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:
Dec. 02, 2008
Filed:
Dec. 04, 2003
Applicants:
Timothy E. Herod, Seminole, FL (US);
Hsinjin E. Yang, Palm Harbor, FL (US);
Inventors:
Timothy E. Herod, Seminole, FL (US);
Hsinjin E. Yang, Palm Harbor, FL (US);
Assignee:
Essilor International, , FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 51/10 (2006.01); B29C 51/18 (2006.01); B29C 51/36 (2006.01); G02C 7/02 (2006.01); G02B 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for thermoforming a thin thermoplastic carrier with uniformity of thickness at optical quality. The sheet to be thermoformed is heated and placed on a vented platform equipped with a mold insert. The thermoformer's platens clamp a shroud over the sheet. A low pressure air stream is introduced into the shroud and deflected from a direct path leading to the mold insert.