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. 23, 1993
Filed:
Apr. 18, 1991
Shigeyuki Miya, Utsunomiya, JP;
Takenori Shibata, Utsunomiya, JP;
Yoshihiro Komatsu, Imaichi, JP;
Hiromichi Miyoshi, Utsunomiya, JP;
Tadashi Hirata, Kawagoe, JP;
Yoshio Taniguchi, Tokyo, JP;
Takuo Kobayashi, Utsunomiya, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A developing apparatus of the type including a developing roller disposed in a development box, a stirring roller parallel spaced apart from the developing roller, and a toner replenisher pipe disposed in the stirring roller, wherein the stirring roller has a substantially hollow cylindrical shape and includes a plurality of axial ribs extending parallel to a longitudinal axis of the stirring roller and disposed equidistantly from the longitudinal axis, and a plurality of helical blades integral with the axial ribs and skewed relative to the longitudinal axis of the stirring roller, said hollow cylindrical stirring roller being composed of at least two identical segments which are divided by a plane extending through said longitudinal axis of said stirring roller. The stirring roller is simple in construction and can be manufactured at a low cost. The developing apparatus further includes a separator for receiving an excess developer which is removed from the outside surface of the developing roller and direct it unto the stirring roller.