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:
Sep. 18, 1990
Filed:
Aug. 29, 1989
Applicant:
Inventor:
Paul Meyer, Locarno-Muralto, CH;
Assignee:
Frenkel C-D Aktiengesellschaft, Vaduz, LI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B28C / ;
U.S. Cl.
CPC ...
366 76 ; 366 85 ; 366 90 ; 366324 ;
Abstract
The increasingly high standards of consistency and uniformity demanded of cold feed rubber extruders are met by providing notches in the flights of the screw at least in the feed-inlet of the extruder. The notches are at a lead-angle greater than that of the extruder screw flights, so to pull the rubber and advance it positively. Throttling means are used to adjust the amount of squash-back and there is an independently variable-speed drive for a feed roller in the feed inlet.