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:
Aug. 20, 1996
Filed:
Apr. 12, 1995
Applicant:
Inventors:
Heinz Caspelherr, Koln, DE;
Ulrich Huwel, Koln, DE;
Assignee:
Klockner-Humboldt-Deutz AG, Koln, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B01F / ;
U.S. Cl.
CPC ...
366146 ; 366147 ; 165 87 ; 219523 ;
Abstract
A preheating screw for the simultaneous mixing and heating of fine-grained or paste-like substances, in which intensive heat transfer takes place during transport of the substance by use of a rotating hollow screw that is filled with a heat-transfer medium, preferably a fluid, heat being transfered from the heat-transfer medium to the product by way of the heated hollow screw. An electrical heating device is installed in a hollow screw shaft, and is supplied with electrical energy via sliding contacts positioned on the outside of the screw shaft.