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:
Jul. 04, 1989
Filed:
Feb. 08, 1988
Joseph T Wilson, III, Endicott, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A tractor for feeding perforated paper has an endless belt of flexible material having pins and teeth extending in opposite directions from said belt. The belt has more rigid sections corresponding to the locations of the teeth between flexible web sections. A pulley is provided which has curved sections and grooves for receiving the teeth of the belt. The curved sections comprise an arc with ends having points of tangency with planes of straight sections of the belt extending across the grooves. The curved sections may comprise a composite arc having end arc sections with points of tangency with the planes of the straight sections of the belt and a center arc section having points of tangency with the end arc sections. The curved sections may also be an arc which has a continuously increasing radius of curvature from the points of tangency with the planes of the straight sections of the belt to a center line between the grooves.