EP0906826B1 - Machine à imprimer à feuilles recto-verso - Google Patents

Machine à imprimer à feuilles recto-verso Download PDF

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Publication number
EP0906826B1
EP0906826B1 EP19980250349 EP98250349A EP0906826B1 EP 0906826 B1 EP0906826 B1 EP 0906826B1 EP 19980250349 EP19980250349 EP 19980250349 EP 98250349 A EP98250349 A EP 98250349A EP 0906826 B1 EP0906826 B1 EP 0906826B1
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EP
European Patent Office
Prior art keywords
sheet
cylinder
side printing
impression
printing unit
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
EP19980250349
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German (de)
English (en)
Other versions
EP0906826A3 (fr
EP0906826A2 (fr
Inventor
Hiroyuki c/o Komori Corp. Toride Plant Sugiyama
Kazuhiro c/o Komori Corp. Toride Plant Maejima
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.)
Komori Corp
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Komori Corp
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Filing date
Publication date
Application filed by Komori Corp filed Critical Komori Corp
Publication of EP0906826A2 publication Critical patent/EP0906826A2/fr
Publication of EP0906826A3 publication Critical patent/EP0906826A3/fr
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Publication of EP0906826B1 publication Critical patent/EP0906826B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/10—Combinations of transfer drums and grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/025—Multicolour printing or perfecting on sheets or on one or more webs, in one printing unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/04—Rotary lithographic machines for offset printing using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs
    • B41F7/06—Rotary lithographic machines for offset printing using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs for printing on sheets

Definitions

  • the invention relates to a perfecting sheet-fed rotary press which transfers a sheet between impression cylinders of face side printing units and impression cylinders of reverse side printing units to print both sides of the sheet.
  • Fig. 2 Another example of the above type of printing press is shown in Fig. 2 (see Japanese Unexamined Patent Publication No. 336003/94).
  • a printing unit 104 sheets piled on a feeder 100 are fed to a printing unit 104 via a register board 101, a swing gripper device 102, and a transfer cylinder 103.
  • both sides of each sheet are printed in four colors per side.
  • the printing unit 104 is constructed in the following manner: Above an impression cylinder 105a having a sheet gripper, a blanket cylinder 106a, a plate cylinder 107a, and an inking unit 108a are provided to form a face side printing unit 109a. Below an impression cylinder 105b having a sheet gripper, a blanket cylinder 106b, a plate cylinder 107b, and an inking unit 108b are provided to form a reverse side printing unit 109b.
  • the impression cylinder 105a of the face side printing unit 109a and the impression cylinder 105b of the reverse side printing unit 109b are horizontally connected together to constitute a 1st color double-sided printing unit A as one unit.
  • 2nd color to 4th color double-sided printing units B to D are also constituted.
  • These 1st color to 4th color double-sided printing units A to D are horizontally connected together by intermediate cylinders 110 to construct the printing unit 104.
  • the intermediate cylinders 110 have sheet grippers, and are provided such that two of the intermediate cylinders 110 are arranged between the adjacent double-sided printing units.
  • each sheet is transferred from the transfer cylinder 103 to the impression cylinder 105a of the face side printing unit 109a constituting the 1st color double-sided printing unit A, and its face side is printed in the first color. Then, the printed sheet is transferred to the impression cylinder 105b of the reverse side printing unit 109b to have its reverse side printed in the first color. Then, the sheet is fed to the 2nd color double-sided printing unit B via the two intermediate cylinders 110, and further fed to the 3rd color to 4th color double-sided printing units C to D in this order to have its face and reverse sides printed in the second to fourth colors.
  • the reference numeral 111 denotes a delivery unit.
  • the sheet after completion of printing is transferred from the impression cylinder 105b at the tail of the printing unit 104 to a delivery cylinder 113 via the intermediate cylinders 110 and a transport cylinder 112. From the delivery cylinder 113, the sheet is delivered onto a pile plate of a pile raising and lowering device 115 by means of a chain gripper 114.
  • the impression cylinder and the plate cylinder are set at nearly the same diameter.
  • transfer (gripping change) of a sheet is performed between the impression cylinder and the adjacent impression cylinder and between the impression cylinder and the adjacent intermediate cylinder, before the sheet is released from between the blanket cylinder and the impression cylinder in the preceding printing unit.
  • a difference in peripheral speed due to the manufacturing error of the cylinder diameter or the like
  • the tension of the sheet changes, so that the sheet may be stretched or loosened.
  • the sheet If the sheet is stretched, the sheet remains locked, with its trailing edge being pinched between the impression cylinder and the blanket cylinder, namely, the sheet remains firmly pressed against the surface of the impression cylinder.
  • shear relative to the surface of the impression cylinder occurs in a printed surface of the sheet facing the surface of the impression cylinder.
  • the printed surface of the sheet rubs against the surface of the impression cylinder, whereby ink adheres to the surface of the impression cylinder.
  • a printed surface of a subsequent sheet is displaced relative to the ink adhering to the surface of the impression cylinder.
  • the ink adhering to the surface of the impression cylinder adheres to the displaced site of the printed surface of the sheet facing the impression cylinder surface, and appears as a smudge or doubling. Scratches also occur.
  • the trailing edge of the sheet is pulled toward the blanket cylinder by the attracting force of the ink that has adhered to the blanket cylinder.
  • shear develops between the surface of the impression cylinder and the printed surface of the sheet facing the impression cylinder surface. Consequently, the same disadvantages occur. Such disadvantages also emerge when there is a difference in peripheral speed between the impression cylinder and the intermediate cylinder.
  • the present invention provides a perfecting sheet-fed rotary press as claimed in claim 1. According to this constitution, even if the peripheral speeds of the adjacent cylinders are different, the tension of a sheet does not change during its transfer, and no printing malfunctions due to shear between the sheet and the cylinder take place.
  • Fig. 1 is a schematic constitutional view of a four-color perfecting sheet-fed rotary press showing an embodiment of the present invention.
  • the reference numeral 1 denotes a feeding unit, 2 a printing unit, and 3 a delivery unit.
  • An impression cylinder 4a at the head of the printing unit 2 is fed with sheets, which are piled on the feeding unit 1, via a register board 10, a swing gripper device 11, and a transfer cylinder 12.
  • From an impression cylinder 4b at the tail of the printing unit 2 the sheet after completion of printing is transferred to a delivery cylinder 14 of the delivery unit 3 via a transport cylinder 13.
  • the delivery cylinder 14 From the delivery cylinder 14, the sheet is delivered onto a pile plate of a pile raising and lowering device 16 by means of a chain gripper 15.
  • the printing unit 2 consists of four face side printing units 8A to 8D, and four reverse side printing units 9A to 9D.
  • the 1st color to 4th color face side printing units 8A to 8D are each formed by providing a blanket cylinder 5a, a plate cylinder 6a, and an inking unit 7a above the impression cylinder 4a having a sheet gripper.
  • the 1st color to 4th color reverse side printing units 9A to 9D are each formed by providing a blanket cylinder 5b, a plate cylinder 6b, and an inking unit 7b below the impression cylinder 4b having a sheet gripper.
  • the impression cylinders 4a, 4b of the four face side printing units 8A to 8D and the four reverse side printing units 9A to 9D each have a diameter twice the diameter of each of the plate cylinders 6a, 6b having the same diameter as that of the blanket cylinders 5a, 5b in rolling contact with the impression cylinders 4a, 4b.
  • the blanket cylinders 5a, 5b are for printing a sheet on an impression cylinder 4a, 4b.
  • the so formed face side printing units 8A, 8B, 8C, 8D and reverse side printing units 9A, 9B, 9C, 9D are alternately connected, for example, such that the 1st color face side printing unit 8A is followed by the 1st color reverse side printing unit 9A, then followed by the 2nd color face side printing unit 8B, and so on.
  • the impression cylinders 4a, 4b constituting the face side and reverse side printing units 8A to 8D, 9A to 9D are connected together in the horizontal direction.
  • the respective impression cylinders 4a, 4b are connected together so that a line connecting the shaft centers of these impression cylinders will be zigzag.
  • the present embodiment is also constituted such that after the sheet exits from between the blanket cylinder 5a and the impression cylinder 4a and between the blanket cylinder 5b and the impression cylinder 4b in the preceding printing units 8A to 8D, 9A to 9D, the sheet is transferred between the impression cylinders 4a and 4b and between the impression cylinder 4b and the transport cylinder 13.
  • the cylinders are arranged such that the distance from the printing position, which is the point of contact between the impression cylinder 4a (4b) and the blanket cylinder 5a (5b), to the gripping change position on the next impression cylinder 4a (4b) or the transport cylinder 13 is longer than the length (L) of the sheet.
  • the cylinders are arranged to meet the following relation: L ⁇ D ⁇ ( ⁇ /360) where L is the length of the sheet, D is the diameter of the impression cylinder, and ⁇ is the angle from the printing position to the gripping change position.
  • each sheet is transferred from the transfer cylinder 12 to the impression cylinder 4a of the first face side printing unit 8A to have its face side printed in the first color. Then, the printed sheet is transferred to the impression cylinder 4b of the first reverse side printing unit 9A to have its reverse side printed in the first color. Then, the double-sided printed sheet is fed sequentially to the second to fourth face side printing units 8B to 8D and the second to fourth reverse side printing units 9B to 9D to have its face and reverse sides printed alternately in the second to fourth colors in the same manner as described above.
  • the sheet after completion of printing is transferred from the impression cylinder 4b at the tail of the printing line to the delivery cylinder 14 via the transport cylinder 13. From the delivery cylinder 14, the sheet is delivered onto the pile plate of the pile raising and lowering device 16 by means of the chain gripper 15, as has been described earlier.
  • the cylinders are arranged such that the distance from the printing position, which is the point of contact between the impression cylinder 4a (4b) and the blanket cylinder 5a (5b), to the gripping change position on the next impression cylinder 4a (4b) or the transport cylinder 13 is longer than the length (L) of the sheet. Furthermore, after the sheet exits from between the blanket cylinder 5a and the impression cylinder 4a and between the blanket cylinder 5b and the impression cylinder 4b in the preceding printing units 8A to 8D, 9A to 9D, the sheet is transferred between the impression cylinders 4a and 4b and between the impression cylinder 4b and the transport cylinder 13. Thus, even if the peripheral speeds of the adjacent cylinders are different, the tension of the sheet does not change during its transfer, and no printing malfunctions due to shear between the sheet and the cylinder take place. That is, the following events that would otherwise occur are prevented from happening:
  • the sheet If the sheet is stretched, the sheet remains locked, with its trailing edge being pinched between the impression cylinder 4a (4b) and the blanket cylinder 5a (5b); namely, the sheet remains firmly pressed against the surface of the impression cylinder.
  • shear relative to the surface of the impression cylinder occurs in the printed surface of the sheet facing the surface of the impression cylinder.
  • the printed surface of the sheet rubs against the surface of the impression cylinder, whereby ink adheres to the surface of the impression cylinder.
  • the printed surface of a subsequent sheet is displaced relative to the ink adhering to the surface of the impression cylinder.
  • the ink adhering to the surface of the impression cylinder adheres to the displaced site of the printed surface of the sheet facing the impression cylinder surface, and appears as a smudge or doubling. Scratches also occur.
  • the trailing edge of the sheet is pulled toward the blanket cylinder 5a (5b) by the attracting force of the ink that has adhered to the blanket cylinder 5a (5b).
  • shear develops between the surface of the impression cylinder and the printed surface of the sheet facing the impression cylinder surface. Consequently, the same disadvantages occur.
  • the present invention provides the perfecting sheet-fed rotary press which transfers a sheet between each of the impression cylinders of the face side printing units and each of the impression cylinders of the adjacent reverse side printing units to print both sides of the sheet, wherein the cylinders are arranged such that the sheet can be transferred between the adjacent cylinders after the sheet is released from between the blanket cylinder and the impression cylinder in the preceding printing unit. Even if the peripheral speeds of the adjacent cylinders are different, therefore, the tension of the sheet does not change during its transfer, so that no printing malfunctions due to shear between the sheet and the cylinder take place. Thus, the number of waste papers can be decreased.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rotary Presses (AREA)

Claims (2)

  1. Presse rotative feuille à feuille recto-verso comprenant :
    une pluralité de groupe imprimants côté recto (8A à 8D) et une pluralité de groupes imprimants côté verso (9A à 9D) de telle sorte que les deux côtés d'une feuille puissent être imprimés,
    chacun des groupes imprimants côté recto et côté verso (8A à 8D, 9A à 9D) comprenant un cylindre d'impression (4a, 4b) et un cylindre porte-blanchet (5a, 5b) pour imprimer une feuille sur le cylindre d'impression (4a, 4b),
    les cylindres d'impression (4a) des groupes imprimants côté recto (8A à 8D) et les cylindres d'impression (4b) des groupes imprimants côté verso (9A à 9D) étant disposés en alternance adjacents l'un par rapport à l'autre, de telle sorte qu'un côté de la feuille puisse être imprimé par les groupes imprimants côté recto (8A à 8D) et que l'autre côté de la feuille puisse être imprimé par les groupes imprimants côté verso (9A à 9D) et que la feuille soit transmise entre les cylindres d'impression (4a) des groupes imprimants côté recto (8A à 8D) et les cylindres d'impression (4b) des groupes imprimants côté verso (9A à 9D), de façon à réaliser l'impression des deux côtés de la feuille,
       caractérisée en ce que
       les cylindres d'impression (4b) des groupes imprimants côté verso (9A à 9D) sont disposés de telle sorte que la distance à partir de chaque position d'impression, qui est pour chaque groupe imprimant côté recto (8A à 8D) le point de contact entre son cylindre d'impression (4a) et son cylindre porte-blanchet (5a) par rapport à la position de changement de préhension sur le cylindre d'impression (4b) suivant appartenant au groupe imprimant côté verso (9A à 9D) soit plus longue que la longueur de la taille maximale de la feuille à imprimer,
       la feuille de taille maximale peut être saisie par le cylindre d'impression (4b) de chaque groupe imprimant côté verso (9A à 9D) et transmise à celui-ci après que la feuille de taille maximale a été libérée de la préhension par le cylindre d'impression (4a) et par le cylindre porte-blanchet (5a) du groupe imprimant côté recto précédent (8A à 8D) et
       les cylindres d'impression (4a) des groupes imprimants côté recto (8A à 8D) recevant la feuille de taille maximale en provenance des cylindres d'impression (4b) des groupes imprimants côté verso (9A à 9D) sont disposés de telle sorte que la distance de chaque position d'impression, qui est pour chaque groupe imprimant côté verso (9A à 9D) le point de contact entre son cylindre d'impression (4b) et son cylindre porte-blanchet (5b), jusqu'à la position de changement de préhension sur le cylindre d'impression suivant (4a) appartenant au groupe imprimant côté recto (8A à 8D) est plus longue que la longueur de la taille maximale de la feuille à imprimer,
       dans laquelle la feuille de taille maximale peut être saisie par le cylindre d'impression (4a) de chaque groupe imprimant côté recto (8A à 8D) et transmise à celui-ci après que la feuille de la taille maximale a été libérée de la préhension par le cylindre d'impression (4b) et par le cylindre porte-blanchet (5b) du groupe imprimant côté verso précédent (9A à 9D).
  2. Presse rotative feuille à feuille recto-verso de la revendication 1,
    caractérisée en ce que
       le cylindre porte-blanchet (5a) de chaque groupe imprimant côté recto (8A à 8D) et le cylindre porte-blanchet (5b) de chaque groupe imprimant côté verso (9A à 9D) sont en contact de roulement avec le cylindre d'impression (5a, 5b),
       chaque groupe imprimant côté recto (8A à 8D) et chaque groupe imprimant côté verso (9A à 9D) possèdent un cylindre porte-plaque (6a, 6b) étant en contact de roulement avec le cylindre porte-blanchet respectif (5a, 5b) pour transmettre un motif sur le cylindre porte-blanchet respectif (5a, 5b) et
       le cylindre d'impression (4a) de chaque groupe imprimant côté recto (8A à 8D) et le cylindre d'impression (4b) de chaque groupe imprimant côté verso (9A à 9D) ont un diamètre équivalent à deux fois le diamètre du cylindre porte-plaque respectif (6a, 6b) et le cylindre porte-blanchet (5a, 5b) a le même diamètre que le cylindre porte-plaque respectif (6a, 6b).
EP19980250349 1997-10-02 1998-09-30 Machine à imprimer à feuilles recto-verso Expired - Lifetime EP0906826B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP269482/97 1997-10-02
JP26948297 1997-10-02
JP9269482A JPH11105249A (ja) 1997-10-02 1997-10-02 両面刷枚葉輪転印刷機

Publications (3)

Publication Number Publication Date
EP0906826A2 EP0906826A2 (fr) 1999-04-07
EP0906826A3 EP0906826A3 (fr) 1999-10-20
EP0906826B1 true EP0906826B1 (fr) 2002-11-27

Family

ID=17473065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980250349 Expired - Lifetime EP0906826B1 (fr) 1997-10-02 1998-09-30 Machine à imprimer à feuilles recto-verso

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EP (1) EP0906826B1 (fr)
JP (1) JPH11105249A (fr)
DE (1) DE69809677T2 (fr)
ES (1) ES2190040T3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3427004B2 (ja) * 1999-04-20 2003-07-14 三菱重工業株式会社 枚葉両面印刷機
JP2003182031A (ja) 2001-12-14 2003-07-03 Komori Corp コーティング装置
JP4920237B2 (ja) 2005-10-24 2012-04-18 株式会社小森コーポレーション 印刷機の圧胴または搬送胴の被覆体
DE102009043118A1 (de) 2008-10-17 2010-04-22 Heidelberger Druckmaschinen Ag Druckmaschine zum Drucken auf beide Seiten von Bogen
DE102011116166A1 (de) 2010-11-11 2012-05-16 Heidelberger Druckmaschinen Ag Schön- und Widerdruckmaschine für Bogen ohne Wendung
JP6032782B2 (ja) 2010-12-03 2016-11-30 株式会社小森コーポレーション 銀行券印刷機
JP6061416B2 (ja) 2010-12-14 2017-01-18 株式会社小森コーポレーション 有価証券印刷機
WO2013039082A1 (fr) 2011-09-14 2013-03-21 株式会社小森コーポレーション Imprimante à combinaison
CN106739433A (zh) * 2016-11-18 2017-05-31 如皋市中罗印刷机械有限公司 一种书刊印刷机
PT3375610T (pt) 2017-03-14 2019-05-31 Kba Notasys Sa Máquina de impressão alimentada por folhas para a impressão simultânea de folhas, frente e verso, em particular para a produção de documentos de segurança

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5555804A (en) * 1993-06-25 1996-09-17 Akiyama Printing Machine Manufacturing Company Ltd. Perfecting sheet rotary offset press

Also Published As

Publication number Publication date
DE69809677T2 (de) 2003-09-18
ES2190040T3 (es) 2003-07-16
EP0906826A3 (fr) 1999-10-20
JPH11105249A (ja) 1999-04-20
EP0906826A2 (fr) 1999-04-07
DE69809677D1 (de) 2003-01-09

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