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:
Dec. 01, 2020
Filed:
Jul. 11, 2017
Canon Kabushiki Kaisha, Tokyo, JP;
Tomoyuki Sakamaki, Toride, JP;
Mitsuhiro Furukawa, Kawaguchi, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A developing apparatus includes a sleeve for carrying a developer including toner and magnetic carrier, the sleeve having a plurality of grooves extending in a longitudinal direction; a magnet provided inside the sleeve, a non-magnetic regulating member, provided spaced from the sleeve, wherein an amount M/S (mg/mm) of the developer carried on a unit area of the sleeve after passing by the regulating member, a gap SB (mm) between a free end of the regulating member and the sleeve, a density G (mg/mm) of the developer, and a groove ratio α which is a ratio of the grooves in the surface of the sleeve satisfy,0.1≤(mg/mm)≤0.5,0.2≤(mm), and(mg/mm)×1/4≤α×{(mm)+(mm)}×(mg/mm)<(mg/mm).