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:
Dec. 27, 1994
Filed:
Dec. 08, 1992
Mitsuhiro Sasaki, Wakayama, JP;
Kuniyasu Kawabe, Wakayama, JP;
Kao Corporation, Tokyo, JP;
Abstract
The present invention is directed to an encapsulated toner for heat-and-pressure fixing, which has a heat-fusible core material containing at least a coloring agent and a shell formed thereon so as to cover the surface of the core material. The core material includes a thermoplastic resin as its main components produced by a polymerization reaction, at the time of encapsulation, of 0.05 to 20 parts by weight of the (A) .alpha.,.beta.-ethylenic copolymerizable monomer having an acid anhydride group and 99.95 to 80 parts by weight of the (B) other .alpha.,.beta.-ethylenic copolymerizable monomer. Alternatively, the core material contains a copolymer having one or more acid anhydride groups added as one component of the core material resin-constituting material at the time of encapsulation.