Image forming apparatus
AssigneeKonica Corporation
InventorsHaruo Iwahashi, Kazuhiro Nakazawa
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Abstract
Present invention provides an image forming apparatus wherein a photosensitive member is subjected to optimum fatigue treatment in order to prevent the fluctuation of copying density and prevent fogging. Therefore, an image forming apparatus according to the invention is arranged so that the duration of prerotation for subjecting a photosensitive member to the fatigue treatment in advance is regulated in accordance with both the rest time after the completion of a previously-executed copying operation and the current temperature of the photosensitive member.
Claims9
Image forming apparatus comprising
- a photosensitive member being rotatable for forming latent image thereon,
- said photosensitive member having an electric capability of establishing electric potential thereon by being subjected to electrification and having a fatigue characteristic in which the electric capability changes with respect to operation period and the changed electric capability recovers with respect to rest time period,
- a means for judging the rest time period,
- a means for detecting temperature of said photosensitve member,
- a means for providing fatigue to said photosensitive member in order to change the electric capability,
- a means for controlling said fatigue providing means based on the rest period and the temperature.
lmage forming apparatus comprising
- a photosensitive member being rotatable for forming toner image thereon,
- a fixing means having a heat fixing roller for fixing toner image onto recording medium,
- said photosensitive member having an electric capability of establishing electric potential thereon by being subjected to electrification and having a fatigue characteristic in which the electric capability changes with respect to operation period and the changed electric capability recovers with respect to rest time period,
- a means for providing fatigue to said photosensitive member in order to change the electric capability,
- a means for judging the rest time period based on the temperature of said heat fixing means,
- a means for controlling said fatigue providing means based on the rest time period.
Dependencies are inferred from the claim text.