JP6142715B2 - Recording medium heating apparatus, recording medium pre-processing apparatus, and printing system - Google Patents

Description

  The present invention relates to a recording medium heating apparatus, a recording medium pretreatment apparatus, and a printing system.

  For example, a rotary press having a drying device that transports a recording medium on which an image is printed with ink or the like over a plurality of staggered heating rollers and heats the recording medium to dry is known (for example, Patent Document 1).

  However, in the drying apparatus in Patent Document 1, since it is necessary to hang a recording medium on a plurality of heating rollers arranged in a staggered manner, operations such as loading of the recording medium and maintenance during jamming may be complicated. .

  The present invention has been made in view of the above, and an object of the present invention is to provide a recording medium heating apparatus capable of easily loading and maintaining a recording medium.

  According to one aspect of the present invention, there is provided a recording medium heating apparatus for heating a recording medium to be conveyed, the first heating means for heating the recording medium from one surface side, and the recording medium on the other surface side. A second heating means that heats from a plurality of pulleys, a first tensioning section between the plurality of pulleys, the first heating means being fixed to the second tensioning section, and the second tensioning section facing the first stretching section. A plurality of endless belts, to which the second heating means is fixed, are provided on the frame, and the opening / closing means holds the first heating means and the second heating means so as to be freely opened and closed.

  According to the embodiment of the present invention, it is possible to provide a recording medium heating apparatus capable of easily loading and maintaining a recording medium.

1 is a diagram illustrating a schematic configuration of a printing system according to an embodiment. It is a figure which illustrates schematic structure of the pretreatment liquid application device concerning an embodiment. It is a figure which illustrates the heating unit which concerns on embodiment. It is a figure which illustrates the heating unit in the state where the main body frame was removed. It is a figure which illustrates a mode that a 1st heating frame and a 2nd heating frame are opened. It is a figure which illustrates the state where the 1st heating frame and the 2nd heating frame opened. It is a figure which illustrates the fixation structure of a heating frame and a timing belt. It is a figure which illustrates the structure of a control shaft. It is a figure which illustrates the composition of a regulation roller. It is a figure which illustrates the positioning structure of a 1st heating frame and a 2nd heating frame.

  Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals, and redundant description may be omitted.

  FIG. 1 is a diagram illustrating a schematic configuration of a printing system 100 according to the embodiment.

  As shown in FIG. 1, the printing system 100 includes a paper feeding device 110, a pretreatment liquid coating device 120, a first inkjet printer 130, a reversing device 140, a second inkjet printer 150, a post-drying device 160, and a winding device 170. Have.

  The paper feeding device 110 supplies the recording medium 10 such as a long continuous paper wound in a roll shape to a pretreatment liquid coating device 120 provided in a subsequent stage.

  The pretreatment liquid coating apparatus 120 is an example of a recording medium pretreatment apparatus, and in order to suppress bleeding and show-through of the inkjet ink discharged to the recording medium 10 by the first inkjet printer 130 and the like at the subsequent stage, A pretreatment liquid is applied to the surface. The pretreatment liquid coating apparatus 120 discharges the recording medium 10 to the first inkjet printer 130 at the subsequent stage after heating and drying the pretreatment liquid applied to the recording medium 10.

  The first inkjet printer 130 forms a desired image by ejecting ink droplets on the first surface (front surface) of the recording medium 10 coated with the pretreatment liquid in the pretreatment liquid coating apparatus 120 based on the image data. .

  The reversing device 140 reverses the front and back of the recording medium 10 and conveys the reversed recording medium 10 to the second inkjet printer 150 at the subsequent stage. The reversing device 140 includes a dryer (not shown) as a drying unit, and dries the image on the front side of the recording medium 10 formed by the first ink jet printer 130.

  The second ink jet printer 150 forms a desired image by ejecting ink droplets on the second surface (the back surface before reversal) of the recording medium 10 whose front and back are reversed by the reversing device 140 based on the image data.

  The post-drying device 160 has a dryer as a drying means, and dries the images formed on both surfaces of the recording medium 10 with hot air from the dryer.

  The winding device 170 winds and collects the recording medium 10 on which an image is formed on one side or both sides, and the post-drying device 160 dries the ink on the image forming surface.

  FIG. 2 is a diagram illustrating a schematic configuration of the pretreatment liquid coating apparatus 120 according to the embodiment.

  As shown in FIG. 2, the pretreatment liquid coating apparatus 120 includes an air loop unit 20, a pretreatment liquid coating unit 30, a pretreatment liquid supply unit 40, a heating unit 50, and a dancer unit 80.

  The air loop unit 20 includes a guide roller 21 that is rotatably supported, a feed-in (FI) roller 22 that sandwiches and conveys the recording medium 10, and an FI nip roller 23.

  In the air loop unit 20, the guide roller 21, the rotationally driven FI roller 22, and the driven rotated FI nip roller 23 convey the recording medium 10 supplied from the paper feeding device 110, and draw the recording medium 10 into the air loop unit 20. . At this time, the rotation of the FI roller 22 is controlled by an optical sensor (not shown) so that an air loop AL in which the amount of slack of the recording medium 10 is constant is formed. The recording medium 10 that has passed through the air loop AL is applied with a tension for conveying stabilization by a tension shaft (not shown), and is conveyed to the pretreatment liquid coating unit 30.

  The pretreatment liquid coating unit 30 includes a rotationally driven infeed roller 31, a feed nip roller 32 that sandwiches and conveys the recording medium 10 with the infeed roller 31, a back surface coating unit 33, a front surface coating unit 34, and a rotationally driven outfeed. A feed nip roller 36 that sandwiches and conveys the recording medium 10 between the roller 35 and the outfeed roller 35 is provided.

  The back surface application unit 33 includes a squeeze roller 37, an application roller 38, and a pressure roller 39. The recording medium 10 transported to the back surface coating unit 33 is moved to the second surface by the coating roller 38 when being sandwiched and transported between the coating roller 38 to which the pretreatment liquid is supplied by the squeeze roller 37 and the pressure roller 39. A pretreatment liquid is applied to the (back surface) side. The recording medium 10 that has passed through the back coating unit 33 is conveyed to the front coating unit 34.

  The surface application unit 34 includes a squeeze roller 47, an application roller 48, and a pressure roller 49, and applies the pretreatment liquid to the first surface (front surface) side of the recording medium 10. The recording medium 10 that has passed through the surface coating unit 34 is conveyed to the heating unit 50 by the outfeed roller 35 and the feed nip roller 36.

  The back coating unit 33 and the surface coating unit 34 are controlled so as to selectively operate, and the recording medium 10 is preprocessed on one or both of the first surface (front surface) and the second surface (back surface). Liquid is applied.

  The pretreatment liquid supply unit 40 stores the pretreatment liquid and appropriately supplies the pretreatment liquid to the back surface application unit 33 and the front surface application unit 34.

  The heating unit 50 is an example of a recording medium heating device, and heats the recording medium 10 to dry the pretreatment liquid applied to the recording medium. The heating unit 50 includes a first-stage back surface heating roller 521, a first-stage surface heating roller 511, a second-stage back surface heating roller 522, a second-stage surface heating roller 512, and a third stage from the upstream in the conveyance direction of the recording medium 10. A back surface heating roller 523 and a third stage surface heating roller 513 are provided.

  The heating rollers are staggered so as to be spaced apart from each other. In other words, the lines connecting the rotation centers of the back surface heating rollers 521, 522, and 523 and the lines connecting the rotation centers of the surface heating rollers 511, 512, and 513 are arranged in parallel and away from each other. Further, the front surface heating roller and the back surface heating roller are alternately arranged in the conveyance direction of the recording medium.

  Each heating roller contains a heater 71-76 such as a heater lamp. Moreover, each heating roller may incorporate a heat pipe, for example. With the heat pipe, heat is efficiently transmitted in the longitudinal direction of each heating roller, the temperature of the roller surface is made uniform, and efficient heat supply to the recording medium 10 becomes possible.

  The surface of each heating roller is coated with a non-adhesive film such as a fluororesin. By such coating, adhesion of ink or the like to the surface of the heating roller is suppressed, and a decrease in the efficiency of heat transfer to the recording medium 10 due to deposits on the surface of the heating roller is suppressed.

  Note that the number of heating rollers is not limited to the total of six in the three stages for surface heating and backside heating as described above. A total of 10 or more stages may be used.

  The recording medium 10 is conveyed in a zigzag manner in order on each heating roller. Each heating roller heats the conveyed recording medium 10 and dries the pretreatment liquid applied to the recording medium 10.

  The recording medium 10 on which the pretreatment liquid applied on the surface has been dried is sandwiched between a feed roller 59 and a feed nip roller 60 that are rotationally driven, and conveyed to a dancer unit 80.

  The dancer unit 80 includes two guide rollers 81 and 82, a movable frame 84, position detection means (not shown) for detecting the position of the movable frame 84, and two dancer rollers 85 and 86 rotatably attached to the movable frame 84. Have. The movable frame 84 is provided with a weight 83 at the bottom, and is movable along with the dancer rollers 85 and 86 in the direction of arrow A. The recording medium 10 is wound around the two guide rollers 81 and 82 and the two dancer rollers 85 and 86 in a W shape.

  The dancer unit 80 adjusts the vertical position of the movable frame 84 by controlling the transport amount of the feed roller 59 based on the output of the position detection means (not shown). By adjusting the position of the movable frame 84, a buffer of the recording medium 10 between the pretreatment liquid coating apparatus 120 and the first inkjet printer 130 at the subsequent stage is secured.

  The recording medium 10 heated by the heating unit 50 is cooled by the dancer unit 80 and then conveyed to the first inkjet printer 130 at the subsequent stage.

  Next, the heating unit 50 will be described with reference to the drawings.

  FIG. 3 is a diagram illustrating the heating unit 50 according to the embodiment, and FIG. 4 is a diagram illustrating the heating unit 50 with the main body frame 502 removed. In the following drawings, the X direction indicates the width direction of the heating unit 50, the Y direction indicates the depth direction of the heating unit 50, and the Z direction indicates the height direction of the heating unit 50.

  As shown in FIG. 3, the heating unit 50 includes an opening / closing means 501, a first heating frame 510, and a second heating frame 520. In the following description, the first heating frame 510 side is the upper side and the second heating frame 520 side is the lower side.

  The first heating frame 510 is an example of a first heating unit, and includes a first stage surface heating roller 511, a second stage surface heating roller 512, and a third stage surface heating roller 513, and the recording medium 10 is placed on the first surface. Heat from (surface). The second heating frame 520 is an example of a second heating unit, and includes a first stage back surface heating roller 521, a second stage back surface heating roller 522, and a third stage back surface heating roller 523, and the recording medium 10 is placed on the second surface. Heat from (back side). The first heating frame 510 and the second heating frame 520 are provided so as to be vertically movable in the Z direction by the opening / closing means 501.

  As shown in FIGS. 3 and 4, the opening / closing means 501 includes a main body frame 502, latch handles 503 and 504, and timing belts 571, 572, 573, and 574, and the first heating frame 510 and the second heating frame 520 are connected to each other. Move up and down to open and close each.

  As shown in FIG. 4, the timing belt 571 is provided so as to be able to rotate around the upper pulley 531 and the lower pulley 541. Similarly, the timing belt 572 is provided on pulleys 532 and 542, the timing belt 573 is provided on pulleys 533 and 543, and the timing belt 574 is provided on a pulley 534 and a lower pulley (not shown) so as to be rotatable.

  The pulley 531 on the upper side of the timing belt 571 and the pulley 532 on the upper side of the timing belt 572 are fixed to a first synchronization shaft 575 that is rotatably provided on a main body frame 502 not shown in FIG. Since the pulleys 531 and 532 are fixed to the first synchronization shaft 575, the timing belt 571 and the timing belt 572 rotate synchronously and rotate by the same amount at the same timing.

  Further, the upper pulley 533 of the timing belt 573 and the upper pulley 534 of the timing belt 574 are fixed to a second synchronization shaft 576 that is rotatably provided on a main body frame 502 not shown in FIG. Since the pulleys 533 and 534 are fixed to the second synchronization shaft 576, the timing belt 573 and the timing belt 574 rotate synchronously and rotate by the same amount at the same timing.

  The first synchronization shaft 575 and the second synchronization shaft 576 are respectively provided with gears 577 and 578 fixed to end portions on the same side. A synchronous timing belt 579 is wound around the gears 577 and 578, and the first synchronous shaft 575 and the second synchronous shaft 576 are rotated in synchronization by the synchronous timing belt 579.

  As described above, the timing belts 571, 572, 573, and 574 are provided so as to rotate synchronously by the first synchronization shaft 575, the second synchronization shaft 576, and the synchronization timing belt 579. Therefore, when any one of the timing belts 571, 572, 573, and 574 rotates, the other three rotate in the same manner.

  Here, the timing belts 571, 572, 573, and 574 are respectively stretched around two pulleys, and are formed so that two stretched portions extending in the Z direction face each other in the X direction. In such a configuration, the first heating frame 510 is fixed to the first stretching portion on one side of the two stretching portions of the timing belts 571, 572, 573, and 574 by the fixing portions 551, 552, 553, and the like. It is fixed. In addition, the second heating frame 520 is fixed to the second stretching portion on the other side of the two stretching portions of the timing belts 571, 572, 573, and 574 by fixing portions 561, 562, 563, and the like.

  Next, an opening / closing operation of the first heating frame 510 and the second heating frame 520 in the heating unit 50 will be described.

  5A and 5B are schematic views from the front of the heating unit 50. FIG. 5A is a closed state of the first heating frame 510 and the second heating frame 520, and FIG. 2 illustrates an open state of the heating frame 520.

  As shown in FIG. 5, the first heating frame 510 is fixed to the first stretched portion 572 a of the timing belt 572 and the first stretched portion 573 a of the timing belt 573. Similarly, the first heating frame 510 is fixed to a timing belt 571 (not shown in FIG. 5) and a first stretched portion of the timing belt 574.

  In addition, the second heating frame 520 is fixed to the second stretched portion 572b facing the first stretched portion 572a of the timing belt 572 and the second stretched portion 573b facing the first stretched portion 573a of the timing belt 573. Has been. Similarly, the second heating frame 520 is fixed to a timing belt 571 (not shown in FIG. 5) and a second stretching portion facing the first stretching portion of the timing belt 574.

  In such a configuration, the first heating frame 510 and the second heating frame 520 are opened and closed by moving the other heating frame up and down in synchronization with the movement of one heating frame up and down.

  The first heating frame 510 and the second heating frame 520 are shown in FIG. 5B when the opening / closing handle 505 is grasped and the second heating frame 520 is pushed downward from the closed state shown in FIG. 5A. Opened. When the second heating frame 520 is pushed down, the timing belts 572 and 573 rotate in the direction of the arrow shown in FIG. 5B while being synchronized by the synchronous timing belt 579 as shown in FIG. 5B. To do. When the timing belts 572 and 573 rotate in this way, the first heating frame 510 fixed to the first stretching portions 572a and 573a moves upward and is in an open state.

  When the second heating frame 520 is lifted upward from the open state, the timing belts 572 and 573 rotate in the direction opposite to the arrow shown in FIG. 5B, and the first heating frame 510 moves downward and moves to FIG. The closed state shown in FIG.

  In this manner, in the heating unit 50, when the second heating frame 520 provided with the opening / closing handle 505 is moved up and down, the first heating frame 510 moves in the opposite direction to the second heating frame 520 and opens and closes. To do. Therefore, for example, when the recording medium 10 is loaded or when the recording medium 10 is jammed, as shown in FIG. 6, the first heating frame 510 and the second heating frame 520 are opened to perform loading or maintenance of the recording medium 10. It can be done easily.

  After loading and maintenance of the recording medium 10 in the open state, if the first heating frame 510 and the second heating frame 520 are closed, the recording medium 10 becomes the front surface heating rollers 511, 512, 513 and the back surface heating rollers 521, 522, 523. It becomes the state that can be operated.

  The opening / closing handle 505 may be provided on the first heating frame 510 or on both the first heating frame 510 and the second heating frame 520.

  FIG. 7 is a view illustrating a fixing structure between the first heating frame 510 and the timing belt 571. As shown in FIG. 7, the first heating frame 510 and the timing belt 571 are fixed by a fixing portion 551.

  The fixing portion 551 is fixed to the side surface of the first heating frame 510 and has a fixing plate 555 provided along the outer peripheral surface of the timing belt 571, and opposed plates 556 and 567 that sandwich the timing belt 571 between the fixing plate 555 and the fixing plate 555. .

  The opposed plates 556 and 557 are fixed to the fixed plate 555 by screws 558 and 559 with the timing belt 571 interposed therebetween. The opposing plates 556 and 557 are provided with grooves that mesh with teeth provided on the inner peripheral surface of the timing belt 571.

  The first heating frame 510 is fixed to the timing belt 571 by a fixed plate 555 and opposing plates 556 and 557 that mesh with teeth of the timing belt 571, and moves up and down as the timing belt 571 rotates.

  As shown in FIG. 4, the first heating frame 510 is fixed to the timing belts 572, 573, 574 by fixing portions 552, 553 having the same configuration as the fixing portion 551, and the timing belts 571, 572, 573, 574. It moves up and down with the rotation. The second heating frame 520 is fixed to the timing belts 571, 572, 573, and 574 by fixing portions 561, 562, and 563 having the same structure as the fixing portion 551, and the timing belts 571, 572, 573, and 574 Moves up and down with rotation.

  The opening / closing means 501 of the heating unit 50 includes a restriction shaft 590 and a restriction roller 595, which will be described later, as restriction members that restrict the positions of the first heating frame 510 and the second heating frame 520 in the XY plane and the movement direction in the Z direction. Is provided.

  As shown in FIGS. 3 and 4, both ends of the restriction shaft 590 are fixed to the main body frame 502 so that the axial direction is substantially parallel to the moving direction (Z direction) of the first heating frame 510 and the second heating frame 520. Has been.

  FIG. 8 is a diagram illustrating the configuration of the restriction shaft 590.

  An L-shaped plate 591 is fixedly provided on the first heating frame 510. A sleeve bearing 592 as an annular member into which the restriction shaft 590 is inserted is provided on a portion of the plate 591 that protrudes from the side surface of the first heating frame 510. Similarly, the second heating frame 520 is provided with a plate 593 and a sleeve bearing 594, and a restriction shaft 590 is inserted into the sleeve bearing 594.

  With such a configuration, the first heating frame 510 and the second heating frame 520 are positioned in the XY plane by the restriction shaft 590 and move in the vertical direction (Z direction) along the restriction shaft 590 during the opening / closing operation. Therefore, in the first heating frame 510 and the second heating frame 520, for example, the timing belts 571, 572, 573, and 574 are not bent and are not displaced in the X direction or the Y direction.

  FIG. 9 is a diagram illustrating the configuration of the regulation roller 595.

  The regulation roller 595 is rotatably provided on the side surface of the first heating frame 510. The main body frame 502 is provided with a rail-shaped regulation guide 597 that guides the regulation roller 595 and regulates the moving direction of the first heating frame 510.

  The regulation guide 597 is provided substantially parallel to the moving direction (Z direction) of the first heating frame 510 and the second heating frame 520, and guides the regulation roller 595 in the first heating frame 510 and the second heating frame 520. . The movement direction of the first heating frame 510 during the opening / closing operation is regulated by the regulation roller 595 being guided by the regulation guide 597. Further, a restriction roller and a restriction guide for restricting the moving direction of the second heating frame 520 may be provided with the same configuration.

  With such a configuration, the moving directions of the first heating frame 510 and the second heating frame 520 are restricted, and the opening and closing operations do not move in different directions due to, for example, bending of the timing belts 571, 572, 573, and 574. Open and close by moving in a predetermined direction.

  Further, the opening / closing means 501 of the heating unit 50 is provided with a latch shaft 580 for positioning in the Z direction when the first heating frame 510 and the second heating frame 520 are closed.

  The latch shaft 580 is an example of a positioning member, and as shown in FIGS. 3 and 4, both ends are fixed to the main body frame 502 so that the axial direction is parallel to the X direction.

  FIG. 10 is a diagram illustrating a positioning structure of the first heating frame 510 and the second heating frame 520.

  The first heating frame 510 is provided with an abutting member 581 at a position facing the latch shaft 580 in the closed state. The second heating frame 520 is provided with an abutting member 582 at a position facing the latch shaft 580 in the closed state.

  The abutting members 581 and 582 abut against the latch shaft 580 when the first heating frame 510 and the second heating frame 520 are closed. The abutting members 581 and 582 abut against the latch shaft 580, whereby the first heating frame 510 and the second heating frame 520 are positioned in the Z direction in the closed state.

  The abutting members 581 and 582 are preferably provided so that the position in the Z direction can be adjusted so that the amount of winding of the recording medium 10 around the heating roller can be appropriately changed.

  Further, the weight of the first heating frame 510 and the weight of the second heating frame 520 are provided to be substantially equal. Since the first heating frame 510 and the second heating frame 520 have substantially the same weight, the timing belts 571, 572, 573, and 574 do not rotate and move with any one of the weights. Accordingly, the first heating frame 510 and the second heating frame 520 can move up and down and remain at an arbitrary position.

  As described above, according to the heating unit 50 according to the present embodiment, the first heating frame 510 and the second heating frame 520 move up and down and open and close. The heating unit 50 is provided with the first heating frame 510 and the second heating frame 520 so as to be openable and closable, so that the recording medium 10 can be easily loaded and maintained.

  The recording medium heating apparatus, the recording medium pretreatment apparatus, and the printing system according to the embodiments have been described above. However, the present invention is not limited to the above embodiments, and various modifications and improvements can be made within the scope of the present invention. Is possible.

10 recording medium 50 heating unit (recording medium heating device)
100 Printing System 120 Pretreatment Liquid Application Device (Recording Medium Pretreatment Device)
501 Opening / closing means 510 First heating frame (first heating means)
520 Second heating frame (second heating means)
531, 532, 533, 534 Upper pulley 541, 542, 543, 544 Lower pulley 571, 572, 573, 574 Timing belt (endless belt)
572a, 573a First stretched portion 572b, 573b Second stretched portion 575 First synchronization shaft 576 Second synchronization shaft 577, 578 Gear 579 Synchronization timing belt (synchronization belt)
580 Latch shaft (positioning member)
581,582 Abutting member 590 Regulating shaft 592,594 Sleeve bearing (annular member)
596 Regulation Roller 597 Regulation Guide

Japanese Patent Laid-Open No. 10-202839

Claims (10)

A recording medium heating apparatus for heating a recording medium to be conveyed,
First heating means for heating the recording medium from one side;
A second heating means for heating the recording medium from the other surface side;
The first heating means is fixed to a first stretch part between the plurality of pulleys, and the second heating means is provided to a second stretch part facing the first stretch part. A recording medium heating apparatus comprising: a plurality of fixed endless belts; and an opening / closing means for holding the first heating means and the second heating means so as to be freely opened and closed. The opening / closing means includes a first pulley on which a first endless belt is stretched and a second pulley on which a second endless belt is spanned, and a first pulley that synchronizes the rotation of the first endless belt and the second endless belt. The recording medium heating apparatus according to claim 1, further comprising a synchronous shaft. The opening / closing means includes a third pulley on which a third endless belt is stretched and a fourth pulley on which a fourth endless belt is spanned, and a second pulley that synchronizes the rotation of the third endless belt and the fourth endless belt. A synchronous shaft;
An endless shape that spans between a first gear provided on the first synchronization shaft and a second gear provided on the second synchronization shaft, and synchronizes the rotation of the first synchronization shaft and the second synchronization shaft. The recording medium heating apparatus according to claim 2, further comprising: a synchronous belt. 4. The opening / closing handle that is gripped and used for an opening / closing operation is provided on at least one of the first heating unit and the second heating unit. 5. Recording medium heating device. 5. The recording medium heating apparatus according to claim 1, wherein a weight of the first heating unit is substantially equal to a weight of the second heating unit. The opening / closing means is provided substantially parallel to the opening / closing direction of the first heating means and the second heating means, and is inserted into an annular member provided in each of the first heating means and the second heating means to move. 6. The recording medium heating apparatus according to claim 1, further comprising a restriction shaft that restricts a direction. The opening / closing means is provided substantially parallel to the opening / closing direction of the first heating means and the second heating means, and guides a regulating roller provided in at least one of the first heating means and the second heating means. The recording medium heating apparatus according to claim 1, further comprising a rail-shaped regulation guide that regulates a moving direction. The opening / closing means has a positioning member for positioning the first heating means and the second heating means by abutting against the abutting members respectively provided in the first heating means and the second heating means in the closed state. The recording medium heating apparatus according to claim 1, wherein the recording medium heating apparatus is a recording medium heating apparatus. A recording medium heating apparatus according to any one of claims 1 to 8,
A recording medium pre-processing apparatus, comprising: a coating apparatus that is provided upstream of the recording medium heating apparatus and that applies a processing liquid to the recording medium. A recording medium pre-processing device according to claim 9,
A printing system comprising: a printing apparatus provided at a subsequent stage of the recording medium pre-processing apparatus and printing an image on the recording medium.

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