Tuner concentration control apparatus专利检索-平带电位微电子学专利检索查询-专利查询网

Tuner concentration control apparatus

阅读：487发布：2023-05-10

专利汇可以提供Tuner concentration control apparatus专利检索，专利查询，专利分析的服务。并且An apparatus adapted for use in an electrographic magnetic brush development station for maintaining the concentration of toner in the developer mixture at a substantially constant level. Toner concentration is monitored by sampling the self-biasing potential generated by the brush as it periodically contacts uncharged areas of the electrographic recording element. Such potential has been found to be inversely proportional to the concentration of toner in the developer mixture.，下面是Tuner concentration control apparatus专利的具体信息内容。

权利要求

1. In an electrographic copier including means for advancing an electrographic recording element bearing spaced electrostatic charge patterns on a surface thereof past a rotatably mounted magnetic development brush carrying a developer mixture comprising toner and magnetically attractable carrier particles, such brush being electrically connected to ground potential through a resistor of substantial resistance and arranged to continuously contact the surface of the recording element as such element advances along the predetermined path, the improvement comprising: apparatus for maintaining substantially constant concentration of toner particles in the developer mixture carried by the brush, said apparatus comprising means, electrically coupled with the magnetic development brush, for sampling the electrical potential of the brush as the developer mixture carried by the brush periodically contacts portions of the recording element between successive charge patterns, said potential resulting, at least in part, from the triboelectric interaction between the recording element and the developer mixture and being inversely proportional to the concentration of toner particles in the developer mixture.

2. The invention accordance to claim 1 wherein said apparatus further comprises means operatively coupled to said sampling means for activating a toner replenishing device when the sampled potential exceeds a predetermined threshold level.

3. The invention according to claim 1 further comprising an integrating means operatively coupled with said sampling means for accumulating the electrical potential sampled thereby, and means for activating a toner replenishing device when the potential accumulated by said integrating means exceeds a predefined threshold level.

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Tuner concentration control apparatus

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