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. 02, 1986
Filed:
Mar. 21, 1985
Sukejiro Inoue, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A toner for developing electrostatic image excellent in harmonization of hot roller fixability, anti-offset characteristic and durability is provided by melt-kneading a binder resin and a colorant and pulverizing the kneaded product. The binder resin comprises a polymer having at least three peaks or shoulders in its chromatogram obtained by gel permeation chromatography, wherein the at least three peaks or shoulders include a peak or shoulder A having the largest molecular weight Ma of 2,000 to 80,000, a peak or shoulder C having the smallest molecular weight Mc satisfying, the relationship of Mc/Ma.gtoreq.150, and a peak or shoulder B having an intermediate molecular weight between the Ma and Mc.