Blocking apparatus for fixing a metal block to the finished face

Details Blocking apparatus for fixing a metal block to the finished face Blocking apparatus for fixing a metal block to the finished face

1980-09-26

1983-02-08

Hampilos, Gus T.

Metal founding

Means to shape metallic material

Including means to hold or position preformed product part...

164344, 425808, B22D 1900

Patent

active

043723683

ABSTRACT:
This blocking apparatus for fixing a metal block to the finished face of a semi-finished spectacle lens blank by casting a low-melting metal into a mold contacting the finished face of the blank comprises a mold made of two sections, namely a fixed section and a movable section, the former carrying the annular seat for the lens blank and the latter carrying relief elements, these two mold sections being in mutual rotary contact through part-spherical surfaces constituting a ball-joint centered to the axis of the annular seat. Control means are operatively connected to a shaft rigid with the movable mold portion for orienting same and cause same to be lipped about the center of the ball-joint in order to impart the prescribed prism value and the prescribed prism axis orientation, and align the relief elements with the prescribed cylinder axis.

REFERENCES:
patent: 3049766 (1962-08-01), Buckminster
patent: 3221378 (1965-12-01), Faas et al.
patent: 3383808 (1968-05-01), Deshayes et al.
patent: 3507076 (1970-04-01), Rudd et al.
patent: 3563301 (1971-02-01), McCall et al.
patent: 3804153 (1974-04-01), Tagnon
patent: 3951203 (1976-04-01), Prumer

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