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:
Nov. 16, 2010
Filed:
Oct. 26, 2006
Donald V. Beauregard, Jamestown, RI (US);
Nick R. Schott, Westford, MA (US);
Stephen A. Orroth, Windham, NH (US);
Dwayne R. Cote, Nashua, NH (US);
Danielle L. Froio, Watertown, MA (US);
Donald V. Beauregard, Jamestown, RI (US);
Nick R. Schott, Westford, MA (US);
Stephen A. Orroth, Windham, NH (US);
Dwayne R. Cote, Nashua, NH (US);
Danielle L. Froio, Watertown, MA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
An extrusion apparatus is taught that employs a die adapter that is partially submerged in a heat transfer bath on a horizontal plane such that there is no air gap between the die extrusion aperture and the heat transfer bath. A porous dam is positioned between the die and the heat transfer bath. A heat insulating plate is positioned between the porous dam and the die to prevent the heat transfer medium from flowing onto the die. The heat insulating plate also prevents excessive cooling of the die tip thereby allowing the necessary precise thermal control over the extrudate skin formation to prevent melt fracture and form a low density extrudate with a smooth solid skin and inner foamed core.