| 摘要 |
An impression roller with an insulated core, with an outer layer of resilient semiconductive material, and with a set of conductive wires extending along its length and out one end for interconnection, to adjust the resistance of the roller to current being conducted between a first region of higher potential and a second region of relatively lower potential. In a first embodiment the wires are connected by jumper wires while in a second embodiment resistors are connected between the conductive elements to provide further increments in the adjustment of roller resistance. A method is also disclosed for making such a roller.
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