Patent ID: 7950917

Claim:
A molding installation for forming an optical lens having a substantially circular shape and a substantially regular transversal thickness comprising: a mixing chamber for preparing a mixture to be molded; a sealed mold cavity with a substantially circular shape, comprising a center, and a transversal thickness corresponding to that of the lens to be obtained, the mold cavity being limited by two plates between which is inserted an elongated seal, and comprising an entry side provided with a casting opening and an evacuation side opposite to the entry side; an injection duct connecting the mixing chamber to the mold cavity, the injection duct having an outlet opening; a spout connecting the outlet opening of the injection duct to the casting opening of the mold cavity; a filler adapted to force the flow of the mixture from the mixing chamber to the mold cavity via the injection duct and the spout for filling the mold cavity under pressure during use; and at least a vent on the evacuation side of the mold cavity; the spout defining a substantially flat space having an axis substantially passing by the center of the mold cavity and being limited by two flat faces and two diverging sides inclined on either side of the axis and tangentially connecting to the circular shape of the mold cavity.