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. 18, 1998
Filed:
Apr. 15, 1997
Henry J Rozema, Brampton, CA;
Tradesco Mold Limited, Rexdale, CA;
Abstract
A melt ducting arrangement for an injection molding system having a heated nozzle, a valve pin axially slideable in the heated nozzle and a guide bushing for the valve pin which extends into a manifold and of the heated nozzle. The melt ducting arrangement includes a groove in the heated nozzle extending at least part way around the guide bushing. A melt passage extends between the groove and a melt passage in a manifold. The guide bushing has a hole extending generally axially therethrough. The hole has a narrower diameter portion facing away from the heated nozzle and a wider diameter portion facing into the heated nozzle. The narrower diameter portion slideably receives and guides a valve pin. The wider diameter portion provides space to receive melt between the valve pin and the bushing. Radially spaced openings extend through the bushing and register with the groove and to provide a melt conduit between the bushing and the wider diameter portion of the hole.