Lens surfacing adaptor

Details Lens surfacing adaptor Lens surfacing adaptor

1977-03-21

1978-04-25

Whitehead, Harold D.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

74813R, B24B 1300

Patent

active

040855538

ABSTRACT:
Ophthalmic lens surfacing with preformed tools (laps) requires the traditional blocking and pressing of a lens against the tool with force applied to the block. Lens blocks being thereby geometrically decentered in many of larger diameter lenses causing force applied to the block to be unevenly distributed over the lens-tool surfacing interface. This being detrimental to final lens surface shape and finish is avoided according to the present invention by the provision of a universally adjustable lens block adaptor designed to receive and distribute the surfacing pressure uniformly over the lens-tool interface.

REFERENCES:
patent: 1202013 (1916-10-01), Ainsley
patent: 1404828 (1922-01-01), Baum
patent: 2748548 (1956-06-01), Hilsinger
patent: 3177740 (1965-04-01), Firestone
patent: 3460928 (1969-08-01), Casko
patent: 3846912 (1974-11-01), Newbould

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