Process of molding and vulcanizing a tire
CA 1138161 A · Owner: Michelin & Cie (Compagnie Generale Des Etablissements Michelin) · Inventors: Chateau, Jacques
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process of molding and vulcanizing a tire including the use of an elastic bladder whose axis of revolution coincides with that of the tire and the inflation of which gives the bladder a toroidal shape corresponding to the inside of the tire. The bladder is manufactured in a press having two shells closable on one another along abutting surfaces of the shells to define a molding chamber, and there being a core in said chamber, which core is formed with relief elements on its outer wall. The bladder manufacture is characterized in that vulcanizable rubber is pressed between the shells and core whereby a sleeve is produced having recessed elements in its inner face and a flash on its outer …
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 December 28, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 28, 1999.
- 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.