Glass Bead Forming Method

Author:  J.J. Hammel; E.J. Cone
Source:  US Patent 4,002,446
Doc ID:  1977067
Year of Publication:  1977
Abstract:  
Spherical regularity of glass beads is improved by catching a falling stream of hot beads in a bath of liquid quenching medium having a relatively low heat transfer coefficient controlled by maintaining a relatively high viscosity.