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公开(公告)号：US09772576B1
公开(公告)日：2017-09-26
申请号：US15151727
申请日：2016-05-11
CPC分类号： G03G15/04054 , B41J2/45 , B41J2/451 , G03G15/04045 , G03G15/0409 , G03G15/326 , G03G2215/0409 , H04N1/02409
摘要： A focus adjustment mechanism for adjusting a focus position of a printhead includes a rotatable pin that is rotatable around a pin axis. The rotatable pin includes a cam section located having a surface whose radial distance from the pin axis varies around its perimeter, and a gripping feature. An adjustment plate includes a gripping feature and is adapted to fit over and engage with the gripping feature of the rotatable pin such that the adjustment plate rotates together with the rotatable pin. A fastener fastens the adjustment plate to a support structure when the adjustment plate is positioned in a desired orientation. The printhead includes a frame feature which is pulled firmly against the cam section of the rotatable pin such that as the rotatable pin is rotated the frame feature rides on the surface of the cam section thereby adjusting the focus position of the printhead.
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公开(公告)号：US11829084B2
公开(公告)日：2023-11-28
申请号：US17952392
申请日：2022-09-26
IPC分类号： G03G15/01
CPC分类号： G03G15/0131 , G03G15/0152 , G03G2215/00042 , G03G2215/0161
摘要： An electrophotographic printing system for printing with a set of toners including a white toner. A plurality of printing modules are configured to print respective toner patterns, each including a toner image printed onto a receiver medium being transported on a transparent transport web and a corresponding registration mark positioned outside a border of the receiver medium. A first registration mark sensing system is positioned to detect the registration marks printed with a first subset of the toners that doesn't include the white toner. A second registration mark sensing system is positioned to detect the registration marks printed with a second subset of the toners that includes the white toner. The registration mark sensing systems each include a reflector plate positioned behind the transport web. The reflector plate for the first registration mark sensing system is white, and the reflector plate for the second registration mark sensing system is black.
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公开(公告)号：US20210073602A1
公开(公告)日：2021-03-11
申请号：US16564255
申请日：2019-09-09
摘要： A digital printing system having a linear printhead includes corrections for in-track position errors. A data processing system implements a method for determining an in-track position function which includes printing a test target including a plurality of alignment marks, automatically analyzing a captured image of the printed test target to determine a measured in-track position for each of the alignment marks, comparing the measured in-track positions for the alignment marks to reference in-track positions to determine measured in-track position errors, and determining an in-track position correction function responsive to the measured in-track position errors. The in-track position correction function specifies in-track position corrections to be applied as a function of cross-track position. A corrected digital image is determined by resampling an input digital image responsive to the in-track position correction function.
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公开(公告)号：US11138482B2
公开(公告)日：2021-10-05
申请号：US16564255
申请日：2019-09-09
摘要： A digital printing system having a linear printhead includes corrections for in-track position errors. A data processing system implements a method for determining an in-track position function which includes printing a test target including a plurality of alignment marks, automatically analyzing a captured image of the printed test target to determine a measured in-track position for each of the alignment marks, comparing the measured in-track positions for the alignment marks to reference in-track positions to determine measured in-track position errors, and determining an in-track position correction function responsive to the measured in-track position errors. The in-track position correction function specifies in-track position corrections to be applied as a function of cross-track position. A corrected digital image is determined by resampling an input digital image responsive to the in-track position correction function.
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公开(公告)号：US11106954B2
公开(公告)日：2021-08-31
申请号：US16564235
申请日：2019-09-09
IPC分类号： G06K15/02 , B41J2/525 , G06K15/12 , B41J2/45 , G06T7/73 , G06T7/00 , H04N1/00 , H04N1/10 , H04N1/193 , H04N1/58 , H04N1/60 , H04N1/29 , H04N1/387 , H04N1/50 , H04N1/053 , B41J29/393
摘要： A method for correcting in-track position errors in a digital printing system having a linear printhead includes printing a test target including a plurality of alignment marks. A data processing system is used to automatically analyze a captured image of the printed test target to determine a measured in-track position for each of the alignment marks. The measured in-track positions for the alignment marks are compared to reference positions to determine measured in-track position errors. An in-track position correction function is determined responsive to the measured in-track position errors, wherein the in-track position correction function specifies in-track position corrections to be applied as a function of cross-track position. A corrected digital image is determined by resampling an input digital image responsive to the in-track position correction function.
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公开(公告)号：US20170031302A1
公开(公告)日：2017-02-02
申请号：US14814561
申请日：2015-07-31
IPC分类号： B41J2/385
CPC分类号： G03G15/04045 , G03G15/04054 , G03G2215/0141
摘要： A method for preventing contamination of a lens assembly by charged particles on an image bearing surface in an electrophotographic printer includes providing a conductive electrode with an opening adjacent the lens assembly; charging the conductive electrode with a variable voltage power supply; and matching a voltage on the image bearing surface with the variable voltage power supply.
摘要翻译： 一种用于防止电子照相打印机中的图像承载表面上的带电粒子对透镜组件的污染的方法包括：提供具有邻近透镜组件的开口的导电电极; 用可变电压电源为导电电极充电; 并使图像承载面上的电压与可变电压电源匹配。
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公开(公告)号：US20210073601A1
公开(公告)日：2021-03-11
申请号：US16564235
申请日：2019-09-09
摘要： A method for correcting in-track position errors in a digital printing system having a linear printhead includes printing a test target including a plurality of alignment marks. A data processing system is used to automatically analyze a captured image of the printed test target to determine a measured in-track position for each of the alignment marks. The measured in-track positions for the alignment marks are compared to reference positions to determine measured in-track position errors. An in-track position correction function is determined responsive to the measured in-track position errors, wherein the in-track position correction function specifies in-track position corrections to be applied as a function of cross-track position. A corrected digital image is determined by resampling an input digital image responsive to the in-track position correction function.
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