Patent ID: 6293895
Filing Date: 2001-09-25
Classification: B41N,F16C,G03G

Abstract:
A transfer roller comprising:a metal shaft;a rubber roller formed around the shaft, said rubber roller being sponge-like and electrically conductive, and containing a low-molecular material; anda resin tube having a lower resin layer formed on said rubber roller and an upper resin layer formed on said lower resin layer;wherein one of the upper resin layer and the lower resin layer has carbon black added thereto so as to increase a density of the one resin layer, thereby providing the one resin layer with a higher sealing effect than the other of the upper resin layer and the lower resin layer so that the low-molecular material is prevented from penetrating through the one resin layer, and the other of the upper resin layer and the lower resin layer has an organic ion electrically conductive material added thereto so as to provide the other resin layer with a higher stability of electrical resistance than the one of the upper resin layer and the lower resin layer.