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:
Aug. 07, 1990
Filed:
Aug. 22, 1989
Frederick G Kudert, Niles, IL (US);
Maurice G Latreille, Batavia, IL (US);
Robert J McHenry, St. Charles, IL (US);
George F Nahill, Crystal Lake, IL (US);
Henry Pfutzenreuter, III, Alta Loma, CA (US);
William A Tennant, Schaumburg, IL (US);
Thomas T Tung, Hoffman Estates, IL (US);
John Vella, Jr, Aurora, IL (US);
American National Can Company, Chicago, IL (US);
Abstract
Multi-co-injection nozzle injection molding apparatus for an injection molding machine for injection molding a multi-layer plastics article or container, comprising a plurality of co-injection nozzles, means associated with the nozzles to channel each material stream which is to form a layer of the article separately to each nozzle, means for moving the materials streams along their respective channels to their respective nozzles and means for combining in each nozzle the streams moved thereto, to form combined streams in the nozzles for injection into associated injection mold cavities. Each of the channels preferably provide substantially the same material flow stream travel path for each material stream of the same material channeled to each nozzle. Each co-injection nozzle has an axial central channel and a plurality of flow stream passageways with orifices in communication with the central channel. Preferably, valve means are cooperatively associated with and operative within each co-injection nozzle for there preventing and allowing the flow of respective materials streams from the passageway orifices into the central channel.