GB1529590A - Manufacture of printing rollers - Google Patents

Manufacture of printing rollers

Info

Publication number
GB1529590A
GB1529590A GB4200276A GB4200276A GB1529590A GB 1529590 A GB1529590 A GB 1529590A GB 4200276 A GB4200276 A GB 4200276A GB 4200276 A GB4200276 A GB 4200276A GB 1529590 A GB1529590 A GB 1529590A
Authority
GB
United Kingdom
Prior art keywords
drum
head
original
video signal
pulses
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
Application number
GB4200276A
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.)
LEATHLEY PUBLICATIONS Ltd
Original Assignee
LEATHLEY PUBLICATIONS Ltd
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 LEATHLEY PUBLICATIONS Ltd filed Critical LEATHLEY PUBLICATIONS Ltd
Priority to GB4200276A priority Critical patent/GB1529590A/en
Publication of GB1529590A publication Critical patent/GB1529590A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
    • B41C1/05—Heat-generating engraving heads, e.g. laser beam, electron beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B7/00—Machines, apparatus or hand tools for branding, e.g. using radiant energy such as laser beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/387—Composing, repositioning or otherwise geometrically modifying originals
    • H04N1/393—Enlarging or reducing

Abstract

1529590 Forming printing rollers LEATHLEY PUBLICATIONS Ltd 7 Oct 1977 [8 Oct 1976] 42002/76 Heading H4F A copy of an original is engraved by a laser on a print roller such that the copy occupies the whole of the circumference of the roller. When the original is mounted on a drum its ends may be circumferentially spaced. The original is scanned by a read head moved stepwise parallel to the rotating drum. The video signal from the head, representing the scan during a single revolution of the drum, is written in to a store under the control of pulses related to the rotation of the drum and the axial position of the head. Two stores are provided, used alternately. The stored video signal is augmented by pulses which have the effect of lengthening the signal so that the lengthened video signal corresponds to one full revolution of the drum rather than to the circumferential length of the original. The stores are read out to the laser write head under the control of pulses related to rotational position of the rotating print roller as the head is moved parallel to it.
GB4200276A 1977-10-07 1977-10-07 Manufacture of printing rollers Expired GB1529590A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4200276A GB1529590A (en) 1977-10-07 1977-10-07 Manufacture of printing rollers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4200276A GB1529590A (en) 1977-10-07 1977-10-07 Manufacture of printing rollers

Publications (1)

Publication Number Publication Date
GB1529590A true GB1529590A (en) 1978-10-25

Family

ID=10422386

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4200276A Expired GB1529590A (en) 1977-10-07 1977-10-07 Manufacture of printing rollers

Country Status (1)

Country Link
GB (1) GB1529590A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030282A1 (en) * 1979-12-06 1981-06-17 International Business Machines Corporation Electrophotographic copier with reduction mode facility and control of scanning carriage
WO1992002859A1 (en) * 1990-07-27 1992-02-20 Zed Instruments Limited Printing member
US5262275A (en) * 1992-08-07 1993-11-16 E. I. Du Pont De Nemours And Company Flexographic printing element having an IR ablatable layer and process for making a flexographic printing plate
EP0671260A1 (en) * 1994-02-25 1995-09-13 Eastman Kodak Company Method for engraving a gravure cylinder
US5719009A (en) * 1992-08-07 1998-02-17 E. I. Du Pont De Nemours And Company Laser ablatable photosensitive elements utilized to make flexographic printing plates
US6238837B1 (en) 1995-05-01 2001-05-29 E.I. Du Pont De Nemours And Company Flexographic element having an infrared ablatable layer
US6605410B2 (en) 1993-06-25 2003-08-12 Polyfibron Technologies, Inc. Laser imaged printing plates

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030282A1 (en) * 1979-12-06 1981-06-17 International Business Machines Corporation Electrophotographic copier with reduction mode facility and control of scanning carriage
WO1992002859A1 (en) * 1990-07-27 1992-02-20 Zed Instruments Limited Printing member
US5262275A (en) * 1992-08-07 1993-11-16 E. I. Du Pont De Nemours And Company Flexographic printing element having an IR ablatable layer and process for making a flexographic printing plate
US5719009A (en) * 1992-08-07 1998-02-17 E. I. Du Pont De Nemours And Company Laser ablatable photosensitive elements utilized to make flexographic printing plates
US6605410B2 (en) 1993-06-25 2003-08-12 Polyfibron Technologies, Inc. Laser imaged printing plates
EP0671260A1 (en) * 1994-02-25 1995-09-13 Eastman Kodak Company Method for engraving a gravure cylinder
US6238837B1 (en) 1995-05-01 2001-05-29 E.I. Du Pont De Nemours And Company Flexographic element having an infrared ablatable layer
US6558876B1 (en) 1995-05-01 2003-05-06 E. I. Du Pont De Nemours And Company Process for making a flexographic printing plate
US6929898B2 (en) 1995-05-01 2005-08-16 E. I. Du Pont De Nemours And Company Flexographic element having an infrared ablatable layer

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee