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:
Jun. 15, 2010
Filed:
Apr. 20, 2006
Takahiro Honda, Numazu, JP;
Hiroyuki Fushimi, Numazu, JP;
Shuuichi Endoh, Kamakura, JP;
Masato Iio, Yokohama, JP;
Shinya Tanaka, Ota, JP;
Takahiro Honda, Numazu, JP;
Hiroyuki Fushimi, Numazu, JP;
Shuuichi Endoh, Kamakura, JP;
Masato Iio, Yokohama, JP;
Shinya Tanaka, Ota, JP;
Ricoh Company Limited, Tokyo, JP;
Abstract
An image forming apparatus including an image bearing member and a developing device configured to develop an electrostatic image on the image bearing member with a toner to form a toner image thereon and including a developing unit configured to develop the electrostatic image, and a toner cartridge configured to supply the toner to the developing unit through at least one opening, wherein the developing device circulates the toner between the toner cartridge and the developing unit through the at least one opening, and wherein the internal temperature of the hopper is higher than that of the cartridge and the ratio of a charge quantity distribution parameter of the toner under a condition of 45° C. and 54% RH to that under a condition of 25° C. and 54% RH is greater than 0.9 and less than 1.5.