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. 11, 1983
Filed:
Feb. 22, 1982
Thomas E Frechette, Windsor Locks, CT (US);
Royal Business Machines, Inc., Windsor, CT (US);
Abstract
An ink ribbon cartridge is provided with means to control ribbon tension which takes the form of an O-ring driven by the supply spool which is trained around a drag post. When ribbon is to be drawn from the supply spool as by ribbon feed mechanism operative incident to a print action, the rotation of the supply spool is resisted by the drag or friction between the O-ring and the post. The drag force to be overcome to rotate the supply spool is low and does not vary significantly from full to empty supply spool. The resilience of the O-ring also stores energy which acts oppositely on the supply spool when the force to draw off ribbon is removed.