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:
Apr. 14, 2015
Filed:
Aug. 05, 2010
Applicant:
Eric Roussel, Charenton-le-Pont, FR;
Inventor:
Eric Roussel, Charenton-le-Pont, FR;
Assignee:
Essilor International (Compagnie Generale d'Optique), Charenton-le-Pont, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 51/18 (2006.01); B29C 51/42 (2006.01); B29C 51/08 (2006.01); B29C 51/10 (2006.01); B29C 51/16 (2006.01); B29C 51/26 (2006.01); B29L 11/00 (2006.01);
U.S. Cl.
CPC ...
B29C 51/424 (2013.01); B29C 51/08 (2013.01); B29C 51/10 (2013.01); B29C 51/16 (2013.01); B29C 51/262 (2013.01); B29C 2791/006 (2013.01); B29L 2011/0016 (2013.01);
Abstract
A thermoforming device heats a plastic film to a substantially uniform temperature, in order to impart a curved shape to said film. The device includes a chamber, the internal pressure of which is variable and which is closed by the film, a system for measuring a sag in the film arranged outside the chamber and opposite said film, and a system for heating the film. The heating system includes a hot air blowing unit which is suitable for producing a hot airflow flowing parallel to the film between two opposite edges of said film.