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:
Nov. 13, 1990
Filed:
Aug. 15, 1988
Peter Kunz, Schaffhausen, CH;
Georg Fischer AG, Schaffhausen, CH;
Abstract
A device for welding tubular components of thermoplastic material. The device includes a heating device for generating the necessary melting temperature arranged at the circumference and at the abutting ends of the tubular components. The bag or casing is arranged in the region of the welded connection inside the tubular components. The bag or casing is capable of being expanded and pressed against the inner circumference of the tubular components. Pressing the casing against the inner circumference of the tubular components prevents the formation of a welding bead during the welding procedure and serves to generate a welding pressure. After welding has been carried out, the casing is radially contracted and removed from the tubular components.