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:
Feb. 19, 2013
Filed:
Sep. 15, 2008
Hyo Shu, Mishima, JP;
Yasuaki Iwamoto, Numazu, JP;
Yasutada Shitara, Numazu, JP;
Minoru Masuda, Numazu, JP;
Hyo Shu, Mishima, JP;
Yasuaki Iwamoto, Numazu, JP;
Yasutada Shitara, Numazu, JP;
Minoru Masuda, Numazu, JP;
Ricoh Company Limited, Tokyo, JP;
Abstract
A toner is provided including a mother toner including a crystalline polyester resin, an amorphous resin, and a wax, and an external additive in an amount of from 0.30 to 0.55 parts by weight based on 100 parts by weight of the mother toner. The toner satisfies the following equation 0.36≦(2.77×C/R+1.97×W/R)/X≦1.85, wherein each of C, W, and R represents a height of an absorbance peak specific to the crystalline polyester resin, the wax, and the amorphous resin, respectively, measured by a FT-IR ATR method, and X represents an amount (parts by weight) of the external additive. An image forming method and apparatus using the toner are also provided.