EP1048470A1 - Tintenstrahldrucker und Verfahren zur Kontrolle der Tintenqualität in einem solchen Drucker - Google Patents

Tintenstrahldrucker und Verfahren zur Kontrolle der Tintenqualität in einem solchen Drucker Download PDF

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Publication number
EP1048470A1
EP1048470A1 EP00401140A EP00401140A EP1048470A1 EP 1048470 A1 EP1048470 A1 EP 1048470A1 EP 00401140 A EP00401140 A EP 00401140A EP 00401140 A EP00401140 A EP 00401140A EP 1048470 A1 EP1048470 A1 EP 1048470A1
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EP
European Patent Office
Prior art keywords
ink
pressure
funct
machine
temperature
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Withdrawn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
EP00401140A
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English (en)
French (fr)
Inventor
Alain Pagnon
Laurent Farlotti
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.)
Markem Imaje SAS
Original Assignee
Imaje SA
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 Imaje SA filed Critical Imaje SA
Publication of EP1048470A1 publication Critical patent/EP1048470A1/de
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • B41J2/195—Ink jet characterised by ink handling for monitoring ink quality

Definitions

  • the present invention relates to a printer with inkjet and a method for managing the quality of ink from such a printer.
  • the document referenced [1] takes into account the measurement of the emptying time, by the inkjet, of a calibrated volume.
  • a temperature sensor allows take into account the natural influence of temperature on the quality of the ink. The temperature acts indeed on the viscosity and on the density of the ink.
  • the enslavement carried out uses a drain curve depending on the temperature. A point of reference is established when the machine is started to take into account dispersions between different applications considered. But such a process is only approximate.
  • the machine used is equipped with a specific device (ball viscometer) to know the viscosity of the machine ink.
  • a curve viscosity / temperature translates the setpoint of operation.
  • This process is independent of inkjet and does not does not involve operating pressure.
  • This machine works at constant pressure and does not provide consistent writing quality on a wide temperature range.
  • cost is high due to the use of a solenoid valve, a calibrated tube, a calibrated ball, detectors, piping ...
  • the object of the invention is to overcome the different drawbacks of known art documents by proposing a quality management process for ink from an inkjet printer, which develops itself its operating instruction without operator intervention.
  • the present invention describes a method for managing the quality of the ink in an inkjet printer, in which information relating to the ink pressure P, the temperature T and the jet speed V and d is available.
  • coefficients a and b are known in advance with sufficient precision to a given machine configuration from measurements performed on a control machine and are stored in memory of each machine produced.
  • ⁇ n (T) and ⁇ n (T) are tabulated by being obtained from laboratory tests.
  • the information concerning the characteristics of the ink used is contained in an electronic label associated with the container of the ink.
  • the values of ⁇ and ⁇ are then calculable and allow the value of the difference in height H to be calculated precisely (the only remaining unknown in the equation of calculated ⁇ P).
  • These values ( ⁇ , ⁇ ) reflect the difference between the reference ink and the ink actually used by the machine.
  • Significant values ( ⁇ , ⁇ ) calculated both during a first start-up and for subsequent restarts of the printer can highlight a problem of ink destabilization, it is then interesting to warn the user of the problem observed.
  • the measurement of the ink temperature T 0 and several measurements of the torque (P funct , V) are carried out by carrying out a scan at jet speed, the ink flowing from the jet is collected and on this ink the measurement of ( ⁇ (T 0 ), ⁇ (T 0 )), we then trace (P funct ) / V as a function of V, we select the best straight line translating the distribution of the couples (P funct / V, V) in the diagram (P funct / VV), we obtain the coefficient b by dividing the ordinate at the origin of the straight line by the measured viscosity ⁇ (T 0 ) of the ink and the coefficient a by dividing the slope from the right by the measured density ⁇ (T 0 ) of the ink.
  • the same sensor is used.
  • pressure for determining the setpoint and for the measurement of the operating pressure and a temperature sensor located in the print head.
  • a condenser is used programmable efficiency, varying the period of the capacitor.
  • the same mode of use is used. operation during all restarts of the machine, we monitor the quality drifts of ink, and we alert the user on an evolution abnormal of it.
  • the present invention also relates to a inkjet printer including a reservoir of recovery, solvent addition devices and adding ink controlled by a control body thanks to to solenoid valves, pressure sensors, temperature and jet speed at the head outlet connected to this control unit, a electrically controlled pressure regulator and a electrically controlled condenser, both controlled by the control body, and means for modulating the power supply to the condenser.
  • the relation linking the operating pressure to the quality of the ink is the sum of four terms: a term of kinetic energy a ⁇ V 2 , a term of viscous friction b ⁇ V, a term of energy potential pgh, and a term associated with the surface tension of the fluid. This last term of surface tension is negligible compared to the other terms: it represents less than 2% of the operating pressure and varies little as a function of the temperature.
  • the most important term is the kinetic energy term a ⁇ ⁇ ⁇ V 2 (around 70 to 80% at nominal temperature).
  • the evolution of this term is associated with the evolution of the density ⁇ as a function of the temperature T, because the jet speed is considered constant, and a independent of the temperature T.
  • viscous friction b ⁇ V represents 15 to 20% of the operating pressure P funct at ambient temperature but its evolution as a function of the temperature T is significant. This change is directly linked to that of the viscosity of the ink as a function of the operating temperature, V and b being independent of the temperature T.
  • FIG. 1 illustrates a simplified diagram of an ink jet printer according to the invention.
  • This includes a reservoir 10 containing a certain ink volume 11, the remaining volume 12 being filled of air, a pipe 13 connecting this tank 10 to the print head 14, adding devices 16 and 17 solvent and ink addition controlled by a control 18 by means of solenoid valves 26 and 27, pressure, temperature and pressure sensors 20, 21 and 22 jet speed 25 at the outlet of the head 14 connected to this control member 18, a pressure regulator 23 to electric control as well as a control condenser electric 24, both controlled by the control 18.
  • FIG. 2 illustrates a simplified diagram of a ink quality control, according to the invention, in such a printer.
  • a comparator 30 creates a difference between the set pressure obtained using the output signal from the temperature 21 and the effective pressure of operation obtained at the output of the pressure sensor 20. This pressure difference is processed by the control body 18 which, by actions appropriate such as solvent addition, ink addition, modulation of the condenser control, allows limit this pressure difference.
  • Measuring the ink temperature can be performed at the ink circuit. However the vast majority of pressure drop (more than 90% of the set pressure) being associated with the nozzle, a measurement of the ink temperature at the print head (nozzle support) provides even more precise information.
  • the jet speed is varied around its nominal speed and the values P funct , V and T are recorded.
  • This start up step lasts only a few seconds, if although during this short period the temperature of the ink remains practically constant and is worth T starting (or T d ).
  • the method of the invention makes it possible to find all of the characteristics a, b, ⁇ P for the ink circuit and ⁇ and ⁇ for the ink used.
  • the method of the invention comprises several embodiments, illustrated in FIG. 3, which will be explained below.
  • a first embodiment (I) five independent values of the couple (P funct , V) are used to determine these five characteristics a, b, ⁇ P, ⁇ and ⁇ .
  • Five measurements of the operating pressure P funct are made for five values of the jet speed V centered on the nominal speed speed.
  • Such an embodiment is very dependent on the precision of the measurements of P funct and V.
  • this calculated ⁇ P stat is necessary and sufficient for establishing the pressure setpoint.
  • the low temperature range (typically less than 10 ° C) is associated with a high viscosity of the fluid.
  • a viscosity results in a difficulty of recovering the ink not used for printing and in an evolution of the quality of the breakage which can cause a drift in the performance of the printing.
  • we can adapt the laws ( ⁇ (T), ⁇ (T)), for example by choosing ⁇ (T) ⁇ (10) for T ⁇ 10 ° C.
  • the ink concentration at constant concentration is transformed into ink with constant viscosity.
  • P deposit (T) ⁇ Pstat + a ⁇ ⁇ not (T) ⁇ V 2 + b ⁇ ⁇ not (T) ⁇ V
  • the main advantage of this second mode of achievement is the total determination of all settings.
  • the jet speed is varied around the nominal speed and then as many ⁇ P are calculated as there are torque values (P funct , V).
  • the average ⁇ P value obtained by averaging the ⁇ P (measured) makes it possible to reduce the errors associated in particular with the measurement of the speed V.
  • ⁇ P is then obtained with the formula of the average:
  • the machine then builds its own pressure setpoint by assimilating its initial start-up ink to the reference ink.
  • the relation, allowing to obtain the calculated value ⁇ P involves ( ⁇ ref (T), ⁇ ref (T)) which are information concerning the reference ink developed by the formulator and whose characteristics have been measured in the laboratory .
  • the ink produced in quantity and industrially is, in fact, suitable for the use of a printer but has significantly different characteristics.
  • the calculated ⁇ P value mainly represents the pressure term associated with the difference in level, but it also reflects the difference in characteristics between the reference ink and the ink used by the machine. By assimilating the ink used by the machine to the reference ink, ⁇ P calculated directly translates the difference in level.
  • P ref setpoint a ⁇ ⁇ ref (T) ⁇ V 2 + b ⁇ ⁇ ref (T) ⁇ V + ⁇ ref (T) ⁇ g ⁇ H
  • P setpoint a ⁇ ⁇ ref (T) ⁇ V 2 + b ⁇ ⁇ ref (T) ⁇ V + ⁇ P calculated
  • ⁇ P i ⁇ ink (T d ) ⁇ g ⁇ H + a ⁇ V i 2 ⁇ ( ⁇ ink (T d ) - ⁇ ref (T d )) + b ⁇ V i ⁇ ( ⁇ ink (T d ) - ⁇ ref (T d )).
  • ⁇ P calculated ⁇ ink (T d ) ⁇ g ⁇ H + a ⁇ V 2 ⁇ ( ⁇ ink (T d ) - ⁇ ref (T d )) + b ⁇ V ⁇ ( ⁇ ink (T d ) - ⁇ ref (T d )).
  • the calculated ⁇ P value therefore reflects both the difference in altitude between the print head and the ink circuit but also the difference in the characteristics of the ink.
  • the information concerning the characteristics of the ink used can be contained in an electronic label, as in the document referenced [4] associated with the container of the ink.
  • This electronic label may also contain other relevant information concerning the ink (expiry date, quantity of liquid in the container, ink reference, etc.).
  • the characteristics ( ⁇ ref (T), ⁇ ref (T)) and ( ⁇ ink (T), ⁇ ink (T)) can be read automatically by the machine.
  • the characteristics of the reference ink being known to the machine, it is then possible to easily calculate ⁇ P ink , the calculation of ⁇ P calculated remains unchanged.
  • the difference ( ⁇ P calculated - ⁇ P ink ) gives directly ⁇ P H.
  • This setpoint used by the servo-control cancels the value of ⁇ P ink .
  • the machine then manufactures a reference ink from a substantially different ink.
  • a third variant (III.c) of the third mode of operation we know the elevation, the operator can for example inform the machine on the exact position of the head relative to the machine at the time of startup, the instruction then being known without any calculation.
  • P deposit a ⁇ ⁇ ref (T) ⁇ V 2 + b ⁇ ⁇ ref (T) ⁇ V + ⁇ ref (T) ⁇ g ⁇ H
  • ⁇ P ink ⁇ P calculated - ⁇ P H. This term can be reduced to 0 by servo control, so that the machine will manufacture the reference ink from a similar ink (but not identical). In addition during a restart of the machine with an unchanged elevation condition (no change in the installation of the machine) we can calculate this term ⁇ P ink and alert the user if the value of this term exceeds a limit given.
  • the method of the invention allows to obtain maximum autonomy, to calculate the actual elevation between the machine and the print head, and to change the characteristics of the ink used towards those of the reference ink.
  • This process makes it possible to precisely compensate for differences in 1% on density and 10% on viscosity industrially produced ink.
  • the process of the invention makes it possible to establish the setpoint for enslaving the quality of the ink, reducing the difference between the setpoint pressure and that of operation.
  • the servo can be active to manage properly adding solvent, decreasing the solvent concentration being controlled by natural evaporation.
  • the servo has a limited possibility of adding ink to reduce the solvent concentration but the amount of solvent to evaporate remaining unchanged, only the deviation from concentration decreases.
  • the internal volume of the circuit being limited, adding ink cannot be done only with a limited and limited amount to avoid the risk of one of the tanks overflowing.
  • adding ink is therefore not in a good way.
  • FIG. 4 illustrates the recovery of solvent with a Peltier effect condenser 24, with an effect cell Peltier 35, a cold surface 36, a hot surface (radiator) 37, air outlet 38, solvent outlet recovered 39, pump supply 40, ink return recovered 41, the power supply 42 of the condenser 24.
  • the different embodiments of the process of the invention allow the establishment of the operating pressure setpoint. This instruction established when the machine is started for the first time.
  • the re-use of the same operating mode when restarting the machine has several advantages. We can in particular verify the characteristics of ink when restarting the machine and, possibly alert the printer user on a drift in the quality of the ink.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP00401140A 1999-04-28 2000-04-25 Tintenstrahldrucker und Verfahren zur Kontrolle der Tintenqualität in einem solchen Drucker Withdrawn EP1048470A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9905362A FR2792874B1 (fr) 1999-04-28 1999-04-28 Imprimante a jet d'encre et procede de gestion de la qualite de l'encre d'une telle imprimante
FR9905362 1999-04-28

Publications (1)

Publication Number Publication Date
EP1048470A1 true EP1048470A1 (de) 2000-11-02

Family

ID=9544951

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Application Number Title Priority Date Filing Date
EP00401140A Withdrawn EP1048470A1 (de) 1999-04-28 2000-04-25 Tintenstrahldrucker und Verfahren zur Kontrolle der Tintenqualität in einem solchen Drucker

Country Status (6)

Country Link
US (1) US6450601B1 (de)
EP (1) EP1048470A1 (de)
JP (1) JP2000343710A (de)
CN (1) CN1188278C (de)
CA (1) CA2306680A1 (de)
FR (1) FR2792874B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2995462A1 (de) 2014-09-04 2016-03-16 Markem-Imaje Holding Verfahren zur verwaltung der tintenqualität eines tintenstrahldruckers bezüglich der temperatur
EP3098075A1 (de) 2015-05-29 2016-11-30 Dover Europe Sàrl Verfahren und vorrichtung zur verwaltung der tintenqualität in einem tintenstrahldrucker

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3960083B2 (ja) * 2002-03-06 2007-08-15 セイコーエプソン株式会社 ヘッド駆動装置及び方法、液滴吐出装置、ヘッド駆動プログラム、並びにデバイス製造方法及びデバイス
KR100490360B1 (ko) * 2002-10-01 2005-05-17 일리정공 주식회사 퍼지장치가 결합된 잉크젯 프린터/플로터용 차압보정장치
KR100490359B1 (ko) * 2002-10-01 2005-05-19 일리정공 주식회사 잉크젯 프린터/플로터용 차압보정방법 및 차압보정장치
US7125110B2 (en) * 2004-02-17 2006-10-24 Fuji Xerox Co., Ltd. Systems for regulating temperature in fluid ejection devices
US7278703B2 (en) 2004-04-19 2007-10-09 Hewlett-Packard Development Company, L.P. Fluid ejection device with identification cells
US7416292B2 (en) * 2005-06-30 2008-08-26 Xerox Corporation Valve system for molten solid ink and method for regulating flow of molten solid ink
GB0723475D0 (en) * 2007-11-29 2008-01-09 Videojet Technologies Inc Ink jet printing
GB201510456D0 (en) * 2015-06-15 2015-07-29 Videojet Technologies Inc Apparatus for printing
FR3049343A1 (fr) * 2016-03-22 2017-09-29 Dover Europe Sarl Dispositif de mesure de debit et de viscosite et son utilisation dans une imprimante
WO2018147831A1 (en) * 2017-02-07 2018-08-16 Hewlett-Packard Development Company, L.P. Calibrating printing pens of print head assemblies
CN110239216B (zh) * 2019-07-25 2024-05-24 北京博源恒芯科技股份有限公司 基于can-lin协议的负压墨路系统
CN114302772B (zh) * 2019-08-30 2023-07-28 京瓷株式会社 循环装置
CN115366547B (zh) * 2021-08-19 2023-12-01 广东聚华印刷显示技术有限公司 补偿溶剂体积确定方法、喷墨打印控制方法及系统

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Publication number Priority date Publication date Assignee Title
JPS59204563A (ja) * 1983-05-07 1984-11-19 Ricoh Co Ltd インクジエツト記録装置におけるインク圧力制御方法
DE3405164A1 (de) * 1984-02-14 1985-08-22 Olympia Werke Ag, 2940 Wilhelmshaven Tintenvorratsbehaelter fuer tintenschreibeinrichtungen
EP0287372A1 (de) * 1987-04-14 1988-10-19 Domino Printing Sciences Plc Steuervorrichtung für einen kontinuierlich arbeitenden Farbstrahldrucker
EP0536000A2 (de) * 1991-10-03 1993-04-07 Videojet Systems International, Inc. Tintentropfenmarkierung und Überwachung der Tropfenqualität

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
GB8530885D0 (en) * 1985-12-16 1986-01-29 Domino Printing Sciences Plc Ink jet printing system
FR2695704B1 (fr) * 1992-09-15 1994-10-14 Imaje Régulateur de pression pneumatique à commande électronique et procédé de régulation de pression d'un fluide utilisant un tel régulateur.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59204563A (ja) * 1983-05-07 1984-11-19 Ricoh Co Ltd インクジエツト記録装置におけるインク圧力制御方法
DE3405164A1 (de) * 1984-02-14 1985-08-22 Olympia Werke Ag, 2940 Wilhelmshaven Tintenvorratsbehaelter fuer tintenschreibeinrichtungen
EP0287372A1 (de) * 1987-04-14 1988-10-19 Domino Printing Sciences Plc Steuervorrichtung für einen kontinuierlich arbeitenden Farbstrahldrucker
EP0536000A2 (de) * 1991-10-03 1993-04-07 Videojet Systems International, Inc. Tintentropfenmarkierung und Überwachung der Tropfenqualität

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 073 (M - 368) 3 April 1985 (1985-04-03) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2995462A1 (de) 2014-09-04 2016-03-16 Markem-Imaje Holding Verfahren zur verwaltung der tintenqualität eines tintenstrahldruckers bezüglich der temperatur
US10144216B2 (en) 2014-09-04 2018-12-04 Markem-Imaje Holding Method for managing ink quality of an inkjet printer versus temperature
EP3098075A1 (de) 2015-05-29 2016-11-30 Dover Europe Sàrl Verfahren und vorrichtung zur verwaltung der tintenqualität in einem tintenstrahldrucker
EP3495147A1 (de) 2015-05-29 2019-06-12 Dover Europe Sàrl Verfahren und vorrichtung zur verwaltung der tintenqualität in einem tintenstrahldrucker
US10647122B2 (en) 2015-05-29 2020-05-12 Dover Europe Sàrl Method and device for managing ink quality in an inkjet printer

Also Published As

Publication number Publication date
FR2792874B1 (fr) 2001-06-22
JP2000343710A (ja) 2000-12-12
CA2306680A1 (fr) 2000-10-28
US6450601B1 (en) 2002-09-17
FR2792874A1 (fr) 2000-11-03
CN1273912A (zh) 2000-11-22
CN1188278C (zh) 2005-02-09

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