The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 25, 2000
Filed:
Jun. 04, 1998
Scott A Keller, Savage, MN (US);
Kirk A Schneider, Eden Prairie, MN (US);
Todd G Carey, Farmington, MN (US);
David G Ferris, Mahtomedi, MN (US);
Donaldson Company, Inc., Minneapolis, MN (US);
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.