Image forming apparatus
AssigneeSanyo Electric Co., Ltd.
InventorsYasuhiro Kishimoto, Naoyuki Hashimoto, Hitoshi Hattori
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Abstract
An image forming apparatus includes a microcomputer. The number of image forming operation of a photosensitive drum is counted by a counter as a copy quantity, and data of the copy quantity is applied to the microcomputer. By referring to a copy quantity-voltage table, voltage setting data according to the copy quantity is applied by the microcomputer to a bias voltage source so that the bias voltage source applies a required bias voltage according to the voltage setting data to a conductive substrate of the photosensitive drum.
Claims11
An image forming apparatus, comprising:
- a photosensitive member including a conductive substrate;
- means for repetitively exposing said photosensitive member to light and an original for repetitive image forming operations;
- means for detecting the number of image forming operations of said photosensitive member;
- and
- means for changing an electric potential of said conductive substrate in response to an output of said detecting means corresponding to the detected number of image forming operations of said photosensitive member.
An image forming apparatus comprising:
- a photosensitive member including a conductive substrate;
- means for repetitively exposing said photosensitive member for repetitive image forming operations;
- means for detecting the number of image forming operations of said photosensitive member;
- means for correcting the number of image forming operations attributed to said photosensitive member on the basis of an exposure time which is different from a standard exposure time;
- and
- means for changing an electric potential of said conductive substrate in response to an output of said detecting means corresponding to the detected number of image forming operations of said photosensitive member.
Dependencies are inferred from the claim text.