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. 15, 2008
Filed:
Dec. 13, 2004
Nobuyasu Makino, Numazu, JP;
Masakazu Nakada, Numazu, JP;
Tohru Suganuma, Numazu, JP;
Fumitoshi Murakami, Fuji, JP;
Nobuyasu Makino, Numazu, JP;
Masakazu Nakada, Numazu, JP;
Tohru Suganuma, Numazu, JP;
Fumitoshi Murakami, Fuji, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A toner includes toner particles which have a binder resin and a colorant. The toner has a weight average particle diameter of from 4 to 7 μm and includes toner particles having a circle equivalent diameter of from 0.6 to 2.0 μm in an amount not greater than 5% by quantity, toner particles having a particle diameter of from 3.17 to 4.00 μm in an amount of from 10 to 40% by quantity, toner particles having a diameter of from 4.00 to 5.04 μm in an amount of from 20 to 40% by quantity, and toner particles having a diameter not less than 12.7 μm in an amount of from 0 to 1.0% by weight. The toner satisfies the following relationship: 1.04≦D/D≦1.30, wherein Drepresents the weight average particle diameter and Drepresents a number average particle diameter of the toner.