| 摘要 |
PURPOSE:To improve windability, fixability and image characteristic by providing an elastic layer and resin layer as a release layer on a mandrel material of a heating roller and confining the sum of the heat resistances of the elastic layer and the release layer to <=1.1cm.sec.degree/calory. CONSTITUTION:A heating roller 3201 and a press roller 3202 are provided to a fixing device 32 and the roller 3202 is brought into pressurized contact with the roller 3201 by a pressurizing means at the time of fixing. The roller 3201 is formed by providing a heat-resistant elastic material such as silicone rubber onto the outside peripheral face of the hollow cylindrical metallic roller mandrel material consisting of aluminum, etc., and further, providing the heat-resistant elastic material layer consisting of PTFE, etc., as the release layer thereon. The sum of the heat resistances of the elastic layer and the release layer is confined to <=1.1cm.sec.degree/calory by adequately selecting the thicknesses of the elastic layer and the release layer. The sheet winding characteristic, fixability and image characteristic are thereby improved. |
