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:
Mar. 13, 2012
Filed:
Dec. 18, 2008
Tomofumi Yoshida, Osaka, JP;
Hirobumi Ooyoshi, Osaka, JP;
Kenzo Tatsumi, Osaka, JP;
Tomohiro Kubota, Osaka, JP;
Yoshiyuki Shimizu, Hyogo, JP;
Yoshihiro Kawakami, Hyogo, JP;
Osamu Saito, Osaka, JP;
Manabu Hamada, Osaka, JP;
Tomofumi Yoshida, Osaka, JP;
Hirobumi Ooyoshi, Osaka, JP;
Kenzo Tatsumi, Osaka, JP;
Tomohiro Kubota, Osaka, JP;
Yoshiyuki Shimizu, Hyogo, JP;
Yoshihiro Kawakami, Hyogo, JP;
Osamu Saito, Osaka, JP;
Manabu Hamada, Osaka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A toner transport screw that is capable of maintaining a smooth and stable transport function. The toner transport screw, in which a helical blade is disposed on the circumference of a rotating shaft, has at least one spiral direction reversal part formed by connecting the respective ends of a first blade part and a second blade part, the directions of spiral of the first blade part and the second blade part being in opposite directions. A passage, which allows the toner to pass through the blades in the circumferential direction of the rotating shaft, is formed in the spiral direction reversal part.