EP0869002B1 - Tintenstrahldruckkopf, Verfahren zu seiner Herstellung, und Tintenstrahlaufzeichnungsgerät - Google Patents

Tintenstrahldruckkopf, Verfahren zu seiner Herstellung, und Tintenstrahlaufzeichnungsgerät Download PDF

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Publication number
EP0869002B1
EP0869002B1 EP19980302461 EP98302461A EP0869002B1 EP 0869002 B1 EP0869002 B1 EP 0869002B1 EP 19980302461 EP19980302461 EP 19980302461 EP 98302461 A EP98302461 A EP 98302461A EP 0869002 B1 EP0869002 B1 EP 0869002B1
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EP
European Patent Office
Prior art keywords
channels
liquid
ink
channel
head
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
EP19980302461
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English (en)
French (fr)
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EP0869002A1 (de
Inventor
Hiroyuki Ishikawa
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.)
Brother Industries Ltd
Original Assignee
Brother Industries Ltd
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Filing date
Publication date
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Publication of EP0869002A1 publication Critical patent/EP0869002A1/de
Application granted granted Critical
Publication of EP0869002B1 publication Critical patent/EP0869002B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/16—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
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2/14201—Structure of print heads with piezoelectric elements
    • B41J2/14209—Structure of print heads with piezoelectric elements of finger type, chamber walls consisting integrally of piezoelectric material
    • 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
    • B41J2/1607—Production of print heads with piezoelectric elements
    • B41J2/1609—Production of print heads with piezoelectric elements of finger type, chamber walls consisting integrally of piezoelectric material
    • 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
    • B41J2/1632—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
    • B41J2/164—Manufacturing processes thin film formation
    • B41J2/1642—Manufacturing processes thin film formation thin film formation by CVD [chemical vapor deposition]

Definitions

  • the present invention relates to an ink jet head for ejecting ink through nozzles by exerting pressure on ink in ink channels formed in the ink jet head, and an ink jet recorder using the ink jet head, and a method for manufacturing the ink jet head.
  • a communication device such as a facsimile machine or an information processor such as a personal computer usually has a recorder capable of recording data, comprising characters or graphics, onto a sheet of paper so as to store this data as visual information.
  • the recorder adopts a printing system such as impact system, thermal system or ink jet system.
  • a printing system such as impact system, thermal system or ink jet system.
  • the above-described ink jet recorder has an ink jet head with numerous nozzles for ejecting ink droplets toward a sheet of paper so as to print characters or graphics thereon.
  • An ink jet head may have a structure as illustrated in Figs. 13 to 15.
  • a plate member 103 is bonded to an actuator base plate 100 to alternately form ejection channels (ink channels) 111, and dummy channels (blank channels) 110 which accommodate no ink and do not eject ink.
  • a nozzle plate 107 having nozzles 106 formed in correspondence with the respective ejection channels 111 is bonded to an end face of the actuator base plate 100.
  • a shielding plate 109 having channel holes 108 formed in correspondence with the ejection channels 111 is bonded to the other end face of the actuator base plate 100.
  • the dummy channels 110 are spatially separated from an ink supply path 112, and the ink supply path 112 is caused to communicate only with the ejection channels 111.
  • Side walls 101 between the ejection channels 111 and the dummy channels 110 are each constituted of a polarized piezoelectric material, and an electrode 102 is formed on the surface of each side wall.
  • a drive electric field is applied to the side wall 101 via the electrode 102 to bend the side wall 101 and change the capacity of the ink chamber 110. The resulting increase and decrease in the ink pressure cause the ink to be discharged (ejected) from and supplied to the ejection channel 111.
  • the side walls 101 are bent to increase or decrease the capacity of the ejection channel 111 so that ink droplets will be ejected from a predetermined ejection channel 111.
  • the adjacent dummy channel 110 increases or decreases in capacity.
  • this dummy channel 110 is separated from the ink supply path 112 by the shielding plate 109 to be kept free from ink.
  • the ink pressure in the adjacent ejection channel 111 is not affected by the capacity change of the dummy channel 110. Consequently, ink droplets can be ejected at the desired ink pressure.
  • EP 0 595 654 A2 shows a liquid ejection head according to the preamble of claim 1, in particular with Figure 9 this document shows a stopper 96 for keeping empty the dummy channels.
  • a first aspect of the present invention provides a liquid ejection head having a plurality of nozzles for ejecting a liquid and a liquid supply port through which the liquid is supplied, the liquid ejection head comprising:
  • the liquid ejection head of the present invention there is no need to use the shielding plate employed in the ink jet head shown in Figs. 13 to 15, so that the number of the constituent parts of the head can be reduced. Moreover, the sealing of the blank channels, namely, dummy channels, can be achieved by the blockage of the blank channels. Thus, the reliability of sealing is enhanced compared with the adhesion of the shielding plate to the opening portions of the blank channels.
  • the liquid channels may be formed so as to pass straight through the head body.
  • the liquid channel may be curved upwardly midway, without passing through the head body, to communicate with the liquid supply port.
  • the blank channels each have the rear end thereof blocked inside the head body by leaving the rear end intact.
  • the liquid ejection head of the present invention may further include a nozzle plate having the nozzles formed therein, a member having the liquid supply port formed therein, and a cover plate for covering channel opening portions open along the lengthwise direction of the liquid channels and the blank channels.
  • the bottom of the blank channel comes into contact with the cover plate at or adjacent to one end of the blank channel, whereby the one end of the blank channel can be blocked inside the head body.
  • the side wall may be constituted by laminating piezoelectric layers polarized in reverse directions.
  • the liquid ejection head of the present invention may be a liquid ejection head formed by a method including the steps of:
  • a second aspect of the present invention provides an ink jet recorder comprising:
  • the constitution of the ink jet head is so simple that the recorder can be produced at a low cost. Furthermore, the blank channels of the ink jet head can be sealed without fail, so that the recorder can be a highly reliable product.
  • a third aspect of the present invention provides a method for producing an ink jet head having a plurality of ink channels and blank channels formed in a head body, the method comprising the steps of:
  • the plate material is cut so that the resulting channels will completely cross (pass through) the head body if the channels serve as ink channels.
  • the plate material is cut, beginning at one end thereof, but its cutting is stopped before the cut area extends to the other end, whereby one of the ends of the channel is blocked.
  • blank channels and ink channels can be formed in another plate material made of a piezoelectric material by the step of forming a plurality of channels parallel and at predetermined spacing; and the plate material and the other plate material can be positioned such that the ink channels of the plate material and the ink channels of the other plate material are not opposed to each other, and the plate material and the other plate material can be bonded together via the cover plate such that lengthwise open portions of the ink channels of the plate material and the other plate material are covered with the cover plate.
  • An ink jet head related to the embodiment of the invention has a first actuator base plate 2U, a second actuator base plate 2L, a plate member 4, a nozzle plate 6, and a manifold member 7.
  • Both actuator base plates 2U, 2L are each formed of a piezoelectric material comprising a lead zirconate titanate (PZT) based ceramic material.
  • PZT lead zirconate titanate
  • On one surface of each actuator base plate a plurality of two kinds of channels, i.e., first and second channels 14 and 15, formed by cutting with a diamond blade or the like are alternately provided.
  • a lead titanate (PT) based ceramic material may be used as the piezoelectric material.
  • This surface 14a is formed with a first depth H1 in a region ranging from the rear end (right end in the drawing) to an intermediate portion near the front end (left end in the drawing) of the first or second actuator base plate 2U or 2L. Then, the surface 14a is formed to become shallower from the intermediate portion toward the front end, and have a second depth H2 at the front end 14b.
  • first channels 14 and second channels 15, as shown in Fig. 1, are arranged alternately with side walls 20 therebetween.
  • the side wall 20, as illustrated in Fig. 3, is formed of a plurality of (e.g., two) layers of a piezoelectric material that have been laminated in the depth direction of the channel 14 or 15.
  • the side wall 20 is polarized in a direction perpendicular to the direction of arrangement, and the longitudinal direction of, these channels 14 and 15, and the respective layers of the side wall 20 are polarized in reverse directions 27U, 27L to each other.
  • electrodes 22 are formed by vacuum deposition or plating. The electrodes 22 apply an electric field in a direction perpendicular to the reverse directions 27U and 27L, thereby bending the polarized side wall 20 as shown in Fig.3.
  • the first and second actuator base plates 2U and 2L constituted as described above are disposed such that their first channels 14 are not opposed to each other, for example, that the first channel 14 is opposed to the second channel 15 as shown in Fig.3.
  • the flat plate-shaped plate member 4 comprising a ceramic material or a resin material is provided.
  • the plate member 4 is adhered to the aforementioned one surface of the actuator base plates 2U, 2L in a liquid-tight condition by means of an epoxy resin adhesive 24.
  • the first channel 14 of the first and second actuator base plates 2U and 2L as shown in Fig.
  • ejection channel 10 which serves as an ink (liquid) channel with its front end and rear end open.
  • the second channel 15 is also covered with the plate member 4 to form a dummy (blank) channel 11 with its front end open and with its rear end 15b being sealed by the contact of the one surface of the actuator base plates 2U, 2L with the plate member 4.
  • the nozzle plate 6 is bonded using the above-mentioned epoxy resin adhesive.
  • the nozzle plate 6 is formed from a plastic material such as polyalkylene (e.g., polyethylene) terephthalate, polyimide, polyether imide, polyether ketone, polyether sulfone, polycarbonate or cellulose acetate.
  • nozzles 30 are arranged in a staggered manner, as shown in Fig. 1, in agreement with the ejection channels 10 arranged alternately in two rows, i.e., upper and lower rows.
  • the nozzle 30, as shown in Fig. 2 is in a nearly truncated conical shape. Its bore increases from the exit side toward the ejection channel 10 side, reaching nearly the maximum diameter that can be set for the channel cross section of the ejection channel 10, at the end face of the ejection channel 10.
  • the ejection channel 10 which the nozzle 30 communicates with is desirably constituted as follows:
  • the ratio of the second depth H2 of the ejection channel 10 at the end beside the nozzle 30 to the first depth H1 of the ejection channel 10 at a position distant from the nozzle 30, i.e. a position at which the bottom of the ejection channel 10 is plane, is set to be in the range of from 0.1 to 0.8. This is to ensure that air bubbles can be fully removed through the nozzle 30 by a decreased number of treatments for closely contacting a suction device with the outside of the nozzle 30 and sucking ink in the ejection channel 10 under negative pressure.
  • the channel cross section beside the front end 14b of the ejection channel 10 is desirably constituted as follows:
  • the ratio of the distance between the side walls 20 to the height of the side wall 20 is set to be in the range of from 0.5 to 2.0 so that the removal of air bubbles can be performed even more satisfactorily.
  • the manifold member 7 is bonded to the rear ends of the first and second actuator base plates 2U and 2L and the plate member 4, the manifold member 7 is bonded.
  • an ink supply port 31 is formed for the supply of ink from an ink tank (not shown).
  • the manifold member 7 forms an ink supply path 9 communicating with all of the ejection channels 10. When the ejection channel 10 increases in capacity, the manifold member 7 feeds ink to the expanded ejection channel 10.
  • a specific ejection channel is selected in accordance with print data given.
  • electrodes 22A and 22D of dummy channels 11A and 11C located on both sides of the selected ejection channel 10B a drive voltage is produced.
  • electrodes 22B and 22C of the ejection channel 10B are grounded to have a GND potential.
  • the respective layers of the polarized side walls 20A and 20B on both sides of the ejection channel 10B deform in reverse directions because of a piezoelectric thickness shear effect, so that the side walls 20A and 20B bend so as to widen outward at the center.
  • the ink pressure in the ejection channel 10B decreases.
  • ink in the ink supply path 9 is fed into the ejection channel 10B.
  • the drive voltage for the electrodes 22A and 22D is removed with a predetermined timing with respect to the supplied ink in the ejection channel 10B, whereupon the side walls 20A, 20B return to their original straight form.
  • the ink in the ejection channel 10B is pressurized at a high pressure, whereby an ink droplet is ejected from the nozzle 30.
  • an ink droplet may be ejected by bending the side walls 20A, 20B so as to approach each other, and ink may be supplied from the ink supply path 9 into the ejection channel 10B by restoring the side plates 20A, 20B to the straight form. It is also permissible to combine these bending actions in a plurality of ways, thereby stabilizing the ejection of ink droplets or varying the operating characteristics of ink droplets.
  • the above manner of printing varies the capacity of the dummy channels 11A, 11C, because the side walls 20A, 20B are shared between the ejection channel 10B and the dummy channels 11A, 11C adjacent to the ejection channel 10B.
  • the dummy channels 11A, 11C as shown in Fig. 2, have the rear end thereof sealed by the contact of one surface of the actuator base plate 2L with the plate member 4.
  • the dummy channel is separated spatially from the ink supply path 9 and no ink is present there.
  • the capacity of the dummy channels 11A, 11C changes, therefore, this change in capacity does not affect the ink pressure of the ejection channel 10B via the ink supply path 9.
  • printing is carried out with ink droplets in a stable amount of ejection.
  • the sealed portion at the rear end of the dummy channel is not very large.
  • the ink jet head according to the instant embodiment is constituted such that a plurality of channels are formed in the first and second actuator base plates 2U, 2L; of these plural channels, the channels constituting ink channels for ejection of ink are the ejection channels 10; the channels adjacent to the ejection channels via the side walls 20 are the dummy channels 11 which do not accommodate ink; and at the rear end (one end) of the first and second actuator base plates 2U, 2L, the ink supply path 9 is connected for opening the same-side end of the plurality of ejection channels 10 and supplying ink to the plurality of ejection channels 10, whereby the dummy channel 11 does not reach the rear end (one end).
  • the side walls 20 are polarized in a direction perpendicular to the direction of arrangement of, and the longitudinal direction of, the plurality of channels 10, 11, and a voltage is applied to the electrodes 22 provided along the side wall 20, whereby the adjacent ejection channel 10 and the adjacent dummy channels 11 can be deformed so that their capacities will be changed.
  • the application of voltage to the electrodes 22 thus deforms the adjacent ejection channel and dummy channels in directions in which their capacities are varied.
  • ink is absent in the dummy channels 11 sealed with respect to the ink supply path 9.
  • ink can be ejected from the predetermined ejection channel, with no influence exerted on the other ejection channels 10.
  • the ejection channels 10 and the dummy channels 11 are alternately arranged, and both side walls 20 of the ejection channel are deformable.
  • both side walls 20 of a specific ejection channel are deformed, a great change in capacity is caused to the predetermined ejection channel with the other ejection channels being unaffected, since the ejection channels and the dummy channels are alternately arranged. Consequently, ink can be ejected efficiently.
  • the plate member 4 is bonded to the first and second actuator base plates 2U and 2L so as to cover the open surface (one surface) in the longitudinal direction of the first channels 14 and second channels 15 corresponding to the plurality of channels.
  • the plate member 4 is bonded to the first and second actuator base plates 2U and 2L, the vicinity of one end 15b of the second channel 15 contacts the plate member 4, thus reliably sealing the dummy channel 11 relative to the ink supply path 9.
  • a pair of first and second actuator base plates 2U and 2L alternately having the ejection channels 10 and dummy channels 11 are arranged such that the ejection channels 10 of the first actuator base plate 2U are opposed to the dummy channels 11 of the second actuator base plate 2L, and the plate member 4 is bonded to and disposed between the pair of first and second actuator base plates 2U and 2L so as to cover the open surface in the longitudinal direction of each channel. Since the ejection channels 10 are so alternately arranged in two rows, upper row and lower row, by both actuator base plates 2U and 2L, high density recording becomes possible.
  • the ink jet head according to the instant embodiment has the first and second actuator base plates 2U and 2L bonded together via the plate member 4, thus having channels comprising the ejection channels 10 and dummy channels 11 in two rows, upper row and lower row.
  • the ink jet head is not restricted to this constitution. That is, the ink jet head, as shown in Figs. 4 to 6, may be constituted such that a plate member 4 is bonded to one surface of one actuator base plate 2 via an adhesive layer 24, whereby channels comprising ejection channels 10 and dummy channels 11 are provided in one row.
  • the side wall 20 is formed of one layer of a piezoelectric material polarized in only one direction, and an electrode 22 is formed only in an upper half of the side wall 20.
  • the ink jet head may also be constituted as follows: To an actuator base plate 2 polarized in a direction 27L, a piezoelectric member 25 polarized in the direction 27U opposite to the direction 27L is bonded via an adhesive layer 26. Then, the piezoelectric member 25 and the actuator base plate 2 are cut to form first channels 14 and second channels 15. Electrodes 22L and 22U are formed on a side wall 20 comprising the piezoelectric member 25 and the actuator base plate 2 to give the side wall 20 two layers polarized in reverse directions 27U and 27L.
  • the ink jet head is configured to comprise a plurality of layers polarized in reverse directions, a plurality of channels formed along the plurality of layers, and the plate member 4 bonded to the actuator base plate 2 so as to cover the open surface in the longitudinal direction of the plurality of channels.
  • the plurality of layers deform in reverse directions in the same manner as in Fig. 3. This causes a marked change in capacity to the ejection channel, whereby ink can be ejected efficiently.
  • the ink jet head may also be constituted as follows: First and second actuator base plates 2U, 2L having electrodes 22U, 22L formed on side walls 20U, 20L of first channels 14U, 14L and second channels 15U, 15L are vertically bonded together as a pair. As a result, ejection channels 10 and dummy channels 11 are defined by the side walls 20U, 20L polarized in one direction 27U and in another direction 27L. In this manner, the pair of first and second actuator base plates 2U, 2L having a plurality of channels are bonded together so that the open surfaces in the longitudinal direction of the channels of the base plates 2U, 2L are opposed to the others. This brings the vicinity of one end 15b of the second channel 15 of the dummy channels into contact with the vicinity of the counterpart. Thus, the dummy channel 11 can be reliably sealed with respect to the ink supply path 9.
  • the ink jet head of the present invention that has been described is useful for an ink jet recorder such as ink jet printer and facsimile.
  • the ink jet printer usually has the ink jet head, an ink supply device such as an ink cartridge for feeding ink to the ink jet head, and a carriage for holding the ink jet head and moving it along and over a recording medium such as printing paper. Thereby, the ink jet printer ejects the ink from the ink jet head onto a certain printing place on the recording medium.
  • An example of the ink jet printer to which the present invention can be applied is disclosed in the United States Patent No. 5,639,220.
  • the rear end of the dummy channel is not cut, but left intact for use as a sealed portion.
  • the present invention has been described with an ink jet head for use in an ink jet printer being taken as the example.
  • the invention may be applied to not only ink jet printer, but any types of recorder such as a facsimile using an inkjet head.
  • the invention is not restricted thereto, and may be applied, for example, to any types of apparatus for ejecting molten solder, or a decorative liquid for foods and cosmetics.

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

Claims (17)

  1. Flüssigkeitsausstoßkopf mit einer Mehrzahl von Düsen (30) zum Ausstoßen einer Flüssigkeit und einer Flüssigkeitslieferöffnung (31), durch die die Flüssigkeit geliefert werden kann, wobei der Flüssigkeitsausstoßkopf aufweist: einen Kopfkörper;
    eine Mehrzahl von Flüssigkeitskanälen (10), von denen jeder innerhalb des Kopfkörpers so gebildet ist, daß er an einem Ende davon mit einer Düse (30) in Verbindung steht und an dem anderen, d.h. dem hinteren Ende davon mit der Flüssigkeitslieferöffnung (31) in Verbindung steht, wobei jeder Flüssigkeitskanal (10) die Flüssigkeit durch eine der Düsen ausstoßen kann, wenn mindestens eine der Seitenwände (20) des Flüssigkeitskanales verformt wird; und eine Mehrzahl von Leerkanälen (11), von denen jeder innerhalb des Kopfkörpers so gebildet ist, daß er über die Seitenwand (20) benachbart zu dem Tintenkanal (10) ist, wobei das Innere eines jeden Leerkanales (11) ein hinteres Ende aufweist, das innerhalb des Kopfkörpers blockiert ist, so daß der Leerkanal und die Flüssigkeitslieferöffnung nicht miteinander in Verbindung stehen; dadurch gekennzeichnet,
    daß das hintere Ende des Leerkanales unversehrt gelassen wird zur Benutzung als abgedichteter Abschnitt zum Blockieren des hinteren Endes innerhalb des Kopfkörpers.
  2. Flüssigkeitsausstoßkopf nach Anspruch 1,
    bei dem der Flüssigkeitskanal (10) so gebildet ist, daß er gerade durch den Kopfkörper geht.
  3. Flüssigkeitsausstoßkopf nach Anspruch 1 oder 2, bei dem die Seitenwand (20) aus einem piezoelektrischen Element gebildet ist.
  4. Flüssigkeitsausstoßkopf nach Anspruch 3, der eine Elektrode (22) auf der Seitenwand gebildet aufweist und bei dem die Seitenwand in eine Richtung senkrecht zu der Richtung der Anordnung der Mehrzahl von Kanälen und zu der Längsrichtung der Mehrzahl von Kanälen polarisiert ist, so daß eine Spannung an die Elektrode zum Verformen des Flüssigkeitskanales (10) angelegt werden kann.
  5. Flüssigkeitsausstoßkopf nach einem der vorhergehenden Ansprüche, bei dem die Flüssigkeitskanäle (10) und die Leerkanäle (11) abwechselnd angeordnet sind.
  6. Flüssigkeitsausstoßkopf nach einem der vorhergehenden Ansprüche, bei dem die Seitenwand (20) durch laminierte piezoelektrische Schichten aufgebaut ist, die in entgegengesetzte Richtungen polarisiert sind.
  7. Flüssigkeitsausstoßkopf nach einem der vorhergehenden Ansprüche, bei dem der Kopfkörper einen Satz von Kopfteilen aufweist, von denen jedes eine Mehrzahl von Flüssigkeitskanälen (10) aufweist, und die Kopfteile miteinander derart verbunden sind, daß ihre entsprechenden Flüssigkeitskanäle einander gegenüber sind.
  8. Flüssigkeitsausstoßkopf nach einem der Ansprüche 1 bis 6, bei dem der Kopfkörper einen Satz von Kopfteilen aufweist, von denen jedes eine Mehrzahl von Flüssigkeitskanälen (10) aufweist, die Kopfteile so positioniert sind, daß ihre entsprechenden Flüssigkeitskanäle einander nicht gegenüber sind, und die Kopfteile miteinander über eine Abdeckplatte verbunden sind, die offene Abschnitte der entsprechenden Flüssigkeitskanäle in Längsweise abdeckt.
  9. Flüssigkeitsausstoßkopf nach einem der vorhergehenden Ansprüche, weiter mit einer Düsenplatte (6) mit darin gebildeten Düsen (30), einem Teil mit einer darin gebildeten Flüssigkeitslieferöffnung (31) und einer Abdeckplatte (4) zum Abdecken der offenen Kanalabschnitte, die entlang der Längsrichtung der Flüssigkeitskanäle und der Leerkanäle offen sind.
  10. Flüssigkeitsausstoßkopf nach Anspruch 9, bei dem das hintere Ende des Leerkanales, das unversehrt gelassen ist, in Kontakt mit der Abdeckplatte (4) kommt, wodurch das hintere Ende des Leerkanales innerhalb des Kopfkörpers blockiert ist.
  11. Flüssigkeitsausstoßkopf nach einem der Ansprüche 1 bis 8, weiter mit einer Düsenplatte (6) mit den darin gebildeten Düsen (30) und einer Abdeckplatte (4) zum Abdecken der offenen Kanalabschnitte, die offen entlang der Längsrichtung der Flüssigkeitskanäle und der Leerkanäle sind, wobei die Abdeckplatte (4) die Flüssigkeitslieferöffnung darin gebildet aufweist.
  12. Flüssigkeitsausstoßkopf nach Anspruch 9 oder 10, der durch das Verfahren gebildet ist, das die Schritte aufweist:
    Bilden einer Mehrzahl von Kanälen parallel und in einem vorbestimmten Abstand in einer Richtung eines Plattenmateriales, das aus einem piezoelektrischen Material hergestellt ist, derart, daß einer der benachbarten Kanäle an dem hinteren Ende davon durch Unversehrtlassen des hinteren Endes zum Bilden eines Leerkanales (11) blockiert wird, während der andere Kanal an beiden Enden davon offen ist, so daß er einen Flüssigkeitskanal (10) bildet, wodurch ein Kopfkörper erzeugt wird;
    Befestigen der Düsenplatte (6) mit darin gebildeten Düsen an dem Kopfkörper so, daß eine Verbindung zwischen den Düsen (30) und einem Ende eines jeden der Flüssigkeitskanäle hergestellt wird;
    Befestigen des Teiles mit einer darin gebildeten Flüssigkeitslieferöffnung (31) an dem Kopfkörper so, daß eine Verbindung zwischen der Flüssigkeitslieferöffnung und dem anderen Ende eines jeden der Flüssigkeitskanäle hergestellt wird; und
    Befestigen der Abdeckplatte (4) an dem Kopfkörper so, daß die Mehrzahl von Flüssigkeitskanälen und der Leerkanäle, die in dem Kopfkörper gebildet werden, in der Längsrichtung abgedeckt werden.
  13. Tintenstrahlaufzeichnungsgerät mit:
    einem Tintenstrahlkopf mit einem Tintenausstoßkopf nach einem der vorangehenden Ansprüche und
    einer Tintenliefervorrichtung, die mit dem Tintenstrahlkopf zum Liefern der Tinte dahin verbunden ist;
    worin die Düsen (30) zum Ausstoßen von Tinte auf ein Aufzeichnungsmedium dienen und die Flüssigkeitslieferöffnung (31) eine Tintenlieferöffnung ist, durch die Tinte geliefert wird.
  14. Tintenstrahlaufzeichnungsgerät nach Anspruch 13, mit einem Tintenstrahlkopf, der durch ein Verfahren gebildet wird, das die Schritte aufweist:
    Bilden einer Mehrzahl von Kanälen parallel und in einem vorbestimmten Abstand in einer Richtung eines Plattenmateriales, das aus einem piezoelektrischen Material gemacht ist, derart, daß einer der benachbarten Kanäle an dem hinteren Ende davon durch Unversehrtlassen des hinteren Endes zum Bilden eines Leerkanales (11) blockiert wird, während der andere Kanal an beiden Enden davon offen ist zum Bilden eines Tintenkanales (10), wodurch ein Kopfkörper gebildet wird;
    Befestigen der Düsenplatte (6) mit darin gebildeten Düsen an dem Plattenmaterial so, daß eine Verbindung zwischen der Düse (30) und einem Ende eines jeden Tintenkanales hergestellt wird;
    Befestigen des Teiles mit einer darin gebildeten Tintenlieferöffnung (31) an dem Plattenmaterial so, daß eine Verbindung zwischen der Tintenlieferöffnung und dem anderen Ende eines jeden Tintenkanales hergestellt wird; und
    Befestigen der Abdeckplatte (4) an dem Plattenmaterial so, daß die Mehrzahl von Tintenkanälen und die Leerkanäle, die gebildet sind, in der Längsrichtung abgedeckt werden.
  15. Verfahren zum Herstellen eines Tintenstrahlkopfes mit einer Mehrzahl von Tintenkanälen (10) und Leerkanälen (11), die in einem Kopfkörper gebildet sind, wobei das Verfahren die Schritte aufweist:
    Bilden einer Mehrzahl von Kanälen parallel und in einem vorbestimmten Abstand in einer Richtung eines Plattenmateriales, das aus einem piezoelektrischen Material gemacht ist, und derart, daß einer der benachbarten Kanäle an dem hinteren Ende davon durch Unversehrtlassen des hinteren Endes blockiert wird zum Bilden eines Leerkanales (11), während der andere Kanal an beiden Enden offen ist, wodurch ein Tintenkanal (10) gebildet wird;
    Befestigen einer Düsenplatte (6) mit darin gebildeten Düsen an dem Plattenmaterial so, daß eine Verbindung zwischen der Düse (30) und einem Ende eines jeden Tintenkanales hergestellt wird;
    Befestigen eines Teiles mit einer darin gebildeten Tintenlieferöffnung (31) an dem Plattenmaterial so, daß eine Verbindung zwischen der Tintenlieferöffnung (31) und dem anderen, d.h. hinterem Ende eines jeden Tintenkanales hergestellt wird; und
    Befestigen einer Abdeckplatte (4) an dem Plattenmaterial derart, daß die Mehrzahl von Tintenkanälen (10) und der Leerkanäle (11), die gebildet sind, in der Längsrichtung abgedeckt werden.
  16. Verfahren nach Anspruch 15, bei dem die Mehrzahl von Tintenkanälen (10) und Leerkanälen (11) unter Benutzung eines Schneider gebildet werden.
  17. Verfahren nach Anspruch 15 oder 16, bei dem die Leerkanäle (11) und die Tintenkanäle (10) in einem anderen Plattenmaterial gebildet werden, das aus einem piezoelektrischen Material hergestellt ist, durch den Schritt des Bildens einer Mehrzahl von Kanälen parallel und in einem vorbestimmten Abstand und
    das Plattenmaterial und das andere Plattenmaterial derart positioniert werden, daß ihre entsprechenden Tintenkanäle einander nicht gegenüberliegen, und das Plattenmaterial und das andere Plattenmaterial miteinander über die Abdeckplatte (4) derart verbunden werden, daß die offenen Abschnitte in Längsrichtung ihrer entsprechenden Tintenkanäle mit der Abdeckplatte abgedeckt werden.
EP19980302461 1997-03-31 1998-03-30 Tintenstrahldruckkopf, Verfahren zu seiner Herstellung, und Tintenstrahlaufzeichnungsgerät Expired - Lifetime EP0869002B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP80153/97 1997-03-31
JP8015397A JPH10272771A (ja) 1997-03-31 1997-03-31 インクジェットヘッド
JP8015397 1997-03-31

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Publication Number Publication Date
EP0869002A1 EP0869002A1 (de) 1998-10-07
EP0869002B1 true EP0869002B1 (de) 2001-02-28

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6601948B1 (en) * 2002-01-18 2003-08-05 Illinois Tool Works, Inc. Fluid ejecting device with drop volume modulation capabilities
GB0322590D0 (en) * 2003-09-26 2003-10-29 Xaar Technology Ltd Droplet deposition apparatus
WO2016098625A1 (ja) * 2014-12-17 2016-06-23 コニカミノルタ株式会社 インクジェットヘッド、インクジェット記録装置、及びインクジェットヘッドの製造方法
GB2594471B (en) * 2020-04-27 2022-12-21 Xaar Technology Ltd An actuator component for a droplet ejection head and method for manufacturing the same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5432540A (en) * 1992-02-25 1995-07-11 Citizen Watch Co., Ltd. Ink jet head
EP0595654A3 (en) * 1992-10-30 1997-07-23 Citizen Watch Co Ltd Ink jet head
US5650810A (en) 1992-12-03 1997-07-22 Brother Kogyo Kabushiki Kaisha Ink jet print head having a manifold wall portion and method of producing the same by injection molding
US5646661A (en) * 1993-11-11 1997-07-08 Brother Kogyo Kabushiki Kaisha Ink ejecting device having alternating ejecting channels and non-ejecting channels
JP3163878B2 (ja) * 1993-11-11 2001-05-08 ブラザー工業株式会社 インク噴射装置
JP3129099B2 (ja) 1994-09-09 2001-01-29 ブラザー工業株式会社 駆動装置付ポンプ
JP3147680B2 (ja) * 1994-10-18 2001-03-19 ブラザー工業株式会社 インク噴射装置およびその製造方法
JPH08187846A (ja) * 1995-01-09 1996-07-23 Brother Ind Ltd インクジェット記録装置
JP3166530B2 (ja) * 1995-01-30 2001-05-14 ブラザー工業株式会社 インク噴射装置

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EP0869002A1 (de) 1998-10-07
DE69800538D1 (de) 2001-04-05
JPH10272771A (ja) 1998-10-13
DE69800538T2 (de) 2001-06-13

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