ENSEMBLE DE JOINT DE COULEE SERVANT A COULER DES LENTILLES EN MATIERE PLASTIQUE

ENSEMBLE DE JOINT DE COULEE SERVANT A COULER DES LENTILLES ENTRE DEUX MATRICES, COMPRENANT UN PREMIER ELEMENT DE JOINT 21 MUNI D'UN PREMIER PASSAGE CENTRAL DONT UNE EXTREMITE COMPREND UN PREMIER AGENCEMENT DESTINE A RECEVOIR DE FACON COMPLEMENTAIRE L'UNE DES MATRICES 22, ENSEMBLE REMARQUABLE PAR LE FAIT QU'IL COMPORTE UN DEUXIEME ELEMENT DE JOINT 23 MUNI D'UN DEUXIEME PASSAGE CENTRAL DONT UNE PARTIE COMPREND UN DEUXIEME AGENCEMENT DESTINE A RECEVOIR DE FACON COMPLEMENTAIRE L'AUTRE MATRICE 24, LES ELEMENTS DE JOINT COMPRENANT DES AGENCEMENTS PERMETTANT DE LES ADAPTER ENTRE EUX DE FACON COMPLEMENTAIRE ET ETANCHE, LES MATRICES ETANT PLACEES FACE A FACE AVEC ESPACEMENT, LES MATRICES ET LES ELEMENTS DE JOINT DEFINISSANT UNE CAVITE DE COULEE DE LENTILLES. A gasket assembly for casting optical lenses includes a first gasket member having a cylindrical opening therethrough and an annular flange extending radially inwardly in the cylindrical opening. One surface of the flange is adapted to receive a casting lens die, and may be disposed in a plane not perpendicular to the axis of the cylindrical opening. A second gasket member is adapted to be received in the first gasket member, and includes an inwardly extending annular flange having one surface adapted to mate with the flange of the first gasket member. The other side of the annular flange of the second gasket member includes a shaped surface adapted to receive a lens casting die having the capability of conferring on the cast lens any combination of power and cylinder characteristics, the shaped surface being configured to mate and seal with the peripheral area of the compound surface of the die. The gasket members may be mated together with the second gasket member rotatable in its mating arrangement with the first, so that a limited number of casting dies and gasket members may be used to cast lenses of any combination of sphere power, cylinder power, prism, and any other desired ophthalmic characteristics.