GB1141013A - Copying machine - Google Patents

Copying machine

Info

Publication number
GB1141013A
GB1141013A GB8939/66A GB893966A GB1141013A GB 1141013 A GB1141013 A GB 1141013A GB 8939/66 A GB8939/66 A GB 8939/66A GB 893966 A GB893966 A GB 893966A GB 1141013 A GB1141013 A GB 1141013A
Authority
GB
United Kingdom
Prior art keywords
original
image
sheet
rollers
exposure
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
GB8939/66A
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 GB1141013A publication Critical patent/GB1141013A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/041—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with variable magnification
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/045—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for charging or discharging distinct portions of the charge pattern on the recording material, e.g. for contrast enhancement or discharging non-image areas
    • G03G15/047—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for charging or discharging distinct portions of the charge pattern on the recording material, e.g. for contrast enhancement or discharging non-image areas for discharging non-image areas
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/28—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/04—Arrangements for exposing and producing an image
    • G03G2215/0429—Changing or enhancing the image
    • G03G2215/0431—Producing a clean non-image area, i.e. avoiding show-around effects
    • G03G2215/0434—Parameters defining the non-image area to be cleaned
    • G03G2215/0446—Magnification degree
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/04—Arrangements for exposing and producing an image
    • G03G2215/0429—Changing or enhancing the image
    • G03G2215/0431—Producing a clean non-image area, i.e. avoiding show-around effects
    • G03G2215/0448—Charge-erasing means for the non-image area
    • G03G2215/046—Charger

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)

Abstract

1,141,013. Photo-copiers. ADDRESSOGRAPH-MULTIGRAPH CORP. March 1, 1966 [March 16, 1965], No.8939/66. Headings G2A and G2H. Copying machine for producing an image on a copy sheet of a sheet original, the image differing in size from the original, comprises illuminating and exposure stations through which the original and copy sheets are passed respectively at a relative speed dependent upon the relative size of the original and image and at which the original is illuminated and a different sized image thereof is projected on to the copy sheet at the exposure station, a delay mechanism being provided to alter the relative time of arrival of the leading edges of the sheets at the exposure and illuminating station to control the position of the image on the copy sheet. An electrostatic copier for producing images of reduced size, the original and copy sheets are transported along parallel paths by coaxial pairs of rollers driven at the same angle velocity and having different diameters in accordance with the reduction in image size, the rollers being changed when the image reduction is changed. An inserted original is initially transported by rotating rollers 56, 52 until it trips a switch 98 which stops rotation of the rollers by de-energizing a clutch (168). After a predetermined time controlled by a time delay relay 182, clutch 168 is re-energized and brake 166 de-energized so that the original sheet is transported past a station 36 at which it is illuminated by a lamp 37 through filters 94, and then ejected. Tripping of switch 98 also energizes a clutch (96) for rollers 62, 66 which feed a copy sheet from a supply chamber 30 on nylon filament guides through charging, exposure, developing and fixing stations; the charging station 40 comprises corona discharge wires 108, 110 which apply a charge to both surfaces of the sheet, the area charge being adjustable by shields (114) - (120) and (114a) - (120a) controlled by rods (121); at the exposure station (42) light from the illuminated original is projected on to the copy sheet by an assembly 44 comprising perpendicular mirrors 128, 134 and a variable focal length lens 132.
GB8939/66A 1965-03-16 1966-03-01 Copying machine Expired GB1141013A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US440178A US3388644A (en) 1965-03-16 1965-03-16 Photoelectrostatic copying machine

Publications (1)

Publication Number Publication Date
GB1141013A true GB1141013A (en) 1969-01-22

Family

ID=23747748

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8939/66A Expired GB1141013A (en) 1965-03-16 1966-03-01 Copying machine

Country Status (2)

Country Link
US (1) US3388644A (en)
GB (1) GB1141013A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3708161A (en) * 1968-01-22 1973-01-02 Addressograph Multigraph Photoelectrostatic copying machine
US4116562A (en) * 1972-10-27 1978-09-26 International Business Machines Optical system featuring change in magnification by combined lens and mirror motion
US7315719B2 (en) * 2005-05-31 2008-01-01 Xerox Corporation Transfer charge device cover in non-image receiving medium area

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1344896A (en) * 1919-05-08 1920-06-29 August F Jobke Copying-camera
US1988390A (en) * 1931-03-12 1935-01-15 Emil Busch Ag Change-focus objective
US2292825A (en) * 1939-05-12 1942-08-11 Jr James J Dilks Photographic reproduction apparatus
US2358649A (en) * 1941-11-06 1944-09-19 Photostat Corp Photographic copying apparatus
US2752818A (en) * 1952-06-26 1956-07-03 Fairchild Camera Instr Co Photographic text correction machine
US2947217A (en) * 1955-05-12 1960-08-02 Int Standard Electric Corp Photographic control apparatus
DE1119108B (en) * 1960-03-30 1961-12-07 Photo Copie G M B H Continuous microfilm camera for taking photographs of flat originals
DE1174147B (en) * 1962-12-18 1964-07-16 Agfa Ag Optical equipment, in particular electrophotographic copier

Also Published As

Publication number Publication date
US3388644A (en) 1968-06-18

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