JPS6459264A - Image forming device - Google Patents

Image forming device

Info

Publication number
JPS6459264A
JPS6459264A JP21666587A JP21666587A JPS6459264A JP S6459264 A JPS6459264 A JP S6459264A JP 21666587 A JP21666587 A JP 21666587A JP 21666587 A JP21666587 A JP 21666587A JP S6459264 A JPS6459264 A JP S6459264A
Authority
JP
Japan
Prior art keywords
electrostatic
outputs
current
reference signal
corona
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
JP21666587A
Other languages
Japanese (ja)
Inventor
Hitoshi Kimura
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP21666587A priority Critical patent/JPS6459264A/en
Publication of JPS6459264A publication Critical patent/JPS6459264A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Abstract

PURPOSE:To set an output from an electrostatic charging means in a specific level by comparing a detected current with a reference signal in a comparison means and varying a power supplied to the electrostatic charging means from a power source means according to the compared result. CONSTITUTION:According to the actions of the electrostatic chargers 12-14, the current which flows from a photosensitive drum 11 is converted into a voltage value by a current voltage conversion circuit 24. And the voltage value and the previously set reference signal are compared in the comparison circuits 26-28 so as to obtain a set level, according to which the outputs from the high voltage transformers 18-20 are varied. Namely, the outputs from the high voltage transformers 18-20 are set according to the corona outputs of the electrostatic chargers 12-14. Thus, the corona output from the electrostatic charger can be set in the specific value even if the electrostatic charger is stained.
JP21666587A 1987-08-31 1987-08-31 Image forming device Pending JPS6459264A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21666587A JPS6459264A (en) 1987-08-31 1987-08-31 Image forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21666587A JPS6459264A (en) 1987-08-31 1987-08-31 Image forming device

Publications (1)

Publication Number Publication Date
JPS6459264A true JPS6459264A (en) 1989-03-06

Family

ID=16692008

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21666587A Pending JPS6459264A (en) 1987-08-31 1987-08-31 Image forming device

Country Status (1)

Country Link
JP (1) JPS6459264A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4002013A1 (en) * 1989-03-23 1990-09-27 Toshiba Kawasaki Kk System for adjusting output of charging units for image prodn. - includes unit for charging light responsive or photo-conductor drum and discharge lamp which clears charge produced on drum
JPH034248A (en) * 1989-05-31 1991-01-10 Mita Ind Co Ltd Method and device for surface potential control
JPH05142957A (en) * 1991-11-26 1993-06-11 Sharp Corp Image forming device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4002013A1 (en) * 1989-03-23 1990-09-27 Toshiba Kawasaki Kk System for adjusting output of charging units for image prodn. - includes unit for charging light responsive or photo-conductor drum and discharge lamp which clears charge produced on drum
JPH034248A (en) * 1989-05-31 1991-01-10 Mita Ind Co Ltd Method and device for surface potential control
JPH05142957A (en) * 1991-11-26 1993-06-11 Sharp Corp Image forming device

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