GB1584424A - Electrographic apparatus comprising imaging system - Google Patents

Electrographic apparatus comprising imaging system Download PDF

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Publication number
GB1584424A
GB1584424A GB34854/77A GB3485477A GB1584424A GB 1584424 A GB1584424 A GB 1584424A GB 34854/77 A GB34854/77 A GB 34854/77A GB 3485477 A GB3485477 A GB 3485477A GB 1584424 A GB1584424 A GB 1584424A
Authority
GB
United Kingdom
Prior art keywords
triac
control means
light source
image
unijunction transistor
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
GB34854/77A
Other languages
English (en)
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of GB1584424A publication Critical patent/GB1584424A/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
    • G03G15/04—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)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
GB34854/77A 1976-08-24 1977-08-19 Electrographic apparatus comprising imaging system Expired GB1584424A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10085976A JPS5328428A (en) 1976-08-24 1976-08-24 Light control for electrophoto graphic copier

Publications (1)

Publication Number Publication Date
GB1584424A true GB1584424A (en) 1981-02-11

Family

ID=14285028

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34854/77A Expired GB1584424A (en) 1976-08-24 1977-08-19 Electrographic apparatus comprising imaging system

Country Status (6)

Country Link
US (1) US4193679A (enExample)
JP (1) JPS5328428A (enExample)
CA (1) CA1105983A (enExample)
DE (1) DE2738017A1 (enExample)
FR (1) FR2363137A1 (enExample)
GB (1) GB1584424A (enExample)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS559545A (en) * 1978-07-06 1980-01-23 Canon Inc Exposure control device
US4474453A (en) * 1979-04-18 1984-10-02 Ricoh Company, Ltd. Electrostatic copying apparatus
US4316665A (en) * 1979-12-06 1982-02-23 Canon Kabushiki Kaisha Projection device
JPS56156841A (en) * 1980-05-09 1981-12-03 Toshiba Corp Electronic copying machine
DE3035550A1 (de) * 1980-09-20 1982-04-29 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Belichtungseinheit
US4382672A (en) * 1980-09-29 1983-05-10 Xerox Corporation Illumination arrangement for elimination of gray borders in copying device
US4345833A (en) * 1981-02-23 1982-08-24 American Optical Corporation Lens array
US4462662A (en) * 1981-06-15 1984-07-31 Xerox Corporation Imaging system utilizing a gradient index lens array compensated for non-uniform object illumination
JPS5979240A (ja) * 1982-10-29 1984-05-08 Hitachi Ltd 複写機の露光制御装置
JPS5971342U (ja) * 1982-11-04 1984-05-15 シャープ株式会社 光量調整装置
US4494855A (en) * 1984-03-07 1985-01-22 Colwill Richard H Synchronous copying and collating system
JPS61149972A (ja) * 1984-12-25 1986-07-08 Ricoh Co Ltd カラ−複写方法
JPS63259533A (ja) * 1987-04-16 1988-10-26 Fuji Photo Film Co Ltd 画像記録装置
US4801978A (en) * 1987-12-30 1989-01-31 Xerox Corporation Image bar printer compensated for vibration-generated scan line errors
JP2524126Y2 (ja) * 1991-05-17 1997-01-29 セイコープレシジョン株式会社 インスタント写真式複写装置
US5303000A (en) * 1991-06-07 1994-04-12 Agfa-Gevaert Aktiengesellschaft Method of and apparatus for ascertaining the characteristics of shorter and longer sections of photographic material
US5450157A (en) * 1993-12-06 1995-09-12 Xerox Corporation Imaging system using a gradient index lens array with improved depth of focus
US7035575B2 (en) * 2003-04-16 2006-04-25 Ricoh Company, Ltd. Developing device, image forming apparatus, and process cartridge
JP4393900B2 (ja) * 2003-06-26 2010-01-06 株式会社リコー 現像装置、画像形成装置、プロセスカートリッジ及び現像方法
JP4672243B2 (ja) * 2003-06-27 2011-04-20 株式会社リコー 現像装置及び画像形成装置
US7162187B2 (en) * 2003-06-30 2007-01-09 Ricoh Company, Ltd. Image forming apparatus and image forming method

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3423153A (en) * 1966-01-14 1969-01-21 American Photocopy Equip Co Control of light level in photocopy machine
US3409354A (en) * 1966-06-08 1968-11-05 Eastman Kodak Co Optical systems with axial mirrors
US3815992A (en) * 1969-10-30 1974-06-11 Minolta Camera Kk Projection type duplicator
JPS511970B1 (enExample) * 1969-12-12 1976-01-22
US3742295A (en) * 1970-03-30 1973-06-26 Minolta Camera Kk Lighting system in copying apparatus
US3764210A (en) * 1970-11-03 1973-10-09 Minolta Camera Kk A lighting system for a halogen lamp in a duplicating machine
US3731611A (en) * 1972-02-11 1973-05-08 Copystatics Manuf Corp Exposure control system for reproduction devices
JPS5068583U (enExample) * 1973-10-22 1975-06-18
JPS5744350Y2 (enExample) * 1973-11-07 1982-09-30

Also Published As

Publication number Publication date
DE2738017A1 (de) 1978-03-02
US4193679A (en) 1980-03-18
FR2363137A1 (fr) 1978-03-24
JPS5328428A (en) 1978-03-16
CA1105983A (en) 1981-07-28
FR2363137B1 (enExample) 1982-03-12

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940819