Loading patent…
AssigneeNovartis AG
InventorsAxel Heinrich, Halina Heidrich, Alexander Bayer, Karsten Straube, Peter Hagmann, Stephan Pirl, Jan Bernard, Matthias Braun
Estimating the term…
The present invention relates to a mold half for making an ophthalmic lens, in particular a contact lens, wherein the mold half comprises a release sheet removably arranged on the mold surface of said mold half to separate a lens forming material from the mold surface, as well as to a method for applying a removable mold release sheet to said mold half. The mold half of the invention comprises a vacuum means to removably attach said release sheet to said mold surface, and preferably the mold half further comprises a pinch-off rim for forming the edge of said ophthalmic lens.
A mold half, for making an ophthalmic lens, comprising a mold surface, a lens forming area and a release sheet removably arranged on the mold surface of said mold half, characterized in that the release sheet has a thickness of from 5 to 50 μm, tightly conforms to the contour of at least the lens forming area of said mold half and extends substantially beyond said lens forming area, wherein said mold half comprises vacuum means to removably attach said release sheet to said mold surface.
Dependencies are inferred from the claim text.