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:
Oct. 23, 2012
Filed:
Jun. 22, 2011
Katsuhisa Yamazaki, Numazu, JP;
Masami Fujimoto, Sunto-gun, JP;
Masaaki Taya, Mishima, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An object of the present invention is to provide a toner which allows fixation at low temperatures, which is excellent in anti-offset ability, and which provides a high quality image at high and low humidities in a stable manner without causing any image defect over time. Provided is a toner, containing at least a binder resin and a colorant in which: the binder resin in the toner contains 60% by mass or more of a styrene/acryl resin and a THF-insoluble fraction A which is an extraction residue obtained by carrying out Soxhlet extraction with tetrahydrofuran (THF) for 16 hours; the THF-insoluble fraction A contains a TOL-insoluble fraction B which is an extraction residue obtained by carrying out Soxhlet extraction with toluene (TOL) for 16 hours; and a mass ratio (B/A) between the THF-insoluble fraction A and the TOL-insoluble fraction B is in the range of 0.1≦B/A≦0.5.