Browse Prior Art Database

Separator Restraint Paper Feed System

IP.com Disclosure Number: IPCOM000085167D
Original Publication Date: 1976-Mar-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Gibson, DK: AUTHOR

Abstract

In the separator/restraint paper feed system of Fig. 1, picker roller 10 operates to separate at least the top sheet of stack 11, and to feed this sheet along sheet path 12 to the nip formed by separator or feed roller 13 and restraint roller 14.

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Separator Restraint Paper Feed System

In the separator/restraint paper feed system of Fig. 1, picker roller 10 operates to separate at least the top sheet of stack 11, and to feed this sheet along sheet path 12 to the nip formed by separator or feed roller 13 and restraint roller 14.

When a single sheet is supplied to this nip, the separator roller 13 operates to feed this sheet to sheet path 15, overcoming the opposite force exerted by the restraint roller 14 on the underside of the sheet.

When multiple sheets are supplied to this nip, only the top sheet is fed to sheet path 15, as the restraint roller 14 operates to force all other sheets back toward stack 11. In the multiple sheet situation, it is advantageous that the restraint roll 14 be relatively soft, so as to "store" the sheets which have been misfed with the top sheet, and to maintain the desired force between the two rolls over their wear life. However, the wear rate of such a soft restraint roll is usually unacceptable.

Fig. 2 shows a restraint roll 14 having a soft foam-type core 16 and a thin- skin, low-wear outer sleeve 17 placed over core 16. Sleeve 17 is selected to provide the desired restraint coefficient of friction and wear property, whereas core 16 is selected to provide the desired roll deformation, i.e., nip area and sheet storage area.

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