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. 09, 2006
Filed:
Jul. 09, 2001
Federico Innerebner, Zürich, CH;
Achim Philipp Sturm, Oberuzwil, CH;
Jürgen Schweikle, Niederhelfenschwil, CH;
Federico Innerebner, Zürich, CH;
Achim Philipp Sturm, Oberuzwil, CH;
Jürgen Schweikle, Niederhelfenschwil, CH;
Buhler AG, Uzwil, CH;
Abstract
The invention relates to a multi-screw extruder for the continuous treatment and/or processing of a bulk material, especially a product in powder, granular or flake form, comprising several shafts () which are arranged in a ring shape in a cavity () of an extruder housing () and which extend parallel to the axial direction (A) of the extruder. The extruder housing () is provided with axially parallel, concave segments () of a circle on the radially inner () and radially outer () surfaces of the cavity (). These circle segments act as a guide for the axially parallel shafts () with their processing elements () on the inside () or on the outside () of the shaft ring (, . . . ). The inventive improvement lies in the radial extension of the axial partial area of the cavity () containing the shafts (), which is located in the area of the feed opening (), this radial extension () extending along part of the shaft ring (, . . . ) in the peripheral direction (U) of the same.