JPS5719775A - Electrophotographic device - Google Patents

Electrophotographic device

Info

Publication number
JPS5719775A
JPS5719775A JP9449780A JP9449780A JPS5719775A JP S5719775 A JPS5719775 A JP S5719775A JP 9449780 A JP9449780 A JP 9449780A JP 9449780 A JP9449780 A JP 9449780A JP S5719775 A JPS5719775 A JP S5719775A
Authority
JP
Japan
Prior art keywords
surface potential
drum
lamp
charger
power source
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
JP9449780A
Other languages
Japanese (ja)
Inventor
Yoshio Morimura
Masafumi Nakamura
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP9449780A priority Critical patent/JPS5719775A/en
Publication of JPS5719775A publication Critical patent/JPS5719775A/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
    • G03G15/55—Self-diagnostics; Malfunction or lifetime display
    • G03G15/553—Monitoring or warning means for exhaustion or lifetime end of consumables, e.g. indication of insufficient copy sheet quantity for a job
    • 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
    • G03G15/55—Self-diagnostics; Malfunction or lifetime display

Abstract

PURPOSE:To detect the surface potential of a photoconductive photoreceptor directly, light an abnormality lamp by this signal and indicate the time for exchaging of the photoreceptor by applying an electric field perpendicularly to a piezoelectric body and detecting the strains generated in the right and left directions of the piezoelectric body by this. CONSTITUTION:The surface of a photoconductive photosensitive drum 18 is charged with a charger 29. A surface potential derector 11 is disposed near the charger 29, and the detected output thereof is applied to a comparing amplifier 30. When the surface potential of the drum 18 compared with a reference electric power source 31 lowers below a limit, the supply of electric current to the base of a transistor 32 increases and the current flows from the power source to ground side of a display lamp 33, then the lamp is lighted. When the surface potential is zero owing to abnormality in the system, the similar operation takes place. At the same time, the output signal is utilized as a stop signal for a driving system 34, which in turn stops a driving motor for the drum or the like thereby preventing the system from operating.
JP9449780A 1980-07-09 1980-07-09 Electrophotographic device Pending JPS5719775A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9449780A JPS5719775A (en) 1980-07-09 1980-07-09 Electrophotographic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9449780A JPS5719775A (en) 1980-07-09 1980-07-09 Electrophotographic device

Publications (1)

Publication Number Publication Date
JPS5719775A true JPS5719775A (en) 1982-02-02

Family

ID=14111934

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9449780A Pending JPS5719775A (en) 1980-07-09 1980-07-09 Electrophotographic device

Country Status (1)

Country Link
JP (1) JPS5719775A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5971077A (en) * 1982-10-18 1984-04-21 Fuji Electric Co Ltd Evaluation of light fatigue of photoreceptor for electronic photography
JPS61148460A (en) * 1984-12-21 1986-07-07 Fujitsu Ltd Driving control system of laser printer
JPH02149942U (en) * 1989-05-24 1990-12-21
EP0590691A3 (en) * 1988-03-22 1994-08-31 Hitachi Ltd
US5559578A (en) * 1988-03-22 1996-09-24 Hitachi, Ltd. Electrostatic recording apparatus with electrified cap and managing system thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5971077A (en) * 1982-10-18 1984-04-21 Fuji Electric Co Ltd Evaluation of light fatigue of photoreceptor for electronic photography
JPH0447813B2 (en) * 1982-10-18 1992-08-05 Fuji Electric Co Ltd
JPS61148460A (en) * 1984-12-21 1986-07-07 Fujitsu Ltd Driving control system of laser printer
EP0590691A3 (en) * 1988-03-22 1994-08-31 Hitachi Ltd
US5404201A (en) * 1988-03-22 1995-04-04 Hitachi, Ltd. Electrostatic recording apparatus, method of controlling the apparatus, and method of evaluating life of photoconductive member of electrostatic recording apparatus
US5559578A (en) * 1988-03-22 1996-09-24 Hitachi, Ltd. Electrostatic recording apparatus with electrified cap and managing system thereof
JPH02149942U (en) * 1989-05-24 1990-12-21

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