JPH02231147A - Liquid jet recorder - Google Patents

Abstract

PURPOSE:To efficiently remove idle ink discharge, ink mist and to reduce in size a liquid jet recorder by providing rotary conveying means for conveying a recording medium to be given by liquid by recording means and recovery means for discharging medium from the recording means to the surface of the conveying means. CONSTITUTION:An orifice face is covered with a cap 3 in a state that a power source is OFF to prevent ink from evaporating from the end of a nozzle. When the power source is turned ON, a head unit is raised. If there is a circulation signal, a cap unit is moved by cap moving means 25, a recording head 1 is lowered to operate an ink circulation pump 38 to circulate ink, and the head unit is raised to return the cap unit to the original position. Air bubbles in an ink supply tube 5 and the head 1 are removed by circulating the ink. If there is an idle discharge signal, all the nozzles are idly actuated predetermined times. A sheet supply motor is turned ON, one recording sheet is picked from a cassette 26 by a sheet supply roller 16, guided by a guide 13, held between conveying pinch rollers 14 and 15, fed to the head 1, and recorded with colors. The sheet completely recorded is discharged to a sheet discharge tray 18.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a liquid jet recording device that achieves miniaturization by using a rotary (rotating) type conveyor belt or roller as a recording medium conveyance member. This paper relates to a liquid jet recording device that is particularly effective for full-line devices with enlarged print heads and full-color printing devices with increased print areas. (Prior Art) Liquid jet recording devices (inkjet recording devices) that record information such as characters and images by ejecting recording liquid from a recording head are widely known. The recording medium used for recording in this type of device is mainly paper or plastic sheets, and the operating noise is particularly low compared to other recording methods.
The basic mechanical structure has the advantage of being simple and inexpensive.
It has been used in various fields as a recording/output device for computers, word processors, etc. However, since this type of device performs printing by ejecting recording liquid (hereinafter referred to as ink) directly from the nozzles of the print head, it is necessary to keep the ink in a state where it can be ejected at all times, which is not the case with other types of devices. No special housing is required. In other words, since ink remains in the nozzles of the recording head even when not recording, it is necessary to take measures to prevent the ink in these nozzles from drying out or deteriorating in quality, such as increasing viscosity due to evaporation. Sometimes, devices are known that have a so-called capping means that covers the orifice of the recording head with a lid to prevent ink from drying or evaporating. (Problem to be Solved by the Invention) However, in a low humidity environment or during long-term suspension, an increase in the viscosity of the ink cannot be avoided by using only the above-mentioned drying prevention means, so in addition to the above-mentioned capping means, The air inside the cap that covers the recording head is sucked and negative pressure is applied from the orifice to suck out the ink stagnant inside the nozzle of the head, or the deteriorated ink can be removed from the orifice by applying pressure inside the nozzle using a bomb or the like. A recovery mechanism has been used to discharge the Furthermore, quality of ink may deteriorate due to non-use of nozzles during printing operations. In other words, in a device equipped with multiple print heads, depending on the statistical properties of the print data, there may be some rifts that are hardly used for printing, and therefore the ejection interval may become very long. There are variations. Therefore, when the number of times the ink is ejected is small or the ejection interval is long, the viscosity of the ink inside the nozzle increases due to drying depending on the atmospheric conditions such as humidity and temperature. This causes the nozzle to eject ink unstablely, or even become unable to eject ink. Therefore, ink is jetted toward the ink absorbing member in the capping means at certain intervals. Furthermore, in a recording device that employs at least one of full-line and full-color recording, or in a full-color scan type that requires high-speed recording, a large amount of Although the cause is not clear, because the ink is directed toward the recording medium, a ``kire''-shaped mist is likely to be generated, and there are also known inventions that employ suction means to solve this problem. (Object of the Invention) The present invention provides a liquid ejection method that can efficiently remove ink that is not involved in the formation of recorded images but is generated for image formation, that is, empty ejection ink and ink mist, and that can also achieve miniaturization of the device. The main purpose is to provide a recording device. Another object of the present invention is that in order to eject ink toward the ink absorbing member in the capping means, it is necessary to evacuate the recording head from the recording position, which significantly reduces the throughput in continuous paper feeding, that is, the recording speed. In view of the problem of damage, it is an object of the present invention to provide a liquid jet recording device equipped with a mechanism for idle discharge that does not impair recording speed. Still another object of the present invention is to achieve a function of removing ink mist generated in the recording area from the recording area space by using a conveyor belt that normally conveys the recording medium, thereby reducing the size of the apparatus and ink. The object of the present invention is to provide a liquid jet recording device that can efficiently remove mist. (Means for Solving the Problems) The present invention provides a recording means for recording by discharging liquid, a rotary conveying means for conveying a recording medium to which liquid is applied by the recording means, and a surface of the conveying means. A liquid jet recording apparatus is provided, characterized in that it is equipped with a recovery means for causing liquid to be ejected from the recording means. The present invention also provides a recording means that performs recording by discharging liquid, a conveyor belt that moves endlessly to convey the recording medium to which the liquid is applied by the recording means, and a conveyor belt that electrostatically attaches the recording medium to the conveyor belt. A conveying means having a conveyor belt charging means for attracting the conveyor belt, and after the recording means finishes recording on the recording medium, the conveyor belt charged by the charging means is transferred to a recording area by the recording means at least in an area corresponding to the recording area. There is provided a liquid jet recording apparatus characterized by comprising a control means for supplying the liquid by the length in the conveyance direction, and a means for cleaning the conveyance belt. Furthermore, the present invention creates bubbles in the liquid due to film boiling by supplying an electric signal corresponding to the recording signal to a recording head equipped with an electrothermal conversion element for forming bubbles in the liquid by applying thermal energy. a recording unit that includes a recording head that forms and jets a liquid onto a recording medium and has a discharge section that has a length corresponding to the width of the recording medium in the conveying direction;
An endless conveyor belt for electrostatically adsorbing recording media;
A liquid jet recording apparatus is provided, comprising: means for charging the conveyor belt, including the surface of the conveyor belt located between the plurality of recording media, when the conveyor belt is in a multiple recording medium conveyance mode.

The most desirable form of the present invention is to supply an electric signal corresponding to a recording signal to a recording head equipped with an electrothermal conversion element for forming bubbles by applying thermal energy into a liquid. a recording means that includes a recording head that forms bubbles in the liquid by film boiling and injects the liquid onto the recording medium, and has a discharge section with a length corresponding to the width of the recording medium in the conveying direction; an endless conveyor belt for electrostatic adsorption; a means for charging the conveyor belt, including a surface of the conveyor belt located between the plurality of recording media in a plurality of recording medium conveyance mode of the endless conveyor belt; and: the recording means control means for supplying the conveyor belt charged by the charging means to the recording area of the recording means by at least a length in the conveying direction corresponding to the recording area after completing recording on the recording medium by: and a means for cleaning the conveyor belt, and the control means supplies the conveyor belt until the charged surface of the conveyor belt passes through the cleaning area of the cleaning means after the recording is completed, and The means provides a liquid jet recording apparatus which is a color means and has four of the above-mentioned recording heads in close proximity to each other to enable full color recording.
(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. No. 11 shows an embodiment of the present invention. here,
1 is a recording head, and 3456 nozzles are provided at an interval of 16 dots/Il on the bottom surface of the figure, and 216 mm wide recording is performed line-sequentially. Also, the recording head l is compatible with four color inks: black, cyan, magenta, and yellow, and the la. lb. lc. There are four ld. FIG. 2 is a perspective view of the recording head, where 31 is an aluminum head base, 32 is a silicon substrate with a heating element arranged in the nozzle 34, 33 is a glass force bar that constitutes the common ink chamber 35 and the sozzle 34; 36 is a driver for a heating element, and 37 is an ink discharge tube that discharges ink supplied from the ink supply tube 5 to the common liquid chamber 35 to an ink tank. 40 is the orifice surface. Each recording head is held by a holder 2 so that the nozzle spacing in the recording paper conveying direction is constant. A head unit composed of four recording heads and a holder can be moved up and down by a head movement step 24 (not shown). 3 is a cap that is attached to the orifice surface 40 forming the nozzle of the recording head when not recording. As shown in FIG. 3 (this figure shows the case where the recording head l and the cap 3 are arranged on the same straight line), the cap 3 has a sponge-like ink absorbing member 29 inside, and the It is configured to receive idle ejection of ink. Furthermore, a nozzle presser rubber 30 is arranged at the upper end of the cap to cover the length of the nozzle row. The cap 3 is movable in the X direction by a cap moving means (not shown). 4 is an ink tank corresponding to each recording head, and ink is guided to the recording head via an ink supply tube 5. Ink is supplied using the capillary phenomenon of the nozzles of the recording head, and the head of the ink in each ink tank is set a certain distance lower than the nozzle surface. 38 is an ink circulation bomb that supplies ink into the head under pressure. In addition, 3
7 is an ink return tube, and the ink supplied into the head under pressure is returned to the ink tank 4 through the ink return tube 37. 6 is a seamless belt for conveying the recording paper, which has a high resistance layer (about 10Ωcm) with a thickness of about 50 μm on the surface, and the inner surface is grounded by an idle roller.
The surface is charged to about 1500V by the charger 12a. The recording paper 27 is injected with a negative charge by the charger +2b and is conveyed by being electrostatically attracted to the belt surface. The belt 6 is rotated by a motor 8 connected to a belt drive roller 7 in a direction to move the recording paper 27 in the X direction. 9 is an idle roller for pulling the belt, and 10 is a tension roller for applying a constant tension to the belt. Reference numeral 11 denotes a pinch roller that presses the recording paper against the belt before and after the charger to strengthen the adsorption.The pinch roller 11a and the belt in that area receive the recording paper fed and loop it inside the guide 13, so that the leading edge of the recording paper is It also has the function of improving orthogonality with the X direction. The recording paper 27 is fed one sheet at a time from the cassette 26 by the supply roller 16, is nipped by the conveyance roller 14j5 and the vinyl roller l5, and guided to the front and rear registration roller equivalent portions 11a. Reference numeral 17 denotes a cleaning unit that removes paper dust, idle ink, etc. on the belt 6. 18 is a paper discharge tray on which recorded recording paper is loaded. Next, we will discuss the operation of the liquid injection device constructed in this way. Figures 4 to 9 are side views of the head unit and the vicinity of the cap. Figure 4 shows the state in which the power is OFF, and the cap 3 covers the surface of the orifice, preventing ink from evaporating from the nozzle tip. When the power is turned on from this state, the head unit is first lifted by the head moving means about L1 (Fig. 5). If there is a circulation signal in this state, the cap unit is moved by the cap moving means 25 in the opposite direction to the X direction by a distance L shown in FIG. 3 (FIG. 6), and then the head is lowered (FIG. 7). ), the ink circulation is performed by operating the ink circulation pump 38, the head unit is raised (Fig. 6), and the cap unit is also returned to its original position (Fig. 5). Note that the ink circulation removes air bubbles in the ink supply tube 5 and the recording head. Next, if there is a dry ejection signal, all nozzles perform dry ejection a predetermined number of times. The idle ejection in this case is the idle ejection at the start of recording, and is therefore performed toward the ink absorbing member 29. Note that blank firing is normal. This is done when the power is turned on and between sheets during continuous paper feeding, but the system is configured so that the user can input a signal by pressing a button if uneven recording occurs. Next, the cap unit is moved in the opposite direction to the X direction by the cap moving stage 25, and is placed in a position where the cap is accommodated between each head (FIG. 8). Then, the head unit is lowered and the nozzle tip is set at a distance of approximately 4 mg+ from the belt surface (Figure 9). Next, the paper feed motor is turned on, one recording paper in the cassette 26 is picked up by the paper feed roller 16, and the guide l3
and is sandwiched between the conveyance roller 14 and the pinch roller l5. The passage of the leading edge of the recording paper is detected by a photo sensor just before the registration area, and the paper feed motor is activated a predetermined time after the leading edge reaches the registration area. The excess recording paper fed at this time forms a loop within the space of the chevron guide 13, and due to the stiffness of the recording paper, the leading edge follows the registration area, ensuring orthogonality with the conveyance direction. Next, the belt motor 8 and charger l2 are ONL,
The recording paper is guided between the chargers 12b while being pressed against the belt 6 by the pinch roller 11a. The surface of the belt is charged to about 1500 V by a charger 12a, and a negative charge is injected into the recording paper by the charger 12b, and the recording paper is attracted to the belt due to the electrostatic force with the positive charge on the belt surface. Moreover, the adhesion becomes more reliable due to the pressure contact of the pinch roller after passing through the charger 12b. The feeding of the recording paper is counted in synchronization with the activation of the belt motor, and each color is recorded when the leading edge of the recording paper reaches each recording head. The recording paper on which recording has been completed is curvature-separated from the belt at the belt drive roller 7, and is discharged to the paper discharge tray l8. After paper ejection is completed, the belt motor 8 is turned OFF.
Charger l2 is also turned off. Here, if the next recording is not performed, the head unit is raised (Fig. 8), the cap unit is set (Fig. 5), and the head unit is lowered and attached to the cap unit (Fig. 4). , the power is turned off. In addition, when recording the next page, the presence or absence of a blank ejection signal is detected, and if there is a signal, the head unit remains as it is (Fig. 9) and the blank discharge is performed on the belt between sheets. After that, if there is no signal, the paper feed motor is immediately turned ON and the same recording sequence as for the first sheet is repeated. The ink ejected onto the belt is wiped off by a cleaning unit 17. A flowchart of the above operation is shown in Fig. 10. When dry ejection is performed for each sheet, for example, several pulses may be used for one dry ejection. Therefore, the idle ejection according to this embodiment can be performed with a sufficient space between sheets, and the throughput in continuous paper feeding, that is, the recording speed is not impaired.
Incidentally, it is necessary to perform idle ejection when no recording is performed for 1 to 2 minutes, and it is also possible to perform idle ejection every few to several tens of sheets depending on the recording speed of the apparatus. Furthermore, in this embodiment, since the recording paper is attracted to the belt by electrostatic attraction, the ink mist during idle ejection can be absorbed onto the belt, making it possible to provide a highly reliable recording apparatus that does not easily stain the inside of the apparatus. In this embodiment, electrostatic adsorption using a belt is used as the recording paper conveying means, but it is obvious that various other methods can be considered as the conveying means, such as air adsorption using a belt or a system using a drum. A liquid jet recording apparatus according to the present invention includes a means for transporting a recording material, a means for cleaning the transport means,
Since it has a recording head control means that ejects recording liquid onto the conveyance means, there is no need to retreat the recording head from the recording position, and it is possible to perform high-speed recording without compromising the throughput in continuous paper feeding, that is, the recording speed. be. Furthermore, when the recording material is conveyed by electrostatic adsorption with a belt, the ink mist during idle ejection can be adsorbed onto the belt, making it possible to obtain a highly reliable recording apparatus in which the inside of the apparatus is less likely to become contaminated. Ink is supplied to the recording head through tube 5.
f5a. 5b. 5c. Although it is only done by 5dl, the delivery tube 3 7 f37a. 37b. 37c.
37 dl can be supplied from the ink tank to the head from both tubes 5.37 to the head using only the capillary force generated as the ink is consumed by the head. This has the effect of improving recording. This is a desirable configuration. The structure of the head moving means 24 in the above embodiment may be any structure as long as it can integrally move the head group in the upward and downward directions. Specifically, it may be possible to control the on/off of a lift plunger or to control a cam. Any of the means used as a moving drive transmission member can be applied. The cap moving means 24
As long as the cap group can be moved as a unit, any configuration is acceptable. Specifically, a slide mechanism using a plunger and pulley rail for parallel movement or a guide rack and binion mechanism may be used. In the above embodiment, since the conveyor belt 6 that electrostatically attracts the recording medium is charged until the recording medium is ejected, the recording head l
a. Ib. lc. Even after the recording is completed, the charged conveyor belt 6 remains (carried in) in the microgap between the belt and the head in the recording area formed by the ld. Therefore, the ink mist generated during recording can also be adsorbed to the conveyor belt in the same way as the ink mist during idle ejection.

In other words, even if there is ink mist that remains in the recording area after printing is finished, it will be improved by the charged conveyor belt.
You can create an environment suitable for the next recording. In this way, the presence of the ink mist during printing could be removed if the surface of the conveyor belt carrying the recording medium and the charged conveyance belt passed through the recording area after the recording was completed. The effect of charging the conveyor belt can be further improved by charging the conveyor belt over an area corresponding to a length corresponding to the recording area in the conveyance direction or more. In addition, the conveyor belt has a width larger than the recording medium, and the charging is performed over a width wider than the recording medium that can be conveyed, so the tendency of the ink mist during recording to move toward the edge can be fully utilized. The ink mist effect can be achieved by In addition, by ensuring the maximum charging width for small-sized paper other than the maximum transportable size paper, the ink mist removal effect can be fully demonstrated, making it possible to maintain excellent recording without complicating the configuration. ．． If this ink mist adheres to the recording head itself, it will require cleaning the recording head with a cleaning blade as a recovery means, which will increase the number of recording repeats.
Although this sometimes increases the percentage of empty discharges, implementing the invention described above has resulted in a significant improvement. In addition, when conveying continuous recording media, a predetermined interval is usually provided between two consecutive recording media, but even in this conveyance mode, by charging the surface of the conveyor belt at this predetermined interval, the entire width of the recording area is covered. It goes without saying that the ink mist removal effect can be achieved even without dry ejection. Note that if the conveyor belt receives dry ejection or adsorbs ink mist, it is preferable to clean those areas immediately, so even if the conveyance of the recording medium becomes unnecessary due to ejection, these areas will not be affected by the cleaning action. It is preferable to move the conveyor belt until it passes through the area. Further, the conveyor belt may be provided with an ink absorbing layer and the ink absorbing layer may be squeezed out by a pair of squeezing rollers serving as ink removing means instead of a cleaning member, which is also included in the cleaning means of the present invention.

The present invention includes all inventions of parts of the above embodiments or combinations thereof. In this embodiment, since the recording medium itself is also electrically charged, uncharged conductive ink or dielectric ink receives a dielectric charge and has the effect of adsorbing ink mist, so this is a preferable configuration. ．． In this case, it is particularly effective for scanning recording heads. The present invention brings about excellent effects particularly in recording heads and recording apparatuses using the bubble jet method among ink jet recording methods. The reason for this is that when moving the print head to perform dry ejection, or when creating an air flow to increase the amount of air blown to remove a large amount of ink mist, the heat loss near the print head becomes large. However, according to the present invention, these problems can be solved.

In particular, since the increase in ink mist can be substantially reduced, the present invention is also excellent in that even when airflow is used to remove ink mist, the airflow itself can be reduced. As for typical configurations and principles thereof, it is preferable to use the basic principles disclosed in, for example, US Pat. No. 4,723,129 and US Pat. No. 4,740,796. This method can be applied to both the so-called on-demand type and continuous type, but especially in the case of the on-demand type, it is necessary to arrange the liquid (ink) in accordance with the sheet and liquid path that hold it. The electrothermal converter is
The electrothermal transducer generates thermal energy by applying at least one drive signal that corresponds to recorded information and causes a rapid temperature rise exceeding nucleate boiling, thereby producing film boiling on the thermally active surface of the recording head. This is effective because it results in the formation of bubbles in the liquid (ink) that correspond one-to-one to this drive signal. The growth of this bubble. The contraction causes liquid (ink) to be ejected through the ejection opening to form at least one drop. If this drive signal is in the form of a pulse, bubble growth and contraction will occur immediately and appropriately.
Particularly responsive liquid (ink) ejection can be achieved.
More preferable. This pulse-shaped drive signal is described in U.S. Pat. No. 4,463,359 and U.S. Pat.
The ones listed in the specification are suitable. Further, if the conditions described in US Pat. No. 4,313,124 concerning the temperature increase rate of the heat acting surface are adopted, even more excellent recording can be performed. The configuration of the recording head is a combination configuration of an ejection port, a liquid path, and an electrothermal converter as disclosed in each of the above-mentioned specifications (
U.S. Pat. No. 45 discloses a structure in which a heat acting part is arranged in a bending region in addition to a straight liquid flow path or a right-angled liquid flow path.
The present invention also includes configurations using the specifications of No. 58333 and US Pat. No. 4,459,600. In addition, Japanese Patent Application Laid-open No. 123670 of 1982 discloses a configuration in which a common slit is used as a discharge part for a plurality of electrothermal converters, and a hole that absorbs pressure waves of thermal energy is disclosed. Japanese Unexamined Patent Application Publication No. 1983-1989 discloses a configuration in which the
The effects of the present invention are also effective even with a configuration based on Publication No. 138461. Furthermore, as a full-line type recording head having a length corresponding to the width of the maximum recording medium that can be recorded by the recording apparatus, the length can be increased by combining multiple recording heads as disclosed in the above-mentioned specification. Either a configuration that satisfies the above requirements or a configuration as a single recording head integrally formed as described above may be used, but the present invention can more effectively exhibit the above-mentioned effects. In addition, a replaceable chip-type recording head that is attached to the device body enables electrical connection to the device body and ink supply from the device body, or a chip-type recording head that is installed integrally with the recording head itself. The present invention is also effective when a cartridge type recording head is used. Further, it is preferable to add recovery means for the recording head, preliminary auxiliary means, etc., which are provided as a configuration of the recording apparatus, to the present invention because the effects of the present invention can be further stabilized. Specifically, these include caving means, cleaning means, pressurizing or suction means, electrothermal transducer or other heating element, preheating means combining these, recording and It is also effective to perform a preliminary ejection mode in which a different ejection is performed for stable recording. Furthermore, the recording mode of the recording device is not only a recording mode for mainstream colors such as black, but also a recording mode for only mainstream colors such as black.
The recording head may be configured integrally or by a combination of multiple pieces, but it may be composed of multiple colors of different colors or ? I! The present invention is also extremely effective for devices equipped with at least one color-based full-force color. A conveyance member suitable for the present invention is preferably an endless rotating member that is uniformly charged and has a smooth surface that prevents ink from passing through. (Effects of the Invention) As described above, the present invention allows the recording medium conveying member to hold the liquid discharged from the recording head that does not perform recording image formation itself, which results in an increase in the size of the apparatus. This invention was able to significantly reduce the throughput during recording without having to do so. In particular, the present invention is particularly effective for full-line color printing devices in which the printing head has become larger as the device becomes color-oriented. This is preferable because it eliminates the need for return time for the recording head.

[Brief explanation of the drawing]

FIG. 1 is an overall explanatory diagram of an embodiment of the present invention, FIG. 2 is a perspective view of the recording head in FIG. 1, FIG. 3 is a sectional view of the cap in FIG. 1, and FIGS. FIG. 1 is a side view of the head unit and cap for explaining their operations in FIG. 1, and FIG. 10 is a first operation flowchart. l...1 recording head, 3...cap, 4...ink tank, 6...-belt, l2...charger. 16.
-・Paper feed slot-ra, 17...Cleaning unit,
18... Wandering paper tray, 27... One recording paper, 38...
Ink circulation pump.

Claims (1)

[Scope of Claims] 1. A recording means for recording by discharging liquid, a rotary conveying means for conveying a recording medium to which the liquid is applied by the recording means, and a surface of the conveying means from the recording means. 1. A liquid jet recording apparatus comprising a recovery means for ejecting a liquid. 2. The liquid jet recording apparatus according to claim 1, further comprising means for removing the liquid from the conveying means that has received the liquid ejection. 3. The liquid jet recording apparatus according to claim 1, wherein the conveying means includes a conveying belt that electrostatically attracts the entire surface of the recording medium, and means for charging the conveying belt. 4. The liquid jet according to claim 1, wherein the recovery means discharges the liquid onto the surface of the conveying means between the recording media when the conveying means is in a mode of conveying a recording medium cut to a predetermined size. Recording device. 5. A recording device that performs recording by ejecting liquid, a conveyor belt that moves endlessly to convey the recording medium to which the liquid is applied by the recording device, and a conveyor that electrostatically attracts the recording medium to the conveyor belt. a conveying means having a belt charging means; after the recording means finishes recording on the recording medium, the conveying belt charged by the charging means is moved to a recording area by the recording means in the conveying direction at least in an area corresponding to the recording area; What is claimed is: 1. A liquid jet recording apparatus comprising: a control means for supplying a length corresponding to the length of the conveyor belt; and a means for cleaning the conveyor belt. 6. The liquid jet recording apparatus according to claim 5, further comprising a recovery means for ejecting the liquid from the recording means onto the surface of the conveyor belt which is charged as described above but does not attract a recording medium. 7. The liquid jet recording apparatus according to claim 5, wherein the conveyance means includes a member that presses the recording medium against the charged surface of the conveyance belt before reaching the recording area. 8. The liquid jet recording apparatus according to claim 5, further comprising a recording medium charging means for charging the recording medium with a polarity opposite to that of the charging means. 9. The recording means includes a full-line recording head that discharges liquid through a minute gap with the recording medium and has a discharge section having a length corresponding to the width in the moving direction of the recording medium for different liquid discharges. 6. The liquid jet recording apparatus according to claim 5, wherein the liquid jet recording apparatus has a plurality of liquid jet recording apparatuses, and performs recording while being fixed at a recording position within the apparatus. 10. a moving means for moving the recording means between the recording position and a position that is larger than the minute gap and farther from the conveyor belt when not recording; and a cap member that covers the liquid ejection part of the recording means; Liquid jetting according to claim 9, further comprising means for inserting the cap member between the recording means separated by the moving means and the conveyor belt, and forming a capping form by the cap member during non-recording. Recording device. 11. The recording means has an electrothermal conversion element for forming bubbles by applying thermal energy into the liquid for ejecting the liquid, and the element converts into the liquid in response to an electric signal corresponding to the recording signal. The liquid jet recording device according to claim 5, which causes film boiling. 12. The liquid jet recording apparatus according to claim 10, further comprising a recovery means for ejecting the liquid from the recording means onto the surface of the conveyor belt which is charged as described above but does not attract a recording medium. 13. The recording means has an electrothermal conversion element for forming bubbles by applying thermal energy into the liquid for ejecting the liquid, and the element converts into the liquid in response to an electric signal corresponding to the recording signal. 13. The liquid jet recording device according to claim 12, which causes film boiling. 14. Forming bubbles in the liquid by film boiling by supplying an electric signal corresponding to the recording signal to a recording head equipped with an electrothermal conversion element for forming bubbles by applying thermal energy to the liquid. a recording device equipped with a recording head that injects liquid onto a recording medium and has a discharge portion having a length corresponding to the width of the recording medium in a conveying direction; an endless conveyor belt that electrostatically attracts the recording medium; A liquid jet recording apparatus comprising: means for charging the conveyor belt, including the surface of the conveyor belt located between the plurality of recording media, in a plurality of recording medium conveyance mode of the conveyor belt. 15. The liquid jet recording apparatus according to claim 14, wherein the recording means is a color recording means having four of the recording heads in close proximity to enable full color recording. 16. After the recording means finishes recording on the recording medium, supplying the conveyor belt charged by the charging means to the recording area of the recording means for at least a length corresponding to the recording area in the conveyance direction; The liquid jet recording apparatus according to claim 14, comprising: a control means; and a means for cleaning the conveyor belt. 17. After the recording means finishes recording on the recording medium, the conveyor belt charged by the charging means is moved to the recording area of the recording means for at least a length in the conveying direction corresponding to the recording area. Claim 1, further comprising: supply control means; and means for cleaning the conveyor belt.
6. The liquid jet recording device according to 6. 18. The control means supplies the conveyance belt until the charged surface of the conveyance belt passes through a cleaning action area by the cleaning means after the end of the recording.
The liquid jet recording device described in . 19. The control means supplies the conveyance belt until the charged surface of the conveyance belt passes through a cleaning action area by the cleaning means after the end of the recording.
The liquid jet recording device described in .