Tokai Rubber Industries, Ltd.

Eiji Yasui

Kenichi Ohkuwa

Tsukasa Fujita

Kazunori Toyama

A toner supply roll free from occurrence of an imaging failure. The toner supply roll comprises a shaft () and a urethane foam layer () provided on an outer peripheral surface of the shaft (), wherein when the urethane foam layer is compressed to a depth of 1 mm from an outermost surface thereof during compression thereof to a depth of 2 mm, a stress Foccurs in the urethane foam layer and when the urethane foam layer is decompressed to a depth of 1 mm after the compression thereof to a depth of 2 mm, a stress Foccurs in the urethane foam layer, the urethane foam layer satisfies a relation represented by the following expression (1) at a temperature of 23&#xb1;3&#xb0; C. at a humidity of 50&#xb1;10%:&#x2267;0.7&#x2003;&#x2003;(1)the stresses Fand Fbeing expressed by a unit of Pa.

Toner supply roll

A plastics endless belt for electrophotography having a multilayer structure including a developing agent-supporting layer, wherein the developing agent-supporting layer comprises a material consisting essentially of a silicone resin or a material consisting essentially of a fluorine-modified acrylic resin, and a conductive agent is contained in at least one layer other than the developing agent-supporting layer.

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Nakashima-gun, Japan

Eiji Yasui