Sprue gated stack injection molding system
CA 1265908 C · Owner: Gellert, Jobst Ulrich · Inventors: Gellert, Jobst Ulrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stack injection molding system for conveying melt from an upstream heated nozzle seated in a fixed mold platen to an aligned downstream heated nozzle in a movable mold platen. The upstream and downstream nozzles each have a nose portion with a forward face which abuts against each other in the parting line in the closed position. The melt passage extends through aligned central melt bores in the nozzles which taper inwardly adjacent the forward faces to form a sprue gate where they join. While both nozzles have an integral electrical heating element, only the heating element of the upstream nozzle has a circular forward portion which is brazed in the nose portion to encircle the melt bore …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted February 20, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 20, 2007.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.