Precision blocking of lens blanks

Details Precision blocking of lens blanks Precision blocking of lens blanks

1977-01-31

1979-02-06

Husar, Francis S.

Static molds

Uniting preform with molding material

33174A, 51277, 269 13, 269228, 356127, B22D 1900, B23Q 1700, B25B 124, G01B 900

Patent

active

041380851

ABSTRACT:
Method and apparatus for the precision blocking of lens blanks using a holder to de-center the blank and fix its optical axis. The holder is then used to position the blank with respect to a blocker by which an alloy hub or "block" is removably affixed to the blank so that it can be properly gripped for conversion into a finished lens product.

REFERENCES:
patent: 2146599 (1939-02-01), Smith
patent: 2585916 (1952-02-01), Coleman
patent: 2643557 (1953-06-01), Grove
patent: 2755553 (1956-07-01), Vaughn
patent: 3289311 (1966-12-01), Wolga
patent: 3431688 (1969-03-01), Rudd et al.
patent: 3451177 (1969-06-01), Buckminster
patent: 3589079 (1971-06-01), Beasley
patent: 3807095 (1974-04-01), Harding
patent: 3872760 (1975-03-01), Desnoyers

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