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:
Jun. 24, 2008
Filed:
Oct. 15, 2004
Jeffrey D. Macdonald, North York, CA;
Alireza Mortazavi, Richmond Hill, CA;
Denise Craig, Toronto, CA;
Robert Ilmonen, Mississauga, CA;
Geoffrey Gow, Palgrave, CA;
Jeffrey D. MacDonald, North York, CA;
Alireza Mortazavi, Richmond Hill, CA;
Denise Craig, Toronto, CA;
Robert Ilmonen, Mississauga, CA;
Geoffrey Gow, Palgrave, CA;
Husky Injection Molding Systems Ltd., Bolton, Ontario, CA;
Abstract
The present invention provides an improved extruder assembly, that includes a wiper for wiping a screw portion in a low pressure extruder stage, whereby the wiping of the screw portion improves melt conveyance through the low pressure extruder stage. The present invention has particular utility when used in a low pressure venting and entrainment extruder stage of a single screw compounding extruder. The present invention also provides an extrusion/injection unit for use in-line compounding molding system that incorporates the improved extruder assembly.