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:
Jun. 22, 1976
Filed:
Feb. 20, 1975
Applicant:
Inventors:
John R Bedell, Sparta, NJ (US);
Robert W Smith, Flanders, NJ (US);
Assignee:
Allied Chemical Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
164 66 ; 164 82 ; 164259 ; 1642 / ;
Abstract
A stopper rod tapping assembly for bottom tapping of a crucible to extrude molten metal through a tapping orifice is described. The stopper rod has an interior vent, providing communication of a pressurized inert gas from above the melt to the tapping orifice in the bottom of the crucible. The vent permits flushing of the tapping orifice between tapping runs to prevent buildup of residues in the tapping orifice which would otherwise adversely affect the tapping operation. The assembly is advantageously used in casting filaments from the molten metal.