JPS5654456A - Fog preventing method - Google Patents

Fog preventing method

Info

Publication number
JPS5654456A
JPS5654456A JP13112979A JP13112979A JPS5654456A JP S5654456 A JPS5654456 A JP S5654456A JP 13112979 A JP13112979 A JP 13112979A JP 13112979 A JP13112979 A JP 13112979A JP S5654456 A JPS5654456 A JP S5654456A
Authority
JP
Japan
Prior art keywords
photoreceptor
use number
developer
accordance
polarity
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
JP13112979A
Other languages
Japanese (ja)
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 JP13112979A priority Critical patent/JPS5654456A/en
Priority to US06/191,030 priority patent/US4402591A/en
Priority to DE19803036731 priority patent/DE3036731A1/en
Priority to GB8031336A priority patent/GB2062548B/en
Publication of JPS5654456A publication Critical patent/JPS5654456A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE: To obtain an always fogfree image, by changing bias voltage to be applied to a control grating in accordance with a repeated use number of a photoreceptor or a developer, and converting polarity of toner charge attached to the photoreceptor into the opposite one.
CONSTITUTION: A rotation number of a drum or a sleeve roller is measured in accordance with use number total 21 of a photoreceptor or use number total 22 of a developer. An output value of bias voltage source 23 is gradually changed to change potential of control grating 24 of corona discharger 17 prior to transfer. As a result, when the use number of the photoreceptor or the developer rises, the bias voltage rises in accordance with its rise, an accelerating electric field of corona discharge reverse in polarity to a charged toner is always active, thus permitting a fogging toner to be converted in polarity, and an always fogfree copy image to be obtained without being transferred by it.
COPYRIGHT: (C)1981,JPO&Japio
JP13112979A 1979-09-29 1979-10-11 Fog preventing method Pending JPS5654456A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP13112979A JPS5654456A (en) 1979-10-11 1979-10-11 Fog preventing method
US06/191,030 US4402591A (en) 1979-09-29 1980-09-26 Electrophotographic apparatus
DE19803036731 DE3036731A1 (en) 1979-09-29 1980-09-29 ELECTROPHOTOGRAPHIC DEVICE
GB8031336A GB2062548B (en) 1979-09-29 1980-09-29 Electrophotographic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13112979A JPS5654456A (en) 1979-10-11 1979-10-11 Fog preventing method

Publications (1)

Publication Number Publication Date
JPS5654456A true JPS5654456A (en) 1981-05-14

Family

ID=15050654

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13112979A Pending JPS5654456A (en) 1979-09-29 1979-10-11 Fog preventing method

Country Status (1)

Country Link
JP (1) JPS5654456A (en)

Similar Documents

Publication Publication Date Title
JPS56110968A (en) Electrophotographic device
JPS57128365A (en) Powder image transfer type electronic copier
GB1469159A (en) Electrophotographic apparatus
JPS5425830A (en) Image forming method in electrophotographic copiers and others
JPS5662275A (en) Developing method
JPS5654456A (en) Fog preventing method
JPS54115233A (en) Reversal development process
JPS5481855A (en) Two color print type electrostatic recoder
JPS54155840A (en) Developing method in two color electrophotographic copier
JPS547332A (en) Electrophotographic method
JPS576873A (en) Developing method for electrostatic latent image
JPS5650344A (en) Electrophotogtaphic apparatus
JPS5574567A (en) Developing device of one-component toner
JPS5677850A (en) Method of controlling surface potential of photoreceptor of electrophotographic copier
JPS55117163A (en) Image forming device
JPS53109635A (en) Electrophotographic apparatus
JPS5555376A (en) Toner image cleaner
JPS54139555A (en) Developing bias device of electrophotographic copier
JPS54134631A (en) Electrophotographic copying process
JPS54143238A (en) Developing process
JPS55120048A (en) Recording density control method in electrophotographic type printer
JPS5650340A (en) Electrophotographic apparatus
JPS52133218A (en) Electrophotographic copying
JPS56138763A (en) Transfer roller used for electrophotographic apparatus
JPS5660452A (en) Electrophotographic device