Toner and image forming apparatus using the same

Details Toner and image forming apparatus using the same Toner and image forming apparatus using the same

2006-04-04

2006-04-04

Goodrow, John L (Department: 1756)

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

C430S108700

Reexamination Certificate

active

07022447

ABSTRACT:
The present invention provides a toner which ensures large mean charging amount and excellent transfer efficiency with no or little amount of reversely charged toner and provides an image forming apparatus using the same. The toner is produced by adding external additives to resin particles containing a coloring agent, wherein the external additives are silica particles and modified silica particles of which outer surfaces are modified with oxide or hydroxide of at least one metal selected from a group consisting of titanium, tin, zirconium, and aluminum, the amount of the modified silica particles being 1.5 times or less of the amount the silica particles. The image forming apparatus uses the toner.

REFERENCES:
patent: 6190814 (2001-02-01), Law et al.
patent: 6819899 (2004-11-01), Miyakawa et al.
patent: 2002-029730 (2002-01-01), None
patent: 2002-148848 (2002-05-01), None

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