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:
Oct. 08, 2002
Filed:
Mar. 26, 2001
Shotaro Hidaka, Tokyo, JP;
Mamoru Yamada, Tokyo, JP;
Hidaka Seiki Kabushiki Kaisha, Tokyo, JP;
Abstract
The method of manufacturing a heat exchanging fin is able to restrict forming wrinkles and ring marks in the heat exchanging fin. The method comprises the steps of: forming dome sections having diameters greater than the diameters of collared-through-holes and which are projected from one side face of a thin plate, and a plurality of circular recesses having diameters greater than of the dome sections, each of which encloses one of the dome sections, the circular recesses being depressed toward the opposite face of the thin plate; forming the dome sections and the recesses into truncated cone-shaped sections in a plurality of steps; forming a through-hole in each of the truncated cone-shaped sections; forming edges of the through-holes into collars; and forming a flange at a front end of each of the collars.