EP0805046A2 - Werkzeuglose Druckkopfhalterung - Google Patents

Werkzeuglose Druckkopfhalterung Download PDF

Info

Publication number
EP0805046A2
EP0805046A2 EP97302694A EP97302694A EP0805046A2 EP 0805046 A2 EP0805046 A2 EP 0805046A2 EP 97302694 A EP97302694 A EP 97302694A EP 97302694 A EP97302694 A EP 97302694A EP 0805046 A2 EP0805046 A2 EP 0805046A2
Authority
EP
European Patent Office
Prior art keywords
printhead
nest
mounting system
ink jet
latch means
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.)
Granted
Application number
EP97302694A
Other languages
English (en)
French (fr)
Other versions
EP0805046B1 (de
EP0805046A3 (de
Inventor
Bruce A. Bowling
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.)
Kodak Versamark Inc
Original Assignee
Kodak Versamark Inc
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 Kodak Versamark Inc filed Critical Kodak Versamark Inc
Publication of EP0805046A2 publication Critical patent/EP0805046A2/de
Publication of EP0805046A3 publication Critical patent/EP0805046A3/de
Application granted granted Critical
Publication of EP0805046B1 publication Critical patent/EP0805046B1/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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/34—Bodily-changeable print heads or carriages

Definitions

  • the present invention relates to continuous ink jet printers and, more particularly, to a means for installing, accurately registering, and removing a continuous ink jet printhead without the use of any tools.
  • Ink jet printing systems are known in which a print head defines one or more rows of orifices which receive an electrically conductive recording fluid, such as for instance a water base ink, from a pressurized fluid supply manifold and eject the fluid in rows of parallel streams.
  • Printers using such print heads accomplish graphic reproduction by selectively charging and deflecting the drops in each of the streams and depositing at least some of the drops on a print receiving medium, while others of the drops strike a drop catcher device.
  • Continuous ink jet printheads are one such consumable item in ink jet printing systems and must be replaced when their performance degrades. To install or replace one of these printheads, one must disconnect fluid connections that then leak, use a tool to loosen screws, and unplug an electrical connection that requires removal of a screw, which becomes a loose part. Furthermore, screws that mount and register the printhead require significant clearance around the screw body so that a connection can be made to the printing system. The realignment and registration of the printhead was a critical and tedious task, but also distasteful was the inevitable ink leakage that occurred during the uncoupling of the fluid supply and return lines to the orifice cavity. Replacement of the printhead, therefore, has been a relatively complex, messy and time consuming job, which was not at all suitable for a customer/user.
  • a printhead mounting system is used to install an ink jet printhead in a continuous ink jet printing system.
  • the mounting system comprises a printhead nest for mating with the resonator assembly of the printhead; latch means associated with the printhead nest for securing the printhead to the printhead nest when the printhead nest mates with the resonator assembly; and a snap and lock mechanism associated with fluid inlet and outlet lines and a catcher outlet line, the fluid inlet and outlet lines each having an internal check valve feature, to prevent fluid leakage.
  • the present invention provides for a user friendly design wherein a customer/user can precisely locate and mount a continuous ink jet printhead without the use of any tools.
  • a tool-less system and method for precisely installing, aligning and registering a printhead 1 in an ink jet printing system 7 is illustrated.
  • the ink jet printhead 1 is loaded into printhead nest 4, with the load direction being in the direction of arrow 13, by matching first rectangular region 8 of resonator assembly 2 with recessed rectangular region 9 of nest 4.
  • the printhead nest 4 is illustrated in exploded view in Fig. 1 as separate from the printing system 7; however, the nest 4 is actually a permanent part of the printing system 7.
  • rectangular regions 8 and 9 have just enough clearance to each other to allow proper assembly of the printhead 1 to the nest 4.
  • First rectangular area 8 at the top of the resonator assembly 2 is toleranced precisely to the resonator.
  • a snap and lock mechanism encourages catcher outlet 3C to snap and lock into its corresponding fluid port 10. This allows the installer (customer/user) to let go of the printhead 1, without losing any positioning advantage, and proceed with final seating of the printhead 1.
  • the snap and lock mechanism also provides both tactile and audible advantage to let the customer/user know that a good connection has been made.
  • latch means 5 can now be actuated.
  • a loop 11 of the latch means 5 engages with loop mating portion 12 of printhead 1.
  • Actuating the latch means 5 secures the printhead 1 to the nest, and, thereby, to the printing system 7, with approximately 40 pounds of force.
  • the customer/user exerts only a small fraction of this force because of a built-in mechanical advantage in each latch 5.
  • printhead 1 comprises a fluid inlet 3A, to allow ink into the printhead 1, and a fluid outlet 3B.
  • Fluid fittings 3A and 3B have a snap and lock mechanism like catcher outlet 3C, to snap and lock into their corresponding fluid ports (not shown).
  • the snap and lock mechanism provides both tactile and audible advantage to let the customer/user know that a good connection has been made for each fluid fitting. The user no longer has to twist fluid connections together, as required by the prior art, eliminating those instances where connections separated and ink erupted.
  • the fluid fittings of the present invention comprise internal check valve means to prevent ink leakage during installation and removal of the printhead 1.
  • an electrical connection with electrical connector 6 is achieved for the printhead 1 by joining connector board 15 with a pre-existing printed circuit board 16. Connection via line 19 is made between the connector board 15 and the printhead 1.
  • a mating aperture 14 receives spring pin 18 which is a permanent part of the printing system 7. The spring pin 18, then, is used as a restraint, rather than a screw, as in the prior art. Additionally, mating connector 17 mates with connector 6. Between the contact force of connector 6 with mating connector 17 and the spring pin 18 with aperture 14, a rigid and stable connection is made, eliminating loose screws and tools.
  • the print head assembly apparatus is useful in continuous ink jet printers.
  • the apparatus of the present invention provides for a user friendly design that allows for precise installation, alignment, and registration of a continuous ink jet printhead in a continuous ink jet printing system, by any user.
  • the printhead mount of the present invention has the further advantage of being an entirely tool-less mount, with positive location and confident fluid connections. This advantage, in turn, provides the additional advantage of eliminating a screw used in the prior art to secure the electrical connection, thereby removing all loose parts. Fluid fittings have integral check valves to stop ink from leaking, and engage a snap and lock mechanism to provide tactile and audible feedback, assuring a good connection. Keying off the resonator assembly allows for precise registration of the printhead to its nest.
  • the present invention provides the further advantage of using clamps activated by hand to secure the printhead, eliminating the need for tools.

Landscapes

  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Common Mechanisms (AREA)
EP19970302694 1996-04-30 1997-04-21 Werkzeuglose Druckkopfhalterung Expired - Lifetime EP0805046B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US64010496A 1996-04-30 1996-04-30
US640104 1996-04-30

Publications (3)

Publication Number Publication Date
EP0805046A2 true EP0805046A2 (de) 1997-11-05
EP0805046A3 EP0805046A3 (de) 1998-06-03
EP0805046B1 EP0805046B1 (de) 2001-10-10

Family

ID=24566864

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970302694 Expired - Lifetime EP0805046B1 (de) 1996-04-30 1997-04-21 Werkzeuglose Druckkopfhalterung

Country Status (5)

Country Link
EP (1) EP0805046B1 (de)
JP (1) JPH1034907A (de)
AU (1) AU714036B2 (de)
CA (1) CA2203847A1 (de)
DE (1) DE69707192T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10071578B2 (en) 2014-09-22 2018-09-11 Hewlett-Packard Development Company, L.P. Mounting device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010027071A1 (de) 2010-07-13 2012-01-19 Voxeljet Technology Gmbh Vorrichtung zum Herstellen dreidimensionaler Modelle mittels Schichtauftragstechnik
CN114701262B (zh) * 2022-03-03 2024-02-27 芯体素(杭州)科技发展有限公司 用于非平整基材面的多独立喷头打印设备及其打印方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4130752A (en) * 1973-10-23 1978-12-19 Ing. C. Olivetti & C., S.P.A. Electrothermal print head
JPS55158971A (en) * 1979-05-29 1980-12-10 Canon Inc Detachable mechanism for printing head
US4811035A (en) * 1988-03-14 1989-03-07 Eastman Kodak Company Modular two-color fluid system for continuous ink jet printer
US4809015A (en) * 1988-03-14 1989-02-28 Eastman Kodak Company Continuous ink jet printer having modular print head assembly
US5109239A (en) * 1989-01-31 1992-04-28 Hewlett-Packard Company Inter pen offset determination and compensation in multi-pen ink jet printing systems
EP0479270B1 (de) * 1990-10-03 1996-05-22 Canon Kabushiki Kaisha Aufzeichnungsgerät

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10071578B2 (en) 2014-09-22 2018-09-11 Hewlett-Packard Development Company, L.P. Mounting device

Also Published As

Publication number Publication date
JPH1034907A (ja) 1998-02-10
DE69707192D1 (de) 2001-11-15
EP0805046B1 (de) 2001-10-10
AU1993397A (en) 1997-11-06
CA2203847A1 (en) 1997-10-30
DE69707192T2 (de) 2002-11-07
EP0805046A3 (de) 1998-06-03
AU714036B2 (en) 1999-12-16

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