Toner supply roller
AssigneeNitto Kogyo Co., Ltd.
InventorsMasayuki Nakashima, Toru Nishino, Takeo Taniguchi, Ikuo Nishiyama
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Abstract
A toner supply roller comprises a metallic core shaft and an electrically conductive elastic layer formed to surround the outer surface of the shaft. The conductive elastic layer is formed of open-cell polyurethane foam. The polyurethane foam is impregnated with an electrically conductive polymer and a binder.
Claims11
A toner supply roller comprising a core shaft and an electrically conductive elastic layer formed on a outer peripheral surface of the shaft, the conductive elastic layer comprising an open-cell polyurethane foam, wherein an electrically conductive polymer and a binder are attached to cell walls of the polyurethane foam.
A method of manufacturing a toner supply roller, comprising impregnating a block of polyurethane foam with an impregnating solution containing an electrically conductive polymer and a binder so as to permit the conductive polymer and the binder to be attached to cell walls of the polyurethane foam, followed by drying the impregnated polyurethane foam;
- inserting a core shaft into the block of dried polyurethane foam;
- and polishing the outer surface of the block of polyurethane foam so as to form a circumferential surface.
Dependencies are inferred from the claim text.