Photocopying – Contact printing – Light boxes
Patent
1991-10-10
1993-02-09
Grimley, A. T.
Photocopying
Contact printing
Light boxes
118651, 118661, 355259, G03G 1500
Patent
active
051856328
ABSTRACT:
A device for developing a latent image on a photosensitive drum in an image forming apparatus, includes a developing roller for supplying a developing agent to the image carrier and a blade for forming a layer of the developing agent on the developing roller. The blade has a curved portion pressing the surface of the developing roller for controlling the thickness of the developing agent layer and for applying a frictional charge to the developing agent on the developing roller. The curved portion includes a first curved surface having a first radius R1 which contacts the surface of the developing roller and a second curved surface having a second radius R2. The relationship between the first and second radius is R1>R2.
REFERENCES:
patent: 4521098 (1985-06-01), Hosoya et al.
patent: 4908291 (1990-03-01), Fuma et al.
patent: 4920916 (1990-05-01), Mizuno et al.
patent: 4990959 (1991-02-01), Yamamuro et al.
patent: 5057868 (1991-10-01), Sekino et al.
Hosoya et al.; Contact-Type Development System Using Monocomponent Nonmagnetic Toner; Toshiba R&D Center, Toshiba Corp., R&D Lab., Tokyo Electric Co., Ltd.; Jul. 5, 1989; pp. 25/28.
Hirano Kouji
Yoshida Minoru
Beatty Robert
Grimley A. T.
Kabushiki Kaisha Toshiba
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