SEATING RING TO HOLD A MOUNTING BLOCK ON A PROGRESSIVELY ARCING FINISHED FACE OF THE SEMI-FINISHED PALET BLANK, SUCH AS AN OPHTALMIC LENS OR MOLD

摘要

specific disclosure.it is a support ring for forging semi-finishedan ophthalmic lens or a mold by this kind ofthe draft for which contact with semi-finished processing.a limited number of well spaced areas of supportcircularly around the axis of the package. thus according to theand the tangent to the ends of each of the plans.areas of support are a wedge between the supporting surface.this area provides overall support in practiceconvex. application in the casting of a mounting block on theface finished a draft of a semi finished lens ophtalmi -gradual.