• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    PURPOSE:To prevent loading of a nozzle and enable high speed recording by oppositely disposing an ink discharge nozzle and an air discharge nozzle and supplying moist air to space between the two nozzles.
    公开号:SU849985A3
    申请号:SU762378055
    申请日:1976-06-24
    公开日:1981-07-23
    发明作者:Миура Масаеси；Ямамори Киеси；Мизогучи Акира
    申请人:Мацусита Электрик Индастриал Компанилимитед (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to devices for applying liquid droplets to a surface, such as paper, for recording on it with ink. $
    A device is known for applying liquid droplets to a surface containing a liquid chamber with an outlet and a channel for supplying liquid, and a means for generating 10 periodically increasing the pressure of the liquid in the chamber, in which the liquid is ejected onto the paper in a series of droplets by applying electrical impulses to the means for periodically <5 to a dynamic increase in fluid pressure in the chamber [1].
    However, as a result of the formation of liquid droplets of a relatively large size, and also due to the * high 20 operating speed of the recording mechanism and the inevitable swirl of the air flow at the recording surface, good recording quality is not ensured and gradation of the 25 resulting image is difficult.
    The purpose of the invention is to reduce the spread of the torch and the size of the drops.
    The specified goal is achieved by. that the device is equipped with a baffle installed in the liquid chamber 31) with a hole coaxial with its outlet, fixed to the liquid chamber with a pneumatic chamber and air supply means connected to the latter via the line, and an air humidifier is installed on said line.
    The air humidifier is made in the form of a container divided by a porous partition into chambers, one of which is connected to the air supply means, and the other to the pneumatic chamber.
    In one embodiment of the device, the air humidifier is provided with an additional porous partition installed inside the container with a gap relative to the previously mentioned partition.
    In FIG. 1 shows a device, section; in FIG. 2, - another embodiment of the device, section, 'on. FIG. 3 - section aa in figure 2; in FIG. 4 is a diagram of an air supply means; in FIG. 5 - humidifier, section, * in FIG. 6 is another embodiment of a humidifier, cut.
    A device for applying liquid droplets to a surface comprises a liquid chamber 1 connected by a channel 2 for supplying liquid to a supply tank 3 and provided with an outlet 4 and means for creating a periodic increase in the pressure of the liquid in the chamber 1, mounted on the liquid chamber 1, a pneumatic chamber 5, connected by highway 6 through an air humidifier 7 with air supply means 8 and provided with an outlet 9 located coaxially with the outlet 4 of the liquid chamber 1.
    The liquid chamber 1 by means of the partition 10 is divided into outer 11 and inner 12 parts communicating with each other through an opening 13 in the partition 10, which is made coaxially with the outlet holes 4 and 9 of the liquid 1 and pneumatic 3 chambers, respectively. In addition, a hole 14 is made in the partition 10 connecting the outer part 11 of the liquid chamber 1 with the channel 2 for supplying liquid from the supply tank 3.
    The means for creating a periodic increase in the pressure of the liquid in the chamber 1 is made in the form of membranes 15 and a piezoelectric crystal 16 fixed on its body, the membrane 15 adjoining the inner part 12 of the liquid chamber 1 in the enlarged part 17. In this case, the cross-sectional area of the outlet opening 4 of the liquid chamber 1 should be significantly less than the cross-sectional area of the enlarged part 17, its inner part 12, and slightly smaller than the cross-sectional area of the outlet 9 of the pneumatic chamber 5. For supplying control pulses to the crystal 16 and wires 18 are connected to the membrane 15.
    The pneumatic chamber 5 includes an inlet channel 19 connecting it through the line 6 and an air humidifier 7 to the air supply means 8, an annular part 20 and a disk-shaped part 21, communicating with the atmosphere through the outlet 9. The height of the disk-shaped part 21 of the pneumatic chamber 5 must be significantly less than the height (size ^ dimension along the axis) of its annular part 20.
    Instead of the axial direction (Fig. 1), the inlet channel 19 can be directed tangentially to the circumference of the annular part 20 of the pneumatic chamber 5 (Figs. 2 and 3).
    The means 8 for supplying air to the pneumatic chamber 5 includes a pump • 22, to the outlet 23 of which an air filter is sequentially connected to filter out foreign particles and damp the pulsations of the air flow created by the pump 22, an air humidifier 7 to prevent drying of the liquid in the outlet 4 of the liquid chamber 1 and air pressure regulator 25, the latter being connected via line 26 to a supply tank 3. ·
    The air humidifier 7 (Fig. 5) is made in the form of a container 27 partially filled with water and divided by a porous partition 28 into the inlet 29 and the outlet 30 of the chamber, the first of which is connected via line 31 to the air filter 24, and the second through line 32 to the inlet a channel 19 of the pneumatic chamber 5. To partially fill the tank 27 with water, a pipe 33 is connected to its side wall. '
    Another embodiment of the humidifier 7 (Fig. 6) is also a container 27 partially filled with water and containing a porous partition 28, and, in addition, an additional porous partition 34. The partition 28 and 34 divide the container 27 of the humidifier 7 into, similarly, the inlet 29 and the outlet 30, as well as the intermediate chamber 33, the inlet chamber 29 through the line 31 connected to the air filter 24, and the outlet 30 through the line 32 with the inlet channel 19 of the pneumatic chamber 5 and through the line 35 with adjust rum 25 air pressure. To partially fill the tank 27 with water, a pipe 33 is also attached to its side wall.
    A device for applying liquid droplets to a surface works as follows.
    When a piezoelectric crystal 16 is excited by an electric pulse, the liquid from the inner part 12 of the liquid chamber 1 under the pressure of the membrane 15 is ejected through the hole 13 in the partition 10 into the outer part 11 of the chamber 1 and then through the outlet openings 4 and 9 to the recording surface. When the pulse supply is stopped, the direction of fluid flow in the hole 13 in the baffle 10 is reversed, and the liquid is sucked from the supply tank 3 through the channel 2 through the hole 14 in the baffle 10 and the outer part 11 into the inner part 12 of the liquid chamber {1].
    At the same time, to the annular part 20 of the pneumatic chamber 5 from the air supply means 8 through the inlet channel 19, a constant air pressure flows, which diverges when passing through the annular part 20 of the pneumatic chamber 6 and converges when it enters the disk-shaped part 21 of the chamber 5, after which it exits through the outlet 8 at high speed.
    The pressure of the supplied air is set so that the pressure in the annular part 20 of the pneumatic chamber 5 is equal to the pressure in the outlet 4 of the liquid chamber 1 • to ensure the suction of the liquid from the hole 4 with overcoming the surface tension and viscosity of the liquid, and so that the air velocity at the outlet of the outlet 9 was greater than the rate at which liquid is ejected from the outlet 4, which allows acceleration of the ejected liquid by air flow.
    Since the liquid breaks up into a series of droplets of decreasing size during ejection, smaller droplets accelerate faster than larger droplets, as a result of which they reach the recording surface at essentially the same time.
    When the inlet channel is tangent to the circumference of the annular part 20 of the pneumatic chamber 5 (FIGS. 2 and 3), a circular air flow is formed in the annular part of the chamber 5, shown by the arrow in FIG. 3. In the disk-shaped part 21 of the chamber 5, the air spirals radially inward to the outlet.
    Due to the absence of an axial component in the spiral air flow in the disk-shaped part 21 of the pneumatic chamber 5, air from this part of the chamber 5 can be sucked through the outlet 4 into the outer part 11 and further into the inner part 12 of the liquid chamber 1, preventing receipt. satisfactory ejection of liquid.
    To prevent such an introduction of air, the supply tank 3 for the liquid is connected via a line 26 to the air supply means, as a result of which excess pressure of air and, therefore, liquid is created in the supply tank 3. Due to this, the pressure of the liquid in the outlet 4 of the liquid chamber 1 increases, it is set manually by the regulator 25 so that it is equal to the air pressure in the disk-shaped part 21 of the pneumatic chamber 5.
    The approximate sizes of the liquid 1 and pneumatic 5 chambers of the device, providing a high-speed laminar air flow at the outlet of the outlet 9 of the pneumatic chamber 5 at a supply pressure of 1001,000 mm of water column, may be the following: the outer diameter of the annular part 45 of the pneumatic chamber 5 - 20 mm; the width of the annular part 20 of the pneumatic chamber 5 (W) 1-4 mm, 1 the height of the annular part 20 of the pneumatic chamber 5 (D) 0.5-2 mm, * the height of the disk-shaped part 21 of the pneumatic : chamber 5 (t) 10-100 microns; the diameter of the outlet 4 of the liquid chamber 1-40 microns; the diameter of the outlet 9 of the pneumatic chamber 5 is 100-150 microns.
    During pauses, when control pulses to the piezoelectric crystal 16 are not supplied, the surface of the liquid in the outlet 4 of the liquid chamber 1 may dry out, thereby increasing its viscosity. The humidifier 7 maintains its fluidity by moisturizing the air flow entering the pneumatic chamber 5.
    Compressed air coming from the filter 24 into the inlet chamber 29 of the humidifier 7 (Fig. 5), is moistened when passing through a water-saturated porous partition 28 and leaves the outlet chamber 30.
    In another structural embodiment of the humidifier 7 (Fig. 6), air enters from the filter 24 into the inlet (lower) chamber 29, passes through a porous septum 28 completely immersed in water, for example from glass or porcelain, and enters the water in the form of air bubbles, which float to the surface of the water. The next porous septum 34, mainly of fibrous material, absorbs spatter formed when air bubbles exit upward, but pass moistened air into the outlet (upper) chamber 30, from where it enters the pneumatic chamber 5 via line 32.
    As a result of using the present invention, the capabilities of mechanisms for writing data to a surface, such as paper, in a dynamic mode are greatly expanded. This ensures good recording quality due to the receipt in the device of droplets of liquid of a reduced size.
    权利要求:
    Claims (3)
    [1]
    A device for applying liquid droplets to the surface contains a liquid chamber 1 connected by a channel 2 for supplying a liquid to a supply tank 3 and provided with an outlet 4 and means for creating a periodic increase in the pressure of the liquid in chamber 1 attached to the liquid chamber 1 Pneumatic chamber 5 connected by line 6 through the air humidifier 7 with the air supply means 8 and provided with an outlet 9 located coaxially with the outlet 4 of the liquid chamber 1. Liquid chambers The sera 1 is divided by means of a partition 10 into an outer 11 and an inner 12 part communicating with each other through an opening 13 in the partition 10, which is made coaxially with outlet screw drivers 4 and 9 of fluid 1 and pneumatic 3 chambers, respectively. In addition, in the partition 10, an opening 14 is made connecting the outer part 11 of the liquid chamber 1 to the channel 2 for supplying liquid from the supply tank 3, the means for creating a periodic increase in the pressure of the liquid in chamber 1 is made in the form of a membrane 15 fixed on its body the piezoelectric crystal 16, and the membrane 15 is adjacent to the inner part 12 of the liquid chamber 1 in part 1 of an enlarged size. The cross-sectional area of the exhaust. The first opening 4 of the liquid chamber 1 should be significantly smaller than the cross-sectional area of part 17 of an enlarged size, its inner part 12 and slightly smaller than the cross-sectional area of the cross-section of the outlet 9 of the air bladder 5. For supplying control pulses to the crystal 16 wires 18. The pneumatic chamber 5 includes an inlet duct 19 connecting it via line 6 and a humidifier 7 air with air supply means 8, an annular part 20 and a disk-shaped part 21 communicating with the atmosphere There is an aperture 9. At the same time, the height of the disc-shaped part 21 of the pneumatic chamber 5 should be significantly less than the height (dimension along the axis) of its annular part 20. Instead of the axial direction (figure 1, inlet 19 can be directed tangentially to the circumference of the ring part 20 of the pneumatic chamber 5 (FIGS. 2 and 3), Wed., the air supply unit 8 to the pneumatic chamber 5 contains a pump 22, to the outlet 23 of which an air filter 24 is sequentially connected to filter out foreign particles and dampen the pulsations of the air flow, creating By the pump 22, an air humidifier 7 to prevent the liquid from drying out in the outlet 4 of the liquid chamber 1 and the air pressure regulator 25, the latter’s output being connected via line 26 to the supply tank 3, Air humidifier 7 (FIG. 5) is made in the form of a tank 27, partially filled with water and divided by a porous partition 28 to the inlet 29 and outlet 30 of the chamber, the first of which is connected via line 31 to the air filter 24, and the second through line 32 to the inlet channel 19 of the pneumatic chamber 5. To partially fill the tank 27 with water, a pipe 33 is attached to its side wall. Another design of the air humidifier 7 (Fig. 6) is also a tank 27 partially filled with water and containing a porous partition 28, and in addition An additional porous partition 34. The partition 28 and 34 divide the capacity 27 of the air humidifier 7 into, similarly, the inlet 29 and outlet 30, as well as the intermediate chamber 33, whereby the inlet chamber 29 is connected to the air filter 24 through outlet 31 by line 32 with an inlet channel 19 of the pneumatic chamber 5 and through line 35 with an air pressure regulator 25. To partially fill the container 27 with water, a pipe 33 is also attached to its side wall. A device for applying liquid droplets to the surfaces works as follows. When excited by an electric pulse of a piezoelectric crystal 16, the liquid from the inner part 12 of the liquid chamber 1 is ejected through the pressure of the membrane 15 through the opening 13 in the partition 10 into the outer part 11 of the chamber 1 and then through the discharge holes 4 and 9 onto the recording surface. When the pulse is stopped, the direction of the fluid flow in the opening 13 in the partition 10 is reversed, and the liquid is sucked from the supply tank 3 through channel 2 through the opening 14 in the partition 10 and the outer part 11 into the inner part 12 of the liquid chamber 13. At the same time, the annular part 20 of the pneumatic chamber 5 from the air supply means 8 through the inlet channel 19 receives a stream of air under constant pressure, which diverges as it passes through the annular part 20 of the pneumatic chamber 6 and converges when it enters iskoobraznuyu portion 21 of chamber 5, at le which exits through the outlet 8 at a high speed. The inlet air pressure is set such that the pressure in the annular portion 20 of the pneumatic to measure 5 is equal to the pressure in the outlet 4 of the liquid chamber to allow the liquid to be sucked out of the opening 4 to overcome the surface tension and viscosity of the liquid, and that the air velocity upon exiting the outlet 9 was greater than the speed at which the liquid was discharged from the outlet 4, which ensured that the ejected liquid was ejected by air flow. Because the ejection disperses the liquid into a series of droplets of a decreasing size, smaller droplets accelerate faster than larger droplets, as a result of which they reach the recording surface at essentially the same time. When the inlet passage 19 is formed tangentially to the circumference of the annular portion 20 of the pneumatic chamber 5 (FIGS. 2 and 3), an annular air flow is formed in the annular portion 20 of the chamber 5, shown by the arrow in FIG. 3. In the disk-shaped part 21 of the chamber 5, air spirals radially inward towards the outlet. Due to the absence of an axial component in the Spiral air flow in the disk-shaped part 21, the pneumatic chamber 5 from this part of the chamber 5 can be sucked through the outlet 4. part 11 and further into the internal part 12 of the liquid chamber 1, preventing the satisfactory release of liquid, to prevent such an intrusion of air, the supply reservoir 3 for the liquid is connected via line 26 with media Twomey air supply resulting in a feed reserve ape 3 is generated excess air pressure and hence the liquid. Due to this, the fluid pressure in the outlet 4 of the fluid chamber 1 is increased, it is manually set by the regulator 25 so that it is equal to the air pressure in the orifice portion 21 of the pneumatic chamber 5. The approximate dimensions of the fluid 1 and pneumatic 5 chambers of the device provide high-speed laminar air flow at the outlet of the outlet 9 of the pneumatic chamber 5 at a pressure of supplied air 100 1000 mm water column, can be the following: the outer diameter of the annular part 20 pneumatic chambers 5 - 20 mm; the width of the annular part 20 of the pneumatic chamber 5 (W) 1-4 mm, the height of the annular part 20 of the pneumatic chamber 5 (D) 0.5-2 mm / height of the disc-shaped part 21 of the pneumatic chamber 5 (t) 10-100 microns; the diameter of the outlet 4 of the liquid chamber 1 - 40 microns; the diameter of the outlet 9 of the pneumatic chamber 5 - 100-150 microns. During pauses, when the control pulses are not supplied to the piezoelectric crystal 16, the surface of the liquid in the outlet 4 of the liquid chamber 1 may dry out, resulting in an increase in its viscosity. The humidifier 7 maintains its fluidity by humidifying the air flow entering the pneumatic chamber 5. Compressed air coming from the filter 24 into the inlet chamber 29 of the humidifier 7 (Fig. 5) is humidified as it passes through the porous wall 28 saturated with water and exits the outlet chambers 30. With another design of the humidifier 7 (Fig. 6), the air enters from the filter 24 into the inlet (lower) chamber 29, passes through the porous partition 28 completely submerged in water, for example from glass or porcelain, and goes out into the water in the form of air bubbles that float to the surface of the water. The next porous partition 34, predominantly of fibrous material, absorbs splashes formed when air bubbles exit to the top, but pass humidified air into the output (upper) chamber 30, from where it enters the pneumatic chamber 5 through line 32. The capabilities of mechanisms for writing data to a surface, such as paper, are dynamic. At the same time, good recording quality is ensured due to the production of reduced size droplets in the device. Claim 1. A device for applying liquid droplets to a surface containing a liquid chamber with an outlet and a channel for supplying liquid, means for creating a periodic increase in the pressure of the liquid in the chamber, characterized in order to reduce torch spread and droplet sizes, it is provided a partition installed in the liquid chamber with a hole coaxial with its outlet opening, mounted on: the liquid chamber by a pneumatic chamber and connected to the latter by means of a line ohm air supply, and on the above-mentioned mastergrassa installed humidifier
    [2]
    2. A device according to Claim 1, characterized in that the humidifier is realized in the form of a container divided by a porous partition into ka: measures, one of which is connected with air supply means, and the other with an air chamber.
    [3]
    3. The device according to claim 2, wherein the humidifier is provided with an additional porous partition installed inside the tank 6 with a gap relative to the aforementioned partition. Sources of information taken into account in the examination 1. USSR author's certificate 523718, cl. B 05 B 1/02, 1974 (prototype).
    HELL
    . Voz & ul
    Water
    FIG.
    52
    类似技术:
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    同族专利:
    公开号 | 公开日
    DE2559996B1|1980-07-03|
    JPS5425416B2|1979-08-28|
    JPS51149029A|1976-12-21|
    DE2559996C3|1981-06-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3839721A|1973-06-27|1974-10-01|Ibm|Device for retention of ink jet nozzle clogging and ink spraying|JPS5492732A|1977-12-30|1979-07-23|Toray Industries|Drying preventing apparatus of ink jetting head|
    JPS54161336A|1978-06-10|1979-12-20|Tokushu Toryo Kk|Marking method|
    US4380018A|1980-06-20|1983-04-12|Sanyo Denki Kabushiki Kaisha|Ink droplet projecting device and an ink jet printer|
    JPS57142369A|1981-02-28|1982-09-03|Kyocera Corp|Ink jet head|
    JPS6330863B2|1981-02-28|1988-06-21|Kyosera Kk|
    JPS6330864B2|1981-03-28|1988-06-21|Kyosera Kk|
    JP2005059310A|2003-08-08|2005-03-10|Konica Minolta Medical & Graphic Inc|Inkjet printer|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP7346975A|JPS5425416B2|1975-06-16|1975-06-16|
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