JP2008132794A - Recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recorder preparing prints which keeps printing quality and reserve capability good in the recorder wherein ink jet recording and recording by an image former of another system are combined. <P>SOLUTION: In the recorder having a variable information printing part which prints variable information outside a printing area of fixed information on a material to be recorded, the variable recording part is an ink jet head which discharges ink having characteristics for hardening by irradiating the variable information recording part with ultraviolet rays, electric beams or the like, and a thickness of an ink drop on a recording body to be printed with the variable information recording part is made a fixing information thickness ±15 μm or a thickness of the ink drop itself is made 15 μm or less. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a recording apparatus, and more particularly to a recording apparatus that combines inkjet recording and recording by an image forming apparatus of another type.

  Recently, a common character / picture part, which is fixed information, is printed on the recording medium in advance by offset printing, letterpress printing, etc., and only necessary information is added to the recording medium as variable information according to customer needs. In other words, so-called reprint printing is performed. The variable information is recorded by a printer capable of printing different contents (variable information) for each part, such as an electrophotographic printer or an inkjet printer.

  A printing method and a printing apparatus for adding variable information to fixed information recorded in advance on such a recording medium are disclosed in Patent Document 1.

Japanese Patent Laid-Open No. 10-58652

  In Patent Document 1, an ultraviolet curable resin is used as a means for recording fixed information. However, an ultraviolet curable resin is used as a means for recording variable information and printing is performed by inkjet. Not. Therefore, when the variable information required by the customer is arbitrarily printed, a printed matter with extremely low image quality is provided for the fixed information.

  Moreover, in the said patent document 1, the relationship between the ink which records variable information, and a to-be-recorded body is not mentioned. Inkjet recording has greatly different print quality depending on the type of ink and the type of recording medium. Therefore, if this point is ignored, a high-quality printed matter cannot be provided.

  On the other hand, as in the present invention, the method of curing the ink with ultraviolet rays or electron beams is suitable for reprinting as an ink-jet ink that can be applied to a recording medium when variable information is added, but much importance is attached to high speed. Since the ink droplets are cured almost simultaneously with the ejection of the ink droplets, there is a possibility that the ink droplets are fixed to the recording medium while having a dome shape that can be discriminated with a finger. This tendency is particularly strong in a recording medium having no ink absorbing layer. In such a printed matter formed of ink droplets formed in a dome shape, when a large number of sheets are stacked and stored, ink show-through, dirt, sticking to other recording media and rubbing stains are generated. Or, when a plurality of recording media are stacked, the rise of only the variable information printing unit has hindered establishment and storage of the recording media.

  As described above, an object of the present invention is to provide a recording apparatus that creates a printed matter with good print quality and storage performance in a recording apparatus that combines inkjet recording and recording by an image forming apparatus of another type.

  In order to solve the above problems, in the present invention, in a recording apparatus including an ink jet head that discharges ink onto a recording medium, the ink jet head uses ultraviolet rays or electrons outside the print area of fixed information on the recording medium. The variable information is printed by ejecting ink having a property of being cured by irradiating a line or the like.

The recording apparatus of the present invention improves the ink thickness, which has been a problem in conventional printers that cure the recording liquid with ultraviolet rays, electron beams, or the like, and combines ink jet recording with recording by other types of image forming apparatuses. It has become possible to provide a recording apparatus with good print quality and storage performance of the product and the recorded product.

  The ink used in the present invention means one having a property of being polymerized (cured) by energy such as ultraviolet rays, electron beams, and other radiation. As shown in FIG. 1, the printed matter of the present invention is obtained by printing fixed information and variable information on the same recording medium. Therefore, the recording order is not particularly problematic when the fixed information can be recorded in a non-contact manner (for example, an ink jet method) or when recording is performed in a state where transfer of variable information ink does not occur.

  In the present invention, it is desirable that the thickness of the printed variable information ink is the same as that of the already printed fixed information record. Specifically, the thickness of the fixed information print thickness may be ± 15 μm. Particularly desirable is -3 to 10 μm, and more desirably −1 to 8 μm. When larger than this, only the predetermined area | region which printed the variable information of the to-be-recorded body becomes thick or thin, and it becomes difficult to maintain a stable shape and the storage performance is inferior as the stacked printed matter increases. In particular, when the thickness is thick, the convex portion of the variable information ink comes into contact with the recording medium and is rubbed, so that ink show-through, dirt, and sticking to the recording medium are likely to occur. On the other hand, when it is thin, the impact of variable information is low. That is, when the thickness of the fixed information is substantially equal to the thickness of the printed material, the thickness of the ink droplets should be 15 μm or less, which is preferable in terms of efficient curing. On the other hand, when the thickness of the fixed information is as thick as 40 μm or more as in the case of foam printing or embossed printing, the thickness of the fixed information is preferably ± 15 μm.

  Hereinafter, an example of a recording apparatus for realizing the present invention will be described with reference to FIG.

  In FIG. 2, reference numeral 1 denotes an ink jet recording apparatus. The recording medium 8 on which the fixed information is recorded is conveyed from the paper feeding unit 2 by the conveying belt 6. Variable information is recorded by the ink jet head 3, and curing and fixing are performed simultaneously with or just after recording by the exposure device 4. A sensor (not shown) for detecting the thickness of the variable information ink is provided in the vicinity of the inkjet head 3 or the exposure device 4, and ink droplets are generated by the processing unit 5 as necessary according to the detection result of the sensor. Adjust the thickness. Further, when the thickness of the ink droplet is increased, or when the height is finely adjusted, the auxiliary ink jet head 10 re-discharges the ink droplet as necessary, and the auxiliary exposure unit 7 performs the curing and fixing. The printed matter on which the variable information is printed is discharged to the stacker 9. The exposure machine 4 uses ultraviolet rays, electron beams, other radiation, and the like.

  With the above configuration, when the thickness of the fixed information is large, the thickness of the variable information can be increased accordingly. That is, as shown in FIG. 2, the variable information printed by the inkjet head 3 and the exposure device 4 can be used. When the thickness of the information does not reach the target thickness, the ink can be ejected by the auxiliary inkjet head 10 and cured by the auxiliary exposure device 7 to make the ink droplets thicker. This operation is repeated a plurality of times as necessary, and the ink droplets can be thickened to an arbitrary thickness.

  In addition, as the exposure machine 4 and the auxiliary exposure machine 7 shown in FIG. 2, an ultraviolet (UV) irradiation lamp, an electron beam, etc. are mentioned. In the UV irradiation lamp, since heat may be generated and the recording medium may be deformed, it is desirable that a cooling mechanism such as a cold mirror, a cold filter, a workpiece cooling, and the like is provided. More preferably, a mechanism for removing ozone is provided. There are high-pressure mercury lamps, ultra-high pressure mercury lamps, metal halides, and the like as lamp types, but ozone-less lamps are preferable. The ultra-high pressure mercury lamp is a point light source, but the DeepUV type, which combines high optical efficiency with an optical system, can irradiate in the short wavelength region. Metal halide is effective for colored materials because of its wide wavelength range. Metal halides such as Pb, Sn, and Fe are used and can be selected according to the absorption spectrum of the photoinitiator. Any lamp that is effective for curing can be used without particular limitation, but a UVA light generator is particularly effective. In the irradiation of ultraviolet rays, the substrate to be printed may be thermally deformed by the heat generated by the ultraviolet lamp. Therefore, it is necessary to use an irradiation device that only emits ultraviolet rays and does not irradiate heat rays. It is. In order to make the curing efficient, it is also effective to form an oxygen barrier film such as polyvinyl alcohol and irradiate it from above.

  In addition, the recording medium to which the variable information ink of the present invention is attached is cured by ultraviolet rays, electron beams or the like, but when printing using a plurality of colors of ink, a plurality of colors of ink are adhered. Later, the recording material may be irradiated with ultraviolet rays, electron beams or the like, or the process of irradiating ultraviolet rays, electron beams or the like for each color may be repeated for each color. In particular, since the ink added with carbon black is inhibited from curing, it is necessary to improve the irradiation efficiency or increase the irradiation energy as compared with other inks. Further, when the fixed information printing is thick like foaming printing or embossing printing, it is necessary to irradiate not only the surface but also the inside with ultraviolet rays, electron beams, etc. when thickening the variable information printing accordingly.

  Next, another example for adjusting the thickness of the variable information will be described with reference to FIG.

  FIG. 3 shows an example of a polishing apparatus attached to the processing unit 5 shown in FIG. The wrapping tape 20 is sent from the supply roll 21 to the polishing roll 22 and further sent to the take-up roll 23. Pressure adjusting devices 24 are provided on both sides of the axis of the polishing roll 22 to adjust the pressing of the wrapping tape 20 to the recording medium 8. The recording medium 8 is sucked and adsorbed by a smooth mounting table 19, and is polished by the wrapping tape 20 by moving in a direction opposite to the direction of travel of the wrapping tape (in the direction of arrow A) at a predetermined speed. The polishing load is preferably 0.3 to 1 MPa. Excessive polishing reduces image quality. Further, the wrapping tape 20 has a function of alternately arranging portions that do not contain abrasive particles and portions not containing abrasive particles, transferring abrasive debris to another roller arranged in parallel in the conveyance direction of the recording medium 8, and removing the abrasive debris. As a result, the image quality can be further improved.

  As the polishing method described above, a conventional method can be used without any particular limitation. For example, a wet grinding method that reduces the thickness by using abrasive particles by buffing or the like, or a lapping tape or abrasive particles to which fine abrasive particles such as alumina running on cured ink droplets adhere There is a method of adjusting the ink thickness by dry polishing with a polishing film or the like dispersed in a resin. In addition, there are methods of polishing with gas or laser or etching.

  Still another example for adjusting the thickness of the variable information will be described with reference to FIG.

  FIG. 4 shows an example of a pressurizing device attached to the processing unit 5 shown in FIG. Pressure adjusting devices 31 are provided on both sides of the shaft of the pressure roller 32 to adjust the pressing of the pressure roller to the recording medium 8. The pressure roller 32 may be a metal roller, a resin roller, or a roller whose surface is covered with a tube such as PFA, polyethylene, polyurethane, or nylon. The recording medium 8 is sucked and adsorbed on a smooth mounting table 19, and is pressurized by a pressure roller in the process of being conveyed at a predetermined speed. Since the pressure applied to the ink is closely related to the hardness of the ink, the step of curing the variable information may be performed before or after pressing, or may be performed before pressing.

  In the above example, the pressure roller is used, but the pressure device may be a press using a flat plate. The pressure may be adjusted so that the thickness of the variable information is 15 μm or less, but is preferably 20 MPa or less, more preferably 10 MPa or less. Excessive pressure reduces image quality. It is also effective to apply silicone oil or the like to the contact surface between the variable information and the pressure device to improve the reliability of the pressure treatment.

  Still another example for adjusting the thickness of the variable information will be described with reference to FIG.

  FIG. 5 shows an example of a heating device added to the configuration of FIG. The conveyance belt 6 that conveys the recording medium 8 is heated by the heater 40, and the recording medium 8 is indirectly heated. Heating is performed during and after printing by the heater 40 disposed opposite to the inkjet head 3 and the exposure device 4 for printing variable information. Thereby, the thickness of the variable information is adjusted. Note that heating after curing is not very effective. In this way, by directly or indirectly heating the recording medium, the viscosity of the ink that has landed on the recording medium is immediately reduced to flow in the longitudinal (penetration) direction and lateral (diffusion) direction of the recording medium. It should be easy. Since the ejection of ink may become unstable when accompanied by hot air, the heating device is preferably provided as part of a platen member that is a transport substrate that supports the recording medium. The heating device may be a ceramic heater or a halogen lamp heater.

  Although it is possible to adjust the thickness of the ink droplets to be ± 15 μm of the thickness of the fixed information ink by the heating device, the heating temperature is preferably the glass transition temperature (Tg) of the resin used is 100 ° C. or less, More preferably, it is 80 degrees or less. The heat treatment may be performed separately before or after heating the step of curing variable information, or may be performed after heating.

  There is no particular limitation on the ink for printing variable information that can be desirably used in the present invention and is cured by irradiating with ultraviolet rays, electron beams, or the like as long as the ink can be stably ejected from the inkjet head. 7 to 40 mPa · s at 25 ° C., and the surface tension is 20 to 40 mN / m.

  Inks used for variable information include relatively low viscosity resin monomers having an unsaturated double bond capable of radical polymerization in the molecular structure, photopolymerizable prepolymers and photoinitiators used in the production of UV curable resins, etc. Consists of These can provide a sufficient storage stability of printed matter as a main component of the ink jet ink. In addition to stable fluidity of the ink, it has a strength that can withstand rubbing and bending the printed image.

  All of these have good wettability to a recording medium and have excellent adhesion to a wide variety of adherend materials. Furthermore, water and a solvent may be added to reduce the viscosity and increase the speed. Any solvent may be used as long as it can dissolve all the constituent components of the variable information ink and evaporate quickly after printing.

  Moreover, when coloring the ink of this invention, colorants, such as dye and a pigment, are mixed. Anything that can be dispersed in the main component, such as inorganic pigments and powdered metals, is treated as ink. The addition amount is appropriately 1 to 20 parts by weight.

  In order to further develop the functionality of the ink of the present invention, various sensitizers, light stabilizers, surface treatment agents, surfactants, viscosity reducing agents, antioxidants, anti-aging agents, crosslinking accelerators, polymerization prohibition An agent, a plasticizer, a preservative, a dispersant, and the like can be mixed. In particular, when it is necessary to make the recording thickness of the variable information thicker than 15 μm, it is effective to add a sensitizer that promotes curing.

  The printing speed of a printer in the field of the invention is particularly effective when it is faster than conventional ink jet recording. Although there is no clear limitation regarding the speed, a recording speed at which the relative speed between the nozzle and the paper is 10 ips (inch / s) or more is particularly preferable. In either case, the relative moving speed between the nozzle and the paper (recording medium) is 10 ips or more. For example, when the head portion is fixed and only the paper moves as in line-type recording, the paper moving speed (paper Feed rate) corresponds to the relative speed. For example, the paper feed speed V of the line type recording is represented by V = f × R by the ink droplet ejection frequency f and the recording resolution R. In the conventional recording of 5 ips or less (usually 1 ips or less), a number of conventionally reported inks can be applied as they are. The present invention can be effectively used in high-speed recording of at least 5 ips, particularly preferably 10 ips or more.

  In a recording medium having low ink absorbability, it is necessary to cure at the same time as ink droplet landing in order to prevent diffusion of ink dots and color mixing between different color inks, and the ink tends to be thicker than recording fixed information. In particular, fixed information is recorded by an inkjet printer that is different from the ink type used in the present invention, such as water-based, oil-based, or solvent-based, such as offset printing, screen printing, laser printer, etc. This is noticeable when this is done. Therefore, the recording medium used in the present invention is not limited to paper such as metal and plastic, and it is particularly preferable when the recording medium is provided with an ink receiving layer. In particular, the penetration of liquid into paper is a complicated phenomenon in which capillary penetration into the voids of the fiber and swelling of the fiber itself are parallel, but the following Lucas-Washburn formula based on a cylindrical capillary model is widely used in the analysis. . The penetration depth H of the liquid is expressed by the following equation using the surface tension γ, the viscosity η, the radius r of the capillary, the penetration time t, and the contact angle θ between the liquid and the capillary.

H = (γ ^{rtcos θ} / 2η) ^0.5
As shown in FIG. 6, when the above equation is plotted with the vertical axis H and the horizontal axis t ^0.5 , it becomes a straight line passing through the origin, but the actual system may bend at some penetration time t _0. Many. The sections roughness exponent (Kr in the figure), the slope (Ka in the drawing) of the absorption coefficient, may be referred to as wetting time t _0. The naming of the section is based on the interpretation that in the initial stage, the ink only wets the surface irregularities of the paper and it takes a certain time (t ₀ ) to start penetrating the substrate. The absorption coefficient of the present invention is the same plot as in the graph of FIG. 6, the penetration depth (ink absorption amount) (vertical axis) is ml / m ² unit, and the penetration time (horizontal axis) is (ms) ^0.5 unit. Is defined as the slope (Ka).

FIG. 7 shows the result of investigation on the recording medium that can be used in the present invention based on the graph of FIG. 6 described above. In FIG. 7, a recording medium having an absorption coefficient greater than 0.7 (ml / m ² ) / (ms) ^0.5, which is a threshold value of the absorption coefficient, such as plain paper, inkjet dedicated paper, and coated cardboard The height of the variable information can be controlled by the ink absorption power of the recording medium itself. The absorption coefficient of the recording medium necessary for controlling the thickness of the variable information is particularly preferably 1.5 (ml / m ² ) / (ms) ^0.5 or more. 10.0 (ml / m ² ) / (ms) A recording material of ^0.5 or more causes an unnecessary back-through phenomenon (ink reaches the back surface), and high-quality recording is difficult to obtain.

On the other hand, in the case of a recording medium having an absorption coefficient of 0.7 (ml / m ² ) / (ms) ^0.5 or less, which is a threshold of the absorption coefficient, such as wide format paper, art paper, etc. If the processing by the processing unit is not performed, it becomes difficult to obtain high-quality printing in which the thickness of the variable information is 15 μm or less and there is no color mixing. However, when the fixed information printing thickness is 100 μm or more, such as foam printing or relief printing, the variable information printing thickness is within the range of ± 15 μm, so the absorption coefficient is not limited to this.

  In order to obtain high image quality, it is desirable that the distance from the nozzle tip to the landing position of the ink droplet is about 1 mm. For the measurement of the permeation rate, there are a Bristow method, a dynamic scanning liquid absorption measurement method that automates this, and the like.

  EXAMPLES Next, although an Example demonstrates this invention concretely, it is not limited to a description example.

  As a vehicle, 10 parts by weight of urethane acrylate (Mitsubishi Rayon, trade name: Diabeam UK6038), 90 parts by weight of neopentyl glycol hydroxypivalate ester di (meth) acrylate (manufactured by Nippon Kayaku, trade name KAYARAD MANDA) And 3 parts by weight of a photopolymerization initiator (manufactured by Ciba Specialty Chemicals, trade name Irgacure 1700) and 4 parts by weight of a black pigment (trade name: MA77) as a colorant are homogenizer (HG30, manufactured by Hitachi Koki). Was dispersed until a homogeneous mixture was obtained at a rotational speed of 2,000 rpm, followed by filtration to remove impurities and the like, thereby obtaining a variable information ink. The results are shown in FIG.

  The viscosity of the ink was measured with a rotational viscometer (EDL model manufactured by Tokimec), and the surface tension was measured with an automatic surface tension meter (CVBP-Z model manufactured by Kyowa Interface Science Co., Ltd.). In either case, the measurement temperature is 25 ° C. The viscosity was 9.5 mPa · s, and the surface tension was 32.5 mN / m.

Using a direct plate making machine (Hitachi Koki SJ02A) while moving the paper at a constant speed, the ink discharge speed is 3 kHz on the paper surface, the paper feed speed is 10 ips, and the resolution is 300 (× 600) dpi. The variable information was printed on coated cardboard (ink liquid absorption coefficient 1.0 (ml / m ² ) / (ms) ^0.5 ) on which fixed information having a thickness of 1 μm was printed by an inkjet printer using aqueous ink. Then, it was cured by irradiating 300 mJ / cm ^{2 with} a UV irradiation device (Ushio Electric, UVC-1212 / 1MNLC3-AA04). The thickness of the ink was 5 μm as measured with a Mitutoyo Digimatic Micrometer. Also, ink bleeding and ink transfer during stack storage were examined. After curing, the coated cardboard is overlaid on the printed matter at a high temperature of 40 ° C., left on it for 6 hours with a 4 kg weight on it, and then the ink transfer and blurring on the surface of the overlaid coated cardboard is examined. Was visually evaluated in three stages. The recorded material with no transfer or blur was evaluated by ◎, the practically recorded material was evaluated by ◯, and the unusable recorded material was evaluated by ×. The rise of the recording part was visually evaluated after recording 5000 sheets. Those that were at a practical level were evaluated as ○, and those that were not evaluated as ×. The recorded matter of Example 1 was found to be at a practical level in any evaluation.

Example 1 with 100 parts by weight of urethane acrylate (manufactured by Taisei Kako, trade name: Acryt WBR-829) as a vehicle and 30 parts by weight of an aqueous cyan pigment dispersion (KIJ200-23-2 from Ciba Specialty Chemicals) as a colorant A uniform variable information ink was obtained in the same manner as described above. The results are shown in FIG. The viscosity was 30.5 mPa · s, and the surface tension was 31 mN / m. The PVC film on which the fixed information is printed by screen printing with a thickness of 10 μm under the same conditions as in Example 1 with the ink heated to 40 ° C. and the viscosity of 15 mPa · s (ink absorption coefficient 0.2 (ml / ml m ² ) / (ms) ^0.5 )) was printed in two colors together with the black ink used in Example 1. Subsequently, the same ultraviolet ray irradiation apparatus as in Example 1 was used to irradiate a light amount of (200 mJ / cm ² ). The thickness of the ink was 36 μm at the dark blue part where the black and cyan inks were overlapped. Therefore, the surface was polished with a polishing apparatus equipped with a tape containing 1.0 μm alumina particles at a load of 5.0 kg / cm ² . By lapping, the ink thickness was 20 μm. The recorded material of Example 2 did not bleed, and it was found that all the evaluations during storage were at a practical level.

A uniform variable information ink was obtained in the same manner as in Example 2 except that a magenta pigment dispersion (manufactured by Orient Chemical Co., Ltd., trade name: MICROPIGMOMRD-2) was used as the colorant. The results are shown in FIG. The viscosity was 7 mPa · s, and the surface tension was 27 mN / m. Printing was performed on a PVC film (ink absorption coefficient 0.4 (ml / m ² ) / (ms) ^0.5 )) on which fixed information was printed by offset printing with a thickness of 2 μm under the same conditions as in Example 1. Then, immediately, the same ultraviolet irradiation apparatus as in Example 1 was irradiated with a light amount of 150 mJ / cm ² . Since the thickness of the ink was 22 μm, it was pressurized by a pressure device. When the metal roller surface was covered with a PFA tube and pressurized with 10 MPa using a roller coated with silicone oil, the ink thickness was 10 μm. The recorded material of Example 4 did not bleed, and it was found that all the evaluations during storage were at a practical level.

A homogeneous variable information ink was obtained in the same manner as in Example 2 except that a yellow pigment aqueous dispersion (product name: MICROPIGMO WMYW-5) was used as the colorant. The results are shown in FIG. The viscosity was 17 mPa · s, and the surface tension was 35 mN / m. PVC film on which fixed information is printed by offset printing under the same conditions as in Example 1 (thickness 1 μm) (liquid absorption coefficient 0.3 (ml / m ² ) / (ms) ^0.5 with the ink)) Printed on. Then, immediately, the same ultraviolet irradiation apparatus as in Example 1 was irradiated with a light amount of 80 mJ / cm ² . Since the thickness of the ink was 18 μm, when the recording medium was heated to 50 ° C. with the heating device shown in FIG. 6, the thickness of the ink was 12 μm. It was found that the recorded matter of Example 4 was evaluated for practical use at the time of storage.

A PVC film (ink absorption coefficient 0.3 (ml / m ² ) / (ms) ^0.5 with fixed information printed by foaming printing (thickness 60 μm) under the same ink and the same conditions as in Example 1. )). Then, immediately, the same ultraviolet irradiation apparatus as in Example 1 was irradiated with a light amount of 80 mJ / cm ² . Since the ink thickness was 25 μm, the fixed information was 35 μm thicker. Therefore, after the same ink was ejected onto the auxiliary head, the light was irradiated again with an ultraviolet irradiation device with an amount of 80 mJ / cm ² , and the ink thickness was 45 μm. It was found that the printed matter of Example 5 was evaluated for practical use at the time of storage.

FIG. 3 is a schematic diagram illustrating an example of a printed material created by the recording apparatus of the present invention. 1 is a schematic side cross-sectional view illustrating an example of a recording apparatus according to the present invention. The schematic sectional drawing of the polish device used as an example of the processing part of the present invention. The schematic sectional drawing of the pressurization apparatus used as an example of the process part of this invention. The schematic sectional drawing of the heating apparatus used as an example of the process part of this invention. The graph which shows the relationship between the amount of ink absorption and penetration time based on a cylindrical capillary model. 6 is a graph showing the relationship between the ink absorption amount of a recording medium and the permeation time. The table | surface shown about the composition and printing result of the ink for variable information used by this invention.

Explanation of symbols

  2 is a paper feeding unit, 3 is an inkjet head, 4 is an exposure unit, 5 is a processing unit, 6 is a conveyor belt, 7 is an auxiliary exposure unit, 8 is a recording medium, 9 is a stacker, 10 is an auxiliary inkjet head, 19, 30 is a mounting table, 20 is a wrapping tape, 21 is a supply roll, 22 is a polishing roll, 23 is a take-up roll, 24 is a pressure adjusting device, 31 is a pressure adjusting device, 32 is a pressure roll, and 40 is a heater.

Claims (1)

In a recording apparatus equipped with an inkjet head that ejects ink onto a recording medium,
A recording apparatus for printing variable information by ejecting ink having a property of being cured by irradiating ultraviolet rays, an electron beam, or the like outside a printing area of fixed information on the recording medium with the inkjet head. .

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