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:
Jul. 01, 2003
Filed:
Jul. 09, 2001
Wakashi Iida, Numazu, JP;
Takaaki Kohtaki, Mishima, JP;
Nobuyoshi Sugawara, Suntoh-gun, JP;
Takayuki Itakura, Mishima, JP;
Yojiro Hotta, Numazu, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A toner, particularly a color toner suitable for full-color image formation through a substantially oil-less heat-pressure fixing device, is formed from at least a binder resin, a colorant and a wax. The toner has viscoelasticity including: a storage modulus at 80° C. (G′ ) in a range of 1×10 -1×10 dN/m , storage moduli at temperatures of 120-180° C. (G′ ) in a range of 5×10 -1×10 dN/m , and loss tangents (tan &dgr;=G″/G′ as a ratio between G″ (loss modulus) and G′ (storage molecules)) including a loss tangent at 180° C. (tan &dgr; ) and a minimum of loss tangents over a temperature range of 120-180 ° C. (tan &dgr; ) satisfying 1≦tan &dgr; /tan &dgr; . The toner further exhibits a thermal behavior providing a heat-absorption curve according to differential scanning calorimetry (DSC) showing a maximum heat-absorption peak temperature in a range of 50-110° C. in a temperature range of 30-200° C.