EP1317340B1 - Reinigungseinheit für eine tintenstrahl-druckvorrichtung - Google Patents

Reinigungseinheit für eine tintenstrahl-druckvorrichtung Download PDF

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Publication number
EP1317340B1
EP1317340B1 EP00991650A EP00991650A EP1317340B1 EP 1317340 B1 EP1317340 B1 EP 1317340B1 EP 00991650 A EP00991650 A EP 00991650A EP 00991650 A EP00991650 A EP 00991650A EP 1317340 B1 EP1317340 B1 EP 1317340B1
Authority
EP
European Patent Office
Prior art keywords
cleaning unit
printhead
print head
suction
ink
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
EP00991650A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1317340A1 (de
Inventor
Franz Obertegger
Herbert Gasser
Josef Saboi
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.)
Durst Phototechnik AG
Original Assignee
Durst Phototechnik AG
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 Durst Phototechnik AG filed Critical Durst Phototechnik AG
Publication of EP1317340A1 publication Critical patent/EP1317340A1/de
Application granted granted Critical
Publication of EP1317340B1 publication Critical patent/EP1317340B1/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
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/1652—Cleaning of print head nozzles by driving a fluid through the nozzles to the outside thereof, e.g. by applying pressure to the inside or vacuum at the outside of the print head
    • B41J2/16532—Cleaning of print head nozzles by driving a fluid through the nozzles to the outside thereof, e.g. by applying pressure to the inside or vacuum at the outside of the print head by applying vacuum only
    • 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
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16505—Caps, spittoons or covers for cleaning or preventing drying out
    • B41J2/16508—Caps, spittoons or covers for cleaning or preventing drying out connected with the printer frame
    • 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
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/16535—Cleaning of print head nozzles using wiping constructions
    • 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
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/16552—Cleaning of print head nozzles using cleaning fluids
    • 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
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16585—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles for paper-width or non-reciprocating print heads

Definitions

  • the invention relates to a cleaning unit for a Inkjet printing device according to the preamble of Claim 1.
  • a cleaning unit according to the preamble of claim 1 is known from DE 40 00 416 A1. To a trouble-free Ensure operation by the print head regularly is cleaned, a suction and is on the printhead Cover cap attached, the printhead becomes ink suctioned off and the printhead is replaced by a suitable one Facility wiped. While this known device when using solvent inks is suitable the operational safety of the ink printhead ensure exists when using inks that pass through UV light are curable, the risk of ink residue due to the incidence of UV light on the printhead harden before using the known cleaning device can be removed.
  • the invention has for its object a Cleaning unit for an inkjet printing device create that even when using ink that through UV light is curable, reliably cleaning the Ensures printhead, and the training of Can prevent incrustations on the printhead.
  • the cleaning unit according to the invention is like this designed a suction and parking cap an opening which is completely light-tight to a printhead can be created.
  • This will, in addition to being able to use the ink aspirate from the printhead to crust the Nozzle outlets and uncontrolled formation of droplets at the nozzle outlet, ensures that at the Printhead before, during and after vacuuming no light, in particular, no UV light arrives, which leads to hardening of ink residue and a crusting of the nozzle outlets would lead.
  • the measure that the printhead is light-tight the opening of the suction and parking cap can be created supported by suitable materials and Covers are used to ensure that any ink residue no light that comes to one Curing the ink would result.
  • the suction and parking cap preferably the entire cleaning unit according to the Invention can be raised in a preferred embodiment is carried out by lifting the cap or the entire cleaning unit opening the printhead to apply.
  • the Cleaning unit can be permanently provided, and the print head can be designed to be lowered onto the cleaning unit.
  • a cover for the cleaning unit This is preferably motor-driven, so that it can be moved from the Cleaning unit is pushed away so that the Cleaning unit for the printhead or printheads is accessible when cleaning is to take place.
  • a cover to provide a stop that allows the to go to the Cleaning unit moving print head as part of its Approach movement moves the cover.
  • the system consisting of throttle and volume acts when creating one Negative pressure prevailing in a pressure tank is delaying. To The beginning is in the waste liquid bottle Ambient pressure, and the pressure in this bottle slowly drops off, so that even on the printhead from which ink is sucked off a negative pressure is slowly built up. Even if that the corresponding valve is switched off, causes the throttle a delay in the setting of normal pressure in the Waste bottle. This leads to the following Benefits. There can be a controlled rise in pressure and - Waste can be achieved and the flexible design of parts of the ink line system, for example the hoses, leads to this contract during suction and subsequently expand so that air is drawn into the lines could, and unwanted bubbles in the nozzle or the Lines are formed.
  • A is preferred for the additional cleaning of the print head Wiping unit provided, which can be raised and lowered Deflection roller with an absorbent cloth, preferably made of Fleece.
  • the process of cleaning the ink outlets is therefore as follows. First, ink is drawn from the Printhead sucked in at the nozzle exits set the defined ink condition. Below is the Printhead wiped through the wiping unit to remove any Ink residue that is in the vicinity of the ink spills to wipe.
  • the arrangement can be such that the top of the roller is at the printhead outlets, if it is in a wiping position.
  • the Ink is absorbed by the absorbent cloth.
  • the cloth can become relative move the printhead outlets so that, so to speak, over the printhead outlets are wiped.
  • one Movement of the print head and the cloth causes at the same time so that the cloth covers the area of the printhead outlets completely touched, but between the print head nozzles and there is no relative movement of the cloth, so that the Nozzles are spared.
  • a particularly gentle and yet effective cleaning of the Print head outlets are also preferred according to those Embodiment achieved in which the apex of the Deflection roller arranged laterally next to the print head outlets is. In this case, the area of the printhead outlets not touched the whole area, but the excessive ink sucked to the side to a certain extent.
  • the suction and parking cap preferably has the cleaning unit according to the invention also a second Opening into which a solvent can be introduced.
  • This is a measure that in particular Safe "parking" when using solvent inks the print head, even over a long period of time, guaranteed because the printhead outlets from solvent be washed around so that the ink does not harden can.
  • the measure mentioned is basically for the Use of solvent inks is adapted and also irrespective of whether the Printhead to the suction and parking cap to considerable Benefits is training a second, with Solvent refillable opening even when using Inks that are curable under UV light for a safe Suitable for parking the printhead.
  • the reason for this is that common inks that can be cured under UV light also contain volatile components, so they too thicken when they are protected from UV light, however, are otherwise exposed.
  • the second described Opening into which the solvent can be introduced so that the Printhead with solvent for an extended period of time can also be flooded, a crusting of the Prevent print head outlets.
  • a first so-called parking liquid pump provided that the parking liquid, i.e. a solvent, pumps out of a parking liquid tank into the cap.
  • a second parking liquid pump available that used the Pumps parking liquid into a waste tank.
  • the cap is essentially one cuboid component formed in which two different sides formed the openings mentioned are. Accordingly, the opening for suction with Vacuum can be applied, and in the other opening separate from the former opening solvent recoverable.
  • the two openings of course also side by side on one plate-shaped suction and parking cap may be provided, and the cap could accordingly be designed to be displaceable be to either one or the other opening at the Print head.
  • a preferred one Embodiment of the cleaning unit 10 a cover 12 in which four pairs of recesses 14 are formed, by which the following in more detail explained, including suction and parking caps for the printheads are accessible.
  • the illustrated Embodiment of the cleaning unit 10 is an embodiment for a four-color printing device is suitable, each with two printheads for printing one color are provided so that there are four pairs of Print heads result.
  • the cleaning unit 10 can be raised and lowered so that the print heads with their outlets through the slots 14 kick and put on the respective suction and parking cap 16 become.
  • each Suction and parking cap 16 formed two openings.
  • Example shown are both openings with a sealing lip 18 provided, in the case of the one opening, the suction of ink from the printhead is required that the opening with sufficient tightness to the Printhead is applied, so that suction of ink by means of negative pressure.
  • this opening the cap 16 hereinafter referred to as "suction opening" 20 taken. It is assumed that the suction opening 20 in the orientation of the respective shown in Fig. 1 Caps 16 located on the top.
  • rinsing opening 22 is located on one of the sides of the cap 16 and can be seen in Fig. 2.
  • a motor or cover 76 which can be displaced by means of the pressure carriage is recognizable, which is made light-tight, so that the entire cleaning unit 10 can be covered in a light-tight manner.
  • the Cap 16 is rotatable about a horizontal axis, so that optionally one of the two openings 20, 22 on the top can be arranged so that the cap 16 with this Opening can be applied to the printhead.
  • Figs. 1 and 2 is not shown in detail, is at the suction opening 20 by suitable lines and the like leading to a Lead negative pressure source, a negative pressure can be applied.
  • a solvent supply to the flushing opening 22 connected, so for example during a longer Operating break of the printhead applied to the opening 22 with Solvent can be washed around.
  • 1 and 2 are further details of the cleaning unit according to the invention shown for the explanation of the invention no further are important. However, it should be noted that the Cleaning unit 10 can be raised to all Caps 16 simultaneously to the associated printheads to apply.
  • Printheads 24 are each the area of Printhead outlets that are created by attaching to the respective Opening 20, 22 arranged entirely within the opening so that the suction from all printhead outlets of ink can be made, and this according to the invention are light-tight against the environment. Also can in the event that the printheads 24 to the flushing openings 22 are created, flooding this opening with Solvents are made so that any ink residue attached to it the printheads 24 are present, solved and the training new incrustations can be prevented.
  • the wiping unit 26 is wound on a roll 28 absorbent cloth on the various rolls up to an apex 30 of a deflection roller 34 is guided.
  • the Vertex 30 can either be directly on the surface of the Print head outlets can be arranged, or a little sideways next to any ink residue from the printhead outlets wipe or suck off by capillary action and, in the second case, the printhead outlets at the same time to spare yourself.
  • a gentle cleaning is also in the Case reached that the top of the cloth although flat the surface of the printhead outlets but the cloth moved simultaneously with the printhead to be cleaned is, so that there is no Relative movement sets, and the area of the Printhead outlets can be cleaned gently.
  • the each Used sections of the cloth are on a roll 32 wound.
  • a Motor 36 present which is connected to the belt drive Winding roll 32 is connected.
  • a motor 38 provided that the raising and lowering of the deflection roller 34th serves for this purpose on a pivotable arm 40th is stored.
  • FIG. 5 shows an advantageous hydraulic circuit for an arrangement for sucking ink from the printheads out.
  • a first valve 42 and a second Valve 44 provided, also known as "Prime Purge Valves" or Intake / blow-out valves can be called.
  • the two valves 42, 44 are open and connect the pump 46 to ambient pressure. In this condition the pump 46 can be started.
  • the pump 46 When the first valve 42 is excited, the pump in the tank 48 creates one Overpressure.
  • the second valve 44 is energized the pump 46 creates a negative pressure in the tank 48.
  • one Blow-out pressure control sensor 50 and one Suction pressure control sensor 52 is by means of a Two-point control kept the pressure constant. Furthermore are a blow-out pressure sensor 54 and an intake pressure sensor 56 for Function monitoring provided. A relay 58 is used to between the two operating modes overpressure and underpressure switch. One at each of the first valve 42 and that second valve 44 connected so-called “silencer" 60 prevents annoying whistling noises.
  • an operation for filling a printhead 70 becomes written in ink.
  • a first intake valve 62 is energized, a second intake valve 64 is not energized, and an ink waiting valve 66 is energized.
  • the second intake valve 64 will cause air bubbles in the printhead 70 "hammered out”. That way you can Air bubbles are removed from the printhead 70.
  • the ink waiting valve 66 is not energized Locks the state and prevents the ink from leaking, if the vacuum in a (not shown) tank, in which negative pressure prevails, by leaks slowly falls off.
  • Aspirating ink from printhead 70 in the Cleaning unit according to the invention works as follows. Through a system consisting of the volume of the Waste ink bottle 74 and a (not shown) A throttle becomes a negative pressure that prevails in the tank 48 Delay applied to printhead 70. In this Connection should be mentioned that with dashed lines in the 5 the cleaning unit of the printing carriage, which is in the upper right area of FIG. 5 is delineated. It is used for suction Blow valve 68 energized, and in waste ink bottle 74 a vacuum is built up with a delay. This Vacuum is also available for the defined suction of ink Printhead 70 on. When the blow valve 68 is turned off is, again, by the (not shown) Throttle delayed, in waste ink bottle 74 Ambient pressure.

Landscapes

  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP00991650A 2000-09-15 2000-12-29 Reinigungseinheit für eine tintenstrahl-druckvorrichtung Expired - Lifetime EP1317340B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT2000BZ000038A IT1316140B1 (it) 2000-09-15 2000-09-15 Unita' di pulitura per dispositivo di stampa a getto di inchiostro.
ITBZ000038 2000-09-15
PCT/EP2000/013333 WO2002022366A1 (de) 2000-09-15 2000-12-29 Reinigungseinheit für eine tintenstrahl-druckvorrichtung

Publications (2)

Publication Number Publication Date
EP1317340A1 EP1317340A1 (de) 2003-06-11
EP1317340B1 true EP1317340B1 (de) 2004-05-26

Family

ID=11440873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00991650A Expired - Lifetime EP1317340B1 (de) 2000-09-15 2000-12-29 Reinigungseinheit für eine tintenstrahl-druckvorrichtung

Country Status (9)

Country Link
US (1) US20040021726A1 (es)
EP (1) EP1317340B1 (es)
JP (1) JP2004508973A (es)
AT (1) ATE267706T1 (es)
AU (1) AU2001233672A1 (es)
DE (1) DE50006633D1 (es)
ES (1) ES2220587T3 (es)
IT (1) IT1316140B1 (es)
WO (1) WO2002022366A1 (es)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004330773A (ja) * 2003-04-18 2004-11-25 Konica Minolta Medical & Graphic Inc インクジェットプリンタ
US20040252161A1 (en) * 2003-06-11 2004-12-16 Andreas Bibl Tilt head cleaner
JP4517654B2 (ja) * 2004-01-30 2010-08-04 コニカミノルタエムジー株式会社 インクジェット記録装置
JP2006035826A (ja) * 2004-07-30 2006-02-09 Roland Dg Corp インク・ジェット・プリンタにおけるメンテナンス装置
US7963631B2 (en) * 2005-04-25 2011-06-21 Ulvac, Inc. Printhead maintenance station
US8348413B2 (en) * 2009-07-30 2013-01-08 Roland Dg Corporation Ink jet recording apparatus equipped with ultraviolet light irradiation device that moves with ink head
US8876267B2 (en) 2009-07-31 2014-11-04 Memjet Technology Ltd. Printing system with multiple printheads each supplied by multiple conduits
CN110366494A (zh) * 2017-04-20 2019-10-22 惠普发展公司，有限责任合伙企业 三维(3d)打印机模块

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0712665B2 (ja) * 1985-10-01 1995-02-15 キヤノン株式会社 インクジエツト記録装置の作動方法
JPS6364068A (ja) * 1986-09-05 1988-03-22 Ricoh Co Ltd 静電記録装置
JP2708436B2 (ja) * 1987-11-12 1998-02-04 キヤノン株式会社 記録ヘッドの清掃方法
US4928120A (en) * 1988-11-21 1990-05-22 Spectra, Inc. Orifice plate cleaner for hot melt ink jet
DE4000416C2 (de) 1990-01-09 1993-12-02 Siemens Ag Verfahren und Vorrichtung zur automatischen Betriebssicherstellung einer Tintendruckeinrichtung
JPH0725020A (ja) * 1993-07-07 1995-01-27 Fuji Xerox Co Ltd インクジェット記録装置
JPH0860051A (ja) * 1994-08-23 1996-03-05 Hitachi Ltd 液体インキ、該インキを用いた画像形成方法、及びインクジェットプリンタ
US5530463A (en) * 1994-08-25 1996-06-25 Xerox Corporation Integral seal for ink jet printheads
WO1996014989A2 (en) * 1994-11-10 1996-05-23 Lasermaster Corporation Large format ink jet printer and ink supply system
JPH08336984A (ja) * 1995-06-09 1996-12-24 Tec Corp インクジェットプリンタ
GB9611582D0 (en) * 1996-06-04 1996-08-07 Thin Film Technology Consultan 3D printing and forming of structures
US5969731A (en) * 1996-11-13 1999-10-19 Hewlett-Packard Company Print head servicing system and method employing a solid liquefiable substance
US6092890A (en) * 1997-09-19 2000-07-25 Eastman Kodak Company Producing durable ink images
JPH11291509A (ja) * 1998-04-09 1999-10-26 Seiko Epson Corp インクジェットプリンタ
US6206498B1 (en) * 1998-06-04 2001-03-27 Hitachi Koki Co., Ltd. Ink purge apparatus, ink purging method nozzle wiping apparatus and wiping method in printer
JP2000198224A (ja) * 1999-01-05 2000-07-18 Citizen Watch Co Ltd 印刷治具、メンテナンス機構及び印刷装置
US6196657B1 (en) * 1999-06-16 2001-03-06 Eastman Kodak Company Multi-fluidic cleaning for ink jet print heads

Also Published As

Publication number Publication date
ATE267706T1 (de) 2004-06-15
IT1316140B1 (it) 2003-03-28
EP1317340A1 (de) 2003-06-11
ES2220587T3 (es) 2004-12-16
ITBZ20000038A1 (it) 2002-03-15
ITBZ20000038A0 (it) 2000-09-15
DE50006633D1 (de) 2004-07-01
WO2002022366A1 (de) 2002-03-21
JP2004508973A (ja) 2004-03-25
WO2002022366A8 (de) 2002-07-04
US20040021726A1 (en) 2004-02-05
AU2001233672A1 (en) 2002-03-26

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