GB1398576A - Exposure control apparatus for electrophotographic reproduction machines - Google Patents

Exposure control apparatus for electrophotographic reproduction machines

Info

Publication number
GB1398576A
GB1398576A GB4527672A GB4527672A GB1398576A GB 1398576 A GB1398576 A GB 1398576A GB 4527672 A GB4527672 A GB 4527672A GB 4527672 A GB4527672 A GB 4527672A GB 1398576 A GB1398576 A GB 1398576A
Authority
GB
United Kingdom
Prior art keywords
exposure
setting
copies
rotates
energizes
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
GB4527672A
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.)
Hoechst AG
Original Assignee
Hoechst AG
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 Hoechst AG filed Critical Hoechst AG
Publication of GB1398576A publication Critical patent/GB1398576A/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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Control Of Exposure In Printing And Copying (AREA)
  • Control Or Security For Electrophotography (AREA)
GB4527672A 1971-10-04 1972-10-02 Exposure control apparatus for electrophotographic reproduction machines Expired GB1398576A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712149404 DE2149404B2 (de) 1971-10-04 1971-10-04 Belichtungseinrichtung fuer elektrophotographische reproduktionsgeraete

Publications (1)

Publication Number Publication Date
GB1398576A true GB1398576A (en) 1975-06-25

Family

ID=5821379

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4527672A Expired GB1398576A (en) 1971-10-04 1972-10-02 Exposure control apparatus for electrophotographic reproduction machines

Country Status (7)

Country Link
US (1) US3771867A (enrdf_load_stackoverflow)
JP (1) JPS5534422B2 (enrdf_load_stackoverflow)
AU (1) AU461626B2 (enrdf_load_stackoverflow)
DE (1) DE2149404B2 (enrdf_load_stackoverflow)
FR (1) FR2155559A5 (enrdf_load_stackoverflow)
GB (1) GB1398576A (enrdf_load_stackoverflow)
NL (1) NL7212953A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136945A (en) 1975-10-14 1979-01-30 Eastman Kodak Company Electrophotographic apparatus having compensation for changes in sensitometric properties of photoconductors

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS502548A (enrdf_load_stackoverflow) * 1973-05-08 1975-01-11
US3967895A (en) * 1974-09-18 1976-07-06 Xerox Corporation Illumination control system
DE2528925A1 (de) * 1975-06-28 1977-01-13 Agfa Gevaert Ag Fotokopiergeraet
JPS5229225A (en) * 1975-08-29 1977-03-04 Ricoh Co Ltd Exposure adjustable device of an automatic return type
JPS5841497B2 (ja) * 1976-05-31 1983-09-12 ミノルタ株式会社 スリット露光型複写機における露光量調整装置
IT1085310B (it) * 1977-02-02 1985-05-28 Grafosol Spa Dispositivo di illuminazione e regolazione della quantita' di luce,per macchine per la preparazione di matrici da stampa per via elettrostatica
JPS5442149A (en) * 1977-09-09 1979-04-03 Canon Inc Image former
DE2839076C3 (de) * 1977-09-09 1998-01-29 Canon Kk Kopiergerät
JPS5492223A (en) * 1977-12-29 1979-07-21 Konishiroku Photo Ind Co Ltd Magnification variable type copier of automatic return type
DE2916243A1 (de) * 1978-04-25 1979-11-08 Iwatsu Electric Co Ltd Belichtungsvorrichtung fuer eine elektrographische kopiervorrichtung
JPS557709A (en) * 1978-06-30 1980-01-19 Canon Inc Exposure control unit of copying machine
DE2954647C2 (de) * 1978-06-30 1994-03-03 Canon Kk Kopiergerät mit einstellbarer Lichtquellenleistung
GB2024438B (en) 1978-06-30 1983-04-27 Canon Kk Electrophotographic copier
JPS55101965A (en) * 1979-01-30 1980-08-04 Ricoh Co Ltd Aperture control unit in variable power copying machine
JPS5621165A (en) * 1979-07-28 1981-02-27 Mita Ind Co Ltd Exposure adjusting device of electrostatic type copying machine
JPS56164365A (en) * 1980-05-23 1981-12-17 Fuji Xerox Co Ltd Exposure adjusting device for copying machine
JPS576870A (en) * 1980-06-13 1982-01-13 Minolta Camera Co Ltd Operating device
JPS61121760U (enrdf_load_stackoverflow) * 1985-01-17 1986-07-31
JPS61119160U (enrdf_load_stackoverflow) * 1985-12-19 1986-07-28
US5036552A (en) * 1990-02-22 1991-08-06 Deakyne Ralph V Fastener
US7344255B2 (en) * 2004-04-01 2008-03-18 Nisca Corporation Light amount adjusting apparatus and projector using the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3107578A (en) * 1959-12-05 1963-10-22 Agfa Ag Filter-operating arrangement for a photographic printing apparatus
GB1074583A (en) * 1963-01-23 1967-07-05 Eastman Kodak Co Sheet-handling apparatus
US3602579A (en) * 1969-11-17 1971-08-31 Film Editing Equipment Corp Electromechanical light valve system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136945A (en) 1975-10-14 1979-01-30 Eastman Kodak Company Electrophotographic apparatus having compensation for changes in sensitometric properties of photoconductors

Also Published As

Publication number Publication date
DE2149404B2 (de) 1976-09-30
DE2149404A1 (de) 1973-04-12
NL7212953A (enrdf_load_stackoverflow) 1973-04-06
AU461626B2 (en) 1975-05-29
US3771867A (en) 1973-11-13
JPS4846341A (enrdf_load_stackoverflow) 1973-07-02
JPS5534422B2 (enrdf_load_stackoverflow) 1980-09-06
AU4732672A (en) 1974-04-11
FR2155559A5 (enrdf_load_stackoverflow) 1973-05-18

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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