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. 11, 1985
Filed:
May. 26, 1983
Toray Industries, Inc., Tokyo, JP;
Abstract
A vertical carbonizing furnace for use in the production of carbon fibers is provided with a vertically extending conduit of hollow rectangular parallelepiped. The lower end of the conduit is immersed in water thereby making a water seal from environmental air. The conduit is also provided with a gas withdrawal outlet which communicates with the upper portion of the conduit through a gas feeding duct for reuse. The mixture of a vapor evaporated from the water seal and an inert gas is withdrawn from the gas withdrawal outlet and fed to the upper portion of the conduit as gas for sealing thereby preventing fibers and the conduit made of carbon or graphite from being deteriorated by said vapor evaporated from the water seal and providing a gas for sealing the upper end of the conduit.