Image forming method and apparatus to maintain a high...

Details Image forming method and apparatus to maintain a high... Image forming method and apparatus to maintain a high...

2007-02-27

2007-02-27

Williams, Kimberly (Department: 2625)

Electrophotography

Image formation

Transfer

C399S303000, C399S149000, C399S142000

Reexamination Certificate

active

10303126

ABSTRACT:
An image forming apparatus having: an image forming body for forming a latent image and a toner image; a developing device for developing with a toner the latent image formed on the image forming body to form the toner image; a primary transfer device for transferring the toner image on the image forming body onto an intermediate transfer body; and a secondary transfer device for transferring the toner image on the intermediate transfer body onto an image support. The primary transfer device has conductive body or semi-conductive body, and is provided with a power supply unit for applying a bias voltage. It is characterized in that the variation coefficient of the shape factor of the toner is 16% or less, and the number variation coefficient of the number particle size distribution of the toner is 27% or less.

REFERENCES:
patent: 5729805 (1998-03-01), Chiba et al.
patent: 5915150 (1999-06-01), Kukimoto et al.
patent: 5998080 (1999-12-01), Ohno et al.
patent: 6841328 (2005-01-01), Shirose et al.
patent: 2001-318482 (2001-11-01), None

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