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. 04, 1991
Filed:
Jun. 16, 1989
Tamio Yoshikai, Kyoto, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A developing unit including: a developing roller disposed in a developer tank in a location facing a recording medium; a supply passage for supplying developer to the developing roller; a shut-off device that is rotatable about the center axis thereof for opening and closing the supply passage; switching means that is provided with a spring clutch for transmitting rotational driving force to the shut-off device and is used for switching the shut-off device between the open and closed states; and a stopping position correcting mechanism for preventing variations in the stopping position of the shut-off device, the correcting mechanism having a clutch fixing plate mounted with screws on the outer wall of the developer tank in a slidable way around the center axis of the shut-off device and an engaging plate projecting from the clutch fixing plate and engaging with the case of the spring clutch.