Snow Brand Milk Products Co., Ltd.

Netsushin Co., Ltd.

Tomosuke Imamura

Kensuke Itoh

Yukihiro Saiki

Kazuichi Aoki

Satoshi Nishimura

An improved new type pyrometer and a method for fusing an alumina pipe having a high purity are disclosed. The temperature-measuring portion of the pyrometer includes a protective pipe made of alumina having a purity of at least 99.9% and a temperature-measuring resistance element of a platinum or platinum-rhodium resistance wire and a holding portion made of alumina having a purity of at least 99.9%. Owing to the use of high purity alumina, the platinum or platinum-rhodium resistance wire is not contaminated and has stable temperature characteristics at high temperatures. According to the method of this invention, an end of an alumina pipe having a purity of at least 99.9% can be fused without the aid of any binder by fusing the end while evacuating air from the alumina pipe through its opposite end.

Growing community of inventors

Saitama, Japan

Tomosuke Imamura