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:
May. 05, 2015
Filed:
Jul. 22, 2011
Hanns-ingolf Paul, Leverkusen, DE;
Udo Wiesner, Bornheim, DE;
Jörg Kirchhoff, Köln, DE;
Thomas König, Leverkusen, DE;
Klemens Kohlgrüber, Kürten, DE;
Hanns-Ingolf Paul, Leverkusen, DE;
Udo Wiesner, Bornheim, DE;
Jörg Kirchhoff, Köln, DE;
Thomas König, Leverkusen, DE;
Klemens Kohlgrüber, Kürten, DE;
LANXESS Deutschland GmbH, Cologne, DE (US);
Abstract
The invention is directed to an extruder (), particularly for extruding a synthetic rubber product, which comprises a barrel (), one or several extruder elements (), particularly one or several extruder screws and/or a kneader elements (), arranged inside the barrel () for conveying the product, optionally an inlet port for feeding a stripping agent into the barrel () and an outlet port for removing volatile compounds from the product and, where applicable, the stripping agent. According to the invention a perforated die plate () is fixed to the barrel () in flow direction before the outlet port. Since the die plate () is not fixed to the extruder elements () but to the barrel () a circumferential clearance between the die plate () and the barrel () is prevented so that no extruded material is passing the die plate () radially outside. Parts of the extruded material comprising a low surface area to volume ratio are prevented so that the evaporation of volatile compounds is facilitated.