Screen for separating and classifying particulate material and m

Details Screen for separating and classifying particulate material and m Screen for separating and classifying particulate material and m

1985-02-11

1986-07-15

Thomas, Alexander S.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

428131, 428134, 428137, B32B 310, B32B 324

Patent

active

046006222

ABSTRACT:
A screen for separating and classifying smaller particles from larger particles of a particulate substance wherein the screen is of a planar configuration and made from a slab of synthetic material. The screen includes a plurality of spaced perforations formed by cutting the slab with a pressurized stream of fluid, which method of forming produces perforations of highly uniform configuration and dimensions, particularly when the slab is a composite comprising plural layers of different synthetic materials. The perforations are configured to compensate for foreshortening of their top openings and accelerated wear tendencies during use of the screen in an inclined disposition.

REFERENCES:
patent: 3843476 (1974-10-01), Kramer
patent: 3857751 (1974-12-01), Jacobs

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