Pneumatic vacuum cup for paper acquisition

Details Pneumatic vacuum cup for paper acquisition Pneumatic vacuum cup for paper acquisition

1993-02-12

1993-11-02

Olszewski, Robert P.

Sheet feeding or delivering

Special articles

Envelope

271 90, 271107, B65H 500

Patent

active

052578054

ABSTRACT:
Apparatus for separating sheets of material. The apparatus includes: a device for supporting adjacent sheets of material; a vacuum cup for acquiring one of the adjacent sheets of material, the vacuum cup having a circumferential inner wall with an opening adjacent the one sheet of material and a circumferential outer wall coaxial with and surrounding but spaced from the inner wall, wherein the inner wall closes the end of the outer wall adjacent the one sheet of material, and wherein the outer wall includes a flexible, corrugated section enabling the outer wall to collapse in the axial direction; and a device to create separate vacuums within the inner wall and the outer wall, wherein the vacuum within the inner wall causes the vacuum cup to acquire the one material sheet and the vacuum within the outer wall causes the cup to collapse and move away from the supporting device to thereby separate the one material sheet from its adjacent sheets.

REFERENCES:
patent: 2745665 (1956-05-01), Labombarde
patent: 4351518 (1982-09-01), Stievenart
patent: 4717138 (1988-01-01), Watkiss
patent: 4728093 (1988-03-01), Eberle

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