Control of tone reproduction characteristics by time constant of development roller in monocomponent development

The authors describe the relationship between the resistance of a development roller and the development characteristics of a monocomponent development system. To investigate this relationship the authors developed an electric field neutralization model by considering a virtual electrode determined by the time constant of a resistive layer on a development roller. From a simulation model and experimental results, the authors find that the tone reproduction curve for development gamma is strongly dependent on the layer time constant. When the time constant is smaller than the development time, gamma is determined by neutralization of the development electric field. When the time constant is larger than the development time, gamma is determined by a counter charge left on the development roller after toner is deposited on the photoreceptor. It became possible to vary the tone curve over a wide range by the time constant of development roller in monocomponent development.<
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