Manufacture of spherical balls
AssigneeTruth Incorporated
InventorsJean Dewitte, Pierre Aymard
Life of this patent
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Abstract
A process of forming glass balls by treatment of particulate vitreous material and a second material comprising carbon material and a carbonated salt. The process is carried out at a temperature, for the particular particulate vitreous material, which corresponds to a viscosity of from about 10.sup.6 to about 10.sup.3.5 poises with mixing and agitation. The apparatus includes a furnace having a tube (4) adapted to rotate about an horizontal or inclined axis, delivery means (10, 12, 14) to the tube for the materials to be treated, and heating means (8, 20) for heating the tube and the bed of material from both an external and internal location.
Claims11
Process of making balls from particulate vitreous material comprising:
- (a) mixing carbon in a free state and a substantial portion of a carbonated salt, said carbonated salt capable of decomposing under heat in the presence of carbon at a temperature, for said particulate vitreous material, corresponding to a viscosity of from about 10.sup.6 to about 10.sup.3.5 poises, and
- (b) both mixing and agitating both said particulate vitreous material and mixture of (a) at said temperature whereby said particulate vitreous material takes a spherical shape by action of surface tension.
Dependencies are inferred from the claim text.