JPS5589856A - Electrophotographic method - Google Patents

Electrophotographic method

Info

Publication number
JPS5589856A
JPS5589856A JP16482078A JP16482078A JPS5589856A JP S5589856 A JPS5589856 A JP S5589856A JP 16482078 A JP16482078 A JP 16482078A JP 16482078 A JP16482078 A JP 16482078A JP S5589856 A JPS5589856 A JP S5589856A
Authority
JP
Japan
Prior art keywords
value
photoreceptor
current
polarity
primary
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.)
Granted
Application number
JP16482078A
Other languages
Japanese (ja)
Other versions
JPS6032186B2 (en
Inventor
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 JP53164820A priority Critical patent/JPS6032186B2/en
Publication of JPS5589856A publication Critical patent/JPS5589856A/en
Publication of JPS6032186B2 publication Critical patent/JPS6032186B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To obtain the distinct images of high contrast free from any photographic fog by changing the set potential of primary charging according to repetition times of destaticizing and exposure and controlling opposite polarity destaticizing according to the strength of primary set potential after the change thereby performing image formation.
CONSTITUTION: A photoreceptor 1 is grounded and moves in the arrow direction. It is applied with high voltage of positive polarity by a primary charging corona discharger 14. The current difference is measured 20 by the current detectors 18, 10 in the secondary side circuit of a high- voltage power source and the value thereof becomes the corona current value ID+ in the photoreceptor direction. At the same time, the negative polarity opposite from that of primary one is applied by a corona discharger 21 for exposure and the difference of the currents of current detectors 25, 26 is measured 27, whereby the value ID- is given. The current value (ID++ ID-) being the sum of the values obtained by both measurements 20, 27 is fed back to the input control circuit 29 of an opposite-polarity high-voltage power source 24 by a measuring means 25, whereby the value of the discharge current ID- being flowed to the photoreceptor is changed. Thereby, the value of (ID++ID-) may be made constant and the maintenance of the surface potential of the bright part of the photoreceptor at a constant value free from photographic fog is made possible.
COPYRIGHT: (C)1980,JPO&Japio
JP53164820A 1978-12-28 1978-12-28 electrophotography Expired JPS6032186B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53164820A JPS6032186B2 (en) 1978-12-28 1978-12-28 electrophotography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53164820A JPS6032186B2 (en) 1978-12-28 1978-12-28 electrophotography

Publications (2)

Publication Number Publication Date
JPS5589856A true JPS5589856A (en) 1980-07-07
JPS6032186B2 JPS6032186B2 (en) 1985-07-26

Family

ID=15800529

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53164820A Expired JPS6032186B2 (en) 1978-12-28 1978-12-28 electrophotography

Country Status (1)

Country Link
JP (1) JPS6032186B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6344670A (en) * 1986-08-11 1988-02-25 Canon Inc Multiimage forming device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6344670A (en) * 1986-08-11 1988-02-25 Canon Inc Multiimage forming device
JPH0556507B2 (en) * 1986-08-11 1993-08-19 Canon Kk

Also Published As

Publication number Publication date
JPS6032186B2 (en) 1985-07-26

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