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:
Nov. 25, 2008
Filed:
Sep. 16, 2005
Tsuneyasu Nagatomo, Numazu, JP;
Akihiro Kotsugai, Numazu, JP;
Hiroshi Yamashita, Numazu, JP;
Masayuki Ishii, Numazu, JP;
Hiroto Higuchi, Machida, JP;
Osamu Uchinokura, Mishima, JP;
Satoshi Mochizuki, Numazu, JP;
Fumihiro Sasaki, Fuji, JP;
Hisashi Nakajima, Numazu, JP;
Hideki Sugiura, Fuji, JP;
Yasuo Asahina, Numazu, JP;
Shinya Nakayama, Numazu, JP;
Koichi Sakata, Numazu, JP;
Tomoyuki Ichikawa, Kawasaki, JP;
Takuya Saito, Numazu, JP;
Sonoh Matsuoka, Numazu, JP;
Tsuneyasu Nagatomo, Numazu, JP;
Akihiro Kotsugai, Numazu, JP;
Hiroshi Yamashita, Numazu, JP;
Masayuki Ishii, Numazu, JP;
Hiroto Higuchi, Machida, JP;
Osamu Uchinokura, Mishima, JP;
Satoshi Mochizuki, Numazu, JP;
Fumihiro Sasaki, Fuji, JP;
Hisashi Nakajima, Numazu, JP;
Hideki Sugiura, Fuji, JP;
Yasuo Asahina, Numazu, JP;
Shinya Nakayama, Numazu, JP;
Koichi Sakata, Numazu, JP;
Tomoyuki Ichikawa, Kawasaki, JP;
Takuya Saito, Numazu, JP;
Sonoh Matsuoka, Numazu, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
It is an object of the present invention to provide a toner that can sustain favorable transferability and cleaning ability for prolonged periods; prevent photoconductor filming; exhibit no variation in image nonuniformity or external additive immersion induced by developer agitation at the time of use; excels in stability with flowability and charge stability over prolonged periods. Therefore, provided is the toner of which the quantity of aggregate of residual external additives found on the sieve of 635-mesh and 452 cmof mesh area, after 0.2 g of the toner on the sieve is blasted with air at a blow pressure of 0.2 MPa from 160 mm above the sieve while being air-suctioned at a suction force of 5 mmHg, and then air-suctioned at a suction force of 20 mmHg, is 4,500 or less and 5 or more.