EP1013422B1 - Générateur de gouttes pour imprimante à jet d'encre à longue rangée d'orifices - Google Patents

Générateur de gouttes pour imprimante à jet d'encre à longue rangée d'orifices Download PDF

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Publication number
EP1013422B1
EP1013422B1 EP19990309513 EP99309513A EP1013422B1 EP 1013422 B1 EP1013422 B1 EP 1013422B1 EP 19990309513 EP19990309513 EP 19990309513 EP 99309513 A EP99309513 A EP 99309513A EP 1013422 B1 EP1013422 B1 EP 1013422B1
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EP
European Patent Office
Prior art keywords
drop generator
transducers
end sections
rows
length
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19990309513
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German (de)
English (en)
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EP1013422A3 (fr
EP1013422A2 (fr
Inventor
James A. Katerberg
Michael F. Baumer
Randy L. Fagerquist
Hilarion Braun
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to EP05016732A priority Critical patent/EP1602484B1/fr
Publication of EP1013422A2 publication Critical patent/EP1013422A2/fr
Publication of EP1013422A3 publication Critical patent/EP1013422A3/fr
Application granted granted Critical
Publication of EP1013422B1 publication Critical patent/EP1013422B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
    • B41J2/025—Ink jet characterised by the jet generation process generating a continuous ink jet by vibration
    • 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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
    • B41J2/03—Ink jet characterised by the jet generation process generating a continuous ink jet by pressure
    • 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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand

Definitions

  • the present invention relates to continuous ink jet printers and more particularly to the drop generator used in continuous ink jet printers.
  • ink is supplied under pressure to a manifold that distributes the ink to a plurality of orifices, typically arranged in linear array (s).
  • the ink is expelled from the orifices in jets which break up due to surface tension in the ink into droplet streams.
  • Ink jet printing is accomplished with these droplet streams by selectively charging and deflecting some droplets from their normal trajectories. The deflected or undeflected droplets are caught and re-circulated and the others are allowed to impinge on a printing surface.
  • U.S. Patent No. 4,999,647 describes a drop generator design for use in long array ink jet printers.
  • the drop generator consists of a rectangular block of metal that contains a fluid cavity and to which an orifice plate is bonded.
  • the block is designed to vibrate in the first longitudinal mode of the height direction.
  • poisson ratio induced couplings can produce non-uniform vibration at the orifice plate face of such a rectangular block.
  • vertical slots have been cut the block from front to back, slots perpendicular to the array direction. These slots effectively segment the drop generator reducing the effect of the poisson ratio coupling.
  • the slots are closed at the top and bottom faces of the drop generator to maintain the stiffness of the block to inhibit flexing motion down the length.
  • U.S. Patent No. 4,188,635 describes a different type of resonant block for use in stimulating ink jet arrays.
  • This resonant block has a small slot cut into the face to which the orifice plate is secured.
  • the slot serves as a fluid manifold.
  • the slot must be kept small to maintain the stiffness of the body.
  • a piezoelectric transducer is bonded to the drop generator on the face opposite the orifice plate face.
  • the piezoelectric must be thin compared with the thickness of the block.
  • This design has node lines on the orifice plate face which run parallel to the array of jets. This design is not applicable to long arrays of jets since the flow requirements of a long array necessitate a large fluid cavity to maintain non turbulent flow.
  • the introduction of a large fluid cavity into this design lowers the resonant frequency significantly, so that the design is no longer viable for use in a high speed ink jet printer.
  • U.S. Patent No. 4,827,285 describes another type of drop generator.
  • This patent describes a drop generator consisting of an orifice plate which is vibrated by means of two piezoelectric crystals that are bonded directly to the orifice plate. A fluid manifold is bonded directly to the orifice plate. Driving the piezoelectric crystals causes the outer edges of the orifice plate to be displaced, inducing the orifice plate to flex. The plate flexure causes the orifices to vibrate, stimulating the jets.
  • This drop generator concept is only useful where the array length is small, as longer arrays require larger fluid cavities to handle the fluid flow. The mass of the larger fluid cavities has a negative effect on the operating frequency range.
  • This design is also intrinsically fragile with the orifice plate being mounted by means of the brittle piezoelectric elements. Additionally as the piezoelectric elements are electrically driving to produce the vibration in the direction normal to the plane of the orifice plate, they are also made to expand in the direction parallel to the plane of the orifice plate. This expansion of the crystals can couple into other vibrational modes of the drop generator resulting in non-uniform stimulation down the orifice array.
  • U.S. Patent No. 4,245,225 describes a drop generator which places a cylindrical piezoelectric concentrically inside an larger cylinder.
  • the space between the cylinders serves as a plenum for the ink.
  • Ink is allowed to flow through holes in the wall of the outer cylinder to the orifices from which the jets of ink are formed.
  • the inner and outer surface of the piezoelectric cylinder are metallized to form electrodes.
  • the piezoelectric cylinder can be electrically driven by means of these electrodes to expand and contract radially. This radial mode vibration then drives a liquid cavity resonance in the space between the inner and outer cylinders.
  • the pressure oscillations produced by this cavity resonance in turn cause the stimulation of the jets of ink.
  • the radial expansion of the piezoelectric also produces a length change in the piezoelectric due to the Poisson's ratio.
  • standing waves can be produced down the length of the cylinder. These standing wave down the length couple back into the radial vibration so that the radial vibration is no longer uniform down the length of the cylinder or the ink jet array.
  • the means to locate the inner piezoelectric cylinder also can couple the vibration of the inner cylinder to the outer cylinder. The resulting vibrations of the outer cylinder will tend to interfere with the desired uniform stimulation amplitude down the ink jet array.
  • a drop generator for use in an ink jet printer, where the drop generator is capable of stimulating long ink jet arrays at high operating frequencies.
  • the drop generator comprises a substantially uniform cross section for a central portion and two end sections with different cross sections.
  • the drop generator utilizes multi-lobed radial bending modes for vibration of an array of orifices, and the vibrational modes are driven by at least two rows of transducers which extend substantially the length of the drop generator.
  • the transducers are placed consistent with a lobe structure of an operational radial bending mode.
  • the invention can additionally comprise end sections having features to adjust a resonant frequency of the end sections to match that of the central portion.
  • the present invention discloses a drop generator for use in ink jet printing, which employs multiple lobed squashing resonances to stimulate an array of jets.
  • the geometry of the ends of the drop generator is configured to make the resonant frequencies of the end sections approximately equal to that of the central portion of the drop generator.
  • Piezoelectric drive elements are placed to effectively drive the desired resonant mode while suppressing undesirable resonant modes.
  • the tube 10 In addition to the circularly symmetric modes of the tube employed in U.S. Patents No. 4,245,225 and No. 4,245,227, the tube 10 also has various radial bending modes. The lowest order of such modes has two lobes 12 where the tube bulges out, and two areas 14 where it is squeezed in. Higher order modes have increasing numbers of lobes and higher resonant frequencies. For ease of explanation, the invention will be described in terms of the lowest order mode, recognizing that the same principles can be applied to the higher order radial bending modes.
  • the lowest order radial bending mode can be effectively driven by symmetrically placing two piezoelectric elements 18 on the walls of the tube 10.
  • the length of the piezoelectric elements around the circumference should be less than one quarter of the circumference of the tube to prevent the piezoelectrics from extending across the node lines of the radial bending mode.
  • the symmetrically placed piezoelectrics When driven in phase at the appropriate frequency, the symmetrically placed piezoelectrics will effectively drive this two lobe radial bending mode. They will also not be very effective at driving other order radial bending modes.
  • This lowest order radial bending mode has associated with it a whole family of resonant modes with different profiles down the length of the tube and different resonant frequencies.
  • the lowest order of this family of modes maintains the same phase for the bending pattern down the length of the tube.
  • the second such mode will have the two ends of the tube bending out of phase.
  • Higher order modes will have increasing numbers of phase shifts down the length.
  • the lowest order mode of one families of radial bending modes preferably the one with constant phase of the radial bending down the length of the tube. That is, it is desirable for ink jet stimulation to use radial bending modes which don't have an axial bending mode component.
  • the radial bending mode having consistent phase down the length can be driven while the vibration of the modes with axial bending mode components can be suppressed.
  • the use of symmetrically placed piezoelectric elements 18 on the sides of the cylinder 10 provides much higher drive efficiency for driving the desired resonant mode.
  • the use of a single piezoelectric is less selective, that is, it is not as effective at suppressing the higher order radial bending modes as the symmetric pair of piezoelectrics. Therefore, a cylinder with a single row of piezoelectric drive elements will suffer from more interference from unwanted radial bending modes than does one with symmetrically placed piezoelectrics.
  • the need to terminate the ends of the tube-like drop generator to contain the ink, supply fluid ports, and provide means to locate the drop generator can affect the stimulation uniformity of the drop generator.
  • the present invention overcomes this problem by designing the end of the drop generator with a cut 25 to resonate at a similar frequency to the tube-like center of the drop generator.
  • Such shapes for example, might have a square or rectangular cross section, or even have more than four sides.
  • Such cross sectional shapes should have a height to width ratio close to one that is between 0.5 and 2.
  • the cross sectional shape should be consistent with the symmetry of the desired operational radial bending mode shape.
  • 3 sided or 6 sided cross sections might by utilized for drop generator with the 3 lobed radial bending mode as the desired operational mode.
  • Matching the cross sectional shape to the desired lobe shape facilitates the placement of the piezoelectric drive elements so that the desired mode can be driven.
  • three or more rows of piezoelectrics should be used as dictated by the desired lobe shape.
  • a preferred embodiment of the present invention comprising a long rectangular block 27.
  • the drop generator 27 is a rectangular block made of stainless steel with approximate measurements of a length of 25.4cm (10 inches), a width of 1.68cm (0.66 inches), and a height of 1.32cm (0.52 inches).
  • a fluid cavity 28 comprises a through hole 20 machined through the length of the block.
  • a long, narrow slot 22 is machined into the bottom face of the block, connecting to the through bore.
  • the orifice array located at the bottom of the drop generator, in the area of 24 in Fig. 3, is secured to the block and is centered over the slot 22.
  • rows of piezoelectric elements 18 are secured to the front and back faces of the block. When electrically driven, these piezoelectric elements expand and contract in the z direction. This causes the side walls of the drop generator to flex.
  • the driven mode corresponds to the two lobe squash mode described for the cylinder. As the piezoelectric elements are attached down the entire length of the drop generator, and the electrical signal is applied uniformly to all the elements, the flexing force is applied uniformly down the length of the drop generator.
  • the drop generator is mounted by means of thin wall stainless steel tubes (not shown) which are bonded into dovetailed grooves 23, as shown in Figs. 2, 3 and 4.
  • Thin wall tubing has been found to supply sufficient rigidity for locating stability of the drop generator, while providing minimal vibrational coupling of the drop generator to the support frame.
  • the dovetail grooves 23 have been found to minimize the risk of the mounting tubes breaking loose, while still facilitating easy removal of the tubing at refurbishment.
  • the fluid manifold comprises a through bore 20 which runs the length of the block and a long narrow fluid channel 32 connecting the through bore to the orifice plate face of the drop generator.
  • the narrow fluid channel stops approximately 1.3cm (1/2") from each end.
  • the end wall 22 of the fluid channel 32 is tapered to improve the fluid flow at each end of the drop generator.
  • Ink is supplied by fluid fittings (not shown). The fluid fittings are bonded into counter bores 30 as shown in Figs. 3 and 4.
  • An alignment feature 34 for locating the orifice plate over the fluid cavity is also illustrated. Such alignment features were described in U.S. Patent No. 4,999,647.
  • the ends of the drop generator it is desirable to design the ends of the drop generator to have a resonant frequency approximately equal to that of the center of the drop generator.
  • the vibration response of such a section depends on the relationship between the resonant frequency of the cross sectional slice and the frequency of the driving force.
  • the vibration amplitude of such a slice will reach its peak value when the driving frequency equals the resonant frequency.
  • the phase of the vibration relative to the driving force also shifts as the driving frequency is varied across the resonance.
  • the vibrational amplitude and phase of any other cross sectional slice of the drop generator will depend on the relationship between the driving frequency and the resonant frequency for that slice.
  • the uniform cross section produces the desired consistent resonant frequency.
  • the fluid cavity slot must terminate, to keep ink from spraying out the ends of the drop generator.
  • the cross section of the drop generator at each end of the body does not match the cross section in the middle of the body.
  • the resonant frequency of the end section of the drop generator therefore, does not match the resonant frequency of the central sections of the body.
  • the filling in of the slot tends to stiffen the cross section, raising the resonant frequency. Consequently, the vibrational amplitude and phase of the vibration at the end sections will not match the central sections.
  • One preferred embodiment utilizes cuts 25 on the top surface of the drop generator. These cuts, which run parallel to the fluid cavity slot, start about even with the end of the fluid cavity slot and extend to the ends of the drop generator as shown in Fig. 4. The cut 25 gradually increases in depth, reaching full depth approximately where the taper of the fluid cavity slot ends. For the embodiment described herein, therefore, the depth of the cut is 1.32mm (0.052") and the width is 1.57mm (0.062").
  • the design concept of the present invention of tuning the resonant frequency of the drop generator end sections to match that of the center, is applicable to other drop generator designs which do not employ radial bending modes.
  • One such design 50 for example, is shown in Fig. 5.
  • the design of Fig. 5 has a height of 4.8cm (1.9”), a width of 3.35cm (1.32”), and a thickness of 1.24cm (0.49").
  • the resonant mode shape is primarily that of a rectangle in the longitudinal mode, with end sections 52.
  • the apparent velocity of sound is lower near the walls of an object than in central portion of the object.
  • lateral motion due to Poisson's ratio in response to a compression or dilation in one direction is inhibited by the mass of the surrounding areas.
  • Near the surface the lack of mass in part of the surrounding region allows lateral motion due to Poisson's ratio to occur in response to a compression or dilation in a direction parallel to the surface.
  • the difference in the ability to move laterally in these two cases produces the apparent difference in the velocity of sound for the two regions.
  • the ends of the drop generator By virtue of the ends of the drop generator having a different apparent velocity of sound than the central portion, the ends of the block tend to have a slightly different resonant frequency than the central portion.
  • the stimulation of the ink jets can be made more uniform.
  • the preferred embodiment of the drop generator utilizes two rows of piezoelectric elements symmetrically placed extending down the length of the drop generator. These are driven to flex the sides of the drop generator to excite the radial bending mode. When driven, however, the piezoelectric elements expand also in the length direction, parallel to the axis of the fluid cavity. If the piezoelectrics are not appropriately sized and placed, they can excite undesirable axial bending modes down the length of the cavity. This problem can be avoided by identifying the wavelength for the axial bending modes which have resonant frequencies near the desired operating frequency. The length of the piezoelectric crystals should then be greater than 1 ⁇ 2 of the wavelength of such axial bending modes and less than one wavelength. This will ensure that the ends of the crystal, where most of the driving force is concentrated, will not be able to work in concert to excite such axial bending modes.
  • shear mode poled piezoelectric materials may be used to drive the drop generator. As the shearing action of such a piezoelectric element does not induce a length change in the piezoelectric, such piezoelectric transducers have less of a tendency to excite axial bending modes.
  • the present invention is useful in the field of ink jet printing, and has the advantage of providing an improved drop generator design, particularly for a long array ink jet printer.
  • An additional advantage of the present invention is to provide stimulation of long ink jet arrays at high operating frequencies.

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

Claims (10)

  1. Générateur de gouttes (27) destiné à une utilisation dans une imprimante à jet d'encre, le générateur de gouttes ayant des première et seconde sections d'extrémité présentant une certaine longueur et une section centrale associée entre les sections d'extrémité ainsi qu'une cavité de fluide (28) à laquelle une plaques d'orifices présentant une face de plaques d'orifices (24) est liée, la plaques d'orifices ayant un réseau de jets, caractérisé par :
    des modes de flexion radiale globalement à lobes multiples ayant une symétrie de lobes associée, avec au moins un mode de flexion radiale fonctionnel en vue d'une vibration d'un réseau d'orifices pour stimuler les jets,
    au moins deux rangées de transducteurs (18) destinées à commander les modes de vibration de générateur de gouttes, les au moins deux rangées de transducteurs s'étendant pratiquement le long d'une longueur de générateur de gouttes.
  2. Générateur de gouttes selon la revendication 1, dans lequel les au moins deux rangées de transducteurs sont placées de façon cohérente avec la symétrie de lobes du mode de flexion radiale fonctionnel.
  3. Générateur de gouttes selon la revendication 1, dans lequel les au moins deux rangées de transducteurs comprennent des transducteurs piézoélectriques.
  4. Générateur de gouttes selon la revendication 3, dans lequel les transducteurs piézoélectriques sont commandés dans un mode d'épaisseur des transducteurs piézoélectriques.
  5. Générateur de gouttes selon la revendication 3, dans lequel les transducteurs piézoélectriques sont commandés dans un mode de cisaillement de transducteurs piézoélectriques.
  6. Générateur de gouttes selon la revendication 1, dans lequel chaque transducteur individuel des au moins deux rangées de transducteurs présente une longueur supérieure à ½ d'une longueur d'onde de mode de flexion axiale avec des fréquences proches d'une fréquence de fonctionnement.
  7. Générateur de gouttes selon la revendication 1, comportant en outre :
    une section transversale pratiquement uniforme pour une partie centrale, et
    deux sections d'extrémité avec des sections transversales différentes, les sections d'extrémité ayant une fréquence de résonance correspondant à celle de la partie centrale.
  8. Générateur de gouttes selon la revendication 7, dans lequel les sections d'extrémité comportent des découpes (25) sur une partie supérieure du générateur de gouttes qui affectent la fréquence de résonance des sections d'extrémité.
  9. Générateur de gouttes selon la revendication 7, dans lequel les sections d'extrémité comportent un profil (52) qui affecte la fréquence de résonance des sections d'extrémité.
  10. Générateur de gouttes selon la revendication 7, dans lequel les modes de vibration sont commandés par au moins deux rangées de transducteurs qui s'étendent pratiquement le long de la longueur du générateur de gouttes.
EP19990309513 1998-12-14 1999-11-29 Générateur de gouttes pour imprimante à jet d'encre à longue rangée d'orifices Expired - Lifetime EP1013422B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05016732A EP1602484B1 (fr) 1998-12-14 1999-11-29 Générateur de gouttes pour imprimante à jet d'encre à longue rangée d'orifices

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US21105998A 1998-12-14 1998-12-14
US211059 1998-12-14

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP05016732A Division EP1602484B1 (fr) 1998-12-14 1999-11-29 Générateur de gouttes pour imprimante à jet d'encre à longue rangée d'orifices

Publications (3)

Publication Number Publication Date
EP1013422A2 EP1013422A2 (fr) 2000-06-28
EP1013422A3 EP1013422A3 (fr) 2001-04-04
EP1013422B1 true EP1013422B1 (fr) 2006-08-23

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Application Number Title Priority Date Filing Date
EP19990309513 Expired - Lifetime EP1013422B1 (fr) 1998-12-14 1999-11-29 Générateur de gouttes pour imprimante à jet d'encre à longue rangée d'orifices
EP05016732A Expired - Lifetime EP1602484B1 (fr) 1998-12-14 1999-11-29 Générateur de gouttes pour imprimante à jet d'encre à longue rangée d'orifices

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EP05016732A Expired - Lifetime EP1602484B1 (fr) 1998-12-14 1999-11-29 Générateur de gouttes pour imprimante à jet d'encre à longue rangée d'orifices

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EP (2) EP1013422B1 (fr)
JP (2) JP4417499B2 (fr)
CA (1) CA2292239A1 (fr)
DE (1) DE69932914T2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7584539B2 (en) 2006-10-16 2009-09-08 Eastman Kodak Company Electropolishing of inkjet printer components
EP2468312A4 (fr) 2009-08-19 2014-05-14 Univ Tohoku Feuille pour kératoplasties
WO2011115303A1 (fr) 2010-03-18 2011-09-22 Ricoh Company, Ltd. Méthode d'éjection de gouttelettes de liquide, appareil d'éjection de gouttelettes de liquide, appareil d'impression à jet d'encre, méthode de production de particules fines, appareil de production de particules fines et toner

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4188635A (en) 1977-10-03 1980-02-12 International Business Machines Corporation Ink jet printing head
US4245227A (en) 1978-11-08 1981-01-13 International Business Machines Corporation Ink jet head having an outer wall of ink cavity of piezoelectric material
US4245225A (en) 1978-11-08 1981-01-13 International Business Machines Corporation Ink jet head
JPS56144641A (en) * 1980-04-11 1981-11-11 Arupain Kk Muting device of car-mounted radio
US4587528A (en) * 1983-05-19 1986-05-06 The Mead Corporation Fluid jet print head having resonant cavity
JPS61258762A (ja) * 1985-05-13 1986-11-17 Ricoh Co Ltd マルチノズル型インクジエツトヘツド
JPS62140851A (ja) * 1985-12-17 1987-06-24 Canon Inc インクジエツト記録ヘツド
JPS63113651A (ja) * 1986-10-30 1988-05-18 Nec Home Electronics Ltd ホ−ムバス・システムのサブコントロ−ラ
US4827285A (en) 1988-09-01 1989-05-02 Eastman Kodak Company Continuous ink jet printer having orifice plate flexure stimulation
US4999647A (en) 1989-12-28 1991-03-12 Eastman Kodak Company Synchronous stimulation for long array continuous ink jet printer

Also Published As

Publication number Publication date
JP4417499B2 (ja) 2010-02-17
EP1602484A2 (fr) 2005-12-07
JP2009190415A (ja) 2009-08-27
DE69932914T2 (de) 2007-04-05
JP4886817B2 (ja) 2012-02-29
EP1602484B1 (fr) 2011-09-21
EP1013422A3 (fr) 2001-04-04
EP1602484A3 (fr) 2009-01-07
EP1013422A2 (fr) 2000-06-28
DE69932914D1 (de) 2006-10-05
CA2292239A1 (fr) 2000-06-14
JP2000218785A (ja) 2000-08-08

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