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. 03, 2019
Filed:
May. 01, 2018
Tomohiro Kubota, Kanagawa, JP;
Naoki Nakatake, Tokyo, JP;
Minoru Toyoda, Kanagawa, JP;
Kazuki Matsumoto, Kanagawa, JP;
Kenji Nakamura, Kanagawa, JP;
Tomohiro Kubota, Kanagawa, JP;
Naoki Nakatake, Tokyo, JP;
Minoru Toyoda, Kanagawa, JP;
Kazuki Matsumoto, Kanagawa, JP;
Kenji Nakamura, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A developing device is provided which includes: a developing roller in contact with or facing an image bearer; a supply roller to supply toner to the developing roller; a casing; a first conveyer disposed within the casing and above the supply roller to supply toner stored in the developing device to the supply roller, while forming a first conveyance path; a second conveyer disposed within the casing with an upper end thereof positioned below that of the first conveyer, while forming a second conveyance path forming a toner circulation path together with the first conveyance path; a partition wall separating the first conveyance path and the second conveyance path in a longitudinal direction within a range excluding both longitudinal end portions; and a toner supply port, at a ceiling of the casing above the second conveyance path, through which toner is supplied to an inside of the developing device.