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. 02, 2003
Filed:
Mar. 12, 2001
Kazuyuki Sugihara, Kanagawa-ken, JP;
Ricoh Co., Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes a development mechanism using a two-component development agent and which includes a development roller and first and second transfer screws. The first transfer screw, arranged at a position approximately horizontal and in parallel to the development roller, includes a first number of screw spirals for transferring the development agent from a first end to a second end of the first transfer screw and conveying the development agent to the development roller. The second transfer screw, arranged approximately horizontal and in parallel to the first transfer screw, includes a second number of screw spirals for transferring the development agent from a first end to a second end of the second transfer screw and conveying the development agent from the second end of the second transfer screw to the first end of the first transfer screw. The first and second numbers of the screw spirals are different from each other.