Lens block with preform

Details Lens block with preform Lens block with preform

1975-06-30

1976-12-14

Whitehead, Harold D.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51277, B24B 1300

Patent

active

039967018

ABSTRACT:
A lens block having locating bosses for fixturing to lens-surfacing equipment and an interconnected oppositely disposed lens holding portion all cast of a eutectic blocking medium. The blocking medium is cast over and through an apertured preform of rigid, relatively high melting temperature material functioning as a heat sink and material filler.

REFERENCES:
patent: 3118225 (1964-01-01), McAndrews
patent: 3383808 (1968-05-01), Deshayes
patent: 3512310 (1970-05-01), Rudd

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