Thermal valve pin
CA 1086014 A · Owner: Gellert, Jobst Ulrich · Inventors: Gellert, Jobst U.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to an improved valve pin for a valve gating injection molding system. Heat transfer to the gate area is extremely critical in valve gating systems and this is even more so when new high density glass filled materials are being molded. Thus it is necessary to provide substantially increased and more uniform heat transfer to the gate area. Accordingly, the invention provides an improved valve pin having at least a portion of the valve pin adjacent the tip end being formed of an elongated hollow sealed tube which which contains a vapourizable fluid under a partial vacuum. The back end of the tube receives heat from the surrounding heater cast to vapourize the fluid in …
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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 September 23, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 23, 1997.
- 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.