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JPS57116379A - Electrophotographic device - Google Patents

Electrophotographic device

Info

Publication number
JPS57116379A
JPS57116379A JP291381A JP291381A JPS57116379A JP S57116379 A JPS57116379 A JP S57116379A JP 291381 A JP291381 A JP 291381A JP 291381 A JP291381 A JP 291381A JP S57116379 A JPS57116379 A JP S57116379A
Authority
JP
Japan
Prior art keywords
area
discharging
transfer paper
size
smaller
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
JP291381A
Other languages
Japanese (ja)
Inventor
Teruyuki Onuma
Nobuo Mochizuki
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
Priority to JP291381A priority Critical patent/JPS57116379A/en
Publication of JPS57116379A publication Critical patent/JPS57116379A/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
    • G03G15/047—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 for discharging non-image areas

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)

Abstract

PURPOSE:To maintain excellent image quality for a long period by providing a control means which precisely controls the quantities of light for discharging corresponding a transferred area and an untransferred area on a photoreceptor. CONSTITUTION:When an original smaller than the size that a photosensitive drum can takes a copy is copied, a transferred area 18 and an untransferred area 19 are formed; a great amount of toner sticks to the untransferred area 19 when an original press plate is not used like a copy of a book, and only a small amount of toner is left in the transferred area 18. For this prupose, shutters 20 and 21 divided corresponding to the size of transfer paper are arranged on the front surface of a discharging lamp 9; when large-sized transfer paper is used, the shutters 20 and 21 are half-opened to perform discharging with a small quantity of light and when transfer paper with smaller size is used, the smaller shutter 21 is opened fullt while the other shutter 20 is half-opened during the discharging. Thus, the optical fatigue of the photosensitive drum is reduced.
JP291381A 1981-01-12 1981-01-12 Electrophotographic device Pending JPS57116379A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP291381A JPS57116379A (en) 1981-01-12 1981-01-12 Electrophotographic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP291381A JPS57116379A (en) 1981-01-12 1981-01-12 Electrophotographic device

Publications (1)

Publication Number Publication Date
JPS57116379A true JPS57116379A (en) 1982-07-20

Family

ID=11542584

Family Applications (1)

Application Number Title Priority Date Filing Date
JP291381A Pending JPS57116379A (en) 1981-01-12 1981-01-12 Electrophotographic device

Country Status (1)

Country Link
JP (1) JPS57116379A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6117172A (en) * 1984-07-02 1986-01-25 Konishiroku Photo Ind Co Ltd Electrostatic recorder
JPS6258473U (en) * 1985-09-30 1987-04-11
JPH01503811A (en) * 1986-09-24 1989-12-21 オーセ　プリンテイング　システムズ　ゲゼルシャフト　ミット　ベシュレンクテル　ハフツング Development station used in electrophotographic equipment
JP2008310311A (en) * 2007-05-17 2008-12-25 Ricoh Co Ltd Image forming apparatus, image forming method, and process cartridge
JP2017003953A (en) * 2014-12-24 2017-01-05 株式会社リコー Image forming apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6117172A (en) * 1984-07-02 1986-01-25 Konishiroku Photo Ind Co Ltd Electrostatic recorder
JPS6258473U (en) * 1985-09-30 1987-04-11
JPH0531668Y2 (en) * 1985-09-30 1993-08-13
JPH01503811A (en) * 1986-09-24 1989-12-21 オーセ　プリンテイング　システムズ　ゲゼルシャフト　ミット　ベシュレンクテル　ハフツング Development station used in electrophotographic equipment
JP2008310311A (en) * 2007-05-17 2008-12-25 Ricoh Co Ltd Image forming apparatus, image forming method, and process cartridge
JP2017003953A (en) * 2014-12-24 2017-01-05 株式会社リコー Image forming apparatus

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