EP1013433A2 - Plaques à orifices à plusieurs pattes - Google Patents

Plaques à orifices à plusieurs pattes Download PDF

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Publication number
EP1013433A2
EP1013433A2 EP99309503A EP99309503A EP1013433A2 EP 1013433 A2 EP1013433 A2 EP 1013433A2 EP 99309503 A EP99309503 A EP 99309503A EP 99309503 A EP99309503 A EP 99309503A EP 1013433 A2 EP1013433 A2 EP 1013433A2
Authority
EP
European Patent Office
Prior art keywords
orifice plate
micro
bridge members
bridge
larger panel
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.)
Withdrawn
Application number
EP99309503A
Other languages
German (de)
English (en)
Other versions
EP1013433A3 (fr
Inventor
Brian G. Morris
Richard W. Sexton
Kenneth R. Mcwilliams
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.)
Eastman Kodak Co
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 EP1013433A2 publication Critical patent/EP1013433A2/fr
Publication of EP1013433A3 publication Critical patent/EP1013433A3/fr
Withdrawn legal-status Critical Current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
    • B41J2/1623—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
    • B41J2/162—Manufacturing of the nozzle plates

Definitions

  • the present invention relates to continuous ink jet printing and, more particularly, to multi-tabbed orifice plates used in ink droplet generation in an ink jet printer.
  • orifice plates are formed as part of a larger panel.
  • the perimeter of the orifice plate is defined by the same photolith and electroforming process use to make the orifices.
  • several contact tabs are formed to attach the orifice plate to the panel once the mandrel is removed. These tabs allow the orifice plate to be safely handled as part of the panel for cleaning, inspection and storage.
  • the tabs are about 30 mil wide and are spaced every 1-2" around the perimeter of the orifice plate.
  • orifice plates are formed as part of a larger panel, for handling purposes, but with uniformly spaced narrow bridge member connection means to reduce distortion produced when the plate is removed from the panel.
  • the orifice plate can be securely held as part of the larger panel.
  • Multiple micro-bridge elements or tabs are preferably spaced at even increments, approximately 0.050" apart.
  • These closely spaced fragile bridging members provide the necessary support for the orifice plate to facilitate handling of the orifice plate after it is removed from the mandrel. While these bridge members provide the necessary support for normal handling, they can also be broken or cut with ease at the time of bonding to the drop generator.
  • the closely spaced bridge elements are effective electrical bridges to the orifice plate. Their close spacing, which is about 1/5 the width of an orifice plate, produces the required uniform plating of the orifice plate.
  • orifice plates are formed as part of a larger panel. They are mechanically attached to the larger panel and electrically connected to it by means a large number of uniformly space narrow bridge members. These bridge members each converge to a narrow point at the edge of the orifice plate to cause the bridge to detach from the edge of the orifice plate when the orifice plate is to be removed from the larger panel at the time of orifice plate bonding.
  • Figs. 1 and 2 show how orifice plates 10 (with six orifice plates on the single panel) have been made as part of a larger panel 12, in accordance with prior art teachings.
  • the perimeter 14 of the orifice plate 10 is defined by the same photolith and electroforming process used to make the orifices.
  • several contact tabs 16 are formed to hold each orifice plate to the panel, once the mandrel is removed. These tabs act as bridging members, connecting the orifice plate to the large panel.
  • the width of each tab is approximately 0.03", while its length, the distance from the orifice plate to the frame is about 0.01".
  • Each of these bridging members is therefore relatively wide, having a width to length ratio greater than one. While these tabs 16 allow the orifice plate to be handled, several associated problems cause distortion in the orifice plate 10, which can lead to bond failures or to jet directionality problems.
  • Figs. 3 and 4 the problems associated with the prior art method for fabricating and handling orifice plates 10 can be eliminated with the present invention.
  • a large number of easily snapped micro-bridge members 18 are used between the orifice plate 10' and the larger panel.
  • Fig. 3 shows an enlarged view of one such micro-bridging member 18, within the perimeter 14 of the orifice plate.
  • the region above the border 14 corresponds to a portion of the larger panel 12, while the region below the border 14 would be a portion of the orifice plate 10.
  • the micro-bridging member 18 is comprised of two narrow beams 26. These beams should be relatively narrow, that is the width to length ratio should be much less than one.
  • each of these beams is approximately 0.0015" wide, while the length of each beam is about 0.01". If the beam is too wide, the perforation will be harder to snap, which can cause plate deformation. The region of high stress produced by a bending will extend into the plate an amount which increases with the width of the bridge. Conversely, if the beam is too narrow, the perforation may snap too easily.
  • These beams 26 converge with a 45 degree included angle 28, resulting in a triangular configuration. This shape can be used to contribute to planar stiffness of the panel when removed from the mandrel and during subsequent handling. This is particularly advantageous since the 0.0015" wide lines may be fragile, due to the small size. The triangular shape further contributes to the stiffness just as triangulation contributes to stiffness in trusses.
  • the orifice plate can be securely held as part of the larger panel.
  • the tabs are preferably spaced at even increments, approximately 0.050" apart.
  • These closely spaced fragile bridging members provide the necessary support for the orifice plate to facilitate handling of the orifice plate after it is removed from the mandrel. While these bridge members provide the necessary support for normal handling, they can also be broken or cut with ease at the time of bonding to the drop generator. Due to the fragile nature of the individual bridge members, there is minimal puckering of the thin orifice plate when the bridge elements are cut or broken.
  • the preferred configuration of the micro-bridges comprises two narrow beams which converge and join at a common apex on the orifice plate
  • the converging narrow beams could be spaced apart so that they no longer join at a common apex.
  • Such micro-bridges would still be effective in mechanically and electrically linking the orifice plate to the larger frame.
  • These micro-bridges are not as desirable as the one described earlier, since the failure of these beams to join at a common apex on the orifice plate will no longer concentrate the stresses at the edge of the orifice plate. As a result, the edge of the orifice plate may include some residual bridge members.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP99309503A 1998-12-14 1999-11-29 Plaques à orifices à plusieurs pattes Withdrawn EP1013433A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US21120598A 1998-12-14 1998-12-14
US211205 1998-12-14

Publications (2)

Publication Number Publication Date
EP1013433A2 true EP1013433A2 (fr) 2000-06-28
EP1013433A3 EP1013433A3 (fr) 2000-08-23

Family

ID=22785960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99309503A Withdrawn EP1013433A3 (fr) 1998-12-14 1999-11-29 Plaques à orifices à plusieurs pattes

Country Status (2)

Country Link
EP (1) EP1013433A3 (fr)
CA (1) CA2292093A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006091345A1 (fr) * 2005-02-18 2006-08-31 Hewlett-Packard Development Company, L.P. Imprimante a jet d'encre haute resolution
US7942997B2 (en) 2008-04-08 2011-05-17 Hewlett-Packard Development Company, L.P. High resolution inkjet printer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4972204A (en) 1989-08-21 1990-11-20 Eastman Kodak Company Laminate, electroformed ink jet orifice plate construction

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4347522A (en) * 1981-04-01 1982-08-31 The Mead Corporation Laminated metal charge plate
US5194877A (en) * 1991-05-24 1993-03-16 Hewlett-Packard Company Process for manufacturing thermal ink jet printheads having metal substrates and printheads manufactured thereby
US6183064B1 (en) * 1995-08-28 2001-02-06 Lexmark International, Inc. Method for singulating and attaching nozzle plates to printheads
US5900892A (en) * 1997-03-05 1999-05-04 Xerox Corporation Nozzle plates for ink jet cartridges
US5847725A (en) * 1997-07-28 1998-12-08 Hewlett-Packard Company Expansion relief for orifice plate of thermal ink jet print head

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4972204A (en) 1989-08-21 1990-11-20 Eastman Kodak Company Laminate, electroformed ink jet orifice plate construction

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006091345A1 (fr) * 2005-02-18 2006-08-31 Hewlett-Packard Development Company, L.P. Imprimante a jet d'encre haute resolution
US7377618B2 (en) 2005-02-18 2008-05-27 Hewlett-Packard Development Company, L.P. High resolution inkjet printer
CN101119847B (zh) * 2005-02-18 2010-09-08 惠普开发有限公司 高分辨率喷墨打印机
US7942997B2 (en) 2008-04-08 2011-05-17 Hewlett-Packard Development Company, L.P. High resolution inkjet printer

Also Published As

Publication number Publication date
EP1013433A3 (fr) 2000-08-23
CA2292093A1 (fr) 2000-06-14

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