Filters

Details Filters Filters

1976-12-21

1979-08-14

Nozick, Bernard

Gas separation

Flexible or collapsible bag type

Seaming, reinforcing or bag structure

55291, 55302, 55473, 55487, 55498, 55524, 55528, B01D 4600

Patent

active

041644000

ABSTRACT:
There is provided a filter wherein the filtering means has a non-woven needled textile filter fabric with an overall bulk density of at least 6 pounds per cubic foot and bulk density gradient such that the bulk density at the face surface of the fabric is greater than the bulk density at the back surface of the fabric. In conjunction with that bulk density gradient is a filtering gradient such that the fineness of filtration at the face surface is greater than the fineness of filtration at the back surface. The filter may be in any convenient form, such as the bag of an air conveyor filter or a vacuum cleaner filter.

REFERENCES:
patent: 1530674 (1925-03-01), Jackson
patent: 2784132 (1957-03-01), Maisel
patent: 2910763 (1959-11-01), Lauterbach
patent: 2933154 (1960-04-01), Lauterback
patent: 2980204 (1961-04-01), Jordan
patent: 3107989 (1963-10-01), Fesco
patent: 3759393 (1973-09-01), Tate et al.
patent: 3871850 (1975-03-01), Lenane
patent: 4093437 (1978-06-01), Ichihara et al.

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