JPH1052917A - Electrostatic suction type recording device - Google Patents

Abstract

(57) Abstract: When a voltage is applied between a recording electrode and a counter electrode, electric charge is injected into conductive ink and the electric charge concentrates on the tip of the ink. In some cases, the electric charges were concentrated on the end of the nozzle and a plurality of strings were generated. SOLUTION: A head body 7 has an ink chamber 8 and an ink discharge port 2, and a head body 7 serving as a bottom of the ink chamber 8 is provided.
A buckling body 10 which is a thermally deformable body is integrated with the substrate 9 at both ends or the periphery thereof, and the other part is provided in a state of floating from the substrate 9, and this part is made movable, 10, a heater 11 is provided on the bottom surface, and a recording electrode 12 is provided inside the ink discharge port 2 (on the side of the ink chamber 8). A counter electrode 4 is provided to face the ink ejection port 2 of the head body 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a recording electrode provided in a slit-like space or nozzle filled with ink and applying a voltage between the recording electrode and a counter electrode facing the nozzle. The present invention relates to an electrostatic suction type recording apparatus which flies or protrudes / contacts to form an image.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 36-13768 discloses a method of injecting electric charge into a conductive ink to protrude the ink by electrostatic attraction to print on a print medium.
In this method, instead of discharging ink,
In this method, a voltage is applied between the recording electrode and the counter electrode, and the ink is suctioned onto a recording medium by electrostatic attraction acting on the ink to perform recording.

Further, as an improved version of this electrostatic suction type recording apparatus, Japanese Patent Application Laid-Open No. 62-225353 discloses an electrostatic suction type recording apparatus provided with ink heating means. In this method, a heating resistor is provided on a wall member of a recording head, the ink is heated by the heat generated by the heating resistor to reduce the viscosity of the ink, and then, a space between a counter electrode facing the recording head and an electric field forming electrode is formed. A predetermined voltage is applied to the ink to fly the ink, and recording is performed on a recording member.

[0004]

In an electrostatic suction type recording apparatus, electrification is injected into conductive ink and the ink is sucked toward the counter electrode by electrostatic attraction. Alternatively, the ink droplets reach the printing surface in the form of a thread, but the diameter of the droplets or the string can be formed as small as about 10 μm, and the printing quality is good. Since it is composed of electrodes for generating an electric field between the electrodes, the configuration is very simple. However, it is necessary to apply a high voltage in order to fly ink only by electrostatic attraction due to an electric field between the electrodes.

As a method of improving this point, a method of heating the ink and causing the ink to fly at a low voltage is described in JP-A-62-225353.

In this method, the ink held in the slit-shaped space is selectively heated to lower the viscosity, surface tension, and volume resistivity of the heated portion of the ink, and only the heated portion is not heated. It is designed to fly at a lower voltage than that of.

However, even with this method, the problem that the stringing of the ink is not stably generated only by applying a voltage between the electrodes remains unsolved. The reason is that when a voltage is applied between the electrodes, the electric charge is injected into the conductive ink and the electric charge concentrates on the tip of the ink.However, since the ink is usually concave at the slit or the ink ejection port of the nozzle due to surface tension, the slit or Electric charges are concentrated on the end of the nozzle, and it is not known from which point on the end the ink bulges, and in some cases, multiple stringing may occur, significantly deteriorating print quality. I was letting it.

To improve this point, a method of forming a convex meniscus has been proposed in order to stably generate a string. A method in which the ink tank is held at a position higher than the ink ejection port, or a method in which a static meniscus is constantly applied from behind the pressure chamber to form a convex meniscus, and a traveling wave is generated in the ink, or a piezoelectric element or the like is used. There is a method in which a convex meniscus is formed by applying periodic pressure to a pressure chamber by an actuator, and a voltage is applied in synchronization with the meniscus to generate a string.

The former disadvantage is that since the convex meniscus is constantly formed, if the balance between the static pressure and the ink surface tension is lost, the ink will flow out from the ink discharge port, and foreign matter such as paper dust will be generated. When the ink adheres to the vicinity of the ink ejection port, the ink may easily flow along the foreign matter. Also, it takes time for the ink consumed by the flight to be re-supplied by the hydrostatic pressure and return to the initial meniscus state, which limits printing at a high frequency. When trying to drive, there is a case where the injection of electric charge cannot be made in time.

In the latter method, the risk of ink leakage is reduced, but a new device for forming a convex meniscus other than the electrodes is separately required, and the device is separately manufactured and attached to the head base. However, the most common piezoelectric element as an actuator is difficult to perform fine machining.
There is a problem in that the nozzles cannot be arranged at a density higher than dpi, the degree of integration of the nozzles is reduced, the printing speed is reduced, and the size of the head is increased.

The electrostatic suction type recording apparatus of the present invention has been made in view of the above-mentioned problem, and is provided with a heat deformable body which is deformed by heat to form a convex meniscus at an ink discharge port of a nozzle. The purpose is to deform the heat deformable body by heat and raise the ink temperature to lower the viscosity of the ink, and to form a convex meniscus by the deformation of the heat deformable body so that the ink can always fly stably. is there.

[0012]

According to a first aspect of the present invention, there is provided an electrostatic suction type recording apparatus comprising: a recording electrode provided in a slit-like space or a nozzle filled with ink; In an electrostatic suction type recording apparatus which forms an image by flying or rising / contacting an ink by applying a voltage between a facing counter electrode and a recording electrode, a convex meniscus is formed at an ink discharge port of the nozzle. A heat deformable body that is deformed by heat is provided for forming. According to the above configuration, the heat deformable body is deformed by heat and the ink temperature is increased to lower the viscosity of the ink, and a convex meniscus is formed by the deformation of the heat deformable body so that the ink can always fly stably.

According to a second aspect of the present invention, during non-recording, the temperature of the heat deformable body is controlled to a constant temperature equal to or lower than the temperature at which the heat deformable body is deformed when the temperature of the ink is not higher than the boiling point. In addition, a temperature control means is provided for controlling the temperature at which the heat deformable body deforms at the time of recording. According to the above configuration, the temperature of the heat deformable body is constantly controlled at the time of non-recording, so that it is possible to deform the heat deformable body only by applying a small amount of thermal energy at the time of recording.

According to a third aspect of the present invention, there is provided an electrostatic suction type recording apparatus including a control means for applying a recording voltage to the two electrodes in synchronization with a periodic deformation cycle of the heat deformable body. According to the above configuration, by periodically applying heat to deform the heat deformable body, the ink is always kept in a heated state, the viscosity of the ink is reduced, and the ink can fly stably.

According to a fourth aspect of the present invention, in the electrostatic suction type recording apparatus, a needle-like member is provided near the ink discharge port of the nozzle.
According to the above configuration, the convex meniscus of the ink is formed in a stable state by the surface tension of the needle-shaped member.

According to a fifth aspect of the present invention, in the electrostatic suction type recording apparatus, the needle-like member is formed of a conductive member and also serves as the recording electrode. According to the above configuration, high-speed printing is enabled by directly injecting electric charges into the convex meniscus formed by the heat deformable body.

[0017]

FIG. 1 is a schematic perspective view of an electrostatic suction type recording apparatus according to the present invention. A print target medium 3 and a counter electrode 4 are provided for ink discharge ports 2 of a head unit 1 of four colors. In this configuration, the head unit 1 may be a single color only, for example, only black. The printing medium 3 may be a medium for final output such as paper or an intermediate transfer body.

When the printing medium 3 is an intermediate transfer member, transfer means such as a transfer roller, a cleaning mechanism for the intermediate transfer member, etc., not shown in FIG. 1, are required.
A bias voltage 5 is applied to all the channels, and a selection signal is further applied from a selection signal application unit 6 to the channels for sucking ink.

FIGS. 2 to 4 show the configuration of the recording head of the electrostatic suction type recording apparatus according to the first embodiment of the present invention. The head body 7 has an ink chamber 8 and an ink discharge port 2. A buckling body 10, which is a thermally deformable body, is provided on a substrate 9 constituting the head body 7, which is a bottom of the ink chamber 8, at both ends or around the substrate. 9, and the other parts are provided in a state of being floated from the substrate 9,
This portion is made movable, and a heater 11 is provided on the bottom surface of the buckling body 10.
And the recording electrode 12 is provided inside the ink discharge port 2 (on the ink chamber 8 side). A counter electrode 4 is provided to face the ink ejection port 2 of the head body 7.

The operation of the recording head of the electrostatic suction type recording apparatus of the present invention having the above configuration will be described. As shown in FIG. 3, when the heater 11 is energized, the heater 11 heats the buckling body 10 and At the same time, the temperature of the ink around the buckling body 10 in the ink chamber 8 is also increased. Then, since both ends of the buckling body 10 are integrated with the substrate 9, the buckling body 10 cannot expand in the direction of the arrow X in the drawing, and when the internal stress increases and reaches a specific buckling temperature, the buckling body 10 undergoes buckling deformation. In the drawing, the central portion swells and deforms toward the ink chamber 8 shown by the arrow Y, and the ink causes the ink ejection port 2 to form a convex meniscus.

Then, as shown in FIG. 4, when a recording voltage is applied between the recording electrode 12 and the counter electrode 4 in synchronization with the growth of the convex meniscus of the ink, the electrostatic attraction between the recording electrode 12 and the counter electrode 4 is increased. A string 13 of ink is generated by the force. At this time, since the viscosity and the surface tension of the ink are reduced because the ink is heated, the ink flies at a lower voltage. Further, since the volume resistivity is also reduced, charge injection into the ink is performed quickly, and high-speed response is possible.

As described above, by heating the buckling body 10 to raise the ink temperature and lower the viscosity of the ink,
The recording voltage for electrostatically sucking ink can be reduced.
In addition, a convex meniscus is formed at the ink discharge port 2 by the buckling deformation of the buckling body 10, and the thread of the ink can be stably grown, so that the ink always flies from the top of the meniscus and print quality is improved. I do.

Since the buckling body 10 having a single heater can perform two functions, that is, the function of raising the temperature of the ink and the function of forming a convex meniscus, the buckling body 10 having a built-in heater and the buckling body can be used. A single heater can be used as a heater for deforming the body 12, and the manufacturing process is simplified as compared with the case where the heater is manufactured separately.

The buckling member 7 can be manufactured by micromachining using photolithography. As shown in FIG. 5, first, SiO ₂ or SiN
A protective film 14 made of Si is formed on both surfaces of the substrate 9, Al is deposited thereon by about 5000 °, and unnecessary portions are etched with an etchant to form the first sacrificial layer 15.

Next, as shown in FIG. 6, a first insulating layer 16 such as SiO ₂ and SiN is sputtered thereon, and Ni17 as a heater material is sputtered thereon. Then, as shown in FIG. 7, a resist film is formed on the heater by photolithography, and ion milling is performed to remove the resist film. Thus, a heater 11 made of Ni having a desired shape is completed.

Next, as shown in FIG.
Is sputtered on the second insulating layer 18 such as SiO ₂ and SiN. Thereafter, Ni of the buckling body 10a is laminated by plating, and Al is deposited thereon as the second sacrificial layer 19.

Further, as shown in FIG. 9, a Ni diaphragm 20 is laminated, and finally one of the protective films 1 on the substrate 9 is formed.
4, a hole 21 is formed by dry etching.
1 to the first sacrificial layer 15 with a KOH aqueous solution,
When the second sacrificial layer 19 is removed, the buckled body 10 with the diaphragm including the heater 11 is completed.

Therefore, the buckling member 10 can be manufactured in a large amount with high precision and fine dimensions by the micromachining technique, and a highly integrated head can be provided at low cost.

FIGS. 10A to 10E relate to drive control 1 of the electrostatic suction type recording apparatus of the present invention. In the figure, H is the voltage applied to the heater 11 and E is the recording electrode 12.
And the voltage applied between the opposing electrodes 4.

The voltage H applied to the heater 11 is not always 0, and the heater 1 can be used in both the channels where ink dots need to be formed and those that do not.
A current is passed through the buckling member 1 to keep the buckling body 10 at a temperature lower than the buckling temperature. At the same time, the temperature of the ink is kept constant. And the channels where dots should be formed include:
By increasing the voltage applied to the heater 11 and flowing it, the buckling body 10 is heated to a temperature higher than the buckling temperature and buckled to make the ink meniscus convex. In synchronization with this, the recording electrode 12
When a recording voltage E is applied between the electrode and the counter electrode 4, the ink string grows from the top of the convex meniscus, and the ink flies.

FIGS. 10 (a) to 10 (e) show states in which the application timings of the voltage H and the recording voltage E are different, but in any case, the voltage H is not always zero.

FIGS. 11A to 11E relate to drive control 2 of the electrostatic suction type recording apparatus of the present invention. In the figure, H is the voltage applied to the heater 11 and E is the recording electrode 12.
And the voltage applied between the opposing electrodes 4.

The buckling body 10 is deformed by applying a voltage to the heater 11 at a constant frequency in all channels irrespective of whether it is an element to be printed or not. A recording voltage E is applied between the electrodes 4 to generate an ink string from the top of the convex meniscus. The pulse width and application timing of the recording voltage E with respect to the voltage H may be any of the cases shown in (a) to (e).

FIGS. 12 to 14 show the configuration of a recording head of an electrostatic suction type recording apparatus according to a second embodiment of the present invention. The head body 7 includes an ink chamber 8 and ink ejection ports 2 formed on the side surface.
A buckling body 10, which is a thermally deformable body, is integrated with the substrate 9 at both ends or around the substrate 9, and the other parts are separated from the substrate 9. The buckling member 1 is provided in a floating state, and this portion is made movable.
The heater 11 is provided on the bottom surface of the ink ejection port 2, the recording electrode 12 is provided inside the ink ejection port 2 (on the side of the ink chamber 8), and the needle-shaped member 22 is provided vertically to the ink ejection port 2.
A counter electrode 4 is provided to face the ink ejection port 2 of the head body 7.

The needle-like member 22 is located at the center of the ink discharge port 2, and is provided such that the tip thereof slightly protrudes from the ink surface.

The operation of the recording head of the electrostatic suction type recording apparatus of the present invention having the above configuration will be described. As shown in FIG.
When the heater 11 is energized, the heater 11 heats the buckling body 10 and simultaneously raises the temperature of the ink around the buckling body 10 in the ink chamber 8. Then, the buckling body 10
Since both ends are integrated with the substrate 9, when the internal stress increases and reaches a specific buckling temperature, buckling deformation occurs, and the central portion bulges toward the ink chamber 8 side. The ink pressurized by the bulging deformation travels on the surface of the needle-like member 22 due to the surface tension of the needle-like member 22 to form a convex meniscus in the ink ejection port 2.

Then, as shown in FIG. 14, when a recording voltage is applied between the recording electrode 12 and the counter electrode 4 in synchronization with the growth of the convex meniscus of the ink, the electrostatic attraction between the recording electrode 12 and the counter electrode 4 is increased. A string 13 of ink is generated by the force. At this time, a convex meniscus is formed along the surface of the needle-shaped member 22, so that the ink can reliably fly from the top of the convex meniscus.

In the recording head having the above structure, the buckling member 1
The needle-like member 22 provided for stabilizing the meniscus growth of the ink pressurized by 0 is formed of a conductive material, and also serves as the recording electrode 12.
May be provided so as to be omitted. Thus, the needle-shaped member 2
2, the buckling member 1
Since the charge can be directly injected into the ink of the convex meniscus portion formed by pressing by 0, it is possible to reliably cope with high-speed printing. Moreover, the recording electrode 1
2 can be omitted, and the number of parts can be reduced.

FIGS. 15 to 17 show a structure of a recording head of an electrostatic suction type recording apparatus according to a third embodiment of the present invention. The head body 7 includes an ink chamber 8 and ink ejection ports 2 formed on the side surface.
A buckling body 10, which is a thermally deformable body, is integrated with the substrate 9 at both ends or around the substrate 9, and the other parts are separated from the substrate 9. The buckling member 1 is provided in a floating state, and this portion is made movable.
The heater 11 is provided on the bottom surface of the ink ejection port 2, the recording electrode 12 is provided inside the ink ejection port 2 (on the side of the ink chamber 8), and the needle-shaped member 22 is provided vertically to the ink ejection port 2.
A counter electrode 4 is provided to face the ink ejection port 2 of the head body 7.

The needle member 22 is provided integrally on the buckling member 10 so as to be located at the center of the ink discharge port 2.

The operation of the recording head of the electrostatic suction type recording apparatus of the present invention having the above configuration will be described. As shown in FIG.
When the heater 11 is energized, the heater 11 heats the buckling body 10 and simultaneously raises the temperature of the ink around the buckling body 10 in the ink chamber 8. Then, the buckling body 10
Since both ends are integrated with the substrate 9, when the internal stress increases and reaches a specific buckling temperature, buckling deformation occurs, and the central portion bulges toward the ink chamber 8 side. The ink pressurized by the bulging deformation travels on the surface of the needle-like member 22 due to the surface tension of the needle-like member 22 to form a convex meniscus in the ink ejection port 2.

As shown in FIG. 17, when a recording voltage is applied between the recording electrode 12 and the counter electrode 4 in synchronization with the growth of the convex meniscus of the ink, the electrostatic attraction between the recording electrode 12 and the counter electrode 4 is increased. A string 13 of ink is generated by the force. At this time, a convex meniscus is formed along the surface of the needle-shaped member 22, so that the ink can reliably fly from the top of the convex meniscus.

Since the buckling member 10 and the needle-shaped member 22 are integrated, the buckling member 10 is
Even if it is provided at a position (bottom of the ink chamber 8) opposite to the ink, the ink near the ink discharge port 2 is heated more quickly and effectively by conducting heat through the needle-like member 22 having good thermal conductivity. can do. Further, since the presence of the needle-shaped member 22 and the buckling member 10 are provided at a position facing the ink ejection port 2, the ink meniscus can be grown in the center of the ink ejection port 2 in an extremely stable state, In addition, capping during non-operation is easier, and damage to the needle-like member 22 can be reduced, as compared with a structure in which the needle-like member 22 constantly protrudes from the ink ejection port 2.

In the recording head having the above structure, the buckling member 1
The needle-like member 22 provided for stabilizing the meniscus growth of the ink pressurized by 0 is formed of a conductive material, and also serves as the recording electrode 12.
May be provided so as to be omitted. Since the recording electrode 12 is also used by the needle-like member 22, electric charges can be directly injected into the ink of the convex meniscus portion formed by pressurization by the buckling member 10, so that high-speed printing can be reliably performed. Can respond. In addition, the recording electrode 12 can be omitted, and the number of components can be reduced.

[0045]

According to the first aspect of the present invention, since the electrostatic suction type recording apparatus is configured as described above, the ink temperature is increased by heating from the heat deformable body to lower the viscosity of the ink, and the ink is electrostatically charged. It is possible to reduce the recording voltage to be sucked.
In addition, a convex meniscus is formed at the ink discharge port of the nozzle by the thermal deformation of the thermal deformable body, and the thread of the ink can be stably grown. it can.

Since the function of raising the temperature of the ink and the function of forming the convex meniscus can be performed simultaneously, the heat generating element for deforming the heat deformable element and the heat generating element for heating the ink are also used. It can simplify the manufacturing process compared to separately manufacturing, can be driven at a lower voltage than conventional electrostatic suction type recording devices, has good print quality, and has low cost of integration. It is possible to provide a small and high electrostatic suction type recording apparatus.

Since the electrostatic suction type recording apparatus according to the second aspect has the above-described configuration, the heat deformable body is always controlled to a constant temperature during non-recording, so that only a small amount of thermal energy is applied during recording. Can deform the heat-deformable body, and can perform heat-deformation faster than applying heat from a state in which no heat is applied to the heat-deformed body. Furthermore, by raising the temperature of the entire ink, there is no difference between the ink temperature of the continuously recording channel and the ink temperature of the non-recording channel. This eliminates the need to adjust and control the recording voltage based on the driving history of each channel as in the conventional case, enabling high-speed printing and reducing the influence of the driving history of the channel. No high quality recording can be done.

Since the electrostatic suction type recording apparatus according to the third aspect is configured as described above, the ink is constantly heated by deforming the thermally deformable body by periodically applying heat to reduce the viscosity of the ink. It is possible to lower the pressure and form a stable convex meniscus, and because the convex meniscus of any channel is formed equally and periodically, the pressure change in the nozzle depending on whether the adjacent channel is driven or not The formation of a stable convex meniscus can be performed without being affected by the above.

Therefore, a constant voltage can be applied irrespective of the driving state of the adjacent channel, the printing quality can be improved by a stable convex meniscus, and the control can be performed with a simple structure.

According to the fourth aspect of the present invention, since the electrostatic suction type recording apparatus is configured as described above, the convex meniscus of the ink can be formed in a stable state by the surface tension of the needle-like member, and the heat deformable body can be formed. It is possible to provide the ink on the side of the nozzle near the ink discharge port without any limitation on the installation position of the ink, and it is possible to efficiently heat the ink near the ink discharge port, and to lower the surface tension and viscosity of the ink with lower energy. In addition, the volume resistivity can be reduced. Further, the rise time of the electrostatic suction type recording apparatus can be shortened.

Since the electrostatic suction type recording apparatus according to the fifth aspect has the above configuration, high-speed printing can be performed by directly injecting electric charges into the convex meniscus formed by the heat deformable body. In addition, the number of parts can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an electrostatic suction type recording apparatus of the present invention.

FIG. 2 is a cross-sectional view of the recording head of the electrostatic suction type recording apparatus according to the first embodiment of the present invention in a standby state.

FIG. 3 is a cross-sectional view illustrating the recording head of the electrostatic suction type recording apparatus according to the present invention during driving of the first embodiment.

FIG. 4 is a cross-sectional view illustrating the recording head of the electrostatic suction recording apparatus according to the first embodiment of the present invention when ink is ejected.

FIG. 5 is a cross-sectional view illustrating a first manufacturing process of the recording head of the electrostatic suction recording apparatus according to the first embodiment of the invention.

FIG. 6 is a sectional view illustrating a second manufacturing process of the recording head of the electrostatic suction recording apparatus according to the first embodiment of the invention.

FIG. 7 is a sectional view illustrating a third manufacturing process of the recording head of the electrostatic suction recording apparatus according to the first embodiment of the present invention.

FIG. 8 is a cross-sectional view illustrating a fourth manufacturing process of the recording head of the electrostatic suction recording apparatus according to the first embodiment of the invention.

FIG. 9 is a cross-sectional view illustrating a fifth manufacturing process of the recording head of the electrostatic suction recording apparatus according to the first embodiment of the invention.

FIGS. 10A to 10E are explanatory diagrams showing various application timings of a heater voltage H and a voltage E between a recording electrode and a counter electrode regarding drive control 1 of the electrostatic suction type recording apparatus of the present invention. is there.

11A to 11E are explanatory diagrams showing various application timings of a heater voltage H and a voltage E between a recording electrode and a counter electrode with respect to drive control 2 of the electrostatic suction type recording apparatus of the present invention. is there.

FIG. 12 is a cross-sectional view of a recording head of an electrostatic suction recording apparatus according to a second embodiment of the present invention during a standby state.

FIG. 13 is a cross-sectional view of the recording head of the electrostatic suction type recording apparatus according to the present invention during driving of the second embodiment.

FIG. 14 is a cross-sectional view illustrating a recording head of an electrostatic suction recording apparatus according to a second embodiment of the present invention when ink is ejected.

FIG. 15 is a cross-sectional view of the recording head of the electrostatic suction type recording apparatus according to the present invention in a standby state of Embodiment 3;

FIG. 16 is a cross-sectional view of the recording head of the electrostatic suction type recording apparatus according to the present invention during driving of the third embodiment.

FIG. 17 is a cross-sectional view illustrating a recording head of an electrostatic suction recording apparatus according to a fourth embodiment of the present invention when ink is ejected.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head unit 2 Ink discharge port 3 Print medium 4 Counter electrode 7 Head main body 8 Ink chamber 9 Substrate 10 Buckling body 11 Heater 12 Recording electrode 13 Ink thread 22 Needle member

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor ▼ Yoshi ▲ Murahisa 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka Sharp Corporation

Claims (5)

[Claims] A recording electrode is provided in a slit-like space or a nozzle filled with ink, and a voltage is applied between a recording electrode and a counter electrode facing the nozzle to cause the ink to fly or bulge. An electrostatic suction type recording apparatus for forming an image by contacting, wherein a thermally deformable body deformed by heat is provided at an ink discharge port of the nozzle to form a convex meniscus. . 2. A non-recording state in which the temperature of the ink is equal to or lower than the boiling point and the temperature of the heat deformable body is controlled to a constant temperature equal to or lower than a temperature at which the heat deformable body deforms. 2. An electrostatic suction type recording apparatus according to claim 1, further comprising a temperature control means for controlling the temperature to be higher than a predetermined temperature. 3. The electrostatic suction type recording apparatus according to claim 1, further comprising control means for applying a recording voltage to said two electrodes in synchronization with a periodic deformation cycle of said thermal deformation body. 4. The electrostatic suction type recording apparatus according to claim 1, wherein a needle-shaped member is provided near an ink discharge port of the nozzle. 5. The electrostatic suction type recording apparatus according to claim 4, wherein said needle-like member is formed of a conductive member and also serves as said recording electrode.