Sheet-feeding apparatus with one-way clutch to avoid premature s

Details Sheet-feeding apparatus with one-way clutch to avoid premature s Sheet-feeding apparatus with one-way clutch to avoid premature s

1989-09-18

1991-03-12

Skaggs, H. Grant

Sheet feeding or delivering

Feeding

Separators

271164, B65H 306

Patent

active

049987143

ABSTRACT:
A sheet-feeding apparatus comprises sheet-feeding rollers for advancing sheets, one at a time, from a stack of sheet material. The sheet-feeding rollers are supported by a drive shaft which is mounted for movement toward and away from the sheet stack so that the feed rollers may be selectively displaced from the stack, for example, to effect sheet replenishment. A cam surface associated with a slidable stack support cooperates with a cam-follower associated with the roller shaft to effect displacement of the feed rollers from the stack during sliding movement of the stack support. A pair of one-way clutches and a rack and pinion arrangement cooperate to allow the sheet-feed rollers to rotate freely during initial contact with the top sheet in the stack, thereby avoiding premature feeding of such sheet during a stack reloading process.

REFERENCES:
patent: 4231566 (1980-11-01), Suzuki
patent: 4577850 (1986-03-01), Takeyama et al.
patent: 4799662 (1989-01-01), Sagara et al.

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