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:
Oct. 06, 2015
Filed:
Nov. 18, 2011
Toshikazu Tsuchiya, Susono, JP;
Masafumi Monde, Yokohama, JP;
Hidetoshi Hanamoto, Mishima, JP;
Tsutomu Ishida, Suntou, JP;
Toshikazu Tsuchiya, Susono, JP;
Masafumi Monde, Yokohama, JP;
Hidetoshi Hanamoto, Mishima, JP;
Tsutomu Ishida, Suntou, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A developing apparatus includes a developing unit configured to be detachable from and attachable to an image forming apparatus to contain a developer, a rotary member configured to rotate in the developing unit, and a detection unit installed on an internal surface of the developing unit and configured to detect a pressure caused by pressure through the developer by rotation of the rotary member. In addition, a measurement unit is configured to measure a period in which the pressure is changed, and a determination unit is configured to determine an amount of the developer in the developing unit based on the period detected by the measurement unit.