Original Publication Date: 1985-Jun-01
Included in the Prior Art Database: 2005-Feb-18
A cup-shaped burnishing tool, which is used to burnish the oxide surface of flexible magnetic recording disks, is edge-sharpened by the use of an oscillating arm which holds a tool housing. The tool housing includes one or more round openings whose perimeter is defined by rollers. The rollers engage the outside surface of the cup-shaped tool, and allow the tool to freely rotate, as the oscillating arm moves the tool housing back and forth in an arc over a rotating copper lapping disk. A diamond compound is applied to the lapping disk, and the tool is weight-biased into the disk. Fig. 1 is a top view of lapping disk 10 and oscillating arm 11. In this arrangement, disk 10 rotates in a horizontal plane, and tool housing 12 is integral with arm 11.