US 12,377,512 B2
Optical element blocking method and related device
Sébastien Pinault, Charenton-le-Pont (FR); Luc Martin, Charenton-le-Pont (FR); and Caroline Ho, Charenton-le-Pont (FR)
Assigned to Essilor International, Charenton-le-Pont (FR)
Appl. No. 17/763,964
Filed by ESSILOR INTERNATIONAL, Charenton-le-Pont (FR)
PCT Filed Sep. 24, 2020, PCT No. PCT/EP2020/076647
§ 371(c)(1), (2) Date Mar. 25, 2022,
PCT Pub. No. WO2021/058612, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 19306216 (EP), filed on Sep. 27, 2019.
Prior Publication US 2022/0339752 A1, Oct. 27, 2022
Int. Cl. B24B 13/005 (2006.01)
CPC B24B 13/0052 (2013.01) 8 Claims
OG exemplary drawing
 
1. A blocking system, the blocking system comprising:
at least one blocking device comprising
an insert having a surface configured to be blocked against a face of one optical element,
a receiver configured to contain thermoplastic material in a solid state in a first particulate form,
a heater configured to heat at least a part of the thermoplastic material at a temperature at which the thermoplastic material is in a melted state and flows under pressure,
a nozzle configured to dispense the thermoplastic material in the melted state onto the surface of the insert, the thermoplastic material solidifying after the optical element is placed, thereby blocking the optical element on the insert, and
a converter configured to convert the solidified thermoplastic material into a second particulate form, the converter being directly connected to the receiver.