GB1231940A - - Google Patents

Info

Publication number
GB1231940A
GB1231940A GB1231940DA GB1231940A GB 1231940 A GB1231940 A GB 1231940A GB 1231940D A GB1231940D A GB 1231940DA GB 1231940 A GB1231940 A GB 1231940A
Authority
GB
United Kingdom
Prior art keywords
developer
copolymer
diethylaminoethyl
napthenate
exposure
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
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 GB1231940A publication Critical patent/GB1231940A/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
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/12—Developers with toner particles in liquid developer mixtures
    • 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
    • G03G9/12—Developers with toner particles in liquid developer mixtures
    • G03G9/13—Developers with toner particles in liquid developer mixtures characterised by polymer components
    • G03G9/131—Developers with toner particles in liquid developer mixtures characterised by polymer components obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • G03G9/12—Developers with toner particles in liquid developer mixtures
    • G03G9/13—Developers with toner particles in liquid developer mixtures characterised by polymer components
    • G03G9/132—Developers with toner particles in liquid developer mixtures characterised by polymer components obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Liquid Developers In Electrophotography (AREA)
  • Photoreceptors In Electrophotography (AREA)

Abstract

1,231,940. Chargeless electro-photographic processes. RICOH K. K. May 29, 1969 [June 7, 1968], No.27267/69. Heading G2H. A chargeless electro-photographic process comprises firstly determining the boundary exposure Em, of the photo-conductive copy material for a given developer by plotting amount of exposure against density of developed image: Em being defined as the exposure required for maximum image density with the given developer. Exposures greater than Em produce images of the opposite polarity to those formed by exposures below Em and thus, for a given developer, both positives and negatives of an original can be made by exposing to the appropriate quantity of light (visible ultraviolet or infrared) and developing. The developer may comprise a kneaded mixture of a pigment, e. g. carbon black, with an alkyd resin (or octadecylmethacrylate-vinyl diethylaminoethyl ether copolymer, or vinyldodecyl etherdibutylaminoethyl methacrylate copolymer, or dodecyl methacrylate-styrene-diethylaminoethyl methacrylate copolymer), dispersed in a petroleum hydrocarbon carrier or the developer may comprise pigment, an alkyd resin, (or octadecylmethacrylate-vinyl diethylaminoethyl copolymer, or dodecyl methacrylate-styrene-diethylaminoethyl methacrylate copolymer) and a metal salt of a fatty acid (e.g. manganese napthenate, cobalt napthenate, calcium napthenate, zinc stearate), dispersed in a petroleum hydrocarbon carrier.
GB1231940D 1968-06-07 1969-05-29 Expired GB1231940A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3914568 1968-06-07

Publications (1)

Publication Number Publication Date
GB1231940A true GB1231940A (en) 1971-05-12

Family

ID=12544925

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1231940D Expired GB1231940A (en) 1968-06-07 1969-05-29

Country Status (5)

Country Link
BE (1) BE734174A (en)
DE (1) DE1929133A1 (en)
FR (1) FR2010374A1 (en)
GB (1) GB1231940A (en)
NL (1) NL6908636A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2154313C3 (en) * 1971-11-02 1981-07-02 Hoechst Ag, 6230 Frankfurt Electrostatographic recording process
EP0250653B1 (en) * 1986-07-01 1992-02-05 Agfa-Gevaert N.V. Electrophotographic method for reversal or positive-positive image formation

Also Published As

Publication number Publication date
BE734174A (en) 1969-11-17
DE1929133A1 (en) 1969-12-11
FR2010374A1 (en) 1970-02-13
NL6908636A (en) 1969-12-09

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee