Plastic lens cutter and edger

Details Plastic lens cutter and edger Plastic lens cutter and edger

1978-07-21

1980-03-04

Weidenfeld, Gil

Gear cutting, milling, or planing

Milling

With regulation of operation by templet, card, or other...

B23C 118

Patent

active

041915011

ABSTRACT:
The machine is designed for the specific purpose of cutting plastic lenses such as acrylic and polycarbonate types. The machine itself includes a table carrying a lens cutter and lens pattern engaging cam in coaxial alignment. A head carrying a plastic lens to be cut and lens pattern in coaxial alignment is coupled to the table for movement towards and away from the axis of the lens cutter and lens pattern engaging cam. The lens cutter engages the periphery of the lens to be cut. The lens pattern defines the finished contour of the lens and engages the cam after a slight radial cut is initially made into the periphery of the lens. Subsequent rotation of the lens and pattern simultaneously results in a cutting of the lens out of the lens material by the lens cutter as opposed to grinding away the periphery of the lens. The machine also incorporates controls for automatically effecting a beveling operation on the lens after the rough cut has been completed.

REFERENCES:
patent: 2333064 (1943-10-01), Williams et al.
patent: 3828648 (1974-08-01), Geula

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