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. 24, 2014
Filed:
Oct. 25, 2011
Wayne O. Duescher, Roseville, MN (US);
Wayne O. Duescher, Roseville, MN (US);
Other;
Abstract
The rotary platens used here for high speed lapping are light in weight and low in mass inertia to allow fast acceleration and deceleration of the platens. The use of cast aluminum materials that are adhesively bonded together provides very rigid platens that have precision-flat surfaces that are dimensionally stable over long periods of time. Use of hardened spherical bead coatings on the surfaces of the platens provides wear-resistant coatings that are easy to apply and to maintain. The platens are constructed using ribs that provide very substantial stiffness and yet are light in weight which allows relatively small motors to be used to drive the platens. Platens are also constructed where the platen mass center is offset a very small distance from the center of rotation of the spherical-action bearings that support the platens to prevent dynamic distortion of the platen abrasive surface due to platen out-of-balance forces.