JPS5473055A - Charge quantity controller in electrophotographic copier - Google Patents

Charge quantity controller in electrophotographic copier

Info

Publication number
JPS5473055A
JPS5473055A JP14021077A JP14021077A JPS5473055A JP S5473055 A JPS5473055 A JP S5473055A JP 14021077 A JP14021077 A JP 14021077A JP 14021077 A JP14021077 A JP 14021077A JP S5473055 A JPS5473055 A JP S5473055A
Authority
JP
Japan
Prior art keywords
temperature
photosensitive drum
charge quantity
power source
high voltage
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
JP14021077A
Other languages
Japanese (ja)
Inventor
Fumitoshi Atsumi
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.)
Minolta Co Ltd
Original Assignee
Minolta 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP14021077A priority Critical patent/JPS5473055A/en
Publication of JPS5473055A publication Critical patent/JPS5473055A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To surely prevent the degradation in image density with an increase in temperature by controlling the charge quantity according to the temperature change of a temperature-dependent photoreceptor.
CONSTITUTION: A temperature detecting element 3 is disposed on the surface of a phtosensitive drum 1 and is connected to a high voltage power source control circuit 5 via signal exchanger 4. Then, the high voltage power source control circuit 5 controls a high voltage power source 6 according to the detection output of a temperature detecting element 3, by which the applied voltage of the charger 2 charging the surface of the photosensitive drum 1 is controlled and the surface potential of the photosensitive drum 1 is maintained constant, thus the decrease in image density along with a change in the temperature of the photosensitive drum 1 is surely prevented. It is also effective by inserting a grid between the charger 2 and photosensitive drum 1 and changing the charge quantity by the change in grid voltage.
COPYRIGHT: (C)1979,JPO&Japio
JP14021077A 1977-11-21 1977-11-21 Charge quantity controller in electrophotographic copier Pending JPS5473055A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14021077A JPS5473055A (en) 1977-11-21 1977-11-21 Charge quantity controller in electrophotographic copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14021077A JPS5473055A (en) 1977-11-21 1977-11-21 Charge quantity controller in electrophotographic copier

Publications (1)

Publication Number Publication Date
JPS5473055A true JPS5473055A (en) 1979-06-12

Family

ID=15263468

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14021077A Pending JPS5473055A (en) 1977-11-21 1977-11-21 Charge quantity controller in electrophotographic copier

Country Status (1)

Country Link
JP (1) JPS5473055A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5669660A (en) * 1979-11-09 1981-06-11 Nagano Aichi Denki Kk Power supply device for copying machine
JPS5766445A (en) * 1980-10-11 1982-04-22 Ricoh Co Ltd Controlling method for extent of charging of electrophotographic copying machine
US4583835A (en) * 1982-12-10 1986-04-22 Ricoh Company, Ltd. Image control device for electrophotographic copier
US4636060A (en) * 1984-02-28 1987-01-13 Agfa-Gevaert N.V. Electrostatic copying method including compensation for photoconductor fatigue and dark recovery
JPS6296258U (en) * 1985-12-06 1987-06-19
US5128718A (en) * 1989-08-31 1992-07-07 Canon Kabushiki Kaisha Image forming apparatus responsive to ambient condition detecting means
US7403728B2 (en) * 2005-07-13 2008-07-22 Xerox Corporation Calibration apparatus and method for charging unit of image forming device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5669660A (en) * 1979-11-09 1981-06-11 Nagano Aichi Denki Kk Power supply device for copying machine
JPS5766445A (en) * 1980-10-11 1982-04-22 Ricoh Co Ltd Controlling method for extent of charging of electrophotographic copying machine
US4583835A (en) * 1982-12-10 1986-04-22 Ricoh Company, Ltd. Image control device for electrophotographic copier
US4636060A (en) * 1984-02-28 1987-01-13 Agfa-Gevaert N.V. Electrostatic copying method including compensation for photoconductor fatigue and dark recovery
JPS6296258U (en) * 1985-12-06 1987-06-19
US5128718A (en) * 1989-08-31 1992-07-07 Canon Kabushiki Kaisha Image forming apparatus responsive to ambient condition detecting means
US7403728B2 (en) * 2005-07-13 2008-07-22 Xerox Corporation Calibration apparatus and method for charging unit of image forming device

Similar Documents

Publication Publication Date Title
JPS55157756A (en) Surface potential control unit
JPS5823043A (en) Automatic density controlling method of copying machine
JPS5518667A (en) Stabilization method of image density
JPS5473055A (en) Charge quantity controller in electrophotographic copier
JPS5784463A (en) Image former
JPS57130063A (en) Electrostatic recorder
JPS5662275A (en) Developing method
JPS5484738A (en) Developing device for variable magnification copier
JPS5688142A (en) Image density control device
JPS55106478A (en) Electrostatic latent image developing unit
JPS5643648A (en) Electrophotographic apparatus
JPS5529857A (en) Electrostatic recorder
JPS575058A (en) Charging controller
JPS5639556A (en) Electrophotographic copier
JPS5766445A (en) Controlling method for extent of charging of electrophotographic copying machine
JPS5560968A (en) Electrophotographic copier
JPS5677850A (en) Method of controlling surface potential of photoreceptor of electrophotographic copier
JPS54126550A (en) Static latent image developing apparatus
JPS6473366A (en) Image forming device
JPS5488131A (en) Auto bias developing device
JPS578553A (en) Recording device
JPS57129453A (en) Multi-mode copying machine
JPS5742056A (en) Electrostatic printing control method
JPS55121453A (en) Electrophotographic copier
JPS5647064A (en) Discharge quantity controlling method of discharger for electrophotography or electrostatic recording