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:
Apr. 14, 2009
Filed:
Dec. 16, 2005
Ryota Kashiwabara, Numazu, JP;
Satoshi Matsunaga, Mishima, JP;
Ryota Kashiwabara, Numazu, JP;
Satoshi Matsunaga, Mishima, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A toner formed of at least a binder resin, a colorant, a charge control agent and a wax, is provided with a uniform state of dispersion of the wax and good balance of low-temperature fixability and anti-high-temperature offset characteristic, while exhibiting good developing performances over wide environmental conditions. The toner is characterized in that (a) the binder resin comprises a hybrid resin component having a polyester unit and a vinyl polymer unit, (b) the toner exhibits a loss tangent (tan δ) of 1.0 at a temperature in a range of 80-160° C., and (c) the toner provides a DSC curve showing a heat-absorption peak in a temperature range of 85-130° C. on temperature increase as measured according to differential scanning calorimetry (DSC).