Sheet feed device for use in a printer or the like

Details Sheet feed device for use in a printer or the like Sheet feed device for use in a printer or the like

1990-01-22

1991-01-22

Bollinger, David H.

Sheet feeding or delivering

Feeding

Separators

271 10, 271 4, 271272, 400625, 400629, 400636, 400637, B65H 306

Patent

active

049865250

ABSTRACT:
A sheet feed device for feeding a sheet-like material includes a feed roller disposed upstream with respect to a sheet feeding direction for feeding the sheet-like material and main and auxiliary roller pair disposed downstream with respect thereto for further feeding the sheet-like material fed out by the feed roller. At the start of feeding the sheet-like material, both the feed roller and the main and auxiliary roller pair are rotated, and after the sheet-like material is fed a certain distance and grasped by the main and auxiliary roller pair, only the main and auxiliary roller pair is rotated, whereby a load imposed to a motor for rotating both the feed roller and main and auxiliary roller pair is lessened. According to another aspect of the invention, the sheet-like material is frictionally fed by the main and auxiliary roller pair, but in case where the peripheral speed of the auxiliary roller becomes slower than that of the main roller due to slippage caused by the sheet-like material interposed therebetween, the auxiliary roller is forcibly rotated at the peripheral speed substantially equal to that of the main roller, whereby the sheet-like material is prevented from being curved, jammed or wrinkled during the sheet feeding process.

REFERENCES:
patent: 4789259 (1988-12-01), Katayanagi

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