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:
Feb. 04, 2003
Filed:
Aug. 08, 2001
Kiyoto Takizawa, Nagano-ken, JP;
Toshiyasu Koda, Nagano-ken, JP;
Yuji Hayashi, Nagano-ken, JP;
Mamoru Miyagawa, Nagano-ken, JP;
Nissei Plastic Industrial Co., Ltd., Nagano-ken, JP;
Abstract
It is an object of the present invention to prevent oxidation during the metal melting, by suspending both heating and supply of metal material under the monitoring by measuring the oxygen concentration in the inactive gas atmosphere. A oxidation prevent method of melting metal material by a melting vessel comprising inside a rotatable agitation member , having a weighing chamber communicating with a nozzle member , and an injection member advanceably and retractably inserting an extremity injection plunger passing through the agitation member in the weighing chamber , and the melting vessel being installed on a slant with the nozzle member downside. The space area over the melted metal surface of the melting vessel is made into inactive gas atmosphere. The oxygen concentration in this space area is measured and monitored. It is judged as error when the measured oxygen concentration exceeds a predetermined reference value, and heating and material supply are suspended to prevent the melt metal from oxidizing.