JPS57125952A - Display device for corotron requiring check - Google Patents

Display device for corotron requiring check

Info

Publication number
JPS57125952A
JPS57125952A JP56012617A JP1261781A JPS57125952A JP S57125952 A JPS57125952 A JP S57125952A JP 56012617 A JP56012617 A JP 56012617A JP 1261781 A JP1261781 A JP 1261781A JP S57125952 A JPS57125952 A JP S57125952A
Authority
JP
Japan
Prior art keywords
comparator
corotron
display device
source
check
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
JP56012617A
Other languages
Japanese (ja)
Inventor
Yoshiaki Takahashi
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox 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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP56012617A priority Critical patent/JPS57125952A/en
Publication of JPS57125952A publication Critical patent/JPS57125952A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0266—Arrangements for controlling the amount of charge
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0291—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To prevent the degradation in copying quality by providing a comparator which detects the dynamic electric current between a photoreceptor and a Corotron wire, and generates a check require signal from the detection signal thereof and a reference signal. CONSTITUTION:A high voltage source 3 is connected to a Corotron 2 applying electric charge to a photosensitive drum 7, and for example, a detection resistance R is connected between a photosensitive drum 1 and the source 3 in order to detect the dynamic electric current Di flowing from the Corotron wire 4 in the Corotron 2 to the drum 1. The terminal voltage thereof is connected to one input of a comparator 6 via a buffer and a converter 5. This buffer/converter 5 converts the terminal voltage of the resistance R to the analog voltage suited for inputting to the comparator 6, and protects the comparator 6 against the source 3. The other input of the comparator 6 is connected to a potentiometer 7 giving a reference value Rf, and the output thereof is connected to a display device 8. When the current Di lowers below the reference value Rf, the comparator 6 emits a display the Corotron requiring check to the display device 8.
JP56012617A 1981-01-30 1981-01-30 Display device for corotron requiring check Pending JPS57125952A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56012617A JPS57125952A (en) 1981-01-30 1981-01-30 Display device for corotron requiring check

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56012617A JPS57125952A (en) 1981-01-30 1981-01-30 Display device for corotron requiring check

Publications (1)

Publication Number Publication Date
JPS57125952A true JPS57125952A (en) 1982-08-05

Family

ID=11810333

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56012617A Pending JPS57125952A (en) 1981-01-30 1981-01-30 Display device for corotron requiring check

Country Status (1)

Country Link
JP (1) JPS57125952A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6259980A (en) * 1985-09-10 1987-03-16 Canon Inc Image forming device
JPS6259979A (en) * 1985-09-10 1987-03-16 Canon Inc Power unit
JPS6259978A (en) * 1985-09-10 1987-03-16 Canon Inc Image forming device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6259980A (en) * 1985-09-10 1987-03-16 Canon Inc Image forming device
JPS6259979A (en) * 1985-09-10 1987-03-16 Canon Inc Power unit
JPS6259978A (en) * 1985-09-10 1987-03-16 Canon Inc Image forming device

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