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:
Apr. 16, 2019
Filed:
Mar. 09, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Koji Shigehiro, Toride, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A developing apparatus includes a developer bearing member to bear developer containing toner and carrier to develop an electrostatic latent image formed on an image bearing member, a first chamber to supply developer to the developer bearing member, a second chamber to communicate with the first chamber to circulate developer, and a partition wall to separate the first and second chambers. An opening portion, through which an airflow from the second chamber toward the first chamber passes, is provided to the partition wall, and a length of the opening portion is equal to or longer than a length of a plurality of pitches of blades of a conveyance screw provided in the second chamber. A length, in the vertical direction, of the opening portion at a first position is longer than a length, in the vertical direction, of the opening portion at a second position.