JPS5570856A - Electrophotographic method - Google Patents

Electrophotographic method

Info

Publication number
JPS5570856A
JPS5570856A JP14511278A JP14511278A JPS5570856A JP S5570856 A JPS5570856 A JP S5570856A JP 14511278 A JP14511278 A JP 14511278A JP 14511278 A JP14511278 A JP 14511278A JP S5570856 A JPS5570856 A JP S5570856A
Authority
JP
Japan
Prior art keywords
conductive layer
photosensitive drum
primary
charger
uniformly
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
JP14511278A
Other languages
Japanese (ja)
Inventor
Hatsuo Tajima
Kimio Nakahata
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
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP14511278A priority Critical patent/JPS5570856A/en
Publication of JPS5570856A publication Critical patent/JPS5570856A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)

Abstract

PURPOSE:To reproduce a copy image free from ghost image, by applying an electric field of the reverse polarity of the primary charging before or after the primary charging, and forming a space charge uniformly in the photoelectric conductive layer, and removing the image memory. CONSTITUTION:Before charging a photosensitive drum 1 uniformly primarily by means of a primary charger 2, an electric field of the reverse polarity of the primary charge is applied on the photosensitive drum 1, which is made of surface insulating layer, photoelectric conductive layer, and conductive layer, in three layers in all, by means of a corona discharger 18 of negative polarity, etc., then the potential on the photoelectric conductive layer is converged in a constant saturated potential by the avalanche phenomenon by the charge charged on the drum 1. As a result, a space charge is uniformly and evenly formed in the photoelectric conductive layer, and the residual image memory of the previous photoconductive layer is erased, and the residual history on the photosensitive drum 1 is erased. Therefore, an intermediate copy image free from ghost due to remaining history on the photosensitive drum may be reproduced. Or, the same effect may be obtained when the discharger 18 is located behind the charger 2, between the charger 2 and the secondary corona discharger 3 for forming latent image by exposure.
JP14511278A 1978-11-24 1978-11-24 Electrophotographic method Pending JPS5570856A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14511278A JPS5570856A (en) 1978-11-24 1978-11-24 Electrophotographic method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14511278A JPS5570856A (en) 1978-11-24 1978-11-24 Electrophotographic method

Publications (1)

Publication Number Publication Date
JPS5570856A true JPS5570856A (en) 1980-05-28

Family

ID=15377655

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14511278A Pending JPS5570856A (en) 1978-11-24 1978-11-24 Electrophotographic method

Country Status (1)

Country Link
JP (1) JPS5570856A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0718665U (en) * 1993-09-20 1995-04-04 一憲 秋枝 Picture frame for colored paper

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0718665U (en) * 1993-09-20 1995-04-04 一憲 秋枝 Picture frame for colored paper

Similar Documents

Publication Publication Date Title
JPS56144454A (en) Electrophotographic method
JPS5687060A (en) Two-color electrophotographic recorder
JPS55137538A (en) Electrophotographic recording method
JPS5650354A (en) Electrophotography method
JPS57104159A (en) Toner density detecting method
JPS5742057A (en) Single color electrophotographic copying method
JPS5515151A (en) Electrophotographic method
JPS5774767A (en) Electrophotographic device
JPS56156849A (en) Method and device for regular copying and reversal copying
JPS547337A (en) Two-color copying method
JPS56161564A (en) Normal and reversal copying method
JPS5473041A (en) Electrophotographic method
JPS55138766A (en) Magnetic brush developing method
JPS5587170A (en) Method and apparatus for electrophotography
JPS5913736B2 (en) electrophotography
JPS54157629A (en) Method and apparatus for electrophotography
JPS5587168A (en) Method and apparatus for electrophotography
JPS5646277A (en) Powder transferring type electrophotographic method
JPS5587171A (en) Method and apparatus for electrophotography
JPS54126033A (en) Xerographic image formation
JPS56147158A (en) Electrophotographic recording method
JPS5652761A (en) Electrophotographic method
JPS55101962A (en) Method and apparatus for electrophotography
JPS5587175A (en) Method and apparatus for electrophotography
JPS5730849A (en) Visible image transfer type electrophotographic copying method