EP0716036A1 - Verfahren zum Abreissen von bedrucktem Endlospapier ohne Randlochung und entsprechende Abreiss- und Faltvorrichtung - Google Patents

Verfahren zum Abreissen von bedrucktem Endlospapier ohne Randlochung und entsprechende Abreiss- und Faltvorrichtung Download PDF

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Publication number
EP0716036A1
EP0716036A1 EP94830571A EP94830571A EP0716036A1 EP 0716036 A1 EP0716036 A1 EP 0716036A1 EP 94830571 A EP94830571 A EP 94830571A EP 94830571 A EP94830571 A EP 94830571A EP 0716036 A1 EP0716036 A1 EP 0716036A1
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EP
European Patent Office
Prior art keywords
rollers
paper
pair
tearing
perforation
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Withdrawn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
EP94830571A
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English (en)
French (fr)
Inventor
Luciano Meschi
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.)
Industria Grafica Meschi SRL
Original Assignee
Industria Grafica Meschi SRL
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 Industria Grafica Meschi SRL filed Critical Industria Grafica Meschi SRL
Priority to EP94830571A priority Critical patent/EP0716036A1/de
Publication of EP0716036A1 publication Critical patent/EP0716036A1/de
Withdrawn legal-status Critical Current

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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
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/10—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with devices for breaking partially-cut or perforated webs, e.g. bursters

Definitions

  • the present invention relates to the field of printers, paper processing apparatuses and the like and, more precisely, it relates to a method for tearing paper fed in a continuous strip without lateral dragging holes. Furthermore, the invention relates to improvements in a tearing and folding apparatus for said paper in correspondence with transversal perforations.
  • Printers or paper processing apparatuses of medium and large dimensions are normally fed by a continuous strip of paper.
  • the paper is normally in single, separate sheets or in the form of a continuous strip of sheets divided by transversal perforations suited to facilitate tearing and, therefore, separation of the sheets at a later time.
  • means are provided for the collection of the paper into packages which are then withdrawn automatically or manually.
  • These means for collection of the paper into packages are machines comprising tearing means, folding means and means for the conveying the packages formed.
  • the means for tearing the paper operates each time a package is completed, and every package is formed, for example, as shown in Italian patent application no.22536A/88 in the name of the same applicant.
  • the packages formed are then, contemporaneously with the tearing, automatically removed by means of pushers and conveyor belts.
  • the type of paper used for this type of operation up to this time has been in the form of a continuous strip with lateral dragging holes which engage in "paper-dragging" rollers, comprising radial teeth and located in various points of the paper path.
  • the presence of the paper-dragging rollers enormously facilitates the control of the position of the paper since the lateral holes are equidistant from one another and, therefore, the linear position of the paper can be known in any point of the printer.
  • a further advantage coming from the use of this kind of paper is that, if printers comprising paper-dragging rollers operated with paper which, rather than being taut, formed a loop between two consecutive paper-dragging rollers, the control of the paper would not be compromised in the least.
  • the tearing step is also facilitated by the presence of the respective paper-dragging rollers which, by means of a simple encoder, allow for the calculation of the position of the transversal perforations and, therefore, for the tearing along the separating line of the two consecutive packages.
  • This tear in a widely used printer of that kind, occurs by means of the passage of the paper through two pairs of pinch rollers, the first pair rotating at a lower peripheral velocity than the second at the time of tearing. The different speed causes a great instantaneous tensile stress on the line of perforation and thus produces an immediate separation of the two consecutive sheets.
  • the object of the present invention is to provide a method for the tearing, along transversal perforations, of paper fed in a continuous form without lateral dragging holes, able to assure a precise tear even with paper advancing at a high velocity.
  • a further object of the present invention is to provide improvements in a tearing and folding apparatus for continuously fed paper, for example pre-printed paper, suitable to allow the tearing of the paper at high speeds even if it does not have dragging holes along the lateral edges.
  • the method comprises the steps of:
  • the tearing and folding apparatus which also comprises a first and a second pair of tearing rollers, as well as a third pair of dragging rollers, is provided with improvements according to the invention, the novel feature of which is that the rollers of the third pair are friction rollers and their rotation speed is measured by an encoder provided on one of them and communicating with a processing unit.
  • a sensor is provided communicating with the processing unit to detect the passage of a transversal perforation preceding the perforation to be torn, whereby the processing unit can operate the closing of the first and second pairs of rollers on the paper when the subsequent perforation is in the position to be torn.
  • a tearing and folding apparatus for continuously printed paper is shown, for example of the type described in patent application no. 22536A/88 in the name of the same applicant, comprising a paper-tearing device 1 and a pair of folding rollers 2 and 3 suited to form a package 4.
  • device 1 provides for the tearing of the strip of paper 5 in correspondence with a transversal line of perforations already formed on the paper.
  • package 4 is carried away by removing means not shown because they are of a known type, for example a pneumatic pusher or a conveyor belt.
  • Paper-tearing device 1 is illustrated in figure 2 and comprises an input funnel 6 and an output guide formed by two parallel plates 7 accompanying strip 5 of paper in order to facilitate folding. Between input funnel 6 and output guide 7 a double grate 8 for guiding the paper between a first pair of rollers 10 and a second pair of rollers 11 is provided for.
  • the rollers of pairs 10 and 11 are pinch-rolls and the rollers of the second pair 11 have a speed about 30% faster than that of the first pair 10.
  • On rollers 10 and 11 respectively grooves 12 and 13 are formed which allow for the insertion of grate 8 guiding paper 5.
  • successive transversal perforations are formed and three of them, indicated schematically with 15, 16 and 17 are shown in figure 2.
  • rollers of pair 10 and pair 11 comprise, respectively, fixed rollers 10a and 11a and mobile rollers 10b and 11b, the latter being mounted respectively on supports 18 and 19 which are rotatable with respect to fixed pivots 20 and 21 when set into motion by respective actuators 22 and 23.
  • rollers 10b and 11b are in an open position, illustrated with a dashed line, allowing for free sliding advancement of the paper conveyed by means of a third pair of dragging rollers 25 with roller 25b motorised and roller 25a in neutral, rotating as a result of the friction contact on roller 25b, and both provided with grooves 24 for the passage of grate 8.
  • an encoder 28 is provided for which measures the linear development of paper 5 and communicates the data measured to a central processing unit 30, illustrated schematically in figure 3. Furthermore, an optical sensor 26 to detect the passage of a transversal perforation of paper 5 is provided for along with a small pusher piston 27 suited to create a flexure in paper 5 between the two pairs of rollers 10 and 11, as can be seen in the position illustrated with a dashed line. Also sensor 26 and piston 27 are connected to processing unit 30 (fig. 3) which is also connected with actuators 22 and 23.
  • notches are provided on the edges of each sheet of paper 5 in proximity to the transversal perforations themselves and easily identifiable since they are generally formed in a dark colour, contrasting with the light background of the paper.
  • the length of each sheet, delimited by two consecutive perforations, is already recorded in processing unit 30 or it is communicated to it by a sensor or encoder 31 located in an apparatus upstream from the device 1, connected for example to a transversal perforating device or to an additional optic sensor combined with an encoder at the input.
  • air jets 32 are also shown suited to direct the paper immediately after being torn in order to facilitate folding.
  • device 1 With reference to figure 2, having to produce a tear in correspondence with perforation 16 or 17, device 1 operates as follows. First of all, the signal for tearing is given by the processing unit on the basis of the linear development of paper 5 or, alternatively, by means of a bar-code located on the border of a sheet preceding the perforation line along which the tear must be performed, said bar-code being read by a sensor not shown. Subsequently, sensor 26 detects the passage of perforation 15 and begins from that instant the measurement of the length of the sheet existing between perforation 15 and perforation 16 by means of encoder 28. This operation is possible because paper 5 is taut between rollers 25 and sensor 26.
  • the tear signal is given when processing unit 30 has calculated that the position of the perforation 16 is immediately downstream from rollers 10.
  • the tearing signal causes the closing of rollers 10b and 11b on rollers 10a and 11a and the advancement of piston 27.
  • the difference in speed between rollers 11 and rollers 10 creates tensile stress in the paper comprised between them and the tearing is also favoured by the pushing of piston 27 which initiates the tearing of the paper at perforation 16.
  • the improvements according to the invention allow for the carrying out of the tearing of paper 5 without the necessity for lateral dragging holes in the same.
  • the problem of possible sliding of the paper which could occur between rollers 24a and 24b and cause an error in the calculation of the position of the transversal perforations which would accumulate over time, is overcome by the presence of optic sensor 26 which allows for the zeroing of the calculation of that position before each tearing operation. Any possible sliding that could occur between the reading of the position of perforation 15 and the moment of tearing along perforation 16 or 17 would be entirely negligible since, even if the speed of the paper is high (50-100 cm/sec and even higher) such an error would be less than one tenth of a millimetre.
  • the presence of piston 27 favours the initiation of the tear overcoming the inconvenience which sometimes occurs in apparatuses of a known type which leads in some cases to lacerations of the paper outside the line of perforation or to failure to tear the paper.

Landscapes

  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
EP94830571A 1994-12-09 1994-12-09 Verfahren zum Abreissen von bedrucktem Endlospapier ohne Randlochung und entsprechende Abreiss- und Faltvorrichtung Withdrawn EP0716036A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP94830571A EP0716036A1 (de) 1994-12-09 1994-12-09 Verfahren zum Abreissen von bedrucktem Endlospapier ohne Randlochung und entsprechende Abreiss- und Faltvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94830571A EP0716036A1 (de) 1994-12-09 1994-12-09 Verfahren zum Abreissen von bedrucktem Endlospapier ohne Randlochung und entsprechende Abreiss- und Faltvorrichtung

Publications (1)

Publication Number Publication Date
EP0716036A1 true EP0716036A1 (de) 1996-06-12

Family

ID=8218590

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94830571A Withdrawn EP0716036A1 (de) 1994-12-09 1994-12-09 Verfahren zum Abreissen von bedrucktem Endlospapier ohne Randlochung und entsprechende Abreiss- und Faltvorrichtung

Country Status (1)

Country Link
EP (1) EP0716036A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1153834A1 (de) * 2000-05-11 2001-11-14 Teepack Spezialmaschinen Gmbh & Co. Kg Verfahren zur kontinuierlichen herstellung von aufgussbeuteln
EP1153833A1 (de) * 2000-05-11 2001-11-14 Teepack Spezialmaschinen Gmbh & Co. Kg vorrichtung zum kontinuierlichen trennen von strangmaterialien, insbesondere einer schlange von aufgussbeuteln
EP1468949A1 (de) * 2003-04-16 2004-10-20 Maschinenbau Wilhelm Kochsiek GmbH Abreisseinrichtung für Materialbahnen
US8157141B2 (en) * 2006-06-14 2012-04-17 Cryovac, Inc. System and method for detecting and registering serrated bags
CN116067875A (zh) * 2023-04-06 2023-05-05 无棣海忠软管制造有限公司 一种线材用检测装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1231100B (de) * 1964-12-01 1966-12-22 Eberhard Tilger Dipl Ing Anordnung zur Betaetigung der Trennvorrichtung zum Trennen von mit Schwaechungslinien versehenen Bahnen aus Papier, Kunststoff od. dgl. in einer Schlauchziehmaschine
DE3205801A1 (de) * 1982-02-18 1983-08-25 BÖWE Maschinenfabrik GmbH, 8900 Augsburg Reisser
FR2624490A1 (fr) * 1987-12-10 1989-06-16 Martin Gaston Procede pour la formation en piles en zigzag a partir d'une bande continue en un materiau souple et machine pour la mise en oeuvre de ce procede
EP0479385A1 (de) * 1990-10-03 1992-04-08 Industria Grafica Meschi S.r.l. Apparat zum Hochgeschwindigkeitsstapeln von Papierbögen oder eines kontinuierlichen Bandes mit Abreisstrennung entlang vorperforierter Linien
JPH05310360A (ja) * 1992-05-12 1993-11-22 Iseto Shiko Kk 間欠駆動式連続紙バースト処理装置
JPH0679700A (ja) * 1992-09-02 1994-03-22 Toshiba Seiki Kk 連続用紙切断装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1231100B (de) * 1964-12-01 1966-12-22 Eberhard Tilger Dipl Ing Anordnung zur Betaetigung der Trennvorrichtung zum Trennen von mit Schwaechungslinien versehenen Bahnen aus Papier, Kunststoff od. dgl. in einer Schlauchziehmaschine
DE3205801A1 (de) * 1982-02-18 1983-08-25 BÖWE Maschinenfabrik GmbH, 8900 Augsburg Reisser
FR2624490A1 (fr) * 1987-12-10 1989-06-16 Martin Gaston Procede pour la formation en piles en zigzag a partir d'une bande continue en un materiau souple et machine pour la mise en oeuvre de ce procede
EP0479385A1 (de) * 1990-10-03 1992-04-08 Industria Grafica Meschi S.r.l. Apparat zum Hochgeschwindigkeitsstapeln von Papierbögen oder eines kontinuierlichen Bandes mit Abreisstrennung entlang vorperforierter Linien
JPH05310360A (ja) * 1992-05-12 1993-11-22 Iseto Shiko Kk 間欠駆動式連続紙バースト処理装置
JPH0679700A (ja) * 1992-09-02 1994-03-22 Toshiba Seiki Kk 連続用紙切断装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 18, no. 119 (M - 1567) 25 February 1994 (1994-02-25) *
PATENT ABSTRACTS OF JAPAN vol. 18, no. 335 (M - 1627) 24 June 1994 (1994-06-24) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1153834A1 (de) * 2000-05-11 2001-11-14 Teepack Spezialmaschinen Gmbh & Co. Kg Verfahren zur kontinuierlichen herstellung von aufgussbeuteln
EP1153833A1 (de) * 2000-05-11 2001-11-14 Teepack Spezialmaschinen Gmbh & Co. Kg vorrichtung zum kontinuierlichen trennen von strangmaterialien, insbesondere einer schlange von aufgussbeuteln
EP1468949A1 (de) * 2003-04-16 2004-10-20 Maschinenbau Wilhelm Kochsiek GmbH Abreisseinrichtung für Materialbahnen
US8157141B2 (en) * 2006-06-14 2012-04-17 Cryovac, Inc. System and method for detecting and registering serrated bags
CN116067875A (zh) * 2023-04-06 2023-05-05 无棣海忠软管制造有限公司 一种线材用检测装置
CN116067875B (zh) * 2023-04-06 2023-06-23 无棣海忠软管制造有限公司 一种线材用检测装置

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