Thermoplastic lens fixing method for spectacles, involves fastening, with heat and under pressure, anchoring units provided on frame of spectacles in thickness of thermoplastic lens by deforming plastic lens
The method involves fastening, with heat and under pressure, anchoring units (9, 10) provided on a frame of spectacles in a thickness of a thermoplastic lens (1) by deforming the plastic lens. The lens is made of polycarbonate. The anchoring units comprise conical projections (11, 12), rear backstop...
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| Format: | Patent |
| Sprache: | eng ; fre |
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| Zusammenfassung: | The method involves fastening, with heat and under pressure, anchoring units (9, 10) provided on a frame of spectacles in a thickness of a thermoplastic lens (1) by deforming the plastic lens. The lens is made of polycarbonate. The anchoring units comprise conical projections (11, 12), rear backstop bases (15, 16) and axles (17, 18), whose transversal section surface is less than a surface of the backstop bases for maintaining a free space. Independent claims are also included for the following: (1) a machine for fixing a thermoplastic lens on a frame of spectacles (2) a frame and thermoplastic lens assembly for fabrication of spectacles.
L'invention concerne un procédé de fixation d'une lentille (ou verre de lunette) du type « verre organique » à propriété thermoplastique sur une monture ou un élément de monture de lunette, caractérisé en ce qu'il consiste à sceller, à chaud et sous pression, des moyens d'ancrage prévus sur la monture ou une pièce de monture, dans l'épaisseur de la lentille, par déformation de la matière constituant la lentille. |
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