Method and device for making blind grooves in an unvulcanized tread
US9511557B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 8, 2010 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Jan 31, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D30/68
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Method of manufacturing a tire comprising a tread strip in which blind radial cuts are arranged in the blocks of rubber that form the tread pattern, comprising a step during which the cuts (33) are made in the unvulcanized tread strip (3) intended to cap the green tire. One or more blades (22) are raised to a temperature higher than the vulcanization temperature of the material of which the tread strip (3) is made are caused to penetrate the radially internal face (32) of the tread strip (3) for a sufficient period of time that they superficially vulcanize the walls of the cut in contact with the blade (22) so as to prevent the faces from sticking back together once the blade has been withdrawn from the cut.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.