Image forming apparatus with developer supply roller

Electrophotography – Image formation – Development

Reexamination Certificate

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Details

C399S283000

Reexamination Certificate

active

07639973

ABSTRACT:
An image forming apparatus has an electrostatic latent image bearing member capable of bearing an electrostatic latent image thereon, and a developer apparatus having a developer material for visualizing the electrostatic latent image into a visualized image. The developer apparatus includes a developer material bearing member, a housing adapted to accommodate a developer material, and a supply roller adapted to supply the developer material within the housing for the developer material bearing member. The supply roller has an outer circumferential foam layer. The foam layer is made of resin foam or rubber foam and has an air permeability of 5 ml/cm2/s or less, a density of 50-200 kg/m3, and a hysteresis loss ratio of 35-45%.

REFERENCES:
patent: 5655197 (1997-08-01), Okada et al.
patent: 6345166 (2002-02-01), Sakaizawa et al.
patent: 6810227 (2004-10-01), Sakata et al.
patent: 6829464 (2004-12-01), Haraguchi et al.
patent: 2001/0036376 (2001-11-01), Yamazaki et al.
patent: 2001-290363 (2001-10-01), None
patent: 2003-162142 (2003-06-01), None
patent: 2003-192756 (2003-07-01), None
patent: 2003-228230 (2003-08-01), None
Notification of Reason(s) for Refusal in JP 2006-163057 dated Apr. 15, 2008, and Translations thereof.

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