EP1105297B1 - Tintenstrahldrucker - Google Patents

Tintenstrahldrucker Download PDF

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Publication number
EP1105297B1
EP1105297B1 EP99936715A EP99936715A EP1105297B1 EP 1105297 B1 EP1105297 B1 EP 1105297B1 EP 99936715 A EP99936715 A EP 99936715A EP 99936715 A EP99936715 A EP 99936715A EP 1105297 B1 EP1105297 B1 EP 1105297B1
Authority
EP
European Patent Office
Prior art keywords
machine according
ink
reservoir
heads
head
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.)
Expired - Lifetime
Application number
EP99936715A
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English (en)
French (fr)
Other versions
EP1105297A1 (de
Inventor
Alain Boutet
Christophe Aliaga
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.)
Scitex Vision Ltd
Original Assignee
Scitex Vision Ltd
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
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Application filed by Scitex Vision Ltd filed Critical Scitex Vision Ltd
Priority to DE29924694U priority Critical patent/DE29924694U1/de
Publication of EP1105297A1 publication Critical patent/EP1105297A1/de
Application granted granted Critical
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Anticipated expiration legal-status Critical
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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
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
    • 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

Definitions

  • the present invention relates to a direct printing machine by projection of ink drops on a support.
  • the inkjet technique is known (see eg. FR-A-2 707 919).
  • piezoelectric ceramic print heads one chamber of which by deformation projects the ink at the outlet of the nozzles onto a support.
  • the projection of the ink can also be obtained, for certain types of ink, by heating generating the formation of a gas bubble whose expulsion causes the ink jet.
  • the relative displacements of the print head by ink jets and of the support to be printed are of small amplitude, which does not harm the quality of the print, the vacuum necessary at the output of the projection nozzles n not being affected by small displacements.
  • These technologies are however only suitable for certain specific types of inks and are not suitable for the projection of inks with high corrosive power, the use of which is sought after for the quality of the impression obtained and for its unalterable adhesion on the support or for inks revealing by ultraviolet rays.
  • the invention aims to produce a machine which can be used for direct printing, with corrosive inks, that is to say based on solvents or ultraviolet, on small or very large formats and on any type of support, especially rigid, flat or shaped.
  • corrosive inks that is to say based on solvents or ultraviolet
  • any type of support especially rigid, flat or shaped.
  • Corrosive inks cannot be loaded into known dispensing cartridges of the HEWLETT PACKARD (registered trademark) or LEXMARK (registered trademark) type, it is necessary to design a specific ink supply system with devices making it possible to maintain a vacuum of 4 millibars at the level of the projection nozzles without pressure variation detrimental to a good impression, regardless of the technical data according to which the relative movements between the heads and projection nozzles must be very rapid.
  • the heads and nozzles can be subjected to displacement speeds of 800 millimeters per second and to accelerations of 5000 millimeters per second squared, which generates a pressure variation at the level of the nozzles.
  • the present invention aims to provide a solution to this problem in the production of a direct printing machine.
  • each on-board buffer tank is divided to reduce the amplitude of the waves produced by the displacement of tanks.
  • the machine comprises a rectangle table 1 comprising a flat, horizontal plate, of rectangle shape on which the support intended to receive the print is disposed.
  • a transverse gantry 2 is movable in the X direction on the table.
  • On the gantry 2 is mounted an on-board crew 3 mobile by any known means along the Y axis and the Z axis; the X, Y and Z axes being orthogonal in space.
  • the mobile crew can therefore move in any direction on the table 1 and in height along Z relative to the latter. Its movements are controlled by a control and command unit comprising a microprocessor with associated equipment.
  • the position of the moving assembly, particularly in height, with respect to the table, is adjusted by any known type of detection system
  • the on-board crew 3 is shown in more detail in FIG. 2 with the system hydraulic.
  • the high-speed mobile on-board crew includes one or more buffer tanks 6.
  • four buffer tanks 6 are represented, each of them being dedicated to an ink color or to an ink tint used to compose a color, each of them is connected by a line of line 7 to the stationary tank 4, which includes as many chambers and lines as there are buffer tanks.
  • One or two spray heads correspond to each buffer tank downstream piezoelectric or other system ink, each head feeding its projection nozzles carried by a nozzle plate.
  • each buffer tank 6 supplies one projection head and only one.
  • the buffer tanks 6 are independent of each other and are removably mounted on the moving element. This provision, by authorizing the individual replacement of each tank, facilitates the maintenance of the whole. In the same spirit, a similar provision will be made for projection heads and associated nozzles. Another advantage in the removability of tanks 6 and projection heads lies in the improvement of the flexibility of use of the machine printing.
  • each reservoir 6 and associated projection head can now be assigned to a single color and a single ink category, this avoids the obligation of a complete cleaning of tanks and heads before replacing ink justified by chemical and / or physical incompatibility issues that may exist between inks of different categories and / or different colors.
  • the mark 8 indicates the connections of each of the heads which are supplied by a servo solenoid valve 9 downstream of each of the buffer tanks 6.
  • the distributors 9 are individually controlled by the control and command unit. By ordering solenoid valves is interrupted or communication between the buffer tanks and the associated projection heads and therefore the ink supply of the spray nozzles. These solenoid valves are controlled independently of each other other.
  • a stationary solenoid valve 10 controlled by the stationary reservoir 4 the control and command unit. By controlling each of these solenoid valves is established or interrupted the communication between the associated tanks 4 and 6 and therefore whether or not the reservoir 6 is supplied with ink.
  • tank 6 In order to detect the ink level in the tank and control the supply of ink when the level is at minimum and interrupt this supply when the level is at most, tank 6 is associated with a level detector capable of delivering two signals separate electrics, one of which is representative of a minimum level and the other of which is representative of a maximum level. This level detector is electrically connected to the unit of control and command to deliver to the latter the minimum level signals and maximum level.
  • the buffer tanks 6 can be maintained in depression by a common line 11 with means of depression 12, said line being connected to a compressor 13.
  • This means of depressurization is advantageously constituted by a venturi effect device.
  • a venturi effect device Such a device, known per se, comprises a first channel internal provided at one of its ends with a compressed air inlet mouth and according to its other end of a compressed air outlet. In this internal channel radially the end of a second channel connected by its other end to line 11. By passage of an air flow in the first channel is created in the second a suction effect generator of depression.
  • Line 11 is provided, between the compressor 13 and the venturi effect device 12, with control and adjustment means, such as filter, regulator and pressure gauge of known types and which are not described.
  • control and adjustment means such as filter, regulator and pressure gauge of known types and which are not described.
  • a branch 14 connected to line 11 is connected, by means of a controlled shutter 15, to a venturi effect device 16 which puts a reservoir 17 with vacuum valve 18 under vacuum.
  • the vacuum tank 17 is connected by a solenoid valve 19 to the system 5 for cleaning and maintaining the ink spray nozzles.
  • the venturi effect device 12 on line 11 maintains the buffer tank in depression.
  • each buffer tank 6 is equipped with its own means of depression.
  • This means of depression is made up advantageously by a venturi effect device 12 like that previously described.
  • the suction mouth of this venturi effect device is connected directly by its mouth of suction through a through hole made in the upper wall of the buffer tank 6.
  • a depression is created in the upper part of the tank 6, above the level ink.
  • the buffer tanks are supplied with ink through lines 7, the ink supply pressure being of the order of 0.1 to 0.2 bar.
  • each buffer tank 6 is supplied with ink by its own additional reservoir 34, the additional reservoir 34 being connected to the corresponding pipe 7 by the corresponding solenoid valve 10.
  • This tank additional for example of cylindrical shape, comprises a bottom wall, an envelope wall standing vertically on the back wall and a shutter cover coming to rest on the shore horizontal top of the envelope wall to close the opening which delimits said wall at this level.
  • the additional tank 34 receives the level detector device and is connected to the buffer tank 6 via a lower pipe 34a located below the minimum level ink and by an upper line 34b located above the ink level allowing respectively the ink supply to the buffer tank 6 and the balance of air pressures in both tanks.
  • the pipes 34a and 34b provide a connection rigid mechanical between the buffer tank 6 and the additional tank 34.
  • the lower part of the shell wall of the tank additional has a through hole to which the outlet outlet of the the solenoid valve 10.
  • This additional tank is therefore supplied from below; we avoid thus during the ink supply, the formation of waves and shock waves, generating ink pressure variations in the additional tank 34 and in the buffer tank 6.
  • the level detector is advantageously constituted by a float 35 and by a float position sensor 36, this sensor electrically connected to the control and control, being capable of delivering to said unit a minimum level signal and a signal maximum level.
  • This detector is carried by the cover of the additional tank 34.
  • the projection heads operate at slight depression. It is necessary for the regularity of impression that this depression remains constant around minus 4 millibars or undergo as few variations as possible, a variation of minus four to minus eight millibars being acceptable.
  • each buffer tank 6 is divided to avoid the formation of waves.
  • Figure 3 shows a sectional view of a buffer tank among the four on-board buffer tanks 6.
  • Each buffer tank 6 is preferably a cylindrical volume, the top of which is closed and the base 20 of which towards the solenoid valve and the head is restricted. To this end, the bottom wall 21 of each buffer tank has a cylindrical volume of small height and of smaller diameter than that of the tank with an outlet nozzle 22. In the cylindrical volume of each of the buffer tanks 6 is introduced a dividing device 23 which breaks it down into several small tanks and fulfills a wave breaker damping function.
  • the dividing device is a block of section corresponding to that of the internal volume of the buffer tank which is provided from top to bottom with parallel channels 24 defining as many small tanks.
  • the divider has at its base a recess 25 facilitating the circulation of the ink. It goes without saying that any other system performing a division and partitioning of the tank can be adapted.
  • Buffer tanks 6 and additional, dividers and covers are made of suitable materials, resistant to the solvents of the inks used.
  • the device for cleaning the nozzle plates and for maintaining the nozzles connected to the compressor by the branch 14 (FIG. 2) and shown diagrammatically in position in FIG. 1 is shown in detail in FIGS. 6 and 7.
  • It consists of a plate 26 of rectangular shape.
  • On this plate are reservations of rectangular shape 27.
  • In each of the reservations 27 open two channels 28 and 29 connected by pipes to the reservoir 17 in depression.
  • the reservations 27 are aligned and offset at an angle relative to their alignment axis.
  • the reservations 27 each receive a plate made of a flexible material, for example silicone.
  • the plate has two oblong parallel oblique lights.
  • a first short lumen 30 corresponds to a nozzle of the duct 28.
  • the lumen 30 is provided with two lips 31 of low height.
  • a second oblong opening 32 corresponds to the duct 29. This opening 32 has a scraping lip 33.
  • the maintenance cycle for heads and nozzles is shown in Figure 8 in solid lines, the different stages of the cycle and the movement of the head or heads being identified by the letters A, B, C, D, E, F and G .
  • A the projection head is brought to a speed V1 above the lips 31 of the light 30.
  • B the head is lowered at a speed V2 onto the lips 31.
  • C the depression at the head is interrupted; the suction is put into operation by action of the venturi effect device 16 for a time T1.
  • D the head is raised by a value of 2 millimeters above the lips 31, the suction is stopped, the depression is restarted.
  • E the head is moved at a speed V2 above the scraper lip 33.
  • F the head is raised to a speed V3.
  • the machine is equipped with a means capable of causing polymerization of the ink affixed to the support, this means possibly consisting of a source of ultraviolet light radiation oriented towards the support. Any other suitable means may be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ink Jet (AREA)
  • Coating Apparatus (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Luminescent Compositions (AREA)
  • Dot-Matrix Printers And Others (AREA)

Claims (14)

  1. Tintenstrahldrucker, der durch eine oder mehrere Druckköpfe mit Düsen auf einen auf einem Tisch (1) angeordneten Träger druckt, wobei die Maschine von Typ mit Relativbewegungen zwischen dem zu bedruckendem Träger und den Druckköpfen ist und jeder Druckkopf vorzugsweise einer Farbe oder einem Farbton gewidmet ist und der Druckkopf oder die Druckköpfe von einem oberhalb des zu bedruckendem Trägers mit den drei zueinander senkrechten Raumachsen X, Y und Z beweglichen Wagen (3) getragen sind, dadurch gekennzeichnet, daß jeder der Druckköpfe mit einem Pufferbehälter (6) versehen ist, der abnehmbar, vom Druckkopf trennbar und vom beweglichen Wagen getragen ist, und daß der Druckkopf oder die Druckköpfe und ihre Pufferbehälter (6) unter Unterdruck gehalten werden, um das Funktionieren des Druckkopfes oder der Druckköpfe zu gewährleisten.
  2. Tintenstrahldrucker nach Anspruch 1, dadurch gekennzeichnet, daß der bewegliche Wagen (3) die Druckköpfe und die Düsen zyklisch über ein Reinigungs- und Wartungssystem (5) bringt, das durch Saugen die Düsen reinigt und sie betriebsbereit macht und durch Abstreifen die überschüssigen Tropfen beseitigt und es ermöglicht, die Düsen in gutem Funktionszustand zu erhalten.
  3. Tintenstrahldrucker nach Anspruch 1, dadurch gekennzeichnet, daß das Innenvolumen jedes angesetzten Pufferbehälters unterteilt ist, um die Amplitude von Wellen zu verringern, welche durch die Verschiebungen der Behälter erzeugt werden.
  4. Tintenstrahldrucker nach Ansprüchen 1 und 2, dadurch gekennzeichnet, daß ein Kompressor (13), der durch eine Leitung (11) mit jedem Pufferbehälter (6) verbunden ist. mindestens eine Venturi-Vorrichtung (12) aufweist, welche die Pufferbehälter unter Unterdruck setzt, wobei die Pufferbehälter von dem Behälter oder den Behältern (4) durch Leitungen (7) mit Tinte versorgt werden und eine Abzweigung (14) der Leitung (11) mittels einer Venturi-Vorrichtung (16) mit der Vorrichtung (5) zur Reinigung der Köpfe und Düsen verbunden ist.
  5. Tintenstrahldrucker nach Ansprüchen 1 und 4, dadurch gekennzeichnet, daß ein Behälter (17) zwischen der Venturi-Vorrichtung (16) und der Reinigungsvorrichtung (5) unter Unterdruck gesetzt wird.
  6. Tintenstrahldrucker nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß jeder Pufferbehälter (6) mit seiner eigenen Venturi-Vorrichtung (12) ausgerüstet ist.
  7. Tintenstrahldrucker nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß jeder Pufferbehälter (6) durch einen Zusatzbehälter (34) mit Tinte versorgt wird, der mit einer Niveau-Fühlervorrichtung ausgerüstet und mit dem Pufferbehälter (6) verbunden ist durch eine untere Leitung, die unterhalb des Mindestniveaus der Tinte liegt, und durch eine obere Leitung, die oberhalb des Tintenniveaus liegt, welche jeweils die Tintenversorgung des Pufferbehälters (6) und den Ausgleich der Luftdrücke in zwei Behältern (6) und (34) ermöglichen.
  8. Tintenstrahldrucker nach Ansprüchen 1 und 2, dadurch gekennzeichnet, daß das Reinigungssystem für jeden Druckkopf und/oder jede Düsenplatte ein Langloch (30) zum Saugen und ein Langloch (32) zum Abblasen des Rasters aufweist.
  9. Tintenstrahldrucker nach Ansprüchen 2 und 8, dadurch gekennzeichnet, daß Sauglangloch (30) mit Lippen (31) versehen ist.
  10. Tintenstrahldrucker nach Ansprüchen 2, 8 und 9, dadurch gekennzeichnet, daß das Langloch (32) mit einer Abstreiflippe (33) versehen ist.
  11. Tintenstrahldrucker nach Ansprüchen 1 und 2, 8, 9, dadurch gekennzeichnet, daß beim Wartungszyklus jeder Druckkopf die Stufe des Saugens, Abstreifens und Abblasens eines Rasters durchläuft.
  12. Tintenstrahldrucker nach Ansprüchen 1 und 3, dadurch gekennzeichnet, daß das Innenvolumen jedes angesetzten Behälters eine Unterteilungsvorrichtung aufnimmt.
  13. Tintenstrahldrucker nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß er hinter den Druckköpfen mit einer Vorrichtung ausgerüstet ist, welche eine Polymerisation der auf dem Träger angebrachten Tinte bewirken kann.
  14. Tintenstrahldrucker nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Pufferbehälter (6) von einem oder mehreren in fester Position angeordneten Behältern (4) durch Versorgungsleitungen (7) versorgt werden, an denen jeweils ein geregelter Elektroverteiler (10) montiert ist, der durch die Kontroll-Steuereinheit gesteuert ist, so daß durch die Steuerung jedes dieser Elektroverteiler die Verbindung zwischen den einander zugeordneten Behältern (4 und 6) hergestellt oder unterbrochen wird und damit der Behälter (6) mit Tinte versorgt wird oder nicht versorgt wird.
EP99936715A 1998-08-10 1999-08-10 Tintenstrahldrucker Expired - Lifetime EP1105297B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29924694U DE29924694U1 (de) 1998-08-10 1999-08-10 Tintenstrahldrucker

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9810250 1998-08-10
FR9810250A FR2782032B1 (fr) 1998-08-10 1998-08-10 Machine d'impression directe par projection de gouttes d'encre sur un support
PCT/FR1999/001963 WO2000009339A1 (fr) 1998-08-10 1999-08-10 Machine d'impression directe par projection de gouttes d'encre sur un support

Publications (2)

Publication Number Publication Date
EP1105297A1 EP1105297A1 (de) 2001-06-13
EP1105297B1 true EP1105297B1 (de) 2003-05-21

Family

ID=9529565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99936715A Expired - Lifetime EP1105297B1 (de) 1998-08-10 1999-08-10 Tintenstrahldrucker

Country Status (11)

Country Link
US (1) US6543877B1 (de)
EP (1) EP1105297B1 (de)
JP (1) JP2002522279A (de)
CN (1) CN1118376C (de)
AT (1) ATE240841T1 (de)
AU (1) AU5171099A (de)
DE (1) DE69908142T2 (de)
ES (1) ES2204148T3 (de)
FR (1) FR2782032B1 (de)
IL (1) IL141343A (de)
WO (1) WO2000009339A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020117214A1 (en) * 2018-12-04 2020-06-11 Hewlett-Packard Development Company, L.P. Extraction reservoir-triggered fluid extraction

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GB9910313D0 (en) 1999-05-05 1999-06-30 Cambridge Consultants Fluid-pressure controlled ink pressure regulator
EP1188568B1 (de) 2000-03-27 2006-05-03 Seiko Epson Corporation Tintenstrahldrucker
ATE402017T1 (de) 2001-02-09 2008-08-15 Seiko Epson Corp Tintenstrahlaufzeichnungsvorrichtung, steuerungs- und tintennachfüllsverfahren in der vorrichtung ausgeführt, tintenversorgungssystem in der vorrichtung, und verwaltungsverfahren der von dem system versorgt tintenmenge
FR2827216B1 (fr) * 2001-07-13 2008-03-21 Leroux Gilles Sa Dispositif d'impression numerique par jet d'encre et reservoir d'encre
JP4968071B2 (ja) * 2005-05-13 2012-07-04 ブラザー工業株式会社 インクジェット記録装置
US20070070132A1 (en) * 2005-09-27 2007-03-29 Fan-Cheung Sze Inkjet delivery module
US20080204501A1 (en) * 2006-12-01 2008-08-28 Shinichi Kurita Inkjet print head pressure regulator
WO2009029890A1 (en) * 2007-08-29 2009-03-05 Applied Materials, Inc. Methods and apparatus for modular print head and adapter and rotation thereof with inkjet printer systems
US8342661B2 (en) * 2007-12-19 2013-01-01 Canon Finetech Inc. Ink supplying apparatus, inkjet printing apparatus, inkjet printing head, ink supplying method and inkjet printing method
US7731318B2 (en) * 2008-02-28 2010-06-08 Digital Photonics Corporation Pneumatic ink-jet system
DE102008012279B4 (de) * 2008-03-03 2011-08-25 Digital Photonics Corp., Tapei Pneumatisches Tintenstrahlsystem
WO2009150640A1 (en) * 2008-06-10 2009-12-17 Hewlett-Packard Industrial Printing Ltd. Inkjet system with backpressure capacitor
US8622513B2 (en) * 2011-04-18 2014-01-07 Xerox Corporation Using low pressure assist (LPA) to enable printhead maintenance system simplification
US9180674B2 (en) 2013-02-08 2015-11-10 R.R. Donnelley & Sons Company System and method for supplying ink to an inkjet cartridge
CN103738055B (zh) * 2014-01-02 2015-10-14 长乐芯聚电子科技研究所 便携喷墨打字机
CN207291314U (zh) 2016-05-09 2018-05-01 R.R.当纳利父子公司 油墨供应单元

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020117214A1 (en) * 2018-12-04 2020-06-11 Hewlett-Packard Development Company, L.P. Extraction reservoir-triggered fluid extraction
US11413874B2 (en) 2018-12-04 2022-08-16 Hewlett-Packard Development Company, L.P. Extraction reservoir-triggered fluid extraction

Also Published As

Publication number Publication date
FR2782032A1 (fr) 2000-02-11
DE69908142D1 (de) 2003-06-26
CN1118376C (zh) 2003-08-20
DE69908142T2 (de) 2004-04-08
CN1322168A (zh) 2001-11-14
AU5171099A (en) 2000-03-06
EP1105297A1 (de) 2001-06-13
FR2782032B1 (fr) 2000-10-06
IL141343A (en) 2005-06-19
IL141343A0 (en) 2002-03-10
JP2002522279A (ja) 2002-07-23
ATE240841T1 (de) 2003-06-15
WO2000009339A1 (fr) 2000-02-24
ES2204148T3 (es) 2004-04-16
US6543877B1 (en) 2003-04-08

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