C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
49/41
C03B 23/26 (2006.01) C03B 11/08 (2006.01)
Patent
CA 1314147
ABSTRACT OF THE DISCLOSURE 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.
550761
Corning Incorporated
Gowling Lafleur Henderson Llp
LandOfFree
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