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:
Jul. 25, 2006
Filed:
Oct. 02, 2002
Federico Innerebner, Zürich, CH;
Andreas Christel, Zuzwil, CH;
Achim-philipp Sturm, Niederuzwil, CH;
Jürgen Schweikle, Niederhelfenschwil, CH;
Federico Innerebner, Zürich, CH;
Andreas Christel, Zuzwil, CH;
Achim-Philipp Sturm, Niederuzwil, CH;
Jürgen Schweikle, Niederhelfenschwil, CH;
Buhler AG, Uzwil, CH;
Abstract
The invention relates to a multi-shaft extruder for the continuous treatment and/or processing of bulk material, especially a powdery, granular or flocculent product, comprising a plurality of shafts () which are arranged in a crown-like manner in a cavity () of an extruder housing (), said shafts extending parallel to the axial direction (A) of the extruder and forming an inner processing chamber () inside the crown, and an outer processing chamber () outside the crown. Each shaft carries a number of axially successive processing elements (), at least part of the same being elements () having a transporting effect, and with which adjacent shafts engage in a sealed manner at least in partial regions. At least one transporting endless screw element () comprising at least one transporting screw thread () is placed in the region of the supply opening () in the extruder housing (), and does not engage in a sealing manner in at least one partial region along the axial direction (A).