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. 19, 2000
Filed:
May. 09, 1995
Applicant:
Inventors:
Soichi Kato, Saitama, JP;
Takashi Sugita, Saitama, JP;
Assignee:
Zexel Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23P / ;
U.S. Cl.
CPC ...
29890053 ; 29890054 ;
Abstract
A method of manufacturing flat tubes by forming a flat tube body from a single plate material which is continuously drawn from a drum by either folding it into two or placing two plate materials one upon the other, and cutting the flat tube body in a predetermined length. The method is characterized by the steps of placing the plate material with its inner surface facing downwardly at any selected stage before completion of folding the plate into two, or before completion of placing two plates one upon the other; fluxing the inner surface of the plate material with a liquid flux material, and drying the applied flux material.