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:
Jun. 18, 2019
Filed:
Feb. 06, 2018
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Yuta Okuyama, Kashiwa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 13/09 (2006.01); G03G 15/20 (2006.01); G03G 21/16 (2006.01); G03G 9/107 (2006.01); G03G 9/083 (2006.01); G03G 15/08 (2006.01); G03G 15/09 (2006.01); G03G 15/01 (2006.01);
U.S. Cl.
CPC ...
G03G 13/09 (2013.01); G03G 9/0834 (2013.01); G03G 9/107 (2013.01); G03G 9/1075 (2013.01); G03G 15/0818 (2013.01); G03G 15/0928 (2013.01); G03G 15/2053 (2013.01); G03G 21/168 (2013.01); G03G 15/0115 (2013.01);
Abstract
A developing device includes a developing sleeve configured to carry and convey developer containing non-magnetic toner and magnetic carrier and having a plurality of concave parts on a surface thereof. The concave parts are periodically arranged in each of a rotation direction and a width direction of the developing sleeve, and each have a shape that can house a circular shape having a diameter equal to an average particle diameter of the carrier carried on the developing sleeve, in a planar view. A distance between the concave parts is smaller than the average particle diameter.