Photocopying – Contact printing – Light boxes
Patent
1991-11-26
1993-09-14
Picard, Leo P.
Photocopying
Contact printing
Light boxes
355208, G03G 2100
Patent
active
052453898
ABSTRACT:
An image forming apparatus wherein the copying operation is performed not only in an automatic density specifying mode but also in a manual density specifying mode according to select by an operator. When the ratio of the frequency of select of the manual density specifying mode to the frequency of select of the automatic density specifying mode has exceeded a predetermined value, the image forming apparatus is adapted to execute an image adjustment process by detecting the state of components, for example, charge wires for the purpose of adjusting the density of copy images formed in the automatic density specifying mode.
REFERENCES:
patent: 4542985 (1985-09-01), Honma et al.
patent: 4592646 (1986-06-01), Suzuki et al.
patent: 4885466 (1989-12-01), Koichi et al.
patent: 4970557 (1990-11-01), Masuda et al.
patent: 5053814 (1987-12-01), Takano et al.
patent: 5057867 (1991-10-01), Ishigaki et al.
Hatta Yoshihiko
Ideyama Hiroyuki
Ito Masazumi
Shimizu Tadafumi
Yoshiyama Tsugihito
Horgan Christopher
Minolta Camera Kabushiki Kaisha
Picard Leo P.
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