Glass manufacturing – Processes – Self-supporting particle making
Patent
1986-12-16
1988-02-23
Lindsay, Robert L.
Glass manufacturing
Processes
Self-supporting particle making
65 22, 65 61, 65142, C03B 1910
Patent
active
047268298
ABSTRACT:
A method for making uniform spherical shells. The present invention allows niform hollow spheres to be made by first making a void in a body of material. The material is heated so that the viscosity is sufficiently low so that the surface tension will transform the void into a bubble. The bubble is allowed to rise in the body until it is spherical. The excess material is removed from around the void to form a spherical shell with a uniform outside diameter.
REFERENCES:
patent: 2052100 (1936-08-01), McMaster
patent: 2201049 (1940-05-01), Moore
patent: 3116137 (1963-12-01), Vasilos et al.
patent: 3607171 (1971-09-01), Hirsch
patent: 4433461 (1984-02-01), Ishikawa et al.
Blake Rodger D.
Day Delbert E.
Gac Frank D.
Haggerty John S.
Gaetjens Paul D.
Hightower Judson R.
Lindsay Robert L.
The United States of America as represented by the Department of
Wyrick Milton D.
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