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:
Sep. 06, 1983
Filed:
Sep. 10, 1981
Stephen W Blakely, Alton, IL (US);
Stephen F Hager, Godfrey, IL (US);
Other;
Abstract
A method of manufacturing a heat absorbing element, the method comprising combining a first metal strip face-to-face with a second metal strip having a width greater than that of the first to form a composite strip wherein the side margins of the second strip extend laterally outwardly beyond the side edges of the first. The composite strip thus has a central portion extending longitudinally of the strip comprising a double thickness of strip and portions extending longitudinally of the strip on opposite sides of the central portion each comprising one less thickness of strip than the central portion. The central portion of the composite strip is then formed into a tube, and the tube is closed along a line extending longitudinally of the tube with the side portions of the composite strip extending outwardly away from the seam to form a pair of fins along the tube.