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. 07, 1983
Filed:
Mar. 09, 1981
Applicant:
Inventors:
Helmut Landgraf, Duisburg, DE;
Walter Stucke, Ratingen, DE;
Assignee:
Mannesmann Aktiengesellschaft, Dusseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ; B32B / ;
U.S. Cl.
CPC ...
156382 ; 15624414 ; 156500 ; 264173 ; 264174 ; 2642711 ; 264279 ; 425113 ;
Abstract
Steel pipes pass through an extruder with a low-pressure antechamber for obtaining suction of an extruded hose against the pipe. The entrance to that antechamber is sealed by a combination of rubber elastic and spring steel disks, the latter having tongues being deflected by the pipe entering the chamber, and tongues of one disk sealingly cover the slots of an adjacent disk.