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. 15, 2003
Filed:
Mar. 22, 2000
Siegfried Chszaniecki, Hannover, DE;
Berstorff GmbH, Hannover, DE;
Abstract
An underwater pelletizer for granulating thermoplastics, includes an extruder having a die plate with holes for extruding thermoplastics in the form of single strands which are cut by a rotating cutting tool in short pieces in a cutting plane in parallel relation to an exit plane of the die plate, thereby forming a granulated product. The exit plane of the die plate and the cutting tool are positioned in a chamber which is filled with cooling water streaming through the chamber. The chamber has a cooling water inlet, which is arranged above the pivot axis of the cutting tool, and an outlet, arranged beneath the pivot axis of the cutting tool, for discharge of a mixture of water and granulated product, whereby the outlet is configured as free discharge opening which opens into a separator, positioned immediately underneath the outlet, for separating the granulated product from the cooling water.