JPS5719775A - Electrophotographic device - Google Patents
Electrophotographic deviceInfo
- 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
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
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.
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)
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 |
-
1980
- 1980-07-09 JP JP9449780A patent/JPS5719775A/en active Pending
Cited By (7)
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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