GB793331A - Improvements in electrostatic printing - Google Patents

Improvements in electrostatic printing

Info

Publication number
GB793331A
GB793331A GB1421/56A GB142156A GB793331A GB 793331 A GB793331 A GB 793331A GB 1421/56 A GB1421/56 A GB 1421/56A GB 142156 A GB142156 A GB 142156A GB 793331 A GB793331 A GB 793331A
Authority
GB
United Kingdom
Prior art keywords
core
earthed
produced
image
insulating liquid
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
GB1421/56A
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.)
General Dynamics Corp
Original Assignee
General Dynamics Corp
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 US486995A external-priority patent/US2890174A/en
Priority claimed from US486806A external-priority patent/US2913353A/en
Application filed by General Dynamics Corp filed Critical General Dynamics Corp
Publication of GB793331A publication Critical patent/GB793331A/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
    • G03G15/101—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer for wetting the recording material
    • 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
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/12—Developers with toner particles in liquid developer mixtures
    • G03G9/135—Developers with toner particles in liquid developer mixtures characterised by stabiliser or charge-controlling agents

Landscapes

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

Abstract

793,331. Electrophotography. GENERAL DYNAMICS CORPORATION. Jan. 16, 1956 [Feb. 8, 1955], No. 1421/56. Class 98(2) An electrostatic latent image on a photoconductive material 14 disposed on a conductive backing 12 is developed either to a positive or negative by passing the photoconductive surface, while the backing is earthed, across a roller comprising a semiconductor surface 30 on a conductive core 28 and rotating in an earthed developer bath 20 containing developer particles suspended in an insulating liquid, a positive image being produced by earthing the core 28 via switch 34 and a negative image being produced by opening switch 34 so that the core 28 is insulated from earth. The developer particles may be charcoal, coal, coloured glass or resins and the insulating liquid may be a hydrocarbon or chlorinated hydrocarbon. Specification 755,486 is referred to.
GB1421/56A 1955-02-08 1956-01-16 Improvements in electrostatic printing Expired GB793331A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US486995A US2890174A (en) 1955-02-08 1955-02-08 Xerographic developer composition
US486806A US2913353A (en) 1955-02-08 1955-02-08 Method and apparatus for developing electrostatic image

Publications (1)

Publication Number Publication Date
GB793331A true GB793331A (en) 1958-04-16

Family

ID=27048810

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1421/56A Expired GB793331A (en) 1955-02-08 1956-01-16 Improvements in electrostatic printing

Country Status (1)

Country Link
GB (1) GB793331A (en)

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