The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2011
Filed:
Feb. 25, 2005
Noémie Lesartre, Paris, FR;
Jérôme Dupuy, Villeurbanne, FR;
Abderrahim Maazouz, Villeurbane, FR;
Jean-pierre Pascault, Villeurbanne, FR;
Noémie Lesartre, Paris, FR;
Jérôme Dupuy, Villeurbanne, FR;
Abderrahim Maazouz, Villeurbane, FR;
Jean-Pierre Pascault, Villeurbanne, FR;
Institut National Des Sciences Appliquees (Insa), Villeurbanne, FR;
Abstract
The object of the invention is a process for molding an optical element such as a lens (). According to the invention, the element is obtained by a reaction injection molding process comprising the steps of mixing at least two polymerizing reactants and forcing the obtained reacting mixture by an injection duct () for filling under pressure a scaled mold cavity () having an entry side () provided with a casting opening () and an evacuation side () and providing a laminated flow of mixture in a spout () having a progressive enlarging transversal section between the outlet opening () of the injection duct () and the casting opening () of the mold cavity (), for avoiding any turbulent area in said laminated flow, said evacuation side () being provided with means () for evacuating air contained in the mixture during mold filling. The invention also covers the molding installation adapted for using such a process.