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:
Nov. 03, 2015
Filed:
Oct. 07, 2013
Applicants:
Masayuki Ishii, Shizuoka, JP;
Toyoshi Sawada, Kanagawa, JP;
Inventors:
Masayuki Ishii, Shizuoka, JP;
Toyoshi Sawada, Kanagawa, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/00 (2006.01); G03G 9/13 (2006.01); G03G 9/093 (2006.01);
U.S. Cl.
CPC ...
G03G 9/09321 (2013.01); G03G 9/09342 (2013.01); G03G 9/09371 (2013.01);
Abstract
Toner contains a mother toner particle containing a binder resin and a coloring agent and an external additive to cover the mother toner particle, wherein the external additive contains a resin particle, wherein the resin particle has an outer shell layer formed of silica or modified silica, wherein the resin particle has a non-spherical form with a shape factor (SF) of 1.20 or greater as calculated by the following relationship 1,Shape factor(SF)=[(Absolute maximum length of particle)/Projected area of particle)]×(π/4)  Relation 1.