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:
Jun. 30, 1981
Filed:
Aug. 28, 1979
Michael L Teetzel, Columbus Twp., Anoka County, MN (US);
Ralph E James, White Bear Lake, MN (US);
Minnesota Mining and Manufacturing Company, Saint Paul, MN (US);
Abstract
An improved abrasive flap wheel is comprised of a highly compacted annulus of like-oriented, radially disposed, interleaved coated abrasive flaps and resilient, lofty, non-woven flaps adhesively fastened together at adjacent inner ends. The abrasive flap wheel is made by compressing a stack of juxtaposed flaps of a desired distribution to form a block substantially the same length as the inner perimeter of the annulus, fastening together the ends of the flaps on the surface of the block which will become the inner surface of the annulus and forming the block into an annulus with the free ends of the flaps directed radially outward. The inner ends of the flaps are adhesively fastened together in the process. The degree of annulus compaction is reflected by the compressed thickness of the ends of the non-woven flaps at the inner perimeter which is less than approximately 35% as thick as their uncompressed outer ends. The compacted flap wheel of the invention has a much higher abrasive grain efficiency than conventional less compacted flap wheels.