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. 19, 2013
Filed:
Aug. 12, 2008
Applicants:
Ruediger Carloff, Darmstadt, DE;
Joachim Heid, Fraenkisch-Crumbach, DE;
Heinz Vetter, Rossdorf, DE;
Inventors:
Assignee:
Evonik Roehm GmbH, Darmstadt, DE;
Primary Examiner:
Int. Cl.
CPC ...
B29C 47/38 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a vented extruder () for the devolatilization of a polymer material, encompassing at least one extruder barrel () with at least one rotatably driven extruder screw () mounted in the extruder barrel (), and with at least one material feed and with at least one extrudate outlet, and also with at least one vent zone (). A particular feature of the vented extruder () is that the gas output for the gas arising in the vent zone () has been provided upstream of the material feed, in relation to the direction of conveying of the polymer material.