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    • 14. 发明授权
    • Lead edge paper curl sensor
    • 引线边缘卷曲传感器
    • US06668155B1
    • 2003-12-23
    • US10202209
    • 2002-07-23
    • Fred F. Hubble, IIITonya L. LoveDaniel A. RobbinsStanley J. Wallace
    • Fred F. Hubble, IIITonya L. LoveDaniel A. RobbinsStanley J. Wallace
    • G03G1500
    • G03G15/6576
    • A sheet curl measurement system and method and an automatic sheet decurling system controlled thereby for the printed paper sheets output of printer. The sheet curl may be remotely sensed without contacting or interfering with the motion of the sheets in their normal sheet path, using a simple but accurate optical sheet curl sensor operating on a portion of the moving sheet at an angle thereto and perpendicularly thereto, with displacement insensitive optics, in both an angular direction substantially parallel to the sheet movement direction and an angular direction substantially transverse to the sheet movement direction, with ratioing of the two output signals.
    • 一种纸张卷曲测量系统和方法以及由此控制的用于打印机的打印纸张输出的自动纸张卷曲消除系统。 使用简单而精确的光学片卷曲传感器可以远程感测纸张卷曲,而不会使纸张在其正常的纸张路径中的运动接触或干扰,该光学片卷曲传感器以与其垂直的角度运动在移动片材的一部分上并具有位移 在两个输出信号的比例方面,基本上平行于纸张移动方向的角度方向和基本上横向于纸张移动方向的角度方向都不敏感。
    • 20. 发明授权
    • Pitch to pitch online gray balance calibration
    • 在线灰度平衡校准的间距
    • US07483186B2
    • 2009-01-27
    • US11428489
    • 2006-07-03
    • R. Enrique ViturroLalit Keshav MesthaJoseph D. HancockTonya L. Love
    • R. Enrique ViturroLalit Keshav MesthaJoseph D. HancockTonya L. Love
    • H04N1/46H04N1/23G03F3/08
    • H04N1/46
    • A printer or other marking engine includes a marking material transfer device, such as a photoreceptor drum or belt, that includes a plurality of pitches. Each pitch receives an individual color of marking material and conveys the marking material to a substrate. The marking engine forms a desired image in a main image area of the substrate using marking material from one or more of the pitches, and produces a target patch pattern for each of the pitches in a margin area located outside the main image area. A measuring device such as a spectrophotometer is used to measure each target patch pattern, and based on the measured values, an individual color calibration is performed for each pitch for use in a subsequent marking operation. The color calibration may include generating or modifying a tone reproduction curve for each pitch based on the measured values. The margin area may be later trimmed off, thereby removing the portion of the substrate on which the target patch pattern is formed.
    • 打印机或其他标记引擎包括包括多个间距的标记材料传送装置,例如感光鼓或皮带。 每个音调接收标记材料的单独颜色,并将标记材料传送到基底。 标记引擎使用来自一个或多个间距的标记材料在基板的主图像区域中形成期望的图像,并且在位于主图像区域外部的边缘区域中产生用于每个间距的目标贴片图案。 使用诸如分光光度计的测量装置来测量每个目标贴片图案,并且基于测量值,对于每个间距执行单独的颜色校准以用于随后的标记操作。 颜色校准可以包括基于测量值产生或修改每个音高的色调再现曲线。 可以稍后修剪边缘区域,从而去除其上形成有目标贴片图案的基板的部分。