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. 18, 1990
Filed:
Aug. 28, 1989
Harumi Takahashi, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes a mechanism for detecting whether or not a detachably loaded maintenance unit is a genuine unit. A holding part holds the maintenance unit in a predetermined position by applying a predetermined pressure on the maintenance unit. A first engaging part is formed on a genuine maintenance unit, and a second engaging part is formed on the holding part. This second engaging part has a pressure conductive material provided thereon, and the first and second engaging parts have shapes such that one fits into the other when the genuine maintenance unit is in the predetermined position. A detecting part detects whether or not the genuine maintenance unit is in the predetermined position by detecting a change in a resistance of the pressure conductive material.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile