EP2406081A1 - Récipient de fluide d'impression pour une imprimante et une imprimante - Google Patents

Récipient de fluide d'impression pour une imprimante et une imprimante

Info

Publication number
EP2406081A1
EP2406081A1 EP09779124A EP09779124A EP2406081A1 EP 2406081 A1 EP2406081 A1 EP 2406081A1 EP 09779124 A EP09779124 A EP 09779124A EP 09779124 A EP09779124 A EP 09779124A EP 2406081 A1 EP2406081 A1 EP 2406081A1
Authority
EP
European Patent Office
Prior art keywords
circuit
container
sensor
unit
switching unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09779124A
Other languages
German (de)
English (en)
Inventor
Massimo Casalegno
Joachim Kretschmer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pelikan Hardcopy Production AG
Original Assignee
Pelikan Hardcopy Production AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pelikan Hardcopy Production AG filed Critical Pelikan Hardcopy Production AG
Publication of EP2406081A1 publication Critical patent/EP2406081A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/17526—Electrical contacts to the cartridge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/17543—Cartridge presence detection or type identification
    • B41J2/17546—Cartridge presence detection or type identification electronically

Definitions

  • the present invention relates to a container according to the preamble of claim 1 and a printing device with the container.
  • Containers for print media of various manufacturers are basically flexible together with different
  • EP-I 403 070 Bl and EP-A 837 187 disclose procedures which proceed from the stated problem.
  • a pressure device from which the level of the container is queried, and which expects to continue operation, a specific level-representative state signal as a response signal, which is generated by a level sensor on the container, with a container to be able to operate, in which no level sensor is installed, a sensor replacement module according to EP-I 403 070 Bl is installed on the container.
  • an input module is provided on the container, by means of which the signals received by the printing device of different significance are selectively forwarded to various units affected thereby, which are installed by means of a chip on the respective container. If it is detected on a signal coming from the pressure device that it is a fill level request signal, then the sensor replacement module is activated. Like a sensor actually present on a container, the sensor replacement module is activated by the detected fill level request signal. It simulates the operation of the - not installed - sensor. Due to this operational simulation, there is also the expected from the pressure gauge level indicator signal. An output module on the container transmits the level indication signal back to the printing device. The pressure device then assumes the operating state that it would assume if an actually provided level sensor, in response to the aforementioned query, outputs a substantially identical level indication signal.
  • Sensor replacement modules emulate a real sensor poorly, so that the printing device stops the printing process because of unexpected response signals. It is therefore an object of the present invention to provide a container with a sensor equivalent circuit, which does not have the disadvantages mentioned above.
  • the invention relates first of all to a container with pressure medium for a pressure device, wherein the container comprises: an interface with at least two contact points, via which electrical signals can be exchanged with the pressure device, wherein a state request signal can be transmitted via the interface to the container for determining a container state and thereafter, a status indication signal is transmitted back to the printing apparatus via the interface, and - an equivalent circuit as a substitute for a piezoelectric sensor, wherein the state request signal of the equivalent circuit is applied.
  • the invention is characterized in that the equivalent circuit has a resonant circuit connectable to the contact points, that a circuit unit and a series-connected switching unit are provided, wherein the series-connected circuit unit and switching unit are connected in parallel to the resonant circuit, and that the circuit unit of at least one of the following circuits consists: - Design circuit for generating a desired transient response;
  • a compensation circuit is provided which is connected in parallel to the switching unit.
  • the equivalent circuit consists of passive components.
  • the design circuit is present and consists of a plurality of parallel resistor-capacitance elements having different time constants.
  • Further embodiments of the present invention consist in that the asymmetry circuit is present and consists of a plurality of parallel connected resistance-capacitance diode elements having the same time constants as the time constants of the resistance-capacitance elements of the design circuit.
  • control unit acts on the switching unit for determining the switching state, wherein the control unit is connected in parallel with the resonant circuit.
  • the switching unit is a semiconductor switching element, in particular of the type MOSFET with gate, source and drain terminal, and that the control unit comprises series-connected Zener diodes for driving the gate terminal of the switching unit.
  • a sensor for detecting a pressure medium depression is present and that the sensor has an output which is operatively connected to the sensor equivalent circuit, wherein a behavior of the Sensor replacement circuit is changeable when the sensor detects a current pressure medium low, which is below a predetermined value.
  • a sensor for determining the pressure medium depression in the container can be used independently of the implementation form of the sensor equivalent circuit.
  • the sensor equivalent circuit can trigger an "empty" feedback to the printer by correspondingly changing the sensor replacement circuit.
  • Further embodiments of the present invention are that the output of the sensor acts on the resonant circuit such that a resonant frequency characterizing the resonant circuit is variable.
  • a sensor for determining a pressure medium level is present and that the sensor has an output which is operatively connected to the sensor equivalent circuit, wherein a behavior of the sensor equivalent circuit in dependence of the determined pressure medium Level is changeable.
  • a sensor for determining the pressure medium level in the container can be used regardless of the implementation form of the sensor replacement circuit.
  • the sensor equivalent circuit can be continuously changed depending on the pressure medium level, so that a generated by the sensor equivalent circuit state indication signal always corresponds to the current pressure medium level.
  • a pressure device is specified with at least one container according to one of the mentioned embodiments.
  • FIG. 1 is a simplified signal flow / function block diagram of a container according to the invention with a pressure device in a first embodiment
  • 2a is a diagram of a pressure signal side generated state request signal in function of time
  • FIG. 2a shows a state indication signal transmitted back from the container to the printing device
  • Fig. 3 is a block diagram of a first
  • Variant for a sensor replacement circuit 4 is a circuit diagram of a variant embodiment of a resonant circuit
  • FIG. 5 is a circuit diagram of an embodiment of a design circuit
  • FIG. 6 is a circuit diagram of an embodiment for an asymmetry circuit
  • Fig. 7 shows a possible voltage curve over
  • FIG. 9 is a circuit diagram of a variant embodiment of a memory effect circuit
  • 11 is a circuit diagram of an embodiment for a compensation circuit
  • Fig. 12 shows a variant for a
  • FIG. 1 Circuit arrangement for a control unit with switching unit, In Fig. 1 is shown in a simplified illustrated SignalfIuss- /ginasblock Diagra ⁇ tm a
  • Embodiment of an inventive container 1 and a printing device 2 with such a container 1 shown Between the printing device 2 and a container 1 containing at least one usually liquid printing medium (not shown), such as ink, there is a two-way signal connection 7.
  • a container-side interface 6b is provided and a pressure-device-side interface 6a.
  • the signal transmission between the interfaces 6a and 6b takes place, for example, via contact points made of metal.
  • a printing device processor unit 3 is included, by means of which a status request signal s (t) is transmitted via the two-way signal connection 7 and the interface 6 to the container 1.
  • the two-way signal connection via the interfaces 6 is exclusively for state request signals s (t) and
  • FIG. 2 a shows a status request signal s (t) which is generated by the print processor 3 and is supplied via the two-way signal connection 7 and the interface 6 to the sensor replacement circuit 4 contained in the container 1. Due to the state request signal s (t) and the Sensor equivalent circuit configuration, which will be explained in detail, a status indication signal s' (t) is generated by the sensor equivalent circuit 4 in response. The status indication signal s' (t) is then in turn passed via the interface 6 to the printing device processor 3, in which an analysis is performed according to predetermined criteria.
  • the state indication signal s' (t) with respect to the state request signal s (t) is usually time-delayed, which is indicated in Fig. 2b by the time delay ⁇ .
  • the time delay ⁇ can be an important factor in the analysis of the status indication signal s' (t) and accordingly by the
  • Pressure device processor 3 can be determined. Thus, not only the amplitude profile of the state indication signal s' (t) in the analysis in the pressure device processor 3 can be critical, but also the delay time ⁇ between the state request signal s (t) and the state indication signal s 1 (t).
  • the sensor equivalent circuit 4 is configured in such a way that the most complete possible emulation of a so-called piezo-electric sensor, which is usually used to determine an ink level of remaining ink in the container 1.
  • a piezoelectric sensor is simulated in such a way that the printing device processor 3 assumes that a piezoelectric sensor is present although this does not have to be the case.
  • the requested device status signal s' (t) is applied to the printing device 2 or the printing device processor 3 in the same way as if a detecting piezoelectric sensor indicating the requested state were provided on the container 1.
  • the polled by the printing device 2 state is usually a level state on the container 1 with respect to a pressure medium.
  • the status indication signal s' (t) generated by the sensor equivalent circuit is a level indication signal of a level sensor not mounted on the container 1.
  • Fig. 3 shows a sensor equivalent circuit 4 as a replacement for a piezoelectric sensor.
  • the sensor equivalent circuit 4 has two contact points 10 and 11, which form the interface 6 (FIG. 1) for the printing device 2 (FIG. 1).
  • Sensor replacement circuit side a resonant circuit 12 is connected to the contact points 10 and 11. Also between the contact points 10 and 11 is a
  • Control unit 18 for controlling a switching unit 17, which in turn is connected in parallel with a compensation circuit 16.
  • Switching unit 17 and compensation circuit 16 are in line with a circuit unit 9 (dash-dot lined in Fig. 3) shown) and together form another parallel to the contact points 10 and 11 connected unit.
  • the circuit unit 9 can consist of a plurality of parallel-connected circuits.
  • the resonant circuit 12 has the same natural frequency, such as a container completely filled with pressure medium, which is equipped with a piezoelectric sensor.
  • a possible embodiment for the resonant circuit 12 is shown in FIG. It is basically a so-called LC resonant circuit, consisting of an inductance L3 ⁇ and a capacitor C37, said resonant circuit is connected in series with another capacitor C39.
  • the Resonance frequency of the resonant circuit is adjusted by the selection of the values for the inductance L36 and the capacitance C37, wherein the resonant frequency corresponding to the natural vibration of the piezoelectric sensor in completely filled with pressure medium container.
  • a capacitance C38 can be connected via the switching unit 19 in parallel to the capacitance C37.
  • the resonant frequency of the resonant circuit can be changed, which can be simulated with the sensor equivalent circuit 4, another level of the container. Consequently, it is conceivable that the resonant frequency of the resonant circuit is set such that when the switch unit 19 is open, a full container 1 and with the switch unit 19 closed, an almost empty container 1 is simulated. If now a low pressure medium level in the container 1 is detected by means of a simple sensor, then the switch unit 19 can be controlled with the output signal of the simple sensor and the behavior of the sensor equivalent circuit adjusted according to the true pressure medium level.
  • a simple sensor one of the following forms of implementation comes into question:
  • - pressure sensor for example via color detection; - resistance measurement;
  • the embodiment variant with the switching unit 19 for changing the resonance frequency corresponding to a different level of the pressure medium in the container 1 represents an inventive aspect, on the one hand in combination with the aspects further described here as well as independent of these aspects, significant improvements and can be protected independently.
  • the design circuit 13 will be explained with reference to FIG. 5, which shows one possible embodiment.
  • the transient response of the piezoelectric sensor is simulated. It has been found that by means of RC elements, which each consist of a series connection of a resistor R22 and a capacitor C23, the temporal behavior can be well modeled, with basically several parallel RC elements can be used, as indicated from RCl, RC2 to RCn in Fig. 5 is indicated.
  • the asymmetry circuit 14 (Fig. 3) will be explained with reference to Fig. 6, which shows one possible embodiment.
  • an asymmetric behavior of the equivalent circuit is generated when a pulse is given to a contact point 10 or 11 and the response is measured at the other contact point 11 or 10 after the other contact point 11 or 10 is released, ie is no longer set to a predetermined potential.
  • the asymmetry circuit 14 consists of one or more parallel-connected RCD members RCDL, RCD2, ..., RCDn, each of which consists of a series connection of a capacitor C25 and a resistor R24, to which a diode D26 is connected in parallel.
  • RCD-elements RCDl, ..., RCDn behaves asymmetrically.
  • the capacitance C25 is only partially charged, namely as a function of the resistance value for the resistor R24. Further, the charging current for the capacitor C25 is limited by the resistor R24. If, on the other hand, a negative pulse is applied, the capacitance C25 is charged immediately via the diode D2 ⁇ . When the other terminal is disconnected for measurement by the pulse generating voltage source, in the case of a positive pulse, the capacitance C25 is further charged by a current. With a negative pulse, charging current will no longer flow for the capacitor C25. Therefore, the amplitude of the response to the positive pulse will be higher as for a negative pulse. This is darg Benefici in Figs. 7 and 8, wherein 41, 43, the signals on the terminal 41 and 42, 44, the signals on the terminal 42 are designated.
  • Fig. 7 denotes the positive pulse applied to the upper terminal 41 of the asymmetry circuit 14 (Fig. 3).
  • the pulse has a voltage of 32V while the other terminal is connected to ground.
  • Example 200 the second terminal is disconnected from the ground and a measurement of the voltage waveform - indicated in Fig. 7 with 42 - begins at the second terminal.
  • Fig. 8 designates the pulse applied to the lower terminal 42 of the asymmetry circuit 14 (Fig. 3).
  • 43 denotes the voltage curve measured at the other terminal.
  • the time constants, which are given by the RC elements in the design circuit 13 and in the asymmetry circuit 14, of the same RC elements are the same size.
  • the pulse responses at the two terminals are different, but the shape of the amplitude curves will be the same.
  • the memory effect circuit 15 (FIG. 3) will be explained with reference to FIG. 9, in which a possible embodiment variant is again shown.
  • the memory effect circuit 15 causes the equivalent circuit to have a memory effect to make the circuit less responsive, the more pulses on the equivalent circuit, and the shorter the intervals between the pulses.
  • the memory effect circuit 15 consists of one or more parallel-connected RCD members, each of these RCD members two parallel RC elements consisting of capacitance C29 respectively. C31 and resistor R28 resp. R30, has. Furthermore, a parallel connection of a resistor R27 and a diode D32a is realized in series with the two RC elements.
  • the RC element formed by the resistors R28 and R30 and the capacitances C29 and C31 and the capacitances C29 and C31 are quickly charged by a positive pulse through the diode D32a. After that, however, the charge is degraded only slowly, since the resistor R27 responsible for this has a relatively high resistance value compared with the resistance values of the resistors R28 and R30. If another pulse is applied soon after (ie, before the charge in capacitances C29 and C31 has depleted) after the first pulse, capacitances C29 and C30 will still be at least partially charged, thus making the new charge current correspondingly smaller than wholly uncharged capacitances C29 and C30. As a result, the Response to another pulse will be weaker. Therefore, this circuit is said to have a memory effect.
  • Voltage curve of the upper contact point and indicated by 46 a voltage curve of the lower contact point. It can be clearly seen from FIG. 10 that the voltage level in the voltage curve 46, which represents the response signal to a pulse according to the voltage curve 45, is dependent on the repetition rate of the excitation pulse: the shorter the pulse sequence in the excitation pulses, the smaller the amplitude the response signal.
  • the memory effect circuit 15 (FIG. 3) also reacts with memory effect according to the above information, even with the polarity of the excitation pulse reversed, a diode D32b in the reverse configuration is present in the second RCD element shown in FIG. This ensures that the memory effect circuit 15 reacts independently of the polarity of the excitation pulse with a memory effect.
  • the compensation circuit 16 has a resistor R33 and RC elements connected in parallel, consisting of a capacitor C35 and a resistor R31
  • the switching unit 17 according to FIG. 12 is realized with a MOSFET (Metal Oxide Semiconductor Field Effect Transistor) the control unit 18 - again in accordance with FIG. 12 - as a series circuit of a capacitor C18 and two Zener diodes Z19.
  • MOSFET Metal Oxide Semiconductor Field Effect Transistor
  • the compensation circuit 16 is responsible to the switching unit 17 and the control unit 18 for reversing the asymmetry when a response signal is measured by the printing apparatus 2 at the same pad 10, 11 on which the exciter pulse has been applied.
  • the MOSFET switching unit 17 is saturated (ie, the switching state of the switching unit is closed) when a positive excitation pulse is applied, and the switching unit 17 is opened when a negative excitation pulse is applied.
  • Zener diodes Z19 allow a positive excitation pulse to charge the gate-to-source junction. The charge accumulated in the transition also stays behind the decay of the positive excitation pulse is present, whereby the switching state of the switching unit 19 and the MOSFET remains after the exciter pulse.
  • the capacitance C18 is provided.
  • the capacitance C18 is not absolutely necessary since the MOSFET already has a capacitance on the order of between 10 pF and 1 nF between the gate and the source terminal.
  • the switching unit 17 or the MOSFET In the case of a positive excitation pulse, the switching unit 17 or the MOSFET is closed and the response to the exciter pulse is generated by the circuit unit 9 - i. one or more of the circuits design circuit 13, asymmetry circuit 14 and memory effect circuit 15 - determined alone. In the case of a negative excitation pulse, the switching unit 17 or the MOSFET is opened, and the energy stored in the design circuit 13, in the asymmetry circuit 14 and in the memory effect circuit 15 is reduced via the compensation circuit 16, which develops a damping effect. As long as the compensation circuit 16 attenuates the response more than the response of the circuit unit 9, the asymmetric behavior of the whole sensor equivalent circuit is inverted. In this context, the
  • Compensation circuit 16 the average impedance of the circuit unit 9 to guarantee that the form of the response remains the same, even if the amplitude of the response of the equivalent circuit is attenuated when the switching unit 17 and the MOSFET is opened.

Landscapes

  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

Récipient de fluide d'impression pour une imprimante, le récipient comprenant: - une interface avec au moins deux points de contact (10, 11) par l'intermédiaire desquels des signaux électriques peuvent être échangés avec l'imprimante, un signal de demande d'état pouvant être transmis au récipient pour déterminer un état du récipient et ensuite un signal d'indication d'état pouvant être retransmis à l'imprimante par l'intermédiaire de l'interface, et - un circuit de remplacement (4) comme remplacement pour un capteur piézoélectrique, le signal de demande d'état étant émis par le circuit de remplacement (4). L'invention est caractérisée en ce que le circuit de remplacement (4) comprend un circuit de résonance (12) pouvant être connecté aux points de contact, en ce qu'une unité de circuit de commutation (9) et une unité de commutation (17) connectée en série sont présentes, l'unité de circuit de commutation (9) connectée en série et l'unité de commutation (17) étant connectées en parallèle au circuit de résonance (12) et en ce que l'unité de circuit de commutation (9) est constituée d'au moins un des circuits suivants: - circuit de mise en oeuvre (13) pour produire un comportement en régime transitoire souhaité; - un circuit dissymétrique (14); - un circuit à effet mémoire (15).
EP09779124A 2009-03-09 2009-03-09 Récipient de fluide d'impression pour une imprimante et une imprimante Withdrawn EP2406081A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2009/052730 WO2010102660A1 (fr) 2009-03-09 2009-03-09 Récipient de fluide d'impression pour une imprimante et une imprimante

Publications (1)

Publication Number Publication Date
EP2406081A1 true EP2406081A1 (fr) 2012-01-18

Family

ID=41259144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09779124A Withdrawn EP2406081A1 (fr) 2009-03-09 2009-03-09 Récipient de fluide d'impression pour une imprimante et une imprimante

Country Status (2)

Country Link
EP (1) EP2406081A1 (fr)
WO (1) WO2010102660A1 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4175065B2 (ja) * 2002-09-24 2008-11-05 セイコーエプソン株式会社 カートリッジ、印刷装置およびカートリッジと情報をやり取りする方法
JP4730391B2 (ja) 2008-04-21 2011-07-20 セイコーエプソン株式会社 カートリッジ、印刷装置およびカートリッジと情報をやり取りする方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010102660A1 *

Also Published As

Publication number Publication date
WO2010102660A1 (fr) 2010-09-16

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