FR2426577A1 - Rotary lithographic duplicator moistening equipment - has moisture detection roller driven by ink receiving roller against variable torque (BR 4.12.79) - Google Patents

Rotary lithographic duplicator moistening equipment - has moisture detection roller driven by ink receiving roller against variable torque (BR 4.12.79)

Info

Publication number
FR2426577A1
FR2426577A1 FR7912925A FR7912925A FR2426577A1 FR 2426577 A1 FR2426577 A1 FR 2426577A1 FR 7912925 A FR7912925 A FR 7912925A FR 7912925 A FR7912925 A FR 7912925A FR 2426577 A1 FR2426577 A1 FR 2426577A1
Authority
FR
France
Prior art keywords
moisture
ink
detection roller
driven
ink receiving
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Withdrawn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
FR7912925A
Other languages
French (fr)
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.)
AB Dick Co
Original Assignee
Multigraphics Inc
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 Multigraphics Inc filed Critical Multigraphics Inc
Publication of FR2426577A1 publication Critical patent/FR2426577A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L39/00—Indicating, counting, warning, control, or safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0054—Devices for controlling dampening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/26—Damping devices using transfer rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L25/00—Devices for damping printing surfaces, e.g. moistening printing surfaces in connection with lithographic printing
    • B41L25/02—Devices for damping printing surfaces, e.g. moistening printing surfaces in connection with lithographic printing using friction rollers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)

Abstract

The moistening equipment is for a lithographic duplicator having a rotary plate cylinder. It incorporates a moisture-detectionroller with an absorbent surface (26), the moisture being transported to the plate on the cylinder by a mechanism including a roller with an ink-receiving surface, driven at a predetermined speed in proportion to that of the cylinder, and on which a continuous coating of lithographic ink is maintained. Moisture is supplied at a controlled rate to the detection roller, which is held against the ink-receiving roller so as to be driven from it via the ink and moisture, so that the speed of the detection roller is dependent on the amount of moisture. A resistive torque is applied to the detection roller, varying progressively with its speed of rotation, no mechanical friction being used.
FR7912925A 1978-05-22 1979-05-21 Rotary lithographic duplicator moistening equipment - has moisture detection roller driven by ink receiving roller against variable torque (BR 4.12.79) Withdrawn FR2426577A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US90835378A 1978-05-22 1978-05-22

Publications (1)

Publication Number Publication Date
FR2426577A1 true FR2426577A1 (en) 1979-12-21

Family

ID=25425647

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7912925A Withdrawn FR2426577A1 (en) 1978-05-22 1979-05-21 Rotary lithographic duplicator moistening equipment - has moisture detection roller driven by ink receiving roller against variable torque (BR 4.12.79)

Country Status (3)

Country Link
JP (1) JPS55296A (en)
BR (1) BR7903073A (en)
FR (1) FR2426577A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002047909A1 (en) * 2000-12-14 2002-06-20 Jean Lucien Sarda Method for improving the operating mode of dampening units of standard offset printing presses

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002047909A1 (en) * 2000-12-14 2002-06-20 Jean Lucien Sarda Method for improving the operating mode of dampening units of standard offset printing presses
FR2818190A1 (en) * 2000-12-14 2002-06-21 Jean Lucien Sarda METHOD FOR EXTENDING THE OPERATING MODE OF CONVENTIONAL WETTING GROUPS OF OFFSET PRINTING PRESSES

Also Published As

Publication number Publication date
JPS55296A (en) 1980-01-05
BR7903073A (en) 1979-12-04

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Legal Events

Date Code Title Description
ST Notification of lapse