EP0017757A1 - Schreibkopf mit Ansaugung für Tintenstrahldrucker - Google Patents
Schreibkopf mit Ansaugung für Tintenstrahldrucker Download PDFInfo
- Publication number
- EP0017757A1 EP0017757A1 EP80101299A EP80101299A EP0017757A1 EP 0017757 A1 EP0017757 A1 EP 0017757A1 EP 80101299 A EP80101299 A EP 80101299A EP 80101299 A EP80101299 A EP 80101299A EP 0017757 A1 EP0017757 A1 EP 0017757A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- walls
- pair
- cavity
- tunnel
- print head
- 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- Withdrawn
Links
Images
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
- B41J2/07—Ink jet characterised by jet control
- B41J2/075—Ink jet characterised by jet control for many-valued deflection
- B41J2/08—Ink jet characterised by jet control for many-valued deflection charge-control type
- B41J2/09—Deflection means
-
- 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
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
Definitions
- the present invention relates to inkjet printers and, more particularly, to a suction device intended for such a printer and comprising a tunnel whose walls can move so as to prevent contamination by the ink which it contains. when the printer is turned on or off.
- the U.S. Patent No. 4,097,872 describes a suction device for an ink jet printer the main purpose of which is to create in said tunnel a gas stream which moves in parallel following ink droplets and at practically identical speed so as to reduce the aerodynamic effects on neighboring droplets.
- the section of the tunnel measured in any plane perpendicular to the longitudinal axis is practically constant, which makes it possible to maintain the speed of which the gas stream is animated at a practically constant value. It is known that, when switching on or off an inkjet printer, contamination of the walls of the suction device by ink droplets can occur (which is particularly true in the case cold start-up).
- the electrodes or deflection plates (which make up the upper and lower walls of the tunnel) are made of sintered metal and can absorb small amounts of ink falling into the suction device during switching on or off, but the tunnel walls, which are made of dielectric material, do not have this ability.
- the walls of the tunnel of the suction device are made to move away from the deflection electrodes when the printer is turned on (or off), and are then applied to the surfaces of the printer. These electrodes, in order to cause the tunnel to form after the machine has been started up, which makes it possible to prevent the walls from being contaminated by ink when the printer is started up since they are located then away from the electrodes.
- One of the main objects of the present invention is therefore to provide a suction device for an ink jet printer, the tunnel of which has movable walls.
- a printhead comprising a suction device which comprises a tunnel whose cross section is practically uniform so that the speed of the air stream flowing through it is equal to that of the ink droplets, which virtually eliminates the aerodynamic disturbances to which they are subject.
- a print head 10 which in this case is intended for an analog type deflection inkjet printer, comprises a droplet generator 11 and a suction device 20 produced in accordance with the present invention.
- the droplet generator 11 of such a printer comprises a chamber containing ink to which a disturbance is applied by means, for example, of a piezoelectric crystal, so that the jet of ink emanating from a nozzle 12 is divided into droplets 13 to which a charge is applied, if necessary, by a charging electrode 14.
- the droplets then pass between upper and lower deflection electrodes 21 and 22 respectively mounted inside of the device 20 and which cause a deflection of the droplets as a function of the load which has been applied to them. If the droplets have not received any charge (and are not used for printing purposes), they are intercepted by a gutter 15 which brings them back to a pump (not shown) and to the generator 11.
- the suction device 20 comprises a casing 23 of tubular shape and which, in the present example, is cylindrical.
- This casing is made of dielectric material, for example ceramic or plastic material, for example those sold under the name of Plexiglass or Noryl. It has at one of its ends a wall 24 in which there is, in the present example, a central opening 25 into which can be introduced and fixed means 26 comprising the charging electrode 14.
- the wall 24 can also be used fixing the casing 23 to the droplet generator 11, using, for example, the method described in U.S. Patent No. 4,097,872, supra, with the understanding that any other method of attachment which is not likely to cause turbulence in the air flowing through the tunnel of the suction or allow air to escape.
- the housing 23 comprises a cavity 27 of annular shape which is defined by axial projections 28 and 29 which respectively include the electrodes 21 and 22.
- the walls 28a and 29a, situated at the ends, are curved, as is the part interior 24a of the wall 24, so that the air introduced into the interior of the device through the inlet orifice 30 is not subject to any turbulence.
- the electrodes 21 and 22 are arranged in the cavity 27, but are separated from each other, so as to constitute at least one pair of surfaces arranged opposite and forming a first pair of walls 21a , 22a of a tunnel 31 inside the cavity 27.
- each of the deflection electrodes can have any shape, it is preferable that the parts 21b, 22b have the shape of bubbles whose parts of smaller diameter 21c, 22c, merge respectively with the surfaces 21a, 22a (see Figure 2).
- the deflection electrodes 21 and 22 made of sintered metal can absorb small quantities of ink falling inside the tunnel 31 when the printer is turned on or off
- the other two tunnel walls which are located on either side of the electrodes 21 and 22 must be made of a dielectric material and are preferably movable so that they can pass into the cavity 27, from a first position, in which they are distant from the surfaces 21a, 22a of the electrodes, at a second position, in which they are in contact with these surfaces and then define the tunnel.
- the tunnel 31 comprises an inlet opening 32 which, as can be seen in FIG. 2, is rectangular in shape, its longest side being horizontal, and an outlet orifice 33 , which is also rectangular, but the largest side of which is vertical. Therefore, the section of the tunnel at any point thereof is practically equal to its section at any other point.
- the walls 35 and 36 which are inside the cavity are mobile and, as will be seen below, can move between a first position such as that shown in FIG. 2, in which they are in contact with the surfaces of the deflection electrodes 21 and 22, and more particularly with the edges of the facing surfaces 21a and 22a, so as to define the tunnel 31 by forming the walls thereof, and a another position in which the walls 35 and 36 are distant from the facing surfaces.
- the walls 35 and 36 preferably consist of a rigid dielectric material, but having a certain elasticity, such as that sold under the name of Delrin or any other plastic material reinforced so as to form the thick parts shown in 36a and 35a.
- the walls 35 and 36 are supported by bellows-shaped elements 39 and 40 which, when an appropriate vacuum is applied by means, for example, of pipes 41 and 42, separate the walls 35 and 36 from the electrodes 21 and 22 or at least surfaces 2la and 22a so that badly directed droplets cannot strike said walls when the printer is turned on or off. This avoids any contamination of the walls as well as any risk of short-circuit resulting from the presence of ink on them.
- the printer When the printer is turned on, compressed air is applied to the bellows-shaped elements 39 and 40 via the pipes 41 and 42, and the walls 35 and 36 of the elements 39 and 40 are brought into contact with the surfaces 21b, 22b and 21c, 22c of the deflection electrodes 21 and 22, the shape of which they easily follow , thus defining the tunnel 31.
- the lateral shape of the deflection electrodes makes it possible to guide the walls 35 and 36 and automatically compensates for any misalignment resulting from the withdrawal of the walls when the air contained in the bellows-shaped elements is expelled 39 and 40.
- the pipes 41 and 42 must penetrate into the cavity 27 at a point such that they do not create any turbulence of the air introduced into the tunnel 31 through the intake orifice 30.
- filters or filters screens such as those shown in 17 and 18 can be used to reduce turbulence and create a laminar air flow in tunnel 31 as far as possible.
- the device of the present invention therefore makes it possible to move the walls of the tunnel through which the ink droplets and the air flow of the suction device pass so as to prevent ink from contaminating said walls during the setting up. on and off of the printer.
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Ink Jet (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/032,424 US4260996A (en) | 1979-04-23 | 1979-04-23 | Aspirated ink jet printer head |
US32424 | 1979-04-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0017757A1 true EP0017757A1 (de) | 1980-10-29 |
Family
ID=21864897
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80101299A Withdrawn EP0017757A1 (de) | 1979-04-23 | 1980-03-13 | Schreibkopf mit Ansaugung für Tintenstrahldrucker |
Country Status (5)
Country | Link |
---|---|
US (1) | US4260996A (de) |
EP (1) | EP0017757A1 (de) |
JP (1) | JPS55142667A (de) |
CA (1) | CA1137537A (de) |
IT (1) | IT1149224B (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6505922B2 (en) * | 2001-02-06 | 2003-01-14 | Eastman Kodak Company | Continuous ink jet printhead and method of rotating ink drops |
US6565182B1 (en) * | 2002-01-31 | 2003-05-20 | Hewlett-Packard Development Company, L.P. | Aerodynamic fairing structure for inkjet printing |
US7918530B2 (en) * | 2006-02-03 | 2011-04-05 | Rr Donnelley | Apparatus and method for cleaning an inkjet printhead |
US7458677B2 (en) * | 2006-06-20 | 2008-12-02 | Eastman Kodak Company | Reduction of turbulence within printing region of inkjet printer heads |
US20090021542A1 (en) * | 2007-06-29 | 2009-01-22 | Kanfoush Dan E | System and method for fluid transmission and temperature regulation in an inkjet printing system |
US8585179B2 (en) * | 2008-03-28 | 2013-11-19 | Eastman Kodak Company | Fluid flow in microfluidic devices |
US8540351B1 (en) * | 2012-03-05 | 2013-09-24 | Milliken & Company | Deflection plate for liquid jet printer |
US8888208B2 (en) | 2012-04-27 | 2014-11-18 | R.R. Donnelley & Sons Company | System and method for removing air from an inkjet cartridge and an ink supply line |
CN108778753B (zh) | 2016-03-04 | 2020-04-21 | R.R.当纳利父子公司 | 打印头维护台及其操作方法 |
CN207291314U (zh) | 2016-05-09 | 2018-05-01 | R.R.当纳利父子公司 | 油墨供应单元 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3717875A (en) * | 1971-05-04 | 1973-02-20 | Little Inc A | Method and apparatus for directing the flow of liquid droplets in a stream and instruments incorporating the same |
FR2197343A5 (de) * | 1972-09-25 | 1974-03-22 | Ibm | |
FR2236166A1 (de) * | 1973-07-02 | 1975-01-31 | Hertz Carl | |
FR2246396A1 (de) * | 1973-10-06 | 1975-05-02 | Agfa Gevaert Ag | |
US4017869A (en) * | 1974-07-13 | 1977-04-12 | Agfa-Gevaert, A.G. | Ink recorder for the jet-ink-process |
FR2374169A1 (fr) * | 1972-11-21 | 1978-07-13 | Ibm | Aspirateur de gouttelettes dans une imprimante a jet d'encre |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4097872A (en) * | 1976-12-20 | 1978-06-27 | International Business Machines Corporation | Axial droplet aspirator |
US3839721A (en) * | 1973-06-27 | 1974-10-01 | Ibm | Device for retention of ink jet nozzle clogging and ink spraying |
US4160982A (en) * | 1978-03-24 | 1979-07-10 | A. B. Dick Company | Anti-dispersion accumulator for ink jet printing system |
-
1979
- 1979-04-23 US US06/032,424 patent/US4260996A/en not_active Expired - Lifetime
-
1980
- 1980-02-05 CA CA000345121A patent/CA1137537A/en not_active Expired
- 1980-02-05 JP JP1213480A patent/JPS55142667A/ja active Pending
- 1980-03-13 EP EP80101299A patent/EP0017757A1/de not_active Withdrawn
- 1980-03-18 IT IT20727/80A patent/IT1149224B/it active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3717875A (en) * | 1971-05-04 | 1973-02-20 | Little Inc A | Method and apparatus for directing the flow of liquid droplets in a stream and instruments incorporating the same |
FR2197343A5 (de) * | 1972-09-25 | 1974-03-22 | Ibm | |
FR2374169A1 (fr) * | 1972-11-21 | 1978-07-13 | Ibm | Aspirateur de gouttelettes dans une imprimante a jet d'encre |
FR2236166A1 (de) * | 1973-07-02 | 1975-01-31 | Hertz Carl | |
FR2246396A1 (de) * | 1973-10-06 | 1975-05-02 | Agfa Gevaert Ag | |
US4017869A (en) * | 1974-07-13 | 1977-04-12 | Agfa-Gevaert, A.G. | Ink recorder for the jet-ink-process |
Non-Patent Citations (2)
Title |
---|
IBM TECHNICAL DISCLOSURE BULLETIN, Vol. 19, No. 6, Novembre 1976, page 2037 New York, U.S.A. R.E. PELKIE et al.: "Ink jet vacuum gutter" * Article en entier * * |
IBM TECHNICAL DISCLOSURE BULLETIN, Vol. 19, No. 8, Janvier 1977, pages 3216-3217New York, U.S.A. K.A. KRAUSE: "Ink jet head" * Page 3217 en entier * * |
Also Published As
Publication number | Publication date |
---|---|
US4260996A (en) | 1981-04-07 |
JPS55142667A (en) | 1980-11-07 |
IT1149224B (it) | 1986-12-03 |
CA1137537A (en) | 1982-12-14 |
IT8020727A0 (it) | 1980-03-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0017757A1 (de) | Schreibkopf mit Ansaugung für Tintenstrahldrucker | |
US5757406A (en) | Negative pressure ink delivery system | |
EP0893141B1 (de) | Überdrucklüftungsvorrichtung für Gasmaske | |
FR2585289A1 (fr) | Appareil d'enregistrement par jet d'encre et son dispositif d'alimentation en encre | |
JPH0924698A (ja) | インクジェットプリンタ・プロッタ | |
CA2027615C (fr) | Tete d'impression a jet d'encre et procede de mise en oeuvre de cette tete destinee notamment a l'impression de caracteres de grandes dimensions | |
FR2799689A1 (fr) | Cartouche a encre pour imprimante a jet d'encre | |
FR2727055A1 (fr) | Cartouche a reservoir d'encre, appareil d'enregistrement et systeme et procede de montage de la cartouche | |
US7815297B2 (en) | Ink jet recording head and ink jet recording apparatus having a plurality of ink flow paths | |
EP0014918A1 (de) | Vorrichtung zum Übertragen von Tintentröpfchen auf einen Aufzeichnungsträger | |
US20010022603A1 (en) | Liquid pressure supply apparatus and liquid discharge recording apparatus using the same | |
FR2814395A1 (fr) | Procede et dispositif de nettoyage de buses pour imprimantes a jet d'encre, et tete d'impression et imprimante integrant un tel dispositif | |
JP2001191557A (ja) | インクジェット式記録装置 | |
US6799843B2 (en) | Method of manufacturing structural body, liquid tank and ink jet printing apparatus, and an ink jet printing apparatus | |
JP6187357B2 (ja) | 液体吐出装置、液体カートリッジ、及び、液体吐出システム | |
FR2888289A1 (fr) | Dispositif d'injection d'additif liquide dans le circuit d'alimentation en carburant d'un moteur a combustion interne de vehicule automobile | |
JP2008207429A (ja) | 流体収容袋 | |
JP3845999B2 (ja) | インクカートリッジ | |
EP0022391A1 (de) | Gegenüber Beschleunigungen beständige kryostatische Vorrichtung | |
FR2923410A1 (fr) | Dispositif de recuperation d'encre pour station de maintenance | |
JP3347690B2 (ja) | インクジェット記録装置、インク供給装置、およびインク供給方法 | |
FR2469284A1 (fr) | Tete imprimante pour machine imprimante a jet d'encre munie d'un dispositif de ventilation pour la recuperation des brouillards d'encre | |
JP4178012B2 (ja) | トナー収納容器、それを用いた画像形成装置及び画像形成方法 | |
FR2618727A1 (fr) | Imprimantes a jet d'encre comprenant un collecteur d'aspiration et un collecteur connecte a un reservoir de stockage de gaz et vapeurs comprimes | |
KR101790653B1 (ko) | 액체 팩과 그 제조 방법 및 이를 구비하는 잉크 카트리지 및 프린터 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): DE FR GB |
|
17P | Request for examination filed |
Effective date: 19801203 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19830113 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: WITTWER, ALVIN, LEROY |