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:
Feb. 26, 1985
Filed:
Feb. 19, 1982
Applicant:
Inventor:
Helmut Landgraf, Duisburg, DE;
Assignee:
Mannesmann AG, Duesseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
156187 ; 156188 ; 15624413 ; 15624418 ; 156443 ; 156446 ; 156500 ;
Abstract
A thermoplastic hose is extruced, longitudinally, but in opposite (thinned) locations, and the resulting two semi-circular sheets are flattened, superimposed with an offset, and wrapped around a rotating and axially advanced pipe. The hose may be extruded from above or from the side. The method and apparatus is applicable also for high-density PE (e.g., 0.95).