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. 09, 2003
Filed:
Sep. 19, 2000
Richard L. Fischer, Lisle, IL (US);
Marconi Communications, Inc., Cleveland, OH (US);
Abstract
A process for making inner and outer ducts for a simple but effective plastic heat exchanger by a simple blow molding or thermoforming technique. Seals are formed by providing initially closed inner ducts which are stacked on one another and the end portions of the inner ducts are placed in a mold. A castable adhesive sealant is placed in the mold and around the stacked inner ducts. After curing, the mold and the stacked inner ducts are separated and a portion of the stack and a portion of the seal material are cut and removed. Thereafter, the outer duct is positioned about the stacked inner ducts so that two different flow paths are formed. Instead of molding the seal, a preformed seal may be press fitted to the stack of inner ducts.