Patent ID: 9383699
Filing Date: 2016-07-05
CPC Classification: B29C,B29K,B29L,G03G

Claim Text:
1. A method for producing a fixing pressure roller for being employed in a fixing unit of a fixing device, the fixing pressure roller comprising a core, and an elastic layer provided around the core, wherein the method comprises steps of: mixing a silicone rubber raw material with resin microballoons and water to thereby prepare a silicone rubber composition; charging the silicone rubber composition around the core placed in a mold; curing the silicone rubber composition to form a silicone rubber product containing the resin microballoons and water; and applying pressure to the silicone rubber product to break the resin microballoons contained therein to provide voids where the resin microballoons had been located, and to overheat the water to form water vapor that promotes carbonization of the broken resin microballoons, wherein adjacent said voids communicate with one another, so that the silicone rubber product includes therein voids to form the elastic layer provided around the core.