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公开(公告)号：US4577197A
公开(公告)日：1986-03-18
申请号：US692260
申请日：1985-01-17
CPC分类号： B41J2/125
摘要： A ink jet printer having a reciprocating printhead with a single jet to print full pages of information on a recording medium by printing contiguous swaths of information. The recording medium is stepped a distance of one swath height after each swath is printed. A height control sensor is located on one side of the recording medium to receive periodically one or more sweeps of test droplets. The height control sensor has upper and lower pairs of photodetectors to detect droplets passing thereby and to produce differential sensing signals which identify the droplet having a trajectory closest to the desired trajectory. By determining the number of droplets between the identified droplets, the interdroplet spacing and drift of the droplet trajectories is monitored. In response to the height control sensor signals, the printer controller with associated circuitry adjusts the operating parameters of the printer to correct and to maintain the desired droplet trajectories and interdroplet spacings.
摘要翻译： 一种喷墨打印机，其具有具有单个喷嘴的往复打印头，以通过打印连续的信息条来在记录介质上打印全页信息。 记录介质在打印每个条纹之后步进一个幅高。 高度控制传感器位于记录介质的一侧，周期性地接收一个或多个扫描液滴。 高度控制传感器具有上和下对光电检测器，以检测由此流过的液滴，并产生识别具有最接近期望轨迹的轨迹的液滴的差分感测信号。 通过确定所识别的液滴之间的液滴数量，监测液滴轨迹的液滴间距和漂移。 响应于高度控制传感器信号，具有相关电路的打印机控制器调节打印机的操作参数以校正并维持所需的液滴轨迹和间隙间距。
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公开(公告)号：US4751517A
公开(公告)日：1988-06-14
申请号：US10100
申请日：1987-02-02
申请人： Peter A. Crean , David B. Feldman
发明人： Peter A. Crean , David B. Feldman
CPC分类号： B41J2/125
摘要： Mounted at every other intersection of the deflection planes of the ink droplets issued by a multi-nozzle printhead of a pagewidth continuous stream ink printer are two-dimensional differential optical sensors. These sensors are located near the printing plane and gutters of the printer and comprise first and second input optical fibers, each having one end coupled to a common light source and the other free ends directing light towards aligned confronting free ends of respective associated pairs of output optical fibers. One of the input fibers and its associated pair of output fibers are inclined with respect to the other, though both input fibers and their associated pair of output fibers are either coplanar or contiguous with the same plane. The opposite ends of the pairs of output fibers are respectively coupled to differential circuits via photodetectors, so that each sensed droplet position may be determined relative to both the droplet deflection plane and the plane perpendicular thereto as the droplet travels along its flight path therepast.
摘要翻译： 安装在由页宽连续流式墨水打印机的多喷嘴打印头发出的墨滴的偏转平面的每隔一个交点处都是二维差分光学传感器。 这些传感器位于打印平面和打印机的沟槽附近，并且包括第一和第二输入光纤，每个具有一个端部连接到公共光源，而另一个自由端将光引向相应的相应输出对的对准的面对的自由端 光纤。 输入光纤及其相关的一对输出光纤之一相对于另一个输入光纤倾斜，尽管输入光纤及其相关联的一对输出光纤与同一平面共面或连续。 输出光纤对的相对端分别通过光电检测器耦合到差分电路，从而当液滴沿其飞行路径行进时，可以相对于液滴偏转平面和垂直于其的平面来确定每个感测的液滴位置。
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