997C (en) 1991-01-10
AU4825290A (en) 1990-08-13
FI81997B (en) 1990-09-28
FI890287A0 (en) 1989-01-19
JPH04503032A (en) 1992-06-04
CA2045643A1 (en) 1990-07-20
FI890287A (en) 1990-07-20
WO1990008032A1 (en) 1990-07-26

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