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:
Dec. 26, 1989
Filed:
Mar. 23, 1989
Battenfeld Fischer Blasformtechnik GmbH, Lohmar, DE;
Abstract
An extruder head for the extrusion of tubular preforms having single-layer or multiple-layer walls, from plastics material which has been plasticized in extruders. The extruder head utilizes the so-called coextrusion system. The extruder head includes a plurality of equal or similar head parts which can be optionally placed one behind the other and each have a central annular discharge and/or passage duct. Each of the head parts has at least one spirally extending distributor which leads via an annular gap to the discharge and/or passage duct. The ends of adjacent head parts facing one another have complementary engagement elements which are used to bring the discharge and/or passage ducts into axial alignment.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile