GB1267404A - Improvements in and relating to electro-photographic copying methods and arrangements - Google Patents

Improvements in and relating to electro-photographic copying methods and arrangements

Info

Publication number
GB1267404A
GB1267404A GB24180/69A GB2418069A GB1267404A GB 1267404 A GB1267404 A GB 1267404A GB 24180/69 A GB24180/69 A GB 24180/69A GB 2418069 A GB2418069 A GB 2418069A GB 1267404 A GB1267404 A GB 1267404A
Authority
GB
United Kingdom
Prior art keywords
electro
coating
liquid
insulating
image
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
GB24180/69A
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of GB1267404A publication Critical patent/GB1267404A/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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/10—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer
    • 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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/005—Materials for treating the recording members, e.g. for cleaning, reactivating, polishing
    • 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
    • G03G15/043—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 controlling illumination or exposure
    • G03G15/0435—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 controlling illumination or exposure by introducing an optical element in the optical path, e.g. a filter

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
  • Color Electrophotography (AREA)
  • Printing Methods (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Wet Developing In Electrophotography (AREA)

Abstract

1,267,404. Electro-photographic processes. RICOH K. K. May 12, 1969 [May 21, 1968], No. 24180/69. Heading G2H. A chargeless electro-photographic process comprises coating a photo-conductive sheet with an insulating liquid and thereafter imagewise exposing to produce an electrostatic latent image. The image may then be developed by toner in a liquid carrier. It is stated that such a coating process produces a soft tone developed image, whereas the prior art method of coating after exposure and before development produces a hard tone. Apparatus for selectively coating before or after exposure comprises rollers 9, 10 supported by a pivoted lever 8 and partially immersed in insulating-liquid tanks 6, 7. A sheet 4, transported by a suction carriage 5, is exposed at 4A; being pre- or after-treated with insulating liquid by operating a rod 8a.
GB24180/69A 1968-05-21 1969-05-12 Improvements in and relating to electro-photographic copying methods and arrangements Expired GB1267404A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3420668 1968-05-21

Publications (1)

Publication Number Publication Date
GB1267404A true GB1267404A (en) 1972-03-22

Family

ID=12407668

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24180/69A Expired GB1267404A (en) 1968-05-21 1969-05-12 Improvements in and relating to electro-photographic copying methods and arrangements

Country Status (6)

Country Link
US (1) US3674362A (en)
BE (1) BE733415A (en)
DE (1) DE1925516B2 (en)
FR (1) FR2009022A1 (en)
GB (1) GB1267404A (en)
NL (1) NL6907564A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4950942A (en) * 1972-09-14 1974-05-17
DE3062862D1 (en) * 1979-03-30 1983-06-01 Hoechst Ag Device for wetting electrophotographic material
JPS61177478A (en) * 1985-02-01 1986-08-09 Dainippon Screen Mfg Co Ltd Device for loading sheet material onto drum

Also Published As

Publication number Publication date
FR2009022A1 (en) 1970-01-30
DE1925516A1 (en) 1969-12-11
US3674362A (en) 1972-07-04
NL6907564A (en) 1969-11-25
DE1925516B2 (en) 1972-02-10
BE733415A (en) 1969-11-03

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