Photocopying – Contact printing – Light boxes
Patent
1993-09-29
1995-04-04
Royer, William J.
Photocopying
Contact printing
Light boxes
355225, 355246, G03G 2100
Patent
active
054042038
ABSTRACT:
In an image-forming apparatus by using electrophotographic process, a method for stabilizing an image is provided. First, a photoconductor is sensitized with a prescribed standard sensitizing potential, and the surface potential thereof is detected. Then, the standard sensitizing potential is corrected according to the detected potential. Next, latent image patterns are formed with a plurality of light-emitting powers on a photoconductor which has been sensitized with the corrected prescribed standard potential, and the surface potentials thereof are detected. Thus, a relation between the light-emitting power and the surface potential is obtained directly. Then, the light-emitting power is determined which realizes the detected surface potential nearest to the object potential. Next, a standard toner image is formed for automatic image density control by using the corrected sensitizing potential and the selected light-emitting power.
REFERENCES:
patent: 3788739 (1974-01-01), Coriale
patent: 4355885 (1982-10-01), Nagashima et al.
patent: 4377338 (1983-03-01), Ernst
patent: 4583839 (1986-04-01), Suzuki
patent: 4816863 (1989-03-01), Lee
patent: 4894685 (1990-01-01), Shoji
patent: 5274424 (1993-12-01), Hattori et al.
Kinoshita Takeru
Yamada Takanobu
Minolta Camera Kabushiki Kaisha
Royer William J.
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