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:
Apr. 22, 2003
Filed:
Aug. 18, 2000
Applicant:
Inventors:
Keizo Aramaki, Gifu, JP;
Tsuyoshi Yoshida, Gifu, JP;
Assignee:
Tokyo Yogyo Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21C 5/48 ;
U.S. Cl.
CPC ...
C21C 5/48 ;
Abstract
A gas blowing plug and a manufacturing method therefor wherein the gas blowing plug includes a slit-shaped gas passage ( ) ranging from the bottom to the top of the plug. The gas passage ( ) is continuous or discontinuous in a horizontal cross section of the plug. The slit-shaped gas passage ( ) is also continuous from the bottom to the top of the plug and slit-shaped gas passage ( ) is discontinuous in a vertical cross section of the plug. In one example, the cross-sectional shape of the slit-shaped gas passage ( ) is a pointed star.