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. 22, 1983
Filed:
Dec. 09, 1981
George P McInerny, Andalusia, PA (US);
Technitrol, Inc., Philadelphia, PA (US);
Abstract
A document separation device for separating documents in a stack employs counter-rotating drum and friction belt members to strip away and hold back more than a single document trying to pass between them. The structure employs a pair of friction drums and a free-wheeling pulley between them of slightly smaller diameter but on the same axis. Counter-rotating friction stripper belt is supported between two pulleys one of which is driven and is wrapped over the pulley between the friction drum members. A third rotatable pulley between the two supporting the friction belt is located opposite the free-wheeling pulley and has flanges which bear upon the friction drum surfaces such that the friction belt will normally not contact the third pulley when the friction belt is in direct contact with the idler between the friction drums. The friction belt is slightly slack. When a document passes between the belt and the friction drums, it moves the third pulley against the action of the tensioning means and causes the friction belt which is stretchable and resilient to become more taut. If the document is stiff it becomes further extended and the tautness is increased still further by the third member pressing against the stretchable friction belt on the opposite side of the pulley to provide two points of stretching.