Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Reexamination Certificate
2005-06-14
2005-06-14
Chapman, Mark A. (Department: 1756)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
C430S111310, C430S111400
Reexamination Certificate
active
06905806
ABSTRACT:
A dry two-component developer for electrophotography comprising a carrier particle and a toner particle, wherein a toner water adsorption ratio (T) obtained by a following equation (1) for the toner particle ranges from 1.0 to 7.0 and a carrier water adsorption ratio (C) obtained by a following equation (2) is 20.0 or less, and a water adsorption ratio (T/C) expressed in a following equation (3) representing a relationship between the toner water adsorption ratio (T) and the carrier water adsorption ratio (C) is 5.0 or less;a toner water adsorption ratio (T)=a water adsorption amount (TH) of the toner particle/an N2adsorption amount (TN) of the toner particle (1),a carrier water adsorption ratio (C)=a water adsorption amount (CH) of the carrier particle/an N2 adsorption amount (CN) of the carrier particle (2), anda water adsorption ratio (T/C)=a toner water adsorption ratio (T)/a carrier water adsorption ratio (C) (3).
REFERENCES:
patent: 5558967 (1996-09-01), Nagatsuka et al.
patent: 08-030022 (1996-02-01), None
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patent: 11-295934 (1999-10-01), None
patent: 2000-010341 (2000-01-01), None
Itagoshi Tsuyoshi
Kobayashi Hiromichi
Naito Takeshi
Sato Yuji
Chapman Mark A.
Powdertech Co., Ltd.
The Webb Law Firm P.C.
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