Apparatus to demonstrate air flow through permeable sheet materi

Details Apparatus to demonstrate air flow through permeable sheet materi Apparatus to demonstrate air flow through permeable sheet materi

1975-07-24

1976-08-10

Skogquist, Harland S.

35 10, G09B 2500

Patent

active

039733351

ABSTRACT:
An apparatus to demonstrate air flow through sheet material such as carpeting and padding to provide a qualitative, visual test of the permeability of the material. A transparent, closed container is connected with a vacuum pump to pull air thereinto from an opening at the bottom of the container which is traversed and closed by a sample of the sheet material to be tested. Thus, air flows into the container by passing through the sheet material. Lightweight objects within the container are agitated by air movement and the manner and intensity with which they are bounced and tossed within the container provides for a spectacular, qualitative demonstration of the permeability of the material. Also, a simple comparison of one material with another is possible with the apparatus.

REFERENCES:
patent: 2228371 (1941-01-01), Shaw
patent: 2613454 (1952-10-01), White
patent: 2897604 (1959-08-01), Scott
patent: 2930147 (1960-03-01), Martinec

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