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    • 1. 发明授权
    • Highlight color imaging apparatus
    • 突出显示彩色成像设备
    • US4868608A
    • 1989-09-19
    • US140456
    • 1988-01-04
    • William M. Allen, Jr.Delmer G. ParkerHoward M. Stark
    • William M. Allen, Jr.Delmer G. ParkerHoward M. Stark
    • G03G13/01G03G13/09G03G21/00
    • G03G13/09G03G13/013G03G21/0005
    • Tri-Level Highlight color imaging apparatus and cleaner apparatus therefor. Improved cleaning of a charge retentive surface is accomplished through matching the triboelectric properties of the positive and negative toners and their associated carriers as well as the carrier used in the magnetic brush cleaner apparatus. The carrier in the cleaner upon interaction with the two toners causes them to charge to the same polarity. The carrier used in the cleaner is identical to the one use in the positive developer. The carrier of the negative developer was chosen so that the toner mixed therewith charged negatively in the developer housing.Thus, the combination of toners and carriers is such that one of the toners charges positively against both carriers and the other of the toners charges negatively against one of the carriers and positively against the other. Due to the application of a positive pretransfer corona both the toners are positive when they reach the cleaner housing and because the carrier employed causes both of the toners to charge positively, toner polarity reversal is precluded.
    • 三层高亮度彩色成像设备及其清洁设备。 充电保持性表面的改进的清洁是通过匹配正和负色调剂及其相关载体的摩擦电性质以及在磁刷清洁器装置中使用的载体来实现的。 与两个调色剂相互作用时,清洁剂中的载体使它们以相同的极性充电。 清洁剂中使用的载体与正极显影剂中使用的载体相同。 选择负极显影剂的载体,使得与其混合的调色剂在显影剂外壳中呈负电荷。 因此,调色剂和载体的组合使得其中一种调色剂对两种载体均具有积极作用,而另一种调色剂对载体之一产生负面影响并且与另一种载体正相反。 由于使用了正面的预转印电晕,所以当调色剂到达清洁器壳体时,调色剂是正的,并且由于使用的载体导致两种调色剂均正向充电,否则调色剂极性反转被排除。
    • 7. 发明授权
    • Ramped developer biases
    • 猖狂的开发商偏见
    • US4761672A
    • 1988-08-02
    • US78750
    • 1987-07-28
    • Delmer G. ParkerJerome E. MayWilliam M. Allen, Jr.
    • Delmer G. ParkerJerome E. MayWilliam M. Allen, Jr.
    • G03G15/01G03G15/06G03G15/08
    • G03G15/0121G03G15/065G03G15/08
    • Undesirable transient development conditions that occur during start-up and shut-down in a tri-level xerographic systemw when the developer biases are either actuated or de-actuated are obviated by using a control strategy that relies on the exposure system to generate a spatial voltage ramp on the photoreceptor during machine start-up and shut-down. Furthermore, the development systems' bias supplies are programmed so that their bias voltages follow the photoreceptor voltage ramp at some predetermined offset voltage. This offset is chosen so that the cleaning field between any development roll and the photoreceptor is always within reasonable limits. As an alternative to synchronizing the exposure and developing characteristics, the charging of the photoreceptor can be varied in accordance with the change of developer bias voltage.
    • 通过使用依赖于曝光系统产生空间电压的控制策略来消除在三级静电复印系统中的启动和关闭期间发生的不期望的瞬态发展条件,当显影剂偏压被启动或去激活时, 在机器起动和停机期间,光感受器上的斜坡。 此外,开发系统的偏置电源被编程,使得它们的偏置电压在某个预定的偏移电压下跟随感光体电压斜坡。 选择该偏移使得任何显影辊和感光体之间的清洁场总是在合理的限度内。 作为同步曝光和显影特性的替代方案,可以根据显影剂偏压的变化来改变感光体的充电。