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. 18, 2011
Filed:
Mar. 16, 2007
Mitsuyo Matsumoto, Ibaraki, JP;
Chiyoshi Nozaki, Otsu, JP;
Tsuyoshi Nozaki, Ikeda, JP;
Minoru Nakamura, Takarazuka, JP;
Atsushi Yamamoto, Kawanishi, JP;
Mitsuyo Matsumoto, Ibaraki, JP;
Chiyoshi Nozaki, Otsu, JP;
Tsuyoshi Nozaki, Ikeda, JP;
Minoru Nakamura, Takarazuka, JP;
Atsushi Yamamoto, Kawanishi, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
To provide a toner for developing a latent electrostatic image comprising at least a colorant, a wax, and a binder resin, wherein Iwax (s) is a value measured by FTIR-ATR Spectroscopy before heating a mirror-surfaced pellet formed by compressing and molding the toner, and Iwax (t) is a value measured by FTIR-ATR Spectroscopy after heating the pellet at a surface temperature thereof of 130° C. for 1 minute satisfy Formulae (1), (2), (3), and (4),wax ()≧0.2*100/[  Formula (1)wax ()≦0.26  Formula (2)wax ()≦0.50  Formula (3)wax ()>wax ()  Formula (4) wherein both Iwax(s) and Iwax(t) are obtained by a formula: absorbance derived from the wax (2850 cm)/absorbance derived from the binder resin (828 cm).