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. 27, 2007
Filed:
Sep. 11, 2003
Hiroshi Kamada, Minamiashigara, JP;
Masaaki Suwabe, Minamiashigara, JP;
Yasuo Kadokura, Minamiashigara, JP;
Michio Take, Minamiashigara, JP;
Takao Ishiyama, Minamiashigara, JP;
Hiroshi Kamada, Minamiashigara, JP;
Masaaki Suwabe, Minamiashigara, JP;
Yasuo Kadokura, Minamiashigara, JP;
Michio Take, Minamiashigara, JP;
Takao Ishiyama, Minamiashigara, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
The present invention provides a tandem-type image forming method using a trickle developing system, wherein the average circularity of a toner contained in at least a supplementary developer used for appropriately supplying a developer to a developing device is in the range of 0.940 to 0.980. In the toner, the ratio of the number of particles having an average circularity of 0.970 or greater, in a particle diameter range of a toner circle-equivalent diameter×3/5 or less, is 5% or less, and the ratio of the number of particles having an average circularity of 0.950 or less, in a particle diameter range of a toner circle-equivalent diameter×7/5 or greater, is 10% or less.