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.

Date of Patent:
Nov. 03, 2015

Filed:

Aug. 05, 2013
Applicants:

Satoyuki Sekiguchi, Shizuoka, JP;

Hiroshi Yamashita, Shizuoka, JP;

Minoru Masuda, Shizuoka, JP;

Susumu Chiba, Shizuoka, JP;

Tatsuya Morita, Kanagawa, JP;

Atsushi Yamamoto, Osaka, JP;

Shinya Nakayama, Shizuoka, JP;

Masahide Yamada, Shizuoka, JP;

Kohsuke Nagata, Shizuoka, JP;

Keiji Makabe, Shizuoka, JP;

Toyoshi Sawada, Kanagawa, JP;

Inventors:

Satoyuki Sekiguchi, Shizuoka, JP;

Hiroshi Yamashita, Shizuoka, JP;

Minoru Masuda, Shizuoka, JP;

Susumu Chiba, Shizuoka, JP;

Tatsuya Morita, Kanagawa, JP;

Atsushi Yamamoto, Osaka, JP;

Shinya Nakayama, Shizuoka, JP;

Masahide Yamada, Shizuoka, JP;

Kohsuke Nagata, Shizuoka, JP;

Keiji Makabe, Shizuoka, JP;

Toyoshi Sawada, Kanagawa, JP;

Assignee:

Ricoh Company, Ltd., Tokyo, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/00 (2006.01); G03G 9/087 (2006.01); G03G 9/13 (2006.01); G03G 9/08 (2006.01);
U.S. Cl.
CPC ...
G03G 9/08764 (2013.01); G03G 9/0804 (2013.01); G03G 9/08755 (2013.01); G03G 9/08795 (2013.01); G03G 9/08797 (2013.01);
Abstract

Toner contains a binder resin containing a crystalline resin having a urethane and/or urea bonding; and a colorant, wherein in a diffraction spectrum of the toner as measured by an X-ray diffraction instrument, a ratio {C/(C+A)} of an integral intensity C of the spectrum derived from the crystalline structure to an integral intensity A of the spectrum derived from the non-crystalline structure is 0.12 or greater, wherein the toner satisfies the following relation 1: T1−T2≦30° C. (Relation 1), where T1 represents the maximum endothermic peak in the first temperature rising from 0° C. to 100° C. at the temperature rising rate of 10° C./min and T2 represents the maximum exothermic peak in the first temperature falling from 100° C. to 0° C. at the temperature falling rate of 10° C./min as T1 and T2 are measured by diffraction scanning calorimetry (DSC).


Find Patent Forward Citations

Loading…