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:
Mar. 29, 1994
Filed:
Sep. 14, 1992
Gerd Capelle, Langenhagen, DE;
Hermann Berstorff Maschinenbau GmbH, Hannover, DE;
Abstract
The invention relates to an apparatus for producing a controllable, uniform conveying pressure for processing highly viscous, temperature sensitive rubber or thermoplastics material. The apparatus includes two rotating conveying elements that conjointly form a tooth-like sealing profile and that are arranged on respective shafts in a housing. The root circle diameters of the conveying elements more or less correspond to the diameters of the shaft sections axially adjacent to the conveying elements. For this reason, the radial end faces of the conveying elements are avoided and so are the difficult sealing problems which would otherwise be present at these end faces. The shaft sections adjacent the conveying elements guide and keep the toothed profiles in alignment with each other as they rotate to convey the material.