Heater cast
CA 1070072 A · Owner: Gellert, Jobst U. · 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 heater cast used in multi-cavity hot runner edge gate injection molding. The improved heater cast enables products to be molded of considerably lower heights than was previously the case and as well facilitates the molding of difficult heat sensitive material such as PVC, polycarbonate, polyester and acetal resins. The improved heater cast has a cylindrical mid portion with four spaced cylindrical lower nozzle portions extending downwardly around the periphery therefrom. The hot melt flows downwardly from the molding machine, through a central injection passage in the heater cast and branches into four injection passage extensions to the respective …
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
- Granted January 22, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 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.