JPS5595964A - Electrophotography method - Google Patents

Electrophotography method

Info

Publication number
JPS5595964A
JPS5595964A JP192279A JP192279A JPS5595964A JP S5595964 A JPS5595964 A JP S5595964A JP 192279 A JP192279 A JP 192279A JP 192279 A JP192279 A JP 192279A JP S5595964 A JPS5595964 A JP S5595964A
Authority
JP
Japan
Prior art keywords
voltage
accordance
corona
measures
sum
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
JP192279A
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 JP192279A priority Critical patent/JPS5595964A/en
Publication of JPS5595964A publication Critical patent/JPS5595964A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE: To obtain copied images always free from fog, by automatically changing the first charge voltage to be set in accordance with the repeated times of destaticization and exposure, and controlling the bias voltage of a developing unit in accordance with the primary setting voltage after the change.
CONSTITUTION: Photoreceptor 13 grounded moves in the arrow direction, and positive voltage is applied to receptor 13 with corona diacharger 14 for charging from a high voltage source, but control terminal 17A corona discharges at a proper voltage in accordance with the density of a copied image, and corona discharger 21 for exposure applies reverse polarity high voltage. Measuring means 20, 27 measures the differences between currents flowing through current detectors 18, 19, and 25, 26, respectively. Measuring means 28 measures the sum of these current values, and feeds back this sum to converter 29 for applying bias voltage to developing unit 30 to change this voltage in accordance with the current value, thus permitting fog due to toner attachment to the photoreceptor light area, and carrier attachment to be eliminated.
COPYRIGHT: (C)1980,JPO&Japio
JP192279A 1979-01-11 1979-01-11 Electrophotography method Pending JPS5595964A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP192279A JPS5595964A (en) 1979-01-11 1979-01-11 Electrophotography method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP192279A JPS5595964A (en) 1979-01-11 1979-01-11 Electrophotography method

Publications (1)

Publication Number Publication Date
JPS5595964A true JPS5595964A (en) 1980-07-21

Family

ID=11515077

Family Applications (1)

Application Number Title Priority Date Filing Date
JP192279A Pending JPS5595964A (en) 1979-01-11 1979-01-11 Electrophotography method

Country Status (1)

Country Link
JP (1) JPS5595964A (en)

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