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:
Oct. 25, 1994
Filed:
Mar. 23, 1992
Applicant:
Inventors:
Lester M Aseere, Woodbury, MN (US);
Gerald J Niles, St. Paul, MN (US);
Robert L Hanson, East Bethel, MN (US);
Marvin J Niezgocki, Maplewood, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; B01D / ; B01D / ;
U.S. Cl.
CPC ...
360 85 ; 360 84 ; 36013024 ; 553856 ; 55400 ;
Abstract
The present invention concerns a filter system for a helical scanner drum of the type having a drum cover provided with an air vent. The filter system includes a replaceable air filter element for entrapping airborne particles when air is drawn through the filter element and means for removably securing the filter element to the drum cover such that the filter element covers the air vent.