Photocopying – Contact printing – Light boxes
Patent
1988-07-20
1990-06-19
Moses, R. L.
Photocopying
Contact printing
Light boxes
355219, 355 77, 430 31, G03G 2100
Patent
active
049357778
ABSTRACT:
Before a photoreceptor for an electrophotographic image forming apparatus is uniformly charged at the beginning of a process for forming a latent electrostatic image thereon, the photoreceptor is exposed to charge-removing light for stabilizing the surface potential such that a high-quality image can be obtained. The level of exposure is modified in view of the fatigue and recovery characteristics of the photoreceptor. During a continuous operation of the photoreceptor, the level is logarithmically reduced. When the photoreceptor is started again after a rest period, the initial level of exposure is adjusted by logarithmically increasing it according to the length of the rest period as well as in view of the level of exposure prior to the rest period.
REFERENCES:
patent: 4256401 (1981-03-01), Fujimura et al.
patent: 4375328 (1983-03-01), Tsuchiya et al.
patent: 4474455 (1984-10-01), Hirakura et al.
patent: 4538900 (1985-09-01), Lutus et al.
Kawabata Itaru
Kinashi Hiroshi
Masuda Jitsuo
Nakata Tooru
Noguchi Teruhiko
Moses R. L.
Sharp Kabushiki Kaisha
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