Glass manufacturing – Processes – Reshaping or surface deformation of glass preform
Patent
1986-12-10
1987-09-29
Kellogg, Arthur
Glass manufacturing
Processes
Reshaping or surface deformation of glass preform
65106, 65275, 65323, C03B 2326
Patent
active
046966927
ABSTRACT:
A multi-part mold assembly molds glass lenses. A cylindrical sleeve between the top and bottom molds has three cut-outs forming three alignment pads on both ends of the sleeve. These pads are preferably equally spaced around the circumference of the sleeve to constrain the top and bottom molds against rotation about X and Y axes which are orthogonal to the direction of closing of the mold. The alignment pads set the closed vertical positions of the molds. A torus on the bottom mold contacts a tapered opening in a removable sleeve insert to position a glass preform which is held by the insert. A torus on the top mold and a torus on the bottom mold bear against a cylindrical inner surface of the sleeve to precisely align the molds in the X and Y directions.
REFERENCES:
patent: 3390974 (1968-07-01), Parsons et al.
patent: 4481023 (1984-11-01), Marechal et al.
patent: 4629489 (1986-12-01), Hirota et al.
Corning Glass Works
Kellogg Arthur
Kurtz R. E.
Turner B. R.
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