Patent · US Active

Method of dosing a lens forming material into a mold

US9050761B2 · kind B2 · utility

0Cited by

5References

9Claims

0Family size

Assignee

Novartis AG · CH

Inventors

Matthias Braun · Ludwigsburg, DE
Axel Heinrich · Aschaffenburg, DE
Peter Hagmann · Erlenbach a.Main, DE

Key dates

Filing date	Dec 16, 2010
Grant date	Jun 9, 2015
Priority date	—
Expiry date	Oct 27, 2031

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29D11/00538
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

There is described a method of dosing a lens forming material into a mold (1;21), which comprises dosing a metered amount of a lens forming material (P) including a volatile solvent into a mold cavity (4) enclosed by a female mold half (2) and a male mold half of a mold (1;21). The lens forming material (P) is subsequently polymerized and/or cross-linked to form an ophthalmic lens, in particular a contact lens. Dosing of the lens forming material (P) into the mold cavity (4) is accomplished while the mold halves (2, 3) are associated with each other substantially gas-tight. There is also described an apparatus for carrying out the method.

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