Photocopying – Including fiber optics
Patent
1978-09-13
1980-08-05
Moses, R. L.
Photocopying
Including fiber optics
350159, 355 71, 355 77, 430 31, G03G 1500
Patent
active
042159296
ABSTRACT:
A method and an apparatus for carrying out a kind of trimming operation in electrophotography, wherein a control light of an image region is irradiated onto a photosensitive body through masking members to thereby eliminate electric charge on the photosensitive body and to control the forming region of an electrostatic latent image. The masking members, in their single form, permit the light to pass therethrough, and intercept the same in their overlapped form, polarizing plates being used for the masking members. The latent image formation in the breadthwise direction of the image original is controlled by an overlapping degree of the masking members. The electrostatic latent image formation in the direction perpendicular to the breadthwise direction of the image is controlled by moving the masking members in their overlapped state in synchronism with movement of the photosensitive body, across the light path of the control light in the image region. By these operations, only a desired image region can be reproduced from the image original.
REFERENCES:
patent: 3621231 (1971-11-01), Craig
patent: 3671104 (1972-06-01), Seino
patent: 3967896 (1976-07-01), Looney et al.
patent: 4133609 (1979-01-01), Arai
Kubota Atsushi
Sato Tadashi
Canon Kabushiki Kaisha
Moses R. L.
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