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:
Oct. 25, 1994
Filed:
Jul. 26, 1993
Abstract
A heat-treating apparatus has a reaction vessel being adapted for performing a heat process for a workpiece to be treated and having a joint pipe portion and an outer pipe jointed to the joint pipe portion and of the reaction vessel. A sealing member is disposed between the outer pipe and the joint pipe portion. The sealing member has a relatively soft core member and a film harder than the core member. The film is disposed on the surface of the core member and has a heat resistance and a chemical resistance. Since the core member of the sealing portion has flexibility, it easily deforms corresponding to the shape of the sealing portion. The film provided on the core member prevents the sealing member from thermally adhering to the sealing portion and from thermally deteriorating.