GB1423793A - Colour electrophotographic method - Google Patents

Colour electrophotographic method

Info

Publication number
GB1423793A
GB1423793A GB473474A GB473474A GB1423793A GB 1423793 A GB1423793 A GB 1423793A GB 473474 A GB473474 A GB 473474A GB 473474 A GB473474 A GB 473474A GB 1423793 A GB1423793 A GB 1423793A
Authority
GB
United Kingdom
Prior art keywords
colour
sheet
corona
image
adjustment
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
GB473474A
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of GB1423793A publication Critical patent/GB1423793A/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
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/01—Electrographic processes using a charge pattern for multicoloured copies

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Color Electrophotography (AREA)
  • Wet Developing In Electrophotography (AREA)

Abstract

1423793 Multi-colour electrophotography HITACHI Ltd 1 Feb 1974 [5 Feb 1973] 04734/74 Heading G2H In a process in which a photo-conductive sheet 12 is charged, exposed to a light image through a first colour filter 68, and developed to produce an image in a first complementary colour which is then fixed, and the process is repeated a number of times corresponding to the number of colour separations desired, in the charging step in each image-forming process the sheet 12 is charged to a potential close to its saturation value. The potential required to produce saturation increases for the second and subsequent image-forming processes, and is obtained by having a stepwise adjustable high voltage DC supply 100 connected to the electrode 32 of a corona discharge device 30, as shown, or may be obtained by adjustment of the value of a leak resistance connected to a control grid of a corona device, by adjustment of the speed of rotation of the drum 10 carrying the sheet 12 to vary its time of exposure to the corona, or by adjustment of the distance between the corona device 30 and the sheet 12. The developing device 40 includes a reservoir 41-44 and an applicator roller 45-48 respectively for each colour and is movable to bring the appropriate colour into position as required. A roller 70 with a cleaning pad 72 both removes developer carrier liquid from the sheet 12 and fixes the developed images.
GB473474A 1973-02-05 1974-02-01 Colour electrophotographic method Expired GB1423793A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1374273A JPS5518901B2 (en) 1973-02-05 1973-02-05

Publications (1)

Publication Number Publication Date
GB1423793A true GB1423793A (en) 1976-02-04

Family

ID=11841700

Family Applications (1)

Application Number Title Priority Date Filing Date
GB473474A Expired GB1423793A (en) 1973-02-05 1974-02-01 Colour electrophotographic method

Country Status (5)

Country Link
US (1) US3928033A (en)
JP (1) JPS5518901B2 (en)
DE (1) DE2405287A1 (en)
FR (1) FR2216609B1 (en)
GB (1) GB1423793A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0103843A1 (en) * 1982-09-20 1984-03-28 Coulter Systems Corporation Method of making color images
EP0175392A1 (en) * 1984-09-26 1986-03-26 Ishihara Sangyo Kaisha, Ltd. Method of color electrophotography
WO2005031373A1 (en) * 2003-09-19 2005-04-07 Siemens Aktiengesellschaft Electric power supply for electronic units with a high voltage potential

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5926957B2 (en) * 1973-12-28 1984-07-02 キヤノン株式会社 Color electrophotographic method
AU531992B2 (en) * 1979-03-26 1983-09-15 Coulter Systems Corp. Color printing
JPS57111553A (en) * 1980-12-27 1982-07-12 Canon Inc Color image forming apparatus
DE3370382D1 (en) * 1982-12-28 1987-04-23 Toshiba Kk Electrophotographic method and apparatus
US4510223A (en) * 1983-02-07 1985-04-09 Coulter Systems Corporation Multicolor electrophotographic imaging process
JPS6015653A (en) * 1983-07-08 1985-01-26 Toshiba Corp Electrophotographic method
JPS60209754A (en) * 1984-04-04 1985-10-22 Fuji Xerox Co Ltd Color electrophotographic forming method of electrostatic latent image
US4725867A (en) * 1986-05-01 1988-02-16 Eastman Kodak Company Apparatus for forming a multi-color image on an electrophotographic element which is sensitive to light outside the visible spectrum
US4654282A (en) * 1986-05-01 1987-03-31 Eastman Kodak Company Plural electrophotographic toned image method
US4650734A (en) * 1986-06-09 1987-03-17 Eastman Kodak Company Color filter elements and electrophotographic method of making same
EP0601933A3 (en) * 1992-12-10 1994-12-14 Minnesota Mining & Mfg Electrophotographic color proofing system for gravure printed images.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4923905B1 (en) * 1970-10-31 1974-06-19
US3729311A (en) * 1971-07-15 1973-04-24 Xerox Corp Electrostatic transfer method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0103843A1 (en) * 1982-09-20 1984-03-28 Coulter Systems Corporation Method of making color images
EP0175392A1 (en) * 1984-09-26 1986-03-26 Ishihara Sangyo Kaisha, Ltd. Method of color electrophotography
WO2005031373A1 (en) * 2003-09-19 2005-04-07 Siemens Aktiengesellschaft Electric power supply for electronic units with a high voltage potential

Also Published As

Publication number Publication date
FR2216609B1 (en) 1977-03-04
FR2216609A1 (en) 1974-08-30
JPS5518901B2 (en) 1980-05-22
JPS49104637A (en) 1974-10-03
DE2405287A1 (en) 1974-08-08
US3928033A (en) 1975-12-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee