DE3425572C2 - Kopiergerät - Google Patents

Kopiergerät

Info

Publication number
DE3425572C2
DE3425572C2 DE3425572A DE3425572A DE3425572C2 DE 3425572 C2 DE3425572 C2 DE 3425572C2 DE 3425572 A DE3425572 A DE 3425572A DE 3425572 A DE3425572 A DE 3425572A DE 3425572 C2 DE3425572 C2 DE 3425572C2
Authority
DE
Germany
Prior art keywords
magnification
voltage
signal
voltage generator
circuit
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
DE3425572A
Other languages
German (de)
English (en)
Other versions
DE3425572A1 (de
Inventor
Hideshi Kawasaki Oushiden
Takeshi Tokio/Tokyo Sanbayashi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Publication of DE3425572A1 publication Critical patent/DE3425572A1/de
Application granted granted Critical
Publication of DE3425572C2 publication Critical patent/DE3425572C2/de
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
    • G03G15/041—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 variable magnification
    • G03G15/0415—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 variable magnification and means for controlling illumination or exposure
    • 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
    • G03G15/041—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 variable magnification

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)
  • Control Of Exposure In Printing And Copying (AREA)
DE3425572A 1983-07-11 1984-07-11 Kopiergerät Expired DE3425572C2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58125945A JPS6017438A (ja) 1983-07-11 1983-07-11 露光制御装置

Publications (2)

Publication Number Publication Date
DE3425572A1 DE3425572A1 (de) 1985-01-31
DE3425572C2 true DE3425572C2 (de) 1987-02-26

Family

ID=14922857

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3425572A Expired DE3425572C2 (de) 1983-07-11 1984-07-11 Kopiergerät

Country Status (3)

Country Link
US (1) US4573787A (US07943777-20110517-C00090.png)
JP (1) JPS6017438A (US07943777-20110517-C00090.png)
DE (1) DE3425572C2 (US07943777-20110517-C00090.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3921640A1 (de) * 1988-06-30 1990-01-04 Toshiba Kawasaki Kk Lichtmengenregelvorrichtung

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6123140A (ja) * 1984-07-12 1986-01-31 Fuji Xerox Co Ltd 露光ランプの制御装置
US4709250A (en) * 1985-02-19 1987-11-24 Canon Kabushiki Kaisha Image forming apparatus
JPS61189579A (ja) * 1985-02-19 1986-08-23 Sharp Corp 複写機の露光調整装置
US4740810A (en) * 1985-07-09 1988-04-26 Minolta Camera Kabushiki Kaisha Copying apparatus
US4819029A (en) * 1986-01-29 1989-04-04 Minolta Camera Kabushiki Kaisha Copying machine capable of producing a copy with a filing margin
JPS63137224A (ja) * 1986-11-28 1988-06-09 Minolta Camera Co Ltd 自動露光装置
JPH0622838Y2 (ja) * 1986-12-16 1994-06-15 富士ゼロックス株式会社 複写機の光量制御装置
JPS6477069A (en) * 1987-05-09 1989-03-23 Ricoh Kk Density control system for digital copying machine
JP2755604B2 (ja) * 1988-08-05 1998-05-20 株式会社東芝 露光制御装置
JP2673072B2 (ja) * 1991-12-17 1997-11-05 三田工業株式会社 画像形成装置
JPH0698094A (ja) * 1992-09-14 1994-04-08 Toshiba Corp 画像形成装置
US5596444A (en) * 1993-03-02 1997-01-21 Minolta Camera Kabushiki Kaisha Optical apparatus having laser beam diameter variable according to image data
JP3410190B2 (ja) * 1993-12-29 2003-05-26 株式会社東芝 画像形成装置及び原稿読取り方法
TWI843322B (zh) * 2022-12-08 2024-05-21 明泰科技股份有限公司 能以數位式進行直流風扇調速的電路系統

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2039336A1 (de) 1969-08-13 1971-02-25 Minolta Camera Kk Vorrichtung zur Einstellung der Belichtungsmenge in einem Kopiergeraet
DE2807317C3 (de) 1977-02-23 1982-02-11 Ricoh Co., Ltd., Tokyo Verfahren zur Einhaltung der Optimalbedingungen bei der Elektrofotografie
DE3147427A1 (de) 1980-12-02 1982-07-01 Gestetner Manufacturing Ltd., London Abtasteinrichtung fuer fotokopiergeraet
DE3102426C2 (de) 1980-01-31 1986-04-03 Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa Belichtungsregelvorrichtung für ein Photokopiergerät

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1436899A (en) * 1973-05-23 1976-05-26 Xerox Corp Document copying apparatus
JPS5436725A (en) * 1977-08-26 1979-03-17 Ricoh Co Ltd Zerographic copying method
JPS5619038A (en) * 1979-07-24 1981-02-23 Ricoh Co Ltd Control system of copy density in copying machine having variable power function
JPS57173859A (en) * 1981-04-20 1982-10-26 Canon Inc Exposure quantity controller of color picture forming device
US4474460A (en) * 1981-07-16 1984-10-02 Fuji Xerox Company Limited Microfilm copying machine
JPS5823023A (ja) * 1981-08-03 1983-02-10 Fuji Xerox Co Ltd 自動露光制御方法
JPS5824170A (ja) * 1981-08-05 1983-02-14 Fuji Xerox Co Ltd 複写機のランプ印加電圧設定方法
JPS5864798A (ja) * 1981-10-14 1983-04-18 富士ゼロックス株式会社 ランプ電圧制御装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2039336A1 (de) 1969-08-13 1971-02-25 Minolta Camera Kk Vorrichtung zur Einstellung der Belichtungsmenge in einem Kopiergeraet
DE2807317C3 (de) 1977-02-23 1982-02-11 Ricoh Co., Ltd., Tokyo Verfahren zur Einhaltung der Optimalbedingungen bei der Elektrofotografie
DE3102426C2 (de) 1980-01-31 1986-04-03 Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa Belichtungsregelvorrichtung für ein Photokopiergerät
DE3147427A1 (de) 1980-12-02 1982-07-01 Gestetner Manufacturing Ltd., London Abtasteinrichtung fuer fotokopiergeraet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3921640A1 (de) * 1988-06-30 1990-01-04 Toshiba Kawasaki Kk Lichtmengenregelvorrichtung

Also Published As

Publication number Publication date
US4573787A (en) 1986-03-04
DE3425572A1 (de) 1985-01-31
JPS6017438A (ja) 1985-01-29

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8128 New person/name/address of the agent

Representative=s name: HENKEL, G., DR.PHIL. FEILER, L., DR.RER.NAT. HAENZ

D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee