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:
Oct. 14, 1986
Filed:
Aug. 27, 1982
Heinz Mewes, Troisdorf-Spich, DE;
Wilhelm Nachtigall, Troisdorf-Eschmar, DE;
Michael Wienand, deceased, late of Siegburg, DE;
by Anneliese Wienand, legal representative, Siegburg, DE;
by Hans-Jurg Wienand, heir, Siegburg, DE;
by Michael Wienand, heir, Krefeld, DE;
by Rudolf Wienand, heir, Siegburg, DE;
by Karl Wienand, heir, Siegburg, DE;
by Elisabeth Wienand, heir, Krefeld, DE;
Dynamit Nobel Aktiengesellschaft, Troisdorf, DE;
Abstract
An improved process for incorporating glass fibers into a thermoplastic synthetic resin wherein the glass fibers are continuously mixed with a molten thermoplastic synthetic resin and the resulting mixture is shaped into a desired article, involves preheating the glass fibers to a temperature not more than the melting point of the synthetic resin, feeding the preheated glass fibers and the molten synthetic resin separately to a premixing chamber, intermixing the resin and fibers within the chamber and thereafter introducing the resultant premix continously and directly into a two-stage degasifying screw-type extruder for effecting further homogenization of the premix and for extruding the desired article. The two-stage degasifying screw-type extruder used for carrying out this process is provided with a screw having a constant screw pitch in the two stages and in each stage with a low pressure zone and a high pressure zone in succession.