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. 06, 2012
Filed:
Jan. 14, 2009
Helmuth Schulz, Linz, AT;
Helmuth Schulz, Linz, AT;
EREMA Engineering Recycling Maschinen und Anlagen Gesellschaft m.b.H., Freindorf, Ansfelden, AT;
Abstract
The invention relates to an apparatus for extruding thermoplastic material, comprising an extruder screw () which is mounted in a housing (), comprises a plasticizing section (P) on the inlet side, a degasification section (E) upstream of an outlet section (A), a flow arrester (S) between the plasticizing section (P) and the degasification section (E) with a screw section with a counter-rotating delivery flight (), and at least one flow channel () bridging the flow arrester (S) and containing a melt filter (). In order to reduce the driving power of the extruder screw () it is proposed that a sleeve (), which encompasses the screw () and is mounted in the housing () in a rotationally fixed manner, is associated with the screw section that forms the flow arrester (S), and the screw () in the screw section of the flow arrester (S) has a smaller screw diameter in relation to the plasticizing section (P) and preferably also to the degasification section (E).