Filter medium layered between supporting layers

Details Filter medium layered between supporting layers Filter medium layered between supporting layers

1975-09-11

1977-03-08

Nozick, Bernard

Gas separation

With means for advancing clean portions of continuous or...

Indefinite or running length

55487, 55528, 55DIG35, 1281426, B01D 4618

Patent

active

040110672

ABSTRACT:
A new filter medium, which can remove a high percentage of fine particles from a gas stream while causing a relatively low pressure drop in the gas stream, comprises a base porous web, one or more lightweight non-self-supporting layers of microfibers collected and carried on the base porous web, and a top porous web. A new aerosol filter apparatus incorporates the new filter medium to provide economical consistent filtering of air in a home, office, or industrial environment. In this new filter apparatus, a web of the filter medium extends from a supply roll across a stream of the air being cleaned to a take-up roll; and the filter medium is advanced from the supply roll to the take-up roll to gradually provide a fresh length of filter medium in the air stream.

REFERENCES:
patent: 2835341 (1958-05-01), Parker, Jr.
patent: 3102014 (1963-08-01), Aitkenhead
patent: 3251475 (1966-05-01), Till et al.
patent: 3258900 (1966-07-01), Harms
patent: 3316904 (1967-05-01), Wall et al.
patent: 3460680 (1969-08-01), Domnick
patent: 3606740 (1971-09-01), Ballennie
patent: 3745748 (1973-07-01), Goldfield
Superfine Thermoplastic Fibers by Van Wente in Industrial & Engineering Chemistry, vol. 48, No. 8, dated Aug. 1956, pp. 1342-1346.

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