EP0776764A2 - Machine à impression hélio en mode continu - Google Patents

Machine à impression hélio en mode continu Download PDF

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Publication number
EP0776764A2
EP0776764A2 EP96203223A EP96203223A EP0776764A2 EP 0776764 A2 EP0776764 A2 EP 0776764A2 EP 96203223 A EP96203223 A EP 96203223A EP 96203223 A EP96203223 A EP 96203223A EP 0776764 A2 EP0776764 A2 EP 0776764A2
Authority
EP
European Patent Office
Prior art keywords
retractable
assemblage
impression
web
conveyance
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Withdrawn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
EP96203223A
Other languages
German (de)
English (en)
Other versions
EP0776764A3 (fr
Inventor
Jean c/o Eastman Kodak Company Xydias
Staniland Fred c/o Eastman Kodak Company Wochner
Charles Anthony c/o Eastman Kodak Co. Macaluso
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of EP0776764A2 publication Critical patent/EP0776764A2/fr
Publication of EP0776764A3 publication Critical patent/EP0776764A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F9/00—Rotary intaglio printing presses
    • B41F9/003—Web printing presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B41F13/34—Cylinder lifting or adjusting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F9/00—Rotary intaglio printing presses
    • B41F9/06—Details
    • B41F9/18—Auxiliary devices for exchanging forme cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2217/00—Printing machines of special types or for particular purposes
    • B41P2217/10—Printing machines of special types or for particular purposes characterised by their constructional features
    • B41P2217/13—Machines with double or multiple printing units for "flying" printing plates exchange

Definitions

  • the present invention relates to machines for conveying and processing web roll. More particularly, the invention concerns a continuously operating machine, such as a gravure printer, which conveys and processes web without having to terminate operation to accommodate a hardware changeover.
  • a continuously operating machine such as a gravure printer
  • a web is conveyed through a series of operations culminating in an image (for example a label) being transferred to the web.
  • a typical label printing operation in the photographic paper lamination industry uses several single modular printing machines arranged generally in line, each performing a cooperative single task like unwinding, laminating, drying, and so forth.
  • the application of the label to one side of the web is accomplished by first conveying the web from a feed stock roll into a image transfer nip formed by the contacting impression and print rollers. Once the image or label is transferred to the web, the transferred image is then exposed to a lamination step in which the selective label is laminated onto the web.
  • the print machine changeover process includes removing the existing or expired photographic paper stock roll as well as the print roller used for one printing task and then installing a fresh stock roll and different roller to accommodate the new printing task.
  • the aforementioned processes are enormously time consuming, costly and frequently they may present adverse safety risk factors to the operator.
  • US-A-5,069,125 discloses a gravure printing machine having two printing bays which relies on a print cylinder trolley to transport a print roller into a contacting position with a fixed impression roller at either of the printing bays to accommodate a certain printing task. While a wide range of printing applications are contemplated by this prior art development, this capability is achieved at the expense of enormous redundancy in components like idler rollers and drives that are very costly and not required for less demanding and less complex printing operations. More importantly, the aforementioned prior art printing machine requires several major redundant components including dual removable printer rollers, dual ink troughs and blades, arranged on separate trolley carts which enables a changeover in print task.
  • Another object of the invention is to provide a gravure printing machine that can accomplish one print task, and then, alternately undertake another print task without having to interrupt the machine operation.
  • first and second conveyance assemblages cooperate to provide continuos conveying and processing of a web.
  • a gravure printing machine has first and second printing means capable of cooperatively interchanging components to achieve one of two select print tasks.
  • a machine for continuously conveying and processing web comprising a frame having first and second conveyance assemblages arranged in different portions thereof.
  • the first conveyance assemblage comprises first and second surfaces mounted for at least partial contact and defining a first nip therebetween.
  • one of the first and second surfaces is retractable which enables the retracted surface to cooperate with the other assemblage for conveying a web, as described in details below.
  • the second assemblage comprise third surface arrange for at least partial contact with a fourth surfaces and thereby defining a second nip therebetween.
  • the machine of the invention includes means for selectively conveying the web between a travel path through the nip of either the first or second conveyance assemblage and one of the retractable third and fourth surfaces, or alternatively, either one of the first and second surfaces, respectively.
  • Machine 10 for continuously conveying and processing a web 1 , comprises a rigid frame 12 configured for supporting thereon first and second conveyance assemblages, or gravure printing means, 14 , 16 .
  • Gravure printing means 14 , 16 are arranged in a spaced relations on the frame 12 so that certain elements (described below) of first and second printing means 14 , 16 can alternately cooperate with each other in a manner described below.
  • first assemblage or gravure printing means, 14 comprises first and second surfaces 18 , 20 mounted for at least partial lengthwise contact with one another to form a nip, or image transfer nip, 26 , therebetween.
  • first surface 18 is a print roller and the second surface 20 is an impression roller.
  • the print roller 18 is generally fixed so as to enable at least a circumferential portion of print roller 18 to remain in continuous contact with a trough 22 containing a printing material, such as ink, 24 .
  • This arrangement allows ink to transfer to the print roller 18 and then transfer from the print roller 18 to the web 1 as it travels through the image transfer nip 26 .
  • Second surface, or preferably impression roller, 20 is retractably mounted to move transversally in the frame 12 in proximate lengthwise contact with the print roller.
  • Impression roller 20 is preferably a steel tubular shell covered with compliant elastomeric material that easily compresses when contacted by the print roller.
  • impression roller may be formed from other materials such as plastics, rubber or other metals, such as copper, nickel, and so forth
  • the footprint between the lengthwise contacting print and impression rollers, 18 , 20 defines a first image transfer nip 26 for producing both movement of the web 1 as it passes through the nip 26 , and more importantly, for transferring a preselected image to the web 1 .
  • Print roller 18 is provided with driving means, preferably an independent motor, which supplies the means for effecting the movement of web 1 through the image transfer nip 26 .
  • second conveyance assemblage, alternately second printing means, 16 arranged for at least partial cooperation with the first conveyance assemblage, alternately first printing means, 14 is arranged in another portion of the frame 12 .
  • Second assemblage 14 can alternately be used to perform a second print task, for example, printing logo X on web 1 , while the first assemblage 14 is performing its print task, for example, printing logo Y on web 1 .
  • second conveyance assemblage 16 comprises third and fourth surfaces 30 , 32 (preferably a print roller and impression roller, as described above) mounted for at least partial lengthwise contact.
  • fourth surface, alternately impression roller, 32 is retractable so that it can be used cooperatively with the first conveyance assemblage 14 forming a downstream web travel path therearound.
  • a servo hydraulic unit made by Rexroth Corp. from Bethlehem, Pennsylvania, is used to retract the fourth roller 32 away from the third roller 30 , as shown clearly in Figure 1.
  • impression roller 32 is depicted as an idler roller and cooperating with the first printing means of machine 10 .
  • Printing rollers 20 , 30 preferably made of metal, such as steel, have a predetermined image engraved on their radial surface 34 for contact with the compliant, elastomer covered impression roller radial surfaces 16 , 36 . As indicated, the two rollers at there point of contact form a respective image transfer nip 26 , 28 therebetween of some width dictated by regulated pressure applied by the servo hydraulic system 40 . Hydraulic system 40 further provides precise movement of the impression roller 20 , 32 away from its respective print roller 18 , 30 and image transfer nip 28 transversely along the frame 12 to any desired position. A secure stop is provided to prevent further movement of the impression roller once in its desired retracted position.
  • impression rollers 20 , 32 become idler rollers and provide an extended travel path for the web 1 for further downstream processing, such as lamination.
  • the second roller 20 of the first assemblage 14 is retracted away from the first print roller 28 and image transfer nip 26 to form a web travel path therearound, and the fourth roller 32 of the second assemblage is repositioned to contact the third roller 30 , thus establishing the start of the next printing task.
  • machine 10 depicts print roller 18 , retractable doctor blade 42 and retractable printing media trough 22 .
  • the retractable features of the invention enables these important components of machine 10 to be conveniently removed from the machine to accomplish hardware changeover.
  • Indepependent servo units and controllers may be used to retract the doctor blade and trough away from the printing machine; or the units may be manually retracted.
  • FIG 3 a flow diagram describing the control process of the invention for selectively conveying and processing a web, such as in either of the first or second gravure printing machines.
  • controller means provides the logic for retracting the impression roller of one printing means away from its corresponding image transfer nip while sequentially repositioning the impression roller of the other printing means in contact and alignment with its corresponding print roller of the other printing means. This sequence enables one print task to be undertaken on the active printing means while preparing to undertake a second print task on the idle printing means.
  • inactive gravure printing means 16 preparatory steps specified in 46 - 60 of Fig.
  • the gravure printing machine 10 of the invention fulfills the task of quick label change without having to stop for printer roller changeover.
  • One of the gravure printing means as described above, is in operation with the print roller and impression roller forming a nip at the point of contact.
  • the print roller from the other printing means remains in a stand-by mode and the impression roller provides a web travel path for the web being conveyed through the nip formed by the first and second rollers.
  • the stand-by impression roller becomes an idler roller for the web conveyed to the first printing means.
  • the stand-by gravure printing machine (Figs.
  • the impression roller 1 & 2 has the impression roller retracted away from the print roller via a servo hydraulic system that can maintain impression roller alignment to the print roller within allowable tolerance at any position.
  • This position is programmed into the PLC of the servo hydraulic system.
  • the impression roller in its stand-by position serves as an idler, which is also an important feature of this invention.
  • the operator To change print task, such as labels, the operator must simply raise the impression roller of the operating printing machine and lower the corresponding roller of the stand-by printing machine.
  • the stand-by printing machine prior to performing a select print task, then becomes the operating or active print machine when the above control process is executed during machine operations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
EP96203223A 1995-11-30 1996-11-18 Machine à impression hélio en mode continu Withdrawn EP0776764A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56549795A 1995-11-30 1995-11-30
US565497 1995-11-30

Publications (2)

Publication Number Publication Date
EP0776764A2 true EP0776764A2 (fr) 1997-06-04
EP0776764A3 EP0776764A3 (fr) 1998-04-01

Family

ID=24258878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96203223A Withdrawn EP0776764A3 (fr) 1995-11-30 1996-11-18 Machine à impression hélio en mode continu

Country Status (2)

Country Link
EP (1) EP0776764A3 (fr)
JP (1) JPH09183207A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005003206A1 (de) * 2005-01-24 2006-07-27 Gallus Ferd. Rüesch AG Tiefdruckwerk zum Bedrucken einer Bedruckstoffbahn in einer Druckmaschine
CN112537149A (zh) * 2020-12-03 2021-03-23 浙江聚众柔印科技有限公司 一种用于柔版印刷机的版辊放置台

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5069125A (en) 1988-10-05 1991-12-03 Schiavi Cesare Costruzioni Meccaniche S.P.A. Rotary gravure printing machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE599732C (de) * 1932-04-10 1934-07-07 Fallert & Co A G Vorrichtung zum Ein- und Anstellen oder Abstellen der Zylinder einer Rotationstiefdruckmaschine
US2746386A (en) * 1949-06-23 1956-05-22 E G Staude Mfg Company Inc Printing cylinder elevating means
US3789757A (en) * 1971-03-26 1974-02-05 Motter J Printing Press Co Printing press having automatic printing cylinder loading and unloading apparatus
ES8506410A1 (es) * 1983-05-31 1985-07-01 Fraver Sa Un procediminento para transportar y tratar o trabajar en continuo un soporte flexible deformable de preferencia virgen,tal como una cinta.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5069125A (en) 1988-10-05 1991-12-03 Schiavi Cesare Costruzioni Meccaniche S.P.A. Rotary gravure printing machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005003206A1 (de) * 2005-01-24 2006-07-27 Gallus Ferd. Rüesch AG Tiefdruckwerk zum Bedrucken einer Bedruckstoffbahn in einer Druckmaschine
CN112537149A (zh) * 2020-12-03 2021-03-23 浙江聚众柔印科技有限公司 一种用于柔版印刷机的版辊放置台

Also Published As

Publication number Publication date
EP0776764A3 (fr) 1998-04-01
JPH09183207A (ja) 1997-07-15

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