Plastic film air table conveyor

Details Plastic film air table conveyor Plastic film air table conveyor

1987-09-21

1989-04-11

Schacher, Richard A.

Sheet feeding or delivering

Feeding

By means to convey sheet

271193, 271195, 271197, B65H 522

Patent

active

048199281

ABSTRACT:
A plastic film handling apparatus includes an air table formed by a box having a surface crossed by a conveyor, in the form of endless belts surrounding the box, in which a multiplicity of individual air chambers is provided. Each of the individual chambers is selectively pressurized (negative or positive) by selective coupling of the chambers with a blower through a manifold chamber. Openings through the surface couple each chamber with an overlying plastic film. A second blower and manifold chamber, selectively coupled with the individual chambers, is provided so that at least two air pressure levels, different from atmospheric and one another, can be generated. The air manifold chambers are isolated from one another adjoining each of the individual air chambers and are selectively coupled with individual chambers by the removable gates therebetween or by the setting of other conventional settable air couplings between the individual chambers and each manifold chamber. A static bar is provided to apply a static electric charge to the plastic film to attract the film to the conveyor and hold the film in place in the absence of suction.

REFERENCES:
patent: 3123354 (1964-03-01), Ungerer
patent: 3477558 (1969-11-01), Fleischauer
patent: 3805683 (1974-04-01), Hook
patent: 4275977 (1981-06-01), Joice
patent: 4526357 (1985-07-01), Kuehnle

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