US 12,145,334 B2
Process for automatically gluing photochromic lenses and polarized photochromic lenses
Gianni Vetrini, Silvi (IT)
Assigned to BARBERINI S.P.A., Silvi (IT)
Appl. No. 17/611,637
Filed by BARBERINI S.P.A., Silvi (IT)
PCT Filed May 18, 2020, PCT No. PCT/IT2020/050124
§ 371(c)(1), (2) Date Nov. 16, 2021,
PCT Pub. No. WO2020/234909, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 102019000006973 (IT), filed on May 17, 2019.
Prior Publication US 2022/0242075 A1, Aug. 4, 2022
Int. Cl. B29D 11/00 (2006.01); G02B 5/30 (2006.01)
CPC B29D 11/00653 (2013.01) [B29D 11/00403 (2013.01); B29D 11/00423 (2013.01); B29D 11/00644 (2013.01); G02B 5/3033 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A process for automatically gluing a photochromic lens, comprising:
supplying an adhesive comprising photochromic molecules;
supplying an external lens;
supplying a polarizing film from a reel;
forming the polarizing film on a spherical mold;
applying a first portion of the adhesive to the polarizing film positioned on the spherical mold;
compressing the polarizing film and the external lens, while measuring a thickness of the first portion of the adhesive therebetween;
supplying an internal lens;
applying a second portion of the adhesive to the internal lens;
compressing the internal lens and the external lens having the polarizing film formed thereon, while measuring a thickness of the second portion of the adhesive therebetween using a measuring device, to uniformly distribute the second portion of the adhesive as an adhesive layer between the internal lens and the external lens;
stopping the compression of the internal lens and the external lens once a desired thickness of the adhesive layer is obtained;
cutting excess polarizing film; and
catalyzing the adhesive to form the glued photochromic lens.