Developing roller, process for its production, developing...

Details Developing roller, process for its production, developing... Developing roller, process for its production, developing...

2006-10-20

2010-06-01

Bryant, David P (Department: 3726)

Roll or roller

Rotatable relative to supporting shaft

Coating treatment or applicator

C492S017000

Reexamination Certificate

active

07727134

ABSTRACT:
A developing roller having a surface layer which contains a urethane resin composed of a reaction product of an isocyanate with a group of specific alcohols and has a surface having a contact angle to ethylene glycol of from 60.0 degrees or more to 90.0 degrees or less and a contact angle to diiodomethane of from 30.0 degrees or more to 38.0 degrees or less. The developing roller is highly reliable as having controlled banding which is an image difficulty caused at the part of contact between the developing roller and a developer feed roller.

REFERENCES:
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patent: 5047270 (1991-09-01), Mori et al.
patent: 6824845 (2004-11-01), Wachi et al.
patent: 2003/0044584 (2003-03-01), Wachi et al.
patent: 2007/0292181 (2007-12-01), Oda et al.
patent: 7-013415 (1995-01-01), None
patent: 9-087354 (1997-03-01), None

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