Gas separation: processes – Filtering – Plural separate media
Patent
1998-06-04
2000-07-25
Simmons, David A.
Gas separation: processes
Filtering
Plural separate media
96421, 96138, 55476, 55480, 55486, 55488, 55498, 55506, 55492, 55510, 55518, B01D 4600
Patent
active
060932376
ABSTRACT:
An air cleaner arrangement useful for cleaning air in ablative thermal imaging processes includes a housing and a removable and replaceable element assembly. The housing has an interior, an inlet conduit, and an outlet conduit. The element assembly includes first and second filter elements axially aligned and secured together in a stack configuration. The first filter element has a media pack for filtering particulate material. The second filter element has a media pack for filtering noxious gases, such as formaldehyde. In operation, a blower assembly directs airflow through the inlet conduit, into the first element interior, through the first element media pack, through the second element media pack, into the second element interior, and out through the housing outlet conduit. Methods for filtering and changing out of the element assembly are also described herein.
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Declaration of Scott Keller dated Oct. 21, 1998 with Exhibit A (The Assembly depicted being publicty disclosed in 1996).
Carey Todd G.
Ferris David G.
Keller Scott A.
Schneider Kirk A.
Donaldson & Company, Inc.
Hopkins Robert A.
Simmons David A.
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