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. 15, 1990
Filed:
Aug. 16, 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
Valve means for use in a co-injection nozzle of a multi-polymer injection molding or blow-molding machine wherein the nozzle has an axial or cylindrical central channel, comprised of an elongated sleeve having an axial central passageway and a port in its side wall and axially-reciprocable within the nozzle central channel, and, either a solid pin within and fixed relative to the sleeve, or, more preferably, an elongated pin axially-reciprocable within the sleeve central passageway, the sleeves and pins each mounted in close tolerance slip fits to prevent any significant accumulation or passage of polymer melt material.