JP3234037B2 - Stencil printing machine - Google Patents

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,
In particular, it relates to a press-type stencil printing apparatus.

[0002]

2. Description of the Related Art As a press type stencil printing apparatus, a base has a press plate having one end hinged, and a base is provided with an elastic printing paper mounting table such as a sponge. A type in which a stencil sheet mounting portion is provided on the side facing the printing paper mounting table is well known, and a stencil printing apparatus of this type is disclosed in, for example, Japanese Utility Model Laid-Open No. 62-196567. I have.

The press-type stencil printing apparatus as described above performs stencil printing by pressing a stencil sheet mounted on the pressing plate against a printing sheet on a printing sheet mounting table by a pressing and rotating operation of the pressing plate by hand. .

[0004] As a printing apparatus for applying a pattern to a cloth by laying a pattern screen thereon and dyeing the pattern, the apparatus has a perforated support or mesh plate provided with a large number of suction holes, and is provided on the perforated support or mesh plate. A cloth is placed on the cloth, a pattern screen is placed on the cloth, and air is sucked from suction holes of the perforated support or a mesh of the screen, so that the pattern of the pattern screen is passed through the cloth on the perforated support or the screen. 2. Description of the Related Art There is known a suction-type printing apparatus in which a suction effect is exerted on a cloth-side surface, and the dyeing on a paper pattern screen is sucked into a cloth through an opening of the paper pattern screen by the suction action to perform printing. This suction-type printing apparatus is described in, for example,
-3944, JP-B-38-5199, JP-B-44-
No. 13,797 (US Pat. No. 3,221,648).

[0005]

In order to perform stencil printing at a predetermined density in a press-type stencil printing apparatus, a predetermined printing pressing force is required, and the larger the printing surface, the greater the pressing force.

On the other hand, in the stencil printing apparatus as described above, the printing pressing force for pressing the stencil sheet against the printing paper on the printing paper mounting table can be obtained by manually pressing and rotating the pressing plate. Is naturally limited.

In order to perform stencil printing with a uniform density,
It is necessary that the printing pressing force acts uniformly on the entire printing surface. However, in the stencil printing apparatus as described above, the pressing plate is of a rotary type, and the pressing operation force of pressing down the pressing plate is directly applied. By acting on the printing surface as a printing pressure,
The printing pressure acting on the printing surface tends to be non-uniform, and it is difficult to obtain a stencil image with excellent print density uniformity. This becomes more remarkable as the printing surface becomes larger, and a stencil image having a uniform density cannot be obtained, and practical stencil printing cannot be performed.

For these reasons, in the stencil printing apparatus as described above, the practical stencil printing paper size is at most about B5 to A4 size.

In the above-described stencil printing apparatus,
Since the pressing force acts in the penetrating direction on the printing ink layer applied to the stencil paper, the pressing force acts on the printing ink for the stencil printing even if the printing ink is applied only to a part of the stencil paper. Each time the printing ink layer expands and expands, the amount of wasted printing ink increases. This is known as
In the case where multicolor printing is performed using a stencil sheet on which printing inks of each color having a hardness capable of self-holding the shape as disclosed in JP 3601 are placed as ink masses, this case is wasteful. In addition to an increase in the amount of printing ink, if the number of prints is large, the printing ink of each color will be mixed due to the expansion and expansion of the printing ink mass of each color, and multicolor printing with appropriate color classification will not be performed.

[0010] The above-mentioned suction-type printing apparatus exerts a suction effect on the surface of the pattern screen on the side of the printing material through a member corresponding to the printing material (fabric), so that the printing material has air permeability like cloth. And cannot be diverted to a stencil printing apparatus for printing on ordinary printing paper or the like. In addition, the suction-type printing apparatus as described above applies the suction force from the suction holes of the perforated support or the mesh of the mesh plate directly to the surface of the pattern screen on the printing material side through the printing material, and the movement of the suction force is controlled. Since the dye on the paper pattern screen is sucked into the printing material through the opening of the paper pattern screen by pressure action, the paper pattern screen has an intensity distribution according to the suction hole pattern of the perforated support or the mesh pattern of the mesh plate. The suction force acts, and the suction force does not uniformly act on the entire surface of the pattern screen. For this reason, even if the printing paper has some air permeability, a printed image having a uniform density cannot be obtained unlike fabric.

When the stencil sheet is separated from the printing paper on the printing paper mounting table when printing is completed, the printing on the printing paper mounting table is performed so that the printing paper remains on the printing paper mounting table against the viscosity of the printing ink. It has been conventional to provide an adhesive layer for holding the printing paper on the paper mounting surface.However, if the printing surface is large, the size of the printing paper also increases, and the printing paper resists the viscosity of the printing ink. It is also difficult to separate the printing paper from the stencil sheet so that the printing paper remains on the printing paper mounting table. If the adhesion holding force of the printing paper by the adhesive layer is increased so that this is surely performed, it becomes difficult to peel the printing paper adhesively held by the adhesive layer from the adhesive layer without being damaged.

The present invention has been made in view of the above-mentioned problems in the conventional press-type stencil printing apparatus. Even if the printing surface is large, stencil printing with a predetermined density and uniform density can be easily and simply performed. It can be done quickly and multi-color printing can be performed with proper color classification even if the number of prints is large,
In addition, it is an object of the present invention to provide a stencil printing apparatus that can hold and remove printing paper on a printing paper mounting table in a satisfactory manner.

[0013]

SUMMARY OF THE INVENTION According to the present invention, there is provided a box having a pressure chamber formed inside a diaphragm having at least one of a flexible wall and an elastic wall. A pressure reducing means for reducing the pressure in the pressure chamber; and a plurality of air suction holes provided in the pressure chamber and opposed to the diaphragm in the printing paper mounting surface, and a negative pressure is applied to the air suction holes. Thus, the present invention is achieved by a stencil printing apparatus having a suction-type printing paper mounting table for adsorbing printing paper on the printing paper mounting surface.

In this stencil printing apparatus, the pressure reducing means may also serve as a negative pressure source for supplying a negative pressure to the air suction holes of the suction type printing paper mounting table.

The stencil printing apparatus according to the present invention has a stencil sheet supporting means for supporting the stencil sheet between the diaphragm and the printing sheet mounting table in the pressure chamber, in addition to the above-described structure. The stencil sheet supporting means may be urged by a resilient means in a direction away from the printing paper mounting surface.

[0016]

According to the above arrangement, the negative pressure is selectively applied to the air suction holes, whereby the printing paper on the printing paper mounting surface is attracted to the printing paper mounting surface, and the suction-type printing paper mounting table is provided. To be fixed selectively.

Therefore, in printing, first, a negative pressure is applied to the air suction holes to cause the printing paper on the printing paper mounting surface to be attracted to the printing paper mounting surface and fixed to the suction-type printing paper mounting table. Is placed as a mass of ink on the stencil paper, and the pressure chamber is depressurized by the decompression means. As a result, a differential pressure acts on both sides of the diaphragm in a substantially stationary fluid atmosphere in a static pressure manner, so that the diaphragm wraps the ink mass on the ink mass on the stencil sheet according to the surface shape of the ink mass. The stencil paper is pressed by the diaphragm and closely adheres to the printing paper on the printing paper mounting surface, and in this state the ink mass on the stencil paper is caused by the differential pressure that acts uniformly on the entire surface of the printing paper. Stencil printing is performed on the printing surface of the printing paper by uniformly pressing the printing paper according to Pascal's law in a fluid pressure manner.

Thereafter, only the pressure chamber is returned to the atmospheric pressure while maintaining the state in which the printing paper is sucked and held by the negative pressure on the printing paper mounting surface, whereby the printing paper is placed on the printing paper mounting surface by the negative pressure. The stencil sheet and the printing paper are peeled off in a state where the stencil sheet is absorbed and absorbed. By returning the air suction hole to the atmospheric pressure after the stencil sheet is separated, the suction holding of the printing paper on the printing paper mounting surface is released.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an embodiment of the present invention.

FIGS. 1 and 2 show the basic configuration of a stencil printing apparatus according to the present invention. This stencil printing apparatus has a box body 7 having a box body 1 having an upper opening and a lid member 5 connected to the box body 1 by a hinge 3 so as to be openable and closable.

In the box main body 1, a printing paper mounting table 9 is fixedly arranged. The printing paper mounting table 9 has a suction chamber 11 inside.
And has a large number of air suction holes 15 in the upper surface portion 13. Upper surface 1 of printing paper mounting table 9
3 is a breathable elastic sheet 1 made of an open-cell sponge or the like.
In this embodiment, the upper surface of the breathable elastic sheet 17 is a substantial printing paper mounting surface 19.

The lid member 5 overlaps the box body 1 to close the upper opening of the box body 1 as shown by a solid line in FIG. 1, and a phantom line as shown in FIG. ,
It is pivotally displaced upward from the box main body 1 and is rotatable between an open position where the upper opening of the box main body 1 is opened.

The cover member 5 has a large opening at the surface facing the printing paper mounting surface 19 at the closed position, and a diaphragm 21 is stretched over the cover member 5 to close the opening. The diaphragm 21 is formed of a flexible or elastic flexible thin film such as soft vinyl chloride or rubber, and faces the printing paper mounting surface 19 at a predetermined interval.

Thus, the box 7 has a pressure chamber 23 in which a part of the wall is formed by the diaphragm 21 inside the lid member 5 in the closed position. The box body 1 is provided with a manifold tube 25. The manifold pipe 25 is connected to one of the collecting ports 27 with a suction pump 31 driven by a motor 29,
The other branch port 33 is connected to the suction chamber 11 of the printing paper mounting table 9 in communication, and the other branch port 35 is opened to the pressure chamber 23. Branch ports 33 and 3
5 are selectively opened and closed individually by electromagnetic on-off valves 37 and 39, respectively.

The operation of the motor 29 and the electromagnetic on / off valves 37 and 39 is controlled by a control device 41. The control device 41 operates the print start key 45 provided on the operation panel 43 to first activate the electromagnetic on / off valve 37. Open the solenoid valve 3
The motor 29 is driven in a state where the valve 9 is closed, and the electromagnetic opening / closing valve 39 is opened after a lapse of a predetermined time from the start of driving of the motor 29. To stop the driving of the motor 29,
When a predetermined time has elapsed from this, control is performed to open the electromagnetic on-off valve 37.

When stencil printing is performed using the stencil printing apparatus having the above-described configuration, a printing ink having a hardness capable of self-holding the shape is scattered and placed at required positions on the stencil sheet S as an ink mass B, With the cover member 5 opened, the stencil sheet S is placed on the printing paper P on the printing paper loading surface 19,
Further, the ink cover sheet C is put on the stencil sheet S so that the printing ink on the stencil sheet S does not adhere to the diaphragm 21.

The printing ink used here is ink mass B
It is necessary to stably maintain the shape of the ink mass B on the stencil sheet S, and this printing ink is
As disclosed in JP-A-23601, an emulsion type printing ink having a hardness of 1 minute or less by a spread meter of 32 or less and having a hardness capable of self-holding a shape is preferable, and further has a thixotropic property. Good.

The stencil sheet S is composed of a thermosensitive stencil sheet made of a polymer of a non-ink-permeable thermoplastic plastic film and a sheet-like porous support made of Japanese paper, woven cloth or the like which allows ink to pass freely. A perforated portion corresponding to a thermoplastic film print image is perforated, and a printing ink is applied to the side of the porous support by an ink mass B.
Will be placed as

When the preparation as described above is completed, the lid member 5 is closed. As a result, the stencil sheet S is in the pressure chamber 23 and faces the diaphragm 19 with the ink mass placement surface side as the diaphragm 19 side.

Next, the electromagnetic pump 37 is opened to open the branch port 33, the electromagnetic valve 39 is closed, and the branch port 35 is closed.
1 is operated to suck, and first, the air in the suction chamber 11 is sucked to apply a negative pressure to the air suction hole 15. Thereby, a suction force acts on the back surface of the printing paper P on the printing paper mounting surface 19 through the breathable elastic sheet 17, and the printing paper P is attracted to the printing paper mounting surface 19 by the suction force, and It is fixed on the table 9.

Next, the electromagnetic opening / closing valve 37 is opened to open the branch port 35, and the air in the pressure chamber 23 is sucked from the branch port 35 to reduce the pressure in the pressure chamber 23. The pressure chamber 23 is a substantially closed space formed by the diaphragm 21. Due to the reduced pressure in the pressure chamber 23, a differential pressure acts on both sides of the diaphragm 21 in a substantially static fluid atmosphere in a static pressure manner. By diaphragm 21
As shown in FIG. 2, as shown in FIG. 2, the diaphragm 21 is drawn into the ink mass B on the stencil sheet S by following the surface shape of the ink mass B by the diaphragm 21. And the stencil sheet S is pressed by the diaphragm 21 and closely adheres to the printing paper P on the printing paper mounting surface 19. Pressure chamber 23
It is not necessary to reduce the pressure to a high degree of vacuum close to 0 mmHg, and this pressure reduction is 400 to 600 mm under standard atmospheric pressure.
It may be about Hg.

In this state, the diaphragm 21 uniformly presses the ink mass B on the stencil sheet S in a fluid pressure manner in accordance with Pascal's law by the differential pressure acting on the stencil sheet S. In other words, the pressing force is applied to the entire surface of the stencil sheet S. Acting uniformly, the pressing force transfers the printing ink of the ink mass B to the printing paper P through the perforated portion of the stencil sheet S, whereby stencil printing without density unevenness is performed on the printing paper P.

Further, since the diaphragm 21 presses the ink mass B on the stencil sheet S by the differential pressure acting thereon in accordance with Pascal's law, the entire surface of the ink mass B on the stencil sheet S on the diaphragm 21 side is pressed. Is pressed in the normal direction, and as a result, the ink mass B
Even if the pressing force is applied repeatedly, the shape of the ink mass B does not collapse, and the extension and expansion of the ink mass B are avoided.

This prevents the printing inks of the ink masses B adjacent to each other from being mixed with each other, so that even if a large number of sheets are printed on the same base paper in multicolor printing, the stencil paper S
The printing inks of the respective colors are prevented from being mixed with each other, so that multicolor printing with appropriate color classification can be performed on a large number of sheets.

In the stencil printing, the printing density is determined by the time during which the pressure chamber 23 is kept in a reduced pressure state by a substantially stationary fluid atmosphere and the reduced pressure value, and the printing density is variably set by these adjustments. The reduced pressure value in the pressure chamber 23 can be set to a required value by adjusting the suction force of the suction pump 31 and adjusting the internal pressure of the pressure chamber 23 by air bleed. The adjustment of the internal pressure of the pressure chamber 23 by air bleed reduces the reduced pressure value in the pressure chamber 23. It is advantageous to fine-tune quantitatively, in other words, fine-tune the print density.

The electromagnetic on-off valve 37 is opened to open the pressure chamber 2
When a predetermined time elapses after the pressure of the solenoid valve 3 has been reduced, the solenoid on-off valve 3
9 and the branch port 33 is closed, and the motor 29 is closed.
The suction operation of the suction pump 31 is stopped, and the pressure chamber 23 is returned to the atmospheric pressure. Thereby, the diaphragm 21
Returns to its original state due to its elasticity. In this state, the cover member 5 is opened, and the operation of peeling the stencil sheet S adhered to the printing paper P on the printing paper mounting table 9 with the printing ink from the printing paper P is performed.

At this time, a negative pressure is sealed in the suction chamber 11 by closing the electromagnetic opening / closing valve 39, and a suction force acts on the back surface of the printing paper P on the printing paper mounting surface 19 through the permeable elastic sheet 17. Since the state in which the printing paper P is attracted to the printing paper mounting surface 19 is maintained, the operation of peeling the stencil sheet S from the printing paper P is easily and reliably performed.

After removing the stencil sheet S, the electromagnetic opening / closing valve 39 is opened, the suction chamber 11 is returned to the atmospheric pressure, and the suction of the printing paper P only needs to be released. It is easily removed from the printing paper mounting surface 19.

It is to be noted that the suction state of the printing paper P on the printing paper mounting surface 19 is not sufficiently maintained until the operation of peeling the stencil sheet S from the printing paper P is completed only by sealing the negative pressure in the suction chamber 11. In this case, the air suction passages of the suction chamber 11 and the pressure chamber 23 are individually provided. After the pressure chamber 23 is returned to the atmospheric pressure, the suction pump 31 is operated until the operation of peeling the stencil sheet S from the printing paper P is completed. It is sufficient that the air suction of the suction chamber 11 by the suction operation is continued.

FIG. 3 shows another embodiment of the stencil printing apparatus according to the present invention. In FIG. 3, parts corresponding to FIGS. 1 and 2 are denoted by the same reference numerals as those given to FIGS. In this embodiment, the suction chamber 11
And the air suction of the pressure chamber 23 is performed by individual electric blowers 51 and 53, respectively.

In this case, the electric blower 51 is driven at the same time as the start of printing, and the electric blower 53 is driven a little later, and after the printing is completed, the driving of the electric blower 53 is stopped first. After the time required to complete the work of peeling from the P has passed, the electric blower 5
1 only needs to be stopped.
According to the sequence control of steps 1 and 53, the same operation and effect as in the above-described embodiment can be obtained in this embodiment.

In this embodiment, the stencil sheet S
May be a form in which the ink cover sheet C is attached to the frame F made of cardboard, plastics and the like and supported by the frame F, and the ink cover sheet C is openably and closably attached to the frame F. Are stencil paper S, frame F and ink cover sheet C
The stencil unit U is exchangeably mounted on a stencil support member 57 rotatably mounted on the box main body 1 by a hinge 55, and is positioned and arranged between the diaphragm 21 and the printing paper mounting surface 19. When the stencil sheet unit U is rotated upward around the hinge center of the hinge 55 and lifted after printing is completed, the stencil sheet S is peeled off from the printing paper P on the printing paper mounting surface 19 if the operation is performed. Good.

Incidentally, the stencil unit U is a real stencil unit 51-1.
The stencil unit may have substantially the same structure as that of the stencil unit disclosed in Japanese Patent Publication No. 32007, and if you want to know more detailed contents, please refer to that publication.

Incidentally, the base paper supporting member 57 may be connected to the lid member 5 in an interlocking manner, and may be displaced upwardly with the rotation of the lid member 5 to the open position.

FIG. 4 shows another embodiment of the stencil printing apparatus according to the present invention. In FIG. 4, the portions corresponding to FIGS. 1 to 3 are indicated by the same reference numerals as those given to FIGS. In this embodiment, a base paper supporting member 57 is suspended and supported by a guide bar 61 inside the lid member 5 so as to be vertically movable. A compression coil spring 63 is provided between the lower end of the guide bar 61 and the base paper support member 57.
The compression coil spring 63 is attached to the lid member 5.
Urges the stencil support member 57 in a direction away from the printing paper mounting surface 19 in a state where the is in the closed position.

In this embodiment, the stencil unit U is attached to the stencil support member 57,
The printing paper P is placed on the top, and the lid member 5 is closed.

Next, the electromagnetic pump 37 is opened to open the branch port 33, the electromagnetic valve 39 is closed, and the branch port 35 is closed.
1 to perform a suction operation, first suction the air in the suction chamber 11 to apply a negative pressure to the air suction holes 15, and suction the printing paper P to the printing paper mounting surface 19 by the suction force to cause the printing paper mounting table 9. Fix on top.

Next, the electromagnetic opening / closing valve 37 is opened to open the branch port 35, the air in the pressure chamber 23 is sucked from the branch port 35, and the pressure in the pressure chamber 23 is reduced. When the pressure inside the pressure chamber 23 is reduced, the diaphragm 21 firstly causes the ink mass B on the stencil sheet S to be moved to the ink mass B by the differential pressure acting on both sides of the diaphragm 21 in a substantially static fluid atmosphere in a static pressure manner. Ink mass B following the surface shape of
Then, the stencil unit U moves downward together with the stencil support member 57 toward the printing paper mounting surface 19 against the spring force of the compression coil spring 63,
The stencil sheet S comes into close contact with the printing paper P on the printing paper mounting surface 19.

In this state, the diaphragm 21 uniformly presses the ink mass B on the stencil sheet S by the differential pressure acting thereon in the same manner as in the above-described embodiment, thereby reducing the density unevenness as in the above-described embodiment. No stencil printing is performed on the printing paper P.

The electromagnetic on-off valve 37 is opened to open the pressure chamber 2
When a predetermined time elapses after the pressure of the solenoid valve 3 has been reduced, the solenoid on-off valve 3
9 and the branch port 33 is closed, and the motor 29 is closed.
The suction operation of the suction pump 31 is stopped, and the pressure chamber 23 is returned to the atmospheric pressure.

When the pressure in the pressure chamber 23 is returned to the atmospheric pressure, the diaphragm 21 returns to its original state due to its own elasticity, and the stencil unit U is lifted up together with the stencil support member 57 by the spring force of the compression coil spring 63. , The stencil sheet S of the stencil unit U is returned.
Is automatically peeled off from the printing paper P held on the printing paper mounting surface 19 by the negative pressure.

In this case, the stencil sheet unit U and the stencil sheet support member 57 are attached only by returning the pressure chamber 23 to the atmospheric pressure because the stencil sheet S and the printing sheet P are adhered to each other by the printing ink. In addition, if the spring cannot be lifted only by the spring force of the compression coil spring 63, the suction pump 31 is reversely driven and used as a pressure pump.
Pressurized air may be supplied into the pressure chamber 23 to move the stencil unit U upward together with the stencil support member 57.

After the base paper supporting member 57 returns to the original position, the electromagnetic on-off valve 39 is opened and the suction chamber 11 is returned to the atmospheric pressure, so that the suction of the printing paper P on the printing paper mounting surface 19 is released. The printing paper P is placed on the printing paper mounting surface 19.
Removed more easily.

[0054]

As can be understood from the above description, according to the stencil printing apparatus of the present invention, a printing ink having a hardness capable of maintaining its shape is placed as a mass of ink on a stencil sheet, and the pressure chamber is depressurized. As a result, a differential pressure acts on both sides of the diaphragm in a substantially stationary fluid atmosphere in a static pressure, and the diaphragm causes the diaphragm to follow the ink mass on the stencil sheet according to the surface shape of the ink mass. The stencil paper is pressed by the diaphragm and closely adheres to the printing surface while the ink mass is wrapped and adhered to the printing surface.In this state, the diaphragm acts on the ink mass on the stencil paper according to the differential pressure acting on it according to Pascal's law. Since the stencil printing is performed on the surface to be printed evenly in the normal direction by a fluid pressure method, stencil printing with a predetermined density and uniform density can be easily performed even if the printing surface is large. And quickly come to be carried out, also without collapsing shape of the ink lumps pressing force acts repeatedly in the ink mass, at most number of printed sheets multicolor printing is performed on the basis of the proper color.

Further, by selectively applying a negative pressure to the air suction hole of the printing paper mounting table, the printing paper on the printing paper mounting surface is attracted to the printing paper mounting surface, and the suction type printing paper mounting table is attached to the printing paper mounting surface. Since the printing paper is selectively fixed, it is ensured that the printing paper is held on the printing paper mounting table by controlling the supply of the negative pressure to the air suction holes, and that the printing paper is easily removed from the printing paper mounting table. Become.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a basic configuration of a stencil printing apparatus according to the present invention in a normal pressure state.

FIG. 2 is a schematic sectional view showing a basic configuration of a stencil printing apparatus according to the present invention in a decompressed state.

FIG. 3 is a schematic sectional view showing one embodiment of a stencil printing apparatus according to the present invention.

FIG. 4 is a schematic sectional view showing one embodiment of a stencil printing apparatus according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 box main body 5 lid member 7 box body 9 printing paper mounting table 11 suction chamber 15 air suction hole 17 air-permeable elastic sheet 19 printing paper mounting surface 21 diaphragm 31 suction pump 41 control device 51, 53 electric blower 57 base paper support member 61 Guide bar 63 Compression coil spring B Ink mass P Printing paper S Stencil base sheet C Ink cover sheet U Stencil base sheet unit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-215576 (JP, A) JP-A-61-68299 (JP, A) JP-A-61-53099 (JP, A) JP-A-60-1985 234878 (JP, A) JP-A-59-101389 (JP, A) JP-A-58-92589 (JP, A) JP-A-54-81904 (JP, A) JP-A-53-89503 (JP, A) JP-A-51-52413 (JP, A) JP-A-48-15171 (JP, A) JP-A-57-175747 (JP, U) JP-B-44-13797 (JP, B1) (58) (Int.Cl. ⁷ , DB name) B41L 13/02

Claims (3)

(57) [Claims] 1. A box body partially comprising a diaphragm having at least one of flexibility and elasticity and comprising a pressure chamber inside, a decompression means for decompressing the pressure chamber, and the pressure chamber A suction type in which a plurality of air suction holes are provided on the printing paper mounting surface which is disposed opposite to the diaphragm in the inside, and a negative pressure is applied to the air suction holes so that the printing paper is sucked on the printing paper mounting surface. A stencil printing device comprising a printing paper mounting table. 2. The stencil printing apparatus according to claim 1, wherein said pressure reducing means also serves as a negative pressure source for supplying a negative pressure to said air suction holes of said suction type printing paper mounting table. 3. A stencil support means for supporting a stencil paper between the diaphragm and the printing paper mounting table in the pressure chamber, wherein the stencil support means is separated from a printing paper mounting surface. The stencil printing apparatus according to claim 1, wherein the stencil printing apparatus is urged in a direction by a resilient means.