Electroconductive elastic sponge member

DETAILED DESCRIPTION It is accordingly a principal object of this invention to provide an improved electroconductive elastic sponge member having an electrical resistivity in the range of 10.
sup.
2 to 10.
sup.
6 ohm/cm.
It is another object of this invention to provide an electroconductive elastic sponge member of fine pliability and compression restorability.
It is another object of this invention to provide an electroconductive elastic sponge member with its electrical resistivity variable in accordance with a change in compressibility.
It is still another object of this invention to provide a novel electroconductive elastic sponge member for use in the image transfer section of an electrophotographic copying machine.
Pursuant to the present invention, the above and other objects are accomplished by the provision of a novel electroconductive elastic sponge member comprising a base material of a soft foam temporarily swellable or expandable by alcohol and an electroconductive coating formed by incorporating in the base material an additive electroconductive agent containing a suitable mixture of a water dispersable, that is, a water soluble or emulsifying binding resin, a fine electroconductive powder and alcohol.
For a fuller understanding of the nature and objects of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings.