WO2005002860A1 - Imprimante a jet d'encre a commande de pression d'encre - Google Patents

Imprimante a jet d'encre a commande de pression d'encre Download PDF

Info

Publication number
WO2005002860A1
WO2005002860A1 PCT/NL2004/000498 NL2004000498W WO2005002860A1 WO 2005002860 A1 WO2005002860 A1 WO 2005002860A1 NL 2004000498 W NL2004000498 W NL 2004000498W WO 2005002860 A1 WO2005002860 A1 WO 2005002860A1
Authority
WO
WIPO (PCT)
Prior art keywords
ink
ink jet
conduit
jet printer
air
Prior art date
Application number
PCT/NL2004/000498
Other languages
English (en)
Inventor
Bernardus Petrus Paulus Morskate
Original Assignee
Osiris Technology B.V.
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 Osiris Technology B.V. filed Critical Osiris Technology B.V.
Priority to DE602004010125T priority Critical patent/DE602004010125T2/de
Priority to EP04748724A priority patent/EP1641622B1/fr
Publication of WO2005002860A1 publication Critical patent/WO2005002860A1/fr

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
    • B41J2/17566—Ink level or ink residue control
    • 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 invention also relates to a continuous ink jet printer which is embodied such that the ink jet heads generate ink droplets continuously.
  • the droplets which must not get onto the substrate, for instance paper, textile or tin, are collected and fed back to the ink circuit .
  • a properly functioning ink circuit must satisfy three important requirements. (1) The ink must be fed in the correct manner to the or each ink jet head. (2) In the case of a continuous ink jet printer the ink must be fed back again from the heads to the ink circuit in the correct manner. (3) The ink circuit must be adapted such that it enables the user to change colour in economically responsible manner.
  • the ink circuit must therefore be able to eliminate the foam formation.
  • Sub (3) Most ink jet printers are adapted to print in only one colour, i.e. black. For the printing of patterns however, it is necessary to change colour very regularly. This means in practice that the ink circuit with the ink jet heads must be flushed out with the new colour until all ink in the ink circuit is completely replaced by the new colour. In order to have this process take place as economically as possible, the following aspects are important: * The volume of the ink circuit must be as small as possible.
  • the system may not have any blind conduits or dead spaces.
  • the pressure of the system must be kept as stable as possible, for instance within ⁇ 0.03%.
  • the ink jet printer according to the invention to be specified hereinbelow is capable of realizing the above stated objectives.
  • a pump and an air buffer The pump is used to bring to pressure and transport the ink. If however only a pump is used, a number of problems occur:
  • the different ink jet heads can be switched on and switched off. This means a jump in the ink flow rate.
  • the pump needs a little time to adjust its rotation speed and output, whereby a pressure fluctuation is created.
  • the invention provides an ink jet printer which is able to completely eliminate the pulsations of the pump, to compensate jumps in the flow rate, to hold the pressure constant within extremely close tolerances and which can eliminate air inclusions.
  • the invention provides an ink jet printer of the type stated in the preamble, which printer is characterized by: a buffer vessel which is arranged in the second conduit and of which the infeed is located higher than the outfeed and the -ink level is situated at a height between the height of the infeed and the height of the outfeed; an air tank connecting above the ink level to the buffer vessel; and pressure adjustment means for adjusting the air pressure in the air tank by means of a control unit (CPU) and thereby adjusting, in particular holding constant within chosen tolerances, the height of the ink level in the buffer vessel.
  • the air tank can for instance have a volume of five litres.
  • the volume of the buffer vessel is not of any technical significance per se; the buffer vessel can be considerably smaller than the air tank.
  • the basis of the invention is a control which adjusts the pump in continuously regulating manner such that the ink level in the buffer vessel always remains the same within for instance ⁇ 1 mm.
  • 10 m water column corresponds to 1 bar of pressure.
  • the pressure in the ink circuit can thus remain the same within + 100 ⁇ bar. If the pressure tank is now brought to pressure from an external pressure source, the pump will begin to work increasingly harder to compensate the increased flow rate.
  • the pressure in the ink circuit is proportional to the jet speed. By measuring the jet speed the air pressure in the tank can be set to exactly the correct pressure.
  • the air tank operates as a spring with a very low spring constant.
  • the ink jet printer has the special feature that the number of ink jet heads amounts to more than one and the second conduit branches into a number of sub-conduits which each connect to a respective ink jet head and which all have substantially identical flow parameters for the ink, such as diameter, length and flow resistance.
  • the ink fed to all heads is processed under exactly the same conditions. This is essential for the very high print quality that is sought after and of which the ink jet printer according to the invention is capable. It is further essential that the pressure at which the ink is fed to the or each ink jet head remains constant within extremely close tolerances in accordance with a preselected value.
  • the ink jet printer can have the following aspects.
  • a first aspect is that level measuring means for measuring the ink level are added to the buffer vessel, which level measuring means feed level signals to the CPU, on the basis of -which the pressure adjustment means set the air pressure in the air tank.
  • the level measuring means comprise a level sensor of the type with a float and a position sensor co-acting therewith, for instance a magnet present on the float and a magnetostrictive sensor disposed fixedly relative to the buffer vessel.
  • pressure measuring means are added to the buffer vessel, which pressure measuring means feed pressure signals to the CPU, on the basis of which the pressure adjustment means set the air pressure in the air tank.
  • FIG. 1 shows on the left-hand side two supply container systems 60, 61. These comprise two carriages 78 and 79 respectively which in a manner to be described below are movable reciprocally as according to arrows 80 by means of actuators 19. Supply containers 1, 76 for ink are placed on carriages 79.
  • each supply container 1 76 Placed in each supply container 1, 76 is a first conduit 5 which carries a non-return valve 8 on its underside at or very close to the bottom of the relevant supply container. When conduit 5 with non-return valve 8 is removed from the ink, this valve closes or remains closed, whereby air inclusions cannot occur. Ink can be pumped up through conduit 5 by means of a pump 6 controlled by a central control unit or CPU 36.
  • the choice between supply container 1 or 76 is determined by the mutually exclusive open or closed positions of two selector valves 56, 57. These will be discussed later with reference to Fig. 2 and 3.
  • the pump 6 is a gear pump, although in principle it can be of any suitable type provided it generates a sufficient pressure and a sufficient ink flow rate.
  • FIG. 1 This view shows that valves 56, 57 and 58, 59 respectively are connected pairwise to each other as a unit.
  • the alternating valve system 7 also carries buffer vessel 75 having on the top side the Keller 35X pressure sensor and on the underside the Balluff BTL-5 magnetostrictive level sensor.
  • buffer vessel 75 having on the top side the Keller 35X pressure sensor and on the underside the Balluff BTL-5 magnetostrictive level sensor.
  • a piston rod 86 the piston operates a rubber-elastic valve element 87 with a membrane 88.
  • the membrane In the closed position of the valve the membrane has the spherical, downward directed closing position drawn for valve 56, in which it closes openings 89, 90 in a hollow spherical valve seat.
  • the identical valve element 91 of valve 57 is retracted and has the shown open position in which it mutually connects openings 92 and 90.
  • control takes place such that the operation of the two valves takes place in exactly complementary manner.
  • Fig. 4 finally shows the internal structure of filter 53. As will be apparent from the drawing, the filter is of the candle type.

Landscapes

  • Ink Jet (AREA)

Abstract

L'invention concerne une imprimante à jet d'encre destinée, par exemple, à imprimer des tissus, du papier, des emballages tels que des emballages alimentaires du type boîtes en carton, boîtes alimentaires, briques de lait ou analogue, qui a un circuit d'encre comprenant au moins un récipient d'alimentation (1) pour encre ; une première pompe (6) s'y reliant par le biais d'un premier conduit (62) ; au moins une tête à jet d'encre (12) commandée électriquement s'y reliant par le biais d'un second conduit (73, 74) ; une cuve tampon (75) placée dans le second conduit et dont l'alimentation (33) est située au-dessus de la sortie (34), le niveau d'encre (35) étant situé à une hauteur entre celle de l'alimentation et celle de la sortie ; un réservoir d'air (10) se reliant à la cuve tampon au-dessus du niveau d'encre ; et un moyen de réglage de la pression (21) qui règle la pression d'air dans ledit réservoir, ce qui permet de maintenir le niveau d'encre à une hauteur constante dans les limites choisies.
PCT/NL2004/000498 2003-07-08 2004-07-08 Imprimante a jet d'encre a commande de pression d'encre WO2005002860A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE602004010125T DE602004010125T2 (de) 2003-07-08 2004-07-08 Tintenstrahldrucker und tintendruckkontrolle
EP04748724A EP1641622B1 (fr) 2003-07-08 2004-07-08 Imprimante a jet d'encre a commande de pression d'encre

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1023848 2003-07-08
NL1023848 2003-07-08

Publications (1)

Publication Number Publication Date
WO2005002860A1 true WO2005002860A1 (fr) 2005-01-13

Family

ID=33563086

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2004/000498 WO2005002860A1 (fr) 2003-07-08 2004-07-08 Imprimante a jet d'encre a commande de pression d'encre

Country Status (5)

Country Link
EP (1) EP1641622B1 (fr)
AT (1) ATE378185T1 (fr)
DE (1) DE602004010125T2 (fr)
ES (1) ES2297447T3 (fr)
WO (1) WO2005002860A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1691177A1 (fr) * 2005-02-11 2006-08-16 Mutoh Europe N.V. Système d'identification d'une encre et de mesure de niveau de ladite encre dans un réservoir avec des capteurs capacitifs
EP1841597A2 (fr) * 2005-01-11 2007-10-10 Jemtex Ink Jet Printing Ltd. Imprimante a jet d'encre et procede de commande
EP2098372A1 (fr) * 2008-03-07 2009-09-09 Agfa Graphics N.V. Système d'alimentation en encre sans pompe pour imprimante à jet d'encre dotée d'un système de recyclage d'encre
WO2014045128A3 (fr) * 2012-09-24 2014-06-26 Funai Electric Co., Ltd. Appareil de détection de niveau de liquide et procédé d'utilisation de ce dernier pour des systèmes d'impression à jet d'encre
US9204902B2 (en) 2007-10-23 2015-12-08 Zimmer Spine S.A.S Bone fixation tensioning tool and method
JP2016055235A (ja) * 2014-09-08 2016-04-21 芝浦メカトロニクス株式会社 塗布液供給装置、塗布装置及び塗布液供給方法
US9694591B2 (en) 2012-09-24 2017-07-04 Funai Electric Co., Ltd. Fluid level sensing apparatus
JP2019104146A (ja) * 2017-12-11 2019-06-27 ローランドディー．ジー．株式会社 インクジェットプリンタおよびインクジェットプリンタにおけるインク経路のインク流量調整方法
CN113195233B (zh) * 2018-10-16 2023-11-03 图像电子公司 高稳定性油墨输送系统以及相关的打印系统和方法
FR3136388A1 (fr) * 2022-06-14 2023-12-15 Exel Industries Installation d’application de produit de revêtement et procédé de commande d’une telle installation

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150165782A1 (en) * 2013-10-21 2015-06-18 Aps Engineering Digital printing system having a modular and reliable ink delivery system
DE102016100770A1 (de) * 2016-01-19 2017-07-20 Gemü Gebr. Müller Apparatebau Gmbh & Co. Kommanditgesellschaft Ventilsystem
DE102019130578A1 (de) * 2019-11-13 2021-05-20 Heidelberger Druckmaschinen Ag Vorrichtung zum zirkulierenden Versorgen mehrerer Druckköpfe mit Tinte
DE102020107586A1 (de) * 2020-03-19 2020-12-10 Heidelberger Druckmaschinen Aktiengesellschaft Verfahren zum Betreiben einer Vorrichtung für das zirkulierende Versorgen mehrerer Tinten-Druckköpfe einer Tinten-Druckmaschine mit flüssiger Tinte

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4067020A (en) * 1976-09-20 1978-01-03 A. B. Dick Company Noninterrupt ink transfer system for ink jet printer
US4149172A (en) * 1974-12-20 1979-04-10 Siemens Aktiengesellschaft Ink supply system for piezoelectrically operated printing jets
FR2618727A1 (fr) * 1987-07-31 1989-02-03 Ricard Claude Imprimantes a jet d'encre comprenant un collecteur d'aspiration et un collecteur connecte a un reservoir de stockage de gaz et vapeurs comprimes
EP0714779A2 (fr) * 1994-11-30 1996-06-05 Canon Kabushiki Kaisha Appareil d'impression à jet d'encre
US6095643A (en) * 1998-05-07 2000-08-01 Lexmark International, Inc. Refillable disposable inkjet cartridge with foam-filled and free ink reservoirs
US20030007049A1 (en) * 2001-07-06 2003-01-09 Brother Kogyo Kabushiki Kaisha Ink jet head having buffer tank in fluid communication with ink circulation pathway
WO2003006247A1 (fr) * 2001-07-13 2003-01-23 Gilles Leroux S.A. Dispositif d'impression numerique par jet d'encre et reservoir d'encre

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4149172A (en) * 1974-12-20 1979-04-10 Siemens Aktiengesellschaft Ink supply system for piezoelectrically operated printing jets
US4067020A (en) * 1976-09-20 1978-01-03 A. B. Dick Company Noninterrupt ink transfer system for ink jet printer
FR2618727A1 (fr) * 1987-07-31 1989-02-03 Ricard Claude Imprimantes a jet d'encre comprenant un collecteur d'aspiration et un collecteur connecte a un reservoir de stockage de gaz et vapeurs comprimes
EP0714779A2 (fr) * 1994-11-30 1996-06-05 Canon Kabushiki Kaisha Appareil d'impression à jet d'encre
US6095643A (en) * 1998-05-07 2000-08-01 Lexmark International, Inc. Refillable disposable inkjet cartridge with foam-filled and free ink reservoirs
US20030007049A1 (en) * 2001-07-06 2003-01-09 Brother Kogyo Kabushiki Kaisha Ink jet head having buffer tank in fluid communication with ink circulation pathway
WO2003006247A1 (fr) * 2001-07-13 2003-01-23 Gilles Leroux S.A. Dispositif d'impression numerique par jet d'encre et reservoir d'encre

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1841597A2 (fr) * 2005-01-11 2007-10-10 Jemtex Ink Jet Printing Ltd. Imprimante a jet d'encre et procede de commande
EP1841597A4 (fr) * 2005-01-11 2010-01-27 Jemtex Ink Jet Printing Ltd Imprimante a jet d'encre et procede de commande
EP1691177A1 (fr) * 2005-02-11 2006-08-16 Mutoh Europe N.V. Système d'identification d'une encre et de mesure de niveau de ladite encre dans un réservoir avec des capteurs capacitifs
US9204902B2 (en) 2007-10-23 2015-12-08 Zimmer Spine S.A.S Bone fixation tensioning tool and method
EP2098372A1 (fr) * 2008-03-07 2009-09-09 Agfa Graphics N.V. Système d'alimentation en encre sans pompe pour imprimante à jet d'encre dotée d'un système de recyclage d'encre
WO2009109342A1 (fr) * 2008-03-07 2009-09-11 Agfa Graphics Nv Système d'alimentation en encre sans pompe, pour imprimante à jet d'encre avec encre
US8292385B2 (en) 2008-03-07 2012-10-23 Agfa Graphics Nv Ink supply system without pump, for ink jet printer with ink recirculation system
CN101959690B (zh) * 2008-03-07 2013-07-03 爱克发印艺公司 具有墨水再循环系统的喷墨打印机的无泵墨水供应系统
CN104768764A (zh) * 2012-09-24 2015-07-08 船井电机株式会社 液位感测装置以及将该装置用于喷墨打印系统的方法
WO2014045128A3 (fr) * 2012-09-24 2014-06-26 Funai Electric Co., Ltd. Appareil de détection de niveau de liquide et procédé d'utilisation de ce dernier pour des systèmes d'impression à jet d'encre
US9358800B2 (en) 2012-09-24 2016-06-07 Funai Electric Co., Ltd. Fluid level sensing apparatus and method of using the same for inkjet printing systems
US9694591B2 (en) 2012-09-24 2017-07-04 Funai Electric Co., Ltd. Fluid level sensing apparatus
JP2016055235A (ja) * 2014-09-08 2016-04-21 芝浦メカトロニクス株式会社 塗布液供給装置、塗布装置及び塗布液供給方法
JP2019104146A (ja) * 2017-12-11 2019-06-27 ローランドディー．ジー．株式会社 インクジェットプリンタおよびインクジェットプリンタにおけるインク経路のインク流量調整方法
JP7027148B2 (ja) 2017-12-11 2022-03-01 ローランドディー．ジー．株式会社 インクジェットプリンタおよびインクジェットプリンタにおけるインク経路のインク流量調整方法
CN113195233B (zh) * 2018-10-16 2023-11-03 图像电子公司 高稳定性油墨输送系统以及相关的打印系统和方法
FR3136388A1 (fr) * 2022-06-14 2023-12-15 Exel Industries Installation d’application de produit de revêtement et procédé de commande d’une telle installation
EP4292717A1 (fr) * 2022-06-14 2023-12-20 Exel Industries Installation d'application de produit de revêtement et procédé de commande d'une telle installation

Also Published As

Publication number Publication date
DE602004010125T2 (de) 2008-07-31
EP1641622A1 (fr) 2006-04-05
DE602004010125D1 (de) 2007-12-27
ATE378185T1 (de) 2007-11-15
ES2297447T3 (es) 2008-05-01
EP1641622B1 (fr) 2007-11-14

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