Method for controlling prefatiguing illumination of a photosensitive member
AssigneeKonishiroku Photo Industry Co., Ltd.
InventorsKazuo Yasuda, Akihiko Tamura, Yoshimitsu Nakamura
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Abstract
Actuation of a prefatiguing lamp is selectively controlled in accordance with the measured time interval between successive copying operations. In substantially continuous copying where the measured interval is less than a first predetermined time period, no prefatiguing illumination is provided. Where the measured interval exceeds a second, longer predetermined time period, full illumination is provided. When the measured interval is between the first and second predetermined periods, partial illumination is provided by appropriate reduction in the operating voltage impressed upon the prefatiguing lamp.
Claims4
In a copying machine which includes a photosensitive member for receiving a latent image in the course of a copying operation during which a reproduction is produced by the machine, and an auxiliary light source operable to illuminate the photosensitive member and thereby prefatigue the member prior to a copying operation during which a latent image is received thereon, the improvement comprising a method of controlling the operation of the auxiliary light source, comprising:
- measuring the time interval between the completion of each copying operation and initiation of the next succeeding copying operation;
- and
- controlling the operation of the auxiliary light source at the initiation of each copying operation in accordance with the latest measured time interval such that the amount of prefatiguing illumination on the photosensitive member is varied in substantially direct relation to the length of the measured time interval, whereby the photosensitive member is appropriately prefatigued in accordance with the measured time interval between successive copying operations.
Dependencies are inferred from the claim text.