Photocopying – Contact printing – Light boxes
Patent
1993-07-08
1995-01-10
Beatty, Robert B.
Photocopying
Contact printing
Light boxes
355212, G03G 2100
Patent
active
053812123
ABSTRACT:
A photoreceptor having a marking area whose optical reflection property differs from that of a non-marking area is formed in a portion of a surface of an electrically conductive substrate. The average line of a vertical section of the non-marking area cut across the border line with the marking area is M.sub.0 and the average line of a vertical section of the marking area cut across the border line is N.sub.0 and that straight lines touching the average lines M.sub.0 and N.sub.0 at the intersection of M.sub.0 and N.sub.0 are tangent lines M.sub.1 and N.sub.1, respectively, the acute angle .theta. between M.sub.1 and N.sub.1 is within the range of 0.degree..ltoreq..theta..ltoreq.30.degree.. Setting the angle .theta. within this range enables a photoconductive layer of a uniform characteristic to be laminated on the electrically conductive substrate even when the marking area is formed on the surface of the substrate. With this arrangement, since information for optimizing the image quality of copies is obtained from the same location of a photoreceptor drum with reference to the marking area, a photoreceptor for electrophotography always produces copies of stable image quality.
REFERENCES:
patent: 4795906 (1989-01-01), Adams et al.
patent: 5198852 (1993-03-01), Mikami
patent: 5296895 (1994-03-01), Naito
Adachi Kazuya
Inoue Katsushi
Kinashi Hiroshi
Masuda Jitsuo
Noguchi Teruhiko
Beatty Robert B.
Conlin David G.
Corless Peter F.
Fuji Electric & Co., Ltd.
Sharp Kabushiki Kaisha
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