JP2008023824A - Printing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To rationally constitute a printing apparatus which can raise the humidity of a printing environment to an adequate value even in the case of carrying out printing in the environment of a low humidity. <P>SOLUTION: A heating part G is equipped which heats the water by heat from a heat acting part F to which the heat generated along with printing processing is transmitted. A conduit 53 is formed which sends the water from a water tank 51 to the heating part G by a water supply pump 54. An evaporation part E is equipped which evaporates the heating water sent through the conduit 53 and supplies to the inside of a case 10. A humidity controlling means HC which carries out humidity conditioning on the basis of the measured result of a humidity sensor Sh, is equipped. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a printing apparatus in which a housing includes a medium supply mechanism that supplies a print medium to a print unit and a print head that prints an image on the print medium supplied to the print unit. The present invention relates to a technique for improving print quality by controlling humidity.

  As a printing apparatus configured as described above, there is one described in Patent Document 1. In Patent Document 1, in a transfer-type printing apparatus using a photosensitive drum (in the literature, a copying machine), a device required for image formation such as a photosensitive drum, a charging charger, and a cleaning unit, a registration roller, and a paper feeding device Etc., a humidity control unit is provided on the back of the main body. An air outlet and an air inlet are formed in the main body, and both ends of the humidity control unit are connected to the air outlet and the air inlet, and a fan is provided at the connecting portion.

  An air flow path is formed in the upper space of the central part of this humidity control unit, a water storage tank for storing purified water is formed in the lower part, a heater for dehumidification is provided in the air flow path, and a humidifying tank is provided at the bottom of the water storage tank A heater is provided, and a humidity sensor is provided inside the humidity control unit.

  The humidity detected by the humidity sensor is compared with a predetermined optimum humidity in the machine. If the difference from the optimum humidity in the machine is large, the fan speed is increased. The control mode is set so that the humidification heater is turned on when humidifying is performed. By performing this control, the influence from the external environment where the apparatus is installed is minimized, and the occurrence of a partial abnormal image is prevented and good image formation is maintained.

JP-A-9-81018

  Considering the print media used in inkjet printers as the subject of humidity control to improve print quality, there are two types of paper as the print media: swelling type and porous type. In order to obtain a gloss similar to that of printing using photosensitive paper, a porous type paper is often used. Although this paper forms a layer of resin etc. on the surface to create a glossy surface, it has a structure in which many fine holes are formed to absorb the ink sprayed from the print head from the surface, so the surface is Somewhat hard.

  As described above, a paper having a hard surface may cause fine cracks on the surface in a low humidity environment. Such a phenomenon that causes cracking often occurs when the paper surface is bent in a direction in which tension is applied. Therefore, when this type of paper is wound in a roll shape with the surface on which the ink is sprayed facing outward, when the paper is bent in a direction in which the bending direction of the roll is further bent, the surface tends to crack. It will be a thing. When cracks are generated on the surface in this way, not only the gloss of the surface is impaired, but also the absorption of the sprayed ink becomes non-uniform so that blurring occurs and the image quality is deteriorated.

  Further, in a low humidity environment, static electricity may be generated at the roller portion for transporting the print medium, which may impair proper transport of the print medium.

  As described above, when printing is performed in a low humidity environment, it is desired to increase not only the print medium but also the humidity inside the casing of the printing apparatus to an appropriate level. It is also possible to use a commercially available humidifier to increase the humidity of the printing environment in the printing device, but it is improved in that it requires power, such as requiring power to evaporate water. There is room for.

  An object of the present invention is to rationally configure a printing apparatus capable of increasing the humidity of a printing environment to an appropriate value even when printing is performed in a low humidity environment.

A feature of the present invention is a printing apparatus in which a housing includes a medium supply mechanism that supplies a print medium to a print unit, and a print head that prints an image on the print medium supplied to the print unit.
A heating system that receives heat from a heat acting part to which heat generated in a process related to printing is transmitted, evaporates water, and supplies humidified air to the inside of the casing; And a humidity control means for controlling the humidification system based on the measurement result of the humidity sensor.

  With this configuration, heat generated by processing related to printing is transmitted to the heat acting part, thereby evaporating water in the heat acting part and supplying humidified air generated by the evaporation to the inside of the housing. The Moreover, the humidity inside the housing is measured by the humidity sensor, and the humidity control means controls the humidification system based on the measurement result of the humidity sensor, thereby increasing the humidity inside the housing to an appropriate value. Is possible. As a result, by using the heat generated in the printing process rationally, even if a heat source for humidification is not provided, when printing in a low humidity environment, the humidity of the printing environment is appropriate. Thus, a printing apparatus capable of performing printing with good image quality by increasing to a high value has been constructed.

  In the present invention, the humidification system generates the humidified air from a water tank, a heating unit that applies heat of the heat acting unit to water sent from the water tank, and heated water sent from the heating unit. The transpiration unit may be provided, and the transpiration unit may be disposed inside the housing.

  With this configuration, the water supplied from the water tank causes the heat of the heating section to act on the water to generate heating water, and the transpiration section generates humid air from the heating water. Since it is arrange | positioned inside a housing | casing, the humidification air generated in this transpiration | evaporation part can be supplied to the inside of a housing | casing as it is and humidification can be performed.

  In the present invention, the humidification system generates the humidified air from a water tank, a heating unit that applies heat of the heat acting unit to water sent from the water tank, and heated water sent from the heating unit. A transpiration unit to be provided, the transpiration unit being arranged outside the housing, and a supply path for supplying humidified air generated by the transpiration unit to the inside of the housing. .

  With this configuration, the water supplied from the water tank causes the heat of the heating section to act on the water to generate heating water, and the transpiration section generates humid air from the heating water. Although arranged outside the casing, humidification can be performed by supplying humidified air generated in the transpiration unit into the casing via the supply path.

  In the present invention, the humidification system generates heat in the water tank by applying heat from the heat acting unit to water stored in the water tank, and the water tank is humidified from the heat water. A water tank configured as a transpiration unit for generating air and functioning as the transpiration unit may be disposed inside the casing.

  With this configuration, by causing the heat from the heat acting part to act on the water stored in the water tank, the heated water is generated in the water tank, and the water is directly evaporated in the water tank, Humidification can be performed by supplying humidified air generated in the water tank directly into the housing.

  In the present invention, the humidification system includes a heat exchange mechanism that takes out heat from the heat acting part by a heat medium, and heat from the heat exchange mechanism to a water tank and water sent from the water tank. A heating unit to be actuated and a transpiration unit that generates the humidified air from heated water sent from the heating unit may be provided, and the transpiration unit may be disposed inside the casing.

  With this configuration, it is not necessary to supply and heat water near the heat acting part by taking out the heat generated in the heat acting part with the heat exchange mechanism, so that the heat acting part and the heating part are separated from each other. The humidified air generated in the transpiration unit can be supplied to the inside of the housing for humidification.

  In the present invention, the print medium may be a long one wound in a roll shape, and the print head may be an ink jet type that prints an image by spraying ink on the print medium.

  With this configuration, even when a long print roll is used as a print medium, or even when printing is performed in a low humidity environment by bringing humidified air into contact with the print medium, the condition of the print medium A good print can be made by spraying ink with the appropriate setting.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
〔overall structure〕
As shown in FIGS. 1 and 2, the magazine housing portion A is disposed at the lower portion of the housing 10, and the ink jet type printing portion B that performs printing by spraying ink is disposed at the upper portion of the housing 10. In addition, an ink storage portion C is disposed on the side of the paper, and a laminate portion D for forming a resin film on the surface of the printed paper P (an example of a print medium) is provided on the upper surface of the housing 10. An ink jet type printing apparatus is configured to include a rack plate 11 that receives the paper P sent out from D.

  In this printing apparatus, as the paper P, a porous ink receiving layer having a large number of fine pores is formed on the surface side of the base on which the resin coat film is formed on the front and back surfaces, so that the surface has a glossy surface. The type is used.

  The magazine housing portion A includes a drawer (not shown) that slides in the front-rear direction integrally with the lower wall body 12, and is configured such that the magazine M can be detachably set to the drawer. The magazine M stores the long paper P as a print medium in a roll shape. The magazine M includes a case 1, a pair of support rollers 2 that support the paper P, and a pressure-feed type feed roller 3 that presses and transports the paper P.

  The print section B is configured to print an image by spraying ink with a print head H onto the paper P supplied from the magazine housing section A. The print section B is transparent on the upper wall body 13 of the print section B. An upper wall 13 formed with a resin plate window W is provided to be freely opened and closed.

  Specifically, the first and second transport rollers 21 and 2 of the pressure-bonding type disposed on the upstream side and the downstream side of the print position so as to transport the paper P sent to the print position by pressure bonding. 22 and a guide plate 23 for guiding the back side of the paper P at the printing position. A large number of through holes (not shown) are formed in the guide plate, and a negative pressure is applied to the paper P at a position below the guide plate 23 through the large number of through holes formed in the guide plate 23. And a suction fan 25 that discharges air inside the negative pressure case 24 to generate negative pressure.

  The print section B includes a carriage 27 that can reciprocate along the main scanning direction (the width direction of the paper P) along the guide rail 26, and the print head H is provided on the lower surface of the carriage 27. Although not shown in the drawing, the first transport roller 21 and the second transport roller 22 are driven synchronously by a transport motor (not shown), and the carriage is driven by a main scanning motor (not shown).

  The ink storage unit C includes a plurality of ink cartridges (not shown) of different hues in a replaceable manner, and a supply system for supplying ink from the plurality of ink cartridges to the print head is formed. Yes.

[Conveying mode]
In this printing apparatus, the paper P from the magazine M is supplied to a printing unit B by a supply unit U1 (an example of a medium supply mechanism). In the printing unit B, the first conveyance roller 21 and the second conveyance roller 22 are used. While performing the conveyance by the print conveyance unit U2, the print head H is operated in the main scanning direction by the scanning unit US to execute the printing process. After this printing, the paper P is cut into a print size by a cutter unit U3 having a fixed blade 31 and a movable blade 32, and thereafter, a pressure-bonding type that performs posture change around the axis and reverse operation. Paper P is supplied to the switchback unit U4 having the reverse roller 33, and after this supply, as shown in FIG. 2, the reverse roller 33 is swung in the direction of the arrow to change the posture, and then the reverse operation is performed. When the paper is sent to the rack plate 11, the print surface is converted to an upward orientation and sent to the discharge unit U <b> 5. The discharge unit U5 transports the paper P upward by a plurality of pressure-conveying type transport rollers 34, and then delivers the paper P to the laminating portion D. In the laminating portion D, a resin film is formed on both surfaces of the paper P, and the rack plate 11 is sent to the upper surface.

  Although not shown in the drawings, this transport processing system includes an electric motor that transports the paper P in the supply unit U1, and drives the first transport roller 21 and the second transport roller 22 in the print transport unit U2. An electric motor is provided, the cutter unit U3 includes an electric motor that drives the movable blade 32, and the switchback unit U4 includes an electric motor that changes the posture of the reversing roller 33 and an electric motor that conveys in both forward and reverse directions. The discharge unit U5 includes an electric motor that works the plurality of transport rollers 34.

  The paper P is controlled by the supply unit U1, the print transport unit U2, the cutter unit U3, the switchback unit U4, and the discharge unit U5, and the print head H is main-scanned by the scanning unit US in the print unit B. A control device 50 having a microprocessor is provided inside the casing 10 so as to control printing of an image on the paper P while reciprocating in the direction, and to control the laminating portion D. In addition, this control apparatus is provided with the humidity control means HC which consists of software so that the humidity inside the housing | casing 10 may be controlled so that it may mention later.

[Laminate part]
As shown in FIG. 2, the laminating portion D includes a transfer sheet Sa sent from the transfer sheet supply portion 42 and an auxiliary sheet Sb sent from the auxiliary sheet supply portion 43. The transfer layer of the transfer sheet Sa is transferred onto the print surface of the paper P by being heated and pressed by the first heating roller 44 (the transfer layer after transfer is referred to as a transfer film). Next, after the transfer sheet Sa is peeled from the paper P and wound around the transfer sheet take-up portion 45, the transfer film transferred onto the surface of the paper P is pressed by being heated with the second heating roller 46. After that, the auxiliary sheet Sb is peeled off from the paper P and wound around the auxiliary sheet take-up portion 47, and the paper P is discharged onto the rack plate 11 by the discharge roller 48.

  Each of the first heating rollers 44 disposed on the front side (upper side) and the rear side (lower side) of the paper P incorporates a heat source such as a halogen lamp inside. Of these, the surface temperature is maintained at about 90 to 110 ° C. for the upper one and about 50 to 70 ° C. for the lower one. In addition, the second heating roller 46 has a built-in heat source such as a halogen lamp only on the surface side (upper side) of the paper P, and the surface temperature is maintained at about 80 to 100 ° C.

  Although not shown in the drawing, the transfer sheet Sa has a structure in which a transfer layer is formed on the surface of a film-like substrate made of a resin material. The transfer layer peels off easily from the substrate, and adheres to the surface of the paper P in a heated and pressurized state. After the coating, the transfer film formed on the surface of the paper P by the coating is the paper. Protect the printed surface of P. Further, the auxiliary sheet Sb receives a transfer layer located outside the paper P when the transfer layer of the transfer sheet Sa is transferred, and is set to have a slightly wider width than the transfer sheet Sa.

[Humidification system]
As shown in FIGS. 2 and 3, a water tank 51 is provided at an upper position of the housing 10, and the water in the water tank 51 is disposed in the vicinity of the first heating roller 44 (an example of the heat acting part F) of the laminating part D. A heat exchange unit 52 (an example of the heating unit G) is provided at a position, and a pipe line 53 is provided to supply water heated by the heat exchange unit 52 to the transpiration unit E disposed at the lower part of the housing 10. The humidification system is configured with the water supply pump 54. In this humidification system, the transpiration unit E operates to create humid air from the heated water supplied through the pipe line 53 and send it out to the inside of the housing 10.

  The basic configuration of this humidification system is shown in FIG. 3, and in the same figure, a configuration in which the water tank 51 and the transpiration unit E are arranged inside the housing 10 is shown. In addition to this embodiment, the heat application unit F and the heat exchange unit 52 (an example of the heating unit G) can be arranged inside the housing 10, and other than the evaporation unit E, A thing may be arranged outside the housing 10.

  The heat exchanging unit 52 bends a thin tube for feeding water in order to increase the temperature of water by receiving radiation heat from the first heating roller 44 or heat from the air heated by the first heating roller 44. Alternatively, the heat receiving surface is enlarged to receive heat efficiently, and the heat exchange unit 52 is disposed in the vicinity of the first heating roller 44. Since the water supply amount per unit time is small, the water supply pump 54 is assumed to operate intermittently, and a pump suitable for intermittent operation such as a bellows type or a tube pump type is used. May be.

  The transpiration unit E includes a humidifying mechanism 55 that generates humidified air by evaporating heated water supplied via the pipe line 53, and a discharge fan 56 that sends out the humidified air generated by the humidifying mechanism 55. ing. The humidifying mechanism 55 sucks heated water up to a mat or the like and vaporizes it by contacting air from a discharge fan or the like, or sends it in a mist form by contacting heated water with an ultrasonic vibrator. Etc. The humidifying mechanism 55 may have a simple structure that includes a tray for storing heated water and evaporates water from the tray.

  Further, a shutter 57 is provided between the heat exchange unit 52 and the first heating roller 44, and the shutter 57 exchanges heat by radiation from the first heating roller 44 by adjusting the amount of withdrawal by the operation of the withdrawal / retraction operation mechanism 58. The amount of heat received by the unit 52 can be adjusted.

  In order to adjust the amount of heat received by the heat exchange unit 52 by radiation from the first heating roller 44, the position of the heat exchange unit 52 may be adjusted with respect to the first heating roller 44.

(Humidification control)
The housing 10 is provided with a humidity sensor Sh. As shown in FIG. 4, the control device 50 performs printing by the print head H, the scanning unit US, the supply unit U1, the print transport unit U2, the cutter unit U3, the switchback unit U4, the discharge unit U5, and the laminate unit D. A control system for realizing processing is provided, and the humidity control means HC controls the water supply pump 54, the discharge fan 56, and the exit / retreat operation mechanism 58 on the basis of the measurement result of the humidity sensor Sh to control the casing 10. Control the humidity inside.

  As shown in the flowchart of FIG. 5, the control device 50 acquires the measurement value of the humidity sensor Sh, and when the measured humidity is less than the target range, opens the shutter 57 and activates the water supply pump 54. The transpiration unit E is activated (steps # 101 to # 103).

  In this control, a target humidity (for example, 50%) is set in advance, and a target area is set in which a humidity range is provided between the low humidity side and the high humidity side with reference to the target humidity. Therefore, when the humidity measured by the humidity sensor Sh is less than the humidity in the target area, that is, when it is determined that the humidity measured by the humidity sensor Sh has not reached the lowest value in the target area, humidification is performed. Therefore, by opening the shutter 57 and operating the water supply pump 54, the amount of heat received by the heat exchange unit 52 is increased to promote the temperature rise of the water. The heated water is sent to the transpiration unit E through the pipe line 53 and evaporated in the transpiration unit E. As a result, the humidified air is sent out to the inside of the housing 10.

  If the humidity measured by the humidity sensor Sh exceeds the target range, the transpiration unit E is stopped and the water supply pump 54 is stopped (Steps # 104 and # 105).

  That is, when it is determined that the humidity measured by the humidity sensor Sh exceeds the highest value in the target area, it is not necessary to perform humidification, so the transpiration unit E is stopped and the water supply pump 54 is stopped. It is.

  Further, when the humidity measured by the humidity sensor Sh does not exceed the target range, it can be determined that the humidity measured by the humidity sensor Sh is within the target range, so that it corresponds to the deviation based on the target humidity. The position of the shutter 57 is adjusted, and the amount of water supplied by the water supply pump 54 is adjusted corresponding to the deviation (step # 106).

  That is, in this step, although the operation of the transpiration unit E continues, it is necessary to finely adjust the humidity, so that the deviation of the humidity measured by the humidity sensor Sh based on the target humidity is on the high humidity side. In some cases, the shutter 57 is operated in the closing direction by an amount corresponding to this deviation, and the amount of water supplied by the water supply pump 54 is reduced corresponding to this deviation to suppress the generation of humid air. Conversely, when the deviation is on the low humidity side, the shutter 57 is operated by an amount corresponding to this deviation, and the amount of water supplied by the water supply pump 54 is increased in response to this deviation, so that the humidified air It promotes the generation of

  By continuing such control until it is reset, the humidity inside the housing 10 can be maintained at a value close to the target value (step # 107).

  As described above, according to the present invention, the heat generated in the laminating part D is taken in and the water is heated, and the humidifying system for evaporating the water inside the housing 10 is provided. By rationally using this waste heat without wasting heat, the energy used in creating humidified air is reduced and energy saving is achieved, while the humidity inside the housing 10 is increased, Good humidity is achieved by maintaining the humidity of P at an appropriate value.

[Another embodiment]
The present invention may be configured as follows in addition to the above-described embodiment (in this another embodiment, components having the same functions as those in the above-described embodiment are given the same numbers and symbols as those in the above-described embodiment. is doing).

(A) As shown in FIG. 6, as a humidifying unit, water sent to the pipe line 53 by heat from a water tank 51 for storing water and a heat acting part F such as the first heating roller 44 in the laminating part D A heating unit G such as a heat exchange unit 52 for heating and a transpiration unit E for evaporating water from the pipe line 53 and an electromagnetic valve 61 for controlling the amount of water delivered from the water tank 51 are provided. In this humidification unit, the water tank 51 is arranged at a higher level than the heat exchange unit 52 so that water is sent out by its own weight, and the heated water supplied to the transpiration unit E by the control of the electromagnetic valve 61. Control the amount.

  A signal system for inputting the humidity value measured by the humidity sensor Sh provided in the housing 10 to the control device 50 is formed, and the discharge fan 56, the retracting operation mechanism 58, and the electromagnetic valve 61. The control system which controls is formed. Further, when water is supplied from the water tank 51, the electromagnetic valve 61 is intermittently driven, and the amount of water supplied is adjusted by adjusting the time that the electromagnetic valve 61 is held in the open position during the driving. With such a configuration, when reducing the supply amount of humidified air during humidification control, the open time during driving of the solenoid valve 61 is shortened, and conversely, when increasing the supply amount of humidified air, Control to increase the opening time when the valve 61 is driven is performed, and the supply amount of the humidified air can be reliably adjusted to appropriately humidify the inside of the housing 10.

(B) As shown in FIG. 7, as a humidification system, water sent to the pipe line 53 by heat from the water tank 51 for storing water and the heat acting part F such as the first heating roller 44 in the laminating part D is supplied. A heating unit G such as a heat exchange unit 52 for heating and a transpiration unit E for evaporating water from the pipe line 53 are arranged outside the casing 10 of the printing apparatus, and the humid air generated by the transpiration unit E is A supply path 62 for supplying the inside of the housing 10 is formed, and a fan 63 for sending humid air to the supply path 62 is provided.

  A signal system for inputting the humidity value measured by the humidity sensor Sh provided in the housing 10 is formed for the control device 50, and a control system for controlling the water supply pump 54 and the fan 63 is formed. is doing. From such a configuration, for example, even if the thermal action part F such as the laminate part D is arranged at a position separated from the housing 10, the transpiration part E is arranged at a position near the thermal action part F. Thus, control is performed to generate humidified air in a state where the heat efficiency of the heated water is suppressed and the heat efficiency is good.

(C) As shown in FIG. 8, as a humidifying unit, a thermal action of heating water stored in the water tank 51 with heat from the water tank 51 storing water and the first heating roller 44 in the laminating portion D, etc. A part F, a moving mechanism 65 that operates the water tank 51 in the perspective direction with respect to the heat acting part F, and a fan 66 that sends out humidified air generated in the water tank 51 are arranged inside the housing 10. The moving mechanism 65 includes an electric motor 65c that winds an endless belt 65b around a pair of pulleys 65a and drives one pulley 65a in both forward and reverse directions, and the water tank 51 and the heat acting part are driven by the electric motor 65c. The distance from F can be set arbitrarily.

  A signal system for inputting the humidity value measured by the humidity sensor Sh to the control device 50 is formed, and a control system for controlling the electric motor 65c and the fan 66 is formed. With such a configuration, at the time of humidification control, heat can be applied to the water stored in the water tank 51 from the heat acting part F, and humidified air can be generated by the steam generated in the water tank 51. At the same time, by performing control to set the distance between the heat acting part F and the water tank 51 based on the humidity value measured by the humidity sensor Sh, the necessary humidified air is supplied into the housing 10. Can be humidified.

(D) As shown in FIG. 9, in this humidifying unit, an actuator that generates heat during operation, such as an electric motor provided in the inside of the housing 10, is used as a heat acting part F, or heat generation during operation, such as a control board. The control unit that performs this operation is a heat application unit F, and is provided with a heat exchange mechanism 67 that extracts waste heat from the heat application unit F via a heat medium. That is, as the humidifying unit, a water tank 51 for storing water, a water supply pump 54 for sending water from the water tank 51 to the pipe line 53, a heat exchange mechanism 67 for taking out heat from the heat acting part F, and the heat exchange A heating unit G such as a heat exchange unit 52 that heats the water sent to the pipe line 53 with heat from the mechanism 67 and a transpiration unit E that evaporates the water from the pipe line 53 are provided.

  The heat exchange mechanism 67 includes a circulation pump 67b in a path 67a through which the heat medium circulates. A signal system for inputting the humidity value measured by the humidity sensor Sh to the control device 50 is formed, and a control system for controlling the water supply pump 54, the exhaust fan 56, and the circulation pump 67b is formed. . From such a configuration, when performing humidification control, the heat medium is circulated in the heat exchange mechanism 67 to heat the water by the heat from the heat acting part F in the heating part G, and thus heated. Water is sent to the evaporating part E, and humidified air is generated in the evaporating part E to humidify the inside of the housing 10. In other words, even when the heat acting part F and the heating part G are separated from each other, the water is heated by transferring heat to the position of the heating part G by the heat exchange mechanism 67 to generate humidified air. Is realized.

Perspective view showing the entire printing device Diagram showing paper transport system and humidification system Diagram showing humidification system Block diagram of control system Humidification control flowchart The figure which shows typically the humidification system of another embodiment (a). The figure which shows typically the humidification system of another embodiment (b). The figure which shows typically the humidification system of another embodiment (c). The figure which shows typically the humidification system of another embodiment (d).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Case 51 Water tank 62 Supply path 67 Heat exchange mechanism B Print part E Transpiration part G Heating part H Print head HC Humidity control means P Print medium (paper)
Sh Humidity sensor U1 Medium supply mechanism (supply unit)

Claims (6)

A printing apparatus that houses a medium supply mechanism that supplies a print medium to a print unit and a print head that prints an image on the print medium supplied to the print unit.
A heating system that receives heat from a heat acting part to which heat generated in a process related to printing is transmitted, evaporates water, and supplies humidified air to the inside of the casing; A printing apparatus comprising a humidity sensor that measures the humidity of the water and a humidity control unit that controls the humidification system based on a measurement result of the humidity sensor.   The humidification system includes a water tank, a heating unit that causes heat of the heat acting unit to act on water sent from the water tank, and a transpiration unit that generates the humidified air from the heated water sent from the heating unit. The printing apparatus according to claim 1, wherein the transpiration unit is disposed inside the housing.   The humidification system includes a water tank, a heating unit that causes heat of the heat acting unit to act on water sent from the water tank, and a transpiration unit that generates the humidified air from the heated water sent from the heating unit. The printing apparatus according to claim 1, further comprising: a supply path that supplies the humidified air generated by the transpiration unit to the inside of the casing.   The humidification system generates heat in the water tank by applying heat from the heat acting unit to the water stored in the water tank, and the water tank generates humid air from the heat water. The printing apparatus according to claim 1, wherein a water tank configured as a transpiration unit and functioning as the transpiration unit is disposed inside the casing.   The humidification system includes a heat exchange mechanism that extracts heat from the heat acting part by a heat medium, and a water tank and a heating part that causes heat from the heat exchange mechanism to act on water sent from the water tank. The printing apparatus according to claim 1, further comprising: a transpiration unit that generates the humidified air from heated water sent from the heating unit, wherein the transpiration unit is disposed inside the casing.   6. A long one wound in a roll shape is used as the print medium, and an ink jet type that prints an image by spraying ink on the print medium is used as the print head. The printing apparatus according to any one of the above.

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