Patent ID: 8449807
Filing Date: 2013-05-28
Classification: A61M,B01F,B29C,B29D,B29K,B29L,B32B,G02B,Y10T

Abstract:
1. A method of injection molding comprising: providing an injection molding apparatus having a first mold member and at least one movable mold member that can move toward and away from the first mold member to close a mold; and applying ultrasonic vibrations to the mold; said method characterized by: i) positioning a polymer film carrier web so that, when the mold is closed, the carrier web is between the first mold member and the moving mold member, part of the web faces the mold and part of it is outside of the closed mold; and ii) injecting polymer melt into mold cavities in both the first and movable mold members between which the carrier web is positioned while the mold is closed; iii) said mold cavities being opposite each other and shaped to form a lens or lenses; whereby an injection molded lens or lenses are made having parts on both sides of the carrier web.