JP6849015B2 - Drying equipment, printing equipment - Google Patents

Description

The present invention relates to a drying device and a printing device.

As a printing device that applies a liquid to a continuous paper or the like to perform printing, there is a printing device that applies the liquid to the continuous paper or the like and then dries it using a heating means.

For example, a recording unit that injects liquid onto a recording medium conveyed in the transport direction to perform recording processing, and a recording unit that is arranged on the recording surface side of the recording medium and has been recorded by the recording unit. A first infrared heating unit that irradiates infrared rays having a maximum wavelength within the absorption wavelength band of water contained in the water is arranged on the recording surface side of a recording medium on the downstream side in the transport direction from the first infrared heating unit. It is known that the recording medium heated by the infrared heating unit is provided with a second infrared heating unit that irradiates a recording medium heated by the infrared heating unit with infrared rays having a maximum wavelength within the absorption wavelength band of the solvent contained in the liquid (Patent Document 1). ).

Japanese Patent No. 5772382

By the way, the solvent contained in the liquid has a boiling point higher than that of water and requires a larger energy than that of evaporating water. In this case, if the transport speed of the member to be dried is slowed down, the amount of heat given per unit time increases, but there arises a problem that the drying speed slows down.

The present invention has been made in view of the above problems, and an object of the present invention is to improve drying efficiency.

In order to solve the above problems, the drying apparatus according to the present invention is
A drying device that dries a member to which a liquid is applied and transported.
An infrared heater that irradiates the conveyed member with infrared rays to heat it,
A heating drum that comes into contact with the conveyed member and heats the conveyed member is provided.
In the transport path, the heating drum is arranged on the downstream side of the infrared heater.
The infrared heater toward the path member to be the transport is moved downward from above in the drying device, irradiating infrared rays to the surface opposite to the heating drum and the contact surfaces of the members to be the transport It was configured so that it would be arranged so as to.

According to the present invention, the drying efficiency can be improved.

It is a schematic explanatory drawing of the printing apparatus which concerns on 1st Embodiment of this invention. It is an enlarged explanatory view of the drying apparatus in the 1st Embodiment. Similarly, it is explanatory drawing which provides for the explanation of the winding angle around a 1st heating roller and a heating drum. It is an enlarged explanatory view of the drying apparatus which concerns on 2nd Embodiment of this invention. It is an enlarged explanatory view of the drying apparatus which concerns on 3rd Embodiment of this invention. Similarly, it is explanatory drawing which provides the explanation of the contact state to the 1st heating roller. It is an enlarged explanatory view of the drying apparatus which concerns on 4th Embodiment of this invention. It is an enlarged explanatory view of the drying apparatus which concerns on 5th Embodiment of this invention. It is explanatory drawing which provides the explanation of the arrangement of the temperature sensor. It is a block explanatory drawing of the part related to the temperature control of an infrared heating means.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. First, the printing apparatus according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic explanatory view of the device.

This printing device is an inkjet recording device, and is a liquid applying unit 101 including a liquid ejection head, which is a liquid applying means for ejecting and applying ink, which is a liquid of a required color, to continuous paper 110, which is a member to be conveyed. have.

In the liquid application unit 101, for example, full-line heads 111A, 111B, 111C, 111D for four colors are arranged from the upstream side in the transport direction of the continuous paper 110. Each head 111 applies a liquid of black K, cyan C, magenta M, and yellow Y to the continuous paper 110. The types and numbers of colors are not limited to this.

The continuous paper 110 is fed out from the original winding roller 102, sent out by the transport roller 112 of the transport unit 103 onto the transport guide member 113 arranged to face the liquid applying portion 101, and guided by the transport guide member 113. Is transported (moved).

The continuous paper 110 to which the liquid is applied by the liquid applying unit 101 is sent by the discharge roller 114 via the drying device 104 as the drying device according to the present invention, and is wound up by the take-up roller 105.

Next, the drying apparatus according to the first embodiment will be described with reference to FIGS. 2 and 3. FIG. 2 is an enlarged explanatory view of the drying apparatus, and FIG. 3 is an explanatory view provided for explaining the winding angle around the first heating roller and the heating drum.

The drying device 104 includes a contact heating means 10 that heats the continuous paper 110 by contacting the surface of the continuous paper 110 opposite to the surface to which the liquid is applied. Further, the guide rollers 17A and 17B for guiding the continuous paper 110 to the contact heating means 10 and the guide rollers 17C to 17H for guiding the continuous paper 110 that has passed through the contact heating means 10 are provided.

The contact heating means 10 makes contact with a plurality of first heating rollers 11A to 11E, which are first heating members having a curved contact surface 11a in contact with the continuous paper 110, and also in contact with the continuous paper 110. It includes a heating drum 12 which is a second heating member having a surface 12a. The diameters of the first heating rollers 11A to 11E may be different. The first heating rollers 11A to 11E and the heating drum 12 are all roller-shaped members.

The plurality of first heating rollers 11A to 11E (hereinafter, when not distinguished, they are referred to as "first heating rollers 11"; the same applies to other members) and the heating drum 12 are provided along the conveying direction of the continuous paper 110. They are arranged in an arc shape (or arc shape).

The transport path (transport path) 20 of the continuous paper 110 composed of the plurality of first heating rollers 11, the heating drum 12, and the plurality of guide rollers 17 is on the upstream side of the heating drum 12 which is the second heating member. The continuous paper 110 includes a first transport path portion 21 in contact with the first heating roller 11.

Then, as shown in FIG. 3, the contact distance L2 between the contact surface 12a of the heating drum 12 and the continuous paper 110 is the contact distance L1 between the contact surfaces 11a of the first heating rollers 11A to 11E and the continuous paper 110. The transport path 20 is configured to be longer than the above.

Here, the winding angle θ2 of the continuous paper 110 with respect to the contact surface 12a of the heating drum 12 is larger than the winding angle θ1 of the continuous paper 110 with respect to the contact surface 11a of the first heating roller 11 (θ2> θ1). ..

The winding angles θ2 and θ1 (collectively referred to as “wrapping angles θ”) end contact with the point Ps at which the continuous paper 110 starts contacting the contact surfaces 12a and 11a, as shown in FIG. It is the meaning of the angle formed by the point Pe to be formed with respect to the center O.

Therefore, when the winding angle θ becomes large, the contact distance becomes long if the diameter of the rotating body is the same, and the contact distance becomes long as the diameter of the rotating body becomes large even if the winding angle θ is the same.

In the present embodiment, the diameter of the heating drum 12 is larger than that of the first heating roller 11, and the winding angle θ2 is larger than θ1, so in any case, the contact surface 12a of the heating drum 12 and the continuous paper The contact distance L2 with the 110 is longer than the contact distance L1 between the contact surface 11a of the first heating roller 11 and the continuous paper 110.

As described above, even if the winding angle θ is the same, the larger the diameter of the rotating body, the longer the contact distance. Therefore, even if the heating drum 12 and the first heating roller 11 have the same diameter and the winding angle θ2 is made larger than θ1, the contact distance L2 between the contact surface 12a of the heating drum 12 and the continuous paper 110 becomes the first heating. The contact distance between the contact surface 11a of the roller 11 and the continuous paper 110 is longer than the contact distance L1.

In this way, the contact distance L2 between the contact surface 12a of the heating drum 12 and the continuous paper 110 is longer than the contact distance L1 between each contact surface 11a of the first heating roller 11 and the continuous paper 110. By configuring the path 20, cockling can be reduced and drying efficiency can be improved.

That is, since the strength of the continuous paper 110 is reduced when the time has not passed since the liquid was applied, the circumference of the rotating body is covered over a wide range (long contact distance) on the back surface side of the continuous paper 110. It is difficult to make close contact with the surface (contact surface).

Therefore, in the initial state in which the applied liquid has not been dried, the winding angle θ of the continuous paper 110 around the first heating roller 11 is reduced to shorten the contact distance.

Here, by increasing the curvature of the first heating roller 11, the tension generated during the transportation of the continuous paper 110 changes to the pressing force at the contact portion with the first heating roller 11, so that the tension is changed to the first heating roller 11. The contact state becomes uniform. In this state, the continuous paper 110 is free from cockling and wrinkles, and when it passes through the first heating roller 11, the liquid on the continuous paper 110 can be uniformly supplied with the heat required for drying. ..

As a result, the continuous paper 110, in which the cock ring is suppressed and the drying is progressing, can be brought into close contact with the contact surface even if the contact distance with the rotating body is lengthened. In particular, by setting the diameter of the first heating roller 11 to 100 mm or less, cockling can be reliably suppressed.

Therefore, in the heating drum 12 arranged on the downstream side of the first heating roller 11, heat can be supplied to the continuous paper 110 in a short time by increasing the contact distance of the continuous paper 110, and the continuous paper 110 can be dried. The efficiency is improved and drying can be performed in a short time.

By increasing the number of first heating rollers 11 to be brought into contact with each other to increase the amount of heat for drying, it is possible to increase the drying rate and ensure high productivity even for a thick continuous body.

Further, in the present embodiment, an infrared heater (IR) that irradiates infrared rays having a maximum wavelength (peak wavelength) within the absorption wavelength band of the solvent contained in the liquid on the downstream side of the heating drum 12 which is the second heating member. : Far-infrared heater), the first infrared heating means 32A to 32C are arranged. As the infrared heater, a carbon heater that uses carbon as the material of the heating element, a medium wavelength infrared heater that radiates medium wavelength infrared rays, or the like can be used.

Here, the peak wavelength of infrared rays emitted by the first infrared heating means 32 is within the band of 3 to 8 μm.

In this way, by arranging the first infrared heating means 32 that irradiates infrared rays that evaporate the solvent contained in the liquid on the downstream side of the heating drum 12, a sufficient amount of heat is given to the continuous book paper 110 by the heating drum 12. Then it can be irradiated with infrared rays.

As a result, when evaporating a solvent that has a boiling point higher than that of water and requires more energy than evaporating water, the temperature of the continuous paper is likely to rise when irradiating infrared rays, and the solvent can be efficiently evaporated. It can be evaporated and the drying efficiency is improved. By improving the drying efficiency, it becomes possible to increase the transport speed of the continuous paper and increase the productivity.

Next, the drying apparatus according to the second embodiment of the present invention will be described with reference to FIG. FIG. 4 is an enlarged explanatory view of the drying device.

In the present embodiment, in the first transport path portion 21, an infrared heater (IR: far infrared heater) that irradiates the first heating roller 11 with infrared rays having a maximum wavelength within the absorption wavelength band of water contained in the liquid. A plurality of second infrared heating means 31A to 31E composed of the above are arranged.

Here, the peak wavelength of infrared rays irradiated by the second infrared ray heating means 31 is within the range of 2 to 6 μm. Water has absorption peak wavelengths at 2 μm, 3 μm, and 6 μm when the amount of water is small, and the drying efficiency is improved by irradiating infrared rays having a peak wavelength that matches the absorption peak wavelength.

Therefore, the peak wavelength of the infrared rays irradiated by the plurality of second infrared rays heating means 31 can be set to become longer in order or stepwise toward the downstream side.

Further, the second infrared heating means 31 is arranged so as to irradiate infrared rays toward the first heating roller 11 side. By irradiating infrared rays toward the portion where the continuous paper 110 winds around the first heating roller 11, the heat sink effect of the first heating roller 11 can prevent a sudden temperature rise of the continuous paper 110. Damage to the paper 110 can be reduced.

In this way, in addition to heating by the first heating roller 11, heating by infrared irradiation by the second infrared heating means 31 is used in combination to evaporate the water content of the liquid applied to the continuous paper 110 in a shorter time. It is possible to improve the drying speed. Therefore, it is possible to further increase the transport speed of the continuous paper and increase the productivity as compared with the first embodiment.

Next, the drying apparatus according to the third embodiment of the present invention will be described with reference to FIGS. 5 and 6. FIG. 5 is an enlarged explanatory view of the drying apparatus, and FIG. 6 is an explanatory view for explaining a state of contact with the first heating roller.

The drying device 104 includes a contact heating means 10 that heats the continuous paper 110 by contacting the surface of the continuous paper 110 opposite to the surface to which the liquid is applied. Further, the guide rollers 17A for guiding the continuous paper 110 to the contact heating means 10 and the guide rollers 17B to 17E for guiding the continuous paper 110 that has passed through the contact heating means 10 are provided.

Similar to each of the above-described embodiments, the contact heating means 10 includes a plurality of first heating members, the first heating rollers 11A to 11F, and a second heating member, the heating drum 12. Further, the contact heating means 10 includes contact guide rollers 13A to 13E, which are contact guide members for guiding the continuous paper 110 so as to come into contact with the first heating rollers 11E to 11A, and the heating drum on the downstream side of the heating drum 12. A guide roller 17F that guides the contact guide roller 13A from 12 is provided.

Here, the first heating rollers 11A to 11F are arranged side by side in a curved shape. Further, the contact guide roller 13 is arranged between the adjacent first heating rollers 11.

In the transport path (transport path) 20 of the continuous paper 110 composed of the plurality of first heating rollers 11, the heating drum 12, and the plurality of guide rollers 17, the continuous paper 110 is located upstream of the heating drum 12. The first transport path portion 21 in contact with the first heating roller 11 and the second transport path portion 22 in which the continuous paper 110 contacts the first heating roller 11 on the downstream side of the heating drum 12 which is the second heating member. Includes.

That is, as shown in FIG. 6, the transport path 20 is provided by the heating drum 12 or the like after the continuous paper 110 is transported in the first direction (Y1 direction) while contacting the plurality of first heating rollers 11. The transport direction is changed to include a path in which the transport is carried out in the second direction (Y2 direction) opposite to the first direction while being in contact with the plurality of first heating rollers 11 again.

In the present embodiment, two or more paths that come into contact with the first heating rollers 11 when the continuous paper 110 is conveyed in the Y2 direction are configured, but the paths are those that come into contact with one first heating roller 11. You may.

Here, the continuous paper 110 conveys the outside (the side receiving tension) of the plurality of first heating rollers 11A to 11F arranged in a curved shape in the Y1 direction while contacting the heating rollers 11A to 11F. Then, the direction is changed, and the inside of the plurality of first heating rollers 11E to 11A (the side where loosening occurs) is guided by the contact guide roller 13 and conveyed in the Y2 direction while contacting the first heating rollers 11E to 11A. ..

At this time, as shown in FIG. 6, the continuous paper 110 is conveyed in the Y1 direction and the Y2 direction while simultaneously contacting two separated portions (parts a and b) of the same first heating roller 11. Become.

In this way, by bringing the members to be simultaneously transported to two different locations of the same heating member (heating roller) in contact with each other to heat the members, the members to be efficiently transported can be dried with a small number of heating members.

Then, in the present embodiment, in the first transport path portion 21, the second infrared heating means for irradiating the first heating rollers 11B to 11E with infrared rays having a maximum wavelength within the absorption wavelength band of water contained in the liquid. 31A to 31D are arranged.

Further, in the second transport path portion 22, the first infrared heating means 32A to 32D that irradiate infrared rays having a maximum wavelength within the absorption wavelength band of the solvent contained in the liquid are arranged toward the first heating rollers 11E to 11B. Has been done.

That is, at the same time, the second infrared heating means 31 and the first infrared heating means 32 that irradiate infrared rays having different peak wavelengths at two separated positions (parts a and b) of the same first heating roller 11 are arranged.

As a result, as described in each of the above-described embodiments, in addition to heating by the first heating roller 11, heating by infrared irradiation by the second infrared heating means 31 is used in combination, so that the liquid imparted to the continuous paper 110 is applied. Moisture can be evaporated in a shorter time.

Then, on the downstream side of the heating drum 12, a first infrared heating means 32 that irradiates infrared rays that evaporate the solvent contained in the liquid is arranged, and after giving a sufficient amount of heat to the continuous paper 110 by the heating drum 12, infrared rays are applied. By irradiating the continuous sheet paper, the temperature of the continuous paper can be easily increased, the solvent can be efficiently evaporated, and the drying efficiency is improved.

By improving the drying efficiency in this way, it is possible to increase the transport speed of the continuous paper and increase the productivity.

Next, the drying apparatus according to the fourth embodiment of the present invention will be described with reference to FIG. 7. FIG. 7 is an enlarged explanatory view of the drying device.

In the present embodiment, in the third embodiment, the second infrared heating means 31E to irradiate the upstream side of the first heating roller 11 with infrared rays having a maximum wavelength within the absorption wavelength band of water contained in the liquid. 32G is arranged.

As a result, the temperature of the continuous paper 110 can be raised on the upstream side of the first heating roller 11 to improve the wrinkle smoothing effect of the first heating roller 11.

Next, the drying apparatus according to the fifth embodiment of the present invention will be described with reference to FIG. FIG. 8 is an enlarged explanatory view of the drying device.

In the present embodiment, in the third embodiment, the first heating roller 11F is opposed to the heating drum 12, and infrared rays having a maximum wavelength within the absorption wavelength band of water contained in the liquid are irradiated to the heating drum 12. 2 Infrared heating means 31H to 31J are arranged.

As a result, the temperature of the continuous paper 110 can be raised further and the solvent can be rapidly evaporated at a stage prior to the second transport path portion 22 as compared with the third embodiment.

Next, the temperature control of the infrared heating means will be described with reference to FIGS. 9 and 10. FIG. 9 is an explanatory diagram for explaining the arrangement of the temperature sensor, and FIG. 10 is a block explanatory view of a portion related to temperature control of the infrared heating means.

A temperature sensor 41 that detects the temperature of the continuous paper 110 is arranged on the downstream side of the second infrared heating means 31.

Then, the detection signal of each temperature sensor 41 corresponding to each second infrared heating means 31 is input to the control unit 50. The control unit 50 controls the wavelength of infrared rays emitted from each second infrared ray heating means 31 according to the detection temperature obtained from the detection signal of the temperature sensor 41.

Similarly, a temperature sensor 42 that detects the temperature of the continuous paper 110 is arranged on the downstream side of the first infrared heating means 32.

Then, the detection signal of each temperature sensor 42 corresponding to each first infrared heating means 32 is input to the control unit 50. The control unit 50 controls the wavelength of infrared rays emitted from each of the first infrared heating means 32 according to the detection temperature obtained from the detection signal of the temperature sensor 42.

In the second infrared heating means 31 and the first infrared heating means 32, the temperature of the heat source is lowered by lowering the input voltage (applied voltage), and the peak length of the wavelength of the irradiated infrared rays becomes longer.

Here, water evaporates faster when the temperature is raised to the boiling point and dried, and the temperature of water does not exceed 100 ° C.

Therefore, when the detection temperature of the continuous paper 110 detected by the temperature sensor 41 on the downstream side of the second infrared heating means 31 is 100 ° C. (boiling point of water) or less, the control unit 50 has a peak wavelength (short) of 2 μm. The applied power is adjusted so as to irradiate the infrared rays of. On the other hand, when the detection temperature is 100 ° C. or higher, the applied power is controlled to be lowered so as to irradiate infrared rays having a peak wavelength (long) of 3 μm or 6 μm.

Further, in order to evaporate the solvent, it is necessary to set the temperature higher than the boiling point of water (100 ° C.) (the boiling point of the solvent contained in the ink is 100 ° C. or higher). In addition, if the temperature of the paper is 150 ° C or higher, damage such as blisters and yellowing will occur.

Therefore, the control unit 50 applies the continuous infrared heating means 32 to the first infrared heating means 32 so that the detection temperature of the continuous paper 110 detected by the temperature sensor 42 on the downstream side of the first infrared heating means 32 is between 100 ° C. and 150 ° C. Control the voltage.

Further, in each of the above embodiments, a simple roller (rotating body) other than the heating member may be arranged in the middle, which is described in the configuration in which a plurality of first heating members are continuously arranged.

In each of the above embodiments, the example in which the member to be conveyed is a continuous paper is described, but the present invention is not limited to this, and the member is not particularly limited as long as it is a member conveyed by the drying apparatus according to the present invention. For example, in addition to continuous paper, roll paper, a continuous body such as a web, and a recording medium (printed matter) such as a long sheet material, a printed matter such as a wallpaper, a sheet for an electronic circuit board such as a prepreg may be used.

In addition to recording images such as characters and figures with a liquid such as ink, the members transported by the printing device are ink-inked with meaningless images such as patterns for the purpose of decoration and decoration. It may be given with a liquid such as.

In the present application, the liquid applied to the conveyed member is not particularly limited, but it is preferable that the liquid has a viscosity of 30 mPa · s or less at room temperature, under normal pressure, or by heating or cooling. More specifically, solvents such as water and organic solvents, colorants such as dyes and pigments, polymerizable compounds, resins, functionalizing materials such as surfactants, biocompatible materials such as DNA, amino acids and proteins, and calcium. , Solvents, suspensions, emulsions, etc. containing edible materials such as natural pigments, etc., for example, inks for inkjets, surface treatment liquids, constituents of electronic elements and light emitting elements, and formation of electronic circuit resist patterns. It can be used for applications such as a liquid for use and a material liquid for three-dimensional modeling.

When a liquid discharge head is used as a liquid applying means, a piezoelectric actuator (laminated piezoelectric element and thin film piezoelectric element), a thermal actuator using an electric heat conversion element such as a heat generating resistor, and vibration are used as an energy generating source for discharging the liquid. Those using an electrostatic actuator composed of a plate and a counter electrode are included.

Note that printing in the present application has the same meaning as image formation, recording, printing, printing, and the like.

10 Contact heating means 11A to 11J Heating roller (first heating member)
12 Heating drum (second heating member)
13A to 13J Contact Guide Roller 17A to 17F Guide Roller 31A to 31G Second Infrared Heating Means 32A to 32D First Infrared Heating Means 101 Liquid Applying Unit 103 Transporting Unit 104 Drying Device 110 Continuous Paper (Conveyed Member)

Claims (12)

A drying device that dries a member to which a liquid is applied and transported.
An infrared heater that irradiates the conveyed member with infrared rays to heat it,
A heating drum that comes into contact with the conveyed member and heats the conveyed member is provided.
In the transport path, the heating drum is arranged on the downstream side of the infrared heater.
The infrared heater toward the path member to be the transport is moved downward from above in the drying device, irradiating infrared rays to the surface opposite to the heating drum and the contact surfaces of the members to be the transport A drying device characterized in that it is arranged so as to. The path for irradiating infrared rays from the infrared heater is a path in which the conveyed member is directed downward in the drying device from a position higher than the heating drum , according to claim 1. The drying device described. The transport path from the heating drum to the outlet of the drying device includes a first path in which the transported member passes above the heating drum and a first path in which the transported member passes below the heating drum. The drying apparatus according to claim 1 or 2, wherein the drying apparatus includes two routes. The transport path from the inlet of the drying device to the heating drum includes a third path through which the member to be transported passes above the heating drum, and a transport direction from the third path downward in the drying device. It includes a fourth path in which the members to be modified and transported move from above to below in the drying apparatus.
The drying apparatus according to claim 3 , wherein the infrared heater irradiates infrared rays toward the fourth path. The invention according to any one of claims 1 to 4 , wherein the path from the infrared heater to the heating drum is not provided with a member that comes into contact with the surface of the conveyed member to which the liquid is applied. Drying device. The drying apparatus according to any one of claims 1 to 5 , wherein a plurality of the infrared heaters are arranged along a path in which the conveyed member moves from the upper side to the lower side in the drying apparatus. .. A liquid applying means for applying a liquid to a member to be conveyed,
An infrared heater that irradiates and heats the conveyed member to which the liquid is applied, and an infrared heater.
A printing apparatus including a heating drum that contacts and heats the conveyed member to which the liquid is applied.
In the transport path, the heating drum is arranged on the downstream side of the infrared heater.
The infrared heater is on the side opposite to the surface of the conveyed member in contact with the heating drum toward a path in which the conveyed member to which the liquid is applied moves from the upper side to the lower side in the printing apparatus. A printing device characterized in that it is arranged so as to irradiate infrared rays on the surface of the surface. According to claim 7 , the path for irradiating the infrared heater with the infrared heater is a path in which the conveyed member is directed downward in the drying device from a position higher than the heating drum. The printing device described. The printing apparatus according to claim 7 or 8 , wherein the infrared heater and the heating drum are arranged at a position lower than the liquid applying means. The transport path from the liquid applying means to the heating drum includes a first path in which the transported member passes above the heating drum, and a transport direction from the first path is changed downward in the printing apparatus. A second path in which the conveyed member moves from above to below in the printing apparatus is included.
The infrared heater irradiates infrared rays toward the second path.
The drying apparatus according to claim 8 or 9. A drying device that dries a member to which a liquid is applied and transported.
An infrared heater that irradiates the conveyed member with infrared rays to heat it,
A heating drum that comes into contact with the conveyed member and heats the conveyed member is provided.
In the transport path, the heating drum is arranged on the downstream side of the infrared heater.
The transport path on the upstream side of the heating drum includes a path extending from above to below in the drying device.
The infrared heater is arranged so as to irradiate the surface of the conveyed member on the side opposite to the surface in contact with the heating drum toward the path.
A drying device characterized by that. A liquid applying means for applying a liquid to a member to be conveyed,
An infrared heater that irradiates and heats the conveyed member to which the liquid is applied, and an infrared heater.
A printing apparatus comprising a heating drum that contacts and heats the conveyed member to which the liquid is applied.
In the transport path, the heating drum is arranged on the downstream side of the infrared heater.
The transport path on the upstream side of the heating drum includes a path extending from above to below in the printing apparatus.
The infrared heater is arranged so as to irradiate the surface of the conveyed member on the side opposite to the surface in contact with the heating drum toward the path.
A printing device characterized by that.

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