Gas separation – With means securing or retaining separating media – Unit or cohesive sheet-like media in flow line or frame
Patent
1994-04-26
1996-02-20
Bushey, C. Scott
Gas separation
With means securing or retaining separating media
Unit or cohesive sheet-like media in flow line or frame
55511, 55527, 55DIG39, 55DIG45, B01D 4600
Patent
active
054925517
ABSTRACT:
The present invention is an air filter assembly which includes a frame having a filter mounted therein. The filter is constructed of woven microfilament strands having a cross-sectional height of at most 30 microns, the strands being spaced apart by at most 20 microns. The filter medium is single-ply so as to be non-entraining. Each strand preferably has a smooth outer surface for repelling particles smaller than the size of the openings in the filter. The frame may laterally adjustable, if desired. In an alternative embodiment, the filter includes a single-ply sheet of a filtering material having openings cut therein. The filtering material preferably has a smooth outer surface facing the air-flow for preventing the particles from clogging the filter. The openings may be made in the filtering material by processes such as laser cutting, x-ray lithography, chemical etching, or by stretching a microporous sheet. The percentage of the filter surface area that is open to air flow is sufficient to enable air flow without the use of a mechanical blower.
REFERENCES:
patent: 570219 (1896-10-01), Fiechter
patent: 1056722 (1913-03-01), Adler
patent: 2478097 (1949-08-01), Glanzer
patent: 2551175 (1951-05-01), Smith
patent: 2615477 (1952-10-01), Crawley
patent: 3675402 (1972-07-01), Weed
patent: 4022596 (1977-05-01), Pedersen
patent: 4225642 (1980-09-01), Hirakawa
patent: 4728349 (1988-03-01), Oshitari
patent: 4801383 (1989-01-01), Hoffmann et al.
patent: 4824451 (1989-04-01), Vogt et al.
patent: 4902306 (1990-02-01), Burnett et al.
patent: 4904288 (1990-02-01), d'Augerean
patent: 5004487 (1991-04-01), Kowalczyk
patent: 5037455 (1991-08-01), Scheineson et al.
patent: 5312467 (1994-05-01), Wolfe
Henry I. Smith et al., "X-ray Lithography, from 500 to 30 nm: X-ray Nanolithography", IBM J. Res. Develop. vol. 33, No. 3, May 1993, pp. 319-329.
D. Saulys et al., "Scanning Tunneling Microscopy Assisted Oxide Surface Etching", J. Appl. Phys. 69(3), Feb. 1, 1991, pp. 1707-1711.
Y. Mizutani et al., "Microporous Polypropylene Sheets", Ind. Eng. Chem. Res., vol. 32, No. 1, 1993, pp. 221-227.
Tetko Inc.--Screening and Filtration Media Product Catalog, pp. 2 and 23.
Bushey C. Scott
Klein David M.
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