Apparatus for edging lenses

Details Apparatus for edging lenses Apparatus for edging lenses

1978-02-21

1979-12-04

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

5116587, B24B 914

Patent

active

041764986

ABSTRACT:
An apparatus for edging the periphery of an article, such as an ophthalmic lens to a predetermined outline or edge configuration, is characterized by a work holder for supporting and rotating a lens while moving an edge of the lens against a cylindrical grinding wheel. During grinding, the lens is engaged with only a portion of the grinding wheel, and to prevent a groove from being formed in the wheel successive lenses are automatically and periodically engaged with different portions of the wheel. In consequence, the wheel wears evenly, it retains a substantially cylindrical shape, all portions of its grinding surface are effectively used in grinding lenses, and the formation of a groove in its surface is prevented, whereby the wheel does not require retruing or reshaping and its useful life is significantly increased.

REFERENCES:
patent: 845687 (1907-02-01), Brown
patent: 3513598 (1970-05-01), Asselin et al.
patent: 3798844 (1974-03-01), Hannaman
patent: 3894361 (1975-07-01), Georgiadis et al.

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