Hot runner nozzle
CA 2254629 C · Owner: Gunther Heisskanaltechnik Gmbh · Inventors: Gunther, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hot runner nozzle structure provides insulation to reduce heat transfer to a utilizing tool and to increase accuracy of temperature measurement and control. A shaft foot of extremely low heat conductivity is used to separate a point of contact between a feed tube shaft and the tool. The shaft foot may be formed of titanium for example. An insulating cap of extremely low heat conductivity surrounds the shaft foot in the vicinity of the nozzle tip. The cap may be formed of PEEK or of titanium for example. Gaps may be provided between the insulating cap and shaft foot and/or between the shaft foot and feed tube shaft. In an alternate embodiment having smaller dimensions an insulating ring is …
Read the whole patent
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
- Filed November 30, 1998 and granted October 21, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 2020.
- 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.