establishment of the angießen a metallic ingot on the surface of a semi-finished brillenglasrohlings agreement

摘要

Blocking apparatus for fixing a metal block on the finished face of a roughing semi - finished ophthalmic lens by coulee of a metal has a low melting point in a mould placed in contact with the finished face of the roughing. / p & & p & the stationary part 4 and mobile 5 of mould 3, which respectively carry the seat 9 for the roughing and the elements in relief 18, are in contact with the spherical surfaces 16 forming a seal has a ball joint center on the axis 17 of the seat 9. The control means 30, 31, 32 are connected to a shaft 19, 29 integral with the part 5 of mould 3 in order to orient it and the tilt about the center c of the seal has a ball joint in order to give the metallic block desired the value of the prism and the orientation desired the axis of the prism and to align the elements in relief 18 level with the axis of the cylinder.