Patent · US Active

Injection molding a lens onto a coated ophthalmic wafer

US7906047B2 · kind B2 · utility

11Cited by

8References

23Claims

0Family size

Assignee

Essilor International (Compagnie Generale d'Optique) · FR

Inventors

Xu Chen · Apex, US
Joey Oliveros Obordo · Sanford, US
Hsinjin Yang · Fairport, US

Key dates

Filing date	Dec 21, 2005
Grant date	Mar 15, 2011
Priority date	—
Expiry date	Feb 13, 2028

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29L2011/0016
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A method of in-mold coating utilizing an injection molding machine oriented to a horizontal parting line. At the beginning of the cycle the mold opens and a charge of liquid coating solution is deposited onto the lower mold insert. A ophthalmic wafer is deposited on the coating to spread it across the insert surface. The mold is closed and a pre-cure phase elapses before the thermoplastic resin is injected into the mold cavity above the wafer. The process provides coated and functionally enhanced lenses upon ejection from the molding machine.

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