EP0681528B1 - Düsenaufbau für einen tintenstrahldrucker - Google Patents

Düsenaufbau für einen tintenstrahldrucker Download PDF

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Publication number
EP0681528B1
EP0681528B1 EP94904720A EP94904720A EP0681528B1 EP 0681528 B1 EP0681528 B1 EP 0681528B1 EP 94904720 A EP94904720 A EP 94904720A EP 94904720 A EP94904720 A EP 94904720A EP 0681528 B1 EP0681528 B1 EP 0681528B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
shoulder
stepped bore
nozzle assembly
seal ring
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
EP94904720A
Other languages
English (en)
French (fr)
Other versions
EP0681528A1 (de
Inventor
Colin Edward Chamberlain
Ammar Lecheheb
Danny Charles Palmer
Jerzy Zaba
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.)
Domino Printing Sciences PLC
Original Assignee
Domino Printing Sciences PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Domino Printing Sciences PLC filed Critical Domino Printing Sciences PLC
Publication of EP0681528A1 publication Critical patent/EP0681528A1/de
Application granted granted Critical
Publication of EP0681528B1 publication Critical patent/EP0681528B1/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
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2/1433—Structure of nozzle plates

Definitions

  • the present invention relates to an ink jet printer nozzle assembly of the type comprising one or more nozzles mounted in a nozzle plate.
  • Nozzle assemblies of this type are well known and usually comprise a jewel nozzle in which an orifice is formed to a required shape and dimensions and a nozzle-supporting plate having a stepped bore into which the nozzle is fixed by means of adhesive. Adhesive is used in order to assure a permanent, rigid attachment of the nozzle in the nozzle plate.
  • a nozzle assembly for an ink jet printer comprising a nozzle mounted in a stepped bore in a supporting nozzle plate, the nozzle being disposed on a supporting shoulder within the stepped bore, sealed thereto by a resilient seal ring disposed between the nozzle and the shoulder, and retained therein by a crimp of the nozzle plate surface.
  • the invention also includes a method of manufacturing a nozzle assembly of this type, in which the nozzle is disposed on a supporting shoulder within the stepped bore of the nozzle plate, a resilient seal ring is provided between the shoulder and the nozzle, and the nozzle is retained within the stepped bore by crimping of the nozzle plate surface around the open end of the stepped bore.
  • the seal ring preferably comprises a seal ring which is formed of PTFE or other similar compliant material, to provide a secure seal between the underside of the nozzle and the shoulder in the stepped bore.
  • the shoulder may include a retained seal disposed, for example in an annular groove in the shoulder or the adjacent wall of the bore.
  • a PTFE seal ensures a sufficiently secure seal to avoid leakage around the nozzle in use, avoiding the need for adhesive to be used in fixing and sealing the nozzle in the nozzle plate.
  • Crimping the nozzle in position enables the problems associated with adhesive fixing to be overcome and, in particular, enables the nozzle to be accurately positioned in parallelism with the nozzle plate to ensure the precise location of the jet of ink which issues therefrom in use.
  • the nozzle may be initially held in position within the stepped bore by a cylindrical guide around which an annular crimping tool may slide, so as to be driven against the edge of the open end of the bore around the nozzle, to produce the crimp.
  • Figure 1 shows a nozzle plate 1 positioned on the base plate 2 of a crimping tool, the base plate 2 having a hardened steel locating pin 3 which locates within a bore 4 formed in the nozzle plate. Coaxial with the bore 4 is an enlarged counterbore 5 in which are positioned firstly a PTFE seal 6 and a jeweled nozzle 7 having a tapered central orifice 8.
  • Figure 1 shows the finished nozzle plate, after crimping of the jewel 7 into position in the counterbore 5 has taken place, an annular crimp 9 being shown.
  • a cylindrical guide 10 is first lowered into position on top of the jewel 7 and thereafter the annular crimping head 11 of the crimping tool is thrust downwardly around the cylindrical guide 10 into engagement with the upper surface 12 of the nozzle plate immediately around the end of the counterbore 5 in order to form the crimp.
  • PTFE seal 6 supports the jewel or nozzle in the counterbore 5 at a predefined position so that the nozzle or jewel 7 is always fixed in the same relative position within the nozzle plate, thus ensuring consistency of dimensions across different nozzle assemblies.

Landscapes

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

Claims (6)

  1. Düsenaufbau für einen Tintenstrahldrucker, wobei der Düsenaufbau eine in einer abgestuften Öffnung (4) in einer Düsen-Trägerplatte (1) angebrachte Düse umfaßt und die Düse (7) auf einer Stützschulter innerhalb der abgestuften Öffnung angeordnet ist und dort mittels einer Sicke (9) der Düsenplattenoberfläche gehalten wird, dadurch gekennzeichnet, daß die Düse gegenüber der Stützschulter mittels eines elastischen Dichtungsrings (6) abgedichtet ist, der zwischen der Düse und der Schulter angeordnet ist.
  2. Düsenaufbau nach Anspruch 1, dadurch gekennzeichnet, daß der Dichtungsring einen separaten, aus einem nachgiebigen Material ausgebildeten Dichtungsring (6) umfaßt, um eine sichere Abdichtung zwischen der Unterseite der Düse (7) und der Schulter in der abgestuften Öffnung (4) zu schaffen.
  3. Düsenaufbau nach Anspruch 2, dadurch gekennzeichnet, daß der Dichtungsring (6) aus PTFE oder einem anderen ähnlichen Material ausgebildet ist.
  4. Düsenanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Schulter eine gehalterte Abdichtung beinhaltet, die in einer ringförmigen Nut an der Schulter oder an der benachbarten Wandung der Öffnung angeordnet ist.
  5. Verfahren zum Herstellen eines Düsenaufbaus, bei dem die Düse (7) auf einer Stützschulter innerhalb einer abgestuften Öffnung (4) einer Düsenplatte (1) angeordnet wird und in der abgestuften Öffnung durch Sicken der Düsenplattenoberfläche um das offene Ende der abgestuften Öffnung herum gehaltert wird, dadurch gekennzeichnet, daß zwischen der Schulter und der Düse ein elastischer Dichtungsring vorgesehen wird.
  6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß anfänglich die Düse (7) in der abgestuften Öffnung (4) mittels einer zylindrischen Führungsvorrichtung in Position gehalten wird, entlang derer ein ringförmiges Sickenwerkzeug (11) gleiten kann, um so gegen die Kante eines offenen Endes der Öffnung um die Düse getrieben zu werden und die Sicke (9) zu erzeugen.
EP94904720A 1993-01-27 1994-01-26 Düsenaufbau für einen tintenstrahldrucker Expired - Lifetime EP0681528B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9301625 1993-01-27
GB939301625A GB9301625D0 (en) 1993-01-27 1993-01-27 Ink jet printer nozzle assembly
PCT/GB1994/000144 WO1994016899A1 (en) 1993-01-27 1994-01-26 Ink jet printer nozzle assembly

Publications (2)

Publication Number Publication Date
EP0681528A1 EP0681528A1 (de) 1995-11-15
EP0681528B1 true EP0681528B1 (de) 1997-01-02

Family

ID=10729426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94904720A Expired - Lifetime EP0681528B1 (de) 1993-01-27 1994-01-26 Düsenaufbau für einen tintenstrahldrucker

Country Status (5)

Country Link
EP (1) EP0681528B1 (de)
JP (1) JPH08506065A (de)
DE (1) DE69401338T2 (de)
GB (1) GB9301625D0 (de)
WO (1) WO1994016899A1 (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823408A (en) * 1972-11-29 1974-07-09 Ibm High performance ink jet nozzle
GB8602647D0 (en) * 1986-02-04 1986-03-12 Domino Printing Sciences Plc Ink jet droplet generator
JPS6364755A (ja) * 1986-09-08 1988-03-23 Hitachi Ltd 記録ヘツド

Also Published As

Publication number Publication date
EP0681528A1 (de) 1995-11-15
DE69401338D1 (de) 1997-02-13
WO1994016899A1 (en) 1994-08-04
JPH08506065A (ja) 1996-07-02
GB9301625D0 (en) 1993-03-17
DE69401338T2 (de) 1997-04-24

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