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. 19, 2019
Filed:
Mar. 02, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Yuta Okuyama, Kashiwa, JP;
Tomoyuki Sakamaki, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A development device includes a magnetic field generation unit having a developing magnetic pole S, a magnetic pole N, and a magnetic pole N. The magnetic poles Nand Nare disposed adjacent to the magnetic pole S, at positions downstream and upstream of the magnetic pole Sin a rotation direction of a sleeve, respectively. The magnetic pole Nis configured to have a larger magnetic flux density and full width half maximum in a normal direction of the sleeve and have a smaller inter-pole distance from the developing magnetic pole than the magnetic pole N, so that the rising position of magnetic brushes of developer is shifted in the upstream direction, and the magnetic brushes come into contact with a photosensitive drum more suitably.