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. 12, 1985
Filed:
May. 06, 1983
Siegfried Titz, Hennef, DE;
Matthias Langel, Troisdorf-Spich, DE;
Waldemar Wissinger, Siegburg, DE;
Josef Kurth, Troisdorf, DE;
Dynamit Nobel Aktiengesellschaft, Troisdorf, DE;
Abstract
A die, associated with an extruder and provided with an inwrought flow channel with displacement cores for shaping a plasticized synthetic resin bulk stream into a profile cross-section with hollow chambers, has a die housing that is composed of several die members with vertical and/or horizontal mold joints. The displacement cores in the flow channel are connected to the die housing by core-holding webs that separate the flow channel by distances corresponding to the thicknesses of the webs, thus subdividing the bulk stream into separate partial streams, the cross-section of the combined partial streams being equal to the cross-section of the bulk stream, and the displacement cores being enlarged by the thickness of the core-holding webs so that the partial streams, with the flow cross-sections remaining the same, are conducted along the core-holding webs.