EP2090439A1 - Eigenständiges tintenstrahldruckmodul - Google Patents

Eigenständiges tintenstrahldruckmodul Download PDF

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Publication number
EP2090439A1
EP2090439A1 EP07858257A EP07858257A EP2090439A1 EP 2090439 A1 EP2090439 A1 EP 2090439A1 EP 07858257 A EP07858257 A EP 07858257A EP 07858257 A EP07858257 A EP 07858257A EP 2090439 A1 EP2090439 A1 EP 2090439A1
Authority
EP
European Patent Office
Prior art keywords
ink
reservoir
self
injector
electrovalve
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
EP07858257A
Other languages
English (en)
French (fr)
Other versions
EP2090439A4 (de
EP2090439B1 (de
Inventor
José Vicente Tomas Claramonte
Rafael Vicent Abella
Pedro GASSÓ ARCAS
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.)
Kerajet SA
Original Assignee
Kerajet 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 Kerajet SA filed Critical Kerajet SA
Publication of EP2090439A1 publication Critical patent/EP2090439A1/de
Publication of EP2090439A4 publication Critical patent/EP2090439A4/de
Application granted granted Critical
Publication of EP2090439B1 publication Critical patent/EP2090439B1/de
Not-in-force 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
    • 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
    • B41J2/135—Nozzles
    • B41J2/145—Arrangement thereof
    • 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
    • B41J2/135—Nozzles
    • B41J2/145—Arrangement thereof
    • B41J2/155—Arrangement thereof for line printing
    • 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
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16585—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles for paper-width or non-reciprocating print heads
    • 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
    • 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
    • B41J2/17596—Ink pumps, ink valves
    • 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
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/08—Embodiments of or processes related to ink-jet heads dealing with thermal variations, e.g. cooling
    • 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
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/19—Assembling head units
    • 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
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/20—Modules

Definitions

  • the present invention relates to a self-contained inkjet printing module which has been specially conceived for the construction of inkjet printers in which different print heads are assembled until the desired printing width and number of colours is obtained.
  • the number of injectors for each head is usually a power of two (one, two, four, eight, sixteen, thirty-two, sixty-four, one hundred and twenty-eight, etc.), being aligned and distributed uniformly in a plane commonly known as the "Injector plate”.
  • This arrangement has to be repeated for each of the different inks (colours) used, In such a way that the heads are arranged ordered in different rows.
  • Each of the said heads needs a system that will keep the plate, where the injector holes are housed, in an optimum state of cleanliness so that the quality of the printing is not affected.
  • Inkjet print heads normally function by keeping the ink at a pressure below ambient, with the ink being maintained in the Injectors by the action of the meniscus formed due to the surface tension of the ink.
  • the meniscus of one or more injectors breaks due to sudden mechanical and/or hydraulic oscillations. This causes the affected injector or injectors to suck in air and become dry.
  • the pressure of the ink is normally made to be greater than the outside, so that a small quantity of ink can flow which fills the entire path as far as reaching the injector hole. Increasing the pressure of the ink and/or reducing the external pressure by means of a vacuum carries out this increase in pressure.
  • the injector plate After carrying the re-priming as described, the injector plate is flooded and has to be cleaned as we have already mentioned in the previous point.
  • the ink flows through the injector holes in such a way that the ink in the injectors is always being renewed and maintains its properties even in the event of containing a highly volatile component, whose evaporation could produce an alteration in its properties.
  • the main problem that can appear is that the evaporation of a volatile component and the consequence increase in the concentration of the other components can cause the viscosity of the ink to increase so much that it blocks up the injectors.
  • the self-contained inkjet printing module which the invention proposes comprises the inkjet print heads arranged for printing the width that is required in a single passage.
  • This module comprises the maintenance system for the installed heads, as well as the pressurisation and thermal conditioning system for the ink used. Since this module includes all the elements related to the conditioning of the heads and the ink that they use, the construction of a machine is limited to the installation of as many self-contained modules as might be needed depending on the number of inks and the desired print resolution.
  • the self-contained module proposed by the invention offers a basic structure defined by an extruded or machined metal inverted T-section profile in which are incorporated mounted the print heads, with the injector plate being left exposed via the lower part.
  • This metal T-section profile includes three cylindrical perforations along its entire length, two of which are located in the lower part and are connected to each other to define a circuit which the liquid has to pass through at the temperature it is wished for the printing module to be functioning at, and the other perforation is arranged in the upper part, the three perforations being horizontal and the latter one defining a collector duct or distributor duct and thermal conditioner for the ink, from which there start a series of as many vertical holes as there are heads that are going to be installed, in such a way that manual valves and tubes can be arranged that supply the ink to the print heads at the desired temperature.
  • the head uses the ink, It becomes necessary to refill the working reservoir in order to keep the level within the limits set by the manufacturers of the heads.
  • the electrovalves for connecting the reservoir with the outside and for the entrance of Ink under pressure remain open, with the one for the entrance of air under pressure being closed, so that the ink thus flows inside the reservoir without affecting the pressure of the ink in the heads.
  • the electrovalves for connecting with the outside air and for the entrance of ink under pressure remain closed, and the one for the entrance of air under pressure is opened, so that this pressure can cause the ink to flow through the injector holes.
  • the electrovalve for the ink under pressure is opened and the ink flows inside the reservoir without affecting the pressure of the ink in the heads due to the fact that the reservoir is connected to the outside.
  • the electrovalve in bypass with the pump is closed and the peristaltic pump is started up so that the pressure of the air causes the ink to flow through the injector holes.
  • This system allows the refilling of the working reservoir to be able to be carried out at the same as the draining is being done.
  • the electrovalve for the ink under pressure is opened so that the ink flows inside the reservoir without affecting the pressure of the ink in the heads due to the fact that the reservoir is connected to the outside.
  • the centrifugal pump When it is required to increase the pressure for draining and priming, the centrifugal pump is started up so that the pressure of the air causes the ink to flow through the injector holes.
  • This system also allows the refilling of the working reservoir to be able to be carried out at the same as the draining is being done.
  • the self-contained inkjet printing module furthermore includes a mechanism that is capable of covering the injector plate and being able to collect the ink poured during each draining operation and leave the injector plate as clean as possible In order to be able to print with good quality.
  • This mechanism is also capable of preventing the ink from drying when the module is not functioning.
  • the invention provides two solutions for the piece that covers the Injector plate, with one solution or the other being used depending on the ink:
  • the injector plate is left entirely exposed and it is the concave cover which houses separate absorbent sponges at the ends of its cavity, which collect the surplus ink and clean a movable spatula at the end of each travel, as we will see later on in relation to the figures.
  • FIG 3 can be seen the basic structure of the printing module, referenced in general with the number 3 and materialized by the extruded or machined metal inverted T-section profile 4, provided with windows for fitting the print heads 5 with their injector plates 1.
  • Reference 6 designates two of the three horizontal longitudinal perforations, the lowest ones, which are connected together with the step 7 at one end, for the circulation of liquid at the desired temperature.
  • the ink is supplied to the heads 5 at the correct pressure, from the reservoir 12 in which the level is kept at a certain height 13 with respect to the injector plates 1, arriving at the distributor 8.
  • the reference 14 designates the entrance of air at a pressure controlled by the electrovalve 15 and the reference 16 is the entrance of Ink under pressure when the electrovalve 17 is open.
  • the electrovalves 15 and 17 are closed and the electrovalve 18 is open, which connects to the outside line 19.
  • the pressure with which the ink arrives at the heads via the distributor depends solely on the level In the reservoir 12.
  • the electrovalves 18 and 17 remain open during the refilling operation and 15 is closed so that the ink flows inside the reservoir without affecting the pressure of the ink in the heads.
  • the electrovalves 18 and 17 remain closed and 15 is open.
  • ink under pressure arrives at the reservoir 12 from the duct 16 via the electrovalve 17.
  • the electrovalve 20 is fitted in bypass with the peristaltic pump 21.
  • the electrovalve 17 remains closed, the electrovalve 2 is open and the peristaltic pump 21 is shut off.
  • the pressure of the ink in the heads depends solely on the level inside the working reservoir 12.
  • the electrovalve 17 is open so that the ink can flow inside the reservoir without affecting the pressure of the ink in the heads due to the connection duct 19 for the reservoir with the atmosphere.
  • the electrovalve 20 When the pressure is increased in order to carry out the draining and priming, the electrovalve 20 is closed and the peristaltic pump 21 is started up, with the ink flowing through the injector orifices.
  • the electrovalve 17 is opened so that the ink flows inside the reservoir 12 since it is connected to the outside via the duct 19.
  • the centrifugal pump 22 When it is required to increase the pressure in order to carry out draining and priming, the centrifugal pump 22 is started up. This system also allows refilling simultaneous with draining.
  • the reference 26 designates the concave cover with another absorbent sponge 27 which collects the surplus ink.
  • the cover 26 moves to position b) of figure 7 and after the draining the surplus ink is sucked up via the duct 28, and at the same time the air is sucked through the slits 29 dries the absorbent lamina 25.
  • the mound 30 formed when the sponge 27 presses on the groove 24 helps to eliminate drops from the injector plate 1.
  • the concave cover 26 has two absorbent sponges 31 housed in the ends of its cavity, which are for collecting the surplus ink, and also for cleaning the spatula referenced with 32 at the end of each travel. During the cleaning process, the cover goes to its position and following the draining the surplus ink is sucked through the duct 28. The spatula 32 then collects the drops remaining on the injector plate in a longitudinal movement, depositing them on the sponges 31 at the end.
  • the spatula 32 can oscillate freely on the cylinder 33 in which it is fitted, this cylinder being integral with the rod 34 in such a way that when the latter moves, the spatula can tilt (rotating on the cylinder 33) in order to be able to slide more smoothly on the injector plate.
  • each row is made of a single piece in the form of bars and are referenced with number 35. They include a longitudinal duct 36 which links the outlets for ink from each one.
  • Each of the bars 35 is joined to several cranks 37 perpendicular to separate vertical shafts 38 which have the possibility of rotating, rising and falling.
  • the different cranks 37 cause the rotation of the shafts 38 to become converted into a parallel displacement of the bars 35.
  • This figure 10 shows the system in a rest/cleaning position in which all the actions aimed at priming the injectors and cleaning the injector pate will be carried out.
  • the vertical shafts 38 rotate in the supports 39 and slide downwards starting from the position shown in figure 10 , as shown In position a) of figure 11 .

Landscapes

  • Ink Jet (AREA)
EP07858257A 2006-11-28 2007-11-26 Eigenständiges tintenstrahldruckmodul Not-in-force EP2090439B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200603033A ES2302634B1 (es) 2006-11-28 2006-11-28 Modulo autonomo de impresion por chorro de tinta.
PCT/ES2007/000680 WO2008065222A1 (es) 2006-11-28 2007-11-26 Módulo autónomo de impresión por chorro de tinta

Publications (3)

Publication Number Publication Date
EP2090439A1 true EP2090439A1 (de) 2009-08-19
EP2090439A4 EP2090439A4 (de) 2011-06-29
EP2090439B1 EP2090439B1 (de) 2012-09-05

Family

ID=39467472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07858257A Not-in-force EP2090439B1 (de) 2006-11-28 2007-11-26 Eigenständiges tintenstrahldruckmodul

Country Status (3)

Country Link
EP (1) EP2090439B1 (de)
ES (2) ES2302634B1 (de)
WO (1) WO2008065222A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2561727A1 (es) * 2014-08-29 2016-02-29 Kerajet S.A. Dispositivo, método y máquina de deposición de fluidos sobre una superficie
ES2558023R1 (es) * 2014-07-29 2016-03-15 Kerajet S.A. Dispositivo, Método y Máquina de deposición de fluidos sobre una superficie.
EP2759408A4 (de) * 2011-09-21 2016-10-12 Konica Minolta Inc Tintenstrahlaufzeichnungsvorrichtung
EP3556563A1 (de) * 2012-09-12 2019-10-23 Linx Printing Technologies Ltd Tintenstrahldruckkopf und kappe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2472140B2 (es) 2014-02-07 2015-01-29 Kerajet S.A. Método de proyección de sólidos sobre una superficie

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0870622A1 (de) * 1997-04-07 1998-10-14 Xerox Corporation Tintenstrahldrucker mit einem verbesserten Kühlsystem
DE19743804A1 (de) * 1997-10-02 1999-04-08 Politrust Ag Druckvorrichtung
WO2001087620A1 (en) * 2000-05-17 2001-11-22 Barco Graphics N.V. Printhead cartridge
EP1518683A1 (de) * 2003-09-24 2005-03-30 Fuji Photo Film Co., Ltd. Tröpfchenausstosskopf und Tintenstrahlaufzeichnungsgerät

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4985710A (en) * 1989-11-29 1991-01-15 Xerox Corporation Buttable subunits for pagewidth "Roofshooter" printheads
US5057854A (en) * 1990-06-26 1991-10-15 Xerox Corporation Modular partial bars and full width array printheads fabricated from modular partial bars
US5160945A (en) * 1991-05-10 1992-11-03 Xerox Corporation Pagewidth thermal ink jet printhead
IT1272050B (it) * 1993-11-10 1997-06-11 Olivetti Canon Ind Spa Dispositivo stampante parallelo con struttura modulare e relativo procedimento di realizzazione.
US6135586A (en) * 1995-10-31 2000-10-24 Hewlett-Packard Company Large area inkjet printhead

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0870622A1 (de) * 1997-04-07 1998-10-14 Xerox Corporation Tintenstrahldrucker mit einem verbesserten Kühlsystem
DE19743804A1 (de) * 1997-10-02 1999-04-08 Politrust Ag Druckvorrichtung
WO2001087620A1 (en) * 2000-05-17 2001-11-22 Barco Graphics N.V. Printhead cartridge
EP1518683A1 (de) * 2003-09-24 2005-03-30 Fuji Photo Film Co., Ltd. Tröpfchenausstosskopf und Tintenstrahlaufzeichnungsgerät

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2008065222A1 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2759408A4 (de) * 2011-09-21 2016-10-12 Konica Minolta Inc Tintenstrahlaufzeichnungsvorrichtung
EP3556563A1 (de) * 2012-09-12 2019-10-23 Linx Printing Technologies Ltd Tintenstrahldruckkopf und kappe
ES2558023R1 (es) * 2014-07-29 2016-03-15 Kerajet S.A. Dispositivo, Método y Máquina de deposición de fluidos sobre una superficie.
ES2561727A1 (es) * 2014-08-29 2016-02-29 Kerajet S.A. Dispositivo, método y máquina de deposición de fluidos sobre una superficie
WO2016030566A1 (es) * 2014-08-29 2016-03-03 Kerajet, S.A. Dispositivo, método y maquina de deposición de fluidos sobre una superficie

Also Published As

Publication number Publication date
EP2090439A4 (de) 2011-06-29
ES2302634A1 (es) 2008-07-16
ES2392951T3 (es) 2012-12-17
EP2090439B1 (de) 2012-09-05
WO2008065222A1 (es) 2008-06-05
ES2302634B1 (es) 2009-05-21

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