WO2008125293A1 - Coupeuse transversale pour bande de papier - Google Patents

Coupeuse transversale pour bande de papier Download PDF

Info

Publication number
WO2008125293A1
WO2008125293A1 PCT/EP2008/002881 EP2008002881W WO2008125293A1 WO 2008125293 A1 WO2008125293 A1 WO 2008125293A1 EP 2008002881 W EP2008002881 W EP 2008002881W WO 2008125293 A1 WO2008125293 A1 WO 2008125293A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
counter
cross cutter
paper web
sheet
Prior art date
Application number
PCT/EP2008/002881
Other languages
German (de)
English (en)
Inventor
Reiner Frings
Original Assignee
Vits Systems Gmbh
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 Vits Systems Gmbh filed Critical Vits Systems Gmbh
Publication of WO2008125293A1 publication Critical patent/WO2008125293A1/fr

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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/68—Reducing the speed of articles as they advance
    • B65H29/686—Pneumatic brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/24—Delivering or advancing articles from machines; Advancing articles to or into piles by air blast or suction apparatus
    • B65H29/241—Suction devices
    • B65H29/243—Suction rollers
    • 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
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/421—Forming a pile
    • B65H2301/4212—Forming a pile of articles substantially horizontal

Definitions

  • the invention relates to a cross cutter for a continuously fed paper web according to the preamble of claim 1.
  • Cross cutters are used e.g. used in paper finishing in web offset printing, e.g. to cut printed paper webs into right-angled sheets.
  • known as mechanical devices from US 4,221, 377 are known rotary cross-cutters in which knives are mounted on two rotatable rollers between which the paper web is transported. If a cut is to be made, the rolls are driven so that the paper web is severed by the knives perpendicular to the web running direction.
  • Another cross cutter is described in DE 23 48 320 C3. Here a rotating knife is arranged over a fixed knife. After each cut, the sheets are transported further, decelerated and finally deposited on a pile.
  • a disadvantage of the known mechanical cross-cutters is that when using so-called coldset printing inks, which set by reaction in air and do not need to be dried, smearing of the printed image and increased deposits of the ink can come to be touched by the web components , Therefore, the print quality is not consistently satisfactory, and the sheeter needs to be cleaned frequently to remove the deposits. Therefore, until today in coldset printing, only sheets are processed in the printing press; Rolled paper is not printed here, unless the paper web is cut into sheets before printing. This has the disadvantage that printing with a maximum of 10,000 sheets / h is much slower with two-sided printing than with roll printing (up to 45,000 sheets / h double-sided printing) and that the printing press is more complex.
  • the coldset printing has the advantage that the aftertreatment of the finished paper web is less complicated because e.g. Drying and cooling are eliminated, so that a plant is comparatively compact and economical in energy consumption.
  • the object of the invention is to provide a cross cutter for printed paper webs, which allows the use of web printing for coldset inks.
  • the problem is solved by claim 1.
  • the depositing device comprises a transfer roller and a brake roller, the axes of which are arranged in a plane directed radially downward from the counter-roller and in each case in close proximity to one another. Therefore, also in the field of sheet storage, so after the cut, a smearing of the pressure effectively avoided.
  • the counter knife which is preferably designed as a counter-plate, is arranged on a counter-roller. As a result, the paper web is supported until the cut and transported after the cut as a sheet.
  • the advantages of the coldset pressure can be combined with those of the roll pressure: On the one hand, no drying and cooling devices are required, so that the entire system is built relatively compact and energy-efficient. On the other hand, the pressure is possible at a very high speed, so that in particular mass printed matter can be processed.
  • the device for feeding comprises according to claim 2 at least one rotationally driven suction roll.
  • a sufficiently high train is exerted on the paper web and transported so safe in the sheeter.
  • slippage between it and the paper web is prevented by the negative pressure exerted by the suction roll, so that the pressure can not smear.
  • Additional blowing agents on the transfer roller according to claim 4 and 5 cause a secure transition of the sheet on the brake roller.
  • At least two counter-blades are arranged on the counter-roller, wherein a circumference of the counter-roller corresponds to twice the length of the sheet.
  • the overall transport is calmer.
  • a circumference of the knife roll should be at least exactly one length of the sheet or an integer multiple thereof. This ensures that the cut matches a printed image.
  • a further advantage of the cross cutter according to the invention is that with changes in the quality of the paper web, especially the grammage or the thickness, the settings on the cross cutter (according to the prior art, especially in hovering lists) need not be changed. Therefore, such changes are quick and easy to carry out here.
  • FIG. 1 shows a side view of a cross cutter according to the invention and FIG. 2 shows a laying device of FIG. 1 as a detail.
  • a paper web 1 is guided in the web running direction one behind the other via two parallel driven feed rollers 2 and thereby deflected.
  • the feed rollers 2 are designed as suction rollers; that is, each of them has a perforated shell 3a and a laterally introduced, fixed suction 5a.
  • an effective suction region is limited to a wrapping region of the paper web 1 in each of the feed rollers 2.
  • two corresponding sealing strips 4 between the stationary (non-rotatable) suction 5a and the shell 3a are arranged inside each feed roller. An opening of the suction line 5a points into the effective suction area.
  • the paper web 1 is guided over a drivable counter-roller 6.
  • This is parallel to the feed rollers 2 and as this formed as a suction roller and has for this purpose substantially the same structure with perforated shell 3b, suction 5b and sealing strips 4.
  • two counter-blades 7 are inserted parallel to their longitudinal axis so that they terminate approximately with the outer circumference of the shell 3b and are arranged offset by 180 °.
  • Each counter knife 7 is formed as a bar with a flat surface.
  • the circumference of the counter roll 6 is twice the length of a cut 1A of the paper web 1.
  • a drivable knife roller 8 is mounted so that its longitudinal axis parallel and horizontal to the longitudinal axis of the counter-roller 6 of the feed rollers 2 away (which is to the right of Figure 1) is offset.
  • a knife 9 is detachably fastened parallel to its longitudinal axis, the circumference of the knife roller corresponding to the length of the sheet 1A cut off from the paper web 1.
  • the knife roller 8 and the counter-roller 6 are synchronized in such a way that during operation the knife 9 always hits exactly one of the counter-knives 7; that is, the knife roller 8 is driven twice as fast as the counter roller 6.
  • the mutual distance between the knife roller 8 and the counter roller 6 is adjustable so that in a corresponding position, a cutting edge of the knife 9 just the surface of the counter knife. 7 touched.
  • the paper web 1 and the sheet 1A is guided on a drivable transfer roller 10 and a drivable brake roller 11, which together form parts of a depositing device 12 and each have a circumference corresponding to Have length of the arc 1A.
  • the transfer roller 10 is arranged in the lower region of the counter-roller 6 and at a minimal distance from it, so that the longitudinal axes are offset horizontally and the knife roller 8 and the transfer roller 10 are arranged approximately vertically one above the other.
  • the transfer roller 10 is partially formed as a suction roll and partially as a blower roll.
  • Her coat 3c is perforated for this purpose; in the transfer roller 10 a fixed suction line 5c are arranged with an opening in a suction region and a fixed blow pipe 13 with an opening in a blowing region.
  • the blowpipe 13 is connected to a compressed air line.
  • the suction area, the blowing area and a non-effective area are stationary and separated from each other by the sealing strips 4.
  • the suction region starts at the position where the backing roll 6 and the transfer roll 10 have the shortest distance from each other, and ends in the running direction of the paper web 1 and the sheet 1A in a region where the transfer roll 10 and the brake roll 11 are close to each other.
  • the blowing region Immediately adjacent to the suction region, the blowing region adjoins, which extends over approximately 20 ° to 45 ° of the circumference of the transfer roll 10. At least one opening of the blower tube 13 acts in the blowing region. Between the beginning of the suction region and the end of the blowing region, the non-effective region is arranged.
  • a over the entire width extending portion of the shell 3c of the transfer roller 10 is carried out without holes, so that here neither suction nor pressure act.
  • a nozzle 14 is preferably arranged, which extends over a substantial part of the width of the transfer roller 10 and parallel to its longitudinal axis.
  • the nozzle 14 is connected to the compressed air line and e.g. designed as a slot nozzle.
  • the partial area is arranged relative to the counter knives 7 so that it always reaches the line of the shortest distance between the counter roller 6 and the transfer roller 10 during operation, always just before one of the counter blades 7.
  • the brake roller 11 is arranged below the transfer roller 10 and offset to the right so that there is a small distance between them.
  • the brake roller 11 is designed as a suction roller with a perforated jacket 3d, suction line 5d and sealing strips 4, with its effective area in the vicinity of the transfer roller 10 being limited to a circumferential area of approximately 90 ° ⁇ 10 °.
  • a tray 15 is arranged to form a stack of sheets 1A.
  • the circumference of the feed rollers 2 and the brake roller 11 are independent of the length of the sheet 1A.
  • the circumference of the remaining rolls of the cross cutter must always correspond to the product of a whole number and the length of the sheet 1A.
  • the knife roller 8 and the transport rollers which are the feed rollers 2, the counter roller 6, and the transfer roller 10, driven so that their peripheral speed corresponds exactly to a transport speed of the paper web 1 in an upstream printing press.
  • Air is sucked off via the suction lines 5 and thus all the effective suction regions of the suction rolls are placed under reduced pressure, so that the paper web 1 rests firmly and essentially immovably on these suction rolls. A relative speed between the suction rolls and the paper web 1 or the sheet 1A and thus slip is prevented.
  • the feed rollers 2 pull the paper web 1 from the printing press and transport it to the counter-roller 6, from which the paper web 1 is deflected by approximately 180 °.
  • the counter-roller 6 cooperates with the knife roller 8 such that the paper web 1 is cut into sheets 1A of defined length.
  • the knife 9 hits with each revolution of the knife roller 8 on one of the counter blade 7, so that a cut is made perpendicular to the transport direction of the paper web 1; the piece of the paper web 1 located in front of the cut is then transported in each case further as a sheet 1A, while behind the cut the paper web 1 is further transported.
  • a beginning of the paper web 1 dissolves at the end of the wrapping region of the counter-roller 6 from this and is sucked by the transfer roller 10, taken over and transported on. It is then released in the blowing area due to the action of the compressed air from the transfer roller 10 and floats - still at substantially the transport speed - on the tray 15 and the stack optionally formed thereon. In the meantime, a cut has been made as described above, so that the beginning of the paper web 1 has become a beginning of the sheet 1A. The end of this sheet 1A passes in the further course on the transfer roller 10, namely on the portion without holes. Therefore, there is no negative pressure, so that the end of the sheet 1A due to the centrifugal force of the transfer roller 10 dissolves; This can be supported by compressed air from the nozzle 14, especially during start-up or stop operation.
  • the end of the sheet 1A then passes onto the braking roller 11, which is driven at a braking speed which is substantially less than the transport speed.
  • the braking roller 11 By the negative pressure exerted by the brake roller 11, the end of the sheet 1A is held thereon and thus braked to the braking speed. Also Here, a relative speed between the end of the sheet 1A and the brake roller 11 is prevented.
  • the sheet 1A disengages and slides over the tray 15 or over the stack until its beginning meets a stop 16.
  • the speed of the sheet 1A is braked so far that he now sits down and comes to rest on the tray 15 or on the stack.
  • the knife roller 8 has a circumference equal to twice the length of the sheet 1A. There are then two blades 9 arranged, which are offset by 180 °.
  • the transfer roller 10 has a circumference equal to twice the length of the sheet 1A. There are then two sections without holes and two nozzles 14 are arranged.
  • cleaning devices for the suction rolls are arranged, which are e.g. be automatically controlled at predetermined intervals or manually as needed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Advancing Webs (AREA)

Abstract

La présente invention concerne une coupeuse transversale pour bande de papier. Lors de l'utilisation d'encres séchant à froid, il était jusqu'à présent impossible d'imprimer en continu des bandes de papier puis de les découper en feuilles. L'invention vise de ce fait à mettre au point une coupeuse transversale qui peut être utilisée également pour des bandes de papier imprimées dont les encres ont été séchées à froid, sans que la qualité d'impression ne soit altérée, par exemple par maculage. Les différences de vitesse entre la bande de papier et les rouleaux de la coupeuse transversale en contact avec ladite bande sont pour ce faire supprimées.
PCT/EP2008/002881 2007-04-16 2008-04-11 Coupeuse transversale pour bande de papier WO2008125293A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007018177.7 2007-04-16
DE200710018117 DE102007018117B4 (de) 2007-04-16 2007-04-16 Querschneider für eine Papierbahn

Publications (1)

Publication Number Publication Date
WO2008125293A1 true WO2008125293A1 (fr) 2008-10-23

Family

ID=39620311

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/002881 WO2008125293A1 (fr) 2007-04-16 2008-04-11 Coupeuse transversale pour bande de papier

Country Status (2)

Country Link
DE (1) DE102007018117B4 (fr)
WO (1) WO2008125293A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3290366A1 (fr) 2016-09-02 2018-03-07 OCE Holding B.V. Appareil de manipulation de feuilles à tambour rotatif
EP3325387A4 (fr) * 2015-07-24 2019-04-17 Curt G. Joa, Inc. Appareil et procédés de commutation à vide

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338575A (en) * 1965-03-10 1967-08-29 Paper Converting Machine Co Web lapping apparatus
DE1611416B1 (de) * 1967-08-03 1972-03-16 Windmoeller & Hoelscher Vorrichtung zum transportieren von papier oder kunststoff folienwerkstuecken insbesondere fuer sackherstellungs maschinen
DE2348320A1 (de) * 1973-09-26 1975-03-27 Vits Maschinenbau Gmbh Vorrichtung zum stapelweisen ablegen einzelner gleichlanger bogen auf einer ablage
US4221377A (en) * 1977-10-12 1980-09-09 Jagenberg Werke Aktiengesellschaft Apparatus for decelerating and stacking sheets

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2019320A1 (de) * 1970-04-22 1971-11-04 Heinrich Fichte Transporteinrichtung an rotierenden Querschneidern fuer weiches,unstabiles Material
DE2237846C3 (de) * 1972-08-01 1974-12-19 Windmoeller & Hoelscher, 4540 Lengerich Vorrichtung zum Aufkleben von mit Haftklebstoff beschichteten Zetteln
US4717135A (en) * 1986-08-12 1988-01-05 Kimberly-Clark Corporation Apparatus and process for automatically interfolding sheets and separating them into bundles
DE3927422C2 (de) * 1989-08-19 1998-07-09 Winkler Duennebier Kg Masch Verfahren und Vorrichtung zur Herstellung von zahlgerechten Teilstapeln aus überlappend ineinandergefalteten Tüchern
CH688893A5 (de) * 1994-05-11 1998-05-15 De La Rue Giori Sa Zugwalze zum Transport einer Materialbahn, insbesondere einer Papierbahn in einer Rollendruckmaschine.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338575A (en) * 1965-03-10 1967-08-29 Paper Converting Machine Co Web lapping apparatus
DE1611416B1 (de) * 1967-08-03 1972-03-16 Windmoeller & Hoelscher Vorrichtung zum transportieren von papier oder kunststoff folienwerkstuecken insbesondere fuer sackherstellungs maschinen
DE2348320A1 (de) * 1973-09-26 1975-03-27 Vits Maschinenbau Gmbh Vorrichtung zum stapelweisen ablegen einzelner gleichlanger bogen auf einer ablage
US4221377A (en) * 1977-10-12 1980-09-09 Jagenberg Werke Aktiengesellschaft Apparatus for decelerating and stacking sheets

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3325387A4 (fr) * 2015-07-24 2019-04-17 Curt G. Joa, Inc. Appareil et procédés de commutation à vide
US10494216B2 (en) 2015-07-24 2019-12-03 Curt G. Joa, Inc. Vacuum communication apparatus and methods
US10633207B2 (en) 2015-07-24 2020-04-28 Curt G. Joa, Inc. Vacuum commutation apparatus and methods
EP3290366A1 (fr) 2016-09-02 2018-03-07 OCE Holding B.V. Appareil de manipulation de feuilles à tambour rotatif
US10053323B2 (en) 2016-09-02 2018-08-21 Océ Holding B.V. Sheet handling apparatus with rotary drum

Also Published As

Publication number Publication date
DE102007018117A1 (de) 2008-10-30
DE102007018117B4 (de) 2010-09-09

Similar Documents

Publication Publication Date Title
DE3217628C2 (de) Verfahren sowie eine Vorrichtung zum Aufwickeln je eines Abschnittes von mehreren auf einander folgenden Abschnitten einer endlosen Material-Bahn
DE202004009490U1 (de) Vorrichtung zur veredelnden Bearbeitung von bogenförmigen Substraten
DE10356405A1 (de) Vorrichtung zur veredelnden Bearbeitung von endlosen bahnförmigen Substraten
DE3203992C2 (de) Anordnung zum Herstellen von Damenbinden
DD218318A5 (de) Tiefdruckmaschine
DE102015218316A1 (de) Wellpappe-Anlage
EP1332997B1 (fr) Procédé et dispositif pour l'élimination de matériau en bande
EP0697989B1 (fr) Dispositif permettant de transferer et d'empiler des feuilles
WO2006114136A1 (fr) Systeme pour faire rouler des groupes d'articles pour fumeurs, sous forme de tiges
DE102016225980B4 (de) Vorrichtung zum Abschneiden einer an einer durch die Vorrichtung zu führenden Materialbahn hängenden Materialbahnfahne sowie Rollendruckmaschine
DE3832595A1 (de) Verfahren und vorrichtung zur herstellung von zick-zack-foermig ineinandergefalteten tuechern
DE102007018117B4 (de) Querschneider für eine Papierbahn
EP3459724A2 (fr) Installation de carton ondulé
EP0329089A1 (fr) Dispositif d'alimentation en papier pour une imprimante rapide utilisant des feuilles individuelles
DE3520965C2 (fr)
EP3016804B1 (fr) Production au moyen d'un dispositif de cadencement pour le transfert de films à froid
DE19931002A1 (de) Vorrichtung zum Verstellen des effektiven Zylinderdurchmessers
EP1972718A2 (fr) Dispositif de guidage ou de transfert d'une bande en papier, carton ou autre matière fibreuse
EP3059195B1 (fr) Dispositif de pliage et procédé
EP3757046A1 (fr) Dispositif et procédé de raccordement de deux bandes de matière se déroulant d'une bobine
DE4314756C2 (de) Vorrichtung zum Schuppen und Ablegen von Bogen auf einen Stapel
EP1240986B2 (fr) Dispositif de découpage ayant des moyens pour aspirer et souffler
DE102014225262A1 (de) Randstreifen-Schneideeinrichtung
AT11148U1 (de) Vorrichtung zum führen bzw. überführen einer faserstoffbahn
EP3398891B1 (fr) Dispositif de production de collections d'imprimés en forme de feuilles, et appareil correspondant de pliage de collections d'imprimés en forme de feuilles

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08748887

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 08748887

Country of ref document: EP

Kind code of ref document: A1