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Title:
ELECTROPHOTOGRAPHIC DEVICE
Document Type and Number:
Japanese Patent JPH02115862
Kind Code:
A
Abstract:

PURPOSE: To detect that the life of an electrophotographic photosensitive body is shortened due to damage before picture defect appears by providing a detecting means detecting the surface coarseness of the electrophotographic sensitive body.

CONSTITUTION: After a visual picture is transferred onto a transfer sheet 10, a destaticizing means 7 removes residual charges on the electrophotographic sensitive body 1, and then a cleaning means 2 removes an after image on the sensitive body 1. At the end of stopping the rotation of the sensitive body 1, a surface coarseness detector 9 detects the surface coarseness of the sensitive body 1. Thus, the body 1 can be fully used regardless of the variance of the number of copied sheets in endurance limit which is caused by environmental difference and mechanical difference. Alarming is issued before a picture is damaged, whereby reliability on the picture quality can be enhanced.


Inventors:
AMAMIYA SHOJI
SAKO SHUNKAI
SAKAKIBARA TEIGO
SAKAI KIYOSHI
Application Number:
JP27009788A
Publication Date:
April 27, 1990
Filing Date:
October 25, 1988
Export Citation:
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Assignee:
CANON KK
International Classes:
G03G21/00; G03G15/00; (IPC1-7): G03G15/00; G03G21/00
Attorney, Agent or Firm:
Marushima Giichi



 
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