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. 11, 1983
Filed:
Nov. 09, 1981
Applicant:
Inventor:
Wilhelm Hanslik, Vienna, AT;
Assignee:
American Maplan Corporation, McPherson, KS (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29B / ;
U.S. Cl.
CPC ...
366 83 ; 366 88 ; 366 89 ; 366 91 ; 366 97 ; 366290 ; 366296 ;
Abstract
A double-worm press, especially an extrusion or plastifying press for thermoplastic materials and particularly high viscosity thermoplastics, has generally conical worms, at least the discharge zones of which are formed so that the material is treated generally adiabatically therein. For this purpose, the end of the discharge zone has a depth of the worm flight which is between 24 and 33% of the worm diameter, preferably between 26 and 30%, with the ratio of the depth of the flight (or height) to the diameter of the worm increasing progressively away from the discharge end, counter to the direction of feed of the material.