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:
Nov. 30, 1999
Filed:
Mar. 31, 1999
Vincent C Adams, Buffalo, IL (US);
David L Poole, Libertyville, IL (US);
David A West, Streamwood, IL (US);
Davis S Zubriski, Addison, IL (US);
Daniel F Donato, Mundelein, IL (US);
James W Ensinger, Palatine, IL (US);
William J Hamman, Justice, IL (US);
Zebra Technologies Corporation, Vernon Hills, IL (US);
Abstract
A novel demand printer is used for printing on tickets, tags, pressure sensitive labels and other media. The printer has a spring wrap clutch assembly operatively associated with a media delivery structure for use with a rotating shaft to maintain a constant tension on a ribbon. The spring wrap clutch assembly includes a coiled spring having a leg extending away from one end of the coil, a collar having a bore therein for receiving the coiled spring with the leg extending away from the collar, the rotating shaft extending through the coiled spring and the collar is attachable to the rotating shaft, and a plurality of ramped teeth positioned around the rotating shaft. Each of the ramped teeth has a sloped surface and the leg of the coiled spring controllably engages the ramped teeth.