B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
18/106, 18/1111
B29D 11/00 (2006.01) B29C 39/02 (2006.01) B29C 43/02 (2006.01) B29D 11/02 (2006.01)
Patent
CA 1322091
ABSTRACT OF THE DISCLOSURE A method and apparatus for molding articles such as ophthalmic devices to provide high surface smoothness without the formation of flask anywhere on the molded articles. A predetermined quantity of moldable material is arranged between spaced apart molding surfaces, between which as an outer boundary, a meniscus is formed. The configuration of the meniscus is controlled as by moving the molding surfaces toward each other to produce convex rounding of the moldable material forming the meniscus. When thermo-curring material is used, heating of the molds is controlled to accelerate the polymerization of the moldable material. The molding surfaces are moved when the moldable material attains a predetermined gel state.
580572
Brown Gordon P.
Merker Robert L.
Morgan Harry C.
Brown Gordon P.
Macrae & Co.
Merker Robert L.
Morgan Harry C.
Ocutech
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