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:
Oct. 16, 1992
Cathleen M Arsenault, St. Paul, MN (US);
Eric J Donaldson, St. Paul, MN (US);
John W Swanson, Maplewood, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
A lifter for cleaning a flexible magnetic recording disc. The lifter forces a fabric liner on the inner surface of a cartridge toward the rotating disc. The perimeter of the lifter is configured so that the force profile of the lifter taken across the width of its leading edge is not characterized by sudden changes in force across its width. The lifter can include a cut-out region within the area of the lifter, the region being configured to increase the force applied by the lifter along the inner tracks of the magnetic recording disc. The lifter does not significantly increase the torque required to drive the disc. The invention also includes a method of cleaning a disc using the lifter described above.