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. 07, 2009
Filed:
Oct. 19, 2005
Andreas Limper, Freudenberg, DE;
Harald Keuter, Hamburg, DE;
Maik Rinker, Gummersbach, DE;
Dieter Berkemeier, Steinebach/Sieg, DE;
Andreas Limper, Freudenberg, DE;
Harald Keuter, Hamburg, DE;
Maik Rinker, Gummersbach, DE;
Dieter Berkemeier, Steinebach/Sieg, DE;
Harburg-Freudenberger Maschinenbau GmbH, Hamburg, DE;
Abstract
An internal mixer for kneading plastic materials, particularly synthetic materials, caoutchouc or rubber mixtures includes a housing with a mixing chamber, two rotors which are driveable in opposite directions and are arranged in the mixing chamber with parallel axes. The rotors have non-meshing rotor bodies, wherein each rotor body has four helically mixing wings which at one end thereof define a front passage to the corresponding front wall of the housing. Each rotor body has for helically extending mixing wings which are successively oppositely arranged on the circumference, wherein the mixing wings extend at least over half the axial length of the mixing chamber, and wherein the mixing wings define at one end thereof a front passage to the corresponding front wall of the housing.