WO2007065192A1 - Imprimante a jet d'encre comprenant un rouleau d'entrainement lisse - Google Patents

Imprimante a jet d'encre comprenant un rouleau d'entrainement lisse Download PDF

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Publication number
WO2007065192A1
WO2007065192A1 PCT/AU2005/001834 AU2005001834W WO2007065192A1 WO 2007065192 A1 WO2007065192 A1 WO 2007065192A1 AU 2005001834 W AU2005001834 W AU 2005001834W WO 2007065192 A1 WO2007065192 A1 WO 2007065192A1
Authority
WO
WIPO (PCT)
Prior art keywords
media
roller
printhead
optionally
inkjet printer
Prior art date
Application number
PCT/AU2005/001834
Other languages
English (en)
Inventor
Kia Silverbrook
Tobin Allen King
Gregory Michael Tow
Attilla Bertok
Geoffrey Philip Dyer
Robert John Brice
Paul Ian Mackey
Original Assignee
Silverbrook Research Pty 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
Application filed by Silverbrook Research Pty Ltd filed Critical Silverbrook Research Pty Ltd
Priority to PCT/AU2005/001834 priority Critical patent/WO2007065192A1/fr
Priority to EP05813462.8A priority patent/EP1960209A4/fr
Publication of WO2007065192A1 publication Critical patent/WO2007065192A1/fr

Links

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
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/103—Sheet holders, retainers, movable guides, or stationary guides for the sheet feeding section
    • 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
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/02—Rollers
    • 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
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/02—Rollers
    • B41J13/076—Construction of rollers; Bearings therefor

Definitions

  • the engagement means slidably engages with the support frame by sliding parallel to the transport path.
  • a printer further comprising second fixing means for fixing the roller to the support frame at the second end of the roller, the second fixing means comprising: a second bearing into which the second end of the roller is positioned for allowing the rotation of the roller, the second bearing being configured to allow the pivotal movement of the elongate roller about the second end during the sliding engagement of the engagement means and support frame.
  • the plurality of rollers are arranged, in use, to transport the print media past a pagewidth printhead, the printhead being incorporated in a printing cartridge which is removably engageable with the printer.
  • the fixing plate incorporates at least one tab configured to slidably engage with a slot of the support frame in the engagement step.
  • the second bearing is configured to accommodate the angular movement of the roller.
  • the second bearing is configured to only contact the second end of the roller about a line around the circumference of the roller throughout the angular movement of the roller in the step of engaging the first fixing plate.
  • the step of positioning the roller comprises positioning a plurality of elongate rollers so as to be supported at their longitudinal first ends by the support frame and positioned at their longitudinal second ends in a respective one of a plurality of second bearings of the second fixing plate, each second bearing being configured to allow rotation of the respective roller about the second end thereof;
  • the step of positioning the first bearing of the first fixing plate comprises positioning a plurality of first bearings about the first end of each respective roller, each first bearing being configured to allow rotation of the respective roller about the first end thereof; and in the step of engaging the first fixing plate, the configuration of each of the bearings allows the pivoting of the respective elongate roller about the second end thereof.
  • the support frame has a slot through which the first end of the shaft is able to pass so as to engage with the bearing of the fixing means, the slot being configured to allow movement of the first end during the sliding engagement of the engagement means and support frame.
  • the capper is incorporated in the printing cartridge.
  • a pagewidth is about 100 mm.
  • the present invention provides a method of assembling a capping mechanism of an inkjet printer, the method comprising the steps of:
  • each of the bearings allows the pivoting of the respective elongate shaft about the second end thereof.
  • the first gear incorporates the code feature.
  • the step of mounting the second gear assembly comprises mounting a pin of a third gear of the second gear assembly to the body so that the third gear meshes with the second gear of the first gear assembly.
  • each eccentricity feature is configured to go into and out of cooperation with the respective actuator feature of the capper based on the rotated position of the third gears in relation to the capper.
  • the motor and driven roller are incorporated in a molded body of the pick-up device.
  • the driven roller is arranged to contact the sheet media through an opening in a lid of the media cartridge.
  • a pick-up roller arranged to be rotated so as to contact and pick-up sheet media from a supply of sheet media and deliver the picked sheet media to the sheet media transport mechanism;
  • the gear assembly is configured to rotate the pick-up roller at a rotational speed which delivers the sheet media to the sheet media transport mechanism at a first speed; the sheet media transport mechanism is configured to transport the sheet media at a second speed; and the first speed is lower than the second speed.
  • the first speed is about 5% lower than the second speed.
  • Fig. 5 shows an exploded view of the cradle unit and a media supply cartridge of the printer
  • Figs. 16 and 17 illustrate respective operational positions of the jig
  • Fig. 19 shows a cross-sectional view of an operational arrangement of capping gears with actuator features of a capper of the printhead cartridge
  • Fig. 27 shows a perspective view illustrating the mounting of a connection interface
  • the contact surface of the pad which defines the capping zone, sealingly engages with the nozzles of the printhead thereby capping or covering the nozzles.
  • This capping isolates the ink within the nozzles from the exterior, thereby preventing evaporation of water from the primed ink from the nozzles and the exposure of the nozzles to potentially fouling particulate matter during non-operation of the printhead.
  • the contact surface is disengaged from the nozzles, allowing printing to be performed.
  • the minimum gap is set to be less than the thickness of the print media which is to be transported by the drive and idler rollers.
  • the minimum gap is set to be about 200 microns when photo paper having a thickness of at least 250 microns is used.
  • locators 448, arms 462, protrusions 474 and bearing apertures formed as part of the molding are located 442, locators 448, arms 462, protrusions 474 and bearing apertures formed as part of the molding.
  • the bearings 444,452 of the fixing plates 440,460 are configured to allow pivotal movement of the capper shaft 432 and rollers 450,454,456 during assembly. This pivotal movement is needed due to the angular mismatch between the first and second ends of the capper shaft 432 and rollers 454,456 when they are positioned in the mounted first fixing plate 440 and yet to be mounted second fixing plate 460. This angular movement of the rigid shaft and rollers is required so that potentially damaging stresses are not placed on the shafts, rollers, bearings and/or support frame. In the final mounted position, the configuration of the bearings 444,452 align the capper shaft 432 parallel to the capper and align the rollers 454,456 perpendicular to the transport direction of print media.
  • Fig. 13 A Conventional roller or ring bearings for a shaft/roller are illustrated in Fig. 13 A.
  • the bearing mount or contact face 478 of the roller bearings 444,452 of the present invention has an angular or triangular face with respect to the capper shaft 432 and rollers 454,456.
  • a relatively wide range of angular movement of the capper shaft and rollers characterised by pivotal movement about the first end of the capper shaft and rollers as illustrated by the solid and dashed depictions in Fig. 13B 5 is made possible.
  • the illustrated gear train 550 has five gears, including a motor gear 556 located on a shaft of the picker motor 552, a picker gear 558 located on a shaft of the picker roller 548 and three intermediate gears 560. With respect to the intermediate gears 560, the gear 560a adjacent (i.e., closest to) the picker gear 558 is a simple gear, whereas the other two intermediate gears 560b and 560c are compound gears.
  • the (compound) gear train 550 is used to transfer the rotational driving force of the picker motor 552 to the picker roller 548 so that the picker roller 548 is rotated at a predete ⁇ nined rotational speed.
  • the gear train provides a gearing ratio of 50:1 at the picker roller.
  • the picker roller 548 comprises a grip tyre 548a arranged on the roller shaft which grips the sheet media of the inserted media supply cartridge.
  • the grip tyre is preferably made of rubber.
  • the mounted position of the pick-up device 542 (see Fig. 6) is configured so that the picker roller 548 picks the sheet media from the inserted media supply cartridge and delivers the leading edge of the sheets to the pinch of the drive and idler rollers, which then take-up the sheets for transport past the printhead of the inserted printhead cartridge.
  • the picker roller 548 may bounce and drag on the sheets as they are being taken up due to a swinging motion of the picker assembly 546 about the pivot points 544b,554c. This bouncing and dragging generally has a negligible effect on the take- up of the sheets, however it may cause wear on the rubber grip tyre 548a of the picker roller 548 and the bearings of the gear train 550, and velocity spikes in the transport of the sheets, which are undesired due to the possible effect on the print quality.
  • the holes 566b are engaged with the details 510b by tilting the connection interface 564 board against a face 510c of the printhead cartridge slot 510a. A tilt angle of up to 1.5 degrees may be accommodated. In this mounted position, the power and data connections 568 are exposed for connection to like connections of the inserted printhead cartridge 200, as illustrated in Fig. 6.
  • the capper sensor 574 is used by the print control circuitry 570 to operate the capper motor 482 to position the capper out and into its capped position.
  • the capper sensor 574 is also used to reposition the eccentricity features 494 of the eccentric gears 492 in order to correct the movement caused by the aforementioned meshing of the coded and motor gears 480 and 508 during assembly.
  • the print control circuitry board 572 also has connection ports 576 for connecting the capper motor 482, the drive motor 526, the encoder sensor 540, the picker motor 552 and the media sensor 522 to the power supply and print control circuitry, as illustrated in Fig. 30.
  • buttons 578 and indicators 580 such as LEDs, for the function and control of the printer 100 are also incorporated on the print control circuitry board 572.
  • the control buttons 578 include an on/off button and a print function button, where the print function button may be operated by a user to control functioning of the printer 100, such as media feed, reprint, creation of print effects, etc.
  • the indicators 580 may include operation status, print status, printhead cartridge, ink volume, media supply, PC/camera connection, etc, indicators.
  • the buttons and indicators 578,580 are positioned to locate within the control panel 418 when the upper portion 428 of the body 402 is assembled onto the support frame 434 (see Fig. 5).
  • the complexity of the print control circuitry 570 is minimised by arranging certain circuitry in the connection interface 564.
  • power regulation circuitry 582 and/or power storage circuitry 584 is integrated in the connection interface 564.
  • An exemplary power regulation circuit 582 is illustrated in Fig. 32.
  • the illustrated regulator is a hysteretic regulator based on an LM3485 control chip, and takes an input voltage V JN of 12 Volts at an input current of 2 Amps and outputs a regulated voltage V PO s of up to 5.5 Volts at a regulated current of 3.5 Amps to the inserted printhead.
  • V JN an input voltage
  • V PO s regulated voltage
  • the maximum total variation in the output voltage under all load conditions is 100 milliVolts. This variation occurs due to load transients on the output capacitors and the ripple due to the hysteretic control, and is not significant enough to adversely effect the print quality.
  • the assembly With the internal components of the cradle unit 400 assembled and the various connections made, the assembly is encased with the upper and lower portions 428 and 430 of the body 402, by securing the upper and lower portions to the support frame 434 with screws or the like, and the lid 404 is hingedly attached to the upper portion 428.
  • the media supply cartridge 600 is inserted into the media supply cartridge slot 412 of the cradle unit 400 so as to locate in the media supply cartridge support 544 of the pick-up device 542.
  • the media supply cartridge 600 is held in place by the engagement of recesses 612 in the cartridge 600 with (molded) details 544e of the media cartridge support 544 (see Figs. 1 and 35).

Landscapes

  • Ink Jet (AREA)

Abstract

L'invention concerne une imprimante à jet d'encre (100) comprenant : un magasin de papier (412) et un ensemble formé par un rouleau d'entraînement lisse (452) et un rouleau guide-papier (450), conçu, lors de l'utilisation de l'imprimante, pour extraire un support du magasin de papier (412) et pour l'acheminer vers une tête d'impression (200) comportant une pluralité de buses d'impression conçues pour imprimer des symboles sur le support lorsque ce dernier passe à proximité des buses. Le rouleau d'entraînement lisse (452) est commandé de manière à transmettre un mouvement de translation au support lorsqu'il entre en contact avec ce dernier, la surface de contact du rouleau d'entraînement lisse (452) qui entre en contact avec le support étant sensiblement lisse.
PCT/AU2005/001834 2005-12-05 2005-12-05 Imprimante a jet d'encre comprenant un rouleau d'entrainement lisse WO2007065192A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/AU2005/001834 WO2007065192A1 (fr) 2005-12-05 2005-12-05 Imprimante a jet d'encre comprenant un rouleau d'entrainement lisse
EP05813462.8A EP1960209A4 (fr) 2005-12-05 2005-12-05 Imprimante a jet d'encre comprenant un rouleau d'entrainement lisse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/AU2005/001834 WO2007065192A1 (fr) 2005-12-05 2005-12-05 Imprimante a jet d'encre comprenant un rouleau d'entrainement lisse

Publications (1)

Publication Number Publication Date
WO2007065192A1 true WO2007065192A1 (fr) 2007-06-14

Family

ID=38122387

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2005/001834 WO2007065192A1 (fr) 2005-12-05 2005-12-05 Imprimante a jet d'encre comprenant un rouleau d'entrainement lisse

Country Status (2)

Country Link
EP (1) EP1960209A4 (fr)
WO (1) WO2007065192A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5462373A (en) * 1994-05-03 1995-10-31 Hewlett-Packard Company Sheet advancement system with phase-adjustable roller arrangement
JP2000302280A (ja) * 1999-04-16 2000-10-31 Ricoh Co Ltd 搬送装置
JP2004090484A (ja) * 2002-08-30 2004-03-25 Konica Minolta Holdings Inc インクジェットプリンタ
US20040091298A1 (en) * 2002-11-06 2004-05-13 Nellen Wilhelmus H.J. Guiding apparatus for an inkjet printer

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4968882A (en) * 1989-04-24 1990-11-06 Calcomp Inc. Adjustable optical shaft encoder and calibration method for printers and plotters
EP0581276B1 (fr) * 1992-07-31 2001-11-07 Canon Kabushiki Kaisha Dispositif pour le transport de feuilles
US6042100A (en) * 1998-03-03 2000-03-28 Hewlett-Packard Company Soft pinch roller to reduce hand-off error
US6851801B2 (en) * 2001-08-29 2005-02-08 Canon Kabushiki Kaisha Recording material conveying device and ink jet recording apparatus using such device
US6536896B1 (en) * 2001-09-07 2003-03-25 Venture Manufacturing (Singapore) Ltd. Media feed assembly with double pinching rollers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5462373A (en) * 1994-05-03 1995-10-31 Hewlett-Packard Company Sheet advancement system with phase-adjustable roller arrangement
JP2000302280A (ja) * 1999-04-16 2000-10-31 Ricoh Co Ltd 搬送装置
JP2004090484A (ja) * 2002-08-30 2004-03-25 Konica Minolta Holdings Inc インクジェットプリンタ
US20040091298A1 (en) * 2002-11-06 2004-05-13 Nellen Wilhelmus H.J. Guiding apparatus for an inkjet printer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1960209A4 *

Also Published As

Publication number Publication date
EP1960209A1 (fr) 2008-08-27
EP1960209A4 (fr) 2013-11-06

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