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    • 24. 发明公开
    • ELECTRONIC PRINTING FOR DISPLAY TECHNOLOGY
    • ELEKTRONISCHEDRÜCKEN在DER ANZEETETECHNIK
    • EP1019787A4
    • 2000-07-19
    • EP97904933
    • 1997-03-04
    • AUSTRALIA RES LAB
    • POCKETT JOHN DAVID
    • B41J2/42B41J2/41B41M1/26G03G11/00G03G15/32G03G15/05G03G13/05
    • G03G15/321B41J2/41G03G11/00
    • A method for electronic printing onto a substrate (1) includes the steps of applying (6) a selected charge pattern to a surface of the substrate (1) to form an electrostatic latent image thereon, applying an electrostatic toner (1) to the surface by means of a donor member (8) to provide a toner image thereon and fixing (12) the toner. An apparatus for electronic printing is also disclosed. The substrate (1) is of a type which will support an electrostatic image on a surface thereof, and may be transparent, translucent, or opaque. The substrate (1) does not have a conductive ground plane affixed to or deposited on its rear surface. During the processing steps of the preferred embodiments, the substrate (1) is held to a conductive ground plane (3) by means of a vacuum system (2).
    • 一种用于在基底(1)上进行电子印刷的方法包括以下步骤:将选择的电荷图案施加(6)到基底(1)的表面上以在其上形成静电潜像,将静电调色剂(1)施加到表面 通过供体构件(8)在其上提供调色剂图像并且将调色剂定影(12)。 还公开了一种用于电子打印的设备。 衬底(1)是将在其表面上支撑静电图像的类型,并且可以是透明的,半透明的或不透明的。 衬底(1)不具有固定或沉积在其后表面上的导电接地平面。 在优选实施例的处理步骤期间,借助于真空系统(2)将衬底(1)保持到导电接地平面(3)。
    • 25. 发明公开
    • PRINTING APPARATUS OF TONER JET TYPE HAVING AN ELECTRICALLY SCREENED MATRIX UNIT
    • 用电动矩阵状的扫描调色剂喷射打印设备
    • EP1018059A1
    • 2000-07-12
    • EP97907530.6
    • 1997-03-11
    • ARRAY PRINTERS AB
    • SUNDSTRÖM, Per
    • G03G15/05G03G15/01G03G15/08B41J2/385
    • G03G15/346B41J2/4155G03G2217/0025
    • Printing apparatus of the type named 'toner jet' printing apparatus, and in which a dry print powder, generally named 'toner' is, by a direct process, transferred from a rotating toner feeder roll (1) which is charged with a certain predetermined, relatively low positive potential (for instance +50 V), through toner feeder bores (8) of a fixed toner matrix (3) in the form of a flexible printing circuit and down to an object (5) to be printed, for instance a paper which is conveyed over a support roll (4) which is charged with a certain predetermined, relatively high potential (for instance +1500 V), and in which the toner which has deposited on the paper (5) is finally fixed on the paper by a heating means (12), and in which each individual toner feeder bore (8) of the matrix (3) is surrounded by an electrically conducting control ring (9) which can alternatively be given a certain positive potential (for instance +300 V) which is higher than the potential of the toner feeder roll (1) but which is lower than the potential of the support roll (4), or a potential which is lower than the potential of the toner feeder roll (1), and in which the matrix (3), at the upper surface thereof has a protective layer (15) of an unmagnetic metal and is formed with through bores (16) having a diameter which is substantially the same as the outer diameter of the control rings (9) of the matrix, and in which the inner diameter of each toner control ring (9) is substantially the same as the diameter of the toner feeder bore (8) of the toner matrix base (13).
    • 30. 发明公开
    • In situ ionographic uniformity correction
    • Korrektur der ionographischenGleichmässigkeit原位。
    • EP0493952A2
    • 1992-07-08
    • EP91311924.4
    • 1991-12-23
    • XEROX CORPORATION
    • Stearns, Richard G.
    • G03G15/05B41J2/415
    • H04N1/401B41J2/415G03G15/323
    • The In Situ Ionographic Uniformity Correction is a method and apparatus which solves the problem of non-uniform density of ion current projected from an ionographic print head (10) caused chiefly by variations in the dimensions of the modulation channel (24). During calibration, the present invention senses ion current (20) using a simplified ion sensor (36) which has an electrode (32), very large in proportion to the width of several modulation electrodes (22). Groups (60), (61) of modulation electrodes (22) are electronically addressed in steps of one modulation electrode (22) each, across the width of the print array (16). To prevent cross-talk from rendering the sensed ion current (20) values unusable, the modulation voltage (Vm(i)) is adjusted by a feedback circuit (42) to achieve a fixed value of ion current (20) for each group (60), (61). Values of this modulation voltage (Vm(i)) are stored in an electronic data file (44). Computation of corrected modulation voltage (Vm(i)') to produce uniform ion current (20), based on average modulation voltage and a print head (10) characteristic constant, is made in a data processor (46) by a programmed algorithm which accesses the data file (44). Corrected values of modulation voltage (Vm(i)') are applied to each correlated modulation electrode (22) through a switching circuit (52). Corrected values of modulation voltage (Vm(i)'), when applied to the correlated modulation electrodes (22), produce ion currents (20) of uniform density and result in uniformity of density in large, grey printed areas.
    • 原位电离均匀性校正是解决由主要由调制通道(24)的尺寸变化引起的离子印刷头(10)投影的离子电流密度不均匀的问题的方法和装置。 在校准期间,本发明使用具有与几个调制电极(22)的宽度成比例非常大的电极(32)的简化离子传感器(36)来感测离子电流(20)。 跨越印刷阵列(16)的宽度的调制电极(22)的组(60),(61)以一个调制电极(22)的步进电子寻址。 为了防止串扰使感测的离子电流(20)值不可用,通过反馈电路(42)调整调制电压(Vm(i)),以实现每组的离子电流(20)的固定值( 60),(61)。 该调制电压(Vm(i))的值被存储在电子数据文件(44)中。 通过编程算法在数据处理器(46)中基于平均调制电压和打印头(10)特性常数计算校正调制电压(Vm(i)')以产生均匀离子电流(20) 访问数据文件(44)。 调制电压(Vm(i)')的校正值通过开关电路(52)施加到每个相关调制电极(22)。 当施加到相关调制电极(22)时,调制电压(Vm(i)')的校正值产生均匀密度的离子电流(20),并导致大的灰色印刷区域的密度均匀。