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    • 7. 发明申请
    • Measurement of fluid continuity in a fluid carrying member
    • US20050134628A1
    • 2005-06-23
    • US11042919
    • 2005-01-25
    • Justin RomanMartin Rockwell
    • Justin RomanMartin Rockwell
    • B41J2/175B41J2/19B41J29/393
    • B41J2/175B41J2/17566B41J2/19
    • In an inkjet printer using ink reservoirs located physically remote from the print heads, tubes are used to deliver ink from the ink reservoirs to the print heads. Air initially present within the tubes can interfere with the proper operation of the print heads and cause print head reliability problems Additionally, air present within the tubes can interfere with the proper flow of ink from the ink reservoirs to the print heads through the tubes. An embodiment of a fluid continuity measurement apparatus includes current sources for each of the tubes. Each of the current sources delivers a substantially constant current to the corresponding tube. Voltage measurement circuits are coupled across each of the tubes. Each of the voltage measurement circuits generates an output corresponding to the voltage across the corresponding tube. The voltages appearing between the ends of the tubes changes as the volume of the air within the tubes changes. Increasing the volume of air within the tubes increases the resistance of the tubes thereby increasing the voltages resulting from the application of a substantially constant current. A controller coupled to the output of the voltage measurement circuits compares each of the voltages output from the voltage measurement circuits to an empirically determined threshold value to determine if the volume of air within the tubes has reached an unacceptable level.
    • 8. 发明授权
    • Measurement of fluid continuity in a fluid carrying member
    • 流体承载构件中流体连续性的测量
    • US07219974B2
    • 2007-05-22
    • US11042919
    • 2005-01-24
    • Justin RomanMartin G. Rockwell
    • Justin RomanMartin G. Rockwell
    • B41J2/195
    • B41J2/175B41J2/17566B41J2/19
    • In an inkjet printer using ink reservoirs located physically remote from the print heads, tubes are used to deliver ink from the ink reservoirs to the print heads. Air initially present within the tubes can interfere with the proper operation of the print heads and cause print head reliability problems Additionally, air present within the tubes can interfere with the proper flow of ink from the ink reservoirs to the print heads through the tubes. An embodiment of a fluid continuity measurement apparatus includes current sources for each of the tubes. Each of the current sources delivers a substantially constant current to the corresponding tube. Voltage measurement circuits are coupled across each of the tubes. Each of the voltage measurement circuits generates an output corresponding to the voltage across the corresponding tube. The voltages appearing between the ends of the tubes changes as the volume of the air within the tubes changes. Increasing the volume of air within the tubes increases the resistance of the tubes thereby increasing the voltages resulting from the application of a substantially constant current. A controller coupled to the output of the voltage measurement circuits compares each of the voltages output from the voltage measurement circuits to an empirically determined threshold value to determine if the volume of air within the tubes has reached an unacceptable level.
    • 在使用物理上远离打印头的墨水储存器的喷墨打印机中,使用管将油墨从墨水储存器输送到打印头。 最初存在于管内的空气可能会干扰打印头的正常操作,并导致打印头可靠性问题。此外,存在于管内的空气可能会干扰墨水从墨水储存器通过管道到打印头的正确流动。 流体连续性测量装置的实施例包括每个管的电流源。 每个电流源向相应的管提供基本恒定的电流。 电压测量电路跨越每个管耦合。 每个电压测量电路产生对应于相应管两端的电压的输出。 出现在管端部之间的电压随着管内空气体积的变化而变化。 增加管内空气的体积增加了管的电阻,从而增加了施加基本恒定电流所产生的电压。 耦合到电压测量电路的输出的控制器将从电压测量电路输出的每个电压与经验确定的阈值进行比较,以确定管内的空气体积是否达到不可接受的水平。
    • 9. 发明授权
    • Measurement of fluid continuity in a fluid carrying member
    • 流体承载构件中流体连续性的测量
    • US06685295B2
    • 2004-02-03
    • US09773179
    • 2001-01-30
    • Justin RomanMartin G. Rockwell
    • Justin RomanMartin G. Rockwell
    • B41J29393
    • B41J2/175B41J2/17566B41J2/19
    • In an inkjet printer using ink reservoirs located physically remote from the print head, tubes are used to deliver ink from the ink reservoirs to the print heads. Air initially present within the tubes can interfere with the proper operation of the print heads and cause print head reliability problems Additionally, air present within the tubes can interfere with the proper flow of ink from the ink reservoirs to the print heads through the tubes. An embodiment of a fluid continuity measurement apparatus includes current sources for each of the tubes. Each of the current sources delivers a substantially constant current to the corresponding tube. Voltage measurement circuits are coupled across each of the tubes. Each of the voltage measurement circuits generates an output corresponding to the voltage across the corresponding tube. The voltages appearing between the ends of the tubes changes as the volume of the air within the tubes changes. Increasing the volume of air within the tubes increases the resistance of the tubes there by increasing the voltages resulting from the application of a substantially constant current. A controller coupled to the output of the voltage measurement circuits compares each of the voltages output from the voltage measurement circuits to an empirically determined threshold value to determine if the volume of air within the tubes has reached an unacceptable level.
    • 在使用位于物理上远离打印头的墨水储存器的喷墨打印机中,使用管将油墨从墨水储存器输送到打印头。 最初存在于管内的空气可能会干扰打印头的正常操作,并导致打印头可靠性问题。此外,存在于管内的空气可能会干扰墨水从墨水储存器通过管道到打印头的正确流动。 流体连续性测量装置的实施例包括每个管的电流源。 每个电流源向相应的管提供基本恒定的电流。 电压测量电路跨越每个管耦合。 每个电压测量电路产生对应于相应管两端的电压的输出。 出现在管端部之间的电压随着管内空气体积的变化而变化。 增加管内空气的体积通过增加施加基本上恒定的电流产生的电压来增加管的电阻。 耦合到电压测量电路的输出的控制器将从电压测量电路输出的每个电压与经验确定的阈值进行比较,以确定管内的空气体积是否达到不可接受的水平。
    • 10. 发明授权
    • Measurement of fluid continuity in a fluid carrying member
    • 流体承载构件中流体连续性的测量
    • US06886901B2
    • 2005-05-03
    • US10272697
    • 2002-10-16
    • Justin RomanMartin G. Rockwell
    • Justin RomanMartin G. Rockwell
    • B41J2/175B41J2/19B41J29/393
    • B41J2/175B41J2/17566B41J2/19
    • In an inkjet printer using ink reservoirs located physically remote from the print heads, tubes are used to deliver ink from the ink reservoirs to the print heads. Air initially present within the tubes can interfere with the proper operation of the print heads and cause print head reliability problems Additionally, air present within the tubes can interfere with the proper flow of ink from the ink reservoirs to the print heads through the tubes. An embodiment of a fluid continuity measurement apparatus includes current sources for each of the tubes. Each of the current sources delivers a substantially constant current to the corresponding tube. Voltage measurement circuits are coupled across each of the tubes. Each of the voltage measurement circuits generates an output corresponding to the voltage across the corresponding tube. The voltages appearing between the ends of the tubes changes as the volume of the air within the tubes changes. Increasing the volume of air within the tubes increases the resistance of the tubes thereby increasing the voltages resulting from the application of a substantially constant current. A controller coupled to the output of the voltage measurement circuits compares each of the voltages output from the voltage measurement circuits to an empirically determined threshold value to determine if the volume of air within the tubes has reached an unacceptable level.
    • 在使用物理上远离打印头的墨水储存器的喷墨打印机中,使用管将油墨从墨水储存器输送到打印头。 最初存在于管内的空气可能会干扰打印头的正常操作,并导致打印头可靠性问题。此外,存在于管内的空气可能会干扰墨水从墨水储存器通过管道到打印头的正确流动。 流体连续性测量装置的实施例包括每个管的电流源。 每个电流源向相应的管提供基本恒定的电流。 电压测量电路跨越每个管耦合。 每个电压测量电路产生对应于相应管两端的电压的输出。 出现在管端部之间的电压随着管内空气体积的变化而变化。 增加管内空气的体积增加了管的电阻,从而增加了施加基本恒定电流所产生的电压。 耦合到电压测量电路的输出的控制器将从电压测量电路输出的每个电压与经验确定的阈值进行比较,以确定管内的空气体积是否达到不可接受的水平。