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    • 65. 发明授权
    • Printing apparatus with first and second measuring means for obtaining a conveying amount of a printing medium
    • 具有用于获得打印介质的输送量的第一和第二测量装置的打印设备
    • US07104710B2
    • 2006-09-12
    • US10929518
    • 2004-08-31
    • Naoji Otsuka
    • Naoji Otsuka
    • B41J11/36B41J11/00
    • B41J11/42
    • A printing medium is conveyed at a high speed and high accuracy by reducing the conveyance error of a conveyor roller as much as possible. For this purpose, the printing apparatus includes first measuring unit for obtaining a conveying amount of said printing medium by measuring a rotational amount of the conveyor roller, second measuring unit for obtaining a conveying amount of the printing medium by directly detecting a moving amount of the printing medium, and control conveying operation by using both of output values obtained from the first measuring unit and the second measuring unit. Thereby, it is possible to correct the output value from the first measuring unit by the output value from the second measuring unit, as well as to switch the output value used for the conveyance control between both the output values.
    • 通过尽可能地减少输送辊的输送误差,高速高精度地输送打印介质。 为此目的,打印设备包括:第一测量单元,用于通过测量传送辊的旋转量来获得所述打印介质的传送量;第二测量单元,用于通过直接检测打印介质的移动量来获得打印介质的传送量; 打印介质和通过使用从第一测量单元和第二测量单元获得的输出值两者的控制传送操作。 因此,可以通过来自第二测量单元的输出值来校正来自第一测量单元的输出值,并且可以在两个输出值之间切换用于输送控制的输出值。
    • 68. 发明申请
    • Printing apparatus
    • 印刷装置
    • US20050053408A1
    • 2005-03-10
    • US10929518
    • 2004-08-31
    • Naoji Otsuka
    • Naoji Otsuka
    • B41J2/01B41J11/42B41J13/00B65H7/02B41J33/14
    • B41J11/42
    • A printing medium is conveyed at a high speed and high accuracy by reducing the conveyance error of a conveyor roller as much as possible. For this purpose, the printing apparatus includes first measuring unit for obtaining a conveying amount of said printing medium by measuring a rotational amount of the conveyor roller, second measuring unit for obtaining a conveying amount of the printing medium by directly detecting a moving amount of the printing medium, and control conveying operation by using both of output values obtained from the first measuring unit and the second measuring unit. Thereby, it is possible to correct the output value from the first measuring unit by the output value from the second measuring unit, as well as to switch the output value used for the conveyance control between both the output values.
    • 通过尽可能地减少输送辊的输送误差,高速高精度地输送打印介质。 为此目的,打印设备包括:第一测量单元,用于通过测量传送辊的旋转量来获得所述打印介质的传送量;第二测量单元,用于通过直接检测打印介质的移动量来获得打印介质的传送量; 打印介质和通过使用从第一测量单元和第二测量单元获得的输出值两者的控制传送操作。 因此,可以通过来自第二测量单元的输出值来校正来自第一测量单元的输出值,并且可以在两个输出值之间切换用于输送控制的输出值。
    • 70. 发明授权
    • Method and apparatus for printing
    • 打印方法和装置
    • US6145962A
    • 2000-11-14
    • US311878
    • 1999-05-14
    • Daigoro KanematsuNaoji OtsukaKentaro YanoKiichiro TakahashiHitoshi NishikoriOsamu IwasakiHidehiko Kanda
    • Daigoro KanematsuNaoji OtsukaKentaro YanoKiichiro TakahashiHitoshi NishikoriOsamu IwasakiHidehiko Kanda
    • B41J2/01B41J2/05B41J2/14B41J2/145B41J2/205B41J2/21B41M5/00C09D11/00C09D11/30C09D11/40H04N1/40
    • H04N1/40087B41J2/2056B41J2/2107
    • In the case of printing in three-value level utilizing two kinds of inks mutually different densities for one color (higher and lower density inks), it is assumed that a reflection density of a region having a predetermined area when solid print is performed only by the lower density ink, and that when solid print is performed only by the higher density ink are expressed ODt and ODn, respectively. Since the granular appearance of the ink dots is expressed in terms of reflection density of one dot, the granular appearance of a lower density ink dot at a portion of image formed only by the lower density ink dots and the granular appearance of a higher density ink dot at a portion of image formed by the higher and lower density ink dots are expressed in terms of values of ODt and (ODn-ODt) divided by the number of pixels included in the above region, respectively. Accordingly, by making the reflection density ODt to be approximately one half of the reflection density ODn, the granular appearance produced by the lower density ink dot at the highlighted portion and the granular appearance produced by the higher density ink dot at the portion where the higher density ink dots scattered in the lower density ink dots can be made substantially equal to each other. For this purpose, it is preferable that a dye concentration of the lower density ink is to be about one fourth of that of the higher density ink.
    • 在使用两种不同浓度的油墨(高浓度和低浓度油墨)的三值油墨印刷的情况下,假设仅在实施印刷时由具有预定区域的区域的反射浓度 较低密度的墨水以及仅通过较高密度墨水进行固体印刷时分别表示为ODt和ODn。 由于墨点的粒状外观以一点的反射密度表示,所以在仅由较低密度墨点形成的图像部分处的较低密度墨点的粒状外观和较高密度墨水的粒状外观 通过高密度和低密度墨点形成的图像的一部分,以ODt和(ODn-ODt)的值分别除以上述区域中包括的像素数来表示。 因此,通过使反射密度ODt为反射密度ODn的大约一半,由突出部分的低密度墨点产生的粒状外观和高密度墨点在较高密度墨点处产生的粒状外观 可以将分散在较低密度墨点中的密度墨点基本上彼此相等。 为此,较低浓度油墨的染料浓度优选为较高浓度油墨的浓度的约四分之一。