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:
May. 21, 1991
Filed:
Jun. 05, 1989
Applicant:
Inventors:
Assignee:
Pluss-Staufer AG, , CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29B / ;
U.S. Cl.
CPC ...
366 82 ; 366 89 ;
Abstract
In a method for processing granulate and/or pulverulent polymer with pulverulent additives in an injection moulding machine having a screw with a feed zone of constant screw core diameter, and intermediate zone with a compression and metering section and a mixing element array, with regard to particularly economic processing to high quality injection mouldings the polymer and the pulverulent additives are introduced without previous preparation directly into the feed zone of the screw and in the feed zone the polymer is thoroughly mixed with the pulverulent additives at least twice by means of mixing element arrays, the working length of the screw for the processing having at least 19 times the screw diameter.