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. 19, 1994
Filed:
Oct. 05, 1992
Osamu Asakura, Tokyo, JP;
Yoshio Uchikata, Yokohama, JP;
Kenji Kawazoe, Kawasaki, JP;
Yuji Kanome, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An ink ribbon cassette includes a cassette case for housing an ink ribbon and feeding it along a feed path, an ink ribbon guide for guiding the ribbon along the ink path and a cantilevered spring member disposed at an intermediate portion of the feed path of the ink ribbon. The cantilevered spring member includes a frictioning portion for imparting a smaller tension to the ink ribbon when the ink ribbon is fed from a supply end to a take-up end, while imparting a greater tension to the ink ribbon when the ink ribbon is fed from the take-up end to the supply end. The spring member is provided at a free end with the frictioning portion and is bent at an intermediate portion such that a supported end of the spring member and the free end thereof face each other.