Gas separation – Two or more separators – Plies or layers of different characteristics or orientation
Patent
1996-11-08
1998-09-01
Smith, Duane
Gas separation
Two or more separators
Plies or layers of different characteristics or orientation
55487, 55524, 55527, 55528, 210491, 2104931, 210506, 210509, 428182, 428184, B01D 4652
Patent
active
058005862
ABSTRACT:
A composite filter media includes a fibrous filtration layer of randomly oriented fibers and one or more pleatable stiffening layers which enable the composite filter media to be pleated and hold or retain its pleats. The pleatable stiffening layer(s) may enhance the dirt holding capacity of the composite filter media especially when positioned upstream of the fibrous filtration layer. The composite filter media may also include a flexible covering layer which functions to block the loss of fibers from the fibrous filtration layer. Preferably, the mean fiber diameter of the fibers in fibrous filtration layer increases and the density of the fibrous filtration layer decreases throughout the thickness of the fibrous filtration layer from one major surface to the other major surface of the fibrous filtration layer.
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Cusick Michael John
DePorter Craig Donald
Jackson Fred Lee
Kern Charles Francis
Johns Manville International Inc.
Smith Duane
Touslee Robert D.
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