JPH0924604A - Stencil printing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve printing for eliminating the offset of a printing paper by burying a plurality of heat generating elements independently and in parallel with an axis at the outer periphery of a press roller rotating in contact with the outer-periphery surface of a printing drum and controlling the energization of each heat generating element according to the rotation of the press roller. SOLUTION: At the time of stencil printing, a printing paper 62 is supplied to an area to a press roller 103 which is arranged oppositely to a printing drum 10 and can contact and leave the printing drum 101 and is printed at a printing part A. In this case, a heating means 2 is provided at the press roller 103. The heating means 2 has a plurality of heat generating elements 3 being provided independently and in parallel at the press roller 103 while being extended in the axial direction of a roller shaft 7 and a pair of body side electrodes 4 being fixed to the side of a body cabinet 50 and is energized with a power supply 6. Then, the heat generating elements 3 generate heat at a downstream side in a paper carrying direction from the printing part A, thus drying a printed ink image I and hence prevent printing ink from being offset.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stencil printing machine, and more particularly, to sheet conveyance and sheet drying after printing.

[0002]

2. Description of the Related Art In a conventional stencil printing machine, in order to smoothly discharge the stencil-printed printing paper to a paper ejection tray, a paper ejection adsorption unit for conveying the printing paper to the paper ejection tray is used. In this paper discharge suction unit, a suction belt is provided with a conveyor belt having a plurality of suction holes and a suction fan. The suction fan and the conveyor belt operate when the print switch is pressed, and the conveyor belt that rotates while sucking ejects the printing paper to the paper ejection tray. In the vicinity of the paper discharge suction unit, a separating unit for separating the printed printing paper from the outer peripheral surface of the printing drum, that is, an air knife, which blows out air from the tip of a separating claw, is arranged. Emulsion ink mainly composed of ink oil and water is used for the printing ink used in these stencil printing machines. When this ink is placed on the printing paper, Penetration requires some time.

[0003]

In such a stencil printing machine, before the printing ink of the printing paper on which the stencil printing is performed first is dried, the next printing paper on which the stencil printing is performed is conveyed and If it is placed on the paper, there is a problem that so-called set-off occurs. As means for preventing such set-off, for example, JP-A-3-923.
77, JP-A-5-330016, JP-A-6
In Japanese Patent Laid-Open No. 134970/1993, there is disclosed a means for heating a printing paper sheet to be conveyed above a sheet conveyance path located in front of and behind a press roller provided so as to face a printing drum around which a punched master is wound. It is arranged. However, disposing the heating means individually and above the sheet conveying path in this way complicates the layout in the apparatus. When the heating unit is configured to emit warm air, the generated warm air will affect the conveyance of the printing paper. When the heating means is arranged on the discharge side of the press roller as a roller type, the heated roller contacts the printing surface of the printing paper, and the ink of the printing paper adheres to the heated roller to form an image on the printing paper. This will cause stains.

Further, Japanese Utility Model Laid-Open No. 62-182767 discloses a technique in which a heating means is provided on an ink roller arranged to face the press roller. With such a configuration, it is possible to prevent the layout in the apparatus from becoming complicated, but the ink characteristics change such that the ink around the ink roller is heated and the fluidity increases. When the fluidity of the ink increases, the amount of ink supplied to the printing paper increases, which makes it difficult for the ink to dry and causes set-off.

Another problem is that the conveyor belt is provided with a suction hole connected to a suction fan, and an air knife is used as a separating means. The problem is that the blowing noise of the air knife is large, and the conveyor belt, suction fan, and air knife operate when the print switch is turned on, so they are in operation even when printing paper is not being fed to the printing unit. Becomes a noise source. In addition, when the conveyor belt is placed opposite to the print drum, when the print paper is jammed between the conveyor belt and the print drum, the ink printed on the print paper adheres to the print drum when the paper is removed. There is also a problem that the printing drum becomes dirty. An object of the present invention is to provide a stencil printing apparatus that enables printing without offsetting to a printing paper, and to provide a stencil printing apparatus that enables stable paper transportation with low noise. Another object of the present invention is to provide a stencil printing machine capable of releasing jammed printing paper without contaminating the printing drum.

[0006]

Therefore, in the invention according to claim 1, in a stencil printing apparatus for performing stencil printing by winding a perforated master on the outer peripheral surface of the printing drum, the outer peripheral surface of the printing drum. A plurality of heating elements each independently embedded in the outer periphery of the press roller or the impression cylinder rotating in contact with the shaft, in parallel with the axis of the press roller or the impression cylinder, and each of the plurality of heating elements. Heating means having a main body side electrode that individually contacts the electrode of the heating element by rotation of the press roller or the impression cylinder, and a current supply source that supplies a current to the main body side electrode when the printing paper of the stencil printing apparatus is conveyed. It is equipped with According to the second aspect of the present invention, when the printed printing paper is conveyed, or after the printing paper that has finished printing passes through the printing portion formed between the printing drum and the press roller or the printing drum and the impression cylinder,
It is provided with a control means for supplying a current to the main body side electrode. According to a third aspect of the invention, the electrode on the main body side is connected to the electrodes of the plurality of heating elements arranged at the ends of the respective shafts of the press roller or the impression cylinder, and the electrodes of the printing drum and the press roller or the printing drum and the impression cylinder are provided. The sheet is in contact with the printing section formed between the sheets in the sheet discharge direction. In the invention according to claim 4,
A stencil printing machine having the above heating means is rotatably supported between a plurality of rollers and conveys a bias from a high-voltage power supply to the inside. Means were provided. According to a fifth aspect of the present invention, there is provided a belt heating unit that heats the medium resistance conveyance belt when the printing paper on which printing has been completed is conveyed.

In a sixth aspect of the present invention, a master that has been perforated has been wound around a plurality of rollers and rotatably supported by a stencil printing device that winds by wrapping the master on the outer peripheral surface of a printing drum. A transporting unit having a medium-resistance transporting belt, to which a bias from a high-voltage power supply is supplied by a transporting bias roller, and a heating unit that heats the medium-resistance transporting belt at the time of transporting the printing paper after printing is provided. In the invention according to claim 7, the heating means is arranged below the conveying means. According to the invention described in claim 8, one side of the plurality of rollers is swingably supported with the other side of the plurality of rollers as a fulcrum, and the medium resistance conveyance belt is supported so as to be capable of contacting and separating from the printing drum. According to a ninth aspect of the invention, there is provided a releasing means for releasing the proximity state between the medium resistance conveyance belt and the printing drum.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. First, a schematic configuration and a series of operations of a stencil printing apparatus integrated with plate making and printing will be described. Reference numeral 1 in FIG.
The stencil printing apparatus indicated by is a main body cabinet 50, a paper feeding / discharging unit 60, a plate discharging unit 70, a reading unit 80, a plate making / plate supplying unit 9
0, a drum unit (image forming unit) 100. In the stencil printing apparatus 1, when the original 63 is set on the original receiving stand 80a provided on the upper part of the main body cabinet 50 and a plate making start key (not shown) is turned on, the printing drum (plate cylinder) 101 of the drum unit 100 is moved to the arrow D. It is designed to rotate in the direction. When the print drum 101 rotates, the used master 6 mounted on the outer peripheral surface of the print drum 101
1'is the peeling rollers 71a, 71b, the belts 72a, 72b and the rollers 7 of the plate discharge portion 70 arranged in the rotation direction.
In the plate discharge peeling / conveying unit composed of 3a and 73b, the plate is peeled off from the printing drum 101 and delivered and discharged into the plate discharge box 74. Then, the used master 61 ′ is compressed inside the plate discharge box 74 by the compression plate 75 arranged above the plate discharge box 74 so as to be movable up and down.

In the reading unit 80, the separation roller 81, the pair of front original conveying rollers 82a and 82b, and the pair of rear original conveying rollers 83a and 83b are rotationally driven by a driving means (not shown), and the original 63 placed on the original receiving tray 80a. Are transported on the contact glass 85 for exposure reading.

For exposure reading, the pair of front original conveying rollers 82 is used.
While the original 63 is being conveyed onto the contact glass 85 arranged between the pair of a and 82b and the rear original conveying rollers 83a and 83b, the original 63 is exposed by the fluorescent lamp 86 provided below the contact glass 85. The reflected light from the exposed surface of the original 63 passes through the mirror 87 and the lens 88 to C
2 which is provided in the main body cabinet 50 by being incident on the image sensor 89 such as a CD and photoelectrically converted into an electric signal.
Is input to the A / D converter 34 shown in FIG. A / D converter 3
The reflected light input to 4 is converted from analog to digital,
Image data is stored in the memory 39 through the CCD image processing unit 35 and the main controller 37 constituting the control means 30. Instead of storing this image data in the memory 39, the image data may be directly transferred to the thermal head 91 described later via the thermal head image processing unit 36 connected to the main controller 37.

As shown in FIG. 1, in the plate making / plate feeding unit 90, in parallel with the image reading operation, a pair of feed rollers 94a and 94b driven by a drive motor (not shown) and a platen roller 92 wind the roll. The unperforated master 61 that has been punched is unwound from the roll state and conveyed. The master 61 has a laminated structure in which a very thin thermoplastic resin film such as polyester and a porous support formed by mixing Japanese paper and synthetic fibers are bonded together.
The master 61 includes a platen roller 92 and the roller 9
In accordance with a digital image signal which is sandwiched between a thermal head 91 arranged opposite to the image sensor 2 and subjected to various processing by the A / D converter 34, each image processing unit 35, 36 and the control means 30 and sent. Then, a plurality of heating elements (not shown) arranged in a line on the thermal head 91, which selectively generates heat, melts and perforates the plate.

After the completion of the plate discharging operation of the used master 61 ', the leading end of the master 61 made into a plate is conveyed to the drum portion 100 side via the pair of feed rollers 94a and 94b.
It is sent to a master clamper 102 provided on a part of the outer peripheral surface of the print drum 101 which is rotationally driven in the direction of arrow C by a drive motor (not shown). Master clamper 102
Clamps the leading end of the master 61 at a fixed timing and can be opened and closed with respect to the outer peripheral surface of the printing drum 101. This clamper 102 is closed and the master 61
When the tip of the
The master 61 is gradually wound around the outer peripheral surface of the printing drum 101 by being rotationally driven in the direction.

A cutter 95 is arranged between the pair of feed rollers 94a and 94b and the platen roller 92.
The master 61, which has completed the plate making, is cut into a certain length by the cutter 95 to become one master 61, which is completely wound around the outer peripheral surface of the printing drum 101. In the stencil printing machine 1, it is said that the plate feeding is completed by this operation.

The paper feeding / discharging unit 60 feeds the print paper 62 stacked on the paper feed tray 51 arranged on the right side of the print drum 101 toward the print drum 101, and also feeds the paper feed tray 5.
The printed printing paper 62 is ejected to the paper ejection tray 52 arranged on the left side of the printing drum 101 located on the side opposite to 1. The paper feeding / discharging unit 60 includes a paper feeding roller 110 and a separation roller pair 111a, 1 arranged on the front end 62a side of the printing paper 62.
11b, the uppermost one of the stacked printing papers 62 is delivered to the registration rollers 112a and 112b. The registration rollers 112a and 112b are adapted to be rotationally driven at a predetermined timing synchronized with the rotation of the printing drum 101, and the printing paper 62 to be conveyed.
Is delivered to the printing unit A formed between the press roller 103 and the printing drum 101, which is disposed so as to face the printing drum 101 and is supported so as to be able to come into contact with and separate from the printing drum 101.

The press roller 103 is usually placed at an initial position separated from the print drum 101 indicated by a chain double-dashed line, and when the print paper 62 reaches between the print drum 101 and the press roller 103, a drive not shown is driven. The mechanism raises the print drum 101 to the operating position shown by the solid line.
The printing paper 62 is pressed against the master 61 mounted on the outer peripheral surface of the printing drum 101 by abutting and urging the outer peripheral surface of the printing paper 62. The press roller 103 is provided with the heating means 2 which is one of the features of the present application.

The printing drum 101 is provided with a large number of openings (not shown) for allowing ink to pass through the so-called image area except for both side edges thereof and the clamper 102 and its peripheral portion. Inside the print drum 101, the print drum 1
An ink roller 104 that contacts the inner peripheral surface of 01 and rotates;
A doctor roller 106 that is arranged at a slight distance from the ink roller 104 and forms an ink pool 105 between the ink roller 104 and an ink supply pipe 107 that supplies printing ink to the ink pool 105 are arranged. An appropriate amount of printing ink is supplied to the inner peripheral surface of the printing drum 101.

Therefore, when the printing paper 62 is pressed against the master 61 by the press roller 103, the master 61 is pressed.
The printing ink oozes out from the perforated portion and is transferred onto the printing paper 62, and the ink image corresponding to the perforated image of the master 61 is printed. As the printing ink described here, an emulsion ink made by mixing a pigment, an emulsifier, etc. in water is used.

The printing paper 62 printed in this way
When the sheet passes between the press roller 103 and the print drum 101, the discharged sheet is arranged on the left side of the drum, which is the downstream side in the rotation direction of the print drum 101, that is, on the sheet discharge direction side indicated by the arrow B with respect to the press roller 103. Peeling claw 113
Is peeled off from the print drum 101 by the
Driven roller 114 and drive roller 1 arranged below
The sheet is conveyed by the conveying device 107 including the conveying belt 116 that is stretched around the sheet 15, and is ejected onto the sheet ejection tray 52. This first printing corresponds to printing, and after printing is finished, the number of prints is set by a ten key (not shown), and when the print start key provided on the operation unit 42 of FIG. 2 is turned on, paper feeding is performed similarly to printing. The steps of printing, discharging, and the like are repeated as many times as the set number of prints, and each printing paper 62 is discharged in the paper discharge direction and sequentially stacked on the paper discharge tray 52.

As shown in FIG. 3, the heating means 2 includes a plurality of heating elements 3 provided on the press roller 103, a pair of main body side electrodes 4,5 fixed to the main body cabinet 50 side, and the electrodes 4,5. A power supply 6 is provided as a current supply source for supplying a current to the. The plurality of heat generating elements 3 extend in the axial direction of the roller shaft 7 supporting the press roller 103 and are arranged in parallel independently on the outer periphery of the press roller 103 having the base portion 103a of the conductive member. An insulating member 8 is arranged between the heating elements 3 so that the heating elements 3 do not come into contact with each other. When the insulating member 8 is not provided, a space or the like may be provided between the heating elements 3 so that each heating element 3 can generate heat individually.

The roller shaft 7 is formed of an insulating member, and a conductive portion 7A corresponding to the space between the heating elements 3 is axially extended and arranged on the surface of the roller shaft 7. The roller shaft 7 is
Both ends 7a, 7b are rotatably supported by both ends 9a, 9b on the opening side of a bracket 9 formed in a U shape by an insulating member. The bracket 9 has a base end 9A swingably supported about an axis 10 and is connected to a contacting / separating unit such as an electromagnetic solenoid (not shown), and the press roller 103 is attached to the printing drum 101. It is supported so that it can come into contact with and separate from it (see Fig. 1).

On both ends 7a and 7b of the roller shaft 7, the electrode portions 11 and 12 of each heating element 3 are fixed outside the tips 9a and 9b. The electrode parts 11, 12 are the electrode parts 11, 1
The surface of 2 is divided into a number corresponding to the number of heating elements 3,
A plurality of slits 13 and 14 for insulation are arranged between the conductive members to form a columnar shape. The parts divided by these slits 13 and 14 are electrodes 11a and 12a of the heating element 3, respectively.

The tips 4a, 5a of the body side electrodes 4, 5 are bent downward so that the tips 4a, 5a contact the electrodes 11a, 12a. The main body side electrode 4 is connected to the power supply 6, and the main body side electrode 5 serves as a ground terminal. These body side electrodes 4 and 5 are shown in FIG.
As shown in FIG. 1, the electrodes 11a, 1 are provided on the downstream side (left side in the drawing) in the sheet conveying direction indicated by the arrow B with respect to the printing portion indicated by the arrow A.
2a are arranged so as to be in contact with each other (in FIG. 4, only one side is shown).

As shown in FIG. 2, the main controller 37 composed of a CPU has a ROM 38 and a RAM 39, an operation section 42 provided with a plate-making start key and a print start key (not shown), various sensors 41 arranged in the apparatus, and Various loads 40 and a power supply 6 as a current supply source are connected. The power supply 6 supplies a current to heat the heating element 3 at the main body side electrode 4 when the current supply timing determined by the main controller 37 is reached by the inputs from the various loads 40 and various sensors 41 input to the main controller 37.
To be energized. The current supply timing here means at least the time when the printing paper 62 reaches the printing unit A, and preferably the printed printing paper 62 is printed.
Is the time when the front end 62 a of the sheet passes through the printing unit A. As a method of detecting this signal, for example, the registration roller pair 11
The movement time from 2a, 112b to the printing unit A is set to RO in advance.
The registration roller pair 112a, 1 is set to M38.
When 12b is driven, counting is started and the printing paper 62
The power supply 6 is controlled to operate for a set time according to the size of the.

According to the heating means 2 having such a structure, when the printing paper 62 reaches the printing portion A at a predetermined timing, the power source 6 works and the main body side electrode 4 is energized. The current supplied to the electrode 4 is supplied to the heating element 3 which is in contact with the electrode 4 via the electrode 11a and the conductive portion 7A of the roller shaft 7. Then, as shown in FIG. 4, the heating element 3 on the press roller 103, which is in contact with the electrode 11a, generates heat on the downstream side of the printing section A in the paper conveyance direction indicated by the arrow B, and printing is completed. The printing paper 62 that has passed through the printing unit A is heated to act to dry the printed ink image I. That is, the printing paper 62 is heated while being transported from the printing unit A to the transporting unit 107 to accelerate the drying of the ink image I.

As described above, by providing the heating element 3 on the press roller 103 constituting the printing section A, the printing paper 62 can be obtained.
Is heated from the side of the back surface 62c where the ink image I is not printed, so that the printing drum 101 and the press roller 103 themselves are prevented from being soiled due to the contact between the ink image I and the heating means 2. Further, although a plurality of heating elements 3 are provided on the outer peripheral surface of the press roller 103, the portion that generates heat is located at a position displaced from the printing unit A, that is, on the downstream side in the paper transport direction, and thus the printing drum. It is possible to prevent heating of the printing ink supplied to the inside of 101. This suppresses the change in the fluidity of the printing ink in the printing drum 101, and prevents the delay of the drying of the ink image I due to the outflow of a large amount of ink due to the increased fluidity. In addition, the heating unit 2 blows warm air on the conveyed printing paper 62 to blow the ink image I on the printing paper 62, as in the conventional case.
Since it is not of a type for drying, the blowing of warm air does not affect the feeding of the printing paper 62, and stable paper feeding can be performed.

(Second Embodiment) In this embodiment, as shown in FIGS. 5 and 6, the heating means 2 in the first embodiment is provided on an impression cylinder 117 which is rotationally driven in synchronization with the printing drum 101. This is an example. Since only the configuration in the vicinity of the impression cylinder 117 is different from the first embodiment, only the different points will be described below, and the same components as those in the first embodiment are designated by the same reference numerals as those in the first embodiment. The description thereof will be omitted.

The impression cylinder 117 has a flat surface 117A formed by axially notching a part of a cylindrical outer peripheral surface. This flat surface 117A is the same as the clamper 10 on the printing drum 101.
It constitutes two reliefs. The impression cylinder 117 is the clamper 1
When 02 is located at the bottom, the flat surface 117A is arranged so as to face the clamper 102. A gear 119 is fixed to one end of a shaft 118 that supports the impression cylinder 117. The gear 119 meshes with a drive mechanism of the drum 101 (not shown), and rotationally drives the impression cylinder 117 in synchronization with the print drum 101 (see FIG. 1 for the configuration near the print drum 101).

On the peripheral surface portion 117B of the impression cylinder 117, a plurality of heating elements 3 extend in the axial direction of the shaft 118 and are arranged side by side independently of each other. The shaft 118 is formed of an insulating member, and a conductive portion 118A corresponding to the space between the heating elements 3 extends in the axial direction on the surface of the shaft 118. The shaft 118 is rotatably supported by a frame of a device (not shown). At both ends 118a and 118b of the shaft 118,
The electrode 4 connected to the power supply 6 and the grounded electrode 5 are located on the downstream side of the printing section A ′ formed between the impression cylinder 117 and the printing drum 101, respectively, in the sheet conveying direction indicated by the arrow B, and the electrode section 11 is provided. , 12 are in contact with.

As described above, even if the heating elements 3 constituting the heating means 2 are individually provided to be able to generate heat and the heating elements 3 are made to generate heat on the downstream side of the printing section A'in the sheet conveying direction, the printing section A The ink image I transferred to the printing paper 62 by 'can be dried as in the first embodiment.

(Third Embodiment) This embodiment shown in FIG.
This is an example in which the conveying means 107 in the first example is changed. Since the configuration other than the transport means 107 is the same as that of the first embodiment, its description is omitted. The transport means 200 in the third embodiment includes a transport belt 203 wound around a driving roller 201 and a driven roller 202,
A transport bias roller 204 that applies a bias to the transport belt 203 and a high-voltage power supply 205 that serves as a bias supply unit for the transport bias roller 204 are provided. The drive roller 201 is adapted to rotate in synchronization with the print drum 101 via a drive transmission mechanism (not shown). The driving roller 201 and the driven roller 202 are made of a conductive member and are grounded via a high voltage power supply 205. The conveyor belt 203 has an electric resistance value of 10 ⁸ to 10 ¹¹ Ω · cm as described in JP-A-53-96838.
It consists of a medium resistance conveyor belt. A bias is supplied from the transport bias roller 204 to be charged, and the printing paper 62 is electrostatically attracted to the upper surface of the belt 203.

The high voltage power source 205 is the CPU 37 shown in FIG.
Printing paper 62 that is connected to the CPU 37 and judged by the CPU 37
When the printing timing of
A bias current is supplied to the. The bias supplied to the transport bias roller 204 is CP
U37 is applied by a constant current method in which the current is constant in the high voltage power supply 205.

In the stencil printing machine having the transport means 200 having such a structure, when printing is performed as described above,
A bias current is applied to the conveyance bias roller 204 from the high-voltage power supply 205 by a signal from the CPU 37, and the conveyance belt 203 is charged. Then, printing is completed in the printing unit A, and the printing paper 62, which tends to adhere to the outer periphery of the printing drum 101 due to the viscosity of the printing ink, becomes the charged transport belt 2.
When the printing paper 62 is electrostatically polarized when it contacts 03,
Water in the printing ink is also electrostatically polarized, and the printing paper 62 is electrostatically adsorbed to the conveyor belt 203 by the electrostatic separation action. At this time, the printing paper 62 that has completed printing is smoothly separated from the outer peripheral surface of the printing drum 101 due to its rigidity and curvature separation from the printing drum 101.

In the printed printing paper 62,
Unless the print area is a solid image covering the entire surface of the paper, the print paper 62 has a front end 62a and a rear end 62 as shown in FIG.
Since there is a blank space S in the area b or between the binding margin and the ink image I, the blank space S is charged by the conveyor belt 203. Therefore, the printing paper 62 that has passed through the printing unit A
Will be reliably separated from the printing drum 101 from the front end 62a thereof and will be adsorbed to the conveyor belt 203. The separated printing paper 62 is electrostatically and firmly adsorbed by the conveyor belt 203, and is ejected to the paper ejection tray 52.

The printing paper 62 that has passed through the printing section A is heated by the heating means 2 provided on the press roller 103 shown in FIG. 3, so that the ink image I printed on the printing paper 62 is conveyed. To be dried. Further, since the driving roller 201 and the driven roller 202 are grounded, the charged transport belt 203 and the printing paper 62 approach the driving roller 201 side, that is, as the transportation of the printing paper 62 progresses, the charge is removed. To be done. Therefore, the separation of the conveyor belt 203 and the printing paper 62 is
Conveyor belt 20 in the vicinity of the body and drive roller 201
Curved 3 makes it smooth.

As described above, since the printing paper 62 heated by the heating means 2 is electrostatically and securely attracted to the carrying belt 203 and is carried, the printing paper 62 is conventionally used by the air nozzle, the suction fan or the like. Is separated from the printing drum 101, or the ink image I on the printing paper 62 can be dried while the noise generated by the apparatus is reduced as compared with the case where it is adsorbed on the conveyor belt 203. The stencil printing machine has very little transfer. In this embodiment, the stencil printing machine using the press roller 103 has been described, but it is of course applicable to the stencil printing machine using the impression cylinder 117 shown in the second embodiment. Further, instead of the press roller 103, a conventional press roller that does not include the heating element 3 may be used.

(Fourth Embodiment) In this embodiment, as shown in FIG. 9, the conveying means 200 is provided with a heat lamp 206 as a belt heating means. Heat lamp 20
6 is connected to a power source 6 placed under the control of the CPU 37, and receives heat from the power source 6 to generate heat at the paper feed timing of the printing paper 62 calculated by the CPU 37. The heat lamp 206 is arranged near the driven roller 202 below the conveying means 200, and is separated from the printing paper 62 and returns downward to move in the direction of arrow E, that is, printing on the conveying belt 203A that is conveyed backward. The contact surface side with the paper 62 is heated.

According to this structure, when the conveying bias roller 204 applies a bias to the conveying belt 203, the conveying belt 203 heated by the heat lamp 206 is heated.
The printing paper 62 heated by the heating means 2 is conveyed while being electrostatically adhered to the contact surface of the heating means 2 by the electrostatic separation, and the heat of the heated conveyance belt 203 dries the ink image I on the printing paper 62. Further promoted. As a result, the ink image I can be dried reliably and quickly,
The occurrence of set-off can be further reduced.

Furthermore, since the heat lamp 206 heats the contact surface side of the conveyor belt 203 with the printing paper 62, it is more efficient than heating from the inside of the conveyor belt 203 (the surface not in contact with the printing paper). 203 can be heated, the printing paper 62 can be sufficiently heated, and the printing paper 62
The result is that the upper ink image I can be efficiently dried.

Since the heat lamp 206 provided below the conveyor belt 203 heats the conveyor belt 203 to heat the printing paper 62 to be conveyed, as shown in the conventional example, a heating roller is arranged on the conveyor belt 203. Then printing paper 6
As compared with the case where 2 is heated, it is possible to prevent the ink image I on the printing paper 62 from adhering to the heating member, and it is not necessary to significantly change the device configuration above the transport belt 203.

In the present embodiment, the heat lamp 206 is provided below the medium-resistance conveyor belt 203, but the heat lamp 206 may be provided below the conveyor belt 116 shown in FIG. In this case, needless to say, the ink image I on the printed printing paper 62 can be dried without heating the press roller 103 by the heating means 2.

Further, it goes without saying that this embodiment may be applied to a stencil printing machine having a conventional press roller not having the heating element 3 and an impression cylinder 117. In this way, the transport means 2
By providing the heat lamp 206 at 00, the heating portion is separated from the printing portion A as compared with the case where the heating element 3 is provided at the press roller 103 or the impression cylinder 117, and the fluidity of the printing ink due to the heating in the printing portion A is increased. Can be prevented from increasing.
Therefore, the printing paper 62 is printed with an appropriate amount of ink, and the drying time of the ink image I is increased due to ink unevenness or excess ink, or the defective separation between the printing drum 101 and the printing paper 62 due to excess ink is reduced. Connected to
The stencil printing machine has less set-off and poor conveyance.

(Fifth Embodiment) This embodiment shows a stencil printing machine 400 for printing and carrying on a printing paper 62 without using the press roller 103 and the impression cylinder 117. At first,
A configuration and a series of operations of the stencil printing apparatus 400 of plate making and printing type will be described. A stencil printing machine denoted by reference numeral 400 in FIG. 10 includes a main body cabinet 250, a paper feeding / discharging unit 260, a plate discharging unit 270, a reading unit 280, a plate making / plate feeding unit 290, a drum unit (image forming unit) 300, and a conveying unit 220. I have it.

In the stencil printing machine 400, when the original 263 is set on the original receiving stand 280a provided on the upper part of the main body cabinet 250 and a plate making start key (not shown) is turned on, the printing drum (plate cylinder) 301 of the drum unit 300 is turned on.
Rotates in the direction of arrow D. Print drum 301 in this direction
When is rotated, the used master 261 ′ mounted on the outer peripheral surface of the printing drum 301 is configured by the peeling rollers 271a and 271b, the belts 272a and 272b, and the rollers 273a and 273b of the plate discharging unit 270 arranged in the rotation direction. In the plate discharge peeling and conveying section, the plate is separated from the drum 301 and delivered and discharged into the plate discharge box 274. Then, the used master 261 ′ is compressed inside the plate discharge box 274 by the compression plate 275 that is vertically movable above the plate discharge box 274.

In the reading section 280, the separation roller 28
1. The pair of front original conveying rollers 282a and 282b and the pair of rear original conveying rollers 283a and 83b are rotationally driven by a driving unit (not shown), and the original 263 set on the original receiving table 280a is exposed on the contact glass 285 for exposure reading. Are being transported to.

For exposure reading, the pair of front original conveying rollers 28 is used.
2a and 282b and a pair of rear document conveying rollers 283a and 283
While the document 263 is conveyed on the contact glass 285 disposed between the contact glass 285 and b, the reflected light from the surface of the document 263 exposed by the fluorescent lamp 286 provided below the contact glass 285 passes through the mirror 287 and the lens 288. It is incident on an image sensor 289 such as a CCD. The reflected light is photoelectrically converted by the image sensor 289 and is input as an electric signal to the A / D converter 234 shown in FIG. 11 provided in the main body cabinet 250. A / D converter 2
The reflected light input to 34 is subjected to analog / digital conversion, and then stored in the memory 239 as image data via the CCD image processing unit 235 and the main controller 237 including a CPU constituting the control unit 230. Instead of storing the image data in the memory 239, the image data may be directly transferred to the thermal head 291 described later via the thermal head image processing unit 236 connected to the main controller 237.

On the other hand, in the plate making / plate feeding unit 290, in parallel with the image reading operation, a pair of feed rollers 294a and 294b driven by a drive motor (not shown) and a platen roller 292 are wound in a roll shape and are not perforated. The master 261 is unwound from the roll state and conveyed. The master 261 has a laminated structure in which a very thin thermoplastic resin film of polyester or the like and a porous support made by mixing Japanese paper and synthetic fibers are bonded together. The master 261 includes a platen roller 292 and the roller 2
It is sandwiched between the thermal head 291 and the thermal head 291, which are arranged opposite to each other, and the A / D converter 234, each image processing unit 235,
A plurality of heating elements arranged in a line on the thermal head 291 that selectively generates heat in accordance with a digital image signal sent after being subjected to various kinds of processing by the control unit 236 and the control device 230 is melted and perforated. Plate-making.

After the completion of the plate discharge operation of the used master 261 ', the leading end of the master 261 made by plate making is conveyed to the drum part 300 side through the feed roller pair 294a, 294b, and in the direction of arrow C by a drive motor (not shown). It is sent to the master clamper 302 provided on a part of the outer peripheral surface of the printing drum 301 which is rotationally driven. The master clamper 302 clamps the leading end of the master 261 at a fixed timing, and is openable and closable with respect to the outer peripheral surface of the printing drum 301. When the clamper 302 is closed and the leading end of the master 261 is clamped, the print drum 3
01 is rotationally driven in the direction of arrow C, and the master 261 is gradually wound around the outer peripheral surface of the printing drum 301.

A cutter 295 is arranged between the pair of feed rollers 294a, 294b and the platen roller 292. The master 261 for which plate making has been completed is cut into a certain length by this cutter 295, and one master 2 is cut.
It becomes 61 and is completely wound around the outer peripheral surface of the printing drum 301. With this operation, in the stencil printing apparatus 400,
Plate supply is said to have ended.

The paper feeding / discharging unit 260 is provided with the printing paper 2 stacked on the paper feeding table 251 arranged on the right side of the printing drum 301.
The paper 62 is fed toward the print drum 301, and the print paper 2 that has finished printing is output to the paper discharge tray 252 arranged on the left side of the print drum 301 that faces the paper feed tray 251.
62 is discharged. The paper feeding / discharging unit 260 uses the paper feed roller 310 and the separation roller pairs 311a and 311b arranged on the front end 262a side of the printing paper 262 to set the uppermost one of the stacked printing papers 262 to the registration roller pair. 312
a, 312b to be delivered. Registration roller 312
a and 312b are designed to be driven to rotate at a predetermined timing synchronized with the rotation of the print drum 301, and the print sheet 262 to be conveyed is disposed so as to face the print drum 301, and is brought into contact with and separated from the print drum 301. The print transport belt 223 and the print drum 30 of the transport means 220 supported freely.
It is designed to be delivered to the printing unit A located between the printer 1 and the printer 1.

The print drum 301 is provided with a large number of openings (not shown) for allowing ink to pass through the so-called image area except for both side edges thereof, the clamper 302 and its periphery. Inside the print drum 301, the print drum 3
An ink roller 304 that contacts the inner peripheral surface of 01 and rotates;
A doctor roller 306 that forms an ink reservoir 305 between the ink roller 304 and the ink roller 304 and that is slightly spaced apart from the ink roller 304, and an ink supply pipe 307 that supplies printing ink to the ink reservoir 305 are disposed. An appropriate amount of printing ink is supplied to the inner peripheral surface of the drum.

Therefore, when the printing paper 262 is pressed against the master 261 by the printing conveyance belt 223, the printing ink oozes out from the punching portion of the master 261 and is transferred onto the printing paper 262, and corresponds to the punched image of the master 261. The ink image is printed.

The transport means 220 is a print transport belt 2 which is wound around a driving roller 221A and a driven roller 221B.
23 (hereinafter referred to as “belt 223”), a conveyance bias roller 224 that applies a bias to the belt 223 (hereinafter referred to as “bias roller 224”), a bias roller 2
A high voltage power supply 225 and a heating means 226 are provided as a bias supply means to the 24. The belt 223 has an electric resistance value of 1 as described in JP-A-53-96838.
It is composed of a medium resistance conveyance belt of 0 ⁸ to 10 ¹¹ Ω · cm, and is charged when a bias is supplied from the bias roller 224, and the conveyed printing paper 262 is electrostatically transferred to the upper surface side of the belt 223. It is designed to adsorb.

The high-voltage power supply 225 is connected to the main controller 237 shown in FIG. 11, and supplies a bias current to the bias roller 224 at the timing of feeding the printing paper 262 judged by the main controller 237. ing. The bias supplied to the bias roller 224 is applied by the main controller 237 by a constant current method in which the current is constant in the high voltage power supply 225.

The drive roller 221A is adapted to rotate in synchronization with the drum 301 via a drive transmission mechanism (not shown). In this embodiment, it is driven to rotate counterclockwise. The drive roller 221A and the driven roller 221B are made of a conductive member and are grounded together with the high voltage power supply 225. As shown in FIG. 12, the driven roller 221B is rotatably supported by a contact / separation movable plate 229 which is swingably supported about a drive shaft 221a of the drive roller 221A. The contact / separation movable plate 229 is provided with a bias roller 224 and a heat lamp 227 forming a heating unit 226 so as to be movable integrally with the movable plate 229. Below the drive roller 221A, the belt 223 is provided.
The cleaning blade 327 coming into contact with the frame 22
It is fixed and arranged at 2.

The conveying means 220 is provided with a releasing lever 230 as a releasing means and a belt contacting / separating means 320. The belt contacting / separating means 320 is the main controller 2
The arm member 3 in contact with the contact / separation cam 321, the contact / separation lever 322, and the contact / separation movable plate 229 which are under the control of 37.
23. These belt contacting / separating means 320
Is provided on the frame plate 222 of the conveying means 220 supported swingably around the drive shaft 221a, and is rotatable integrally with the frame plate 222. A hook portion 222 a extending in the width direction (paper surface direction) of the belt 223 is formed on the lower portion of the frame plate 222.

The contact / separation lever 322 is rotatably supported at its base end 322b by a fixed shaft 324 provided on the frame plate 222. Free end 322 of contact / separation lever 322
A contact / separation cam 321 is in contact with a. Arm member 3
Reference numeral 23 denotes a base end 323a side of which is rotatably supported by a fixed shaft 324, and the other end side 323b of which is attached / detached to the lever 322.
Is pulled by a tension coil spring 325 provided on the. The rotation range of the arm member 323 is the contact / separation lever 3
22 prevents it from swinging beyond a certain angle. Further, the free end 322a is biased by a spring (not shown) in such a direction as to come into contact with the contact / separation cam 321.

The contact / separation cam 321 is a shaft 3 which is half-rotated by a drive unit (not shown) at the time of feeding and at the end of printing.
26. The contact / separation cam 321 is normally shown in FIG.
When the free end 322a of the contact / separation lever 322 shown in FIG. 2 is pushed downward to bring the belt 223 and the print drum 301 into a non-contact state, and the shaft 326 makes a half rotation at the paper feed timing, the belt 223 is moved to the outer periphery of the print drum 301. It has a cam profile that presses against the surface. The end of printing here means the time when the printing paper 262 being printed has passed through the printing unit A, and this timing is one of the information input from the various sensors 241 to the main controller 237. It is calculated from the size signal and the paper feed timing.

On the upper end 230a of the release lever 230, a pin 231 that engages with the hook 222a is provided in a protruding manner. The lower end 230b of the release lever 230 has a screw shaft 232a of a handle 232 screwed into a fixing portion of a device (not shown).
It is rotatably supported by the handle 232 and is fixed when the handle 232 is tightened.

The heating means 226, as shown in FIG.
A heat lamp 227 serving as a heat source and a power supply 228 thereof are provided. The heat lamp 227 is connected to a power source 228 placed under the control of the main controller 237, and the printing paper 2 calculated by the main controller 237.
At the paper feed timing 62, heat is generated by receiving a current from the power supply 228. This heat lamp 2
Reference numeral 27 denotes a belt that is arranged below the driven roller 221B of the transporting unit 220 and is separated from the printing paper 262 and returns downward and moves in the direction of arrow E, that is, a belt 223 that is conveyed back, to the printing paper 262. The contact surface side (front surface side) is heated.

The main controller 237 is provided with a ROM 238 and a RAM 239 shown in FIG. 11, and an operation unit 24 provided with a plate-making start key and a print start key (not shown).
2. Various sensors 241 arranged in the apparatus, various loads 2
40, a high-voltage power supply 225, and a power supply 228 are connected.

The operation of the transport means 220 having such a configuration will be described. When a paper feed timing signal is issued from the main controller 237 shown in FIG. 11, the high voltage power supply 225 and the power supply 228 energize the bias roller 224 and the heat lamp 227 to charge the belt 223 and heat the heat lamp 227. . Further, the shaft 326 shown in FIG. 12 is half rotated, and the contact / separation cam 321 is rotationally moved from the separated position shown in FIG. 12 to the contact position shown in FIG.

When the contacting / separating cam 321 rotates, the free end 322a of the contacting / separating lever 322 swings upward around the fixed shaft 324, and the arm connected to this lever 322 via the tension coil spring 325. The member 323 is also swung in the same direction about the fixed shaft 324. Then, the contact / separation movable plate 229, which is in contact with the other end 323b of the arm member 323, moves upward around the drive shaft 221a. By the movement of the contact / separation movable plate 229, the charged and heated belt 223 comes into contact with the outer peripheral surface of the printing drum 301 to form a nip, and becomes the printing unit A. In this state, when the timed printing paper 262 reaches the printing unit A by the registration roller pairs 312a and 312b, printing is performed in the printing unit A.

The printing paper 262 which has been printed is printed by the printing unit A.
When passing through the sheet and contacting the belt 223, the printing paper 262 is
Is electrostatically polarized, and water in the printing ink is also electrostatically polarized, and the electrostatic separation action causes the belt 223 to print on the printing paper 26.
2 is electrostatically adsorbed. At this time, the printing paper 262, which has finished printing, has its own stiffness, curvature separation from the printing drum 301, and the like.
It is separated smoothly from the outer peripheral surface.

On the printed printing paper 262, unless the printing area is a solid image covering the entire surface of the printing paper 262, the printing paper 262 has a leading edge 262a or a trailing edge 262b, or a binding margin or an ink image as shown in FIG. Since the blank space S exists between I, the blank space S is charged by the belt 223. Therefore, the printing paper 2 that has passed the printing unit A
62 is the print drum 301 from the front end 262a thereof.
And is attracted to the belt 223.
The separated printing paper 262 is electrostatically and firmly adsorbed by the belt 223, and the paper ejection tray 5 shown in FIG.
It is discharged to 2.

The printing paper 262 that has passed through the printing section A is
Since heat is applied from the belt 223 heated by the heat lamp 227, the ink image I printed on the printing paper 262 is dried while being conveyed, and settling is prevented. Since the driving roller 221A and the driven roller 221B are grounded, the charged conveyance belt 223 and the printing paper 262 approach the driving roller 221A side, and
That is, the charge is removed as the printing paper 262 is conveyed.

Therefore, the belt 223 and the printing paper 262 are separated from each other by the rigidity of the printing paper 262 and the drive roller 221A.
The belt 223 is curved in the vicinity to smoothly perform the operation. Further, in the printing unit A where the belt 223 and the printing drum 301 are in contact with each other, the printing ink supplied from the inside of the printing drum 301 may adhere to the belt 223. However, the printing ink adhered to the belt 223 is dried by the heat of the belt 223, and the belt 223 is dried.
The cleaning blade 327 that comes into contact therewith is scraped off to prevent the backside of the printing paper 262 from being soiled.

On the other hand, when the print end signal is issued from the main controller 237, the shaft 326 makes a half rotation, and the operation opposite to the operation of bringing the belt 223 and the print drum 301 into contact with each other is performed. The outer peripheral surface and the belt 223 are separated from each other as shown in FIG.

Here, it is assumed that the printing paper 262 is jammed in the printing section A during printing. In this case, the handle 232 fixing the release lever 230 is loosened to release the release lever 230.
14 is rotated counterclockwise as shown in FIG.
Then, the engagement between the hook portion 222a and the pin 231 is released, so that the frame 222 is rotated downward about the drive shaft 221a. Therefore, the proximity state between the belt 223 and the printing drum 301 is released, a space is formed between the belt 223 and the printing drum 301, and the jammed printing paper 262 can be easily removed. Further, since the belt 223 is separated from the printing drum 301, the printing paper 2
62 can be peeled off from the printing drum 301,
Printing drum 301 and belt 2 due to rubbing of ink image I
23 can be prevented from becoming dirty.

In this way, the printing paper 262 heated by the heat lamp 227 is electrostatically and reliably attracted to the belt 223 and conveyed, so that the printing paper 262 is sucked by an air nozzle or a suction fan as in the conventional case. Printing drum 301
Of the printing paper 262 while reducing the noise generated by the device, as compared with those that are separated from the paper or adsorbed on the belt 223.
The ink image I on the sheet can be dried, resulting in a stencil printing machine with low noise and extremely little set-off. Further, since the jammed printing paper 262 can be removed easily without polluting the surroundings, the stencil printing machine has good workability. In the present embodiment, the heating means 226 is provided, and it is preferable to provide the heating means 226 to dry the ink image I. However, when noise countermeasures are mainly taken, the device configuration may be omitted.

[0070]

According to the first aspect of the invention, when the printing paper is conveyed, the current supplied from the current supply source constituting the heating means to the main body side electrode is applied to the outer peripheral surface of the press roller or the impression cylinder. The press roller or impression cylinder is heated by energizing the independent electrodes of the multiple heating elements that are embedded independently and in contact with the main body side electrode, so that the ink on the printing paper can be dried and set-off occurs. It is possible to provide a stencil printing device having less number of prints. According to the second and third aspects of the present invention, when the printed printing paper passes through the printing unit, the heating unit is controlled by the control unit, and the press roller or the impression cylinder which is arranged to face the printing drum and constitutes the printing unit. Is heated, the heat is applied to the printing paper after passing through the printing unit. Therefore, the ink on the printing paper can be dried, the viscosity change of the printing ink in the printing drum due to heat can be suppressed, and a stable ink supply can be achieved. Therefore, it is possible to provide a stencil printing machine with less set-off. According to the fourth aspect of the invention, when the bias from the high-voltage power supply is supplied from the transport bias roller to the medium resistance transport belt, the electrostatic separation that occurs when the printing paper heated by the heating means contacts the belt. Since it is electrostatically adsorbed to the medium resistance conveyance belt and conveyed, it is possible to perform stable sheet conveyance without using a conventional suction fan or air nozzle, and to provide a stencil printing machine with low noise and less set-off. be able to. According to the fifth aspect of the present invention, the medium-resistance transport belt is heated, and the printing paper that is electrostatically adsorbed to and transported by the medium-resistance transport belt by the electrostatic separation action is heated by the belt. It is possible to provide a stencil printing machine that can perform stable paper conveyance without using a suction fan or an air nozzle, can further accelerate the drying of ink on printing paper, and have low noise and less set-off. According to the sixth aspect of the present invention, when the bias from the high voltage power source is supplied from the transport bias roller to the medium resistance transport belt, the electrostatic separation that occurs when the printing paper heated by the heating means contacts the belt. By the action, it is electrostatically attracted to the medium resistance conveyor belt and conveyed,
It is possible to provide a stencil printing machine capable of stable sheet conveyance without using a conventional suction fan or air nozzle, and having low noise and less set-off. In particular, since the medium resistance conveyor belt is heated by the heating means when the printed printing paper is conveyed,
Heat can be applied to the printing paper that has passed through the printing unit to dry the ink on the printing paper. Therefore, it is possible to provide a stencil printing apparatus capable of further preventing set-off and stable delivery of printing paper. According to the invention described in claim 7, by disposing the heating means below the conveying means, it is not necessary to change the layout of the constituent parts of the stencil printing apparatus located above the conveying means, so that the cost is low. so,
It is possible to provide a stencil printing apparatus that prevents set-off and enables quiet and stable delivery of printing paper. According to the invention as set forth in claim 8, the medium-resistance transport belt is supported so as to be capable of contacting and separating from the printing drum, and the printing paper is composed of the printing drum and the medium-resistance transport belt by the contact operation of the medium-resistance transport belt. Since the printing is performed by the printing unit, the press roller is not necessary in addition to the effect corresponding to the invention of claim 6 or 7, and the number of parts is reduced.

According to the invention described in claim 9, when the releasing means is operated, the proximity state between the medium resistance conveyor belt and the printing drum is forcibly released. Therefore, the effect on the invention according to claim 5 or 8 is obtained. In addition, it is possible to easily remove the printing paper jammed between the medium resistance conveyance belt and the printing drum, and it is possible to provide a stencil printing apparatus with good workability.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a stencil printing machine showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of control means of the first embodiment.

FIG. 3 is an exploded perspective view showing the configuration of the heating means of the first embodiment.

FIG. 4 is an enlarged side view showing the operation of the heating means of the first embodiment.

FIG. 5 is a perspective view of heating means of a stencil printing machine showing a second embodiment of the present invention.

FIG. 6 is a side view showing the operation of the heating means of the second embodiment.

FIG. 7 is a schematic side view of the transporting means of the stencil printing machine showing the third embodiment of the present invention.

FIG. 8 is a plan view showing an ink image and a blank portion of printing paper.

FIG. 9 is a side view of a schematic configuration of a conveying unit and a heating unit of a stencil printing apparatus showing a fourth embodiment of the present invention.

FIG. 10 is a schematic configuration diagram of a stencil printing machine showing a fifth embodiment of the present invention.

FIG. 11 is a block diagram showing a configuration of control means of a fifth embodiment.

FIG. 12 is a schematic configuration side view of a conveying means and a releasing means in a fifth embodiment.

FIG. 13 is a side view showing the operation of the carrying means and heating means of the fifth embodiment.

FIG. 14 is a side view showing the operation of the releasing means of the fifth embodiment.

[Explanation of symbols]

 1,400 Stencil printing machine 2,206,226 Heating means 3 Heating element 4,5 Main body side electrode 6 Current supply source 7 Press roller shafts 7a, 7b Shaft end portions (both ends) 11a, 12a Heating element electrode 30 Control means 61,261 master 62,262 printing paper 101,301 printing drum 103 press roller 117 impression cylinder 118 impression cylinder shafts 118a, 118b shaft end portions (both ends) 107,200,220 conveying means 201,202 plural rollers 203,223 Medium resistance transport belt 221A, 221B Multiple rollers 204, 224 Transport bias roller 225 High-voltage power supply 226 Heating means 230 Release means A Printing section B Paper unloading direction

Claims (9)

[Claims] 1. A stencil printing apparatus for performing stencil printing by winding a perforated master on an outer peripheral surface of a printing drum, the press roller or an impression cylinder rotating in contact with the outer peripheral surface of the printing drum. , A plurality of heating elements embedded independently of each other in parallel with the axis of the press roller or the impression cylinder and having independent electrodes formed on each, and the electrodes of the plurality of heating elements are rotated by the press roller or the impression cylinder. A stencil printing apparatus comprising: heating means having a body-side electrode that individually contacts and a current supply source that supplies a current to the body-side electrode when the printing sheet is conveyed by the stencil printing apparatus. 2. The current supply source, when the printing paper after printing is conveyed, or when a printing unit formed between the printing drum and the press roller or between the printing drum and the impression cylinder is 2. A control means for supplying a current to the main body side electrode after passing through the main body side electrode.
The stencil printing machine described. 3. The electrodes of the plurality of heating elements are arranged at the end of the shaft of the press roller or impression cylinder, and the main body side electrode is placed between the printing drum and the press roller or between the printing drum and the impression cylinder. The stencil printing machine according to claim 1 or 2, wherein the stencil printing machine is arranged at a portion which comes into contact with the electrode of the heating element on the side of the paper discharge direction with respect to the formed printing portion. 4. A transporting means for transporting a print sheet, which has been printed, by a bias from a high-voltage power supply supplied from inside by a transport bias roller, and a medium resistance transport belt wound between a plurality of rollers. Claims 1 and 2
Or the stencil printing machine according to the item 3. 5. The stencil printing apparatus according to claim 4, further comprising a belt heating unit that heats the medium-resistance transport belt when the printed printing paper is transported. 6. A stencil printing apparatus for stencil printing by winding a perforated master around an outer peripheral surface of a printing drum, and is rotatably driven by being wound between a plurality of rollers, and is internally driven by a high voltage power source. And a heating unit that heats the medium-resistance transport belt when printing the finished printing paper by using a medium-resistance transport belt whose bias is supplied by a transport bias roller. Stencil printer. 7. The stencil printing apparatus according to claim 6, wherein the heating means is arranged below the conveying means. 8. One of the plurality of rollers is swingably supported with the other side of the plurality of rollers as a fulcrum,
The stencil printing machine according to claim 6 or 7, wherein the medium resistance conveyor belt is supported so as to be able to come into contact with and separate from the printing drum. 9. The stencil printing apparatus according to claim 5, further comprising a releasing means for releasing the proximity state of the medium resistance conveyance belt and the printing drum.