Method for making lenses

Details Method for making lenses Method for making lenses

1992-08-19

1994-11-29

Vargot, Mathieu

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Changing mold size or shape during molding or with shrinkage...

264296, 264322, B29D 1100

Patent

active

053687906

ABSTRACT:
A method for forming a preform mass of thermoplastic material into a lens without the formation of air bubbles or the entrapment of air pockets in the finished lens includes softening the preform mass under a predetermined pressure and temperature and continuing to apply the predetermined pressure while increasing the temperature until the mass has been compressed between two molds into the shape of the lens.

REFERENCES:
patent: 2166215 (1939-07-01), Lloyd
patent: 2298429 (1942-10-01), Smith
patent: 2304217 (1942-12-01), Tillyer
patent: 2304663 (1942-12-01), Smith et al.
patent: 2532501 (1950-12-01), Johnson
patent: 2664025 (1953-12-01), Herman

Affiliated with

Also associated with

Rating

Method for making lenses does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for making lenses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for making lenses will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-72219