Sheet feed mechanism

Details Sheet feed mechanism Sheet feed mechanism

1989-06-06

1991-01-08

Schacher, Richard A.

Sheet feeding or delivering

Feeding

Separators

271121, B65H 306

Patent

active

049829424

ABSTRACT:
A sheet feed mechanism for feeding sheets one at a time, comprising a hopper loaded with a stack of sheets, a feed roller disposed near the outlet of the hopper, and a resilient tongue held in resilient contact with the central section of the feed roller. The central section of the feed roller is provided with an alternate circumferential arrangement of low friction portions and high friction portions. The friction coefficients between the sheet and the low friction portions is smaller than that between the sheet and the tongue, and the friction coefficient between the sheet and the high friction portions is greater than that between the sheet and the tongue.

REFERENCES:
patent: 1986800 (1935-01-01), Elliott
patent: 2705636 (1955-04-01), Bombard
patent: 3563537 (1971-02-01), Thut
patent: 4529187 (1985-07-01), Einem
patent: 4560154 (1985-12-01), Nogi
patent: 4638987 (1987-01-01), Sakurai
patent: 4674737 (1987-06-01), Murayoshi
"Low Cost Bottom Feeder with Flexible Retard", Robb et al., Xerox Disclosure Journal, vol. 8, No. 3, May/Jun. 1983, pp. 197-198.

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