Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1998-10-07
2000-10-31
Martin, Roland
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430110, 430111, G06G 909, G06G 9097
Patent
active
061400009
ABSTRACT:
A toner for electrophotography comprises a resin, a colorant and a charge controlling agent, wherein the charge controlling agent is substantially present on a surface part of the toner, and wherein the toner has a saturated charge quantity (absolute value) of from about 10-40 .mu.C/g when the toner is mixed with a carrier which is coated with a silicone resin, and a carrier contamination degree not greater then about 20%.
REFERENCES:
patent: 4620987 (1986-11-01), Yamashita et al.
patent: 5225302 (1993-07-01), Isoda et al.
patent: 5368972 (1994-11-01), Yamashita et al.
patent: 5403690 (1995-04-01), Kuramoto et al.
patent: 5429900 (1995-07-01), Asanae et al.
patent: 5565298 (1996-10-01), Suguro et al.
Derwent Abstracts, AN 98-366887, JP 10-142838, May 29, 1998.
Martin Roland
Ricoh & Company, Ltd.
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