WO2000043209A1 - Tete d'impression comportant un dispositif d'admission d'air - Google Patents

Tete d'impression comportant un dispositif d'admission d'air Download PDF

Info

Publication number
WO2000043209A1
WO2000043209A1 PCT/NL2000/000022 NL0000022W WO0043209A1 WO 2000043209 A1 WO2000043209 A1 WO 2000043209A1 NL 0000022 W NL0000022 W NL 0000022W WO 0043209 A1 WO0043209 A1 WO 0043209A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
print head
movement
removal
supply
Prior art date
Application number
PCT/NL2000/000022
Other languages
English (en)
Inventor
Henricus Wilhelmus KRÜS
Original Assignee
Stork Digital Imaging B.V.
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 Stork Digital Imaging B.V. filed Critical Stork Digital Imaging B.V.
Priority to AU23314/00A priority Critical patent/AU2331400A/en
Publication of WO2000043209A1 publication Critical patent/WO2000043209A1/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
    • 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—Preventing or detecting 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
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/1714—Conditioning of the outside of ink supply systems, e.g. inkjet collector cleaning, ink mist removal
    • 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
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/18—Ink recirculation systems
    • B41J2/185—Ink-collectors; Ink-catchers

Definitions

  • Print head having air suction
  • the invention relates to a print head for an inkjet printer, comprising a body for positioning ink nozzle means which are directed towards the front side of the print head, air-removal means which are directed towards the front side for removing air, and air-supply means which are directed towards the front side for supplying air, and guide means in order to guide a movement of the print head parallel to this front side.
  • a print head of this nature is known from US patent 4,369,450.
  • Inkjet printers are in widespread use for printing various types of substrates, such as paper and textiles. These printing appliances enable a very high printing quality to be achieved at a high printing speed.
  • mist of minuscule ink droplets may form in the vicinity of the substrate.
  • a so-called “ink mist” of this nature is caused by charged ink drops impinging on the substrate; the ink drop “splashes” when it strikes the substrate and thus produces a number of small ink droplets which remain suspended in the air in the vicinity of the substrate.
  • Ink mist is also caused by ink drops which only partially strike the collecting element and thus break up into a plurality of small ink drops.
  • a collecting element of this nature for example a so- called beam gutter, is used to collect ink drops which are not to reach the substrate.
  • the fan allows the air which has been sucked in and filtered to flow back out via a second chamber with an opening in the front surface of the print head, from which opening the ink also passes outwards, so that the ink mist is prevented from being deposited on the deflection electrodes arranged in the second chamber.
  • One drawback of this known inkjet printer is that the filtered air flows out in the immediate vicinity of the deflected ink drops, which may cause interference with the direction of flow of the ink drops. Furthermore, no additional measures are taken to ensure that ink mist formed is actually sucked out. In fact, there is a considerable risk with the embodiment shown in this patent that ink mist will not enter the air-removal chamber.
  • US-A-5, 877, 788 (corresponds to WO 96/35584) has disclosed a device for cleaning the front surface of an inkjet printer using a fluid.
  • air is blown over the front surface of the print head along the ink nozzle means from a first side and is removed on the opposite side.
  • the object of the invention is to avoid the abovementioned and other drawbacks of the prior art and to provide a print head for inkjet printers which allows air and ink mist to be removed completely.
  • a further object of the invention is to provide a print head which allows effective removal in the direction of movement of the print head.
  • a print head of the type described in the preamble is characterized in that the air-removal means are arranged to remove air behind the ink nozzle means, as seen in the direction of movement, and the air-supply means are arranged to supply air behind the air-removal means, as seen in the direction of movement.
  • the print head according to the invention is designed in such a manner that the air-removal means and the air- supply means are arranged in the immediate vicinity of one another at one end of the print head.
  • Arranging the air-supply and air- removal means in the immediate vicinity of one another results in an optimum utilization of the local excess pressure.
  • a compact structure of the print head is obtained.
  • Arranging the assemblies of the air-removal means and the air-supply means at one end of the print head results in the maximum possible effectiveness of this assembly.
  • air-removal means and air-supply means are arranged at both ends of the print head. This ensures that in the case of a print head which executes a reciprocating movement, ink mist is removed in both directions of movement.
  • the air-removal means may comprise a discharge element which is connected to a discharge pump by means of a hose. Then, an essentially constant reduced pressure is generated, resulting in uniform suction.
  • the print head according to the invention is designed in such a manner that the air-supply means comprise a supply nozzle which is connected to an air-collecting member which is directed in the direction of movement. Providing an air- collecting member which is directed in the direction of movement allows air to be collected during the movement of the print head and to be guided to the supply nozzle, which is connected to the air-collecting member. As a result, the air supply is made dependent on the speed of the print head, i.e. the local excess pressure which is brought about by the air-supply means increases as the speed of the print head rises. Obviously, it is possible to use an air pump and a hose instead of an air-collecting member.
  • a shield plate with openings arranged therein for the ink nozzle means is arranged on the front side of the print head. In this way, it is possible for the ink mist to be, as it were, enclosed between the substrate and the shield plate, making it possible for the ink mist to be removed more effectively.
  • the invention furthermore provides an inkjet printer which is provided with a print head with air-supply means and air- removal means. Moreover, the invention provides a method for printing a substrate using an inkjet printer which comprises at least one print head which can move with respect to the substrate and has ink nozzle means at a jetting position, excess pressure being created at a first position and reduced pressure being created at a second position in the immediate vicinity of the print head, in which method, as seen in the direction of movement, the second position is located between the jetting position and the first position.
  • Fig. 1 shows an outline sketch of the print head according to the invention.
  • Fig. 2 diagrammatically depicts a front view of a print head according to the invention.
  • Fig. 3 diagrammatically depicts a plan view of the print head shown in Fig. 2.
  • Fig. 4 diagrammatically depicts a side view of the print head shown in Fig . 2.
  • the print head 1 which is only diagrammatically depicted in Fig. 1, comprises an ink nozzle unit 3 which is located at a certain distance from a substrate 15. During operation, the print head 1 moves with respect to the substrate 15 in the direction indicated by A (to the left in the drawing) .
  • the print head 1 furthermore comprises an air-removal element 4 with a removal nozzle 8 which is directed towards the substrate 15. As seen in the direction of movement A, the air-removal element 4 is situated behind the ink nozzle unit 3.
  • a reduced pressure is formed at a position in the vicinity of the removal nozzle 8 under the influence of the air-removal element 4, which may be connected to an air-removal pump (not shown) . Under the influence of this reduced pressure, ink mist 10 which is situated between the ink nozzle unit 3 and the substrate 15 will be removed via the air- removal element 4.
  • the print head 1 also comprises an air-supply element 5 which is arranged behind the ink nozzle unit 3 and the air-removal element 4, as seen in the direction of movement A. Air is supplied under the influence of air-supply element 5, which may be connected to an air-supply pump (not shown) and has a supply nozzle 9 facing towards the substrate 15. Under the influence of this air, a local excess pressure is generated at a position in the vicinity of the supply nozzle 9.
  • the generation of an excess pressure in the vicinity of the substrate 15, at the rear side of the print head 1 as seen in the direction of movement A, has the advantage of forming a "sweeping effect", with the result that the ink mist 10 can be removed very effectively.
  • the excess pressure forms an air cushion which prevents the print head 1 from moving past the ink mist 10 without removing the latter.
  • an air flow along the substrate 15 is formed between the supply nozzle 9 and the removal nozzle 8, the direction of which air flow corresponds to the direction of movement A of the print head. This air flow contributes to very effective removal of the ink mist 10.
  • Fig. 2 shows a front view, partially in section, of an embodiment of a print head according to the invention.
  • the front side of the print head 1 shown in Fig. 2 is directed towards the substrate in operation.
  • the print head 1 comprises a body 2 for ink nozzle elements (not shown) to be arranged on.
  • a guide element 7 is connected to the body 2. This guide element 7 allows a reciprocating movement in the directions of movement A and B to take place.
  • a combined air-removal and air-supply element 4, 5 is attached to each end of the body 2.
  • the air-removal element 4 has an approximately square removal nozzle 8, while the air-supply nozzle 9 of the air-supply elements is relatively narrow.
  • the length of the air-supply nozzle 9 corresponds to the length of the air-removal nozzle 8.
  • the air-removal elements 4 are connected to an air- removal pump (not shown) via a removal pipe 6, while the air-supply elements 5 are in communication with air-collecting members 11, as will be explained in more detail with reference to Fig 3.
  • the side view illustrated in Fig. 3 also shows the body 2 to which the guide element 7 is attached.
  • the guide element 7 comprises a hollow tube through which a guide pin (not shown) can be fitted.
  • the air-collecting member 11 is provided with an inlet opening 14, which is in each case directed towards a direction of movement A, B, cf. Fig. 2.
  • the inlet opening 14 of the air-collecting member 11 will collect air which is guided to the supply nozzle 9 from the air-supply element 5.
  • the supply nozzle 9 is directed towards the substrate 15.
  • an air-removal element 4 an air-supply element 5 and an air-collecting member in each case form a single unit, it is, of course, possible for these elements to be designed as separate elements.
  • the cross section of the air- collecting member 11 decreases gradually from the inlet opening 14 towards the air-supply nozzle 9.
  • the diameter actually increases transversely with respect to the front side F. The shape shown makes it possible to achieve highly effective guidance of air.
  • the air-removal elements 4 are substantially triangular in cross section and each open out in a removal pipe 6 which is connected to a removal hose (not shown) of a discharge pump.
  • the use of the air-collecting members 11 provides an air supply which is dependent on the speed of the print head. In other words, if the print head 1 is at a standstill, no air will be supplied. In this way, the so-called "sweeping effect" of the local excess pressure is only generated when required.
  • a shield plate 12 is provided for the ink nozzle units 3 (cf . also Fig. 2) .
  • This shield plate 12 is used to stop the ink mist from spreading.
  • openings 13 in the shield plate 12 through which openings ink drops can reach the substrate.

Abstract

L'invention concerne une tête d'impression (1) pour imprimante à jet d'encre, qui comprend un corps (2) pour positionner des unités de buses à encre (3) orientées vers l'avant (F) de la tête d'impression (1), et des éléments de guidage (7) pour guider un mouvement de la tête d'impression (1) parallèlement à l'avant (F). Pour extraire un brouillard d'encre à proximité de la tête d'impression, la tête d'impression est équipée d'au moins un élément d'extraction d'air (4) également orienté vers l'avant (F) et installé derrière les unités de buses à encre (3) tel qu'on peut l'observer dans le sens du mouvement. Pour enlever plus efficacement le brouillard d'encre, la tête d'impression (1) est en outre équipée d'au moins un élément d'admission d'air (5) dirigé vers l'avant (F) pour amener l'air à l'arrière des éléments d'extraction d'air (4) tel qu'on peut l'observer dans le sens du mouvement. De préférence, les éléments d'extraction d'air (4) et les éléments d'admission d'air (5) sont disposés les uns dans le voisinage immédiat des autres, à une extrémité de la tête d'impression (1).
PCT/NL2000/000022 1999-01-19 2000-01-13 Tete d'impression comportant un dispositif d'admission d'air WO2000043209A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU23314/00A AU2331400A (en) 1999-01-19 2000-01-13 Print head having air suction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1011065 1999-01-19
NL1011065A NL1011065C2 (nl) 1999-01-19 1999-01-19 Drukkop met luchtafzuiging.

Publications (1)

Publication Number Publication Date
WO2000043209A1 true WO2000043209A1 (fr) 2000-07-27

Family

ID=19768497

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2000/000022 WO2000043209A1 (fr) 1999-01-19 2000-01-13 Tete d'impression comportant un dispositif d'admission d'air

Country Status (3)

Country Link
AU (1) AU2331400A (fr)
NL (1) NL1011065C2 (fr)
WO (1) WO2000043209A1 (fr)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002036347A3 (fr) * 2000-10-31 2002-08-22 Zipher Ltd Appareil d'impression
WO2002073541A1 (fr) * 2001-03-13 2002-09-19 Frama Ag Affranchisseuse
WO2005044563A2 (fr) * 2003-11-04 2005-05-19 Videojet Technologies Inc. Procede et appareil pour reduire l'accumulation de debris dans une tete d'impression a jet d'encre
EP1839891A2 (fr) 2006-03-30 2007-10-03 FUJIFILM Corporation Appareil d'enregistrement à jet d'encre
EP2384895A1 (fr) * 2010-05-07 2011-11-09 Ricoh Company, Ltd. Appareil de formation d'images incluant une tête d'enregistrement à éjection de liquide
EP2454098A1 (fr) * 2010-01-25 2012-05-23 Hewlett Packard Development Company, L.P. Dispositifs d'imagerie à haute résolution angulaire et procédés de fonctionnement de dispositif d'imagerie à haute résolution angulaire
JP2014221541A (ja) * 2013-05-14 2014-11-27 キヤノン株式会社 画像形成装置
JP2015083372A (ja) * 2013-09-20 2015-04-30 キヤノン株式会社 液体吐出装置、ミスト回収機構及びミスト回収方法
JP2015085679A (ja) * 2013-09-24 2015-05-07 キヤノン株式会社 記録装置
JP2015229273A (ja) * 2014-06-04 2015-12-21 キヤノン株式会社 液体吐出装置
US9315037B2 (en) 2012-10-30 2016-04-19 Hewlett-Packard Development Company, L.P. Ink aerosol filtration
JP2016175238A (ja) * 2015-03-19 2016-10-06 キヤノン株式会社 液体吐出装置および液体吐出ヘッド
JP2016175402A (ja) * 2015-03-19 2016-10-06 キヤノン株式会社 液体吐出ヘッドの製造方法
JP2016182762A (ja) * 2015-03-26 2016-10-20 セイコーエプソン株式会社 液体吐出装置
JP2016221742A (ja) * 2015-05-28 2016-12-28 株式会社リコー 液体を吐出する装置
JP2017132192A (ja) * 2016-01-29 2017-08-03 コニカミノルタ株式会社 インクジェット記録装置及びインクジェット記録方法
WO2017196334A1 (fr) * 2016-05-12 2017-11-16 Hewlett-Packard Development Company, L.P. Génération d'un écoulement d'air de refroidissement pour une tête d'impression
JP2018030290A (ja) * 2016-08-24 2018-03-01 株式会社ミマキエンジニアリング インクジェットプリンター
JP2020131551A (ja) * 2019-02-20 2020-08-31 理想科学工業株式会社 液剤ミスト回収装置
CN114746274A (zh) * 2019-11-11 2022-07-12 斯克罗纳股份公司 带有用于侧向墨水偏转的拆分式屏蔽电极的电动打印头

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US4369450A (en) 1972-12-29 1983-01-18 Sharp Kabushiki Kaisha Printer head in an ink jet system printer
US4746938A (en) * 1985-07-11 1988-05-24 Matsushita Electric Industrial Co. Ltd. Ink jet recording apparatus with head washing device
JPH02252564A (ja) * 1989-03-28 1990-10-11 Canon Inc インクジェット記録装置
EP0423820A2 (fr) * 1989-10-19 1991-04-24 Seiko Epson Corporation Imprimante à jet d'encre
GB2280149A (en) * 1993-06-23 1995-01-25 Willett Int Ltd Preventing nozzle clogging in ink-jet printers.
WO1996035584A1 (fr) 1995-05-09 1996-11-14 Moore Business Forms, Inc. Systeme et procede de nettoyage par un fluide pour des buses d'impression par jet d'encre fonctionnant en continu

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NL1008762C2 (nl) 1998-03-31 1999-10-01 Stork Digital Imaging Bv Werkwijze voor het vormen van beeldpunten op een substraat.

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US4369450A (en) 1972-12-29 1983-01-18 Sharp Kabushiki Kaisha Printer head in an ink jet system printer
US4746938A (en) * 1985-07-11 1988-05-24 Matsushita Electric Industrial Co. Ltd. Ink jet recording apparatus with head washing device
JPH02252564A (ja) * 1989-03-28 1990-10-11 Canon Inc インクジェット記録装置
EP0423820A2 (fr) * 1989-10-19 1991-04-24 Seiko Epson Corporation Imprimante à jet d'encre
GB2280149A (en) * 1993-06-23 1995-01-25 Willett Int Ltd Preventing nozzle clogging in ink-jet printers.
WO1996035584A1 (fr) 1995-05-09 1996-11-14 Moore Business Forms, Inc. Systeme et procede de nettoyage par un fluide pour des buses d'impression par jet d'encre fonctionnant en continu
US5877788A (en) 1995-05-09 1999-03-02 Moore Business Forms, Inc. Cleaning fluid apparatus and method for continuous printing ink-jet nozzle

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Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 579 (M - 1063) 25 December 1990 (1990-12-25) *

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2370532B (en) * 2000-10-31 2004-06-23 Zipher Ltd Printing apparatus
WO2002036347A3 (fr) * 2000-10-31 2002-08-22 Zipher Ltd Appareil d'impression
US7600852B2 (en) 2000-10-31 2009-10-13 Zipher Limited Printing apparatus
US7419239B2 (en) 2000-10-31 2008-09-02 Zipher Limited Printing apparatus
AU2002234474B9 (en) * 2001-03-13 2008-07-10 Frama Ag Franking machine
WO2002073541A1 (fr) * 2001-03-13 2002-09-19 Frama Ag Affranchisseuse
US6758560B2 (en) 2001-03-13 2004-07-06 Frama Ag Franking machine
AU2002234474B2 (en) * 2001-03-13 2007-11-29 Frama Ag Franking machine
WO2005044563A2 (fr) * 2003-11-04 2005-05-19 Videojet Technologies Inc. Procede et appareil pour reduire l'accumulation de debris dans une tete d'impression a jet d'encre
WO2005044563A3 (fr) * 2003-11-04 2005-07-14 Videojet Technologies Inc Procede et appareil pour reduire l'accumulation de debris dans une tete d'impression a jet d'encre
EP1839891A2 (fr) 2006-03-30 2007-10-03 FUJIFILM Corporation Appareil d'enregistrement à jet d'encre
EP1839891A3 (fr) * 2006-03-30 2009-02-18 FUJIFILM Corporation Appareil d'enregistrement à jet d'encre
US7883172B2 (en) 2006-03-30 2011-02-08 Fujifilm Corporation Inkjet recording apparatus with plural heads and suction unit
US9180677B2 (en) 2010-01-25 2015-11-10 Hewlett-Packard Development Company, L.P. Hard imaging devices and hard imaging device operational methods
EP2454098A1 (fr) * 2010-01-25 2012-05-23 Hewlett Packard Development Company, L.P. Dispositifs d'imagerie à haute résolution angulaire et procédés de fonctionnement de dispositif d'imagerie à haute résolution angulaire
EP2454098A4 (fr) * 2010-01-25 2012-12-05 Hewlett Packard Development Co Dispositifs d'imagerie à haute résolution angulaire et procédés de fonctionnement de dispositif d'imagerie à haute résolution angulaire
US8622515B2 (en) 2010-05-07 2014-01-07 Ricoh Company, Ltd. Image forming apparatus including liquid-ejection recording head
EP2384895A1 (fr) * 2010-05-07 2011-11-09 Ricoh Company, Ltd. Appareil de formation d'images incluant une tête d'enregistrement à éjection de liquide
US9315037B2 (en) 2012-10-30 2016-04-19 Hewlett-Packard Development Company, L.P. Ink aerosol filtration
JP2014221541A (ja) * 2013-05-14 2014-11-27 キヤノン株式会社 画像形成装置
JP2015083372A (ja) * 2013-09-20 2015-04-30 キヤノン株式会社 液体吐出装置、ミスト回収機構及びミスト回収方法
JP2015085679A (ja) * 2013-09-24 2015-05-07 キヤノン株式会社 記録装置
JP2015229273A (ja) * 2014-06-04 2015-12-21 キヤノン株式会社 液体吐出装置
JP2016175238A (ja) * 2015-03-19 2016-10-06 キヤノン株式会社 液体吐出装置および液体吐出ヘッド
JP2016175402A (ja) * 2015-03-19 2016-10-06 キヤノン株式会社 液体吐出ヘッドの製造方法
JP2016182762A (ja) * 2015-03-26 2016-10-20 セイコーエプソン株式会社 液体吐出装置
EP3075542A3 (fr) * 2015-03-26 2016-10-26 Seiko Epson Corporation Appareil d'éjection de liquide
JP2016221742A (ja) * 2015-05-28 2016-12-28 株式会社リコー 液体を吐出する装置
JP2017132192A (ja) * 2016-01-29 2017-08-03 コニカミノルタ株式会社 インクジェット記録装置及びインクジェット記録方法
WO2017196334A1 (fr) * 2016-05-12 2017-11-16 Hewlett-Packard Development Company, L.P. Génération d'un écoulement d'air de refroidissement pour une tête d'impression
JP2018030290A (ja) * 2016-08-24 2018-03-01 株式会社ミマキエンジニアリング インクジェットプリンター
JP2020131551A (ja) * 2019-02-20 2020-08-31 理想科学工業株式会社 液剤ミスト回収装置
CN114746274A (zh) * 2019-11-11 2022-07-12 斯克罗纳股份公司 带有用于侧向墨水偏转的拆分式屏蔽电极的电动打印头
CN114746274B (zh) * 2019-11-11 2024-03-08 斯克罗纳股份公司 带有用于侧向墨水偏转的拆分式屏蔽电极的电动打印头
US11970002B2 (en) 2019-11-11 2024-04-30 Scrona Ag Electrodynamic print head with split shielding electrodes for lateral ink deflection

Also Published As

Publication number Publication date
NL1011065C2 (nl) 2000-07-20
AU2331400A (en) 2000-08-07

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