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. 12, 2013
Filed:
Nov. 09, 2007
Hideyuki Yamaguchi, Numazu, JP;
Hachiroh Tosaka, Shizuoka, JP;
Tomoyuki Satoh, Numazu, JP;
Ricoh Company, Ltd., Tokyo, JP;
Xeikon Manufacturing N.V., Lier, BE;
Abstract
A toner is provided including toner particles A having a circularity of greater than 0.93 and not greater than 1.00 and toner particles B having a circularity of from 0.85 to 0.93, wherein the following relationships are satisfied: 70≦R≦95, 5≦R≦30, 0.014≦SD≦0.025, and 0.940≦ED≦0.950, wherein R(% by number) represents a ratio of a number of the toner particles A to a total number of toner particles included in the toner, R(% by number) represents a ratio of a number of the toner particles B to the total number of toner particles included in the toner, SD represents a standard deviation of circularity of the toner particles A, and ED represents an average envelope degree of the toner particles B.