EP0007394A1 - Dispositif de contrôle de l'alimentation en encre dans une imprimante mécanique à jet de fluide - Google Patents

Dispositif de contrôle de l'alimentation en encre dans une imprimante mécanique à jet de fluide Download PDF

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Publication number
EP0007394A1
EP0007394A1 EP79101483A EP79101483A EP0007394A1 EP 0007394 A1 EP0007394 A1 EP 0007394A1 EP 79101483 A EP79101483 A EP 79101483A EP 79101483 A EP79101483 A EP 79101483A EP 0007394 A1 EP0007394 A1 EP 0007394A1
Authority
EP
European Patent Office
Prior art keywords
writing
valve
compressed air
storage container
writing medium
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.)
Granted
Application number
EP79101483A
Other languages
German (de)
English (en)
Other versions
EP0007394B1 (fr
Inventor
Hans-Dieter Rösel
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.)
JS Staedtler GmbH and Co KG
Original Assignee
JS Staedtler GmbH and Co KG
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 JS Staedtler GmbH and Co KG filed Critical JS Staedtler GmbH and Co KG
Publication of EP0007394A1 publication Critical patent/EP0007394A1/fr
Application granted granted Critical
Publication of EP0007394B1 publication Critical patent/EP0007394B1/fr
Expired 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
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7904—Reciprocating valves
    • Y10T137/7922—Spring biased
    • Y10T137/7927—Ball valves

Definitions

  • the invention relates to a device for controlling the supply of writing medium to the writing device of mechanical writers with a compressed air source acting on the liquid surface of the writing medium storage container.
  • Such devices are intended to ensure that a sufficient amount of writing medium is available at the start of the writing process, that the supply of the writing medium is ensured during the entire writing process, variously also providing regulation of the writing medium supply depending on the writing speed, and that Completion of the writing process reliably prevents the supply of writing materials and thus drops forming on the writing device, for example consists of a tube recorder, is prevented.
  • the object of the invention is to provide a device for controlling the supply of writing materials, which is characterized by the use of relatively simple components and is accordingly inexpensive to produce, but which, on the other hand, also ensures reliable control of the supply of writing materials with a high level of operational reliability and largely maintenance-free.
  • the invention is implemented in such a way that an electromechanically operated three-way valve for venting, preferably a quick vent valve, is provided between the compressed air source and the writing medium storage container.
  • a valve has two switching positions, in one of which the compressed air source is connected to the writing medium storage container and the outlet is closed, while in the other the line to the compressed air source is interrupted and the line to the storage container is connected to the atmosphere, ie is vented.
  • the valve is brought into the first position, while when it is finished it is regulated into the second position.
  • the ventilation line is very large in cross-section compared to the other lines, so that the ventilation takes place very quickly and at a high flow rate, which leads to a decrease in the static pressure in the vented line to a certain amount below that of the external pressure.
  • This resulting negative pressure although relatively low, is nevertheless sufficient to move towards the writing medium via the writing medium storage container. act and at the moment of the completion of the writing a retraction of the writing column in the writing device and thus to reliably prevent the formation of drops.
  • the outlet valve is preferably not spring-loaded, but is brought into the closed position by the negative pressure, where it is held under the influence of a defined frictional force until sufficient writing medium pressure again causes it to open.
  • an electromechanically actuated shut-off valve between the compressed air source and the writing medium storage container and an outlet valve acted upon by a spring in the closing direction are provided, the valve body of the outlet valve being at least longitudinal part of its stroke is sealingly guided.
  • the valve downstream of the compressed air source is in this case a simple shut-off valve, ie it is opened at the start of the writing process, so that the compressed air source is connected to the writing medium storage container, and closed when the writing process is completed.
  • the spring-loaded outlet valve also opens against the spring force when a writing medium pressure builds up when the shut-off valve is open, and permits the outflow of writing medium. If the shut-off valve is closed and thus the pressure on the writing medium is interrupted, the spring of the outlet valve results in the valve body back to the closed position back, wherein, as it is guided sealingly, splashing on the intermediate P exhaust valve and writing means output remaining write center column suction is applied.
  • This embodiment also does not require an additional device for generating a negative pressure.
  • the outlet valve is advantageously arranged directly on the writing device. This achieves maximum effectiveness of the valve, the simple design of the valve making it so light that it does not significantly increase the inertia of the writing device, thereby reducing its mobility.
  • a controllable throttle valve between the compressed air source and the writing device.
  • a throttle valve can be used to regulate the pressure on the writing medium and thus the amount of writing medium flowing out.
  • the throttle valve is controlled by hand according to the expected writing speed.
  • an electromechanically controllable throttle valve and a regulating device for regulating the throttle valve are provided as a function of the respective writing speed.
  • the rule direction can regulate the throttle valve, for example, as a function of the speed of the servomotors causing the relative movement between the writing pad and the writing device. In this way, a constant line width is guaranteed during the entire writing process.
  • an electromechanical device for lifting and placing the writing device and an electrical coupling for its simultaneous actuation with the valve between the compressed air source and the writing device can be provided. This means that through the same switching process, e.g. the depositing of the writing device at the beginning of the writing process causes the valve downstream of the compressed air device to be opened. Conversely, this valve is closed when the writing device is lifted from the surface.
  • a compressed air source 1 is provided, at the output of which a pressure gauge 2 is arranged. This is connected via the compressed air line 3 to a reducing valve 4 for pressure control, which in turn is connected via line 5 to the one connection 6 of the three-way valve 7. Another port 8 of the three-way valve 7 is connected via line 9 to the writing medium reservoir 10.
  • the third connection 11 of the three-way valve 7 leads to the outside.
  • the three-way valve 7 can be controlled via a control device 12 as a function of the operating state of the writing device 13, ie depending on whether the writing device 13 is in the writing or in the rest position. If the writing device 13 is in the rest position, port 8 is connected to port 11 of the three-way valve 7, ie the line 9 is vented.
  • port 6 is connected to port 8 of the three-way valve 7, so that compressed air from the compressed air source 1 can act on the surface of the writing medium 14 in the writing medium storage container 10, which is hermetically sealed from the outside.
  • an outlet valve 16 is switched on, which opens automatically under the pressure of the writing medium and is closed again by the static negative pressure which arises when the line 9 is quickly vented via the three-way valve 7 and which propagates via the writing medium 14 and is held in this closed position with defined friction.
  • the valve between lines 5 and 9 is a check valve, which is also controlled by the control device 12, in such a way that it is open in the writing position of the writing device or closed in its rest position.
  • the outlet valve 18 is arranged directly on the writing device 13, which is lowered into the writing position by means of an electromechanical device 21 and raised in the rest position. The actuation of this lifting and lowering device 21 is electrically coupled to the control of the valve 17 via the control device 12.
  • the outlet valve 18 has a valve body 23 acted upon by a spring 22 in the blocking direction. When the valve 17 is open, the outlet valve 18 opens due to the pressure exerted by the writing means 14 against the spring force, so that writing means 14 can escape. When valve 17 closes, outlet valve 18 closes due to the spring force automatically.
  • the outlet valve 18 is approximately as shown in F ig. 3 is shown schematically.
  • a spring 22 acts on the spherical valve body 23 and presses it in the direction of the closed position.
  • the valve body 23 is sealingly guided along its stroke.
  • the valve body 23 Under the pressure of the writing means 14, the valve body 23 is brought from the position shown on the left in FIG. 3 to the position shown on the right in FIG. 3, whereby a free connection between the inlet and outlet channels 24 and 25 is established, that is, writing means 14 for Writing device 13 can flow.
  • the spring 22 pushes the valve body 23 up again, a vacuum being generated below it by the sealing guidance of the valve body 23, which results in the writing column 13 still located in the writing device 13 being sucked back.
  • a reducing valve 4a downstream of the compressed air source 1 serves to reduce the pressure to the required operating pressure.
  • the throttle valve 4 is designed as a throttle check valve and prevents, among other things. through flow control at the start of the writing process, an excessively sudden build-up of pressure and the resulting drop formation at the tip of the writing device.
  • the device according to the invention can, accordingly, also be used when using multiple writing heads for different line widths or colors.

Landscapes

  • Ink Jet (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Recording Measured Values (AREA)
  • Pens And Brushes (AREA)
EP79101483A 1978-06-23 1979-05-15 Dispositif de contrôle de l'alimentation en encre dans une imprimante mécanique à jet de fluide Expired EP0007394B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2827718A DE2827718C3 (de) 1978-06-23 1978-06-23 Vorrichtung zum Steuern des Schreibmittelzulaufs zur Schreibeinrichtung mechanischer Schreiber
DE2827718 1978-06-23

Publications (2)

Publication Number Publication Date
EP0007394A1 true EP0007394A1 (fr) 1980-02-06
EP0007394B1 EP0007394B1 (fr) 1981-09-30

Family

ID=6042622

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79101483A Expired EP0007394B1 (fr) 1978-06-23 1979-05-15 Dispositif de contrôle de l'alimentation en encre dans une imprimante mécanique à jet de fluide

Country Status (4)

Country Link
US (1) US4325072A (fr)
EP (1) EP0007394B1 (fr)
JP (1) JPS605199B2 (fr)
DE (1) DE2827718C3 (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56125392U (fr) * 1980-02-25 1981-09-24
JPS56125393U (fr) * 1980-02-25 1981-09-24
JPS56125394U (fr) * 1980-02-25 1981-09-24
JPS57137163A (en) * 1981-02-18 1982-08-24 Sanyo Electric Co Ltd Ink jet recording device
DE3024678C2 (de) * 1980-06-30 1982-11-25 Fa. J.S. Staedtler, 8500 Nürnberg Vorrichtung zur Zuführung un Steuerung des Schreibmittels für die Schreibeinheit automatischer Schreib- oder Zeichen-Maschinen
DE8029188U1 (de) * 1980-11-03 1981-03-12 Fa. J.S. Staedtler, 8500 Nürnberg Schreibmitteleinheit fuer automatische schreib- oder zeichenmaschine
US4412232A (en) * 1982-04-15 1983-10-25 Ncr Corporation Ink jet printer
JPS59114992U (ja) * 1983-01-24 1984-08-03 東洋電機製造株式会社 自動製図機用インクペン加圧装置
DE3406662A1 (de) * 1984-02-24 1985-09-12 Fa. J.S. Staedtler, 8500 Nürnberg Ausgabeeinheit fuer automatisch arbeitende registrier-, schreib- oder zeichenvorrichtungen sowie verfahren zu deren anwendung
JPS6255371U (fr) * 1985-09-27 1987-04-06
ATE82196T1 (de) * 1987-03-13 1992-11-15 Jan Slomianny Tintensystem fuer tintenstrahlmatrixdrucker.
US5005296A (en) * 1989-09-15 1991-04-09 Gerber Garment Technology, Inc. Plotter and ink pressurizing pump
US5101219A (en) * 1990-04-12 1992-03-31 Gerber Garment Technology, Inc. Long life pen and ink supply unit for x,y plotter and the like and related method of use
US5159348A (en) * 1990-10-29 1992-10-27 Xerox Corporation Ink jet printing apparatus
DE69306295T2 (de) * 1992-04-24 1997-04-03 Hewlett Packard Co Regelung des Gegendrucks beim Farbstrahldrucken
GB9601947D0 (en) * 1996-01-31 1996-04-03 Neopost Ltd Ink jet printing device
US7311389B1 (en) 2005-02-09 2007-12-25 Tarry Pidgeon Ink maintenance system for ink jet cartridges
US8926333B2 (en) * 2013-03-15 2015-01-06 Simnext, Llc Device, system, and method for simulating blood flow

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038667A (en) * 1976-04-28 1977-07-26 Gould Inc. Ink jet ink supply system
US4042937A (en) * 1976-06-01 1977-08-16 International Business Machines Corporation Ink supply for pressurized ink jet
DE2643566A1 (de) * 1976-09-28 1978-03-30 Olympia Werke Ag Duesendrucker, insbesondere fuer ein tintenspritz-schreibwerk

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1151230A (en) * 1913-04-09 1915-08-24 Dudley John Wilson Valve.
US1709926A (en) * 1923-12-15 1929-04-23 American Telephone & Telegraph Apparatus and method for transmitting pictures
GB554308A (en) * 1941-12-22 1943-06-29 Arnold Parker Hill Improvements in and relating to the inking mechanism of electrical recording apparatus
GB707894A (en) * 1951-03-12 1954-04-28 Kelvin & Hughes Ltd Improvements in or relating to pens for recorder instruments
US2951894A (en) * 1957-06-28 1960-09-06 Ralph M Hirsch Facsimile recording system
US3065886A (en) * 1960-10-24 1962-11-27 Jr Harvey D Smalley Ink dispensing apparatus
US3185991A (en) * 1961-02-02 1965-05-25 Victor Comptometer Corp Ink supply system for recording apparatus
GB1005326A (en) * 1963-06-24 1965-09-22 Ibm Improvements in fluid dispensing devices
US3371350A (en) * 1966-09-09 1968-02-27 Hewlett Packard Co Ink supply system with pressure regulating diaphragm
DE2311383C2 (de) * 1973-03-08 1975-04-30 Olympia Werke Ag, 2940 Wilhelmshaven Anordnung zum Reduzieren von Druckanstiegen und -abfallen in der Schreibflüssigkeit eines Tintenspritz-Schreibwerkes
JPS5928471B2 (ja) * 1976-12-17 1984-07-13 シャープ株式会社 液体ジエツト供給機構

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038667A (en) * 1976-04-28 1977-07-26 Gould Inc. Ink jet ink supply system
US4042937A (en) * 1976-06-01 1977-08-16 International Business Machines Corporation Ink supply for pressurized ink jet
DE2643566A1 (de) * 1976-09-28 1978-03-30 Olympia Werke Ag Duesendrucker, insbesondere fuer ein tintenspritz-schreibwerk

Also Published As

Publication number Publication date
JPS553996A (en) 1980-01-12
US4325072A (en) 1982-04-13
JPS605199B2 (ja) 1985-02-08
DE2827718B2 (de) 1980-11-20
EP0007394B1 (fr) 1981-09-30
DE2827718C3 (de) 1984-11-08
DE2827718A1 (de) 1980-01-03

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