EP1512535B1 - Imprimante à jet d'encre avec piston actionné par force magnétique - Google Patents

Imprimante à jet d'encre avec piston actionné par force magnétique Download PDF

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Publication number
EP1512535B1
EP1512535B1 EP04024059A EP04024059A EP1512535B1 EP 1512535 B1 EP1512535 B1 EP 1512535B1 EP 04024059 A EP04024059 A EP 04024059A EP 04024059 A EP04024059 A EP 04024059A EP 1512535 B1 EP1512535 B1 EP 1512535B1
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EP
European Patent Office
Prior art keywords
ink
nozzle
actuator
ink jet
nozzle chamber
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
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EP04024059A
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German (de)
English (en)
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EP1512535A1 (fr
Inventor
Kia Silverbrook
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Silverbrook Research Pty Ltd
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Silverbrook Research Pty Ltd
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Priority claimed from AUPO8035A external-priority patent/AUPO803597A0/en
Priority claimed from AUPO8054A external-priority patent/AUPO805497A0/en
Priority claimed from AUPO8066A external-priority patent/AUPO806697A0/en
Priority claimed from AUPO8058A external-priority patent/AUPO805897A0/en
Priority claimed from AUPO8071A external-priority patent/AUPO807197A0/en
Priority claimed from AUPO8059A external-priority patent/AUPO805997A0/en
Priority claimed from AUPO8044A external-priority patent/AUPO804497A0/en
Priority claimed from AUPO8065A external-priority patent/AUPO806597A0/en
Priority claimed from AUPO8036A external-priority patent/AUPO803697A0/en
Priority claimed from AUPO8069A external-priority patent/AUPO806997A0/en
Priority claimed from AUPO7950A external-priority patent/AUPO795097A0/en
Priority claimed from AUPO8048A external-priority patent/AUPO804897A0/en
Priority claimed from AUPO8063A external-priority patent/AUPO806397A0/en
Priority claimed from AUPO7933A external-priority patent/AUPO793397A0/en
Priority claimed from AUPO7935A external-priority patent/AUPO793597A0/en
Priority claimed from AUPO8073A external-priority patent/AUPO807397A0/en
Priority claimed from AUPO8075A external-priority patent/AUPO807597A0/en
Priority claimed from AUPO8055A external-priority patent/AUPO805597A0/en
Priority claimed from AUPO8004A external-priority patent/AUPO800497A0/en
Priority claimed from AUPO8077A external-priority patent/AUPO807797A0/en
Priority claimed from AUPO7949A external-priority patent/AUPO794997A0/en
Priority claimed from AUPO8053A external-priority patent/AUPO805397A0/en
Priority claimed from AUPO8056A external-priority patent/AUPO805697A0/en
Priority claimed from AUPO8001A external-priority patent/AUPO800197A0/en
Priority claimed from AUPO8060A external-priority patent/AUPO806097A0/en
Priority claimed from AUPO8041A external-priority patent/AUPO804197A0/en
Priority claimed from AUPO8070A external-priority patent/AUPO807097A0/en
Priority claimed from AUPO8076A external-priority patent/AUPO807697A0/en
Priority claimed from AUPO8072A external-priority patent/AUPO807297A0/en
Priority claimed from AUPO8061A external-priority patent/AUPO806197A0/en
Priority claimed from AUPO8067A external-priority patent/AUPO806797A0/en
Priority claimed from AUPO8047A external-priority patent/AUPO804797A0/en
Priority claimed from AUPO7936A external-priority patent/AUPO793697A0/en
Priority claimed from AUPO8049A external-priority patent/AUPO804997A0/en
Priority claimed from AUPP3982A external-priority patent/AUPP398298A0/en
Priority claimed from AUPP3983A external-priority patent/AUPP398398A0/en
Application filed by Silverbrook Research Pty Ltd filed Critical Silverbrook Research Pty Ltd
Publication of EP1512535A1 publication Critical patent/EP1512535A1/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 utilized 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 utilized 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 picze-clectric operation, Howkins in US Patent No. 4459601 discloses a Piezo electric push mode actuation of the inkjet 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.
  • JP55059972 describes an inkjet nozzle comprising a magnetic piston actuated by a coil. Ink is ejected by passing current through the coil, which urges the piston in a linear motion towards a nozzle opening. The piston functions as a magnetic pole.
  • 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.
  • 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.
  • 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. 59 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. 59 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 soft 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 turned 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 backward 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 approximately 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. 60 shows a perspective view, in part in section, of a single ink jet nozzle arrangement 401 constructed in accordance with an embodiment.
  • 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 printer, 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 primer, 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 heads with 19,200 nozzles.
  • the inkjet 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 are 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.
  • Actuator mechanism (applied only to selected ink drops)
  • Actuator Mechanism Description Advantages Disadvantages Examples Thermal bubble An electrothermal heater heats the ink to above boiling point, transferring significant heat to the aqueous ink. A bubble nucleates and quickly forms, expelling the ink. The efficiency of the process is low, with typically less than 0.05°% of the electrical energy being transformed into kinetic energy of the drop.
  • Perovskite materials such as tin modified lead lanthanum zirconate titanate (PLZSnT) exhibit large strains of up to 1% associated with the AFE to FE phase transition.
  • ⁇ Low power consumption ⁇ Many ink types can be used ⁇ Fast operation ( ⁇ 1 ⁇ s) ⁇ Relatively high longitudinal strain ⁇ High efficiency Electric field strength of around 3 V/ ⁇ m can be readily provided ⁇ Difficult to integrate with electronics ⁇ Unusual materials such as PLZSnT are required ⁇ Actuators require a large area ⁇ IJ04 Electrostatic: plates Conductive plates are separated by a compressible or fluid dielectric (usually air). Upon application of a voltage, the plates attract each other and displace ink, causing drop ejection.
  • the conductive plates may be in a comb or honeycomb structure, or stacked to increase the surface area and therefore the force.
  • Low power consumption ⁇ Many ink types can be used ⁇ Fast operation ⁇ Difficult to operate electrostatic devices in an aqueous environment ⁇ The electrostatic actuator will normally need to be separated from the ink ⁇ Very large area required to achieve high forces ⁇ High voltage drive transistors may be required ⁇ Full pagewidth print heads are not competitive due to actuator size ⁇ IJ02, IJ04 Electrostatic pull on ink A strong electric field is applied to the ink, whereupon electrostatic attraction accelerates the ink towards the print medium.
  • Examples are: Samarium Cobalt (SaCo) and magnetic materials in the neodymium iron boron family (NdFeB, NdDyFeBNb, NdDyFeB, etc) ⁇ Low power consumption ⁇ Many ink types can be used ⁇ Fast operation ⁇ High efficiency ⁇ Easy extension from single nozzles to pagewidth print heads ⁇ Complex fabrication ⁇ Permanent magnetic material such as Neodymium Iron Boron (NdFeB) required.
  • SaCo Samarium Cobalt
  • NdDyFeBNb neodymium iron boron family
  • NdDyFeB neodymium iron boron family
  • NdFeB Neodymium Iron Boron
  • the actuator should be pre-stressed to approx. 8 MPa.
  • Many ink types can be used ⁇ Fast operation ⁇ Easy extension from single nozzles to pagewidth print heads ⁇ High force is available ⁇ Force acts as a twisting motion ⁇ Unusual materials such as Terfenol-D are required ⁇ High local currents required ⁇ Copper metalization should be used for long electromigration lifetime and low resistivity ⁇ Pre-stressing may be required ⁇ Fischenbeck, USP 4,032,929 ⁇ IJ25 Surface tension reduction Ink under positive pressure is held in a nozzle by surface tension. The surface tension of the ink is reduced below the bubble threshold, causing the ink to egress from the nozzle.
  • a heater fabricated from a conductive material is incorporated.
  • a 50 ⁇ m long PTFE bend actuator with polysilicon heater and 15 mW power input can provide 180 ⁇ N force and 10 ⁇ m deflection.
  • Actuator motions include: 1) Bend 2) Push 3) Buckle 4) Rotate ⁇ High force can be generated ⁇ PTFE is a candidate for low dielectric constant insulation in ULSI ⁇ Very low power consumption ⁇ Many ink types can be used ⁇ Simple planar fabrication ⁇ Small chip area required for each actuator ⁇ Fast operation ⁇ High efficiency ⁇ CMOS compatible voltages and currents ⁇ Easy extension from single nozzles to pagewidth print heads ⁇ Requires special material (e.g.
  • PTFE Requires a PTFE deposition process, which is not yet standard in ULSI fabs ⁇ PTFE deposition cannot be followed with high temperature (above 350 °C) processing ⁇ Pigmented inks may be infeasible, as pigment particles may jam the bend actuator ⁇ IJ09, IJ17, IJ18, IJ20 ⁇ IJ21, IJ22, IJ23, IJ24 ⁇ IJ27, IJ28, IJ29, IJ30 ⁇ IJ31, IJ42, IJ43, IJ44 Conductive polymer thermoelastic actuator A polymer with a high coefficient of thermal expansion (such as PTFE) is doped with conducting substances to increase its conductivity to about 3 orders of magnitude below that of copper.
  • the conducting polymer expands when resistively heated.
  • conducting dopants include: 1) Carbon nanotubes 2) Metal fibers 3) Conductive polymers such as doped polythiophene 4) Carbon granules ⁇ High force can be generated ⁇ Very low power consumption ⁇ Many ink types can be used ⁇ Simple planar fabrication ⁇ Small chip area required for actuator ⁇ Fast operation ⁇ High efficiency ⁇ CMOS compatible voltages and currents ⁇ Easy extension from single nozzles to pagewidth print heads ⁇ Requires special materials development (High CTE conductive polymer) ⁇ Requires a PTFE deposition process, which is not yet standard in ULSI fabs ⁇ PTFE deposition cannot be followed with high temperature (above 350 °C) processing ⁇ Evaporation and CVD deposition techniques cannot be used ⁇ Pigmented inks may be infeasible, as pigment particles may jam the bend actuator ⁇ IJ24 Shape memory alloy A shape memory alloy such as TiNi (also known as Nitinol -
  • Linear Magnetic Actuator Linear magnetic actuators include the Linear Induction Actuator (LIA), Linear Permanent Magnet Synchronous Actuator (LPMSA), Linear Reluctance Synchronous Actuator (LRSA), Linear Switched Reluctance Actuator (LSRA), and the Linear Step
  • Linear Magnetic actuators can be constructed with high thrust, long travel, and high efficiency using planar semiconductor fabrication techniques ⁇ Long actuator travel is available ⁇ Medium force is available ⁇ Low voltage operation ⁇ Requires unusual semiconductor materials such as soft magnetic alloys (e.g. CoNiFe [1]) ⁇ Some varieties also require permanent magnetic materials such as Neodymium iron boron (NdFeB) ⁇ Requires complex multi-phase drive circuitry ⁇ High current operation ⁇ IJ12
  • Actuator directly pushes ink This is the simplest mode of operation: the actuator directly supplies sufficient kinetic energy to expel the drop. The drop must have a sufficient velocity to overcome the tension. ⁇ Simple operation. ⁇ No external fields required ⁇ Satellite drops can be avoided if drop velocity is less then 4 m/s surface ⁇ Can be efficient, depending upon the actuator used ⁇ Drop repetition rate is usually limited to less than 10 KHz However, this is not fundamental to the method, but is related to the refill method normally used ⁇ All of the drop kinetic energy must be provided by the actuator ⁇ Satellite drops usually form if drop velocity is greater than 4.5 m/s ⁇ Thermal inkjet ⁇ Piezoelectric inkjet ⁇ IJ01, IJ02, IJ03, IJ04 ⁇ IJ05, IJ06, IJ07, IJ09 ⁇ IJ11, IJ12, IJ14, IJ16 ⁇ IJ20, IJ22, IJ23, IJ24 ⁇ IJ25
  • Very simple print head fabrication can be used ⁇
  • the drop selection means not need to provide the energy required to separate the drop from the nozzle ⁇
  • Electrostatic field for small nozzle sizes is above air breakdown ⁇
  • Electrostatic field may attract dust ⁇
  • Silverbrook, EP 0771 658 A2 and related patent applications ⁇ Tone-Jet Magnetic pull on ink
  • the drops to be printed are selected by some manner (e.g. thermally induced surface tension reduction of pressurized ink). Selected drops are separated from the ink in the nozzle by a strong magnetic field acting on the magnetic ink.
  • Very simple print head fabrication can be used ⁇
  • the drop selection means does not need to provide the energy required to separate the drop from the nozzle ⁇
  • Requires magnetic ink ⁇
  • Ink colors other than black are difficult ⁇
  • Requires very high magnetic fields ⁇
  • Silverbrook, EP 0771 658 A2 and related patent applications Shutter The actuator moves a shutter to block ink flow to the nozzle.
  • the ink pressure is pulsed at a multiple of the drop ejection frequency.
  • Actuators with small travel can be used
  • Actuators with small force can be used
  • High speed (>50 KHz) operation can be achieved
  • Moving parts are required
  • Requires ink pressure modulator ⁇ Friction and wear must be considered
  • Stiction is possible
  • Pulsed magnetic pull on ink pusher A pulsed magnetic field attracts an 'ink pusher' at the drop ejection frequency.
  • An actuator controls a catch, which prevents the ink pusher from moving when a drop is not to be ejected.
  • Extremely low energy operation is possible
  • No heat dissipation problems ⁇ Requires an external pulsed magnetic field
  • Requires special materials for both the actuator and the ink pusher ⁇ Complex construction ⁇ IJ10
  • the ink pressure oscillation may be achieved by vibrating the print head, or preferably by an actuator in the ink supply.
  • ⁇ Oscillating ink pressure can provide a refill pulse, allowing higher operating speed ⁇
  • the actuators may operate with much lower energy ⁇
  • Acoustic lenses can be used to focus the sound on the nozzles ⁇
  • Requires external ink pressure oscillator ⁇
  • Ink pressure phase and amplitude must be carefully controlled ⁇ Acoustic reflections in the ink chamber must be designed for ⁇ Silverbrook, EP 0771 658 A2 and related patent applications ⁇ IJ08, IJ13, IJ15, IJ17 ⁇ IJ18, IJ19, IJ21 Media proximity The print head is placed in close proximity to the print medium.
  • the actuator directly drives the drop ejection process.
  • Operational simplicity ⁇ Many actuator mechanisms have insufficient travel, or insufficient force, to efficiently drive the drop ejection process ⁇
  • Thermal Bubble Inkjet ⁇ IJ01, IJ02, IJ06, IJ07 ⁇ IJ16, IJ25, IJ26
  • Differential expansion bend actuator An actuator material expands more on one side than on the other. The expansion may be thermal, piezoelectric, magnetostrictive, or other mechanism.
  • the bend actuator converts a high force low travel actuator mechanism to high travel, lower force mechanism.
  • Transient bend actuator A trilayer bend actuator where the two outside layers are identical. This cancels bend due to ambient temperature and residual stress. The actuator only responds to transient heating of one side or the other.
  • Actuator forces may not add linearly, reducing efficiency ⁇ IJ12, IJ13, IJ18, IJ20 ⁇ IJ22, IJ28, IJ42, IJ43 Linear Spring
  • a linear spring is used to transform a motion with small travel and high force into a longer travel, lower force motion.
  • Matches low travel actuator with higher travel requirements ⁇
  • Non-contact method of motion transformation ⁇ Requires print head area for the spring
  • IJ15 Reverse spring The actuator loads a spring. When the actuator is turned off, the spring releases. This can reverse the force/distance curve of the actuator to make it compatible with the force/time requirements of the drop section.
  • the catch either enables or disables movement of an ink pusher that is controlled in a bulk manner.
  • Very low actuator energy ⁇ Very small actuator size ⁇ Complex construction ⁇ Requires external force ⁇ Unsuitable for pigmented inks ⁇ IJ10 Buckle plate
  • a buckle plate can be used to change a slow actuator into a fast motion. It can also convert a high force, low travel actuator into a high travel, medium force motion.
  • Very fast movement achievable ⁇ Must stay within elastic limits of the materials for long device life ⁇ High stresses involved ⁇ Generally high power ⁇ S. Hirata et al, "An Ink-jet Head ", Proc. IEEE requirement MEMS, Feb. 1996, pp 418- 423 .
  • IJ18, IJ27 Tapered magnetic pole A tapered magnetic pole can increase travel at the expense of force.
  • ⁇ Linearizes the magnetic force/distance curve ⁇ Complex construction ⁇ IJ14 Lever A lever and fulcrum is used to transform a motion with small travel and high force into a motion with longer travel and lower force. The lever can also reverse the direction of travel.
  • a small angular deflection of the actuator results in a rotation of the impeller vanes, which push the ink against stationary vanes and out of the nozzle.
  • High mechanical advantage ⁇
  • the ratio of force to travel of the actuator can be matched to the nozzle requirements by varying the number of impeller vanes ⁇
  • Complex construction ⁇ Unsuitable for pigmented inks ⁇
  • IJ28 Acoustic lens A refractive or diffractive (e.g. zone plate) acoustic lens is used to concentrate sound waves. ⁇ No moving parts ⁇ Large area required ⁇ Only relevant for acoustic ink jets ⁇ 1993 Hadimioglu et al. EUP 550,192 ⁇ 1993 Elrod et al.
  • Simple construction ⁇ Difficult to fabricate using standard VLSI processes for a surface ejecting ink-jet ⁇ Only relevant for electrostatic ink jets ⁇ Tone-jet
  • Actuator motion Description Advantages Disadvantages: Volume expansion
  • the volume of the actuator changes, pushing the ink in all directions.
  • ⁇ Simple construction in the case of thermal ink jet ⁇ High energy is typically required to achieve volume expansion. This leads to thermal stress, cavitation, and kogation in thermal ink jet implementation ⁇ Hewlett-Packard Thermal Inkjet ⁇ Canon Bubblejet Linear, normal to chip surface
  • the actuator moves in a direction normal to the print head surface.
  • the nozzle is typically in the line of movement.
  • the effective area of the actuator becomes the membrane area ⁇ Fabrication complexity ⁇ Actuator size ⁇ Difficulty of integration in a VLSI process ⁇ 1982 Howkins USP 4,459,601 Rotary
  • the actuator causes the rotation of some element, such a grill or impeller ⁇ Rotary levers may be used to increase travel ⁇ Small chip area requirements ⁇
  • Device complexity ⁇ May have friction at a pivot point ⁇ IJ05, IJ08, IJ13, IJ28 Bend The actuator bends when energized. This may be due to differential thermal expansion, piezoelectric expansion, magnetostriction, or other form of relative dimensional change. ⁇ A very small change in dimensions can be converted to a large motion.
  • Nozzle refill method Description Advantages Disadvantages Examples Surface tension After the actuator is energized, it typically returns rapidly to its normal position. This rapld return sucks in air through the nozzle opening. The ink surface tension at the nozzle then exerts a small force restoring the meniscus to a minimum area.
  • a filter is located between the ink inlet and the nozzle chamber.
  • the filter has a multitude of small holes or slots, restricting ink flow.
  • the filter also removes particles which may block the nozzle.
  • ⁇ Additional advantage of ink filtration ⁇ Ink filter may be fabricated with no additional process steps ⁇ Restricts refill rate ⁇ May result in complex construction ⁇ IJ04, IJ12, IJ24, IJ27 ⁇ IJ29, IJ30 Small inlet compared to nozzle The ink inlet channel to the nozzle chamber has a substantially smaller cross section than that of the nozzle, resulting in easier ink egress out of the nozzle than out of the inlet. ⁇ Design simplicity ⁇ Restricts refill rate ⁇ May result in a relatively large chip area ⁇ Only partially effective ⁇ IJ02, IJ37, IJ44 Inlet shutter A secondary actuator controls the position of a shutter, closing off the ink inlet when the main actuator is energized.
  • Nozzle Clearing method Description Advantages Disadvantages Examples Normal nozzle firing All of the nozzles are fired periodically, before the ink has a chance to dry. When not in use the nozzles are sealed (capped) against air. The nozzle firing is usually performed during a special clearing cycle, after first moving the print head to a cleaning station.
  • a high nozzle clearing capability can be achieved ⁇ May be implemented at very low cost in systems which already include acoustic actuators ⁇ High implementation cost if system does not already include an acoustic actuators ⁇ IJ08, IJ13, IJ15, IJ17 ⁇ IJ18, IJ19, IJ21 Nozzle clearing plate A microfabricated plate is pushed against the nozzles. The plate has a post for every nozzle.
  • the blade is usually fabricated from a flexible polymer, e.g. rubber or synthetic elastomer.
  • ⁇ Effective for planar print head surfaces ⁇ Low cost ⁇ Difficult to use if print head surface is non-planar or very fragile ⁇ Requires mechanical parts ⁇ Blade can wear out in high volume print systems ⁇ Many ink jet systems Separate ink boiling heater A separate heater is provided at the nozzle although the normal drop e-ection mechanism does not require it. The heaters do not require individual drive circuits, as many nozzles can be cleared simultaneously, and no imaging is required.
  • ⁇ Can be effective where other nozzle clearing methods cannot be used ⁇ Can be implemented at no additional cost in some inkjet configurations ⁇ Fabrication complexity ⁇ Can be used with many IJseries ink Jets
  • Nozzle plate construction Description Advantages Disadvantages Examples Electroformed nickel A nozzle plate is separately fabricated from electroformed nickel, and bonded to the print head chip. ⁇ Fabrication simplicity ⁇ High temperatures and pressures are required to bond nozzle plate ⁇ Minimum thickness constraints ⁇ Differential thermal expansion ⁇ Hewlett Packard Thermal Inkjet Laser ablated or drilled polymer Individual nozzles holes are ablated by an intense UV laser in a nozzle plate, which is typically a polymer such as polyimide or polysulphone ⁇ No masks required ⁇ Can be quite fast ⁇ Some control over nozzle profile is possible ⁇ Equipment required is relatively low cost ⁇ Each hole must be individually formed ⁇ Special equipment required ⁇ Slow where there are many thousands of nozzles per print head ⁇ May produce thin burrs at exit holes ⁇ Canon Bubblejet ⁇ 1988 Sercel et al., SPIE, Vol.
  • Nozzle chambers are etched in the front of the wafer, and the wafer is thinned from the back side. Nozzles are then etched in the etch stop layer.
  • High accuracy ( ⁇ 1 ⁇ m) ⁇ Monolithic ⁇ Low cost ⁇ No differential expansion ⁇ Requires long etch times ⁇ Requires a support wafer ⁇ IJ03, IJ05, IJ06, IJ07 ⁇ IJ08, IJ09, IJ10, IJ13 ⁇ IJ14, IJ15, IJ16, IJ19 ⁇ IJ21, IJ23, IJ25, IJ26 No nozzle plate Various methods have been tried to eliminate the nozzles entirely, to prevent nozzle clogging.
  • Pagewidth print heads require several thousand connections to drive circuits ⁇ Cannot be manufactured in standard CMOS fabs ⁇ Complex assembly required ⁇ Epson Stylus ⁇ Tektronix hot melt piezoelectric ink jets
  • Aqueous, dye Water based ink which typically contains: water, dye, surfactant, humectant, and biocide. Modem ink dyes have high waster-fastness, light fastness ⁇ Environmentally friendly ⁇ No odor ⁇ Slow drying ⁇ Corrosive ⁇ Bleeds on paper ⁇ May strikethrough ⁇ Cockles paper ⁇ Most existing inkjets ⁇ All IJ series ink jets ⁇ Silverbrook, EP 0771 658 A2 and related patent applications Aqueous, pigment Water based ink which typically contains: water, pigment, surfactant, humectant, and biocide. Pigments have an advantage in reduced bleed, wicking and strikethrough.
  • ink jet printers A large number of new forms of ink jet printers have been developed to facilitate alternative ink jet technologies for the image processing and data distribution system. Various combinations of ink jet devices can be included in printer devices incorporated as part of the present invention.
  • the present application may utilize advanced semiconductor fabrication techniques in the construction of large arrays of ink jet printers.
  • the present application may utilize an ink delivery system to the ink jet head.
  • the present application may utilize advanced semiconductor microelectromechanical techniques in the construction of large arrays of ink jet printers.
  • the present application may include the utilization of a disposable camera system.
  • the present application may include the utilization of a data distribution system.
  • the present application may include the utilization of camera and data processing techniques such as an Artcam type device.

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

Claims (9)

  1. Appareil de buse d'impression à jet d'encre (401) comprenant :
    une chambre de buse (411) en communication fluidique avec une chambre d'encre et utilisée pour stocker de l'encre destinée à être imprimée par ledit appareil de buse (401), ladite chambre de buse (411) ayant un trou de sortie de chambre de buse (413) pour l'éjection d'encre depuis ladite chambre de buse (411) ;
    un bras de levier (417) interconnectant une tête de piston (409) et un pôle magnétique mobile (405) ; et
    une bobine d'activation (402) située à proximité dudit pôle magnétique (405), ladite bobine sur activation par un courant appliquant une force audit pôle magnétique (405) suffisante pour provoquer un mouvement de ladite tête de piston (409) d'une première position à une seconde position, ledit mouvement provoquant une éjection de l'encre à l'intérieur de ladite chambre de buse (411) depuis ladite chambre de buse à travers un trou de sortie de chambre de buse (413) sur un support d'impression.
  2. Appareil de buse d'impression à jet d'encre (401) comme revendiqué dans la revendication 1 comprenant en outre une série de moyens élastiques (416, 419) attachée audit bras de levier (417) de manière à ramener ladite tête de piston (409) à ladite première position sur désactivation de ladite bobine d'activation (402).
  3. Appareil de buse de jet d'encre (401) comme revendiqué dans la revendication 2 dans lequel lesdits moyens élastiques (416, 419) comportent au moins un ressort de torsion.
  4. Appareil de buse de jet d'encre (401) comme revendiqué dans la revendication 1 dans lequel ledit appareil est construit en utilisant des techniques de fabrication de semi-conducteurs.
  5. Appareil de buse de jet d'encre (401) comme revendiqué dans la revendication 1 dans lequel la tête de piston (409) et/ou lesdites bobines (402) sont construites à partir d'un procédé à double damasquinage.
  6. Appareil de buse d'impression à jet d'encre (401) comme revendiqué dans la revendication 1 dans lequel ledit trou de sortie de chambre de buse (413) inclut une collerette de buse adaptée pour réduire l'épandage de surface hydrophile de ladite encre.
  7. Appareil de buse d'impression à jet d'encre (401) comme revendiqué dans la revendication 1 dans lequel ladite bobine d'activation (402) est construite à partir d'un procédé de dépôt de cuivre.
  8. Appareil de buse d'impression à jet d'encre (401) comme revendiqué dans la revendication 1 dans lequel ledit pôle magnétique mobile (405) est construit à partir d'un matériau de terre rare magnétique.
  9. Appareil de buse d'impression à jet d'encre (401) comme revendiqué dans la revendication 2 dans lequel lesdits moyens élastiques sont construits à partir de nitrure de silicium.
EP04024059A 1997-07-15 1998-07-15 Imprimante à jet d'encre avec piston actionné par force magnétique Expired - Lifetime EP1512535B1 (fr)

Applications Claiming Priority (73)

Application Number Priority Date Filing Date Title
AUPO8071A AUPO807197A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ04)
AUPO8059A AUPO805997A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM14)
AUPO8044A AUPO804497A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ07)
AUPO806097 1997-07-15
AUPO803597 1997-07-15
AUPO795097 1997-07-15
AUPO8054A AUPO805497A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM05)
AUPO800197 1997-07-15
AUPO8036A AUPO803697A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ13)
AUPO8069A AUPO806997A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ11)
AUPO804897 1997-07-15
AUPO7950A AUPO795097A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM11)
AUPO806997 1997-07-15
AUPO804497 1997-07-15
AUPO805897 1997-07-15
AUPO804797 1997-07-15
AUPO8048A AUPO804897A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ14)
AUPO7949A AUPO794997A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM12)
AUPO7933A AUPO793397A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation_apparatus (IJM10)
AUPO7935A AUPO793597A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM01)
AUPO793597 1997-07-15
AUPO805397 1997-07-15
AUPO806397 1997-07-15
AUPO805997 1997-07-15
AUPO8073A AUPO807397A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM15)
AUPO807797 1997-07-15
AUPO806197 1997-07-15
AUPO8075A AUPO807597A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM17)
AUPO805697 1997-07-15
AUPO8055A AUPO805597A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM07)
AUPO807297 1997-07-15
AUPO8004A AUPO800497A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ26)
AUPO8077A AUPO807797A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM25)
AUPO8035A AUPO803597A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ06)
AUPO806597 1997-07-15
AUPO8065A AUPO806597A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM06)
AUPO8066A AUPO806697A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ01)
AUPO805497 1997-07-15
AUPO800497 1997-07-15
AUPO807697 1997-07-15
AUPO804997 1997-07-15
AUPO8001A AUPO800197A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ17)
AUPO8060A AUPO806097A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM13)
AUPO807097 1997-07-15
AUPO8041A AUPO804197A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ25)
AUPO807597 1997-07-15
AUPO807397 1997-07-15
AUPO8070A AUPO807097A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ15)
AUPO805597 1997-07-15
AUPO8076A AUPO807697A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM16)
AUPO793697 1997-07-15
AUPO807197 1997-07-15
AUPO794997 1997-07-15
AUPO793397 1997-07-15
AUPO8072A AUPO807297A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ02)
AUPO8061A AUPO806197A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM04)
AUPO803697 1997-07-15
AUPO8067A AUPO806797A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ16)
AUPO8047A AUPO804797A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ05)
AUPO7936A AUPO793697A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM02)
AUPO8049A AUPO804997A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ12)
AUPO8056A AUPO805697A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ10)
AUPO8053A AUPO805397A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM08)
AUPO804197 1997-07-15
AUPO8063A AUPO806397A0 (en) 1997-07-15 1997-07-15 Image creation method and apparatus (IJ08)
AUPO806797 1997-07-15
AUPO8058A AUPO805897A0 (en) 1997-07-15 1997-07-15 A method of manufacture of an image creation apparatus (IJM26)
AUPO806697 1997-07-15
AUPP3982A AUPP398298A0 (en) 1998-06-09 1998-06-09 A method of manufacture of an image creation apparatus (ijm45)
AUPP398298 1998-06-09
AUPP398398 1998-06-09
AUPP3983A AUPP398398A0 (en) 1998-06-09 1998-06-09 Image creation method and apparatus (ij45)
EP98933350A EP0999933B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre, actionne par un champ magnetique

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP98933350A Division EP0999933B1 (fr) 1997-07-15 1998-07-15 Buse de jet d'encre, actionne par un champ magnetique

Publications (2)

Publication Number Publication Date
EP1512535A1 EP1512535A1 (fr) 2005-03-09
EP1512535B1 true EP1512535B1 (fr) 2007-12-26

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Family Applications (11)

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

Family Applications Before (10)

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

Country Status (4)

Country Link
EP (11) EP1508444B1 (fr)
JP (6) JP4170582B2 (fr)
AT (8) ATE352421T1 (fr)
WO (1) WO1999003680A1 (fr)

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Also Published As

Publication number Publication date
EP1508444B1 (fr) 2007-11-21
EP0999933B1 (fr) 2005-03-02
JP2001510107A (ja) 2001-07-31
ATE289922T1 (de) 2005-03-15
ATE352421T1 (de) 2007-02-15
JP4185538B2 (ja) 2008-11-26
EP1510340B1 (fr) 2007-01-24
EP1510341A2 (fr) 2005-03-02
JP2007062382A (ja) 2007-03-15
EP1508443A2 (fr) 2005-02-23
ATE352420T1 (de) 2007-02-15
WO1999003680A1 (fr) 1999-01-28
EP1510340A3 (fr) 2005-03-09
JP4137965B2 (ja) 2008-08-20
EP1508445B1 (fr) 2007-01-31
ATE352423T1 (de) 2007-02-15
EP0999933A4 (fr) 2000-12-20
ATE355972T1 (de) 2007-03-15
ATE381991T1 (de) 2008-01-15
EP1508446A1 (fr) 2005-02-23
JP2007062379A (ja) 2007-03-15
EP1510340A2 (fr) 2005-03-02
EP1508446B1 (fr) 2007-01-10
EP1508445A1 (fr) 2005-02-23
EP1508444A3 (fr) 2005-03-16
EP1508443A3 (fr) 2005-03-16
EP1512535A1 (fr) 2005-03-09
JP4170582B2 (ja) 2008-10-22
ATE352422T1 (de) 2007-02-15
JP4137964B2 (ja) 2008-08-20
ATE353053T1 (de) 2007-02-15
EP1508449B1 (fr) 2007-01-24
EP1508449A1 (fr) 2005-02-23
EP1508448A1 (fr) 2005-02-23
JP4173174B2 (ja) 2008-10-29
EP1508443B1 (fr) 2007-03-07
EP1510341B1 (fr) 2007-01-24
JP4171037B2 (ja) 2008-10-22
EP1510339A3 (fr) 2005-03-09
EP1510339B1 (fr) 2007-01-24
JP2007062381A (ja) 2007-03-15
EP1508448B1 (fr) 2007-01-17
EP1510341A3 (fr) 2005-03-16
EP1508444A2 (fr) 2005-02-23
JP2007062383A (ja) 2007-03-15
EP1510339A2 (fr) 2005-03-02
JP2007062380A (ja) 2007-03-15
EP0999933A1 (fr) 2000-05-17

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