Glass-ceramic support for fusing and sagging ophthmalmic multifo

Details Glass-ceramic support for fusing and sagging ophthmalmic multifo Glass-ceramic support for fusing and sagging ophthmalmic multifo

1988-08-05

1989-11-28

Lindsay, Robert L.

Glass manufacturing

Processes

Fusion bonding of glass to a formed part

65 254, 65 26, 6537413, 29559, 249115, 264 23, 264 25, 427133, 427135, C03B 1108

Patent

active

048835250

ABSTRACT:
There is disclosed a low expansion glass-ceramic substrate for supporting a glass multifocal lens assembly during a fusing or sagging heat treatment. The substrate has baked on its supporting surface a paint composed essentially of titania, alumina and a mica.

REFERENCES:
patent: 3141756 (1964-07-01), Giffen
patent: 3244497 (1966-04-01), Copeland
patent: 3266107 (1966-08-01), Groteke
patent: 3341315 (1967-09-01), Patschorke

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