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:
Sep. 20, 2005
Filed:
Aug. 26, 2003
Masanori Suzuki, Shizuoka, JP;
Takuya Saito, Shizuoka, JP;
Hiroshi Yamashita, Shizuoka, JP;
Yohichiroh Watanabe, Shizuoka, JP;
Takeshi Takada, Shizuoka, JP;
Tsunemi Sugiyama, Shizuoka, JP;
Satoshi Mochizuki, Shizuoka, JP;
Yasuaki Iwamoto, Shizuoka, JP;
Takayuki Koike, Kanagawa, JP;
Masanori Suzuki, Shizuoka, JP;
Takuya Saito, Shizuoka, JP;
Hiroshi Yamashita, Shizuoka, JP;
Yohichiroh Watanabe, Shizuoka, JP;
Takeshi Takada, Shizuoka, JP;
Tsunemi Sugiyama, Shizuoka, JP;
Satoshi Mochizuki, Shizuoka, JP;
Yasuaki Iwamoto, Shizuoka, JP;
Takayuki Koike, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A color toner which gives a suitable image gloss and has an excellent color reproducibility, which has sufficient anti-offset properties even when a release oil is not coated on a fixing roller or is coated in only a small amount, and which has excellent transfer properties, durability, and charge stability relative to humidity is disclosed. Also, an image-forming apparatus using the color toner and a toner container filled with the color toner are disclosed. The color toner comprises a continuous phase of a resin containing a urea-modified polyester resin; and a modified resin dispersed in the continuous phase, wherein the modified resin contains a release polymer portion containing a release polymer; and a modified portion containing a plurality of vinyl monomer units, the modified portion having an average ester group concentration of 8% by weight to 30% by weight.