Patent · US Active

Method for avoiding entrapment of air bubbles in a lens forming material and apparatus for carrying out the method

US9849642B2 · kind B2 · utility

0Cited by

1References

18Claims

0Family size

Assignee

Novartis AG · CH

Inventors

Lukas Lomb · Mainaschaff, DE
Roland Schmieder · Aschaffenburg, DE
Gabriela Cocora · Elsenfeld, DE
Halina Heidrich · Kahl am Main, DE
Axel Heinrich · Aschaffenburg, DE
Peter Hagmann · Erlenbach a.Main, DE

Key dates

Filing date	Dec 17, 2014
Grant date	Dec 26, 2017
Priority date	—
Expiry date	Feb 13, 2036

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29K2995/001
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A method for avoiding the entrapment of air bubbles (5) in a lens forming material, in particular in a low viscosity lens forming material, in an ophthalmic lens manufacturing process using mold halves (2; 3) each having a lens forming surface (21; 31) comprises electrostatically charging a predetermined portion of the lens forming surface (21; 31) of the mold half (2; 3) prior to the predetermined portion of the lens forming surface (21; 31) coming into contact with the lens forming material (4).

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