GB1066964A - Reversal electrophotography - Google Patents

Reversal electrophotography

Info

Publication number
GB1066964A
GB1066964A GB3838163A GB3838163A GB1066964A GB 1066964 A GB1066964 A GB 1066964A GB 3838163 A GB3838163 A GB 3838163A GB 3838163 A GB3838163 A GB 3838163A GB 1066964 A GB1066964 A GB 1066964A
Authority
GB
United Kingdom
Prior art keywords
areas
layer
charged
toner
screen
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
GB3838163A
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB1066964A publication Critical patent/GB1066964A/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
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/02—Charge-receiving layers
    • G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)

Abstract

1,66,964. Electrophotographic processes. EASTMAN KODAK CO. Sept. 30, 1963 [Oct. 1, 1962], No. 38381/63. Heading G2H. In a reversal electrophotographic process, a photo-conductive layer 20, Fig. 4A, on a conductive support 21 is negatively charged by corona discharge 40. A half tone screen made up of opaque areas 41, Fig. 4B and clear areas 42 is placed in contact with layer 20, the opaque areas may be grid lines or uniform size dots of a half-tone screen. A negative 45, Fig. 4C, is then placed on the front surface of the screen 41, 42 and the layer 20 is imagewise exposed. Unexposed areas of the layer 20 remain charged while other areas 47 or 48 receive full exposure or partial exposure and are completely or partially discharged. The layer 20, Fig. 4D has partially charged areas, 23, 24, and 25 which receive toner 50, Fig. 4E, the least charged areas thus producing a reversal printed retaining the most toner, I.e. the areas of high electrostatic field. The toner is fixed by pressure, solvent or heat. The screen may be sharply focused on the photoconductive layer during exposure instead of being placed in contact therewith.
GB3838163A 1962-10-01 1963-09-30 Reversal electrophotography Expired GB1066964A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22798262A 1962-10-01 1962-10-01

Publications (1)

Publication Number Publication Date
GB1066964A true GB1066964A (en) 1967-04-26

Family

ID=22855261

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3838163A Expired GB1066964A (en) 1962-10-01 1963-09-30 Reversal electrophotography

Country Status (3)

Country Link
BE (1) BE638063A (en)
DE (1) DE1290815B (en)
GB (1) GB1066964A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2262424C2 (en) * 1971-12-24 1982-12-16 Research Laboratories of Australia Pty. Ltd., Eastwood, South Australia Electrophotographic process for the exposure of a charged photoconductive recording material

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE576367A (en) * 1958-03-05

Also Published As

Publication number Publication date
DE1290815B (en) 1969-03-13
BE638063A (en)

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