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:
Jan. 18, 2022
Filed:
Jun. 12, 2020
Applicant:
Ricoh Company, Ltd., Tokyo, JP;
Inventors:
Kohei Hayasaka, Kanagawa, JP;
Tohru Moriya, Shizuoka, JP;
Yousuke Suzuki, Shizuoka, JP;
Atsushi Sasai, Shizuoka, JP;
Kazuki Washizu, Shizuoka, JP;
Assignee:
RICOH COMPANY, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/08 (2006.01); G03G 9/097 (2006.01); G03G 9/087 (2006.01);
U.S. Cl.
CPC ...
G03G 9/09733 (2013.01); G03G 9/0819 (2013.01); G03G 9/0821 (2013.01); G03G 9/08755 (2013.01); G03G 9/08797 (2013.01);
Abstract
A toner comprising a binder resin and a release agent is provided. When the toner is subjected to a FTIR-ATR mapping within a measurement range in a 50 μm square, divided in 1,024 pixels each in a 1.56 μm square, an average value of an intensity ratio of an absorption spectrum peak at a wavenumber of 2850 cmto an absorption spectrum peak at a wavenumber of 828 cmin each of the pixels is from 0.10 to 0.19, and a proportion of pixels in which the intensity ratio is 0.20 or higher to all the pixels is from 5% to 10%.