• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An ink jet printer includes a deflection electrode for providing a deflection field, which field will deflect charged ink drops. The power supply and control circuit for the deflection electrode includes a capacitor storage arrangement in which a brief short between the deflection electrode and adjacent structure will be compensated by a capacitance which is switched into electrical connection with the deflection electrode only during deflection electrode shorts. The control circuit also monitors the deflection electrode potential and if an electrode short which reduces the electrode potential substantially persists for a period greater than a preselected period of time, the printer will be disabled and printing operations terminated.
    公开号:SU1098530A3
    申请号:SU782665897
    申请日:1978-09-05
    公开日:1984-06-15
    发明作者:Р.Стаджер Вильям
    申请人:Дзе Мэд Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    Isobretenie refers to the automation and can be used in printing devices, including when displaying information from a computer. Inkjet printers are known that contain an inkjet printhead. supplying a paint, a deflecting electrode mounted on it and connected through the first resistor to a zero potential bus, a voltage converter, the input of which is connected to the output of the power supply, a control unit of the deflecting potential, the input connected to the deflecting electrode and the output to the input of the block control output of the control unit is connected to the control input of the power supply unit CT1. In known devices, printing is carried out by streams of liquid conductive ink exiting from one or several holes under pressure. Due to the mechanical vibration effect, the ink does not flow in a continuous flow, but by a successive flow of pre-charged droplets, some of these drops are deflected and deposited on the information carrier, for example a moving paper tape, and the other part is delayed by a special collector. . The deflecting electrodes in jet-jet devices have a high potential, of the order of I00 V. As a result of the impact of dust and lint particles, for example, which form information as a result of the fast movement of information, there can be short-time breakdowns between the deflecting electrode and other parts of the devices, which in turn can lead to the fact that the paint is causing the information carrier or device parts to stop, and to stop the device for subsequent cleaning. To prevent these emergency situations in known devices, there is a control unit connected to the control unit of the printing device. The control unit generates an alarm in the event of a decrease in the potential of the deflection electrode, the device stops, the ink supply stops, which continues until the potential of the deflection electrode returns. 0 As a result, the speed of the device 23 is reduced. The practical use of inkjet printing devices shows that in the overwhelming majority of cases, breakdowns are so short-lived that they cannot lead to an emergency situation and do not require stopping. In known devices, this fact is not taken into account, which leads to a decrease in printing speed and reliability. The purpose of the invention is to increase printing speed and reliability. This goal is achieved by the fact that a device containing an inkjet printing head, a deflecting electrode installed on it and connected through the first resistor to (zero potential, voltage converter, input connected to the output of the power supply, control unit deviation to the potential center, the input of which is connected to the deflecting electrode, and the output to the input of the control unit, the output of the poisoning unit is connected to the control input of the power supply unit; an electrode consisting of a capacitor, a second, third and fourth resistor and a diode, the anode of which is connected to the first terminal of the second resistor and the power supply bus, and the cathode of the diode is connected to the first terminals of the third resistor and capacitor; the second terminals of the second and third resistors are connected to the first the output of the fourth resistor and the output of the voltage converter; the second output of the fourth resistor is connected to the second output of the capacitor and to the zero potential bus. The deviating potential control unit contains a delay element and a comparator, whose output is the output of the deviating potential control unit, and the input is connected to the output of the delay element, the input of the delay element is the input of the deviating potential control unit. The drawing shows a diagram of the proposed device. The device contains a printhead with inkjet ink supply (not shown), a deflection electrode (not shown), a first resistor 1, a deflection potential bus 2, a zero potential bus 3, a deflection potential control unit 4, a control unit 5, a power supply unit 6 , voltage converter 7, deviating potential recovery unit 8, coupling 9, second 10, third 11 and fourth 12 resistors, diode t3, delay element 14, and comparator -15. One of the terminals of the first resistor I is connected to the deflection potential bus 2. The deflecting electrode and the printhead housing are connected to the busbars 2 and 3 of the deflecting and zero potentials respectively, the input of the deflecting potential control unit 4 is connected to the deflecting bus, and the output is connected to the input of the control unit 5, the output of the control unit 5 is connected to the control input of the power supply unit 6, the inputs and outputs of the voltage converter 7 are connected respectively to the outputs of the power supply unit 6 and to the inputs of the deflecting potential recovery unit 8, the output of the deflection potential recovery unit 8 connects The second terminal of the first resistor, the first terminal of the capacitor 9 is connected to the first terminal of the resistor 10 and the second terminal of the potential of the second terminal of the resistor 10 is connected to the first terminals of resistors I1 and 12 and is the input of the deflection potential recovery unit 8, the second terminal of the capacitor 9 is connected with the second terminal of the resistor 11 and with the cathode of the diode 13, the anode of the diode 13 is connected to the second terminal of the resistor t2 and is the output of the deviation potential recovery unit 8, the input of the delay element 14 is the input of the deviation control unit 4 the output potential, and the output is connected to the input of the comparator 15, the output of which is the output of the control unit 4 deviation of more than the potential. The device works as follows. During normal operation of the device and the absence of breakdowns of the deflection potential circuits, a high voltage, on the order of 1100 V, is fed through resistors 1 0 1 and 12 to the deflecting electrode and maintained within the normal range. The capacitor 9 is then charged through the resistor t1 to a value. the output voltage of the converter 7. In the case of electrical breakdown between the deflecting electrode and other elements of the printhead, the current consumption increases, which leads to voltage losses on the resistors 12 and 1, and this causes the diode 13 to open, so that the voltage at the output of the block 8 remains almost unchanged. However, on the tire, the potential for the pit potential is more significant. The voltage at the input of the comparator changes with some delay. 2 of the deflecting potential and at the output of the block 8 is quickly restored due to the fact that the large capacitance of the capacitor 9 is turned off due to the blocking of the diode 13. The charge of the same capacitor 9 occurs through the resistor 11 and does not Do is the magnitude of the output voltage of the converter 7. In the case of emergency breakdown voltage deflecting potential to deflect gate electrode is reduced significantly, which entails a triggering of the comparator 15 and the subsequent deflection signal supply unit 6 from the control unit 5 and stop the device. Thus, the proposed device eliminates the loss of stopping time. At short-term voltage breakdowns of the deflecting electrode due to a delay in the operation of the comparator and the rapid restoration of the deflecting potential after the breakdown of the breakdown. shutdowns due to short-term breakdown of deflection voltage.

    L.
    权利要求:
    Claims (2)
    [1]
    1. Inkjet printing device, containing a printhead with inkjet ink supply, a deflecting electrode mounted on it and connected through a first resistor to a deflecting potential bus, a voltage converter, the input of which is connected to the output of the power supply unit, the control unit of the deflecting potential, the input of which is connected with a deflecting electrode, and the output with the input of the control unit, the output of the control unit connected to the control input of the power supply, characterized in that, in order to increase printing speed and reliability, it contains a potential recovery unit of the deflecting electrode, consisting of a capacitor, second, third and fourth resistors and a diode, the anode of which is connected to the first terminal of the second resistor and to the power bus, and the cathode of the diode is connected to the first terminals of the third resistor and capacitor, the second terminals of the second and the third resistor is connected to the first terminal of the fourth resistor and to the output of the voltage converter, the second terminal of the fourth resistor is connected to the second terminal of the capacitor and to the zero potential bus.
    [2]
    2. The device according to p. , the input of the delay element is the input of the control unit of the deflecting potential.
    SU mi 1098530
    类似技术:
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    同族专利:
    公开号 | 公开日
    DE2835628A1|1979-03-08|
    JPS5456836A|1979-05-08|
    DE2835628C2|1984-03-01|
    CA1101045A|1981-05-12|
    NL7807703A|1979-03-08|
    CH634780A5|1983-02-28|
    IL55146D0|1978-09-29|
    US4119973A|1978-10-10|
    SE450105B|1987-06-09|
    GB2003796B|1982-02-24|
    FR2401776B1|1983-12-30|
    IT1108572B|1985-12-09|
    SE8302427D0|1983-04-29|
    IT7868852D0|1978-08-03|
    IL55146A|1981-02-27|
    JPS605192B2|1985-02-08|
    DE2858010C2|1988-07-28|
    GB2003796A|1979-03-21|
    BR7805696A|1979-05-29|
    FR2401776A1|1979-03-30|
    JPS6351869B2|1988-10-17|
    SE8302427L|1983-04-29|
    BE870260A|1979-03-06|
    SE7809306L|1979-03-07|
    SE438472B|1985-04-22|
    JPS58197060A|1983-11-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3373437A|1964-03-25|1968-03-12|Richard G. Sweet|Fluid droplet recorder with a plurality of jets|
    US3701998A|1971-10-14|1972-10-31|Mead Corp|Twin row drop generator|
    JPS5230214B2|1973-03-12|1977-08-06|
    US3911445A|1974-09-25|1975-10-07|Dick Co Ab|Ink drop stream integrity checker in an ink jet printer|
    US3955203A|1975-01-24|1976-05-04|International Business Machines Corporation|High voltage deflection electrode apparatus for ink jet|
    JPS5416741B2|1975-08-18|1979-06-25|JPS5787966A|1980-11-25|1982-06-01|Ricoh Co Ltd|Ink jet recorder|
    US4439776A|1982-06-24|1984-03-27|The Mead Corporation|Ink jet charge electrode protection circuit|
    US4573057A|1985-03-04|1986-02-25|Burlington Industries, Inc.|Continuous ink jet auxiliary droplet catcher and method|
    US4736209A|1985-10-10|1988-04-05|Burlington, Industries, Inc.|Tensionable ground electrode for fluid-jet marking apparatus|
    US4639737A|1985-10-10|1987-01-27|Burlington Industries, Inc.|Tensionable electrodes for charging and/or deflecting fluid droplets in fluid-jet marking apparatus|
    US5736997A|1996-04-29|1998-04-07|Lexmark International, Inc.|Thermal ink jet printhead driver overcurrent protection scheme|
    US6081280A|1996-07-11|2000-06-27|Lexmark International, Inc.|Method and apparatus for inhibiting electrically induced ink build-up on flexible, integrated circuit connecting leads, for thermal ink jet printer heads|
    US6758547B2|2002-07-10|2004-07-06|Lexmark International, Inc.|Method and apparatus for machine specific overcurrent detection|
    US7571973B2|2003-03-22|2009-08-11|Hewlett-Packard Development Company, L.P.|Monitoring fluid short conditions for fluid-ejection devices|
    US6825675B1|2003-06-27|2004-11-30|Lexmark International, Inc.|Method for detecting a shorted printhead in a printer having at least two printheads|
    US7695089B2|2005-08-25|2010-04-13|Hewlett-Packard Development Company, L.P.|Ink short detection|
    GB2461014B|2008-02-08|2012-07-18|Domino Printing Sciences Plc|Improvemets in or relating to continuous inkjet printers|
    GB2552327A|2016-07-18|2018-01-24|Domino Uk Ltd|Improvements in or relating to continuous inkjet printers|
    GB2575077A|2018-06-28|2020-01-01|Domino Uk Ltd|Stroke direction offset adjustment|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/831,094|US4119973A|1977-09-06|1977-09-06|Fault detection and compensation circuit for ink jet printer|
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