GB1477163A - Electrophotographic method and apparatus - Google Patents

Electrophotographic method and apparatus

Info

Publication number
GB1477163A
GB1477163A GB3423574A GB3423574A GB1477163A GB 1477163 A GB1477163 A GB 1477163A GB 3423574 A GB3423574 A GB 3423574A GB 3423574 A GB3423574 A GB 3423574A GB 1477163 A GB1477163 A GB 1477163A
Authority
GB
United Kingdom
Prior art keywords
photo
colour
aug
image
drum
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
GB3423574A
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.)
Canon Inc
Original Assignee
Canon 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
Priority claimed from JP48087369A external-priority patent/JPS5924418B2/en
Priority claimed from JP8910573A external-priority patent/JPS5041545A/ja
Application filed by Canon Inc filed Critical Canon Inc
Publication of GB1477163A publication Critical patent/GB1477163A/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
    • G03G15/04027—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 and forming half-tone image
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/01—Electrographic processes using a charge pattern for multicoloured copies
    • 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
    • G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • G03G15/0105—Details of unit
    • G03G15/011—Details of unit for exposing
    • G03G15/0115—Details of unit for exposing and forming a half-tone image

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)

Abstract

1477163 Photo-copying CANON KK 2 Aug 1974 [3 Aug 1973 8 Aug 1973] 34235/74 Heading G2A In a method of photo-copying using a photosensitive member comprising an insulating layer on a photo-conductive layer, the member is (a) uniformly charged, (b) imagewise exposed before, during or after uniform charging of opposite polarity of that of the primary charge, or uniformly discharged with A.C. and (c) exposed to a projected grid image. In a multi-colour line-by-line copier in which colour separation images are formed successively on a photo-conductive drum 14 having an outer insulative layer and are transferred successively in superimposed manner to a printing drum 50, each colour separation image is formed on drum 14 by the successive steps of (a) charging using D.C. charger 15, (b) projection of the colour separation image, using a colour filter disc 20, through an A.C. discharger 11 to point 12 and (c) projection of a grid image, using a respective one of a number of rotary grid cylinders 21-24 in which the grids are in discord with one another, as shown in Figs. 2-4, and a mirror 29, to point 16. Mirror is rotatable to select a particular filter cylinder.
GB3423574A 1973-08-03 1974-08-02 Electrophotographic method and apparatus Expired GB1477163A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP48087369A JPS5924418B2 (en) 1973-08-03 1973-08-03 Color electrophotography
JP8910573A JPS5041545A (en) 1973-08-08 1973-08-08

Publications (1)

Publication Number Publication Date
GB1477163A true GB1477163A (en) 1977-06-22

Family

ID=26428661

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3423574A Expired GB1477163A (en) 1973-08-03 1974-08-02 Electrophotographic method and apparatus

Country Status (1)

Country Link
GB (1) GB1477163A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048636A1 (en) * 1980-09-24 1982-03-31 Xerox Corporation Precession scanning apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048636A1 (en) * 1980-09-24 1982-03-31 Xerox Corporation Precession scanning apparatus

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19940801