Development device of image forming apparatus

Details Development device of image forming apparatus Development device of image forming apparatus

1997-07-16

1999-09-14

Brase, Sandra

Electrophotography

Having particular structure

Modular or displaceable

G03G 1504

Patent

active

059535636

ABSTRACT:
Vents are formed on a developer flow regulating plate inside a casing so as to reduce a pressure in a first space which increases as a developer holder rotates. Further, vents for connecting a vacuum space formed in front of a developer layer thickness regulating section for regulating a thickness of a developer layer formed on the surface of the developer holder and the outside air are formed. The vents thus formed for connecting the vacuum space and the outside air take in the outside air along the front face of the developer layer regulating section so as to increase the negative pressure in the vacuum space. A shape of a lower edge portion of an opening section formed on the casing is varied in a longitudinal direction so as to optimize an effect of suppressing a scattering of a developer. Furthermore, a rotation start timing of an agitating section for agitating the developer to be supplied to the developer holder is delayed from a rotation start timing of the developer holder. The described features permit the scattering of the developer to be suppressed.

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patent: 4700659 (1987-10-01), Hirakura et al.
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patent: 4963930 (1990-10-01), Yoshimaru et al.
patent: 5034773 (1991-07-01), Nimura et al.
patent: 5212344 (1993-05-01), Kageyama et al.
patent: 5223898 (1993-06-01), Fujii et al.

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