Heat shield blocking and mounting disc for lens grinding

Details Heat shield blocking and mounting disc for lens grinding Heat shield blocking and mounting disc for lens grinding

1978-01-03

1980-09-09

Whitehead, Harold D.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51216LP, 51277, B24B 100

Patent

active

042210836

ABSTRACT:
A heat shield and blocking disc for use in lens grinding which comprises a carrier layer of flexible optical transparent plastic having transparent adhesive coatings on both sides thereof, one of which is adapted to stick to a plastic lens blank but to be stripped therefrom with a minimum of residue with the other adhesive compatible with the normal alloy used in blocking glass lens blanks, permitting a simpler blocking of plastic lenses and the use of the normal alloy, thereby reducing the cost of the process.

REFERENCES:
patent: 2607711 (1952-08-01), Hendricks
patent: 3197326 (1965-07-01), Webber
patent: 3404488 (1968-10-01), Cox
patent: 3490182 (1970-01-01), Lanman
patent: 3925271 (1975-12-01), Balinth
patent: 3962833 (1976-06-01), Johnson
patent: 3996701 (1976-12-01), Ramirez

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