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:
Dec. 08, 1998
Filed:
Apr. 21, 1997
Masashi Yamada, Tokyo, JP;
Yasuhiko Komiya, Tokyo, JP;
Atsuhiko Tanaka, Tokyo, JP;
Seiichi Ito, Tokyo, JP;
Nippon Sanso Corporation, Tokyo, JP;
Abstract
A thermally insulated container of the present invention is a double-walled container in an integral body in which an inner casing is arranged in an outer casing so as to maintain a space therebetween, wherein the space is charged with a gas having a low thermal conductivity, and an opening having a diameter of 0.1 to 3 mm for charging gas in a wall of either of the inner casing and the outer casing is sealed. In a production process of the present invention, a double-walled container is obtained by arranging an inner casing in an outer casing so as to maintain a space therebetween, and by joining them into an integral body, a wall of either of the inner casing and the outer casing being provided with an opening for charging gas; then, the double-walled container is placed in a thermostatic chamber, a charging-evacuating tube which is switchably disposed to a vacuum evacuation apparatus and to a source of a gas having a low thermal conductivity is connected to the opening for charging gas, the space between the walls of the inner and outer casings is subjected to vacuum evacuation at a predetermined temperature, and thereafter a gas having a low thermal conductivity is introduced; and then, the opening for charging gas is sealed.