Sheet feeding and separating device for image forming equipment

Details Sheet feeding and separating device for image forming equipment Sheet feeding and separating device for image forming equipment

1991-10-10

1993-06-15

Olszewski, Robert P.

Sheet feeding or delivering

Feeding

Separators

271 34, B65H 318

Patent

active

052191540

ABSTRACT:
A sheet feeding and separating device incorporated in image forming equipment for feeding sheets one by one from a sheet stack while preventing two or more sheets from being fed together as far as possible and, when a plurality of sheets are accidentally fed together, surely separating one of them from the others. A pick-up member is implemented as an endless dielectric belt. An AC power source forms a charge pattern on the belt via an electrode. As a result, the belt retains a sheet by attraction and transports it due to the Maxwell stress generated in the sheet. When a plurality of sheets are fed together, an arresting member which faces the belt separates one of them from the others. Alternatively, a charge pattern may be formed on the surface of the arresting member.

REFERENCES:
patent: 3726520 (1973-04-01), Doi
patent: 4397455 (1983-08-01), Hickey
patent: 4526357 (1985-07-01), Kuehnle et al.
patent: 4674734 (1987-06-01), Ibuchi
patent: 4864461 (1989-09-01), Kasahara
patent: 4960273 (1990-10-01), Frystak et al.
patent: 5121170 (1992-06-01), Bonnai et al.

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