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. 17, 1980
Filed:
Aug. 25, 1978
Dietmar Przytulla, Sindorf, DE;
Mauser Kommandit-Gesellschaft, Bruhl, DE;
Abstract
An extrusion head for producing tubes of thermoplastic material includes a housing laterally enclosing a mandrel and an extruding nozzle mounted on one end of the housing. The housing and mandrel combine to form an accumulator space into which the thermoplastic material is charged from a source. One of the housing and the mandrel includes an extrusion plunger which is displaceable away from the nozzle into the accumulator space for displacing the thermoplastic material toward the nozzle. As the plunger moves into the accumulator space it forms one side of a variable length annular passageway defining the outlet path of the thermoplastic material from the accumulator space.