Process and apparatus for injection molding tire treads
CA 1295102 C · Owner: The Goodyear Tire & Rubber Company · Inventors: Majerus, Norbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A viscoelastic fluid molding material (50) is injected into a tire tread cavity (32) between the mold (10) and an inflatable tread supporting body (30). The clearance distance (A) between the mold (10) and the inflatable tread supporting body (30) is varied to increase the flow of the initial amount of fluid molding material (50) into remote portions of the tire tread cavity (32) and provide for the flow of the final amount of fluid molding material (50) into gate portions (52) while the tread supporting body (30) is being deflected. Circumferentially spaced gates (76) may be spaced from the centerplane (20"-20") of the mold (10") and have runners (80) extending toward the shoulders of the …
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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 4, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 4, 2009.
- 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.