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:
Sep. 18, 2007
Filed:
Aug. 24, 2004
Yoshiyasu Matsumoto, Hino, JP;
Meizo Shirose, Hachioji, JP;
Naohiro Hirose, Hachioji, JP;
Tatsuya Nagase, Tachikawa, JP;
Asao Matsushima, Hino, JP;
Shiro Hirano, Hachioji, JP;
Yoshiyasu Matsumoto, Hino, JP;
Meizo Shirose, Hachioji, JP;
Naohiro Hirose, Hachioji, JP;
Tatsuya Nagase, Tachikawa, JP;
Asao Matsushima, Hino, JP;
Shiro Hirano, Hachioji, JP;
Abstract
An image forming method for forming a full color toner image by overlaying four color electrostatic image developing toners of black, yellow, magenta and cyan, wherein at least one of the four color electrostatic image developing toners is a toner containing a large diameter external additive in a larger amount and at least one is a toner containing the large diameter external additive in a smaller amount, in which the primary particle diameter of the large diameter external additive is from 150 nm to 2,000 nm, the content of the large diameter external additive in the toner containing the large diameter external additive in larger amount is from 0.06% by weight to 4.0% by weight and the content of the large diameter external additive in the toner containing the large diameter external additive in the smaller amount is not more than 0.05% by weight.