Patent ID: 9701081
Date: 2017-07-11
CPC Classifications: B29B,B29C,B29D,B29K,B29L

Claim:
1. A method of forming a tread comprising two or more layers of rubber, the method comprising the steps of: extruding a rubber compound through a first extruder and a first gear pump; extruding an accelerant through a second extruder and a second gear pump and then into the first extruder for mixing the rubber compound with the accelerant, and then applying one or more first strips of a rubber mixture having a first cure rate from the output of the first gear pump directly onto a tire building machine; adjusting the amount of accelerant to obtain a second cure rate different than said first cure rate, and then applying one or more second strips of rubber mixture having a second cure rate directly onto the tire building machine, wherein one of the cure rates is faster than the other cure rate.