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:
Mar. 19, 1991
Filed:
Dec. 29, 1989
Gerd Capelle, Langenhagen, DE;
Foley & Lardner, Schwartz et al., P.O. Box 299, L;
Hermann Berstorff Maschinenbau GmbH, Hanover, DE;
Abstract
An extrusion head for processing rubber or thermoplastic plastics material including a housing flange-mountable on a screw extrusion device. The head further including an inlet region for receiving material from the extrusion device and for receiving the downstream end of the screw, the inlet leading into a flow channel portion and a nozzle outlet which receives the material from the flow channel for extrusion in the form of a shaped profile. A sealable air discharge device is disposed in the flow channel portion to remove air bubbles, particularly that which is formed during the start up phase of the extrusion downstream of the downstream end of the screw.