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. 28, 2006
Filed:
Mar. 08, 2002
Hiroshi Yamashita, Numazu, JP;
Kazuhito Watanabe, Yokohama, JP;
Chiaki Tanaka, Shizuoka-ken, JP;
Tsunemi Sugiyama, Numazu, JP;
Shigeru Emoto, Numazu, JP;
Masami Tomita, Numazu, JP;
Hiroshi Yamashita, Numazu, JP;
Kazuhito Watanabe, Yokohama, JP;
Chiaki Tanaka, Shizuoka-ken, JP;
Tsunemi Sugiyama, Numazu, JP;
Shigeru Emoto, Numazu, JP;
Masami Tomita, Numazu, JP;
Ricoh Company Limited, Tokyo, JP;
Abstract
A toner composition including toner particles including a binder resin; and a colorant, and a charge controlling agent which is at least located on a surface of the toner particles, wherein the toner composition has a spherical degree of from 0.96 to 0.99, and wherein the toner composition satisfies the relationship: 10≦M/T≦1,000 wherein M represents a quantity of an element on a surface of the toner particles in units of % by weight, wherein the element is included only in the charge controlling agent, and is one of elements of second to fifth periodical elements in the long form periodic table other than hydrogen, carbon, oxygen and rare gas elements; and T represents a quantity of the element in the toner composition in units of % by weight.