EP0888241B1 - Procede pour enrouler une bande, notamment une bande de papier ou de carton - Google Patents

Procede pour enrouler une bande, notamment une bande de papier ou de carton Download PDF

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Publication number
EP0888241B1
EP0888241B1 EP96934846A EP96934846A EP0888241B1 EP 0888241 B1 EP0888241 B1 EP 0888241B1 EP 96934846 A EP96934846 A EP 96934846A EP 96934846 A EP96934846 A EP 96934846A EP 0888241 B1 EP0888241 B1 EP 0888241B1
Authority
EP
European Patent Office
Prior art keywords
web
roll
cut
material strip
face
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.)
Expired - Lifetime
Application number
EP96934846A
Other languages
German (de)
English (en)
Other versions
EP0888241A1 (fr
Inventor
Pekka Eronen
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.)
Valmet Technologies Oy
Original Assignee
Metso Paper Oy
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
Application filed by Metso Paper Oy filed Critical Metso Paper Oy
Priority claimed from CA002239185A external-priority patent/CA2239185C/fr
Publication of EP0888241A1 publication Critical patent/EP0888241A1/fr
Application granted granted Critical
Publication of EP0888241B1 publication Critical patent/EP0888241B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Definitions

  • the invention concerns a method in winding of a web, in particular of a paper or board web, in which method the web is wound onto a roll spool through a nip between a roll and the roll spool.
  • the machine reel produced in a paper machine is often slit into component webs in a slitter-winder, out of which component webs customer rolls or commercial rolls of desired width are formed.
  • a slitter-winder In the commercial rolls formed in the slitter-winder, automatic fixing of the cutting point, i.e. the tail end of the web, to the full roll after winding and the fixing of the initial end of the web to the new roll spool are to-day ever more important properties in further processing of the paper.
  • Ply separation of paper means that, while the paper is fixed by gluing onto the spool from one side, rigid paper and, especially, board grades tend to straighten themselves to their linear form present on the machine reel and are split starting from the end of the web, in which case the starting of winding can fail completely or a fold is formed on the bottom of the roll. It can also be difficult to find a correct degree of weakening of the web when paper grades of different strengths are run.
  • a method comprising the features of the pre-characterizing clause of claim 1 is known from document US-A-5 092 533.
  • this known method two strips of adhesive are applied to the web, and the web is weakened between the two strips of adhesive so that the web is cut off by tightening the web and tearing it at the weakened portion.
  • the same problems are associated with this known method as are explained in the preceding paragraph in respect of the method according to document FI-B-91054.
  • the object of the present invention is to provide a method in which the drawbacks of the prior-art solutions are not present and by whose means the ends of the web can be fixed automatically to the roll and to the spool, respectively, simply and reliably.
  • a material strip with one adhesive face is fixed to the face of the web, the length of said material strip in the running direction of the web being larger than the distance between its fastening points, and the web is cut off at a suitable point between the fastening points. After this, the material strip with one adhesive face is cut off so that one of its parts fixes the final end of the web to the complete roll and the other part fixes the initial end of the web to a new roll spool.
  • the slitter-winder is stopped for the roll change, and the material strip with one adhesive face, preferably a one-sided tape, is fixed to the face of the web from two zones separate from one another. After this, the web is cut off between the tape fixing points. Since the length of the tape in the running direction of the web is longer than the distance between the fastening points, "unused" tape remains between the ends of the cut-off web. A part of this tape is used for fixing the tail of the web to the roll, and the rest is used for fixing the web onto the new roll spool, respectively.
  • the tape has been weakened in advance at the point at which it is supposed to be split between the fastening of the web tail and the fastening of the web onto the spool.
  • the fixing by means of the method of the invention is reliable, because it is carried out across the cut-off area of the web, whereby the risk of ply separation is eliminated fully.
  • Figure 1 is a schematic illustration of the stage of the method of the invention in which the slitter-winder has been stopped for the purpose of cutting off the web and fixing the tape.
  • Figure 2 is a schematic illustration of the stage of the method of the invention in which the web is cut off.
  • Figure 3 is a schematic illustration of the stage of the method of the invention in which the web has been cut off and the tape has been fixed between the final portion and the initial portion of the web.
  • Figure 4A is a schematic illustration of an exemplifying embodiment of cutting off the tape and fixing the tape to the face of a full roll.
  • Figure 4B is a schematic illustration of a second exemplifying embodiment of cutting off the tape and fixing the tape to the face of a full roll.
  • Figure 5 is a schematic illustration of the stage in the method of the invention in which one part of the tape has fixed the final portion of the web to the face of the complete roll and the other part of the tape has fixed the initial portion of the web onto a new roll spool.
  • the web W is wound over a roll 11 or equivalent onto the roll spool 13, around which a paper roll 12 is formed.
  • the winding takes place through the nip N between the roll 11 and the paper roll 12.
  • the web W has been stopped between the upper and lower holding members 24,25 of the web cutting and tape fixing equipment 23.
  • the tape or equivalent material strip with one adhesive face, to be fixed to the web W is denoted with the reference numeral 22, and the web cutting blade with the reference numeral 21.
  • the length Y (Fig. 3) of the tape is larger than the length X of the web portion that remains between the tape 22 fixing points 26,27, because the tape 22 has been bent into a curved or equivalent form.
  • the web is moved in the direction S, in which case the tape 22 is tightened between its fixing points and becomes straight, the adhesive face being placed as the bottom face viewed in the direction of the figure.
  • the nip is opened, i.e. the paper roll 12 shifted to a distance apart from the nip contact with the roll 11, and when the tape is between the roll 11 and the paper roll 12, it is cut off by means of the blade 31, the first part 22A of the tape 22 being guided onto the face of the paper roll.
  • the first part 22A is pressed into contact with the face of the paper roll, whereby the final end of the web has been fixed.
  • the tape 22 has been provided, for example, with a weakening, in which case, when the web W is tightened, the tape 22 is cut off at the weakening.
  • the operations to be carried out after this are similar to those illustrated in Fig. 4A.

Landscapes

  • Replacement Of Web Rolls (AREA)

Claims (4)

  1. Procédé pour enrouler une bande, en particulier une bande de papier ou de carton, procédé dans lequel la bande (W) est enroulée sur une bobine d'enroulement (13) en traversant un intervalle (N) entre un rouleau (11) et ladite bobine d'enroulement (13), dans lequel, quand le rouleau (12) qui se forme sur ladite bobine d'enroulement (13) devient complet, la bande est coupée de sorte qu'une partie finale de la bande (W) est formée en amont de la ligne de coupe, et une partie initiale de la bande (W) est formée en aval de la ligne de coupe, et dans lequel ladite partie finale de la bande (W) est fixée sur la face dudit rouleau complet (12) au moyen d'un adhésif, et ladite extrémité initiale de la bande (W) est fixée sur une nouvelle bobine d'enroulement (13B) au moyen d'un adhésif,
    caractérisé en ce que, quand le rouleau (12) qui est formé sur ladite bobine d'enroulement (13) devient complet, et avant de couper la bande, un ruban de matériau (22) avec une face adhésive est fixé sur la bande (W) au niveau de ses bordures et transversalement à la direction de circulation (S) de la bande (W) à des points de fixation (26, 27) de sorte que les bordures dudit ruban de matériau (22) sont placées sur la bande (W) au niveau desdits points de fixation (26, 27) à une distance (X) entre lesdits points de fixation dans la direction de circulation (S) de la bande (W) qui est plus courte que la longueur (Y) dudit ruban de matériau (22) dans la direction de circulation (S) de la bande (W), en ce que la bande (W) est coupée entre lesdits points de fixation (26, 27), et en ce que ledit ruban de matériau (22) avec une face adhésive est coupé, et une partie (22A) du ruban de matériau coupé (22), partie qui était fixée sur ladite partie finale de la bande (W) en passant sur le rouleau complet (12), fixe ladite partie finale de la bande (W) sur ladite face dudit rouleau complet (12), et l'autre partie (22B) du ruban de matériau (22), partie qui était fixée sur l'extrémité initiale de la bande (W), fixe la bande (W) sur ladite nouvelle bobine d'enroulement (13B) pour le commencement de l'enroulement d'un nouveau rouleau.
  2. Procédé selon la revendication 1, caractérisé en ce que ledit ruban de matériau (22) est coupé au moyen d'une lame (31).
  3. Procédé selon la revendication 1, caractérisé en ce que ledit ruban de matériau (22) est pourvu d'une portion affaiblie, de préférence perforée, au niveau de laquelle le ruban de matériau (22) est coupé en tendant la bande (W) et ledit ruban de matériau (22).
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que ladite partie (22A) dudit ruban de matériau (22) qui est fixée sur ladite face dudit rouleau complet (12) est pressée en contact avec ladite face dudit rouleau complet (12) au moyen d'un élément de pressage (32).
EP96934846A 1996-10-22 1996-10-22 Procede pour enrouler une bande, notamment une bande de papier ou de carton Expired - Lifetime EP0888241B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA002239185A CA2239185C (fr) 1995-10-04 1996-10-22 Procede pour enrouler une bande, notamment une bande de papier ou de carton
PCT/FI1996/000558 WO1998017564A1 (fr) 1995-10-04 1996-10-22 Procede pour enrouler une bande, notamment une bande de papier ou de carton

Publications (2)

Publication Number Publication Date
EP0888241A1 EP0888241A1 (fr) 1999-01-07
EP0888241B1 true EP0888241B1 (fr) 2002-03-27

Family

ID=25680263

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96934846A Expired - Lifetime EP0888241B1 (fr) 1996-10-22 1996-10-22 Procede pour enrouler une bande, notamment une bande de papier ou de carton

Country Status (1)

Country Link
EP (1) EP0888241B1 (fr)

Also Published As

Publication number Publication date
EP0888241A1 (fr) 1999-01-07

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