US3848118A - Jet printer, particularly for an ink ejection printing mechanism - Google Patents

Jet printer, particularly for an ink ejection printing mechanism Download PDF

Info

Publication number
US3848118A
US3848118A US33868373A US3848118A US 3848118 A US3848118 A US 3848118A US 33868373 A US33868373 A US 33868373A US 3848118 A US3848118 A US 3848118A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
chamber
jet printer
defined
inlet
nozzle
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
Inventor
E Rittberg
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.)
A E G OLYMPIA AG
Original Assignee
Olympia Werke 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
Grant date

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/015Ink jet characterised by the jet generation process
    • B41J2/04Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/055Devices for absorbing or preventing back-pressure
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/206Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]

Abstract

In a jet printer including a compression chamber having one end provided with a discharge nozzle via which printing ink is propelled onto the surface of paper to be printed, and its other end communicating with an ink reservoir, the volume of the compression chamber being made to vary by an exciter system, a fluidic component having a non-reciprocal flow characteristic is disposed in the ink flow path between the reservoir and the chamber to cause the resistance to flow from the chamber toward the reservoir to be higher than in the opposite direction.

Description

United States Patent Rittberg [4 1 Nov. 12, 1974 1 JET PRINTER, PARTICULARLY FOR AN 3,281,860 10/1900 Adams et 111 230/102 x EJECTION PRINTING MECHANISM 3.554.209 1/1971 Brown et a1. 137/841 X 3.700.169 10/1972 Naydan 239/102 X 1 lnvehtorl Y Rittberg, Wilhelmshuven. 3,747,120 7/1073 Stennc 340 75 Germany 73 Assignee; Olympia w AG, Primary Examiner-M. Henson Wood, .Ir.

wilhelmshaven Germany Assistant Examiner.]0hn J. LOVe Attorney, Agent, or Firm-Spencer & Kaye [22] F11ed: Mar. 5, 1973 1 1 pp 19013384583 [57 ABSTRACT In a jet printer including a compression chamber hav- [30] Foreign Application Priority Data ing one end provided with a discharge nozzle via Mar. 4, 1972 Germany 2210512 which Priming ink is Propelled omo the surface of paper to be printed, and its other end communicating [52 us. c1 239/101, 239/102, 137/803 with an ink reservoir, the volume of the compression [51] Int. Cl B05b l/08 Chamber being made to y y an excite y a [58] Field of Search 239/4, 101, 102; 346/75; fluidic p having a "On-reciprocal flow 137/ 33 341 acteristic is disposed in the ink flow path between the reservoir and the chamber to cause the resistance to [56] References Cited flow from the chamber toward the reservoir to be than in the OPPOSitfi direction.

3,191,623 6/1965 Bowles 137/833 12 Claims, 6 Drawing Figures PATENTEL, rzsv 1 21974 sum 20F 3 I J 107 10a PATENI HOV 1 21974 SHEET 3 OF 3 JET PRINTER, PARTICULARLY FOR AN INK I EJECTION PRINTING MECHANISM BACKGROUND OF THE INVENTION The present invention relates to a jet printer, particularly for an ink ejection printing mechanism, including a chamber whose end facing the paper to be printed is provided with a discharge nozzle, whose other end is provided with an intake for the printing liquid coming from a reservoir, and whose volume can be varied by temporary pressure surges produced by an exciter system.

Devices of this type are known in which the ink, which is under pressure in an ink reservoir, is transferred to a tube having a discharge nozzle. with the aid of electromechanical transducers, the tube, is subjected to periodic elongations, and thus constrictions in diameter, which cause the ink to exit from the housing in the form of ink droplets. The electromechanical transducers here consist of piezoelectric quartz crystals which are polarized so that they axially contract or ex pand when a voltage is applied.

The structure of this known device is very complicated and requires, inter alia, an arrangement for producing an excess pressure. Moreover, since the stream of ink droplets can not be abruptly cut off, it must be electrically charged so that it can be deflected when no printing is to take place. Thus an additional deflection system must be provided similar to that used for the electron beam'in cathode-ray tubes.

An apparatus has been proposed for producing pressure pulses in a chamber filled with a liquid matter where the chamber, on the other hand, is closed off by a membrane and, on the other hand, is in communication with a discharge channel and an intake channel for the printing liquid coming from a reservoir.

The volume in this chamber can be varied by driving the movable membrane by means of an electromechanical transducer. In conjunction with a hydrodynamic decoupling of the liquid streams at the discharge nozzle, individual ink droplets are produced in this manner. The drawback is here the complicated filling of the capillary chambers with liquid, which must take place in a vacuum. Moreover, the structure is still rather complicated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a jet printer in which the refilling of the capillary chambers with liquid can take place without the need of a vacuum, which is extremely dependable, and which permits rapid operation with uniform printing quality.

, posite direction. The non-reciprocal, or diode effect of these fluidic components is produced only by physical effects of the stream deflection or by mutual influence of the liquid streams. Such fluidic components have been found to permit a simple and compact structure for an ink ejection head.

In an advantageous embodiment, the fluidic component is a nozzle impact plate system at the intake side. The fluidic component can also be made to produce a diode effect through a mutual influencing of liquid streams in that the component is provided with two channels which end at one side in the discharge nozzle and at the other side in an intake channel to the reservoir, which channel is perpendicular to the abovementioned two channels. The opening of the channels into the intake channel may either be perpendicular or tangential and the channels maybe directed toward one another. The particular advantage of these fluidic components is that they are particularly simple and robust in structure. They also permit refilling the reservoir without a vacuum.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a second embodiment of the present invention, with two channels which open into the intake channel in a perpendicular direction.

FIG. 3 is a view similar to that of FIG. 2, but with mutually tangentially directed channel openings.

FIG. 4 is a cross-sectional view of a third embodiment.

FIG. 5 is a detail view, to an enlarged scale of part of the device of FIG. 4.

FIG. 6 is a plan view of the embodiment shown in FIG. 4.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment shown in FIG. 1 includes an axially symmetrical housing 1 whose axis is horizontal in the drawing and whose axial end facing the printed paper is provided with a nozzle body 3 with a discharge nozzle 5. This discharge nozzle 5 is preceded by a chamber 7 into which an elastic tube 9 is inserted. The other end of this tube 9 is connected with a chamber 11 of a second nozzle body 13 which is kept at a distance from the first nozzle body 3 in housing 1 by a spacer ring 15. The chambers 9, II are connected with chamber 19 constituting in the space beween the cylindrical body 40 and the elastic tube 9.

In the space 17 between the nozzle bodies 3 and 13 the elastic wall constituting the tube 9 is enclosed by a piezotoroid 21 serving as the exciter system. Th elastic wall 9 and the exciter system may of course also have different structures.

The chamber 11 in nozzle body 13 includes an intake nozzle 23 which is in communication with a reservoir 29 via an intermediate chamber 25 and a connecting channel 27. The intermediate chamber 25 is disposed between the nozzle body 13 and an end piece 39 spaced from nozzle body 13 by a distance defined by a spacer ring 37. In the intermediate chamber 25 the end piece 39 has a protrusion in the form of an impact plate close to and facing intake nozzle 23.

If a signal source 35 transmits voltage pulses through line wires 31 and 33 to the piezotoroid 21, the latter contracts radially due to its polarization. Thus mechanical pressure pulses are given to the elastic tube so that the volume in the compression chambers 7, ll, 19 is reduced. Because of the nozzle impact plate systems 23, 41 constituting the fluidic component on the intake side of the compression chamber the flow resistance is greater at the intake side of the compression chamber when fluid is displaced than on the outlet side of the compression chambers 7, 11, 19, at which the discharge nozzle 5 is disposed.

When the piezotoroid 21 swings back into its starting position a subatmospheric pressure is produced in the compression chambers 7, ll, 19 which causes ink to be sucked through the intake nozzle 23 from the reservoir 29 via channel 27 and intermediate chamber 25. During this operation, the flow resistance on the outlet side 5 of the compression chamber is greater than on the intake side 23. During this suction phase the capillaryforce of the ink in the discharge nozzle 5 must be great enough that no air is sucked into the compression chambers 7, 11, 19. Coaction of the nozzle impact plate arrangements 23, 41 at the intake side with the discharge nozzle 5 on the outlet side thus produces a hydrodynamic valve.

In order to achieve a high operating speed, an advantageous embodiment of the present invention, as shown in FIG. 1, includes a cylindrical body 40 which is fixed to body 13, by suitable means, such as circumferentially spaced, radially projecting struts, and which is arranged in the elastic tube 9 in such a way as to define an annular compression chamber therewith. This produces a high volume change or compression ratio for the compression chamber, this ratio being determined by the chamber volume corresponding to the starting position and the contracted position, respectively, of piezotoroid 21.

The arrangement of the nozzle impact plate system on the inlet side and the discharge nozzle at the outlet side of compression chambers 7, 11, 19 produces a jet printer which is simple in structure and operation and in which it is possible to fill the capillary chambers without maintaining a vacuum.

The present invention is in no way limited to the embodiment of FIG. 1. Rather, deviations from the embodiment shown in FIG. 1 are possible within the scope of the invention, these deviations being represented by structural modifications which conform to the required conditions and dimensions.

Thus, for example, the fluidic component at the intake of the chamber may include two channels 43 and 45 as shown in FIG. 2, each of which has an inlet end which opens into a supply channel 51 which is perpendicular to these channels and which leads to a reservoir (not shown).

The other ends of the channels 43 and 45 are in communication with a discharge nozzle 57 via respective compression chambers 52 and 54. The inlet opening of the channels 43 and 45 may here be perpendicular to the supply channel as shown in FIG. 2, so that the diode effect is created by a nozzle impact plate arrangement.

On the other hand, in the embodiment shown in FIG. 3, channels 63 and 65 are arranged tangentially to one another and open into supply channel 61. The pressures are here compensated by the oppositely directed flows of the ink toward channel 61 in such a way that the ink in the compression chamber 62 and 64 is forced to flow in the direction of the discharge nozzle 67.

To produce ink droplets it is of course also sufficient to have only one compression chamber in communication with the discharge nozzle 57.

In the embodiments of FIGS. 2 and 3, the compression chambers 52, 54 and 62, 64 are formed of two channels which are parallel to each other between their ends. In these areas, the compression chambers 52, 54 and 62, 64 have elastic walls 53, 55 and 73, 75, respectively, the pair of walls of each chamber being disposed opposite one another and driven by a common oscillation exciter 56 or 66, which may be a piezocrystal. The compression chambers 52, 54 and 62, 64 may of course also be driven by separate exciter systems. In order to realize a valve effect on the intake side during the ejection of an ink droplet it is necessary for both exciter systems to be driven simultaneously.

FIGS. 4, 5 and 6 show an ink injection head for a printing mechanism including a cylindrical body 83 with a continuous fluid chamber 85. This fluid chamber 85 is covered by a plate 87 at the end facing the printing paper, the cover being provided with a discharge nozzle 89. The cylindrical body 83 is inserted into a base body 81 and permanently connected therewith, for example by a solder connection. The base body 81 is also permanently connected with a membrane 93 which is closely opposite the body 83 in order to form therewith a circular capillary chamber 95. The membrane 93 is part of a cover plate 91 and is arranged to be driven, or deflected by means of a piezoelectric crystal 97 in order to displace a volume of liquid from the capillary chamber 95.

On its periphery the capillary chamber has a contiguous slit opening 99 which communicates with annular inlet channels 101, 103. These inlet channels 101, 103 include interconnected annular channels 101 and 103 which are bounded by bodies 81 and 83 and by the plane 104, between body 83 and cover plate 91 and plane 106 between bodies 81 and 83.

Between these annular channels 101 and 103 there is disposed an impact plate constituted by a protrusion 107 in base body 81 and located closely opposite the slit opening 99. The annular channel 101 in cover plate 91 is connected with annular channel 103 via a plurality of bores 109 which are distributed around the periphery of the assembly. Furthermore, the annular channel 103 is in communication with an ink reservoir (not shown) via a connecting line 111. The slit opening 99 has the shape of a nozzle in the direction toward intake channels 101 and 103.

The operation of the arrangement of FIGS. 4-6 is as follows:

If a signal source sends a voltage pulse to the piezocrystal 97, the crystal contracts radially due to its polarization and bends through toward the inside. This produces a pressure pulse which is transmitted to the liquid in the capillary chamber 95 and in chamber 85.

The nozzle impact plate system 99, 105 forms a fluidic component and is so designed that this pressure increase in the compression chambers 85, 95 will not cause liquid to be propelled back to the reservoir. Thus the pressure wave in the liquid is advantageously directed toward the outlet nozzle 89, a single droplet being ejected from the outlet nozzle 89 with each pressure pulse.

When the piezocrystal 95 swings back to its starting position, a subatmospheric pressure is produced in compression chambers 85, 95 which causes liquid to be drawn from the reservoir through line 111 and annular channels 101, 103 and to quickly flow into capillary chamber 95.

In order to permit favorable replenishment conditions, the slit opening 99 is disposed in line with the center of impact plate 105, the ratio between the height of the opening 99 and the height of the impact plate 105 both in the direction of the axis of element 83, lying between /2 and l/2.5. During the time when the voltage pulse drops or returns to zero the direction of the fluid stream in the connection channel between the opening 99 and the channels 101. 103 is reversed, the fluid can now sucked in the compression chambers 85, 95 without an affective flow resistance.

On the other hand, these geometric dimensions also establish an effective flow resistance toward the reservoir for the liquid when a droplet is to be ejected from the outlet nozzle 89.

The ejection head consists of simple cylindrical parts and can thus be easily installed. All surfaces of the ejection head which must have close tolerances lie on planes of separation between members. An ejection head having a plurality of ejection units in a single plane also requires only a few simple operating steps for its fabrication.

It will be understood that the above description of the present invention is susceptible to various modifications, changes and adaptations, and the same are intended to be comprehended within the meaning and range of equivalents of the appended claims.

I claim:

1. In a jet printer including a compression chamber having one end, arranged to face the surface to be printed, provided with a discharge nozzle and its other end provided with an inlet for the printing liquid coming from a reservoir, and an exciter system arranged to vary the volume of the chamber in brief pressure surges, the improvement comprising a fluidic component constituted by a nozzle and an associated impact plate disposed at the printing liquid inlet to said chamber and constituting a non-reciprocal flow element presenting a resistance to flow of liquid which has a higher value for flow in the direction from said chamber toward the reservoir than in the opposite direction.

2. Jet printer as defined in claim 1, further comprising a liquid intake channel between said other end of said chamber and the reservoir and wherein said nozzle is disposed at said other end of said chamber and has the form of an intake nozzle, and said impact plate is disposed closely opposite said nozzle with the space therebetween constituting part of said intake channel.

3. Jet printer as defined in claim 1, further comprising a supply channel connected to the reservoir and wherein: said fluidic component comprises two channels each having an inlet end opening into said supply channel; and said compression chamber is constituted by two compression channels each communicating with a respective one of said fluidic component channels, said compression channels being joined together at said discharge nozzle.

4. Jet printer as defined in claim 3, wherein said inlet ends of said fluidic component channels open perpendicularly into said supply channel.

5. Jet printer as defined in claim 3, wherein said inlet ends of said fluidic component channels open tangentially into said supply channel in respectively opposite directions such that said inlet ends point toward one another.

6. Jet printer as defined in claim 3, wherein each of said compression channels has an elastic wall portion arranged to coact with said exciter system in order to produce a change in the volume of said compression channels.

7. Jet printer as defined in claim 1, wherein a portion of said compression chamber is constituted by an elastic tube and said exciter system comprises a piezotoroid enclosing said tube and arranged to contract said tube radially to vary the volume of said compression chamber.

8. Jet printer as defined in claim 7, further comprising a fixed cylindrical body disposed in, and spaced radially from the walls of, said tube to define therewith annular compression chamber region.

9. Jet printer as defined in claim 1, further comprising a cylindrical body in which said chamber is disposed in a manner such that the liquid flow path between said inlet and siad discharge nozzle is along the axis of said body;

a cover plate having a deflectable membrane associated with said exciter system, said membrane being disposed opposite an axial face of said body at the inlet end thereof and being spaced from said axial face to define a circular capillary channel therewith, said channel constituting the printing liquid inlet of said chamber and having an inlet opening in the form of a slit extending around the entirety of its circular outer periphery; and

means defining an annular liquid intake channel communicating between said inlet opening and the reservoir; and

wherein said inlet opening constitutes said nozzle and said impact plate is a circular impact plate disposed in said intake channel facing said inlet opening.

10. Jet printer as defined in claim 9, wherein said inlet opening has the form of an annular nozzle.

11. Jet printer as defined in claim 9 wherein the impact surface of said impact plate has the form of a cylinder normal to, and centered on, the median plane of said circular capillary channel and the height of said plate is between 2 and 2.5 times the height of said inlet opening normal to such plane.

12. Jet printer as defined in claim 9, further comprising a base element having a hollow interior in which said cover plate and cylindrical body are disposed, said cover plate and cylindrical body being rigidly connected to said base element; and wherein said base element, said cover plate and said cylindrical body are formed to define said liquid intake channel between them, and said impact plate is constituted by a member integral with, and protruding into the hollow interior of, said base element.

Claims (12)

1. In a jet printer including a compression chamber having one end, arranged to face the surface to be printed, provided with a discharge nozzle and its other end provided with an inlet for the printing liquid coming from a reservoir, and an exciter system arranged to vary the volume of the chamber in brief pressure surges, the improvement comprising a fluidic component constituted by a nozzle and an associated impact plate disposed at the printing liquid inlet to said chamber and constituting a non-reciprocal flow element presenting a rEsistance to flow of liquid which has a higher value for flow in the direction from said chamber toward the reservoir than in the opposite direction.
2. Jet printer as defined in claim 1, further comprising a liquid intake channel between said other end of said chamber and the reservoir and wherein said nozzle is disposed at said other end of said chamber and has the form of an intake nozzle, and said impact plate is disposed closely opposite said nozzle with the space therebetween constituting part of said intake channel.
3. Jet printer as defined in claim 1, further comprising a supply channel connected to the reservoir and wherein: said fluidic component comprises two channels each having an inlet end opening into said supply channel; and said compression chamber is constituted by two compression channels each communicating with a respective one of said fluidic component channels, said compression channels being joined together at said discharge nozzle.
4. Jet printer as defined in claim 3, wherein said inlet ends of said fluidic component channels open perpendicularly into said supply channel.
5. Jet printer as defined in claim 3, wherein said inlet ends of said fluidic component channels open tangentially into said supply channel in respectively opposite directions such that said inlet ends point toward one another.
6. Jet printer as defined in claim 3, wherein each of said compression channels has an elastic wall portion arranged to coact with said exciter system in order to produce a change in the volume of said compression channels.
7. Jet printer as defined in claim 1, wherein a portion of said compression chamber is constituted by an elastic tube and said exciter system comprises a piezotoroid enclosing said tube and arranged to contract said tube radially to vary the volume of said compression chamber.
8. Jet printer as defined in claim 7, further comprising a fixed cylindrical body disposed in, and spaced radially from the walls of, said tube to define therewith annular compression chamber region.
9. Jet printer as defined in claim 1, further comprising a cylindrical body in which said chamber is disposed in a manner such that the liquid flow path between said inlet and siad discharge nozzle is along the axis of said body; a cover plate having a deflectable membrane associated with said exciter system, said membrane being disposed opposite an axial face of said body at the inlet end thereof and being spaced from said axial face to define a circular capillary channel therewith, said channel constituting the printing liquid inlet of said chamber and having an inlet opening in the form of a slit extending around the entirety of its circular outer periphery; and means defining an annular liquid intake channel communicating between said inlet opening and the reservoir; and wherein said inlet opening constitutes said nozzle and said impact plate is a circular impact plate disposed in said intake channel facing said inlet opening.
10. Jet printer as defined in claim 9, wherein said inlet opening has the form of an annular nozzle.
11. Jet printer as defined in claim 9 wherein the impact surface of said impact plate has the form of a cylinder normal to, and centered on, the median plane of said circular capillary channel and the height of said plate is between 2 and 2.5 times the height of said inlet opening normal to such plane.
12. Jet printer as defined in claim 9, further comprising a base element having a hollow interior in which said cover plate and cylindrical body are disposed, said cover plate and cylindrical body being rigidly connected to said base element; and wherein said base element, said cover plate and said cylindrical body are formed to define said liquid intake channel between them, and said impact plate is constituted by a member integral with, and protruding into the hollow interior of, said base element.
US3848118A 1972-03-04 1973-03-05 Jet printer, particularly for an ink ejection printing mechanism Expired - Lifetime US3848118A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19722210512 DE2210512C3 (en) 1972-03-04 1972-03-04
GB1280173A GB1408676A (en) 1972-03-04 1973-03-16 Jet printer

Publications (1)

Publication Number Publication Date
US3848118A true US3848118A (en) 1974-11-12

Family

ID=25762835

Family Applications (1)

Application Number Title Priority Date Filing Date
US3848118A Expired - Lifetime US3848118A (en) 1972-03-04 1973-03-05 Jet printer, particularly for an ink ejection printing mechanism

Country Status (2)

Country Link
US (1) US3848118A (en)
GB (1) GB1408676A (en)

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3940773A (en) * 1973-08-16 1976-02-24 Matsushita Electric Industrial Co., Ltd. Liquid droplet writing mechanism
US3941312A (en) * 1973-11-23 1976-03-02 Research and Development Laboratories of Ohno Company Limited Ink jet nozzle for use in a recording unit
US4032928A (en) * 1976-08-12 1977-06-28 Recognition Equipment Incorporated Wideband ink jet modulator
US4057807A (en) * 1976-01-15 1977-11-08 Xerox Corporation Separable liquid droplet instrument and magnetic drivers therefor
US4104645A (en) * 1975-10-28 1978-08-01 Xerox Corporation Coincidence ink jet
US4112433A (en) * 1975-11-21 1978-09-05 Xerox Corporation Meniscus dampening drop generator
US4115789A (en) * 1976-01-15 1978-09-19 Xerox Corporation Separable liquid droplet instrument and piezoelectric drivers therefor
US4199770A (en) * 1978-12-04 1980-04-22 Xerox Corporation Coincidence gate ink jet with increased operating pressure window
US4199769A (en) * 1978-12-04 1980-04-22 Xerox Corporation Coincidence gate ink jet with increased operating pressure window
US4201995A (en) * 1978-12-04 1980-05-06 Xerox Corporation Coincidence gate ink jet with increased operating pressure window
US4216477A (en) * 1978-05-10 1980-08-05 Hitachi, Ltd. Nozzle head of an ink-jet printing apparatus with built-in fluid diodes
US4223998A (en) * 1975-08-25 1980-09-23 Siemens Aktiengesellschaft Piezo-electric actuating element for recording heads
US4245227A (en) * 1978-11-08 1981-01-13 International Business Machines Corporation Ink jet head having an outer wall of ink cavity of piezoelectric material
US4245225A (en) * 1978-11-08 1981-01-13 International Business Machines Corporation Ink jet head
US4278983A (en) * 1979-05-23 1981-07-14 Gould Inc. Ink jet writing device
US4291316A (en) * 1975-06-03 1981-09-22 Ricoh Co., Ltd. System for driving ink drop generator of ink-jet printer
US4326205A (en) * 1976-10-12 1982-04-20 Xerox Corporation Coincidence fluid displacement and velocity expression of droplet
US4331964A (en) * 1980-12-11 1982-05-25 International Business Machines Corp. Dual cavity drop generator
US4353078A (en) * 1979-09-24 1982-10-05 International Business Machines Corporation Ink jet print head having dynamic impedance adjustment
US4383264A (en) * 1980-06-18 1983-05-10 Exxon Research And Engineering Co. Demand drop forming device with interacting transducer and orifice combination
EP0078385A2 (en) * 1981-10-30 1983-05-11 International Business Machines Corporation Ink jet printers
US4395719A (en) * 1981-01-05 1983-07-26 Exxon Research And Engineering Co. Ink jet apparatus with a flexible piezoelectric member and method of operating same
US4465234A (en) * 1980-10-06 1984-08-14 Matsushita Electric Industrial Co., Ltd. Liquid atomizer including vibrator
US4466571A (en) * 1981-06-24 1984-08-21 Muehlbauer Reinhard High-pressure liquid injection system
US4514742A (en) * 1980-06-16 1985-04-30 Nippon Electric Co., Ltd. Printer head for an ink-on-demand type ink-jet printer
US4605167A (en) * 1982-01-18 1986-08-12 Matsushita Electric Industrial Company, Limited Ultrasonic liquid ejecting apparatus
US4629119A (en) * 1984-01-26 1986-12-16 Nordson Corporation Electrostatic isolation apparatus and method
US4646106A (en) * 1982-01-04 1987-02-24 Exxon Printing Systems, Inc. Method of operating an ink jet
US4879568A (en) * 1987-01-10 1989-11-07 Am International, Inc. Droplet deposition apparatus
US4897674A (en) * 1985-12-27 1990-01-30 Canon Kabushiki Kaisha Liquid jet recording head
US5423481A (en) * 1993-09-20 1995-06-13 The United States Of America As Represented By The Secretary Of The Navy Meniscus regulator system
US5877580A (en) * 1996-12-23 1999-03-02 Regents Of The University Of California Micromachined chemical jet dispenser
US5967045A (en) * 1998-10-20 1999-10-19 Imation Corp. Ink delivery pressure control
US6050679A (en) * 1992-08-27 2000-04-18 Hitachi Koki Imaging Solutions, Inc. Ink jet printer transducer array with stacked or single flat plate element
US6070973A (en) * 1997-05-15 2000-06-06 Massachusetts Institute Of Technology Non-resonant and decoupled droplet generator
US20040217186A1 (en) * 2003-04-10 2004-11-04 Sachs Emanuel M Positive pressure drop-on-demand printing
US20070262163A1 (en) * 2004-10-29 2007-11-15 Osmooze Nebulizer device and method with overpressurization of a liquid to be nebulized
US20140091155A1 (en) * 2012-09-28 2014-04-03 Amastan Llc High frequency uniform droplet maker and method
US20160228903A1 (en) * 2012-09-28 2016-08-11 Amastan Technologies Llc High frequency uniform droplet maker and method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57181875A (en) * 1981-05-06 1982-11-09 Nec Corp Ink jet head and ink jet recording device
GB2152877A (en) * 1984-01-16 1985-08-14 Howtek Inc Droplet ejector with control of fluid inlet to a reservoir

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3191623A (en) * 1963-02-21 1965-06-29 Romald E Bowles Passive pure fluid component
US3281860A (en) * 1964-11-09 1966-10-25 Dick Co Ab Ink jet nozzle
US3554209A (en) * 1969-05-19 1971-01-12 Bourns Inc Fluid diode
US3700169A (en) * 1970-10-20 1972-10-24 Environment One Corp Process and appratus for the production of hydroelectric pulsed liquids jets
US3747120A (en) * 1971-01-11 1973-07-17 N Stemme Arrangement of writing mechanisms for writing on paper with a coloredliquid

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3191623A (en) * 1963-02-21 1965-06-29 Romald E Bowles Passive pure fluid component
US3281860A (en) * 1964-11-09 1966-10-25 Dick Co Ab Ink jet nozzle
US3554209A (en) * 1969-05-19 1971-01-12 Bourns Inc Fluid diode
US3700169A (en) * 1970-10-20 1972-10-24 Environment One Corp Process and appratus for the production of hydroelectric pulsed liquids jets
US3747120A (en) * 1971-01-11 1973-07-17 N Stemme Arrangement of writing mechanisms for writing on paper with a coloredliquid

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3940773A (en) * 1973-08-16 1976-02-24 Matsushita Electric Industrial Co., Ltd. Liquid droplet writing mechanism
US3941312A (en) * 1973-11-23 1976-03-02 Research and Development Laboratories of Ohno Company Limited Ink jet nozzle for use in a recording unit
US4291316A (en) * 1975-06-03 1981-09-22 Ricoh Co., Ltd. System for driving ink drop generator of ink-jet printer
US4223998A (en) * 1975-08-25 1980-09-23 Siemens Aktiengesellschaft Piezo-electric actuating element for recording heads
US4104645A (en) * 1975-10-28 1978-08-01 Xerox Corporation Coincidence ink jet
US4112433A (en) * 1975-11-21 1978-09-05 Xerox Corporation Meniscus dampening drop generator
US4115789A (en) * 1976-01-15 1978-09-19 Xerox Corporation Separable liquid droplet instrument and piezoelectric drivers therefor
US4057807A (en) * 1976-01-15 1977-11-08 Xerox Corporation Separable liquid droplet instrument and magnetic drivers therefor
US4032928A (en) * 1976-08-12 1977-06-28 Recognition Equipment Incorporated Wideband ink jet modulator
US4326205A (en) * 1976-10-12 1982-04-20 Xerox Corporation Coincidence fluid displacement and velocity expression of droplet
US4216477A (en) * 1978-05-10 1980-08-05 Hitachi, Ltd. Nozzle head of an ink-jet printing apparatus with built-in fluid diodes
US4245225A (en) * 1978-11-08 1981-01-13 International Business Machines Corporation Ink jet head
US4245227A (en) * 1978-11-08 1981-01-13 International Business Machines Corporation Ink jet head having an outer wall of ink cavity of piezoelectric material
US4201995A (en) * 1978-12-04 1980-05-06 Xerox Corporation Coincidence gate ink jet with increased operating pressure window
US4199769A (en) * 1978-12-04 1980-04-22 Xerox Corporation Coincidence gate ink jet with increased operating pressure window
US4199770A (en) * 1978-12-04 1980-04-22 Xerox Corporation Coincidence gate ink jet with increased operating pressure window
US4278983A (en) * 1979-05-23 1981-07-14 Gould Inc. Ink jet writing device
US4353078A (en) * 1979-09-24 1982-10-05 International Business Machines Corporation Ink jet print head having dynamic impedance adjustment
US4514742A (en) * 1980-06-16 1985-04-30 Nippon Electric Co., Ltd. Printer head for an ink-on-demand type ink-jet printer
US4383264A (en) * 1980-06-18 1983-05-10 Exxon Research And Engineering Co. Demand drop forming device with interacting transducer and orifice combination
US4465234A (en) * 1980-10-06 1984-08-14 Matsushita Electric Industrial Co., Ltd. Liquid atomizer including vibrator
US4331964A (en) * 1980-12-11 1982-05-25 International Business Machines Corp. Dual cavity drop generator
US4395719A (en) * 1981-01-05 1983-07-26 Exxon Research And Engineering Co. Ink jet apparatus with a flexible piezoelectric member and method of operating same
US4466571A (en) * 1981-06-24 1984-08-21 Muehlbauer Reinhard High-pressure liquid injection system
EP0078385A2 (en) * 1981-10-30 1983-05-11 International Business Machines Corporation Ink jet printers
US4403229A (en) * 1981-10-30 1983-09-06 International Business Machines Corporation Maintenance system to prime and to exclude air from ink jet heads
EP0078385A3 (en) * 1981-10-30 1984-07-04 International Business Machines Corporation Ink jet printers
US4646106A (en) * 1982-01-04 1987-02-24 Exxon Printing Systems, Inc. Method of operating an ink jet
US4605167A (en) * 1982-01-18 1986-08-12 Matsushita Electric Industrial Company, Limited Ultrasonic liquid ejecting apparatus
US4629119A (en) * 1984-01-26 1986-12-16 Nordson Corporation Electrostatic isolation apparatus and method
US4897674A (en) * 1985-12-27 1990-01-30 Canon Kabushiki Kaisha Liquid jet recording head
US4879568A (en) * 1987-01-10 1989-11-07 Am International, Inc. Droplet deposition apparatus
US4887100A (en) * 1987-01-10 1989-12-12 Am International, Inc. Droplet deposition apparatus
US6050679A (en) * 1992-08-27 2000-04-18 Hitachi Koki Imaging Solutions, Inc. Ink jet printer transducer array with stacked or single flat plate element
US5423481A (en) * 1993-09-20 1995-06-13 The United States Of America As Represented By The Secretary Of The Navy Meniscus regulator system
US5877580A (en) * 1996-12-23 1999-03-02 Regents Of The University Of California Micromachined chemical jet dispenser
US6070973A (en) * 1997-05-15 2000-06-06 Massachusetts Institute Of Technology Non-resonant and decoupled droplet generator
US5967045A (en) * 1998-10-20 1999-10-19 Imation Corp. Ink delivery pressure control
US20040217186A1 (en) * 2003-04-10 2004-11-04 Sachs Emanuel M Positive pressure drop-on-demand printing
US7077334B2 (en) 2003-04-10 2006-07-18 Massachusetts Institute Of Technology Positive pressure drop-on-demand printing
US7766253B2 (en) * 2004-10-29 2010-08-03 Osmooze Nebulizer device and method with overpressurization of a liquid to be nebulized
US20070262163A1 (en) * 2004-10-29 2007-11-15 Osmooze Nebulizer device and method with overpressurization of a liquid to be nebulized
US9782791B2 (en) * 2012-09-28 2017-10-10 Amastan Technologies Llc High frequency uniform droplet maker and method
US20140091155A1 (en) * 2012-09-28 2014-04-03 Amastan Llc High frequency uniform droplet maker and method
US9321071B2 (en) * 2012-09-28 2016-04-26 Amastan Technologies Llc High frequency uniform droplet maker and method
US20160228903A1 (en) * 2012-09-28 2016-08-11 Amastan Technologies Llc High frequency uniform droplet maker and method

Also Published As

Publication number Publication date Type
GB1408676A (en) 1975-10-01 application

Similar Documents

Publication Publication Date Title
US3452360A (en) High-speed stylographic apparatus and system
US3708798A (en) Ink distribution for non-impact printing recorder
US3946398A (en) Method and apparatus for recording with writing fluids and drop projection means therefor
US4737802A (en) Fluid jet printing device
US4527175A (en) Ink supply system for nonimpact printers
US4506276A (en) Ink supply system
US2512743A (en) Jet sprayer actuated by supersonic waves
US4475113A (en) Drop-on-demand method and apparatus using converging nozzles and high viscosity fluids
US4530464A (en) Ultrasonic liquid ejecting unit and method for making same
US5510816A (en) Method and apparatus for driving ink jet recording head
US5988799A (en) Ink-jet head having ink chamber and non-ink chamber divided by structural element subjected to freckling deformation
US6188416B1 (en) Orifice array for high density ink jet printhead
US20040263567A1 (en) Low-cost liquid droplet spray device and nozzle body
US2855244A (en) Sonic liquid-spraying and atomizing apparatus
US4158847A (en) Piezoelectric operated printer head for ink-operated mosaic printer units
US3683212A (en) Pulsed droplet ejecting system
US6273553B1 (en) Apparatus for using bubbles as virtual valve in microinjector to eject fluid
US3281860A (en) Ink jet nozzle
US5157420A (en) Ink jet recording head having reduced manufacturing steps
US4418356A (en) Ink jet print head
US4364067A (en) Highly integrated ink jet head
US3902083A (en) Pulsed droplet ejecting system
US4683477A (en) Ink jet print head
US4727378A (en) Method and apparatus for purging an ink jet head
US3988745A (en) Printing ink supply device for ink jet printer

Legal Events

Date Code Title Description
AS Assignment

Owner name: OLYMPIA AKTIENGESELLSCHAFT

Free format text: CHANGE OF NAME;ASSIGNOR:OLYMPIA WERKE AKTIENGESELLSCHAFT;REEL/FRAME:004543/0156

Effective date: 19860220

AS Assignment

Owner name: A E G OLYMPIA AKTIENGESELLSCHAFT

Free format text: CHANGE OF NAME;ASSIGNOR:OLYMPIA AKTIENGESELLSCHAFT;REEL/FRAME:004882/0795

Effective date: 19880404