Sheet separator dam with inset friction element

Details Sheet separator dam with inset friction element Sheet separator dam with inset friction element

1997-08-28

1999-05-04

Milef, Boris

Sheet feeding or delivering

Feeding

Separators

271161, 271167, B65H 352

Patent

active

058994505

ABSTRACT:
A dam has a plurality of substantially parallel ribs with recesses therebetween. At least one of the recesses has a pad therein with its sheet engaging surface being interior of the sheet engaging surfaces of the ribs. The rib surfaces, which are engaged first by the sheets being fed, have a lower coefficient of friction with the sheets than the sheet engaging surface of the pad. If more than one sheet is fed from a stack to the dam, the sheets will strike the rib surfaces first and then the pad surface if not separated from each other by the rib surfaces. Since the pad surface has a coefficient of friction substantially equal to the sheet to sheet friction, this step function in friction helps to separate the top sheet from the next adjacent sheet.

REFERENCES:
patent: 748279 (1903-12-01), Hallberg
patent: 3126122 (1964-03-01), Sacre
patent: 3306491 (1967-02-01), Eisner et al.
patent: 3421754 (1969-01-01), Schaller et al.
patent: 3873084 (1975-03-01), Ito
patent: 3944214 (1976-03-01), Fallos et al.
patent: 4934684 (1990-06-01), Gysling
patent: 5052677 (1991-10-01), Shibata
patent: 5090679 (1992-02-01), Maekawa et al.
patent: 5163669 (1992-11-01), Hurd et al.
patent: 5277417 (1994-01-01), Moritake et al.
patent: 5409205 (1995-04-01), Macke et al.

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