Image forming apparatus and secondary transfer roller...

Details Image forming apparatus and secondary transfer roller... Image forming apparatus and secondary transfer roller...

2008-09-04

2010-06-29

Ngo, Hoang (Department: 2852)

Electrophotography

Internal machine environment

Particle or contaminant control

Reexamination Certificate

active

07747188

ABSTRACT:
A secondary transfer roller rotates in a first rotation direction during printing, and rotates in a second rotation direction opposite to the first rotation direction during a stop of the printing only within a specified range. When an image forming apparatus includes a lubricant supply unit, the secondary transfer roller rotates in the second rotation direction within the range where an amount of movement of a contact surface between the secondary transfer roller and the cleaning member is 3 mm or more and not larger than a distance on the contact surface from a contact part between the secondary transfer roller and the lubricant supply unit to a contact part between the secondary transfer roller and the cleaning member in the second rotation direction.

REFERENCES:
patent: 5298953 (1994-03-01), Lindblad et al.
patent: 5568243 (1996-10-01), Durfee et al.
patent: 7317884 (2008-01-01), Terae et al.
patent: 11-035185 (1999-02-01), None
patent: 2004-094055 (2004-03-01), None

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