The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 24, 2023
Filed:
Nov. 25, 2019
Alcon Inc., Fribourg, CH;
Thomas Tonn, Aschaffenburg, DE;
Jan Bernard, Niedernberg, DE;
Halina Heidrich, Kahl am Main, DE;
Eduard Jetzlaff, Schollbrunn, DE;
Yasin Acikgoez, Munster, DE;
Maricel Teresa Repetto, Aschaffenburg, DE;
Matthias Schwab, Amorbach, DE;
Alcon Inc., Fribourg, CH;
Abstract
An injection molding apparatus for manufacturing an ophthalmic lens mold having a front surface comprising a lens forming portion and a rear surface, comprises a first molding tool and a second molding tool. The first and second molding tools are movable towards and away from each other between a closed position and an open position. In the closed position the first mold forming portion of the first molding tool and the second mold forming portion of the second molding tool define a cavity between them corresponding in shape to the shape of the ophthalmic lens mold. The surface of the second mold forming portion, at least in a central zone thereof, has a surface roughness Sin the range of 0.3 μm to 2 μm, and a surface roughness Sin the range of 10 μm to 50 μm.