EP3225412A1 - Flüssigkeitskartusche - Google Patents

Flüssigkeitskartusche Download PDF

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Publication number
EP3225412A1
EP3225412A1 EP17164115.2A EP17164115A EP3225412A1 EP 3225412 A1 EP3225412 A1 EP 3225412A1 EP 17164115 A EP17164115 A EP 17164115A EP 3225412 A1 EP3225412 A1 EP 3225412A1
Authority
EP
European Patent Office
Prior art keywords
base
printing
printing unit
inkjet printer
axis
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.)
Granted
Application number
EP17164115.2A
Other languages
English (en)
French (fr)
Other versions
EP3225412B1 (de
EP3225412B8 (de
Inventor
Gianpaolo Coin
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.)
Grafco Srl
Original Assignee
Grafco Srl
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 Grafco Srl filed Critical Grafco Srl
Publication of EP3225412A1 publication Critical patent/EP3225412A1/de
Publication of EP3225412B1 publication Critical patent/EP3225412B1/de
Application granted granted Critical
Publication of EP3225412B8 publication Critical patent/EP3225412B8/de
Active legal-status Critical Current
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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/12—Guards, shields or dust excluders
    • B41J29/13—Cases or covers
    • 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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/02—Framework

Definitions

  • the present invention relates to an inkjet printer.
  • Inkjet printers are normally used to reproduce images, writing and/or designs on a surface of a substrate.
  • substrate is understood as meaning any flat or three-dimensional object having at least one surface on which inkjet printing may be performed.
  • the substrate may be made of a rigid or flexible material.
  • Examples of a substrate printable using an inkjet printer are fabrics, sheets of glass or polymer material, objects made of plastic, metal, glass or wood and the like.
  • inkjet printing has replaced traditional printing methods because of the advantages which it is able to achieve in terms of speed and quality of the printed image on the substrate.
  • Inkjet printers are generally formed by a motorized base on which a gantry structure designed to support the printing head carriage is rigidly fixed.
  • the motorized base is provided with motor means suitable for moving a substrate support device along the printing path, while the printing carriage is moved along a direction transverse to the printing path by means of suitable driving means.
  • a printer control unit coordinates the movements of the support device with those of the printing carriage, ensuring that the substrate moves in a controlled manner along the printing path.
  • the structure of the printer in fact, composed of a printing unit rigidly fixed to the base, while, on the one hand, it ensures the necessary precision of the relative movements of substrate and printing head, on the other hand, gives rise to not insignificant maintenance problems.
  • Replacement may be performed solely by stopping the machine and, even though it consists of a routine maintenance operation (since it may be repeated frequently during the period of activity, i.e. working life, of the printer) it inevitably results in a long downtime of the printer.
  • the fact that the printing unit is rigidly fixed to the motorized base means that there is a limit to the maximum possible dimensions of the substrate on which the image or the design must be printed.
  • the maximum dimensions of the substrates which may be loaded onto the printer depend on the centre-to-centre distance between the supports of the printing unit and the dimensions of the support device.
  • the object of the present invention therefore is that of overcoming at least partially the drawbacks mentioned above with reference to the inkjet printers of the known type.
  • the task of the present invention is to provide an inkjet printer which is able to limit the downtime due to printing problems or malfunctions.
  • a task of the present invention is to provide an inkjet printer which is able to print an image or a design on substrates of different sizes or shapes.
  • a task of the present invention is to provide an inkjet printer which has a versatile structure and is able to ensure a high printing precision.
  • a task of the present invention is to provide an inkjet printer which may be easily modified or adapted to substrates which have a different width and/or height, without having to use specialized labour.
  • Figure 1 shows a first inkjet printer - indicated overall by 10 - which is provided in accordance with the principles of the present invention.
  • the inkjet printer 10 is designed to reproduce images, writing and/or designs on a printable surface of a substrate 12.
  • the printer 10 is preferably a printer of the industrial type, i.e. is suitable for reproducing images, writing and/or designs also on heavy and large-size substrates 12.
  • substrate is understood as meaning, as already mentioned above, any article which is made of rigid or flexible material and on which an inkjet printing operation may be performed.
  • the printer 10 comprises a base 20 and a printing unit 30 which are connected together.
  • the base 20 is provided with first motor means 22 for moving a support device 24 for the substrate 12 on guiding means 27 arranged along a sliding axis X (see Figures 8 and 10 ).
  • the base 20 has preferably a hollow box-like structure composed of four vertical walls 21 and two horizontal surfaces 23 connected together by means of mechanical support elements 31.
  • the support device 24 is designed to slide backwards and forwards, in the direction of the sliding axis X, above the upper surface 23 of the base 20.
  • the support device 24 is moved by means of a slide 25 situated underneath the upper surface 23 of the base 20.
  • connection between support device 24 and slide 25 may be performed by means of lateral support elements which are designed to slidably engage corresponding through-slits 127 provided in the upper surface 23 of the base 20.
  • the slide/support device assembly is moved by the first motor means 22 which may consist of one or more linear actuators operated by one or more electric motors.
  • the linear actuator may consist for example of a worm screw actuator 27 which has, keyed thereon, a support, for example of the recirculating ball bearing type 29, intended to be connected to the slide 25.
  • Different types of transmission systems for example a belt transmission, may be used in order to satisfy other particular requirements.
  • the support device 24 may be provided with heating means for ensuring quicker drying of the ink deposited on the substrate 12.
  • the support device 24 may also be provided with suction means for retaining small-thickness substrates, such as a sheet of paper, on the support device 24 during the various printing movements.
  • the support device 24 may be provided with raised surfaces for loading articles of clothing, such as T-shirts, shirts and trousers, and removable surfaces of various sizes.
  • the support device 24 may also consist of a driving belt intended to travel between a front roller and a rear roller which are arranged in the base.
  • the printing unit 30 comprises a casing 70 inside which the printing head 32 and driving means 36 are housed.
  • the printing head 32 is movable slidably by means of driving means 36 on guiding means 34 extending inside the casing 70 and arranged along a printing axis Y transverse to the sliding axis X.
  • the printing head 32 and the driving means 36 are of the known type and will not be described in detail in the description below.
  • the system for supplying the inks of the printing head 32 is also advantageously housed inside the casing 70.
  • This supply system since it is well-known to the person skilled in the art, is not shown in the attached figures.
  • the guiding means 34 consist of one or more guide bars 34 (see Figures 1 and 2A ).
  • the printer 10 also comprises a programmable control unit 40.
  • the control unit may be programmable in a known manner via a keyboard or via a touch screen device.
  • This control unit 40 is operatively connected to the first motor means 22 of the base 20 and to the driving means 36 of the printing unit 30.
  • control unit 40 The function performed by the control unit 40 is to coordinate the movements of the support device 24 and the printing head 32.
  • the printer 10 may comprise a signal generator, for example an encoder, able to supply to the control unit 40 of the printer the exact position of the support device 24 along the guides 27. Depending on the position detected, the control unit 40 will perform movements of the printing head 32 along the printing axis Y.
  • a signal generator for example an encoder
  • control unit After each passing movement of the printing head 32 along the axis Y, the control unit will perform a movement of the support device 24 along the sliding axis X.
  • the casing 70 of the printing unit 30 is provided with releasable connection means 50 by means of which the printing unit 30 is releasably connected to the base 20.
  • the entire printing unit 30, owing to the provision of these releasable connection means 50, may be easily separated from the base 20, with the advantages which will be described in detail below.
  • connection means 50 comprise at least one electrical connector 52, for electrically connecting the printing unit 30 to the base 20, and at least one releasable fixing element 54, for mechanically fixing, in a removable manner, the printing unit 30 to the base 20.
  • the releasable connection means 50 are designed to engage corresponding fixing seats 62, 64 provided on a mounting plate 60 of the base 20.
  • the electrical connector 52 may be a male bayonet connector designed to engage inside a corresponding female connector 62 provided in the plate 60.
  • the electrical connector 52 may be a female bayonet connector designed to engage with a corresponding male connector provided in the plate 60.
  • the electrical connector 52 By means of the electrical connector 52 it is therefore possible to connect electrically in a removable manner the printing head 32 and the driving means 36 to the base 20. In this way it is also possible to connect the printing unit 30 to the control unit 40.
  • the electrical connection between printing unit and base finally, allows the same power supply means used for the base to power also the driving means of the printing unit and any other electrical components provided in the printing unit.
  • the releasable fixing element 54 may consist for example of a tap bolt or a stud bolt intended to engage a through-hole provided in the printing unit 30 and to be screwed inside a corresponding female thread 64 provided in the plate 60.
  • connection between the screws 54 and the corresponding female threads 64 ensures, once connection has been performed, the necessary solidity of the base/printing unit assembly. On the other hand, it also ensures the correct relative positioning of the printing unit 30 and the base 20.
  • the provision of a threaded connection between printing unit 30 and base 20 allows the printing unit 30 to be easily disassembled from the base 20.
  • electrical connectors which may comprise, by way of a non-limiting example, also wireless connection technologies such as Bluetooth and WiFi transmission protocols, and different types of releasable fixing systems may be used in order to satisfy other specific requirements.
  • wireless connection technologies such as Bluetooth and WiFi transmission protocols
  • releasable fixing systems may be used in order to satisfy other specific requirements.
  • connection means 50 suitable for removably connecting the printing unit 30 to the base 20 allows a same base 20 to be used in combination with two or more printing units 30 which are identical to each other.
  • the repair or maintenance of the damaged component may therefore be carried out after disconnecting the printing unit 30 from the base 20, without therefore resulting in stoppage of the printer (except for the minimum time needed to replace the printing unit).
  • the base 20 may be used also in combination with two different printing units 30, provided that they are equipped with connection means 50 compatible with the corresponding seats provided in the base 20.
  • These printing units may for example be designed to support the printing head 32 at different heights with respect to the support device 24.
  • the casing 70 of the printing unit 30 consists preferably of a hollow gantry structure.
  • This structure comprises two support columns 71 connected by a cross member 72, inside which the printing head 32 is slidably movable.
  • the ink supplying device may also be housed inside the cross member 72 or the support columns 71.
  • the releasable fixing means 50 are provided at the end where the support columns 71 rest on the base 20.
  • Gripping means 74 designed to facilitate removal of the printing unit 30 from the base 20, once the connection means 50 have been released, may also be provided on the support columns 71.
  • These gripping means 74 may consist of two handles, or other gripping systems, provided on the sides of each of the support columns 71.
  • the printing unit 30 comprises a stiffening frame 80, preferably made of steel.
  • the stiffening frame 80 is preferably inserted inside the casing 70 of the printing unit 30.
  • This stiffening frame 80 may comprise two lateral supports 81, suitable for being fixed to the support columns 71, and a cross bar 82, suitable for being fixed to the cross member 72 of the printing unit 30.
  • the guides 34 of the printing head 32 and the driving means 36 may also be fixed to the stiffening frame 80.
  • the function performed by the stiffening frame 80 is to brace the entire structure of the printing unit 30, preventing the precision of the printing process from being adversely affected by any flexing of the guides 34 or misalignment between cross member and lateral supports of the printing unit.
  • this frame 80 allows removal and, if necessary, replacement of the printing unit to be performed safely, ensuring correct alignment of the support columns 71 and the cross member 72 of the printing unit 30.
  • each lateral support 81 intended to be arranged facing the base 20 may be provided with a support foot 84, also made of metallic material and intended to be connected to the mounting plate 60 of the base 20.
  • connection means 50 may be arranged on these support feet 84.
  • the base 20 may comprise two symmetrical support elements 90, where the printing unit 30 may be connected to the base 20.
  • the support elements 90 are located on the sides of the base 20 and are aligned along a transverse axis W which is arranged orthogonal to the sliding axis X.
  • the mounting plate 60 is preferably arranged on the upper end of each of the two support elements 90.
  • the base 20 may comprise second motor means 26 for moving the support elements 90 along the transverse axis W, so as to allow the distance W1, W2 between said support elements 90 to be varied.
  • the distance between the support elements 90 is understood as meaning the length, perpendicular to the sliding axis X, which joins together the outermost surfaces of each support element 90.
  • the second motor means 26 are controlled by the control unit 40 of the printer 10.
  • the movement of the two support elements may be performed advantageously independently of each other.
  • the machine may be provided with a laser projector system for projecting points or lines orthogonal to each other, inserted on the sliding guides of the axis X and the transverse axis W.
  • This system advantageously helps an operator, where necessary, to check that the support elements 90 remain fixed orthogonally relative to this axis X, when they are moved or positioned on the sides of the base 20.
  • These second motor means may consist of a linear actuator 28 operated by an electric motor 26.
  • the actuator 28 may be of the worm screw/nut type or may be an actuator of the hydraulic/pneumatic type.
  • the rods of the actuators 28 may be protected by protective panels 128 integral with the support elements 90 and designed to be extracted from or retracted inside the base 20.
  • Detection means of the encoder type, may be connected to the linear actuator, so as to transmit to the control unit 40 the exact position of the two support elements 90.
  • connection means 50 between base 20 and printing unit 30, together with the provision of support elements 90 movable along the axis W allows two or more different printing units 30 to be used with a single base 20, provided that that they are equipped with connection means compatible with the fixing seats 62, 64 formed in the base 20.
  • the faulty printing unit 30 may be replaced rapidly with an identical perfectly functioning unit.
  • the same base 20 may be advantageously used in combination with a printing unit 30 having a distance between the support columns 71 equal to Y3 (see Figure 19 ) and with a printing unit 130 having a distance between the support columns 71 equal to Y4 (see Figure 20 ).
  • Replacement of the printing units 30 and 130 may be performed very rapidly, after varying the distance W3, W4 between the support elements 90 of the base 20.
  • the support device 24 may be equipped with support surfaces which are removable or replaceable depending on the printing requirements and also have dimensions greater than that of the support device 24, provided that they remain within the centre-to-centre distance of the two support columns 71 of the printing unit.
  • removable surfaces may also have an asymmetrical form.
  • each support element 90 may comprise a movable appendage 91.
  • Said movable appendage 91 is preferably arranged on the upper surface of the support element 90 and is designed to slide along vertical guides 93 formed in the support element 90.
  • the mounting plate 60 of the base 20 may be fixed to the movable appendage 91 so that the printing unit 30 is in turn joined together with the movable appendage 91, once the connection between base and printing unit has been performed.
  • the base 20 may comprise third motor means 92 suitable for moving the movable appendages 91 along an elevation axis Z perpendicular to the sliding axis X and to the printing axis Y.
  • the third motor means 92 may be advantageously provided on each support element 90.
  • the motor means 92 may consist of a linear actuator 94 operated by an electric motor.
  • the linear actuator 94 may be of the worm screw/nut type or may be an actuator of the hydraulic/pneumatic type (see for example Figures 11 and 12 ).
  • the support elements 90 may be provided with detection means able to indicate to the control unit 40 the exact height of the movable appendages 91, so as to control the movement thereof.
  • the printing unit 30 may be raised from the base 20, moving the printing head 32 away from or towards the support device 24.
  • an appendage 91 movable along the elevation axis Z may be combined with the provision of support elements 90 movable along the transverse axis W.
  • a same printer 10 may be used to perform printing on substrates which have dimensions and forms which are very different from each other, without adversely affecting the printing precision.
  • the inkjet printer 10 may be used as a stand-alone machine controlled by an operator responsible for programming the control unit 40 and loading the various substrates to be printed.
  • the inkjet printer 10 may be configured as an automatic printing station along a production line.
  • a production line will be preferably complete with an automatic system for loading the substrate and an automatic system for unloading the printed substrate.
  • the machine downtime due to malfunctioning of the printing unit may be reduced.
  • the printing unit 30 may be replaced with a new unit provided that it is equipped with connection means 50 compatible with the base 20.
  • an inkjet printer according to the invention is versatile and able to be used with different substrates.
  • the possibility of moving the support elements 90 along an axis W transverse to the sliding axis X and the possibility of varying the height of the support elements 90 along an elevation axis Z allows the same base to be used, if necessary combining it with different printing units 30, in order to perform printing on substrates varying in shape and size from each other.
  • connection elements such as those described facilitates greatly the replacement of the printing unit, avoiding the need to use specialized labour.

Landscapes

  • Ink Jet (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
EP17164115.2A 2016-04-01 2017-03-31 Flüssigkeitskartusche Active EP3225412B8 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTV20163910 2016-04-01

Publications (3)

Publication Number Publication Date
EP3225412A1 true EP3225412A1 (de) 2017-10-04
EP3225412B1 EP3225412B1 (de) 2020-09-23
EP3225412B8 EP3225412B8 (de) 2020-12-16

Family

ID=58544709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17164115.2A Active EP3225412B8 (de) 2016-04-01 2017-03-31 Flüssigkeitskartusche

Country Status (1)

Country Link
EP (1) EP3225412B8 (de)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1078759A2 (de) * 1999-08-24 2001-02-28 Canon Kabushiki Kaisha Flüssigkeitsausstossdruckkopf, damit versehene Druckvorrichtung, Verfahren zur Herstellung eines Flüssigkeitsausstossdruckkopfes
US6752486B2 (en) * 2001-09-28 2004-06-22 Brother Kogyo Kabushiki Kaisha Liquid droplet patterning apparatus
ES2222328T3 (es) * 2001-03-21 2005-02-01 Ce.S.I. Centro Studi Industriali Di Taddei Ing. Franco E C. S.A.S. Maquina herramienta de alta velocidad con bastidor desplazable.
US7942496B2 (en) * 2005-12-05 2011-05-17 Silverbrook Research Pty Ltd Cradle unit for a printer assembly
US8425008B2 (en) * 2008-08-25 2013-04-23 Canon Kabushiki Kaisha Liquid discharge head and recording apparatus using the same
US8564633B2 (en) * 2010-02-10 2013-10-22 Citizen Holdings Co., Ltd. Thermal printer
US8610752B2 (en) * 2011-02-18 2013-12-17 Citizen Holdings Co., Ltd. Thermal printer
EP2703177A2 (de) * 2012-08-28 2014-03-05 Fujitsu Component Limited Drucker
RU2567318C1 (ru) * 2014-05-06 2015-11-10 Общество с ограниченной ответственностью "Научно-Производственное Предприятие Интеллектуальные Информационные Системы" Устройство перемещения рабочего стола зd-принтера

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1078759A2 (de) * 1999-08-24 2001-02-28 Canon Kabushiki Kaisha Flüssigkeitsausstossdruckkopf, damit versehene Druckvorrichtung, Verfahren zur Herstellung eines Flüssigkeitsausstossdruckkopfes
ES2222328T3 (es) * 2001-03-21 2005-02-01 Ce.S.I. Centro Studi Industriali Di Taddei Ing. Franco E C. S.A.S. Maquina herramienta de alta velocidad con bastidor desplazable.
US6752486B2 (en) * 2001-09-28 2004-06-22 Brother Kogyo Kabushiki Kaisha Liquid droplet patterning apparatus
US7942496B2 (en) * 2005-12-05 2011-05-17 Silverbrook Research Pty Ltd Cradle unit for a printer assembly
US8425008B2 (en) * 2008-08-25 2013-04-23 Canon Kabushiki Kaisha Liquid discharge head and recording apparatus using the same
US8564633B2 (en) * 2010-02-10 2013-10-22 Citizen Holdings Co., Ltd. Thermal printer
US8610752B2 (en) * 2011-02-18 2013-12-17 Citizen Holdings Co., Ltd. Thermal printer
EP2703177A2 (de) * 2012-08-28 2014-03-05 Fujitsu Component Limited Drucker
RU2567318C1 (ru) * 2014-05-06 2015-11-10 Общество с ограниченной ответственностью "Научно-Производственное Предприятие Интеллектуальные Информационные Системы" Устройство перемещения рабочего стола зd-принтера

Also Published As

Publication number Publication date
EP3225412B1 (de) 2020-09-23
EP3225412B8 (de) 2020-12-16

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