Method of making a moulded photochromic lens

Details Method of making a moulded photochromic lens Method of making a moulded photochromic lens

1993-04-21

1995-04-11

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Composite or multiple layer

264 18, 264 22, 264245, 2643287, 2643288, B29D 1100

Patent

active

054055571

ABSTRACT:
A lens has two or more layered sections of thermosetting material, and a substantially homogenous formation in which at least one of the layered sections has an active photochromic material present. The article is made by: forming a mould cavity from first and second mould halves; loading the mould cavity with a first thermosetting material; partially curing that material; changing the second mould half to define a subsequent mould cavity in which the partially cured material is present; loading the subsequent mould cavity with a subsequent thermosetting material; and curing the first and subsequent thermosetting materials. At least one of the thermosetting materials is loaded with an active photochromic material.

REFERENCES:
patent: 2635289 (1953-04-01), Owens
patent: 3363039 (1968-01-01), Nagai et al.
patent: 3716489 (1973-02-01), DeLapp
patent: 3822107 (1974-07-01), Wogerer
patent: 4076788 (1978-02-01), Ditto
patent: 4657354 (1987-04-01), Kobayashi
patent: B14758448 (1994-01-01), Sandvig et al.
patent: 4758448 (1988-07-01), Sandvig et al.
patent: 4919850 (1990-04-01), Blum et al.
patent: 5084223 (1992-01-01), Morita et al.
patent: 5219497 (1993-06-01), Blum

Affiliated with

Also associated with

Rating

Method of making a moulded photochromic lens 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 of making a moulded photochromic lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making a moulded photochromic lens will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1536559