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:
May. 01, 1979
Filed:
Mar. 14, 1978
Dietmar Przytulla, Sindorf, DE;
Manfred Lehmann, Cologne, DE;
Mauser Kommandit-Gesellschaft, Bruhl, DE;
Abstract
In an axially extending extruder head for producing a thermoplastic tubular member, the material to be extruded is first supplied into a pair of annular first passageways spaced apart in the axial direction of the head, these passageways extend obliquely of the head axis. From the first passageways the material enters an axially elongated annular second passageway extending between the two first passageways. An annular third passage, extending transversely of the head axis, conveys the material from the second passageway into an axially extending feed passageway from which the material is extruded through the nozzle end of the head. The first, second and third passageways can be located in different parts of the extruder head.