JPS5723957A - Electrophotographic device - Google Patents

Electrophotographic device

Info

Publication number
JPS5723957A
JPS5723957A JP9901080A JP9901080A JPS5723957A JP S5723957 A JPS5723957 A JP S5723957A JP 9901080 A JP9901080 A JP 9901080A JP 9901080 A JP9901080 A JP 9901080A JP S5723957 A JPS5723957 A JP S5723957A
Authority
JP
Japan
Prior art keywords
exposed part
photoreceptor
toner
potential
exposing device
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.)
Pending
Application number
JP9901080A
Other languages
Japanese (ja)
Inventor
Yasuo Kikuchi
Ryoji Kojima
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.)
Koki Holdings Co Ltd
Original Assignee
Hitachi Koki 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 Hitachi Koki Co Ltd filed Critical Hitachi Koki Co Ltd
Priority to JP9901080A priority Critical patent/JPS5723957A/en
Publication of JPS5723957A publication Critical patent/JPS5723957A/en
Pending 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
    • G03G15/045—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 charging or discharging distinct portions of the charge pattern on the recording material, e.g. for contrast enhancement or discharging non-image areas

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Developing For Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

PURPOSE:To obtain pictures free from unevenness of density by electrifying an exposed part, having an electrostatic image formed by an exposing device between the exposing device and a developing device, with the opposite polarity to the potential of the electrification of a charger. CONSTITUTION:Between an exposing device 3 and a developing device 4, an opposite-polarity charger 6 is provided and, for example, when a photoreceptor 1 is of a (p) type, a photoreceptor 1 electrified uniformly and positively is exposed by the exposing device 3, electrified negatively by the opposite-polarity charger 6, and then developed. In this case, VO>VD>0>VR' where the potential of the photoreceptor 1 electrified positively in advance and that of an unexposed part A are denoted as VO, the potential of an exposed part B is VR, and the potentials of toner 5 and the exposed part B during development are VD and VR' respectively. Therefore, an electric field is established directly between the toner and exposed part B to stick the toner 5 to the entire exposed part.
JP9901080A 1980-07-18 1980-07-18 Electrophotographic device Pending JPS5723957A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9901080A JPS5723957A (en) 1980-07-18 1980-07-18 Electrophotographic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9901080A JPS5723957A (en) 1980-07-18 1980-07-18 Electrophotographic device

Publications (1)

Publication Number Publication Date
JPS5723957A true JPS5723957A (en) 1982-02-08

Family

ID=14235109

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9901080A Pending JPS5723957A (en) 1980-07-18 1980-07-18 Electrophotographic device

Country Status (1)

Country Link
JP (1) JPS5723957A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54154333A (en) * 1978-05-25 1979-12-05 Canon Inc Electrophotographic apparatus and method thereof
JPS54154334A (en) * 1978-05-25 1979-12-05 Canon Inc Electrophotographic apparatus and nethod thereof
JPS54157629A (en) * 1978-06-01 1979-12-12 Canon Inc Method and apparatus for electrophotography
JPS5517174A (en) * 1978-07-25 1980-02-06 Canon Inc Image stabilizing method
JPS5529881A (en) * 1978-08-25 1980-03-03 Ricoh Co Ltd Latent image potential correcting method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54154333A (en) * 1978-05-25 1979-12-05 Canon Inc Electrophotographic apparatus and method thereof
JPS54154334A (en) * 1978-05-25 1979-12-05 Canon Inc Electrophotographic apparatus and nethod thereof
JPS54157629A (en) * 1978-06-01 1979-12-12 Canon Inc Method and apparatus for electrophotography
JPS5517174A (en) * 1978-07-25 1980-02-06 Canon Inc Image stabilizing method
JPS5529881A (en) * 1978-08-25 1980-03-03 Ricoh Co Ltd Latent image potential correcting method

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