Process cartridge and image forming apparatus that...

Details Process cartridge and image forming apparatus that... Process cartridge and image forming apparatus that...

2006-09-27

2009-10-06

Royer, William J (Department: 2852)

Electrophotography

Internal machine environment

Particle or contaminant control

C399S111000, C399S159000, C399S350000

Reexamination Certificate

active

07599644

ABSTRACT:
An image forming apparatus suppresses the deposition of transfer-residual toner on a sealing sheet and also suppresses the dropping of deposited toner therefrom, at a high temperature and in a high humidity environment. The apparatus includes a photosensitive drum, a cleaning blade for removing toner, a housing portion for housing the toner removed by the cleaning blade, and a sealing sheet for preventing the leakage of toner and performs charge elimination upstream of the sealing sheet in the direction of movement of the photosensitive drum, wherein a work function difference between the sealing sheet and the photosensitive drum is equal to or greater than 0.25 eV.

REFERENCES:
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patent: 5991568 (1999-11-01), Ziegelmuller et al.
patent: 6819899 (2004-11-01), Miyakawa et al.
patent: 7027758 (2006-04-01), Miyakawa et al.
patent: 2005/0220464 (2005-10-01), Kobayashi et al.
patent: 2006/0188292 (2006-08-01), Matsuda et al.
patent: 1-21323 (1989-06-01), None
patent: 2000-227668 (2000-08-01), None

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