GB1287903A - - Google Patents

Info

Publication number
GB1287903A
GB1287903A GB5512569A GB5512569A GB1287903A GB 1287903 A GB1287903 A GB 1287903A GB 5512569 A GB5512569 A GB 5512569A GB 5512569 A GB5512569 A GB 5512569A GB 1287903 A GB1287903 A GB 1287903A
Authority
GB
United Kingdom
Prior art keywords
conductive
photo
development
vat
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
GB5512569A
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 filed Critical
Publication of GB1287903A publication Critical patent/GB1287903A/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
    • G03G13/06—Developing
    • 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
    • G03G13/22—Processes involving a combination of more than one step according to groups G03G13/02 - G03G13/20
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Wet Developing In Electrophotography (AREA)
  • Liquid Developers In Electrophotography (AREA)

Abstract

1287903 Electro-photographic reversal development FUJI PHOTO FILM CO Ltd 11 Nov 1969 [12 Nov 1968] 55125/69 Heading G2H A photo-conductive layer 2 on a conductive backing 1 is uniformly charged, imagewise exposed to form an electrostatic latent image of which the discharged area does not exceed 10% of the total image area and developed with toner particles charged to the same polarity as that of the latent image; the image being faced by a conductive electrode 3 during development which electrode is insulated from the conductive backing 1 and is not connected to any external potential source. Liquid or solid developer may be used. The photo-conductive element may be immersed in a conductive vat for development or in an insulating vat (17) Fig. 7, (not shown) having an electrode (18) embedded in its floor. Figs. 2, 4, 5, 6 (not shown) depict photo-conductive elements having adhesive tape, insulating resin etc. around their edges to prevent contact between the vat and the conductive backing. A preferred developer is made by mixing Microlith Blue (which comprises a blue pigment and a copolymer of vinyl chloride and vinyl acetate), a varnish (made by heating linseed oil and rosin-modified phenol-formaldehyde resin) and ethyl acetate. This mixture is then ultrasonically dispersed in a liquid comprising kerosene, cyclohexane and linseed oil. After development the image is preferably rinsed with Isopar (R.T.M.)
GB5512569A 1968-11-12 1969-11-11 Expired GB1287903A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8269668 1968-11-12

Publications (1)

Publication Number Publication Date
GB1287903A true GB1287903A (en) 1972-09-06

Family

ID=13781559

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5512569A Expired GB1287903A (en) 1968-11-12 1969-11-11

Country Status (6)

Country Link
US (1) US3655419A (en)
BE (1) BE741440A (en)
DE (1) DE1956492A1 (en)
FR (1) FR2023082A1 (en)
GB (1) GB1287903A (en)
NL (1) NL6916641A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4926901B1 (en) * 1970-12-10 1974-07-12
US3888666A (en) * 1971-12-22 1975-06-10 Rank Xerox Ltd Reversal developing method using photoconductive developing electrode
US3964436A (en) * 1974-04-08 1976-06-22 Scott Paper Company Electrophotographic development apparatus
US4278343A (en) * 1976-04-22 1981-07-14 Ricoh Co., Ltd. Inversion developing method for electrophotography and relevant apparatuses
US5051329A (en) * 1989-12-19 1991-09-24 Dximaging Reversal development of latent electrostatic images on xeroprinting masters

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2817598A (en) * 1955-02-01 1957-12-24 Haloid Co Continuous tone reversal development process
US2986521A (en) * 1958-03-28 1961-05-30 Rca Corp Reversal type electroscopic developer powder
BE591935A (en) * 1959-06-18
US3249088A (en) * 1963-04-03 1966-05-03 Scm Corp Developing tank unit for electrostatic printing
US3391082A (en) * 1965-04-06 1968-07-02 Koppers Co Inc Method of making xergographic toner compositions by emulsion polymerization
US3336906A (en) * 1965-06-09 1967-08-22 Fairchild Camera Instr Co Apparatus for immersion development
US3367791A (en) * 1966-07-11 1968-02-06 Addressograph Multigraph Liquid development of electrostatic images

Also Published As

Publication number Publication date
US3655419A (en) 1972-04-11
NL6916641A (en) 1970-05-14
DE1956492A1 (en) 1970-10-29
BE741440A (en) 1970-04-16
FR2023082A1 (en) 1970-08-07

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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