GB2108688B - Electrophotographic copier - Google Patents

Electrophotographic copier

Info

Publication number
GB2108688B
GB2108688B GB08137972A GB8137972A GB2108688B GB 2108688 B GB2108688 B GB 2108688B GB 08137972 A GB08137972 A GB 08137972A GB 8137972 A GB8137972 A GB 8137972A GB 2108688 B GB2108688 B GB 2108688B
Authority
GB
United Kingdom
Prior art keywords
electrophotographic copier
copier
electrophotographic
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
GB08137972A
Other versions
GB2108688A (en
Inventor
Masato Ishida
Katsuyoshi Maeshima
Hisashi Sakamaki
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.)
Canon Inc
Original Assignee
Canon Inc
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 JP7930778A external-priority patent/JPS557709A/en
Priority claimed from JP8227678A external-priority patent/JPS559547A/en
Priority claimed from JP8227778A external-priority patent/JPS559548A/en
Priority claimed from JP8227378A external-priority patent/JPS559544A/en
Priority claimed from JP8227478A external-priority patent/JPS559545A/en
Priority claimed from JP8227578A external-priority patent/JPS559546A/en
Priority claimed from JP8868278A external-priority patent/JPS5515180A/en
Priority to GB08137972A priority Critical patent/GB2108688B/en
Application filed by Canon Inc filed Critical Canon Inc
Publication of GB2108688A publication Critical patent/GB2108688A/en
Publication of GB2108688B publication Critical patent/GB2108688B/en
Application granted granted Critical
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • G03B27/722—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus when the reproduction scale is changed
    • 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
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/043—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for controlling illumination or exposure

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
GB08137972A 1978-06-30 1981-12-16 Electrophotographic copier Expired GB2108688B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08137972A GB2108688B (en) 1978-06-30 1981-12-16 Electrophotographic copier

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP7930778A JPS557709A (en) 1978-06-30 1978-06-30 Exposure control unit of copying machine
JP8227778A JPS559548A (en) 1978-07-06 1978-07-06 Device having light source for exposure
JP8227378A JPS559544A (en) 1978-07-06 1978-07-06 Exposure control device
JP8227478A JPS559545A (en) 1978-07-06 1978-07-06 Exposure control device
JP8227678A JPS559547A (en) 1978-07-06 1978-07-06 Device having light source for exposure
JP8227578A JPS559546A (en) 1978-07-06 1978-07-06 Device having light source for exposure
JP8868278A JPS5515180A (en) 1978-07-20 1978-07-20 Copying apparatus
GB08137972A GB2108688B (en) 1978-06-30 1981-12-16 Electrophotographic copier

Publications (2)

Publication Number Publication Date
GB2108688A GB2108688A (en) 1983-05-18
GB2108688B true GB2108688B (en) 1983-10-26

Family

ID=27571211

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08137972A Expired GB2108688B (en) 1978-06-30 1981-12-16 Electrophotographic copier

Country Status (1)

Country Link
GB (1) GB2108688B (en)

Also Published As

Publication number Publication date
GB2108688A (en) 1983-05-18

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 19990624