Gas separation – Two or more separators – Plies or layers of different characteristics or orientation
Patent
1997-07-25
1999-11-23
Chiesa, Richard L.
Gas separation
Two or more separators
Plies or layers of different characteristics or orientation
55493, 55497, 55501, 55521, 55528, 55DIG31, 55DIG35, 96 17, 96 55, 96233, B01D 2956
Patent
active
059893036
ABSTRACT:
A filter apparatus for use in a forced air ventilation system, the filter apparatus having a first fan folded sheet of a washable first type of filter material, a second fan folded sheet of a second type of filter material, and fanfolds of the first and second fan folded sheets are substantially equally shaped and folded together such that the fanfolds of the first and second fan folded sheets are interdigitated to form a filter material assembly. The first type of filter material is preferably an electrostatically self-charging washable material such as woven polypropylene and the second type of filter material is preferably disposable and contains activated charcoal. The filter material assembly may be removably disposed in a rectangular filter frame for mounting the filter material assembly in the forced air system. The filter frame has at least one crank shaft rotatably deposed between two opposed side walls which are between an open front end and an open back end of the frame. The crank shaft has cranks that are engageable with and substantially conforming to the fanfolds of the filter material assembly.
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Chiesa Richard L.
Rosen Steven J.
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