EP0997285A1 - Vorrichtung zum Ausrichten von Tintenstrahldüsen - Google Patents

Vorrichtung zum Ausrichten von Tintenstrahldüsen Download PDF

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Publication number
EP0997285A1
EP0997285A1 EP98250381A EP98250381A EP0997285A1 EP 0997285 A1 EP0997285 A1 EP 0997285A1 EP 98250381 A EP98250381 A EP 98250381A EP 98250381 A EP98250381 A EP 98250381A EP 0997285 A1 EP0997285 A1 EP 0997285A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
nozzle plate
aligning apparatus
chip
nozzle chip
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Withdrawn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
EP98250381A
Other languages
English (en)
French (fr)
Inventor
Tse-Chi Mou
Shi-Kd Fan
Jung-Hsiang Hsu
Jing-Yuan Ho
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.)
Microjet Technology Co Ltd
Original Assignee
Microjet Technology Co Ltd
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
Priority to CA002251293A priority Critical patent/CA2251293C/en
Application filed by Microjet Technology Co Ltd filed Critical Microjet Technology Co Ltd
Priority to EP98250381A priority patent/EP0997285A1/de
Publication of EP0997285A1 publication Critical patent/EP0997285A1/de
Withdrawn legal-status Critical Current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
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • 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
    • B41J2002/14362—Assembling elements of heads

Definitions

  • the present invention relates to an aligning apparatus, and more particularly to one used for an inkjet nozzle.
  • the inkjet nozzle in an inkjet printer includes a nozzle chip and a nozzle plate which are aligned as follows according to the conventional technique:
  • the operator uses his right hand (RH) to control the programmable logic controller (PLC) controller 11 to actuate the feeding mechanism 12 for transmitting the nozzle chip and the nozzle plate to the positioning device 15 by which the nozzle plate is sucked above the nozzle chip by a sucker.
  • the charge coupled device (CCD) 18 will transmit images of the nozzle chip and the nozzle plate through the image interface 17 to the screen 16 of a personal computer 13 in order that the operator can thereafter begin to proceed the dull aligning operation for the nozzle chip and the nozzle plate according to the position difference thereof on screen 16.
  • the operator uses his left hand (LH) to select a specific control key on the keyboard of computer 13 for signalling the driving circuit 14 to translate and/or rotate positioning device 15 for adjusting the position of the nozzle chip until screen 16 shows that positions of the nozzle chip and the nozzle plate coincide with each other. Finally, the nozzle plate is placed on the nozzle chip.
  • LH left hand
  • an aligning apparatus used for an inkjet nozzle having a nozzle chip and a nozzle plate for aligning the nozzle chip and the nozzle plate to enable the nozzle plate to be properly placed on the nozzle chip includes a positioning device for positioning the nozzle chip and the nozzle plate, a position-determining device for determining positions of the nozzle chip and the nozzle plate and outputting position signals corresponding to the positions, and a controller electrically connected to said positioning device and said position-determining device and outputting a control signal for controlling the positioning device in response to the position signals.
  • the present aligning apparatus further includes a driver electrically connected between the controller and the positioning device for amplifying the control signal to drive the positioning device.
  • the present aligning apparatus further includes a sensing interface electrically connected between the controller and the positioning device for sensing the position signals to be used by the controller.
  • the position-determining device can determine the positions by optical images of the nozzle chip and the nozzle plate.
  • the position-determining device includes a charge coupled device for reading the optical images of the nozzle chip and the nozzle plate on the positioning device, and an image processor electrically connected to the charge coupled device for processing the optical images to obtain the position signals.
  • the nozzle plate can be generally rectangular and have a first diagonal.
  • the position of the nozzle plate can be determined by two points on the diagonal and an angle included by the diagonal and a reference horizontal axis.
  • the nozzle chip can have a generally rectangular surface having a second diagonal for placing thereon the nozzle plate.
  • the position of the nozzle chip can be determined by two points on the second diagonal and an angle included by the second diagonal and a reference horizontal axis.
  • the controller can be a personal computer.
  • the positioning device can include a rotatable and two-dimensionally translatable placing device for placing thereon nozzle chip and adjusting thereat the position of the nozzle chip, a sucker sucking thereto the nozzle plate, a driving device enabling the placing device to be rotatable and two-dimensionally translatable for aligning the nozzle chip with the nozzle plate, and a position encoder electrically connected to the placing device for encoding the position signals of the nozzle chip and the nozzle plate.
  • the driving device can include a plurality of motors.
  • FIG. 2 there is shown a block diagram schematically showing how a preferred embodiment of an aligning apparatus according to the present invention functions, which is used for an inkjet nozzle having a nozzle chip 21 and a nozzle plate 22 for aligning nozzle chip 21 and nozzle plate 22 to enable nozzle plate 22 to be properly placed on nozzle chip 21.
  • the present aligning apparatus includes a positioning device 91 having a positioning mechanism 93 for positioning nozzle chip 21 and nozzle plate 22, a position-determining device 90 electrically connected to positioning device 91 to determine positions of nozzle chip 21 and nozzle plate 22 and outputting position signals corresponding to positions of nozzle chip 21 and nozzle plate 22, a controller 25 electrically connected to positioning device 91 and position-determining device 90 and outputting a control signal for controlling positioning device 91 in response to the position signals, a driver 26 electrically connected between controller 25 and positioning device 91 for amplifying the control signal to drive positioning device 91, and a sensing interface 30 electrically connected between controller 25 and positioning device 91 for sensing the position signals to be used by controller 25.
  • Position-determining device 90 can determine positions of nozzle chip 21 and nozzle plate 22 by optical images thereof and can include a charge coupled device (CCD) 23 for obtaining images of nozzle chip 21 and nozzle plate 22 on positioning mechanism 93 having a sucker 40 sucking thereto nozzle plate 22, and an image processor 24 electrically connected to charge coupled device 23 for processing the optical images of nozzle chip 21 and nozzle plate 22 to obtain position signals therefor.
  • Image processor 24 can be a part of the system program or software for processing the image.
  • Controller 25 can be a personal computer by which one can additionally control materials, and/or analyze the yield rate and/or the rejection rate by introducing therein the relevant software skill. For example, before proceeding the aligning procedure, one can design the personal computer to judge whether the fed materials are defective and/or should be rejected.
  • Sensing interface 30 can include several photosensors for sensing the position of the nozzle chip 21 to be transmitted to controller 25 for processing.
  • Nozzle plate 22 can generally be rectangular or defined to have a rectangular portion so that the position of nozzle plate 22 can be determined by two points on the diagonal thereof and an angle included by the diagonal and a reference horizontal axis.
  • nozzle chip 21 can also have a corresponding generally rectangular surface having a second diagonal for placing thereon nozzle plate 21 so that the position of nozzle chip 21 can be determined by two points on the second diagonal and an angle included by the second diagonal and a reference horizontal axis.
  • Positioning mechanism 93 in this particular embodiment can include a rotatable and two-dimensionally translatable placing device 28 for placing thereon nozzle chip 21 and adjusting thereat the position of nozzle chip 21, sucker 40, driving device 27 which is electrically connected between driver 26 and placing device 28 and can include a plurality of motors for respectively enabling placing device 28 to be rotatable and two-dimensionally translatable for aligning nozzle chip 21 with nozzle plate 22, and a position encoder device 29 which is electrically connected to placing device 28 and can include a plurality of position encoders, e.g. optical rulers for X/Y-axis movement or an optical angle encoder for angular movement, for encoding the position signal of placing device 28 or nozzle chip 21 moved by driving device 27.
  • driving device 27 which is electrically connected between driver 26 and placing device 28 and can include a plurality of motors for respectively enabling placing device 28 to be rotatable and two-dimensionally translatable for aligning nozzle chip 21 with nozzle plate 22, and a
  • position encoder device 29 decides the precision thereof.
  • Controller 25 sends a control signal to drive positioning mechanism 93 to rotate according to the difference between 1 and 2 in order that 1 and 2 coincide with each other.
  • Controller 25 sends a control signal to drive positioning mechanism 93 to translate along the abscissa according to the horizontal difference between nozzle chip 21 and nozzle plate 22.
  • controller 25 sends a control signal to drive positioning mechanism 93 to translate along the ordinate according to the vertical difference between nozzle chip 21 and nozzle plate 22 to complete the aligning operation.
  • FIG. 4 there is shown a flow chart showing how an aligning apparatus according to the present invention proceeds the aligning operations which includes:
  • step 64 Determining whether the positions (A, B, and C, D) coincide with each other, if yes, come to an end; if not, go to step 65.

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Ink Jet (AREA)
EP98250381A 1998-10-22 1998-10-29 Vorrichtung zum Ausrichten von Tintenstrahldüsen Withdrawn EP0997285A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA002251293A CA2251293C (en) 1998-10-22 1998-10-22 Inkjet nozzle aligning apparatus
EP98250381A EP0997285A1 (de) 1998-10-22 1998-10-29 Vorrichtung zum Ausrichten von Tintenstrahldüsen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA002251293A CA2251293C (en) 1998-10-22 1998-10-22 Inkjet nozzle aligning apparatus
EP98250381A EP0997285A1 (de) 1998-10-22 1998-10-29 Vorrichtung zum Ausrichten von Tintenstrahldüsen

Publications (1)

Publication Number Publication Date
EP0997285A1 true EP0997285A1 (de) 2000-05-03

Family

ID=32963005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98250381A Withdrawn EP0997285A1 (de) 1998-10-22 1998-10-29 Vorrichtung zum Ausrichten von Tintenstrahldüsen

Country Status (2)

Country Link
EP (1) EP0997285A1 (de)
CA (1) CA2251293C (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0564080A2 (de) * 1992-04-03 1993-10-06 Hewlett-Packard Company Ausrichtung einer Trägerplatte gegenüber den Düsen in einem Tintenstrahldruckkopf
JPH0691453A (ja) * 1992-09-14 1994-04-05 Canon Inc インクジェット用ヘッドの組立方法
EP0791462A2 (de) * 1990-11-02 1997-08-27 Canon Kabushiki Kaisha Gerät zur Herstellung von Tintenstrahldruckköpfen
JPH106509A (ja) * 1996-06-24 1998-01-13 Ricoh Co Ltd インクジェットヘッド接合装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0791462A2 (de) * 1990-11-02 1997-08-27 Canon Kabushiki Kaisha Gerät zur Herstellung von Tintenstrahldruckköpfen
EP0564080A2 (de) * 1992-04-03 1993-10-06 Hewlett-Packard Company Ausrichtung einer Trägerplatte gegenüber den Düsen in einem Tintenstrahldruckkopf
JPH0691453A (ja) * 1992-09-14 1994-04-05 Canon Inc インクジェット用ヘッドの組立方法
JPH106509A (ja) * 1996-06-24 1998-01-13 Ricoh Co Ltd インクジェットヘッド接合装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 354 (M - 1632) 5 July 1994 (1994-07-05) *
PATENT ABSTRACTS OF JAPAN vol. 098, no. 005 30 April 1998 (1998-04-30) *

Also Published As

Publication number Publication date
CA2251293C (en) 2003-05-20
CA2251293A1 (en) 2000-04-22

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