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. 01, 1979
Filed:
Dec. 02, 1977
USM Corporation, Farmington, CT (US);
Abstract
An extruder machine for processing thermoplastic materials such as low density polyethylene, the extruder incorporating a body having a bore therethrough with a rotor journalled therein and having several mixing and cooling sections set thereon in succession. The mixing sections on the rotor are multiple flighted defining primary and secondary channels having their discharge and entrances respectively blocked or restricted by annular dam arrangements. The bore includes a plurality of annular grooves of symmetrical or non-symmetrical cross-sectional configurations along the axis of the bore which grooves are slightly displaced in the bore with respect to the annular restrictions disposed on the rotor. The rotor, however, is axially displaceable to permit variations in the mixing intensity upon the extrudite being worked, by allowing the annular restrictions on the rotor to be controllably juxtaposed with the annular grooves in the bore of the extruder machine.