Browse Prior Art Database

Original Publication Date: 1986-Oct-31
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal


The ability to reliably transport paper and documents through xerographic devices is a key element of effective product functionality Paper and document transports have been accomplished by a number of different design concepts which include transports, belts and pinch rolls. Pinch rolls typically comprise a roller member which consists of a hub and an elastorneric top layer which is engaged under load with an idler roll consisting of a hard non-deformable metal or plastic. Typically the driven roll element is an intervgral part of the mounting shaft either having the elastomeric top layer molded to the hub milled into the shaft or on a separate hub which is mechanically locked in place on the shaft. As a result, these pinch roll assemblies require shaftdpinch roll parts that are unique to particular design or set of designs. The Figures illustrate the use of a lockable hemispheric element molded as a unit such that two of these elements may be locked together thereby producing a pinch roll In Figure 1, a thin elastomeric layer 10 and a thicker elastomeric layer 12 would be molded on the inside and outside respectively of the plastic hub of the hemispheric element. The inner thinner elastomeric layer would be shaped in such a way that when two elements are locked together a compression load is developed between the main shaft and the inner elastamer liner thereby resulting in a friction joint which will not