JPS561971A - Photoreceptor fatigue degree detection in copying machine - Google Patents
Photoreceptor fatigue degree detection in copying machineInfo
- Publication number
- JPS561971A JPS561971A JP7774679A JP7774679A JPS561971A JP S561971 A JPS561971 A JP S561971A JP 7774679 A JP7774679 A JP 7774679A JP 7774679 A JP7774679 A JP 7774679A JP S561971 A JPS561971 A JP S561971A
- Authority
- JP
- Japan
- Prior art keywords
- light
- electrode layer
- layer
- sensor
- photoconductive
- 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
Landscapes
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE: To accurately know the fatigue degree of the photoreceptor by disposing the photosensor comprising sandwiching a thin layer of photoconductive material between an electrode layer and an electrode layer which is not light-transmittable near outside the copying area region.
CONSTITUTION: A photoconductive layer 11 being the thin layer formed by the same material as the photoconductive layer of a photoreceptor 1 or the material of the same system is sandwiched by an electrode layer 12 and a transparent or semi-transparent electrode layer 13 which is not light-shieldable to constitute a photosensor 10. This sensor 10 is disposed near the outer side of the side end part side of the effective copying area regions E, D shown by the alternate long and short dash lines, in the position where it receives light from a light source, with the electrode layer side being not light-shieldable as the photodetecting side. At the copying, constant voltage is applied between both electrodes of the sensor 10 and the electric signal from the sensor 10 is detected in a detecting part 11'. This signal contains the light fatigue information of the photoconductive layer 11 in the sensor 10, thus permitting the detection of the light fatigue of the photoconductive layer.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7774679A JPS561971A (en) | 1979-06-20 | 1979-06-20 | Photoreceptor fatigue degree detection in copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7774679A JPS561971A (en) | 1979-06-20 | 1979-06-20 | Photoreceptor fatigue degree detection in copying machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS561971A true JPS561971A (en) | 1981-01-10 |
Family
ID=13642469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7774679A Pending JPS561971A (en) | 1979-06-20 | 1979-06-20 | Photoreceptor fatigue degree detection in copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS561971A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61262760A (en) * | 1985-05-17 | 1986-11-20 | Canon Inc | Image forming device |
| JPS61262763A (en) * | 1985-05-17 | 1986-11-20 | Canon Inc | Image forming device |
| JPS61262762A (en) * | 1985-05-17 | 1986-11-20 | Canon Inc | Image forming device |
| JPS63281728A (en) * | 1987-05-13 | 1988-11-18 | Sanden Corp | Production of multi-step v-pulley |
-
1979
- 1979-06-20 JP JP7774679A patent/JPS561971A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61262760A (en) * | 1985-05-17 | 1986-11-20 | Canon Inc | Image forming device |
| JPS61262763A (en) * | 1985-05-17 | 1986-11-20 | Canon Inc | Image forming device |
| JPS61262762A (en) * | 1985-05-17 | 1986-11-20 | Canon Inc | Image forming device |
| JPS63281728A (en) * | 1987-05-13 | 1988-11-18 | Sanden Corp | Production of multi-step v-pulley |
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