WO2012038520A1 - Dispositif d'impression à jet d'encre continu binaire, avec consommation réduite de composés volatils tels que des solvants - Google Patents

Dispositif d'impression à jet d'encre continu binaire, avec consommation réduite de composés volatils tels que des solvants Download PDF

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Publication number
WO2012038520A1
WO2012038520A1 PCT/EP2011/066552 EP2011066552W WO2012038520A1 WO 2012038520 A1 WO2012038520 A1 WO 2012038520A1 EP 2011066552 W EP2011066552 W EP 2011066552W WO 2012038520 A1 WO2012038520 A1 WO 2012038520A1
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WO
WIPO (PCT)
Prior art keywords
jets
curtain
gutter
ink
air
Prior art date
Application number
PCT/EP2011/066552
Other languages
English (en)
Inventor
Bruno Barbet
Original Assignee
Markem-Imaje
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 Markem-Imaje filed Critical Markem-Imaje
Publication of WO2012038520A1 publication Critical patent/WO2012038520A1/fr

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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
    • B41J2/07—Ink jet characterised by jet control
    • B41J2/105—Ink jet characterised by jet control for binary-valued deflection
    • 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
    • B41J2/18—Ink recirculation systems
    • B41J2/185—Ink-collectors; Ink-catchers

Definitions

  • the invention relates to a binary continuous ink-jet printing device.
  • printers which include this type of printing device and which are used in the field of industrial printing.
  • the fundamental principle behind an ink-jet printer is that it forces liquid to pass through calibrated orifices.
  • the liquid is usually ink made up of several components (resins, colouring agents, salts etc.) and mainly of one or more solvents which are by their nature volatile.
  • ink is stored in a liquid circuit called the ink circuit and is in contact with the surrounding air only at the ejection nozzles.
  • the liquid is ejected directly through the nozzles in the form of drops. This means that the exchange surface area between the drops of liquid and the surrounding air is usually very small. As a result the problems associated with the loss of volatile compounds, with denaturing of the ink and with pollution/contamination of the environment are minimal.
  • - continuous jet technology involves maintaining ink under pressure so that the liquid (essentially ink) forms one or more continuous jets downstream of the nozzle plate (a plate in which the calibrated orifice (s) is/are formed) .
  • the continuous jet(s) is/are then continuously or intermittently broken up into drops
  • the drops intended for printing are directed towards the media to be printed and the remainder of the liquid is collected by a return gutter which is usually at a sub- atmospheric pressure in order to draw the collected liquid through an umbilical towards the printer's ink circuit (for recycling, re-processing etc.) .
  • the continuous jet technology has to deal with the problem of managing the products of the evaporation of the liquid not only in order to guarantee the composition and the proportions of the constituents in the ink, but also to minimise the production of volatile species in the environment, as well as the means of reprocessing the returned ink.
  • This problem is in fact present in deviated continuous jet technology (usually based on a few jets) but it becomes of prime importance in binary continuous jet technology (multiple jets, usually several tens of jets) .
  • inks which, although they vary greatly in their composition, usually have a volatile solvent base (and other volatile compounds) .
  • the ejected ink is continually replaced and driven at a speed of several metres to several tens of metres per second, which produces a strong ventilation effect on the free surface of the jet(s);
  • the diphasic mixture (ink-air) is collected and drawn into the gutter and undergoes stirring in the umbilical which promotes evaporation until the air (drawn in) is saturated with volatile species coming from the liquid ink.
  • the printer ink circuit is designed so that liquid is separated from the gas (air laden by vapour) coming from the umbilical.
  • the gas laden by volatile compounds is sent back to the printing head, that is, just upstream of the ink recovery gutter (as proposed in patent EP 0 123 523 by the WILLETT INTERNATIONAL company) or into the printing head (as proposed in patent EP 0 560 332 from the HITACHI LTD company) .
  • the technical solution common to these patents therefore involves recycling the gas to form an almost closed circuit made up of the head, the umbilical and the ink circuit.
  • the printing head in order to allow the passage of drops which are intended for printing onto the media to take place, the printing head must be equipped with an opening towards the external surroundings, aligned with the continuous jet or jets; this is one of the paths favoured for the evacuation of air entrained by the continuous jet or jets;
  • a print head includes necessarily electrodes (charge electrodes and deflection electrodes downstream said charge electrodes) into its cavity through which the ejected ink jet goes. These electrodes imply a certain encumbrance. In fact, the presence of these electrodes causes turbulences of air containing solvent (s) or other volatile species around the ink jet. In other words, the solvent (s) or other volatile species can be agitated only in a random way, which renders impossible their recovery.
  • the general purpose of the invention is thus to propose a solution for recovering the volatile compounds, such as solvents initially present in ink, during ejection of the jets (curtain) of the latter and in the interior of a print head of a binary continuous jet printer.
  • a specific purpose is to propose such a solution that is simple and effective.
  • the invention relates to a recovery method of volatile compounds initially present in an ejected ink under the form of a curtain in a print head of a binary continuous ink-jet printer, comprising:
  • an ink drop generator whose lower edge includes a nozzle plate including multiple nozzles adapted to the ejection of a curtain of jets simultaneously both along the first direction Z and along a second direction X perpendicular to the first direction Z,
  • a sorting block arranged downstream of the nozzle plate and offset in relation to the nozzle(s), along a third direction Y perpendicular to the first direction Z, and to each jet, where the sorting block includes means for selective deviation of the drops issued of the break-up of the jets,
  • one gutter which includes a single recovery tray whose inlet includes a apex which is offset from the sorting block in a third direction Y, arranged downstream of the sorting block and at a set height L from the lower edge of the nozzle plate in the first direction Z and which extends along the second direction X in order to recover the ink issued from the jets curtain not to be used for printing.
  • the method comprises the following steps: a/ selecting an ink which volatiles compounds have a Schmidt number of the order of 1 or more;
  • steps c/ and d/ being such that when the distance along the third direction Y between the jets curtain and the sorting block is:
  • the first Z, second X and third Y directions define a three- dimensional system of three axes which are perpendicular in pairs .
  • the air entrained by the ink jets is the layer of air which may be laden by the volatile compounds and which surrounds it or them.
  • the purpose of the invention is therefore to reduce losses of solvent and other volatile species in a binary continuous jet printing head.
  • simple and effective means are implemented in order that volatile compounds produced by evaporation from a curtain of ink jets are collected and evacuated without escaping from the printing head.
  • the means of the invention thus implemented are used to collect both the ink which has to be recycled and the vapour from the ink jets without modifying the outlet opening or slot through which the ink drops intended to print emerge.
  • the inventor has thus identified a solution to the problem of high levels of solvent consumption by using means which are already implemented in a binary continuous ink jet printer: only the position of the inlet of the gutter or the dimensions of its inlet opening are altered and the level of the sub-atmospheric pressure is adjusted so that the air flow collected is in some way collected.
  • the inventor has first analyzed the physical mechanisms for volatile compounds, such as solvents, when evacuated by a jets curtain. He thus considered that two transport mechanisms act simultaneously and influence the travel of volatiles compounds:
  • This diffusive boundary layer is characterized by the molecular diffusion coefficient, also called mass diffusive coefficient,
  • hydrodynamics draw mechanism according to which the jets curtain draws the surrounding air in a hydrodynamics boundary layer.
  • This hydrodynamics boundary layer is characterized by the dynamic viscosity .
  • the ratio between the dynamic viscosity and the mass diffusive coefficient is defined by the dimensionless number called Schmidt number Sc.
  • the diffusive boundary layer increases very quickly in the radial direction of the jets curtain and pierces namely the hydrodynamics boundary layer. It does that mean that the Schmidt number Sc is inferior or very inferior to one.
  • the used ink transports volatile compounds (solvents) which diffusion is substantially according to the same asymptotic profile of boundary layer as the air hydrodynamics boundary layer drawn by the curtain of ink jets .
  • the solution according to the invention involves:
  • the inventor used the rules for carrying out fluid calculations on boundary layers of air which surround a liquid, and which are disturbed (Couette profile) by a physical component (sorting block) or not (Blasius profile) .
  • the layer of entrained air may have an identical profile or different profile on either side of one jet, depending on the printing head environment close to each jet; that is, depending on the obstacles or physical barriers encountered by the air along its journey from the nozzle to the inlet of the gutter.
  • the layer may also exhibit:
  • this may be the case where the distance between the curtain of jets and the sorting block is such that the air comes into contact with the block of electrodes;
  • the invention is particularly efficient with inks containing alcohol and/or ketone as solvents.
  • the alcohol has a Schmidt number Sc of the order of 1.4.
  • Ketone has a Schmidt number Sc in the order of 1.7.
  • step b/ is achieved such that the distance between the gutter apex and a jets curtain recovered by said gutter is along the third direction Y at least equal to 380pm, preferably at least 700pm.
  • the height L between the lower edge of the nozzle plate and the apex is comprised between 7 and 14 mm whilst the speed Vj of the jets curtain is comprised between 10 m/sec and 16 m/sec.
  • the invention concerns also a print head such as described above in which the recovery gutter is adapted to be displaced at least along the third direction Y.
  • FIG. 1 is a general schematic view of a printing head in accordance with the invention and which implements binary continuous jet technology
  • - Figure 2 is a side schematic view of a printing head in accordance with existing technology and which implements binary continuous jet printing technology
  • FIG. 3 is a side schematic view of a printing head in accordance with the invention and which implements binary continuous jet printing technology
  • FIG. 4A and 4B show a side schematic view of the adjustment steps to implement the invention in a binary continuous jet printing head.
  • a printing head which implements binary continuous jet printing technology and which is in accordance with the invention includes a generator known as a drop generator 1 equipped with a nozzle plate 2.
  • a generator known as a drop generator 1 equipped with a nozzle plate 2.
  • the ink 3 pressurised in the generator 1 flows, through means for stimulation, through the calibrated nozzles 4 to form a jets curtain.
  • a sorting block 5 Downstream of the nozzle plate 2, along the direction of flow of the ink (along the Z axis) there is a sorting block 5 which includes a functional part 6 with electrodes.
  • this part with electrodes 6 is to place the portions of jets formed by break-up into different trajectories, one volume of which is collected by the recovery gutter 7 (recycled and non-printed ink), whilst the other is directed towards the media to be printed 8 (figure 1) .
  • These printed drops are generally spherical and follow the fluid trajectory of each jet (direction given by the axis of a given nozzle) .
  • the reverse configuration could also be envisaged: the printed drop is deviated and the non-deflected drop is collected by the gutter.
  • upstream and «downstream» are relative to the direction of flow of the jets of liquid (ink with any volatile compounds) .
  • the three directions X, Y and Z defined according to the invention form a three dimensional axis system with the directions perpendicular to each other in pairs .
  • a jets curtain 10 operated at a speed Vj , typically of the order of 12 m/sec (generally between 10 and 20 m/sec in a binary continuous jet technology printer), entrains the surrounding air from the nozzle 4 plate 2 to the recovery gutter, otherwise called the recycling gutter 7.
  • Vj typically of the order of 12 m/sec
  • the jets create a draught that is fulfilled by the air 11 coming from an injection zone Z.I. which is preferentially located close to the nozzle plate.
  • the air driven at a speed which is close to that of the jets 10, remains confined very close to the jets curtain.
  • the entrainment effect spreads on either side of the jets curtain so that it is at maximum width at the gutter 7.
  • the air becomes laden by solvent vapour and vapour of the various volatile species, as shown schematically in 13, 14, coming from the liquid surface of the jets deflected (see parts 12) by the electrode part 6.
  • the physical phenomenon by which the air becomes laden by solvents or other volatile species is due to an evaporation phenomenon .
  • the inventor has judiciously- thought to position the gutter (whose prime function is to recover and remove the ink) and to adjust its depression level, so that it intercepts and removes all the air laden by solvents (or other volatile species) which is transported by the jets curtain 10.
  • the inventor considers that an ink containing alcohol and/or ketone is particularly appropriated.
  • Figure 3 shows the solution according to the invention with jets curtains 10, 12. This figure shows that the part of the jets 12 deflected by the sorting block 6 (electrodes for example for electrostatic action) , drops intended to print and produced by the break-up of the jet 10 upstream are not shown.
  • the level of depression in the gutter 7 is adjusted so that the volumetric flow of air drawn in by the latter is at least equal to the volumetric flow of the air transported by the jets curtain 12.
  • This flow is estimated approximately in the following manner (at the gutter 7, the flow regime is regarded as being established, that is, stationary and laminar) .
  • the flow of air 17 entrained by the jets curtain 10 upstream of the gutter 7 may be shown schematically as two distinct zones on either side of the jets curtain 10, respectively zone 1 and zone 2, that is, respectively, to the left and to the right of the curtain 10 in accordance with the convention in figure 3.
  • the spacing between jets 10 is less than the value of the thickness of the boundary layer 17 of entrained air so that the air located between two adjacent jets moves at the same speed as the jet irrespective of its distance along the Z direction.
  • the zone 1 is located between the jets curtain 10 and the sorting block 6 which forms a physical barrier to the flow of air 17.
  • the speed of the air at the surface of the jet varies more or less linearly from 0 in contact with the face 18 (face opposite the jets curtain) of the sorting block 6 to a speed Vj (typically of the order of 12 m/sec), with a co-called Couette profile 19 along direction Y.
  • ⁇ represents the average distance between the face 18 of the electrode block 6 and the jets curtain 10. This value is typically of the order of 300 pm.
  • Zone 2 is located outside the jets curtain 10 on the side not facing the latter.
  • the speed of the air changes from Vj to a zero speed as it moves away from the jets curtain 10 along the direction Y: the decrease in the speed of the entrained air schematically follows a so-called Blasius profile 22
  • the thickness 6 2 of the boundary layer 17 (air flow in which the air is moved at a significant speed) may be calculated as follows:
  • a represents a numerical coefficient of between 3 and 5, typically 3, that is, the thickness 6 2 represents between 90 and 99 % of the thickness of the boundary layer
  • v a is the kinematic viscosity of the air, typically equal to 2.1CT 5 m 2 .sec _1 ,
  • L is the distance separating the nozzle plate 2 from the gutter input, that is, precisely between the lower edge 20 of the nozzle plate 2 and a horizontal passing through the apex 15 of the gutter 7.
  • Qv 2 per unit width along direction X
  • the total volumetric air-flow rate Qv T of air entrained by the jets curtain 10 both in zone 1 and zone 2 and collected by the gutter 7 (per unit width of the printing head along direction Y) is therefore equal to :
  • the apex 15 of the gutter is then positioned so as to intercept and collect the entire flow of air entrained by the jets curtain 10.
  • the volumetric air flow Q drawn in by the gutter 7 (and therefore removed from the printing head) is compensated for by a natural or forced addition of air, introduced close to the nozzle plate.
  • An air injection zone Z.I. could therefore be sized close to the nozzle plate 2 in order to achieve the desired equivalent addition of flow.
  • Figures 4A and 4B show the adjustment steps for implementing the invention in a binary continuous ink jet printing head.
  • the drop generator 1 includes multiple nozzles 4 allowing a jets curtain to be formed by pressurization of the ink.
  • the jets curtains 10 ⁇ In the nominal position and in the absence of deflection (absence of a voltage in the electrodes part 6), the jets curtains 10 ⁇ is said to be in the hydraulic position as the ink jets are guided individually by each nozzle 4 (section view in figure 4A) .
  • the jets curtain 10 ⁇ is the nominal point at distance YO along direction Y.
  • so-called «factory settings» can be used to ensure that the thickness ⁇ 2 of the boundary layer of air 17 outside (in the positive direction Y) the deflected jets curtain 10 in printing operation is effectively collected by the gutter 7 made up of a single tray.
  • any spread of the orientation between one jet and another in the same curtain 10 indeed, although the mechanical alignment of the various nozzles 4 by drilling is practically defect free, it could be that the orientation of a jet ejected from a given nozzle is not strictly identical to that of another jet ejected from another nozzle.
  • an electrical potential is usually applied (voltage level) to the deflection electrodes 6 so as to deflect the jets with an amplitude of value Dl, typically 530 pm in the negative Y direction.
  • This amplitude of value Dl, typically 530 pm is the nominal value for the deflection checked on an optical bench (display assembly: monitor-zoom-camera-micrometer translation movement units) with a measurement precision better than 50 pm;
  • the position of the gutter 7 in the Y direction is adjusted using a device that is not shown whose function is to move the gutter forward (movement along Y - positive direction) or retract it (movement in the Y direction - negative direction) .
  • the stroke of the gutter 7 can be calibrated so that all the deflected ink-jets are intercepted by the gutter 7 and so that the apex 15 no longer intercepts any intended to print which may be dispersed from one jet to another of the same curtain.
  • the gutter apex 15 can be tangential to the jets curtain which undergoes no deflection (figure 4A) . Concretely, this tangential point may readily be seen by an operator since the touch contact between the jets curtain 10 and the apex 15 slightly soils the latter.
  • the movement stroke of the gutter 7 is adjusted so that the distance D2 between its inlet apex 15 and the dimension Y0, typically 150 pm, allows air of thickness 6 2 (which corresponds to the difference D1-D2 ⁇ 6 2 ) to be collected .
  • the invention provides a technical solution to a problem which has received little or no attention in the existing technology, whilst offering the following advantages:
  • ⁇ denaturing or changes to the physical properties of the ink associated with the loss of less volatile compounds the usual devices in an ink-jet printer which, in the event of modification of the printed ink, act on the ink quality/composition through a feedback system, are therefore less stressed; ⁇ reduced operating costs for ink-jet printers because of lower solvent consumption and a better maintained environment (for the operator, the object to be printed etc.) .

Landscapes

  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Abstract

L'invention porte sur une solution pour limiter la consommation de composés volatils, tels que des solvants, initialement présents dans une encre pendant l'éjection de cette dernière dans une imprimante à jet d'encre continu binaire. Selon l'invention : - il est sélectionné une encre dont des composants volatils ont un nombre de Schmidt Sc supérieur ou égal à un; - la gouttière (7) pour la récupération et la collecte d'encre non prévue pour l'impression et émise à partir d'un rideau de jets est judicieusement positionnée de façon à avaler l'écoulement d'air chargé d'une vapeur de composés volatils entraînés par le rideau de jets d'encre; - un niveau de dépression est établi dans la gouttière afin de retirer l'écoulement volumétrique de l'écoulement d'air avalé; - de l'air est injecté au voisinage de la plaque de buses de la tête d'impression afin de compenser un écoulement d'air volumétrique récupéré.
PCT/EP2011/066552 2010-09-24 2011-09-23 Dispositif d'impression à jet d'encre continu binaire, avec consommation réduite de composés volatils tels que des solvants WO2012038520A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR1057718A FR2965215A1 (fr) 2010-09-24 2010-09-24 Dispositif d'impression a jet d'encre continu binaire, a consommation reduite de composes volatils, tels que les solvants
FR1057718 2010-09-24
US39222710P 2010-10-12 2010-10-12
US61/392,227 2010-10-12

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WO2012038520A1 true WO2012038520A1 (fr) 2012-03-29

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013173200A1 (fr) * 2012-05-14 2013-11-21 Videojet Technologies Inc. Imprimante à jet d'encre
US9044954B1 (en) 2012-05-14 2015-06-02 Videojet Technologies Inc. Ink jet printer
US9227421B2 (en) 2012-05-14 2016-01-05 Videojet Technoogies Inc. Ink jet printer
US20170173961A1 (en) 2015-12-22 2017-06-22 Dover Europe Sàrl Inkjet printer with improved solvent recovery circuit
FR3045459A1 (fr) * 2015-12-22 2017-06-23 Dover Europe Sarl Tete d'impression ou imprimante a jet d'encre a consommation de solvant reduite
US10179456B2 (en) 2016-08-16 2019-01-15 Dover Europe Sàrl Method and device for filtering the recycled atmosphere of a print head
EP3674088A1 (fr) 2018-12-28 2020-07-01 Dover Europe Sàrl Tête d'impression à jet d'encre améliorée comprenant une protection contre l'eau
WO2022237983A1 (fr) * 2021-05-12 2022-11-17 Dover Europe Sàrl Imprimante à jet d'encre continu, composants fluides pour une imprimante à jet d'encre continu et procédé de fabrication desdits composants

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035811A (en) * 1976-07-12 1977-07-12 The Mead Corporation Ink jet recorder and catcher therefor
GB2098546A (en) * 1981-05-15 1982-11-24 Dick Co Ab Ink jet printing apparatus
EP0123523A2 (fr) 1983-04-20 1984-10-31 Willett International Limited Appareil et procédé pour déposer des gouttelettes
EP0560332A2 (fr) 1992-03-12 1993-09-15 Hitachi, Ltd. Imprimante à jet d'encre

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035811A (en) * 1976-07-12 1977-07-12 The Mead Corporation Ink jet recorder and catcher therefor
GB2098546A (en) * 1981-05-15 1982-11-24 Dick Co Ab Ink jet printing apparatus
EP0123523A2 (fr) 1983-04-20 1984-10-31 Willett International Limited Appareil et procédé pour déposer des gouttelettes
EP0560332A2 (fr) 1992-03-12 1993-09-15 Hitachi, Ltd. Imprimante à jet d'encre

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
G.K. BATCHELOR: "AN INTRODUCTION TO FLUID DYNAMICS", 1970, CAMBRIDGE PRESS, pages: 311

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013173200A1 (fr) * 2012-05-14 2013-11-21 Videojet Technologies Inc. Imprimante à jet d'encre
US9044954B1 (en) 2012-05-14 2015-06-02 Videojet Technologies Inc. Ink jet printer
US9227421B2 (en) 2012-05-14 2016-01-05 Videojet Technoogies Inc. Ink jet printer
FR3053923A1 (fr) * 2015-12-22 2018-01-19 Dover Europe Sarl Tete d'impression ou imprimante a jet d'encre a consommation de solvant reduite
EP3466692A1 (fr) 2015-12-22 2019-04-10 Dover Europe Sàrl Tête d'impression ou imprimante à jet d'encre ayant une consommation réduite de solvant
FR3045458A1 (fr) * 2015-12-22 2017-06-23 Dover Europe Sarl Imprimante a jet d'encre a circuit de recuperation de solvant ameliore
EP3225400A1 (fr) 2015-12-22 2017-10-04 Dover Europe Sàrl Tête d'impression ou imprimante à jet d'encre ayant une consommation réduite de solvant
EP3225405A1 (fr) 2015-12-22 2017-10-04 Dover Europe Sàrl Imprimante à jet d'encre avec circuit amélioré de récupération de solvant
US20170173961A1 (en) 2015-12-22 2017-06-22 Dover Europe Sàrl Inkjet printer with improved solvent recovery circuit
US11084288B2 (en) 2015-12-22 2021-08-10 Dover Europe Sàrl Print head or ink jet printer with reduced solvent consumption
FR3045459A1 (fr) * 2015-12-22 2017-06-23 Dover Europe Sarl Tete d'impression ou imprimante a jet d'encre a consommation de solvant reduite
US10336077B2 (en) 2015-12-22 2019-07-02 Dover Europe Sàrl Print head or ink jet printer with reduced solvent consumption
US10442204B2 (en) 2015-12-22 2019-10-15 Dover Europe Sàrl Inkjet printer with improved solvent recovery circuit
US10549538B2 (en) 2016-08-16 2020-02-04 Dover Europe Sàrl Method and device for filtering the recycled atmosphere of a print head
US10179456B2 (en) 2016-08-16 2019-01-15 Dover Europe Sàrl Method and device for filtering the recycled atmosphere of a print head
EP3674088A1 (fr) 2018-12-28 2020-07-01 Dover Europe Sàrl Tête d'impression à jet d'encre améliorée comprenant une protection contre l'eau
US11192378B2 (en) 2018-12-28 2021-12-07 Dover Europe Sàrl Ink jet print head with water protection
WO2022237983A1 (fr) * 2021-05-12 2022-11-17 Dover Europe Sàrl Imprimante à jet d'encre continu, composants fluides pour une imprimante à jet d'encre continu et procédé de fabrication desdits composants

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