JPH07101121A - Ink jet printing method and apparatus therefor - Google Patents

Abstract

PURPOSE:To perform printing on a stretchy article being printed, by an ink jet printing apparatus in high quality and at a low cost. CONSTITUTION:While a length of cloth B is conveyed by a conveying mechanism 50, an adhesive is jetted toward a conveyor belt 51 from a nozzle 61, so that the cloth is fixed to a conveying surface of the belt by the adhesive to suppress stretching and contraction of the cloth. Also, an angle of rotation of a measuring roller 71 caused by movement of the belt is measured by an encoder 72, and an amount of movement of the belt and hence a feed amount of the cloth is controlled depending upon the measuring result to compensate for a variation in the feed amount of the cloth due to stretching and contraction of the belt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet printing method and apparatus capable of preventing printing quality from deteriorating due to a change in the feed amount of an object to be printed and printing with good printing quality.

[0002]

2. Description of the Related Art An ink jet printing apparatus prints by moving ink jet heads relative to a carriage and an object to be printed while ejecting ink droplets successively from nozzles of the head toward the object to be printed. , For example, a charge electrode gives a charge according to print information to an ink droplet ejected from a nozzle and flying toward a printing object, and then, a flight direction of the charged ink droplet is formed between the deflection electrodes. It is deflected by an electric field so that ink droplets are attached to positions corresponding to print information on an object to be printed for printing.

Due to the relative movement of the ink jet head and the material to be printed, in a serial type ink jet printing apparatus, main scanning for moving the carriage along the material to be printed and sub scanning for moving the material to be printed in a direction orthogonal to the carriage moving direction. And are done. Further, in the line type, which includes an inkjet head having a plurality of nozzles arranged over the entire width of the printed material in a direction (printed material width direction) orthogonal to the direction in which the printed material moves, only sub-scanning is performed. And in any type of printing device,
Each time the head prints once, printing for one scanning line is performed.

If there is a change in the amount of movement of the printed material, that is, the amount of feed, due to sub-scanning, the print quality will deteriorate. In other words, if the feed amount of the printing material is too large, there is a gap between the trailing edge of the printed image portion printed immediately before feeding and the leading edge of the printed image portion printed immediately after feeding, and While white stripes are generated, if the feed amount is too small, adjacent edges of image portions to be printed one after another overlap each other to cause black stripes in a printed image.

In order to solve such a problem, it is known to detect the feed amount of the printed material and control the feed amount to an appropriate value. For example, in a printing apparatus including a transport mechanism configured to feed a print target by winding the print target with a take-up roller, the print feed amount is obtained from the rotation angle of the take-up roller, and the take-up roller rotation amount is calculated. As a result, the feed amount of the printing material is controlled.

Further, in a printing apparatus equipped with a printing material conveying mechanism of a type for sending a printing material using an endless belt stretched between a driving roller and a driven roller, the rotation angle of the driving roller is detected and the detection roller rotation is detected. The feed amount of the printed material is obtained from the angle, and the rotation amount of the drive roller and thus the feed amount of the printed material are controlled according to the result.

[0007]

However, in the case of a highly stretchable material to be printed, when the tension force is applied to the belt as the take-up roller rotates, the material to be printed stretches, and the elongation is considerably increased. If it becomes large, the printed material shrinks due to the reaction force generated in the printed material, so the printed material feeding amount obtained from the winding roller rotation angle does not exactly match the actual feeding amount. It is difficult to maintain the feed amount at an appropriate value and improve the print quality even if the feed amount control of the printed material is performed.

Further, the belt used in the belt type printing apparatus has a considerable degree of elasticity, and when a tensile force is applied to the belt as the driving roller rotates, the belt extends between the driving roller and the driven roller, and If the elongation of the belt increases to a considerable extent, the belt contracts while rotating the driven roller due to the reaction force generated in the belt, so the belt feed amount obtained from the drive roller rotation angle is strictly the same as the actual belt feed amount. There are times when you don't.

Further, in a large-sized printing apparatus, since the roller diameter is large, in order to control the belt feed amount with a required accuracy, the rotation angle control of the drive roller is performed with high resolution and the circularity of the roller is controlled. And so on. In this case, a high-precision motor is required and the printing material conveying mechanism is complicated, resulting in high cost. Therefore, it is an object of the present invention to provide an inkjet printing method and an apparatus therefor capable of performing printing with good print quality and at low cost even on a stretchable substrate.

[0010]

According to the present invention, there is provided an ink jet printing method in which an ink droplet ejected from a nozzle of an ink jet head reaches a desired position on a printing object to perform printing, and the ink jet printing method is arranged so as to face the ink jet head. It is characterized in that the material to be printed is fixed and moved on the conveyed conveyor belt.

Preferably, the material to be printed is fixed to the conveyor belt with an adhesive. Preferably, the belt movement amount is measured, and the conveyance belt is moved according to the measured conveyance belt movement amount. Further, in an inkjet printing apparatus that includes an inkjet head having a nozzle for ejecting ink as an ink droplet and prints by making the ink droplet reach a desired position on a printing object, the present invention is opposed to the inkjet head. A transport belt stretched between the transport rollers arranged in the same manner, a drive means for rotating the transport roller, and a fixing means for securing the printing material to the transport belt. .

[0012] Preferably, the fixing means includes an adhesive applying means for applying an adhesive to the conveyor belt. Preferably, the inkjet printing apparatus further includes a measurement roller for converting the movement amount of the conveyor belt into a rotation angle, and a rotation angle measurement unit for measuring the rotation angle of the measurement roller, and the drive unit is a rotation unit. The transport roller is rotationally driven according to the rotation angle measured by the angle measuring means.

Preferably, the ink jet printing apparatus is
The measuring roller includes a head moving mechanism for moving the inkjet head in a direction orthogonal to the moving direction of the conveyor belt, and the measurement roller is provided on or near the inkjet head moving axis. Preferably, the inkjet head has a plurality of nozzles arranged in a direction orthogonal to the moving direction of the conveyor belt, and the measurement roller is provided on or near the arrangement axis of the plurality of nozzles.

[0014]

According to the method of the present invention, an object to be printed, for example, a cloth having low rigidity and high elasticity is fixed to the conveyor belt by using, for example, an adhesive. As a result, the expansion and contraction of the printed material and thus the variation in the feed amount of the printed material are suppressed, and the print quality is improved. In a preferred aspect of the method of the present invention, the transport belt is moved according to the measured transport belt movement amount, whereby the influence of expansion and contraction of the transport belt on the feed amount of the printing material is removed, and the print quality is further improved.

Further, according to the apparatus of the present invention, the material to be printed is fixed by the fixing means to the conveying belt stretched between the conveying rollers. Preferably, the material to be printed is fixed to the conveyor belt by the adhesive applied to the conveyor belt by the adhesive application means. In a preferred mode of the apparatus of the present invention, the rotation angle of the measuring roller is measured by the rotation angle measuring means, and the conveying roller is rotationally driven according to the moving amount of the conveying belt and thus the measuring roller rotating angle representing the feed amount of the printing material. Thereby, the feeding amount of the printing material is controlled to an appropriate value, and the printing quality is improved.

A preferred embodiment of the present invention in which the ink jet head is moved in a direction orthogonal to the moving direction of the conveyor belt, or the present invention in which a plurality of nozzles are arranged in a direction orthogonal to the moving direction of the conveyor belt. In a preferred embodiment, the measuring roller provided on or near the inkjet head moving axis or the nozzle array axis,
The amount of belt movement in the area where the ink droplets are printed is measured. As a result, the print quality is further improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An ink jet printing apparatus according to an embodiment of the present invention will be described below with reference to FIGS. The inkjet printing apparatus includes an ink supply device including an ink tank 5 for storing ink and a pump 4 for sucking ink from the tank 5 and pressurizing the ink.
In addition, an electrostatic deflection type inkjet head 30 for ejecting ink droplets A toward a cloth B as a printing object,
The controller 6 for driving and controlling the head 30 is provided.

The ink jet head 30 has a nozzle unit 1 including one ejection nozzle 2 and a piezoelectric vibrating element 3.
have. The ejection nozzle 2 is connected to an ink tank 5 via a pump 4, and ejects ink from a nozzle hole (not shown) formed at the tip of the nozzle 2. Further, the piezoelectric vibrating element 3 is electrically connected to the drive circuit 7 of the controller 6, and vibrates at a predetermined frequency according to the output voltage of the constant cycle supplied from the drive circuit 7, thereby causing the nozzle 2 to move. The columnar ink ejected from the nozzle 2 is vibrated and divided to generate granular ink droplets A.

The ink jet head 30 further includes a charging electrode 8 arranged immediately in front of the discharge nozzle 2 and a pair of deflection electrodes 11 and 12 arranged in front of the same electrode 8. The charging electrode 8 is formed, for example, in the shape of a hollow cylinder and is arranged on the same axis as the ejection nozzle 2.
The ink droplet A ejected from is passed through the hollow portion of the charging electrode 8. The charging electrode 8 is connected to the charging circuit 9 of the controller 6.

The charging circuit 9 is a print pattern generating circuit 10
The pulse voltage level to be supplied to the charging electrode 8 is sequentially determined based on a series of print information signals supplied from the discharge nozzle 2, and the pulse voltage having the determined level is discharged at a predetermined timing, that is, from the discharge nozzle 2. Immediately before the individual ink droplets A are generated by the splitting of the formed ink column,
It is designed to be sequentially delivered to the charging electrode 8. As a result, each of the ink droplets A has a size determined by the charging circuit 9 based on the print information signal corresponding to the ink droplet A.
For example, a negative charge will be imparted by the charging electrode 8.

In the ink jet head 30, a pair of deflection electrodes 11 and 12 are arranged so as to face each other with an ink droplet flying path in front of the load electrode 8 interposed therebetween, and one deflection electrode 11 has the ejection nozzle 2 and the charging electrode. 8 extends obliquely with respect to the axis of 8, and the other deflection electrode 12 extends parallel to this axis. Then, while positive output power is applied to the deflection electrode 11 from the drive circuit 7, the deflection electrode 1
2 is grounded, so that an electrostatic field for deflecting the negatively charged ink droplet A to the deflection electrode 11 side is generated between the deflection electrodes 11 and 12.

The ink jet head 30 includes the deflection electrode 1
The gutter 13 is further provided immediately in front of the gutter 2, and the gutter 13 is provided with an opening 14 on the side of the deflection electrode 12. The gutter 13 collects non-charged ink droplets that go straight along the axis of the discharge nozzle 2 and the charging electrode 8 through the opening 14, and collects the collected ink droplets between the bottom of the gutter 13 and the ink tank 5. It is designed to be returned to the ink tank 5 via a connecting conduit.

Referring to FIG. 2, the ink jet printing apparatus includes a head moving mechanism 40 for moving the carriage 31 having the ink jet head 30 in the width direction of the printing object to perform main scanning, and the printing object in the longitudinal direction thereof. And an adhesive for applying an adhesive to the endless belt 51 of the transfer mechanism 50 for carrying out the sub-scan by conveying the print target to the belt 51 by the adhesive. A coating device 60 and a belt movement amount measuring device 70 are further provided.

The head moving mechanism 40 is fixed to a ball screw 41 penetrating the carriage 31 and extending in the width direction of the cloth B, and is fixed to a printer main body (not shown) to drive the ball screw 41 to rotate under the control of the controller 6. And a motor 42. The ball screw 41 is screwed into a ball nut (not shown) provided on the carriage 31, one end of which is connected to the output shaft of the motor 42, and the other end of which is rotatably supported by the printer body. As a result, when the ball screw 41 is rotated in the forward and reverse directions by the motor 42, the carriage 31 and the inkjet head 30 are moved to the ball screw 4 and
It reciprocates along 1.

The printing material carrying mechanism 50 includes a driving roller 52 and a driven roller 53 as a carrying roller, and a motor 54 for rotatably driving the driving roller 52 under the control of the controller 6. An endless belt 51 serving as a conveyor belt is stretched over. The transport mechanism 50 further includes a delivery roller 55 around which the upstream side portion of the cloth B is wound, a winding roller 56 for winding up the downstream side portion of the cloth B, and guide rollers 57 and 58. The motor 56 is driven by a motor (not shown) that rotates synchronously with the motor 54 under the control of the controller 6.

The adhesive applying device 60 as the fixing means is
A nozzle (one of which is indicated by reference numeral 61) for ejecting an adhesive agent to the belt 51 arranged at a proper position below the endless belt 51, and an adhesive agent for the nozzle 61 under the control of the controller 6, for example, It has an adhesive supply part 62 for intermittently pressure-feeding. The nozzle 61 is arranged, for example, on the driven roller 53 side in the longitudinal direction of the cloth B, and directly below both edges of the belt 51 in the width direction of the cloth B.

The belt movement amount measuring device 70 is arranged in contact with or in pressure contact with the endless belt 51 on or near the movement axis of the ink jet head, and is the same as a measuring roller 71 for converting the belt movement amount into a rotation angle. It has an encoder 72 as a rotation angle measuring means for measuring the rotation angle of the roller 71. Although not shown, the encoder 72 includes, for example, a rotating shaft connected to the rotating shaft of the measuring roller 71, a code disc rotatable integrally with the rotating shaft, and light emission arranged on both sides of the disc. And a light receiving unit. The measuring roller 71 has a small diameter, so that the rotation angle of the measuring roller and thus the belt movement amount can be detected with high accuracy without using a high-resolution encoder, and the measuring roller 71 having a high roundness can be used.
Will be easier to manufacture.

An encoder output representing the belt moving amount and thus the actual feed amount of the printed material is supplied to the controller 6,
The controller 6 controls the printing material transport mechanism 5 so that the deviation between the actual feed amount represented by the encoder output and the set feed amount stored in the controller 6 is eliminated.
The motor 54 of 0 is rotationally driven. The operation of the inkjet printing apparatus shown in FIGS. 1 and 2 will be described below.

When the apparatus power is turned on, the controller 6
Under the control of the driving circuit 7, the piezoelectric vibrating element 3 and the pump 4 are activated and a positive voltage is applied to the deflection electrode 11. The ink sucked up from the ink tank 5 by the operation of the pump 4 is pressure-fed to the discharge nozzle 2, and the nozzle 2
Ink is ejected in a column shape. Then, by the operation of the piezoelectric vibrating element 3, the columnar ink is divided to generate granular ink droplets A. Furthermore, a pair of deflection electrodes 11 and 12
As a result, an electrostatic field is formed between the deflection electrodes.

At this time, the charging electrode 8 is in the non-operating state, the ink droplet A is in the non-charging state, and the ink droplet A ejected from the ejection nozzle is the nozzle 2 and the charging electrode 8.
Of the gutter 13 and therefore the opening 14 of the gutter 13
It is collected in the gutter 13 via the. Therefore, the fabric B
The ink droplet A is not printed on the gutter 13
Is returned to the ink tank 5.

After that, when a print start command is sent from the main controller (not shown) to the controller 6, the motor 42 of the head moving mechanism 40 operates under the control of the controller 6 to rotate the ball screw 41, and the ball screw 41 follows the ball screw 41. The movement of the carriage 31 is started. Carriage 31
During the movement of the inkjet head 30 mounted on the cloth B in the width direction of the fabric B, print information corresponding to each of the constituent dots of the first scan line of the print pattern is sequentially sent from the print pattern generation circuit 10 to the charging circuit 9. Charging circuit 9
Then, the pulse voltage level corresponding to the required charging level of each ink droplet A is sequentially determined based on the print information,
The pulse voltage of the level thus determined is sequentially applied to the charging electrode 8 in synchronization with the ink droplet generation timing. As a result, the ink droplet A generated by the vibration of the piezoelectric vibrating element 3 is charged to a required level while flying in the charging electrode 8. Then, while the charged ink droplet A flies between the pair of deflection electrodes 11 and 12, the flight direction of the charged ink droplet A is deflected according to the charging level and reaches the cloth B. On the other hand, the ink droplets A that should not be used for printing are left in the non-charged state, and thus fly along the axis of the ejection nozzle 2 and are collected in the gutter 13 before reaching the cloth B.

While the flight direction of each ink droplet A is controlled as described above, the ink jet head 30 is
The head moving mechanism 40 that operates in synchronization with the ejection of the ink droplets A moves the cloth B along the ball screw 41 in the width direction of the cloth B at a predetermined speed. As a result, individual ink droplets A
Reaches the position corresponding to the print information on the printing surface of the cloth B, and the printing of the first scanning line is performed on the cloth B.

As described above, when the printing for the first scanning line is completed, the motor 54 of the printing material conveying mechanism 50 is moved.
Is driven to convey the endless belt 51 stretched between the drive roller 2 and the driven roller 53 which are rotationally driven by the motor 54, whereby the fabric B moves integrally with the belt 51 and the fabric longitudinal direction. The cloth B is fed to the fabric.

While the cloth B is being fed, the adhesive supply unit 62 of the adhesive application device 60 is activated to operate the supply unit 6 of the same.
The adhesive is, for example, intermittently pumped from the nozzle 2 to the nozzle 61,
The adhesive is intermittently sprayed from the nozzle 61 to both edges of the endless belt 51 and adheres to the cloth conveying surface of the belt 51. As a result, the fabric B delivered from the delivery roller 55 is temporarily fixed to the fabric transporting surface of the endless belt 51 by the adhesive attached to the fabric transporting face. In this way, since the cloth B is fixed to the cloth conveying surface of the belt 51, the expansion and contraction of the cloth B is suppressed by the belt 51, even though the cloth B is highly stretchable and its rigidity is small. The fluctuation of the B feed amount is suppressed.

Further, during the above-mentioned cloth feeding, the measuring roller 71 of the belt movement amount measuring device 70 is operated by the endless belt 5
The rotation amount of the code disk of the encoder 72, which rotates as 1 moves, and which rotates with the rotation of the roller, is detected by the light receiving unit of the encoder 72 as the belt movement amount and thus the cloth feed amount. Here, the measuring roller 71 is
It is provided on or near the axis of movement of the inkjet head. Therefore, the amount of belt movement in the area where printing is performed with ink droplets can be accurately detected by the measuring roller 71.

The controller 6 rotates the motor 54 through the drive circuit 7 by the rotation angle corresponding to the set feed amount, inputs the encoder output representing the actual feed amount by this motor rotation, and then inputs the set feed amount. And the actual feed amount. Then, the controller 6 rotates the motor 54 in the required rotation direction by a required angle in order to reduce the deviation to zero. As a result, the endless belt 5 is fed during the fabric feeding.
Even when 1 stretches, the influence of the belt stretching on the cloth feed amount is removed.

As described above, since the fabric B is fixed to the endless belt 51 and the fabric is fed so that the deviation between the set feed amount and the actual feed amount is zero, the fabric feeding amount is appropriate. Become. Therefore, the fabric feed amount becomes excessive, and there is a gap between the trailing edge of the print image portion printed immediately before the fabric feed and the leading edge of the print image portion printed immediately after the fabric feed, and No white streaks occur.
Further, the cloth feeding amount is not too small, and adjacent edges of image portions to be printed one after another do not overlap with each other, so that a black stripe is not generated in a printed image. That is, the printing on the cloth B is performed with high quality.

The downstream portion of the cloth B is separated from the cloth conveying surface of the endless belt 51 as the cloth is fed,
After that, it is taken up by a take-up roller 56 that is rotationally driven by a motor (not shown) that rotates in synchronization with the motor 54. Then, as in the case of the first scan line, the printing of the second scan line is performed. afterwards,
Printing is sequentially performed on the third and subsequent scanning lines, printing that exactly corresponds to the print information is performed, and the desired character string or image is printed on the fabric B with high quality.

The present invention is not limited to the apparatus of the above embodiment, but can be variously modified. For example, in the above embodiment,
Although the inkjet printing apparatus equipped with the electrostatic deflection type inkjet head has been described, the present invention can be applied to various types of inkjet printing apparatuses. Further, although the fabric B having low rigidity and high elasticity is used as the material to be printed in the above embodiment, the present invention is not limited to the printing paper.
It can be applied to printing on various kinds of substrates such as films.

In the embodiment, the printing material is temporarily fixed to the printing material carrying surface of the carrying belt by using an adhesive application device which intermittently jets the adhesive toward the carrying belt while feeding the printing material. However, the fixing means of the present invention is not limited to this. For example, a brush or the like may be used to apply the adhesive to the conveyor belt in advance. In addition, a cleaning unit for removing stains on the conveyor belt due to application of an adhesive and ink adhered to the belt through the cloth,
For example, a wiper may be provided in the printing device.

Furthermore, in the embodiment, the ink jet printing apparatus provided with the nozzle unit having one nozzle has been described, but the present invention is, for example, a line type printing apparatus having a plurality of nozzles arranged over the entire width of the printed matter. It is also applicable to. In this case, it is preferable to provide the measuring roller on or near the nozzle array axis. Further, in the embodiment, the feeding is corrected by the deviation between the set feeding amount and the actual feeding amount after feeding the printing material, but the feeding control based on the deviation can be variously performed. For example, depending on the deviation between the set feed amount this time and the actual feed amount,
The next set feed amount may be corrected by an amount proportional to the deviation.

[0042]

As described above, in the ink jet printing method in which the ink droplets ejected from the nozzles of the ink jet head are made to reach a desired position on the printing object to perform printing, the present invention is directed to the ink jet head. Since the printed material is fixed on the conveyor belt and moved, the expansion and contraction of the printed material can be suppressed, and therefore, even for the printed material having low rigidity and elasticity, white stripes appear in the printed image. It is possible to perform high-quality printing without black stripes at low cost.

According to the preferred embodiment of the present invention in which the material to be printed is fixed to the conveyor belt with an adhesive, the material to be printed can be easily fixed to the conveyor belt. Further, according to a preferred embodiment of the present invention that measures the belt movement amount and moves the conveyance belt according to the measured conveyance belt movement amount, it is possible to eliminate the influence of expansion and contraction of the conveyance belt with respect to the printed material feeding amount,
The print quality can be further improved.

Further, the present invention is an inkjet printing apparatus provided with an ink jet head having nozzles for ejecting ink as ink droplets to print by making ink droplets reach a desired position on a printing object. Since the conveyor belt stretched between the conveyor rollers arranged so as to face the head, the driving means for rotationally driving the conveyor rollers, and the fixing means for fixing the printing material to the conveyor belt are provided. The expansion and contraction of the printed material can be suppressed, and printing on various printed materials can be performed with high quality.

Further, according to a preferred aspect of the present invention, the fixing means includes the adhesive applying means for applying the adhesive to the conveyor belt, so that the object to be printed can be easily fixed to the conveyor belt. In a preferred aspect of the present invention, which further comprises a measurement roller for converting the movement amount of the conveyor belt into a rotation angle and a rotation angle measurement means for measuring the rotation angle of the measurement roller, the drive means is a rotation angle measurement device. Since the conveying roller is rotationally driven according to the rotation angle measured by the means, the influence of expansion and contraction of the conveying belt can be compensated, and the printing quality can be further improved.

In the preferred embodiment of the present invention, which includes a head moving mechanism for moving the inkjet head in a direction orthogonal to the moving direction of the conveyor belt, the measuring roller is provided on or near the inkjet head moving axis. It is possible to accurately detect the movement amount of the conveyor belt in the area, and thus the feeding amount of the printing material, and thus improve the printing quality.

In a preferred embodiment of the present invention, which comprises an ink jet head having a plurality of nozzles arranged in a direction orthogonal to the direction of movement of the conveyor belt, the measuring roller is arranged on or near the axis of arrangement of the plurality of nozzles. Therefore, it is possible to improve the detection accuracy of the feed amount of the printing material and thus the printing quality.

[Brief description of drawings]

FIG. 1 is a schematic view showing an inkjet printing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view showing the head moving mechanism, the print material conveying mechanism, the adhesive applying device, and the belt moving amount measuring device shown in FIG.

[Explanation of symbols]

 1 Nozzle Unit 2 Ejection Nozzle 3 Piezoelectric Vibration Element 4 Pump 5 Ink Tank 6 Controller 7 Drive Circuit 8 Charging Electrode 9 Charging Circuit 10 Printing Pattern Generating Circuit 11, 12 Deflection Electrode 13 Gutter 14 Opening 30 Inkjet Head 31 Carriage 40 Head Moving Mechanism 41 Ball screw 42 Motor 50 Printed material conveying mechanism 51 Conveying belt (endless belt) 52 Driving roller 53 Driven roller 54 Motor 55 Sending roller 56 Winding roller 57, 58 Guide roller 60 Adhesive coating device (fixing means) 61 Nozzle 62 Adhesive supply Part 70 Head movement amount measuring device 71 Measuring roller 72 Encoder A Ink droplet B Fabric

Claims (8)

[Claims] 1. An inkjet printing method for performing printing by causing ink droplets ejected from nozzles of an inkjet head to reach a desired position on an object to be printed, wherein the transfer belt is disposed on a conveyor belt facing the inkjet head. An inkjet printing method characterized in that a printed matter is fixed and moved. 2. The ink jet printing method according to claim 1, wherein the material to be printed is fixed to the conveyor belt with an adhesive. 3. The inkjet printing method according to claim 1, wherein the amount of movement of the conveyor belt is measured, and the conveyor belt is moved according to the measured amount of movement of the conveyor belt. 4. An inkjet printing apparatus, comprising: an inkjet head having a nozzle for ejecting ink as an ink droplet, wherein the ink droplet reaches a desired position on a printing object to perform printing. A conveyor belt stretched between the conveyor rollers arranged to face each other, a driving means for rotationally driving the conveyor roller, and a fixing means for fixing the printing medium to the conveyor belt. An inkjet printing device characterized by the above. 5. The inkjet printing apparatus according to claim 4, wherein the fixing means includes an adhesive applying means for applying an adhesive to the conveyor belt. 6. A measuring roller for converting the amount of movement of the conveyor belt into a rotation angle, and a rotation angle measuring means for measuring the rotation angle of the measuring roller, wherein the driving means comprises the rotation means. 6. The inkjet printing apparatus according to claim 4, wherein the transport roller is rotationally driven according to the rotation angle measured by the angle measuring unit. 7. A head moving mechanism for moving the inkjet head in a direction orthogonal to a moving direction of the conveyor belt, wherein the measuring roller is provided on or near an inkjet head moving axis. 7. The inkjet printing apparatus according to claim 6, wherein the inkjet printing apparatus is a printing apparatus. 8. The inkjet head has a plurality of nozzles arranged in a direction orthogonal to a moving direction of the conveyor belt, and the measuring roller is on or near an arrangement axis line of the plurality of nozzles. The inkjet printing apparatus according to claim 6, wherein the inkjet printing apparatus is provided.