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:
Aug. 01, 1989
Filed:
Jul. 21, 1988
Applicant:
Inventor:
Hiroshi Kawase, Tokyo, JP;
Assignee:
Furukawa Aluminum Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
2915 / ; 291574 ; 295274 ; 29557 ;
Abstract
A method of manufacturing extruded flat multihole aluminum tube for heat exchangers is disclosed, which is characterized in that, in the hot extrusion of flat multihole Al-Cu or Al-Cu-Mn tubes, a plurality of tubes are extruded side by side in the longitudinal direction and Zn is flame sprayed onto both even surfaces of the tubes in the vicinity of the extrusion exit of the tubes to cover both even surfaces of the extruded tubes with Zn. The covering level of Zn is 3 to 30 g/m.sup.2.