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公开(公告)号：US5121145A
公开(公告)日：1992-06-09
申请号：US562528
申请日：1990-08-03
IPC分类号： G03G15/01
CPC分类号： G03G15/011 , G03G15/0152 , G03G15/0163 , G03G2215/0158 , G03G2215/017
摘要： An optical encoder monitors linear CCD elements as an edge of a perforation or other optical indicia passes along the elements. A line printhead is actauted at least one in response to each new element being activated. The device is particularly useful in a color nonimpact printer in which multiple images are superimposed by line printing, preferably at printheads at a plurality of locations, to create multicolor images.
摘要翻译： 光学编码器监视线性CCD元件，因为穿孔的边缘或其他光学标记沿着元件传递。 响应于每个新元件被激活，行打印头至少起作用。 该装置在彩色非冲印打印机中特别有用，其中多个图像通过行打印叠加，优选地在多个位置处的打印头处叠加，以产生多色图像。
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公开(公告)号：US6153888A
公开(公告)日：2000-11-28
申请号：US188640
申请日：1998-11-09
CPC分类号： G03G15/65 , B65H7/125 , B65H2511/51 , B65H2511/515 , B65H2513/514 , B65H2515/60 , B65H2515/704 , B65H2553/414 , B65H2553/416 , B65H2557/23 , B65H2557/61 , G03G2215/00616 , G03G2215/00721
摘要： A control system for an optical sheet sensor device, including at least one light emitter and at least one light detector associated therewith for sensing a sheet in a sheet travel path for automatically controlling the sheet sensor device in order to provide an intensity of light from the light emitter to compensate for varying background reflectance and background-to-light emitter distance. The control provided for determining a light emitter current level corresponding to an operating condition where a sheet is known to be absent from the sheet travel path and where there is a close, reflective background to the light emitter. A light emitter current operating level corresponding to a reduced level with respect to the above determined current level is stored. A current startup error level at a preset amount off-set from the stored current level is determined. Current is applied to a light emitter, the applied current being increased toward a level at which the threshold level for the light detector is exceeded. The instantaneous applied current level is compared with the determined startup error current level, and an error signal is provided when the light intensity threshold is reached prior to the applied current level exceeding the determined current level. If the determined startup error current level is exceeded by the applied current level prior to the light intensity reaching the light intensity threshold, the light emitter is operated at the applied current level.
摘要翻译： 一种用于光学片传感器装置的控制系统，包括至少一个光发射器和与其相关联的至少一个光检测器，用于感测片材行进路径中的片材，用于自动控制片材传感器装置，以便提供来自 光发射器以补偿不同的背景反射率和背景到光发射器距离。 该控制被提供用于确定对应于工作条件的光发射器电流水平，其中已知片材不存在于片材行进路径中，并且其中光发射器具有接近的反射背景。 存储对应于相对于上述确定的电流电平的降低电平的发光器电流工作电平。 确定从存储的当前级别偏移的预设量的当前启动错误级别。 电流被施加到光发射器，施加的电流被增加到超过光检测器的阈值电平的水平。 将瞬时施加的电流电平与确定的启动误差电流电平进行比较，并且在施加的电流水平超过确定的电流水平之前达到光强度阈值时提供误差信号。 如果在光强达到光强度阈值之前所施加的电流水平超过确定的启动误差电流水平，则光发射器在施加的电流水平下操作。
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公开(公告)号：US5194896A
公开(公告)日：1993-03-16
申请号：US827298
申请日：1992-01-29
IPC分类号： G03G21/14
CPC分类号： G03G21/145
摘要： A brake for a sprocket-optical encoder assembly associated with an electrophotographic copier consists of a metal disc positioned in a magnetic field, mounted on a common shaft with the sprocket driving an optical encoder. The teeth of the sprocket are engaged in perforations in the photoconductor film belt of the copier, and the sprocket and the shaft, together with the disc and encoder are, therefore, driven by movement of the film. As the disc is caused to rotate in the magnetic field, eddy currents are generated therein which resist the rotation. Such resistance acts as a brake on the sprocket, causing the trailing edge of its teeth to maintain contact with the trailing edge of the perforations, thereby avoiding back and forth movement of the teeth within the perforations and consequential destructive impacts with the edges thereof.
摘要翻译： 与电子照相复印机相关联的链轮光学编码器组件的制动器由位于磁场中的金属盘组成，其安装在公共轴上，链轮驱动光学编码器。 链轮的齿啮合在复印机的感光体膜带中的穿孔中，因此，链轮和轴与盘和编码器一起被膜的移动驱动。 当磁盘在磁场中旋转时，在其中产生抵抗旋转的涡流。 这种阻力用作链轮上的制动器，导致其齿的后缘与穿孔的后缘保持接触，从而避免了穿孔内的齿的前后运动以及与其边缘相应的破坏性冲击。
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公开(公告)号：US5966296A
公开(公告)日：1999-10-12
申请号：US671461
申请日：1996-06-27
CPC分类号： G03G15/0283 , G03G15/0291
摘要： A power supply adapted for use with a corona charger. The power supply includes a first DC power source providing an electrical potential above a predetermined reference potential, and a second DC power source providing an electrical potential below such predetermined reference potential. A main circuit having an output adapted to be connected to a corona charger, includes a switching circuit for selectively turning the first and second DC power sources on and off in a manner so as to provide a an electrical potential having an AC waveform output for the main circuit.
摘要翻译： 适用于电晕充电器的电源。 电源包括提供高于预定参考电位的电势的第一DC电源和提供低于该预定参考电位的电位的第二DC电源。 具有适于连接到电晕充电器的输出的主电路包括用于选择性地使第一和第二DC电源接通和断开的开关电路，以便提供具有AC波形输出的电位 主电路
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