Electrophotography – Image formation – Development
Patent
1996-02-16
1998-06-02
Grimley, Arthur T.
Electrophotography
Image formation
Development
399284, G03G 1508
Patent
active
057615900
ABSTRACT:
A developing apparatus includes a developing roller which rotates along with the photosensitive drum on which an electrostatic latent image is formed, and feeding toner to be adhered to the electrostatic latent image formed on the photosensitive drum, a conductive blade for uniformly limiting the thickness of the toner put on the developing roller, and a first high-voltage generator for generating a development bias voltage of -200 V which is supplied to the developing roller and biases the potential of the toner. Particularly, the developing apparatus further includes a second high-voltage generator for generating a blade voltage of -300 V which is supplied to the conductive blade and electrostatically charging the toner to compensate for a shortage of the electrostatic charge obtained in the toner by friction on the developing roller.
REFERENCES:
patent: 5017967 (1991-05-01), Koga
patent: 5057871 (1991-10-01), Hirose et al.
patent: 5183964 (1993-02-01), Stelter et al.
patent: 5314774 (1994-05-01), Camis
patent: 5365318 (1994-11-01), Hiraoka et al.
patent: 5519472 (1996-05-01), Ojima et al.
Chen Sophia S.
Grimley Arthur T.
Kabushiki Kaisha TEC
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