Browse Prior Art Database

Separator Pre Spin Mechanism

IP.com Disclosure Number: IPCOM000088567D
Original Publication Date: 1977-Jul-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Bielling, RA: AUTHOR [+5]

Abstract

When stationary rollers contact paper which is to be fed, undesirable friction feeding or ink smears often occur due to roller slippage.

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Separator Pre Spin Mechanism

When stationary rollers contact paper which is to be fed, undesirable friction feeding or ink smears often occur due to roller slippage.

Illustrated is a wave generator, having rotatable feed rollers, which alleviates these problems by producing a roller pre-spin. Pad 1 on pivoting crank 2 is biased by spring 3 against separator rollers 4. As wheel 5 is rotated counterclockwise, the friction pad spins the rollers. Since the pad is very close to the paper stack 6, the rollers are still rotating when they contact the paper. The force needed to start the rollers is therefore not supplied by the paper. This produces pure rolling of the rollers on the paper and allows shingling, as described in U.S. Patent 3,008,709.

As an alternative, crank 2 could be limited in movement such that it only spins the rollers during their initial contact with the paper. This is the condition when friction feeding is most likely to happen. A partial friction feed may be desirable to add velocity to the paper.

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