Photocopying – Contact printing – Light boxes
Patent
1993-10-18
1994-12-06
Braun, Fred L.
Photocopying
Contact printing
Light boxes
355221, 355296, G03G 1502, G03G 2100
Patent
active
053715780
ABSTRACT:
An image forming apparatus includes electrostatic latent image carrier having a moving surface to be charged and contact charging device for selectively applying a first charging voltage and a second charging voltage to the surface to be charged, the second charging voltage having the same polarity as the first charging voltage and having an absolute value smaller than that of the first charging voltage, the first charging voltage being applied to an electrostatic latent image forming region of the surface to be charged, the first charging voltage being changed to the second charging voltage when a region confronting the contact charging device moves from the electrostatic latent image forming region to a non-image portion in accordance with movement of the surface to be charged.
REFERENCES:
patent: 3850662 (1974-11-01), Jahn
patent: 4469435 (1984-09-01), Nosaki et al.
patent: 4481275 (1984-11-01), Iseki et al.
patent: 4939542 (1990-07-01), Kurando et al.
patent: 4959688 (1990-09-01), Koitabashi
patent: 5006902 (1991-04-01), Araya
patent: 5012282 (1991-04-01), Wanou et al.
patent: 5132738 (1992-07-01), Nakamura et al.
Asano Masaki
Iino Shuji
Ikegawa Akihito
Osawa Izumi
Braun Fred L.
Minolta Camera Kabushiki Kaisha
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