Method for coating foil material

Abstract

Process for coating foil material of any desired shape with an injectable and pressable mass which stabilizes the foil material. An initially planar heated foil material is pressed by means of a depressor against a movable mold member of an injection mold having a movable mold member and a stationary mold member, with the injection mold having a shape which corresponds to the later shape of the foil material. The foil material is then pulled against the surface of the movable mold member by subatmospheric pressure. Subsequently, the movable mold member is moved toward the stationary mold member of the injection mold to provide a gap between the foil material and stationary mold member and the mass is slowly injected into the gap remaining between the foil material and the stationary mold member. The two mold members are further closed to finally distribute the mass over the foil material and press the mass to the required thickness. An apparatus is provided for practicing this method.

Dependencies are inferred from the claim text.