Method for forming stratified rubber article with variable cure rate
US9701081B2 · kind B2 · utility
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1Claims
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Key dates
| Filing date | Nov 19, 2010 |
| Grant date | Jul 11, 2017 |
| Priority date | — |
| Expiry date | Dec 29, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7102
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of forming a tread comprising two or more layers of rubber is described. The method includes the steps of: extruding a rubber compound through an extruder and a gear pump and mixing with an accelerant and then applying a continuous strip of rubber directly onto a tire building machine to form a first layer of rubber having a first cure rate; adjusting the amount of accelerant to obtain a second cure rate different than said first cure rate, and then applying a strip of rubber having a second cure rate onto the tire building machine, wherein one of the cure rates is faster than the other cure rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.