GB1399732A - Electrophotographic copying machine - Google Patents

Electrophotographic copying machine

Info

Publication number
GB1399732A
GB1399732A GB2373772A GB2373772A GB1399732A GB 1399732 A GB1399732 A GB 1399732A GB 2373772 A GB2373772 A GB 2373772A GB 2373772 A GB2373772 A GB 2373772A GB 1399732 A GB1399732 A GB 1399732A
Authority
GB
United Kingdom
Prior art keywords
electrodes
photo
mouth
copying machine
light image
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
GB2373772A
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 JP3434571A external-priority patent/JPS5617661B1/ja
Priority claimed from JP3576071A external-priority patent/JPS548105B1/ja
Application filed by Canon Inc filed Critical Canon Inc
Publication of GB1399732A publication Critical patent/GB1399732A/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
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0291—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Abstract

1399732 Electrostatic charging apparatus CANON KK 19 May 1972 [20 May 1971 24 May 1971] 23737/72 Heading G2H [Also in Division H1] A photo-conductive member is charged during exposure to a light image, by means of a transparent-backed corona discharge apparatus with an electrode grid between its mouth and the photoconductive member. Preferably the corona discharge apparatus comprises discharge wires 18 in an enclosure formed by side electrodes 20, 20<SP>1</SP> and a transparent rear electrode 21, through which a light image is projected on a photo-sensitive layer 24. Gride electrodes 22 stretch across the mouth of the enclosure formed by the electrodes 20, 20<SP>1</SP> and 21.
GB2373772A 1971-05-20 1972-05-19 Electrophotographic copying machine Expired GB1399732A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3434571A JPS5617661B1 (en) 1971-05-20 1971-05-20
JP3576071A JPS548105B1 (en) 1971-05-24 1971-05-24

Publications (1)

Publication Number Publication Date
GB1399732A true GB1399732A (en) 1975-07-02

Family

ID=26373141

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2373772A Expired GB1399732A (en) 1971-05-20 1972-05-19 Electrophotographic copying machine

Country Status (3)

Country Link
US (1) US3797927A (en)
DE (1) DE2224694C3 (en)
GB (1) GB1399732A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4998266A (en) * 1988-05-06 1991-03-05 U.S. Philips Corporation Device for producing x-ray images by means of a photoconductor

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4257701A (en) * 1974-09-11 1981-03-24 Canon Kabushiki Kaisha Image information recording apparatus
US4122462A (en) * 1974-09-11 1978-10-24 Canon Kabushiki Kaisha Image information recording apparatus
US4201465A (en) * 1975-11-26 1980-05-06 Ricoh Company, Ltd. Drum cleaning process and apparatus for electrophotography
JPS5265450A (en) * 1975-11-26 1977-05-30 Ricoh Co Ltd Method and apparatus for removing electricity for cleaning means of li ght sensitive body
US4135085A (en) * 1977-08-10 1979-01-16 The Continental Group, Inc. Charging device for basecoat charging of can ends
DE2915040A1 (en) * 1978-04-14 1979-10-25 Canon Kk METHOD OF MAKING AND INSTALLING A CORONA UNLOADER
US4265998A (en) * 1979-11-13 1981-05-05 International Business Machines Corporation Electrophotographic photoreceptive background areas cleaned by backcharge process
DE3048141C2 (en) * 1979-12-25 1982-12-23 Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa Device for uniformly charging a photoconductive recording material
US4494856A (en) * 1982-08-20 1985-01-22 Canon Kabushiki Kaisha Electrophotographic method and apparatus for providing accurate half-tone images
JP2586555B2 (en) * 1988-03-11 1997-03-05 ミノルタ株式会社 Electrophotographic charging device
US6134095A (en) * 1998-12-17 2000-10-17 May; John W. AC corona charger for an electrostatographic reproduction apparatus
WO2009002665A1 (en) * 2007-06-22 2008-12-31 3M Innovative Properties Company Apparatus and methods for modification of electrostatic charge on a moving web

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3220324A (en) * 1963-11-12 1965-11-30 Xerox Corp Photoconductively controlled corona charging
US3536483A (en) * 1964-10-20 1970-10-27 Katsuragawa Denki Kk Method of making electrographs wherein the resultant electrostatic image is not effected by further light exposure
US3438706A (en) * 1966-10-07 1969-04-15 Canon Kk Electrophotographic device
US3558307A (en) * 1966-10-07 1971-01-26 Dennison Mfg Co Electrostatic image reproduction with pre-exposure
US3603790A (en) * 1968-04-30 1971-09-07 Kodak Ltd Electroradiographic process
US3527941A (en) * 1968-07-22 1970-09-08 Eastman Kodak Co Charging system for placing a uniform charge on a photoconductive surface

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4998266A (en) * 1988-05-06 1991-03-05 U.S. Philips Corporation Device for producing x-ray images by means of a photoconductor

Also Published As

Publication number Publication date
US3797927A (en) 1974-03-19
DE2224694A1 (en) 1972-11-30
DE2224694C3 (en) 1978-05-03
DE2224694B2 (en) 1977-08-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years