Browse Prior Art Database

RUBBER-COATED IDLER ROLLS

IP.com Disclosure Number: IPCOM000024423D
Original Publication Date: 1980-Aug-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 1 page(s) / 42K

Publishing Venue

Xerox Disclosure Journal

Abstract

This disclosure relates to paper sheet transports wherein sheets are transported by a plurality of sets of pinch roll pairs disposed along the sheet transport path. It is common practice to construct each roll pair by providing a metal or hard plastic roll for engagment with a high friction roll such as a rubber roll. When the lead edge of a sheet being transported contacts the metal roll first, there may be a delay before the lead edge is directed into the pinch since the lead edge may slip on the metal roll and not be directed into the pinch. The upstream rolls during this delay overdrive the sheet and cause buckling thereof.

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KEROX DISCLOSURE JOURNAL

RUBBER-COATED IDLER ROLLS Proposed Ronald R. Mayer Classification

                               U.S. C1. 271/264 Norman W. Biller Int. C1. B65h 5/00

This disclosure relates to paper sheet transports wherein sheets are transported by a plurality of sets of pinch roll pairs disposed along the sheet transport path. It is common practice to construct each roll pair by providing a metal or hard plastic roll for engagment with a high friction roll such as a rubber roll. When the lead edge of a sheet being transported contacts the metal roll first, there may be a delay before the lead edge is directed into the pinch since the lead edge may slip on the metal roll and not be directed into the pinch. The upstream rolls during this delay overdrive the sheet and cause buckling thereof.

By providing a high friction surface such as rubber on both rolls of each roll pair, the lead edge of each sheet is rapidly led into the roll pinch and fed therethrough, eliminating the overfeeding problem of normal feed roll pairs.

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Volume 5 Number 4 July/August 1980 391

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