GB1456544A - Electrographic method and apparatus - Google Patents

Electrographic method and apparatus

Info

Publication number
GB1456544A
GB1456544A GB5428873A GB5428873A GB1456544A GB 1456544 A GB1456544 A GB 1456544A GB 5428873 A GB5428873 A GB 5428873A GB 5428873 A GB5428873 A GB 5428873A GB 1456544 A GB1456544 A GB 1456544A
Authority
GB
United Kingdom
Prior art keywords
image
nov
developed
slits
layer
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
GB5428873A
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 JP11754972A external-priority patent/JPS5544945B2/ja
Priority claimed from JP11755072A external-priority patent/JPS5540869B2/ja
Application filed by Canon Inc filed Critical Canon Inc
Publication of GB1456544A publication Critical patent/GB1456544A/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
    • G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • G03G15/0142—Structure of complete machines
    • G03G15/0147—Structure of complete machines using a single reusable electrographic recording member
    • G03G15/0152—Structure of complete machines using a single reusable electrographic recording member onto which the monocolour toner images are superposed before common transfer from the recording member
    • 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
    • G03G15/0142—Structure of complete machines
    • G03G15/0147—Structure of complete machines using a single reusable electrographic recording member
    • G03G15/0152—Structure of complete machines using a single reusable electrographic recording member onto which the monocolour toner images are superposed before common transfer from the recording member
    • G03G15/0163—Structure of complete machines using a single reusable electrographic recording member onto which the monocolour toner images are superposed before common transfer from the recording member primary transfer to the final recording medium

Abstract

1456544 Electrographic imaging CANON KK 22 Nov 1973 [22 Nov 1972 (2)] 54288/73 Heading G2H An electrographic process comprises forming two electrostatic latent images, to be developed in different colours, on an image-bearing member so as to have opposite polarity, the background being of substantially neutral polarity. The imagebearing member may have an electrically insulating layer, a photo-conductive layer and an electrically conductive layer, and the process may comprise the steps of (a) applying a uniform primary charge to the insulating layer (b) before, during or after step (a) exposing the layer to an image to be reproduced. (the image having a black area and another non-white coloured area) (c) uniformly applying a secondary charge of opposite polarity to said primary charge to said surface and (d) reexposing said surface to said image through a filter capable of intercepting said non-white colour. An overall light exposure may follow step (d). The surface may then be developed with a black toner and a toner of said other non-white colour. The two exposures may be conducted simultaneously with their respective charging steps by scanning an original bearing the image with two exposure slits and directing the beams 27 and 28 from these slits through caratrons 6 and 30 on to the surface 1. Subsequent overall light exposure is by means of lamp 7.
GB5428873A 1972-11-22 1973-11-22 Electrographic method and apparatus Expired GB1456544A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11754972A JPS5544945B2 (en) 1972-11-22 1972-11-22
JP11755072A JPS5540869B2 (en) 1972-11-22 1972-11-22

Publications (1)

Publication Number Publication Date
GB1456544A true GB1456544A (en) 1976-11-24

Family

ID=26455640

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5428873A Expired GB1456544A (en) 1972-11-22 1973-11-22 Electrographic method and apparatus

Country Status (3)

Country Link
DE (1) DE2358235C2 (en)
FR (1) FR2208142B1 (en)
GB (1) GB1456544A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2238628A (en) * 1989-11-28 1991-06-05 Kentek Information System Method and apparatus for printing two or more colors using an electrophotographic process

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4250239A (en) * 1977-06-09 1981-02-10 Ricoh Company, Ltd. Color electrostatographic process and material
JPS6028351B2 (en) * 1977-10-13 1985-07-04 株式会社リコー Two-color electrophotographic copying device
US4335194A (en) * 1978-02-20 1982-06-15 Ricoh Company, Ltd. Two color electrophotographic process and material
US4308821A (en) * 1978-09-22 1982-01-05 Ricoh Company, Ltd. Electrophotographic development apparatus
JPS56151976A (en) * 1980-04-26 1981-11-25 Ricoh Co Ltd Cleaning device for two color electrophotographic copying machine
EP0060621A3 (en) * 1981-02-25 1982-10-27 Rank Xerox Limited Electrophotographic printing
US4594302A (en) * 1984-05-31 1986-06-10 Mita Industrial Co., Ltd. Developing process for two-colored electrophotography

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3045644A (en) * 1957-06-06 1962-07-24 Xerox Corp Two-color electrostatic printing apparatus
US3702483A (en) * 1970-12-23 1972-11-07 Xerox Corp Color rendition method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2238628A (en) * 1989-11-28 1991-06-05 Kentek Information System Method and apparatus for printing two or more colors using an electrophotographic process

Also Published As

Publication number Publication date
DE2358235A1 (en) 1974-05-30
FR2208142A1 (en) 1974-06-21
FR2208142B1 (en) 1980-07-11
DE2358235C2 (en) 1983-04-21
AU6253173A (en) 1975-05-15

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Legal Events

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

Effective date: 19931121