Plastic and nonmetallic article shaping or treating: processes – With step of making mold or mold shaping – per se – Utilizing surface to be reproduced as an impression pattern
Patent
1978-07-10
1981-05-05
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
With step of making mold or mold shaping, per se
Utilizing surface to be reproduced as an impression pattern
249126, 249127, 249168, 2643281, 26433117, 264337, 351154, 425542, 425595, 425DIG59, B29C 102, B29F 100
Patent
active
042658500
ABSTRACT:
The invention relates to the production of spectacle frame parts of synthetic material and in particular to the moulding of spectacle frame faces of synthetic material, for example, of polyurethane.
The faces are moulded between two casting half-moulds each comprising a plate having an impression on one surface thereof. Each plate has a substantially equal thickness at every point and is made of a polyolefine. Use of such half-moulds enables the faces of spectacle frames to be directly moulded into their final shape.
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Coulon Michel
Laprade Gerard
Anderson Philip
Brown Charles E.
Essilor International "Cie Generale d'Optique
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