Electrophotography – Image formation – Development
Reexamination Certificate
2011-03-01
2011-03-01
Porta, David P (Department: 2884)
Electrophotography
Image formation
Development
C399S274000, C399S265000, C399S284000, C399S286000, C492S048000, C492S053000, C492S056000
Reexamination Certificate
active
07899375
ABSTRACT:
A developer carrier has concave portions regularly arranged on the surface thereof and being rotatable with a developer thereon. A contact member is made of an elastic rubber material, is in contact with the surface of the developer carrier, and vibrates with the rotation of the developer carrier. A value obtained by dividing a movement speed of the surface at the time of rotation of the developer carrier by a pitch of the concave portions in a peripheral direction of the developer carrier is smaller than a peak vibrational frequency of the contact member when a loss tangent obtained by dividing a loss elastic modulus of the contact member by a storage elastic modulus is the greatest.
REFERENCES:
patent: 2005/0069348 (2005-03-01), Fujita et al.
patent: 2005/0078985 (2005-04-01), Okamura
patent: 2005-128311 (2005-05-01), None
patent: 2006-259384 (2006-09-01), None
patent: 2006259384 (2006-09-01), None
Mott et al. Acoustic and dynamic mechanical properties of a polyurethane rubber, Journal of the Acoustical Society of America, vol. 111, No. 4 (Apr. 2002), pp. 1782-1790.
Block An instant bond: silicone reactive hot melt for plastics [online], Sep. 2006 [retrieved on Feb. 24, 2010]. Retrieved from the Internet:< URL: http://www.ascouncil.org
ews/endusermaterials/presentations/DowCorning-ATE06.pdf>.
Fukumoto Takatomo
Kato Hiroshi
Kobayashi Osamu
DLA Piper (LLP) US
Lee Shun
Porta David P
Seiko Epson Corporation
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