Cavity forming in plastic body

Details Cavity forming in plastic body Cavity forming in plastic body

B - Operations, Transporting

24

B

B24B 13/00 (2006.01) B24B 41/04 (2006.01)

Patent

CA 2066334

ABSTRACT OF THE DISCLOSURE An apparatus and method for forming a cavity in a rigid, organic plastic body comprises an abrading tool mounted on a carrier, and means for driving the tool while it is moved through an arc. In a preferred embodiment, the organic plastic body is an ophthalmic lens blank, and the cavity has the size and shape of a segment for a multifocal lens.

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