GB1419590A - Electrophotographic image-forming method - Google Patents

Electrophotographic image-forming method

Info

Publication number
GB1419590A
GB1419590A GB6012273A GB6012273A GB1419590A GB 1419590 A GB1419590 A GB 1419590A GB 6012273 A GB6012273 A GB 6012273A GB 6012273 A GB6012273 A GB 6012273A GB 1419590 A GB1419590 A GB 1419590A
Authority
GB
United Kingdom
Prior art keywords
powder
toner
colourant
conductive
toner powder
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
GB6012273A
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Publication of GB1419590A publication Critical patent/GB1419590A/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
    • 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
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/34—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the powder image is formed directly on the recording material, e.g. by using a liquid toner
    • G03G15/342—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the powder image is formed directly on the recording material, e.g. by using a liquid toner by forming a uniform powder layer and then removing the non-image areas
    • 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
    • G03G5/12—Recording members for multicolour processes
    • 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
    • G03G9/09—Colouring agents for toner particles
    • G03G9/0928—Compounds capable to generate colouring agents by chemical reaction

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Fax Reproducing Arrangements (AREA)

Abstract

1419590 Electro-photographic process FUJI PHOTO FILM CO Ltd 28 Dec 1973 [28 Dec 1972] 60122/73 Heading G2H An imaging process comprises imagewise exposing to light a layer of charged photoconductive toner powder containing a colourant or colourant precursor on a conductive support, removing the discharged (exposed) toner powder to leave a toner image on said support, spreading a second powder over the image-carrying surface of said support while said toner powder forming said image possesses sufficient charge to repel said second powder from the unexposed areas, whereby said second powder adheres predominantly to the area where the toner powder is absent, and forming a colour in the toner powder using said colourant or said colourant precursor contained in said toner powder. The colourant is preferably a single composition that is coloured by heating, such as an organic salt of silver, copper or iron. Alternatively it may comprise two ingredients incorporated in two different photo-conductive powders which are mixed before use, or one may be in the core substance of the powder particles and the other in their surface layers, the two ingredients being reacted together in the colour forming step by means of a solvent or heat. Heat is used to fix both the toner image and the second powder which latter is preferably formed of similar or the same material as the core of the photo-conductive toner powder, and materials exemplified for one or both of these include polyamides, polyesters, polystyrene, a styrene/ methyl methacrylate copolymer, polymethyl methacrylate, and an epoxy resin. Zinc oxide is the exemplified photo-conductive constituent of the toner powder, but titanium dioxide or organic photo-conductive materials may be used. The conductive support may be a metal plate, a plastics film, a surface-metallized paper, or a paper, plastics or fabric material which has been treated with colloidal alumina or colloidal silica.
GB6012273A 1972-12-28 1973-12-28 Electrophotographic image-forming method Expired GB1419590A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48002422A JPS4990932A (en) 1972-12-28 1972-12-28

Publications (1)

Publication Number Publication Date
GB1419590A true GB1419590A (en) 1975-12-31

Family

ID=11528797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6012273A Expired GB1419590A (en) 1972-12-28 1973-12-28 Electrophotographic image-forming method

Country Status (3)

Country Link
JP (1) JPS4990932A (en)
DE (1) DE2365040A1 (en)
GB (1) GB1419590A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2347712A1 (en) * 1975-11-12 1977-11-04 Matsushita Electric Ind Co Ltd IMAGE FORMATION PROCESS AND APPARATUS AND PARTICLES USED FOR THE IMPLEMENTATION OF THIS PROCESS
JPS5260137A (en) * 1975-11-12 1977-05-18 Matsushita Electric Ind Co Ltd Method and apparatus for forming an image

Also Published As

Publication number Publication date
DE2365040A1 (en) 1974-07-11
JPS4990932A (en) 1974-08-30

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Legal Events

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