Patent · US Active

Mold release sheet

US8944795B2 · kind B2 · utility

0Cited by

25References

12Claims

0Family size

Assignee

Novartis AG · CH

Inventors

Axel Heinrich · Aschaffenburg, DE
Halina Heidrich · Kahl am Main, DE
Alexander Bayer · Niedernberg, DE
Karsten Straube · Wittenberg, DE
Peter Hagmann · Erlenbach a.Main, DE
Stephan Pirl · Obernburg, DE
Jan Bernard · Niedernberg, DE
Matthias Braun · Ludwigsburg, DE

Key dates

Filing date	Dec 15, 2009
Grant date	Feb 3, 2015
Priority date	—
Expiry date	Jan 21, 2032

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C33/68
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.