Preformed ophthalmic lens base block

Details Preformed ophthalmic lens base block Preformed ophthalmic lens base block

1996-09-13

1999-06-29

Rose, Robert A.

Abrading

Accessory

Work-mounting device

451390, B24B 4106

Patent

active

059160179

ABSTRACT:
The present invention provides novel preformed base blocks that may be used with thermoplastic ophthalmic lens blocking compositions. The preformed base block has a rear portion that is sized and adapted to fit the chuck of a lens processing machine and a front portion that has a negatively tapered peripheral edge. The front portion is adapted to mechanically retain the thermoplastic blocking composition to form a lens block against a lens blank.

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"Step One : Your First Step in Surface Preparation", Lab Talk, Jan./Feb. 1994, pp. 6,8,18.
Gerber Optical, Inc. product literature, copyright Nov. 17, 1993.

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