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:
Nov. 08, 1977
Filed:
Jul. 28, 1976
Applicant:
Inventor:
Pierre Berger, Saint-Etienne, FR;
Assignee:
Creusot-Loire, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29B / ;
U.S. Cl.
CPC ...
425 73 ; 159 / ; 366 84 ; 425203 ; 425204 ; 4253 / ; 425812 ;
Abstract
A device for degassing plastic materials comprising an extruder including at least three parallel screws intermeshing in pairs, arranged in a casing which follows the periphery of the screws and arranged around a central stem, the surface of which also follows the periphery of the screws so that the screws are encased over a substantial part of their periphery. The casing is provided with a supply inlet, an end plate through which degassed material is extruded and a degassing outlet through which gases are withdrawn, the degassing outlet being upstream with respect to the supply inlet.