Gas separation – Two or more separators – Plies or layers of different characteristics or orientation
Patent
1993-08-25
1994-04-26
Hart, Charles
Gas separation
Two or more separators
Plies or layers of different characteristics or orientation
55498, 55521, 55524, 55528, 2104931, 2104932, B01D 3916, B01D 4602
Patent
active
053063210
ABSTRACT:
The present invention is directed at a filter and method for making the filter. The filter has a first filter layer of high efficiency melt blown filter medium having an efficiency of pre-HEPA to HEPA, and a second filter layer of cellulose support medium by which the first filter layer is supported. The filter is pleated, and a plurality of dimples for separating a plurality of pleats can be fabricated on the pleat tips.
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Hart Charles
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