US PATENT SUBCLASS 451 / 256
.~.~.~.~.~ Lens abrader

Current as of: June, 1999
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451 /   HD   ABRADING

64  DF  MACHINE {12}
177  DF  .~ Rotary tool {3}
178  DF  .~.~ Rotary cylinder {11}
242  DF  .~.~.~ Work rotating {5}
246  DF  .~.~.~.~ Rotary work holder {9}
256.~.~.~.~.~ Lens abrader

DEFINITION

Classification: 451/256

Lens abrader:

(under subclass 246) Abrading machine specifically disclosed for grinding an optical device made from glass, plastic, or other transparent material.

(1) Note. This subclass takes a device for lens surface polishing as well as one for lens generating.

SEE OR SEARCH THIS CLASS, SUBCLASS:

42, for a method of grinding a lens.

240, 255, 277, and 323, for other lens grinders.