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US Patent: 2,663,978
Lapper for carbide tipped tools
Karl L. Lindmark - Loves Park, IL

USPTO Classifications:

Tool Categories:
metalworking machines : grinders : lapping machines
metalworking machines : grinders : tool grinders

Fenlind Engineering Co. - Loves Park, IL

Fenlind Engineering Co. - Rockford, IL


Patent Dates:
Applied: Nov. 03, 1952
Granted: Dec. 29, 1953

Patent Pictures:
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"Vintage Machinery" entry for Fenlind Engineering Co.; Rock Mill, Inc.
This lapping machine was also patented as British patent {GB772,246}, and was subsequently improved in patent 2,751,723.

"The principal object is to provide a machine incorporating a wheel of medium-large diameter having a wide flat rim with a smooth, true periphery for an endless belt of abrasive material that is kept evenly tensioned and running true while drives by means of a smaller motor-driven pulley, the wheel and belt thereby cooperating to provide an endless yielding precision lapping surface to lap or polish on the arcuate contour of the wheel to obtain a micro-finish on the tip of a cemented carbide tool bit accurately to a predetermined angle determined by the setting of a horizontal tool support at a predetermined elevation with respect to the working face of the wheel..."

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