The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 16, 1999
Filed:
Sep. 14, 1995
Yoshimichi Katagiri, Kawasaki, JP;
Hitoshi Kusaba, Kawasaki, JP;
Yasuharu Takeuchi, Kawasaki, JP;
Yuzo Horikoshi, Kawasaki, JP;
Makoto Koshi, Kawasaki, JP;
Hiroichi Ishihara, Kobe, JP;
Yoshiaki Ishibashi, Kakogawa, JP;
Yoshihiro Makuta, Kawasaki, JP;
Jun Saito, Kawasaki, JP;
Hiroaki Naito, Hyogo, JP;
Fujitsu Limited, Kawasaki, JP;
Harima Chemicals, Inc., Kakogawa, JP;
Abstract
A toner binder comprising a crosslinked polyester resin obtained by using 0.1 to 3 mol % of trimellitic acid and 0.1 to 5 mol % of an epi-bis type epoxy in combination as crosslinking components, said binder having a number average molecular weight (Mn) in the chromatogram determined by a gel permeation chromatography on the non-gel portion of the polyester resin, of 2,000 to 4,000, a ratio (Mw/Mn) of the weight average molecular weight to the number average molecular weight of 10 to 25 and a (percent gel) of the residue unsoluble in tetrahydrofuran solvent of 1 wt % or less. A toner composition for flash fixing comprising the above-described binder as an essential constituent component. The toner and the toner binder exhibit good fixability and void resistance upon flash fixing and produce little fixing odor.