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:
Aug. 30, 1983
Filed:
Feb. 26, 1981
Abstract
The typewriter has a drive mechanism including a vibrating mechanism and a feeding mechanism for a correction ribbon. The vibrating mechanism has a pair of ribbon vibrators, a cam follower provided to one of the vibrators, an eccentric cam designed to make one complete revolution for each printing operation in response to depression of associated key, and a spring member for resiliently biasing the cam follower toward the peripheral surface of the eccentric cam. The feeding mechanism has a pair of spindles for carrying ribbon spools, a ratchet wheel mounted on one of the spindles and a feed lever connected to the other vibrator. Upon depression of a correction key for setting the ribbon vibrators to be actuatable, followed by depression of an alphanumeric key, the ribbon vibrators are actuated by rotion of the eccentric cam so that the correction ribbon is raised from its inoperative position to its operative position. When the correction ribbon is lowered from its operative position to its inoperative position, the feed lever is actuated in timing with the return stroke of the ribbon vibrators for feeding the correction ribbon a predetermined length.