Contact lens casting mould
AssigneeCiba-Geigy Corporation
InventorsWilhelm Horner, Peter Hofer, Peter Hagmann
Life of this patent
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Abstract
A contact lens casting mould includes two casting mould halves. A concave shaping surface (11) is constructed on a female part (1) and a convex shaping surface (21) on a male part (2). When joined together, the two casting mould halves (1 and 2) adhere by frictional connection.
Claims11
A contact lens casting mould comprising two casting mould halves, a first of said mould halves being a female part having a concave shaping surface and a second of said mould halves being a male part having a convex shaping surface, wherein said shaping surfaces delimit a closed volume having a concave-convex and generally rotation symmetrical shape when the female part and the male part are joined together, said female part having a cylindrical body portion surrounding the concave shaping surface, a vertical outer wall of said cylindrical body portion having fixing elements thereon, and said male part being provided with a cylindrical projecting extension surrounding and projecting beyond said convex shaping surface, and wherein said female part and said male part are joined together, said fixing elements and said cylindrical projecting extension adhere to each other soley by frictional contact for assuring a tight fit of said male and female parts wherein said fixing elements are of vertical ribs.
Dependencies are inferred from the claim text.