EP0999933B1 - Buse de jet d'encre, actionne par un champ magnetique - Google Patents

Buse de jet d'encre, actionne par un champ magnetique Download PDF

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Publication number
EP0999933B1
EP0999933B1 EP98933350A EP98933350A EP0999933B1 EP 0999933 B1 EP0999933 B1 EP 0999933B1 EP 98933350 A EP98933350 A EP 98933350A EP 98933350 A EP98933350 A EP 98933350A EP 0999933 B1 EP0999933 B1 EP 0999933B1
Authority
EP
European Patent Office
Prior art keywords
ink
ink jet
plunger
nozzle
jul
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
EP98933350A
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German (de)
English (en)
Other versions
EP0999933A4 (fr
EP0999933A1 (fr
Inventor
Kia Silverbrook
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.)
Silverbrook Research Pty Ltd
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Silverbrook Research Pty Ltd
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Publication date
Priority claimed from AUPO8070A external-priority patent/AUPO807097A0/en
Priority claimed from AUPO7933A external-priority patent/AUPO793397A0/en
Priority claimed from AUPO8066A external-priority patent/AUPO806697A0/en
Priority claimed from AUPO8077A external-priority patent/AUPO807797A0/en
Priority claimed from AUPO8063A external-priority patent/AUPO806397A0/en
Priority claimed from AUPO7935A external-priority patent/AUPO793597A0/en
Priority claimed from AUPO8075A external-priority patent/AUPO807597A0/en
Priority claimed from AUPO8060A external-priority patent/AUPO806097A0/en
Priority claimed from AUPO8076A external-priority patent/AUPO807697A0/en
Priority claimed from AUPO8048A external-priority patent/AUPO804897A0/en
Priority claimed from AUPO7936A external-priority patent/AUPO793697A0/en
Priority claimed from AUPO8054A external-priority patent/AUPO805497A0/en
Priority claimed from AUPO8001A external-priority patent/AUPO800197A0/en
Priority claimed from AUPO8058A external-priority patent/AUPO805897A0/en
Priority claimed from AUPO8071A external-priority patent/AUPO807197A0/en
Priority claimed from AUPO7950A external-priority patent/AUPO795097A0/en
Priority claimed from AUPO8004A external-priority patent/AUPO800497A0/en
Priority claimed from AUPO8041A external-priority patent/AUPO804197A0/en
Priority claimed from AUPO8067A external-priority patent/AUPO806797A0/en
Priority claimed from AUPO8059A external-priority patent/AUPO805997A0/en
Priority claimed from AUPO8035A external-priority patent/AUPO803597A0/en
Priority claimed from AUPO8069A external-priority patent/AUPO806997A0/en
Priority claimed from AUPO8055A external-priority patent/AUPO805597A0/en
Priority claimed from AUPO8056A external-priority patent/AUPO805697A0/en
Priority claimed from AUPO8044A external-priority patent/AUPO804497A0/en
Priority claimed from AUPO8049A external-priority patent/AUPO804997A0/en
Priority claimed from AUPO8053A external-priority patent/AUPO805397A0/en
Priority claimed from AUPO7949A external-priority patent/AUPO794997A0/en
Priority claimed from AUPO8061A external-priority patent/AUPO806197A0/en
Priority claimed from AUPO8047A external-priority patent/AUPO804797A0/en
Priority claimed from AUPO8073A external-priority patent/AUPO807397A0/en
Priority claimed from AUPO8036A external-priority patent/AUPO803697A0/en
Priority claimed from AUPO8072A external-priority patent/AUPO807297A0/en
Priority claimed from AUPO8065A external-priority patent/AUPO806597A0/en
Priority claimed from AUPP3982A external-priority patent/AUPP398298A0/en
Priority claimed from AUPP3983A external-priority patent/AUPP398398A0/en
Priority to EP04024059A priority Critical patent/EP1512535B1/fr
Priority to EP04024058A priority patent/EP1508444B1/fr
Application filed by Silverbrook Research Pty Ltd filed Critical Silverbrook Research Pty Ltd
Priority to EP04024066A priority patent/EP1508446B1/fr
Priority to EP04024064A priority patent/EP1508445B1/fr
Priority to EP04024063A priority patent/EP1510340B1/fr
Priority to EP04024057A priority patent/EP1508443B1/fr
Priority to EP04024065A priority patent/EP1510341B1/fr
Priority to EP04024060A priority patent/EP1510339B1/fr
Priority to EP04024061A priority patent/EP1508448B1/fr
Priority to EP04024062A priority patent/EP1508449B1/fr
Publication of EP0999933A1 publication Critical patent/EP0999933A1/fr
Publication of EP0999933A4 publication Critical patent/EP0999933A4/fr
Publication of EP0999933B1 publication Critical patent/EP0999933B1/fr
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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
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/44—Typewriters or selective printing mechanisms having dual functions or combined with, or coupled to, apparatus performing other functions
    • B41J3/445—Printers integrated in other types of apparatus, e.g. printers integrated in cameras
    • 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
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2/14314—Structure of ink jet print heads with electrostatically actuated membrane
    • 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
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2/14427—Structure of ink jet print heads with thermal bend detached actuators
    • 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
    • B41J2/16—Production of nozzles
    • B41J2/1621—Manufacturing processes
    • B41J2/1623—Manufacturing processes bonding and adhesion
    • 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
    • B41J2/16—Production of nozzles
    • B41J2/1621—Manufacturing processes
    • B41J2/1626—Manufacturing processes etching
    • B41J2/1628—Manufacturing processes etching dry etching
    • 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
    • B41J2/16—Production of nozzles
    • B41J2/1621—Manufacturing processes
    • B41J2/1626—Manufacturing processes etching
    • B41J2/1629—Manufacturing processes etching wet etching
    • 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
    • B41J2/16—Production of nozzles
    • B41J2/1621—Manufacturing processes
    • B41J2/1631—Manufacturing processes photolithography
    • 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
    • B41J2/16—Production of nozzles
    • B41J2/1621—Manufacturing processes
    • B41J2/1632—Manufacturing processes machining
    • 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
    • B41J2/16—Production of nozzles
    • B41J2/1621—Manufacturing processes
    • B41J2/1635—Manufacturing processes dividing the wafer into individual chips
    • 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
    • B41J2/16—Production of nozzles
    • B41J2/1621—Manufacturing processes
    • B41J2/1637—Manufacturing processes molding
    • B41J2/1639—Manufacturing processes molding sacrificial molding
    • 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
    • B41J2/16—Production of nozzles
    • B41J2/1621—Manufacturing processes
    • B41J2/164—Manufacturing processes thin film formation
    • B41J2/1642—Manufacturing processes thin film formation thin film formation by CVD [chemical vapor deposition]
    • 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
    • B41J2/16—Production of nozzles
    • B41J2/1621—Manufacturing processes
    • B41J2/164—Manufacturing processes thin film formation
    • B41J2/1643—Manufacturing processes thin film formation thin film formation by plating
    • 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
    • B41J2/16—Production of nozzles
    • B41J2/1621—Manufacturing processes
    • B41J2/164—Manufacturing processes thin film formation
    • B41J2/1645—Manufacturing processes thin film formation thin film formation by spincoating
    • 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
    • B41J2/16—Production of nozzles
    • B41J2/1621—Manufacturing processes
    • B41J2/164—Manufacturing processes thin film formation
    • B41J2/1646—Manufacturing processes thin film formation thin film formation by sputtering
    • 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
    • B41J2/16—Production of nozzles
    • B41J2/1648—Production of print heads with thermal bend detached actuators
    • 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
    • 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
    • B41J2002/041—Electromagnetic transducer

Definitions

  • the present invention relates to the field of ink jet printing systems.
  • US Patent 3596275 by Sweet also discloses a process of a continuous ink jet printing including the step wherein the ink jet stream is modulated by a high frequency electro-static field so as to cause drop separation. This technique is still utilised by several manufacturers including Elmjet and Scitex (see also US Patent No. 3373437 by Sweet et al)
  • Piezo-electric ink jet printers are also one form of commonly utilised ink jet printing device. Piezo-electric systems are disclosed by Kyser et. al. in US Patent No. 3946398 (1970) which utilises a diaphragm mode of operation, by Zolten in US Patent 3683212 (1970) which discloses a squeeze mode of operation of a piezo electric crystal, Stemme in US Patent No. 3747120 (1972) discloses a bend mode of piezo-electric operation, Howkins in US Patent No. 4459601 discloses a Piezo electric push mode actuation of the ink jet stream and Fischbeck in US 4584590 which discloses a sheer mode type of piezo-electric transducer element.
  • the ink jet printing techniques include those disclosed by Endo et al in GB 2007162 (1979) and Vaught et al in US Patent 4490728. Both the aforementioned references disclosed ink jet printing techniques rely upon the activation of an electrothermal actuator which results in the creation of a bubble in a constricted space, such as a nozzle, which thereby causes the ejection of ink from an aperture connected to the confined space onto a relevant print media.
  • Printing devices utilising the electro-thermal actuator are manufactured by manufacturers such as Canon and Hewlett Packard.
  • a printing technology should have a number of desirable attributes. These include inexpensive construction and operation, high speed operation, safe and continuous long term operation etc. Each technology may have its own advantages and disadvantages in the areas of cost, speed, quality, reliability, power usage, simplicity of construction operation, durability and consumables.
  • esoteric techniques are also often utilized. These can include electroforming of nickel stage (Hewlett-Packard Journal, Vol. 36 no 5, pp33-37 (1985)), electro-discharge machining, laser ablation (U.S. Patent No. 5,208,604), micro-punching, etc.
  • GB-A-2,262,152 describes a solenoid valve for use in an inkjet printer.
  • the valve comprises an axially elongated body member having a plunger therein for reciprocation along a bore. Motion of the plunger is controlled under the influence of a magnetic field generated by a coil. In use the plunger is used to close an outlet to thereby prevent ink under pressure from being ejected through the outlet. Motion of the plunger can therefore be used to selectively eject ink from the outlet.
  • JP-4126255 describes an inkjet print head having a number of electromagnets arranged opposed to each of a number of nozzle openings.
  • a permanent magnet is pressed to the upper end of each electromagnetic coil by a spring.
  • Ink is supplied from the exterior of a frame and filled up to the nozzle opening.
  • a drive voltage is applied to the electromagnetic coil the permanent magnet and return spring are displaced causing ink to be expelled from the nozzle.
  • an ink jet printing nozzle arrangement comprises:
  • the nozzle arrangement typically further comprises an armature plate constructed from soft magnetic material and wherein said plunger is attracted to said armature plate on the activation of said coil.
  • the electric coil is usually located within a cavity defined by said plunger and wherein said cavity has its dimensions reduced as a result of movement of said plunger, said plunger further having a series of fluid release slots in fluid communication with said cavity and said ink chamber, said fluid release slots allowing for the expulsion of fluid under pressure in said cavity.
  • the slots are typically defined around an inner circumference of said coil and said slots have a substantially constant cross-sectional profile.
  • the slots are preferably located in a radial manner on one surface of said plunger.
  • the nozzle arrangement preferably further comprises a resilient means for assisting in the return of said plunger from said ink ejection position to said ink loaded position after the ejection of ink from said ink ejection port.
  • the resilient means typically comprises a torsional spring.
  • the torsional spring is generally of an arcuate construction having a circumferential profile substantially the same as that of said plunger.
  • the nozzle apparatus usually further comprises a series of resilient means attached to said magnetic piston so as to return said magnetic piston to said first position upon deactivation of said activation coil.
  • the apparatus is generally constructed utilising semi-conductor fabrication techniques.
  • the piston and/or said coils are typically constructed from a dual damascene process.
  • the ink ejection port typically includes a nozzle rim adapted to reduce hydrophilic surface spreading of said ink.
  • the activation coil is generally constructed from a copper deposition process.
  • the resilient means can be constructed from silicon nitride.
  • the plunger can be substantially circular and has a tapered rim adjacent portions of said electromagnetic device.
  • the electromagnetic device is typically of a torus shape and said plunger is located in the center of said torus.
  • the plunger is preferably further connected to a resilient means which allows for the return of said plunger to its original position upon deactivation of said electromagnetic device.
  • the resilient means may be a series of springs.
  • the springs can be interconnedcted to a central portion of said plunger and radially spiral out to said side walls.
  • the springs may be formed from tensional release of deposited material.
  • the deposited material can include nitride.
  • the preferred embodiments and other embodiments will be discussed under separate headings with the heading including an IJ number for ease of reference.
  • the headings also include a type designator with T indicating thermal, S indicating shutter type and F indicating a field type.
  • Fig. 1 there is illustrated an exploded perspective view illustrating the construction of a single ink jet nozzle 4 in accordance with the principles of the present invention.
  • the nozzle 4 operates on the principle of electro-mechanical energy conversion and comprises a solenoid 11 which is connected electrically at a first end 12 to a magnetic plate 13 which is in turn connected to a current source e.g. 14 utilized to activate the ink nozzle 4.
  • the magnetic plate 13 can be constructed from electrically conductive iron.
  • a second magnetic plunger 15 is also provided, again being constructed from soft magnetic iron. Upon energizing the solenoid 11, the plunger 15 is attracted to the fixed magnetic plate 13. The plunger thereby pushes against the ink within the nozzle 4 creating a high pressure zone in the nozzle chamber 17. This causes a movement of the ink in the nozzle chamber 17 and in a first design, subsequent ejection of an ink drop.
  • a series of apertures e.g. 20 is provided so that ink in the region of solenoid 11 is squirted out of the holes 20 in the top of the plunger 15 as it moves towards lower plate 13. This prevents ink trapped in the area of solenoid 11 from increasing the pressure on the plunger 15 and thereby increasing the magnetic forces needed to move the plunger 15.
  • Fig. 2 there is illustrated 30 a timing diagram of the plunger current control signal.
  • the solenoid current is activated 31 for the movement of the plunger and ejection of a drop from the ink nozzle.
  • the current to the solenoid is turned off.
  • a reverse current is applied having approximately half the magnitude of the forward current.
  • the reverse current 32 causes the plunger to move backwards towards its original position.
  • a series of torsional springs 22, 23 (Fig. 1) also assists in the return of the plunger to its original position.
  • a meniscus at the nozzle tip is formed with an approximately a concave hemispherical surface.
  • the surface tension will exert a net forward force on the ink which will result in nozzle refilling.
  • the repetition rate of the nozzle 4 is therefore principally determined by the nozzle refill time which will be 100micro- seconds, depending on the device geometry, ink surface tension and the volume of the ejected drop.
  • Fig. 3 an important aspect of the operation of the electro-magnetically driven print nozzle will now be described.
  • the plate 15 Upon a current flowing through the coil 11, the plate 15 becomes strongly attracted to the plate 13.
  • the plate 15 experiences a downward force and begins movement towards the plate 13. This movement imparts a momentum to the ink within the nozzle chamber 17.
  • the ink is subsequently ejected as hereinbefore described.
  • the movement of the plate 15 causes a build-up of pressure in the area 64 between the plate 15 and the coil 11. This build-up would normally result in a reduced effectiveness of the plate 15 in ejecting ink.
  • the plate 15 preferably includes a series of apertures e.g. 20 which allow for the flow of ink from the area 64 back into the ink chamber and thereby allow a reduction in the pressure in area 64. This results in an increased effectiveness in the operation of the plate 15.
  • the apertures 20 are of a teardrop shape increasing in diameter with increasing radial distance of the plunger.
  • the aperture profile thereby providing minimal disturbance of the magnetic flux through the plunger while maintaining structural integrity of plunger 15.
  • the current through coil 11 is reversed resulting in a repulsion of the two plates 13, 15. Additionally, the torsional spring e.g. 23 acts to return the plate 15 to its initial position.
  • a torsional spring e.g. 23 has a number of substantial benefits including a compact layout, and the construction of the torsional spring from the same material and same processing steps as that of the plate 15.
  • the top surface of plate 15 does not include a series of apertures. Rather, the inner radial surface 25 of plate 15 comprises slots of substantially constant cross-sectional profile in fluid communication between the nozzle chamber 17 and the area 64 between plate 15 and the solenoid 11.
  • the plate 15 Upon activation of the coil 11, the plate 15 is attracted to the armature plate 13 and experiences a force directed towards plate 13.
  • fluid in the area 64 is compressed and experiences a higher pressure than its surrounds.
  • the flow of fluid takes place out of the slots in the inner radial surface 25 plate 15 into the nozzle chamber 17.
  • the flow of fluid into chamber 17, in addition to the movement of the plate 15, causes the ejection of ink out of the ink nozzle port 24.
  • the movement of the plate 15 causes the torsional springs, for example 23, to be resiliently deformed.
  • the coil 11 is deactivated and a slight reverse current is applied.
  • the reverse current acts to repel the plate 15 from the armature plate 13.
  • the torsional springs, for example 23, act as additional means to return the plate 15 to its initial or quiescent position.
  • the nozzle apparatus is constructed from the following main parts including a nozzle tip 40 having an aperture 24 which can be constructed from boron doped silicon.
  • the radius of the aperture 24 of the nozzle tip is an important determinant of drop velocity and drop size.
  • CMOS silicon layer 42 is provided upon which is fabricated all the data storage and driving circuitry 41 necessary for the operation of the nozzle 4.
  • a nozzle chamber 17 is also constructed.
  • the nozzle chamber 17 should be wide enough so that viscous drag from the chamber walls does not significantly increase the force required of the plunger. It should also be deep enough so that any air ingested through the nozzle port 24 when the plunger returns to its quiescent state does not extend to the plunger device. If it does, the ingested bubble may form a cylindrical surface instead of a hemispherical surface resulting in the nozzle not refilling properly.
  • a CMOS dielectric and insulating layer containing various current paths parts for the current connection to the plunger device is also provided 44.
  • a fixed plate of ferroelectric material having two parts 13, 46.
  • the two parts 13, 46 are electrically insulated from one another.
  • a solenoid 11 is provided.
  • This can comprise a spiral coil of deposited copper.
  • Preferably a single spiral layer is utilized to avoid fabrication difficulty and copper is used for a low resistivity and high electro-migration resistance.
  • a plunger 15 of ferromagnetic material is provided to maximize the magnetic force generated.
  • the plunger 15 and fixed magnetic plate 13, 46 surround the solenoid 11 as a torus. Thus, little magnetic flux is lost and the flux is concentrated around the gap between the plunger 15 and the fix plate 13, 46.
  • the gap between the fixed plate 13, 46 and the plunger 15 is one of the most important "parts" of the print nozzle 4.
  • the size of the gap will strongly affect the magnetic force generated, and also limits the travel of the plunger 15.
  • a small gap is desirable to achieve a strong magnetic force, but a large gap is desirable to allow longer plunger 15 to travel, and therefore allow smaller plunger radius to be utilized.
  • the springs, e.g. 22, 23 for returning to the plunger 15 to its quiescent position after a drop has been ejected are provided.
  • the springs, e.g. 22, 23 can be fabricated from the same material, and in the same processing step, as the plunger 15.
  • the springs, e.g. 22, 23 act as torsional springs in their interaction with the plunger 15.
  • passivation layers which may be silicon nitride (Si 3 N 4 ), diamond like carbon (DLC), or other chemically inert, highly impermeable layer.
  • the passivation layers are especially important for device lifetime, as the active device will be immersed in the ink.
  • An embodiment of the present invention relies upon the utilisation of a magnetic actuator to "load" a spring, such that, upon deactivation of the magnetic actuator the resultant movement of the spring causes ejection of a drop of ink as the spring returns to its original position.
  • FIG. 22 there is illustrated an exploded perspective view of an ink nozzle arrangement 401 constructed in accordance with an embodiment. It would be understood that an embodiment can be constructed as an array of nozzle arrangements 401 so as to together form a line for printing.
  • the operation of the ink nozzle arrangement 401 of Fig. 22 proceeds by a solenoid 402 being energized by way of a driving circuit 403 when it is desired to print out a ink drop.
  • the energized solenoid 402 induces a magnetic field in a fixed soft magnetic pole 404 and a moveable soft magnetic pole 405.
  • the solenoid power is turned on to a maximum current for long enough to move the moveable pole 405 from its rest position to a stopped position close to the fixed magnetic pole 404.
  • the ink nozzle arrangement 401 of Fig. 59 sits within an ink chamber filled with ink. Therefore, holes 406 are provided in the moveable soft magnetic pole 405 for "squirting" out of ink from around the coil 402 when the plate 405 undergoes movement.
  • the moveable sort magnetic pole is balanced by a fulcrum 408 with a piston head 409. Movement of the magnetic pole 405 closer to the stationary pole 404 causes the piston head 409 to move away from a nozzle chamber 411 drawing air into the chamber 411 via an ink ejection port 413. The piston 409 is then held open above the nozzle chamber 411 by means of maintaining a low "keeper" current through solenoid 402.
  • the keeper level current through solenoid 402 being sufficient to maintain the moveable pole 405 against the fixed soft magnetic pole 404.
  • the level of current will be substantially less than the maximum current level because the gap between the two poles 404 and 405 is at a minimum. For example, a keeper level current of 10% of the maximum current level may be suitable.
  • the meniscus of ink at the nozzle tip or ink ejection port 413 is a concave hemisphere due to the in flow of air.
  • the surface tension on the meniscus exerts a net force on the ink which results in ink flow from the ink chamber into the nozzle chamber 411. This results in the nozzle chamber refilling, replacing the volume taken up by the piston head 409 which has been withdrawn. This process takes approximately 100 ⁇ s.
  • solenoid 402 The current within solenoid 402 is then reversed to half that of the maximum current.
  • the reversal demagnetizes the magnetic poles and initiates a return of the piston 409 to its rest position.
  • the piston 409 is moved to its normal rest position by both the magnetic repulsion and by the energy stored in a stressed torsional spring 416,419 which was put in a state of torsion upon the movement of moveable pole 405.
  • the solenoid reverse current is turned off.
  • the current is tumed off when the residual magnetism of the movable pole is at a minimum.
  • the piston 409 continues to move towards its original rest position.
  • the piston 409 will overshoot the quiescent or rest position due to its inertia. Overshoot in the piston movement achieves two things: greater ejected drop volume and velocity, and improved drop break off as the piston returns from overshoot to its quiescent position.
  • the piston 409 will eventually return from overshoot to the quiescent position. This return is caused by the springs 416, 419 which are now stressed in the opposite direction.
  • the piston return "sucks” some of the ink back into the nozzle chamber 411, causing the ink ligament connecting the ink drop to the ink in the nozzle chamber 411 to thin.
  • the forward velocity of the drop and the back ward velocity of the ink in the nozzle chamber 411 are resolved by the ink drop breaking off from the ink in the nozzle chamber 411.
  • the piston 409 stays in the quiescent position until the next drop ejection cycle.
  • a liquid ink print head has one ink nozzle arrangement 401 associated with each of the multitude of nozzles.
  • the arrangement 401 has the following major parts:
  • the force produced by a moveable magnetic pole by an electromagnetic induced field is approximated proportional to the inverse square of the gap between the moveable 405 and static magnetic poles 404.
  • this gap is at a maximum.
  • the solenoid 402 is turned on, the moving pole 405 is attracted to the static pole 404.
  • the force increases, accelerating the movable pole 405 faster.
  • the velocity increases in a highly non-linear fashion, approximately with the square of time.
  • the acceleration of the moving pole 405 is greatest at the beginning and then slows as the spring elastic stress falls to zero. As a result, the velocity of the moving pole 405 is more uniform during the reverse stroke movement.
  • the print head is fabricated from two silicon wafers.
  • a first wafer is used to fabricate the print nozzles (the print head wafer) and a second wafer (the Ink Channel Wafer) is utilized to fabricate the various ink channels in addition to providing a support means for the first channel.
  • the fabrication process then proceeds as follows:
  • Fig. 23 shows a perspective view, in part in section, of a single ink jet nozzle arrangement 401 constructed in accordance with an embodiment.
  • an ink jet nozzle which incorporates a plunger that is surrounded by an electromagnetic device.
  • the plunger is made from a magnetic material such that upon activation of the magnetic device, the plunger is forced towards a nozzle outlet port thereby resulting in the ejection of ink from the outlet port.
  • the plunger Upon deactivation of the electromagnet, the plunger returns to its rest position via the utilisation of a series of springs constructed to return the electromagnet to its rest position.
  • Fig. 42 illustrates a sectional view through a single ink jet nozzle 1310 as constructed with an embodiment.
  • the ink jet nozzle 1310 includes a nozzle chamber 1311 which is connected to a nozzle output port 1312 for the ejection of ink.
  • the ink is ejected by means of a tapered plunger device 1314 which is made of a soft magnetic material such as nickel-ferrous material (NIFE).
  • the plunger 1314 includes tapered end portions, e.g. 1316, in addition to interconnecting nitride springs, e.g. 1317.
  • An electromagnetic device is constructed around the plunger 1314 and includes outer soft magnetic material 1319 which surrounds a copper current carrying wire core 1320 with a first end of the copper coil 1320 connected to a first portion of a nickel- ferrous material and a second end of the copper coil is connected to a second portion of the nickel-ferrous material.
  • the circuit being further formed by means of vias (not shown) connecting the current carrying wire to lower layers which can take the structure of standard CMOS fabrication layers.
  • the tapered plunger portions 1316 Upon activation of the electromagnet, the tapered plunger portions 1316 attracted to the electromagnet.
  • the tapering allows for the forces to be resolved by means of downward movement of the overall plunger 1314, the downward movement thereby causing the ejection of ink from ink ejection port 1312. In due course, the plunger will move to a stable state having a top surface substantially flush with the electromagnet.
  • the plunger 1314 Upon turning the power off, the plunger 1314 will return to its original position as a result of energy stored within that nitride springs 1317.
  • the nozzle chamber 1311 is refilled by inlet holes 1322 from the ink reservoir 1323.
  • Fig. 43 there is illustrated an exploded perspective of the various layers ulitized in construction of a single nozzle 1310.
  • the bottom layer 1330 can be formed by back etching a silicon wafer which has a boron dope epitaxial layer as the etch stop.
  • the boron dope layer 1330 can be further individually masked and etched so as to form nozzle rim 1331 and the nozzle ejection port 1312.
  • a silicon layer 1332 is formed.
  • the silicon layer 1332 can be formed as part of the original wafer having the buried boron doped layer 1330.
  • the nozzle chamber proper can be formed substantially from high density low pressure plasma etching of the silicon layer 1332 so as to produce substantially vertical side walls thereby forming the nozzle chamber.
  • a glass layered 1333 which can include the drive and control circuitry required for driving an array of nozzles 1310.
  • the drive and control circuitry can comprise standard two level metal CMOS circuitry intra-connected to form the copper coil circuit by means of vias though upper layers (not shown).
  • a nitride passivation layer 1334 is provided so as to passivate any lower glass layers, e.g. 1333, from sacrificial etches should a sacrificial etching be utilized in the formation of portions of the nozzle.
  • nitride layer 1334 On top of the nitride layer 1334 is formed a first nickel-ferrous layer 1336 followed by a copper layer 1337 and a further nickel-ferrous layer 1338 which can be formed via a dual damascene process. On top of the layer 1338 is formed the final nitride spring layer 1340 with the springs being formed by means of semiconductor treatment of the nitride layer 1340 so as to release the springs in tension so as to thereby cause a slight rating of the plunger 1314. A number of techniques not disclosed in Fig. 228 can be utilized in the construction of various portions of the arrangement 1310.
  • the nozzle chamber can be formed by utilizing the aforementioned plasma etch and then subsequently filling the nozzle chamber with sacrificial material such as glass so as to provide a support for the plunger 1314 with the plunger 1314 being subsequently released via sacrificial etching of the sacrificial layers.
  • sacrificial material such as glass
  • the tapered end portions of the nickel-ferrous material can be formed so that the utilisation of a half-tone mask having an intensity pattern corresponding to the desired bottom tapered profile of plunger 1314.
  • the half-tone mask can be utilized to half-tone a resist so that the shape is transferred to the resist and subsequently to a lower layer, such as sacrificial glass on top of which is laid the nickel-ferrous material which can be finally planarised utilizing chemical mechanical planarization techniques.
  • the presently disclosed ink jet printing technology is potentially suited to a wide range of printing system including: colour and monochrome office printers, short run digital printers, high speed digital printers, offset press supplemental printers, low cost scanning printers high speed pagewidth printers, notebook computers with inbuilt pagewidth printers, portable colour and monochrome printers, colour and monochrome copiers, colour and monochrome facsimile machines, combined printer, facsimile and copying machines, label printers, large format plotters, photograph copiers, printers for digital photographic "minilabs", video printers, PhotoCD printers, portable printers for PDAs, wallpaper printers, indoor sign printers, billboard printers, fabric printers, camera printers and fault tolerant commercial printer arrays.
  • the embodiments of the invention use an ink jet printer type device. Of course many different devices could be used. However presently popular ink jet printing technologies are unlikely to be suitable.
  • thermal inkjet The most significant problem with thermal inkjet is power consumption. This is approximately 100 times that required for high speed, and stems from the energy-inefficient means of drop ejection. This involves the rapid boiling of water to produce a vapor bubble which expels the ink. Water has a very high heat capacity, and must be superheated in thermal inkjet applications. This leads to an efficiency of around 0.02%, from electricity input to drop momentum (and increased surface area) out.
  • piezoelectric inkjet The most significant problem with piezoelectric inkjet is size and cost. Piezoelectric crystals have a very small deflection at reasonable drive voltages, and therefore require a large area for each nozzle. Also, each piezoelectric actuator must be connected to its drive circuit on a separate substrate. This is not a significant problem at the current limit of around 300 nozzles per print head, but is a major impediment to the fabrication of pagewide print beads with 19,200 nozzles.
  • the inktet technologies used meet the stringent requirements of in-camera digital color printing and other high quality, high speed, low cost printing applications.
  • new inkjet technologies have been created.
  • the target features include:
  • inkjet designs shown here at suitable for a wide range of digital printing systems, from battery powered one-time use digital cameras, through to desktop and network printers, and through to commercial printing systems
  • the print head is designed to be a monolithic 0.5 micron CMOS chip with MEMS post processing.
  • the print head is 100 mm long, with a width which depends upon the inkjet type.
  • the smallest print head designed is IJ38, which is 0.35 mm wide, giving a chip area of 35 square mm.
  • the print heads each contain 19,200 nozzles plus data and control circuitry.
  • Ink is supplied to the back of the print head by injection molded plastic ink channels.
  • the molding requires 50 micron features, which can be created using a lithographically micromachined insert in a standard injection molding tool.
  • Ink flows through holes etched through the wafer to the nozzle chambers fabricated on the front surface of the wafer.
  • the print head is connected to the camera circuitry by tape automated bonding.
  • inkjet configurations can readily be derived from these 45 examples by substituting alternative configurations along one or more of the 11 axes.
  • Most of the IJ01 to IJ45 examples can be made into inkjet print heads with characteristics superior to any currently available inkjet technology.
  • Suitable applications include: Home printers, Office network printers, Short run digital printers, Commercial print systems, Fabric printers, Pocket Printers, Internet WWW printers, Video printers, Medical imaging, Wide format printers, Notebook PC printers, Fax machines, Industrial printing systems, Photocopiers, Photographic minilabs etc.
  • the present application may utilize advanced semiconductor fabrication techniques in the construction of large arrays of ink jet printers. Suitable manufacturing techniques are described in the following Australian provisional patent specifications incorporated here by cross-reference: Australian Provisional Number Filing Date Title PO7935 15-Jul-97 A Method of Manufacture of an Image Creation Apparatus (IJM01) PO7936 15-Jul-97 A Method of Manufacture of an Image Creation Apparatus (IJM02) PO7937 15-Jul-97 A Method of Manufacture of an Image Creation Apparatus (IJM03) PO8061 15-Jul-97 A Method of Manufacture of an Image Creation Apparatus (IJM04) PO8054 15-Jul-97 A Method of Manufacture of an Image Creation Apparatus (IJM05) PO8065 15-Jul-97 A Method of Manufacture of an Image Creation Apparatus (IJM06) PO8055 15-Jul-97 A Method of Manufacture of an Image Creation
  • the present application may utilize an ink delivery system to the ink jet head.
  • Delivery systems relating to the supply of ink to a series of ink jet nozzles are described in the following Australian provisional patent specifications, the disclosure of which are hereby incorporated by cross-reference: Australian Provisional Number Filing Date Title PO8003 15-Jul-97 Supply Method and Apparatus (F1) PO8005 15-Jul-97 Supply Method and Apparatus (F2) PO9404 23-Sep-97 A Device and Method (F3)
  • the present application may utilize advanced semiconductor microelectromechanical techniques in the construction of large arrays of ink jet printers. Suitable microelectromechanical techniques are described in the following Australian provisional patent specifications incorporated here by cross-reference: Australian Provisional Number Filing Date Title PO7943 15-Jul-97 A device (MEMS01) PO8006 15-Jul-97 A device (MEMS02) PO8007 15-Jul-97 A device (MEMS03) PO8008 15-Jul-97 A device (MEMS04) PO8010 15-Jul-97 A device (MEMS05) PO8011 15-Jul-97 A device (MEMS06) PO7947 15-Jul-97 A device (MEMS07) PO7945 15-Jul-97 A device (MEMS08) PO7944 15-Jul-97 A device (MEMS09) PO7946 15-Jul-97 A device (MEMS10) PO9393 23-Sep-97 A Device and Method (MEMS11) PP0875 12-Dec-97 A Device
  • the present application may include the utilization of a disposable camera system such as those described in the following Australian provisional patent specifications incorporated here by cross-reference: Australian Provisional Number Filing Date Title PP0895 12-Dec-97 An Image Creation Method and Apparatus (IR01) PP0870 12-Dec-97 A Device and Method (IR02) PP0869 12-Dec-97 A Device and Method (IR04) PP0887 12-Dec-97 Image Creation Method and Apparatus (IR05) PP0885 12-Dec-97 An Image Production System (IR06) PP0884 12-Dec-97 Image Creation Method and Apparatus (IR10) PP0886 12-Dec-97 Image Creation Method and Apparatus (IR12) PP0871 12-Dec-97 A Device and Method (IR13) PP0876 12-Dec-97 An Image Processing Method and Apparatus (IR14) PP0877 12-Dec-97 A Device and Method (IR16) PP0878 12-Dec-97 A Device and Method (IR17) PP08
  • the present application may include the utilization of a data distribution system such as that described in the following Australian provisional patent specifications incorporated here by cross-reference: Australian Provisional Number Filing Date Title PP2370 16-Mar-98 Data Processing Method and Apparatus (Dot01) PP2371 16-Mar-98 Data Processing Method and Apparatus (Dot02)
  • the present application may include the utilization of camera and data processing techniques such as an Artcam type device as described in the following Australian provisional patent specifications incorporated here by cross-reference: Australian Provisional Number Filing Date Title PO7991 15-Jul-97 Image Processing Method and Apparatus (ART01) PO8505 11-Aug-97 Image Processing Method and Apparatus (ART01a) PO7988 15-Jul-97 Image Processing Method and Apparatus (ART02) PO7993 15-Jul-97 Image Processing Method and Apparatus (ART03) PO8012 15-Jul-97 Image Processing Method and Apparatus (ART05) PO8017 15-Jul-97 Image Processing Method and Apparatus (ART06) PO8014 15-Jul-97 Media Device (ART07) PO8025 15-Jul-97 Image Processing Method and Apparatus (ART08) PO8032 15-Jul-97 Image Processing Method and Apparatus (ART09) PO7999 15-Jul-97 Image Processing Method and Apparatus (ART10) PO

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Ink Jet (AREA)

Claims (21)

  1. Agencement de buse d'impression à jet d'encre comprenant:
    a) un plongeur;
    b) une bobine électrique située d'une manière adjacente au plongeur et reliée électriquement à un signal d'activation de buse, dans lequel, lors de l'activation du signal d'activation, ledit plongeur est amené par ladite bobine à passer d'une position chargée en encre à une position d'éjection d'encre en provoquant ainsi l'éjection de l'encre d'un orifice d'éjection d'encre, caractérisé en ce que l'agencement comprend en outre:
    i) une chambre de buse comportant un orifice d'éjection d'encre à une extrémité; et,
    ii) une chambre d'encre permettant l'amenée de l'encre à ladite chambre de buse, le plongeur étant construit en un matériau magnétique mou et étant positionné entre la chambre de buse et la chambre d'encre.
  2. Agencement de buse d'éjection d'encre selon la revendication 1, l'agencement de buse comprenant en outre une plaque d'induit réalisée en un matériau magnétique mou, et où ledit plongeur est attiré vers ladite plaque d'induit lors de l'activation de ladite bobine.
  3. Agencement de buse d'impression à jet d'encre selon la revendication 1 ou la revendication 2, où ladite bobine électrique se situe dans une cavité définie par ledit plongeur, et où ladite cavité a ses dimensions réduites par suite du mouvement dudit plongeur, ledit plongeur comportant en outre une série de fentes de libération de fluide en communication fluidique avec ladite cavité et ladite chambre d'encre, lesdites fentes de libération de fluide permettant l'expulsion du fluide sous pression dans ladite cavité.
  4. Buse d'impression à jet d'encre selon la revendication 3, où lesdites fentes sont définies autour d'une circonférence interne de ladite bobine, et lesdites fentes ont un profil en sect ion transversale sensiblement constant.
  5. Buse d'impression à jet d'encre selon la revendication 4, où lesdites fentes se situent d'une manière radiale sur une surface dudit plongeur.
  6. Agencement de buse d'impression à jet d'encre selon l'une des reve ndications 1 à 5, l'arrangement de buse comprenant en outre un moyen élastique pour contribuer au retour dudit plongeur de ladite position d'éjection d'encre à ladite position chargée en encre après l'éjection de l'encre depuis ledit orifice d'éjection d'encre.
  7. Agencement de buse d'impression à jet d'encre selon la revendication 6, où ledit moyen élastique comprend un ressort de torsion.
  8. Agencement de buse d'impression à jet d'encre selon la revendication 7, où ledit ressort de torsion est d'une construction arquée ayant un profil circonférentiel qui est sensiblement le même que celui dudit plongeur.
  9. Appareil à buse d'impression à jet d'encre selon l'une des revendications 6 à 8, le moyen élastique étant apte à ramener ledit plongeur magnétique à ladite première position lors de la désactivation de ladite bobine d'activation.
  10. Appareil à buse d'impression à jet d'encre selon l'une des revendications 6 à 9, où ledit moyen élastique est réalisé en nitrure de silicium.
  11. Appareil à buse d'impression à jet d'encre selon l'une des revendications 1 à 10, où ledit appareil est construit en utilisant des techniques de fabrication de semi-conducteur.
  12. Appareil à buse d'impression à jet d'encre selon la revendication 11, où ledit plongeur et/ou lesdites bobines sont construites par un processus de damascène double.
  13. Appareil à buse d'impression à jet d'encre selon l'une des revendications 1 à 12, où ledit orifice d'éjection d'encre comporte un bord de buse apte à réduire l'étalement de surface hydrophile de ladite encre.
  14. Appareil à buse d'impression à jet d'encre selon l'une des revendications 1 à 13, où ladite bobine d'activation est construite par un processus de dépôt de cuivre.
  15. Agencement de buse à jet d'encre selon la revendication 1, où ledit plongeur est sensiblement circulaire et présente un bord diminué adjacent à des portions dudit dispositif électromagnétique.
  16. Agencement de buse à jet d'encre selon la revendication 1 ou la revendication 15, où ledit dispositif électromagnétique est en forme de tore, et ledit plongeur se situe au centre dudit tore.
  17. Agencement de buse à jet d'encre selon la revendication 15 ou la revendication 16, où ledit plongeur est relié en outre à un moyen élastique qui permet le retour dudit plo ngeur à sa position initiale lors de la désactivation dudit dispositif électromagnétique.
  18. Agencement de buse à jet d'encre selon la revendication 17, où ledit moyen élastique est une série de ressorts.
  19. Agencement de buse à jet d'encre selon la revendication 18, où lesdits ressorts sont interconnectés à une portion centrale dudit plongeur et s'étendent en spirale radialement vers lesdites parois latérales.
  20. Agencement de buse à jet d'encre selon la revendication 17 ou la revendication 18, où lesdits ressorts sont réalisés par un relâchement de tension de matériau déposé.
  21. Agencement de buse à jet d'encre selon la revendication 20, où ledit matériau déposé comprend du nitrure.
EP98933350A 1997-07-15 1998-07-15 Buse de jet d'encre, actionne par un champ magnetique Expired - Lifetime EP0999933B1 (fr)

Priority Applications (10)

Application Number Priority Date Filing Date Title
EP04024059A EP1512535B1 (fr) 1997-07-15 1998-07-15 Imprimante à jet d'encre avec piston actionné par force magnétique
EP04024062A EP1508449B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec chambre-actuateur magnétique
EP04024061A EP1508448B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec piston conique magnétique
EP04024060A EP1510339B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre actionnée par des impulsions magnétiques
EP04024065A EP1510341B1 (fr) 1997-07-15 1998-07-15 buse à jet d'encre avec obturateur électromagnétique
EP04024057A EP1508443B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec piston activé par force electro-magnétique
EP04024066A EP1508446B1 (fr) 1997-07-15 1998-07-15 Buse pour imprimante pour jet d'encre avec actionneur à solénoide
EP04024064A EP1508445B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec actuateur à force Lorentz
EP04024063A EP1510340B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec piston fenté
EP04024058A EP1508444B1 (fr) 1997-07-15 1998-07-15 Imprimante à jet d'encre avec plaques actionnées par force électrostatique

Applications Claiming Priority (73)

Application Number Priority Date Filing Date Title
AUPO805597 1997-07-15
AUPO793597 1997-07-15
AUPO7950A AUPO795097A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM11)
AUPO8004A AUPO800497A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ26)
AUPO8041A AUPO804197A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ25)
AUPO804997 1997-07-15
AUPO793397 1997-07-15
AUPO805897 1997-07-15
AUPO8067A AUPO806797A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ16)
AUPO806197 1997-07-15
AUPO807397 1997-07-15
AUPO794997 1997-07-15
AUPO8059A AUPO805997A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM14)
AUPO806397 1997-07-15
AUPO805997 1997-07-15
AUPO806097 1997-07-15
AUPO805697 1997-07-15
AUPO8035A AUPO803597A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ06)
AUPO8069A AUPO806997A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ11)
AUPO806997 1997-07-15
AUPO793697 1997-07-15
AUPO8055A AUPO805597A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM07)
AUPO795097 1997-07-15
AUPO8056A AUPO805697A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ10)
AUPO807597 1997-07-15
AUPO8053A AUPO805397A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM08)
AUPO806797 1997-07-15
AUPO8049A AUPO804997A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ12)
AUPO8044A AUPO804497A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ07)
AUPO803597 1997-07-15
AUPO8066A AUPO806697A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ01)
AUPO8063A AUPO806397A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ08)
AUPO8047A AUPO804797A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ05)
AUPO805497 1997-07-15
AUPO8073A AUPO807397A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM15)
AUPO8036A AUPO803697A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ13)
AUPO8072A AUPO807297A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ02)
AUPO8065A AUPO806597A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM06)
AUPO807097 1997-07-15
AUPO805397 1997-07-15
AUPO7949A AUPO794997A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM12)
AUPO804797 1997-07-15
AUPO800497 1997-07-15
AUPO8071A AUPO807197A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ04)
AUPO8058A AUPO805897A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM26)
AUPO807297 1997-07-15
AUPO804197 1997-07-15
AUPO8001A AUPO800197A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ17)
AUPO803697 1997-07-15
AUPO8054A AUPO805497A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM05)
AUPO8070A AUPO807097A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ15)
AUPO7936A AUPO793697A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM02)
AUPO7933A AUPO793397A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation_apparatus (IJM10)
AUPO8048A AUPO804897A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ14)
AUPO8076A AUPO807697A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM16)
AUPO806597 1997-07-15
AUPO8060A AUPO806097A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM13)
AUPO8075A AUPO807597A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM17)
AUPO807697 1997-07-15
AUPO7935A AUPO793597A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM01)
AUPO807797 1997-07-15
AUPO804497 1997-07-15
AUPO806697 1997-07-15
AUPO804897 1997-07-15
AUPO800197 1997-07-15
AUPO8061A AUPO806197A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM04)
AUPO807197 1997-07-15
AUPO8077A AUPO807797A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM25)
AUPP3983A AUPP398398A0 (en) 1998-06-09 1998-06-09 Image creation method and apparatus (ij45)
AUPP398298 1998-06-09
AUPP3982A AUPP398298A0 (en) 1998-06-09 1998-06-09 A method of manufacture of an image creation apparatus (ijm45)
AUPP398398 1998-06-09
PCT/AU1998/000548 WO1999003680A1 (fr) 1997-07-15 1998-07-15 Jet d'encre actionne par un champ

Related Child Applications (20)

Application Number Title Priority Date Filing Date
EP04024058A Division EP1508444B1 (fr) 1997-07-15 1998-07-15 Imprimante à jet d'encre avec plaques actionnées par force électrostatique
EP04024064A Division EP1508445B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec actuateur à force Lorentz
EP04024065A Division EP1510341B1 (fr) 1997-07-15 1998-07-15 buse à jet d'encre avec obturateur électromagnétique
EP04024066A Division EP1508446B1 (fr) 1997-07-15 1998-07-15 Buse pour imprimante pour jet d'encre avec actionneur à solénoide
EP04024060A Division EP1510339B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre actionnée par des impulsions magnétiques
EP04024063A Division EP1510340B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec piston fenté
EP04024057A Division EP1508443B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec piston activé par force electro-magnétique
EP04024062A Division EP1508449B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec chambre-actuateur magnétique
EP04024059A Division EP1512535B1 (fr) 1997-07-15 1998-07-15 Imprimante à jet d'encre avec piston actionné par force magnétique
EP04024061A Division EP1508448B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec piston conique magnétique
EP04024063.2 Division-Into 2004-10-08
EP04024057.4 Division-Into 2004-10-08
EP04024058.2 Division-Into 2004-10-08
EP04024064.0 Division-Into 2004-10-08
EP04024065.7 Division-Into 2004-10-08
EP04024066.5 Division-Into 2004-10-08
EP04024060.8 Division-Into 2004-10-08
EP04024061.6 Division-Into 2004-10-08
EP04024059.0 Division-Into 2004-10-08
EP04024062.4 Division-Into 2004-10-08

Publications (3)

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EP0999933A1 EP0999933A1 (fr) 2000-05-17
EP0999933A4 EP0999933A4 (fr) 2000-12-20
EP0999933B1 true EP0999933B1 (fr) 2005-03-02

Family

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Application Number Title Priority Date Filing Date
EP04024059A Expired - Lifetime EP1512535B1 (fr) 1997-07-15 1998-07-15 Imprimante à jet d'encre avec piston actionné par force magnétique
EP04024061A Expired - Lifetime EP1508448B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec piston conique magnétique
EP04024065A Expired - Lifetime EP1510341B1 (fr) 1997-07-15 1998-07-15 buse à jet d'encre avec obturateur électromagnétique
EP98933350A Expired - Lifetime EP0999933B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre, actionne par un champ magnetique
EP04024060A Expired - Lifetime EP1510339B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre actionnée par des impulsions magnétiques
EP04024058A Expired - Lifetime EP1508444B1 (fr) 1997-07-15 1998-07-15 Imprimante à jet d'encre avec plaques actionnées par force électrostatique
EP04024064A Expired - Lifetime EP1508445B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec actuateur à force Lorentz
EP04024066A Expired - Lifetime EP1508446B1 (fr) 1997-07-15 1998-07-15 Buse pour imprimante pour jet d'encre avec actionneur à solénoide
EP04024057A Expired - Lifetime EP1508443B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec piston activé par force electro-magnétique
EP04024063A Expired - Lifetime EP1510340B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec piston fenté
EP04024062A Expired - Lifetime EP1508449B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec chambre-actuateur magnétique

Family Applications Before (3)

Application Number Title Priority Date Filing Date
EP04024059A Expired - Lifetime EP1512535B1 (fr) 1997-07-15 1998-07-15 Imprimante à jet d'encre avec piston actionné par force magnétique
EP04024061A Expired - Lifetime EP1508448B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec piston conique magnétique
EP04024065A Expired - Lifetime EP1510341B1 (fr) 1997-07-15 1998-07-15 buse à jet d'encre avec obturateur électromagnétique

Family Applications After (7)

Application Number Title Priority Date Filing Date
EP04024060A Expired - Lifetime EP1510339B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre actionnée par des impulsions magnétiques
EP04024058A Expired - Lifetime EP1508444B1 (fr) 1997-07-15 1998-07-15 Imprimante à jet d'encre avec plaques actionnées par force électrostatique
EP04024064A Expired - Lifetime EP1508445B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec actuateur à force Lorentz
EP04024066A Expired - Lifetime EP1508446B1 (fr) 1997-07-15 1998-07-15 Buse pour imprimante pour jet d'encre avec actionneur à solénoide
EP04024057A Expired - Lifetime EP1508443B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec piston activé par force electro-magnétique
EP04024063A Expired - Lifetime EP1510340B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec piston fenté
EP04024062A Expired - Lifetime EP1508449B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre avec chambre-actuateur magnétique

Country Status (4)

Country Link
EP (11) EP1512535B1 (fr)
JP (6) JP4170582B2 (fr)
AT (8) ATE352422T1 (fr)
WO (1) WO1999003680A1 (fr)

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Publication number Publication date
EP1510339B1 (fr) 2007-01-24
JP4137964B2 (ja) 2008-08-20
EP1510340A2 (fr) 2005-03-02
EP1512535B1 (fr) 2007-12-26
EP1508443A3 (fr) 2005-03-16
EP1508443B1 (fr) 2007-03-07
JP4173174B2 (ja) 2008-10-29
EP1508449A1 (fr) 2005-02-23
EP1508444A3 (fr) 2005-03-16
EP1510340A3 (fr) 2005-03-09
JP4170582B2 (ja) 2008-10-22
EP1508445B1 (fr) 2007-01-31
EP0999933A4 (fr) 2000-12-20
JP2007062380A (ja) 2007-03-15
JP2007062381A (ja) 2007-03-15
EP1510339A2 (fr) 2005-03-02
JP2007062382A (ja) 2007-03-15
WO1999003680A1 (fr) 1999-01-28
JP4185538B2 (ja) 2008-11-26
ATE353053T1 (de) 2007-02-15
EP1510341A3 (fr) 2005-03-16
EP1510341A2 (fr) 2005-03-02
ATE352421T1 (de) 2007-02-15
EP0999933A1 (fr) 2000-05-17
EP1508444B1 (fr) 2007-11-21
EP1508448A1 (fr) 2005-02-23
EP1508445A1 (fr) 2005-02-23
ATE289922T1 (de) 2005-03-15
JP2007062383A (ja) 2007-03-15
EP1510341B1 (fr) 2007-01-24
ATE352422T1 (de) 2007-02-15
EP1508443A2 (fr) 2005-02-23
ATE355972T1 (de) 2007-03-15
ATE352423T1 (de) 2007-02-15
ATE381991T1 (de) 2008-01-15
EP1508446A1 (fr) 2005-02-23
EP1508446B1 (fr) 2007-01-10
EP1510339A3 (fr) 2005-03-09
ATE352420T1 (de) 2007-02-15
JP2007062379A (ja) 2007-03-15
EP1508448B1 (fr) 2007-01-17
EP1508444A2 (fr) 2005-02-23
EP1512535A1 (fr) 2005-03-09
JP4171037B2 (ja) 2008-10-22
EP1508449B1 (fr) 2007-01-24
EP1510340B1 (fr) 2007-01-24
JP4137965B2 (ja) 2008-08-20
JP2001510107A (ja) 2001-07-31

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