JP2860218B2 - 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, and more particularly to the prevention of ink leakage (tail leakage) from the tail end of a stencil printing paper mounted on a cylindrical printing cylinder.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a supporting cylinder 1 having a porous opening 1a and a mesh screen 2 mounted on the outer periphery thereof are provided. Cylinder A to which the base paper 3 is mounted, an ink supply device including an ink roller 5 and a doctor roller 6 for supplying ink to the inner peripheral surface of the cylinder A, and a cylindrical plate cylinder. A is provided with a press roller 10 as a pressing member that is selectively pressed against A, and the supplied ink is pressed by the press roller 10 through the opening 1a of the support cylinder 1, the mesh screen 2 and the base paper 3. A stencil printing machine that prints by transferring the oozed ink to paper is known.

In this type of stencil printing press, the supplied ink is transferred to the paper by the base paper mounted on the cylindrical plate cylinder being pressed by a press roller through the paper, and is consumed. Area other than the printing part (non-perforated part)
In this case, surplus ink is accumulated between the outer peripheral surface of the cylindrical plate cylinder and the base paper, and is pushed to the tail end of the base paper by the squeeze action of the pressing of the press roller, and finally protrudes from the tail end to stain the inside of the device. The problem of the so-called butt leakage phenomenon occurs. As a countermeasure to prevent this problem, generally, the pressing of the press roller is released short of the rear end of the opening of the supporting cylinder of the cylindrical plate cylinder to make it difficult for excess ink to spill out (first technology). ), Ink accumulated on the tail end of the base paper at the time of plate discharge is attached and discarded together with the plate discharge to reduce surplus ink (second technology), or
As disclosed in Japanese Patent Application No. 0-28670,
In FIG. 6, a weir element 9 made of a resilient ink-impermeable material is disposed between the support cylinder 1 and the mesh screen 2 at the rear end of the cylindrical plate cylinder A. A method is known in which the excess ink is stored in a cylinder plate 9 and pressed by a press roller 10 to return the excess ink into the cylindrical plate cylinder A (third technology). The weir element 9 is provided at the front edge of the non-opening portion when viewed in the rotation direction of the cylindrical plate cylinder A. FIG. 1 of Japanese Utility Model Laid-Open Publication No. 4-87262
In the technique disclosed in Japanese Patent Application Laid-Open Publication No. H11-157, the leading end of the support cylinder 2 is provided outside the leading edge of the ink impermeable zone 10.
6 is provided with a thin ink-impermeable first guide plate 12 adhered to the screen layer 3.
Inside the position opposed to a thin ink-impervious first guide plate 14 is provided with its tip to face the rear of the screen layer 3, the support cylinder and the second guide plate 14 than the first guide plate 12 2 (Fourth technology).

[0004]

However, the first technique described above is not sufficient to prevent the occurrence of tail leakage, and the tail leakage occurs with time. Further, in the second technique, a large amount of ink attached to the base paper is discarded at the time of plate discharging, so not only is the ink wasted, but also a large amount of ink adhering to the base paper adheres to the plate discharging device. There is a problem of causing malfunction. In the third technique, as shown in FIG. 6, since the excess ink accumulated by the weir element 9 is pushed back by the pressing of the press roller 10, it is good when the excess ink is small, As the amount of ink passing through the opening 1a of the support cylinder 1 increases due to a rise in temperature or the like, the excess ink also increases, and cannot be returned to the inside of the support cylinder 1 so that the base paper 3 and the mesh screen 2 at the tail end cannot be returned. There is a problem that the ink leaks out from the gap and the ink overflows. In the above-described fourth technical, the rear end of the first guide plate 12 is being bonded to the leading edge outside of the ink-impervious zone 10 of the support cylinder 2 to prevent the immersion entry of ink into the opening behind Therefore, the first guide plate 12 corresponds to a dam member for damping the ink. In the configuration having such a weir member, the ink passage zone 16 and the first guide plate 1
A large amount of ink accumulates between the second guide plate 14 and the second guide plate 14, and when the press roller is pressed there, the ink may leak out abruptly. Further, in the same technique, when ink is accumulated between the ink passage zone 16 and the first guide plate 12 and the second guide plate 14, a step is generated, and the noise generated when the press roller presses the press roller on the step is large. In addition, there are also problems that the number of parts is large, so that the assemblability is poor, and that an increase in cost cannot be avoided.

Accordingly, the present invention, in order to solve the above-mentioned problems, prevents ink leakage (tail leakage) from the tail end of a stencil printing paper mounted on a cylindrical plate cylinder, It is an object of the present invention to provide a stencil printing machine capable of improving the efficiency of ink use.

[0006]

In order to achieve the above-mentioned object, according to the first aspect of the present invention , a stencil paper is mounted on an outer peripheral surface and a porous cylindrical shape rotating around a central axis is provided. A plate cylinder, an ink supply device for supplying ink to the inner peripheral surface of the cylindrical plate cylinder, and an ink supply device disposed opposite to the outer peripheral surface of the cylindrical plate cylinder, and selectively pressed by the cylindrical plate cylinder. and a press roller, the cylindrical printing drum is extended to the one end of the a supporting cylinder with a porous opening region of a predetermined length in the circumferential direction, a screen member mounted on the outer periphery of the support cylinder
And is urged to press against the outer peripheral surface of the support cylinder.
In the stencil printing machine having an ink non-passing portion , the ink non-passing portion is provided in a rotational direction of the cylindrical plate cylinder.
See at least the rear area of the porous open area and the polymerization
And has a free end at its rear end, the inner surface of which
The inner surface directly faces the outer peripheral surface of the rear region,
The aforesaid intruded between the rear area and the ink non-passing area
The guide is guided to the rear area .

According to a second aspect of the present invention , a porous cylindrical plate cylinder which is mounted on a stencil sheet on the outer peripheral surface thereof and rotates around a central axis, and ink is provided on the inner peripheral surface of the cylindrical plate cylinder. And a press roller disposed opposite to the outer peripheral surface of the cylindrical plate cylinder and selectively pressed against the cylindrical plate cylinder, wherein the cylindrical plate cylinder has a circular shape. A supporting cylinder having a porous opening area of a predetermined length in the circumferential direction ,
One end of a screen member mounted on the outer periphery of the support cylinder
Extending in the direction of being pressed against the outer peripheral surface of the support cylinder.
In a stencil printing machine having an energized ink non-passing portion , the ink non-passing portion is configured to rotate the cylindrical plate cylinder.
At least the rear area of the porous opening area as viewed in the direction
Polymerized and has a free end at its rear end, its inner surface
Is directly opposed to the outer peripheral surface of the rear region, and the inner surface is
After penetrating between the rear area and the ink non-passing area,
The recording ink is guided to the rear region, and the pressing of the press roller is continued up to the front edge of the ink non-passing portion of the overlapping portion when viewed in the rotation direction of the cylindrical plate cylinder. .

According to a third aspect of the present invention, there is provided an ink jet printer according to the present invention, wherein:
An inclined surface is formed so as to be inclined toward the rear end side of the ink non-passing portion so as to approach the support cylinder. According to a fourth aspect of the present invention, in the stencil printing machine according to the first or second aspect, the leading edge of the ink non-passing portion which comes into contact with the base paper when viewed in the rotation direction of the cylindrical plate cylinder is formed in a square shape. It is characterized by having done.

According to a fifth aspect of the present invention, there is provided a porous cylindrical plate cylinder having a stencil sheet mounted on an outer peripheral surface thereof and rotating around a central axis, and an ink on an inner peripheral surface of the cylindrical plate cylinder. An ink supply device for supplying the ink, and a press roller disposed opposite to the outer peripheral surface of the cylindrical plate cylinder and selectively pressed against the cylindrical plate cylinder. In a stencil printing machine having a support cylinder having a porous opening area of a predetermined length in a direction and a screen member mounted on an outer periphery of the support cylinder, the screen member allows the ink to pass therethrough. and a ink not passing portion extending to one end of the screen body and the screen body, the ink not passing portion, and the rear region of at least the porous opening area as viewed in the direction of rotation of the cylindrical printing drum Polymerized and the width of the ink non-passing area Both outer edge which faces the direction fixed in close contact on both outer edges of the support cylinder, a substantially flat bag-shaped ink and the rear end of the ink non-passing section open to the inside of the support cylinder A passage is formed.
According to the sixth aspect of the invention , a stencil printing paper is mounted on the outer peripheral surface, and a porous cylindrical plate cylinder rotating around a central axis, and ink is supplied to the inner peripheral surface of the cylindrical plate cylinder. An ink supply device, comprising a pressing member disposed to face the outer peripheral surface of the cylindrical plate cylinder and selectively pressed against the cylindrical plate cylinder, wherein the cylindrical plate cylinder has a circumferential direction. a cylindrical body having an opening region extends to one end of the screen member mounted on the outer periphery of the cylindrical body, it is pressed against the outer circumferential surface of the cylindrical body
A stencil printing machine having an ink impervious portion urged in the direction, wherein the ink impervious portion includes the cylindrical plate cylinder.
At least the rear area of the opening area as viewed in the rotational direction of
Polymerized and has a free end at its rear end, its inner surface
Is directly opposed to the outer peripheral surface of the rear region, and the inner surface is
After penetrating between the rear area and the ink non-passing area,
The recording ink is guided to the rear area .

[0010]

According to the first aspect of the present invention, an ink non-passing portion is provided.
Is at least the supporting cylinder as viewed in the direction of rotation of the cylindrical plate cylinder.
Polymerizes with the rear area of the porous opening area of
Part has a free end, the inner surface of which is porous
It directly faces the outer peripheral surface of the rear area of the opening area, and the inner
Area behind the porous opening area of the holding cylinder and the ink non-passing area
To guide the ink that has entered between to the rear area.
The ink non-passing part is pressed against the outer peripheral surface of the support cylinder.
The excess ink is pushed in between the rear area of the porous opening area of the support cylinder and the ink non-passing portion, and the excess ink is forced into the inside of the support cylinder through the opening. Will be returned.

According to the second aspect of the present invention, there is no ink interruption.
The excess is at least the support circle as viewed in the direction of rotation of the cylindrical plate cylinder.
It overlaps with the rear area of the porous opening area of the cylinder, and
It has a free end at the rear end, and its inner surface is
Directly facing the outer peripheral surface of the rear area of the porous opening area, the inner surface
Is not in ink with the area behind the porous opening area of the support cylinder
Guide the ink that has entered between the excess and the rear area.
With this, the ink non-passing part is pressed against the outer peripheral surface of the support cylinder.
While being urged in the direction in which the ink is passed, the excess ink is pushed between the rear area of the porous opening area of the supporting cylinder and the ink non-passing area, and further viewed in the rotational direction of the cylindrical plate cylinder. Since the pressing of the press roller is continued up to the leading edge of the ink non-passing portion of the overlapping portion, the pressing is reliably performed and the supporting cylinder is returned to the inside from the opening of the supporting cylinder .

According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, there is no ink when viewed from the rear area of the porous opening area of the support cylinder and the rotation direction of the cylindrical plate cylinder. Between the inclined surface formed on the end surface of the front edge of the passing portion,
Larger amounts of excess ink are pushed in. According to the invention described in claim 4, in addition to the effect of the invention described in claim 1 or 2, the front edge of the ink non-passing portion that comes into contact with the base paper when viewed in the rotation direction of the cylindrical plate cylinder is formed in a square shape. As a result, excess ink does not leak from the tail end of the base paper.

According to the fifth aspect of the present invention, the ink non-passing portion is formed in at least the supporting circle when viewed in the rotation direction of the cylindrical plate cylinder.
Both outer edges facing the width direction of the ink non-passing portion overlap with the rear portion of the porous opening region of the cylindrical body, and are closely fixed to both outer edges of the support cylinder, respectively, to form an ink non-passing portion. A substantially flat bag-shaped ink passage having the rear end opened inside the support cylinder is formed, so that excess ink is pushed between the rear region of the porous opening region of the support cylinder and the ink non-passing portion. And returned from the opening of the support cylinder to the inside,
Furthermore, even if the surplus ink exceeds the opening range of the porous opening area of the support cylinder , the surplus ink is pushed through the substantially flat bag-shaped ink passage, and does not protrude from both outer edges. It is collected inside the support cylinder from the rear end of the ink non-passing portion. According to the invention described in claim 6, the ink non-passing portion is small in the rotational direction of the cylindrical plate cylinder.
At least overlap with the rear area of the open area of the cylinder, and
It has a free end at its rear end, and its inner surface is
Opposite the outer peripheral surface, the inner surface is the rear part of the cylindrical opening area
The ink that has entered between the area and the ink
By guiding to the area, the ink non-passing part
While being urged in the direction of pressing against the outer peripheral surface, excess ink is pushed between the rear area of the opening area of the cylinder and the ink non-passing portion and enters the inside of the cylinder from the opening of the cylinder. Will be returned.

[0014]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In the present embodiment, components having the same configurations and functions as the components described in FIG. 6 will be described with the same reference numerals.

In FIG. 1, a cylindrical plate cylinder A having a predetermined width in the direction of the central axis has an ink passage area 1b and a non-ink passage area 1c as a porous opening area in which a large number of openings 1a are formed. And a mesh screen 2 as a screen member that covers an outer peripheral surface of the support cylindrical body 1 and has an ink impermeable leather portion 16 superimposed on one end thereof. ing.

The cylindrical plate cylinder A is driven to rotate in a clockwise direction indicated by an arrow around a central axis also serving as the ink pipe 7 by a motor driving device (not shown). On the outer peripheral surface of the supporting cylindrical body 1 not covered with the mesh screen 2, a clamper 4 for locking the stencil sheet 3 is mounted.
The leading end of the base paper 3 is held by the clamper 4, and the base paper 3 is held by the viscosity of the ink supplied to the outer peripheral surface thereof.

The leather portion 16 is made of a synthetic resin, is adhered to the outer peripheral surface of the mesh screen 2 with its rear end 16e aligned with the tail end 2e of the mesh screen 2, and is substantially integral with the mesh screen 2. The razor portion 16 integrated with the mesh screen 2 forms an ink non-passing portion 16A, and at least a rear region of the ink passing region 1b as viewed in the rotation direction (the direction of the arrow) of the cylindrical plate cylinder A (FIG. 3 (area D shown in FIG. 3).

Inside the cylindrical plate cylinder A, an ink supply device including an ink roller 5, a doctor roller 6, an ink pipe 7, and the like is provided. The ink roller 5 is rotatably supported by a support side plate (not shown), has a length substantially equal to the width of the ink passage area 1 b of the support cylinder 1, and is slightly separated from the inner peripheral surface of the support cylinder 1. The driving unit (not shown) is driven to rotate in the same direction as the cylindrical plate cylinder A. The doctor roller 6 is disposed in parallel with the width direction of the doctor roller 6 with a small gap from the outer peripheral surface of the ink roller 5, and an ink pipe 7 having an opening 7h directed downward is disposed above the doctor roller 6. Has been established,
The ink is supplied from the opening 7h and the doctor roller 6
Ink reservoir 8 is formed between the wedge empty between the ink roller 5 and. The ink in the ink reservoir 8 passes through the minute gap between the ink roller 5 and the doctor roller 6, so that a uniform ink film is formed on the outer peripheral surface of the ink roller 5.

On the other hand, the press roller 10 has a cylindrical plate cylinder A
And is rotatably supported by an arm (not shown) provided to be swingable by a support shaft (not shown). This press roller 10
Is held at a position separated from the outer peripheral surface of the cylindrical plate cylinder A except when paper is passed. On the other hand, when the paper 13 is passed, the paper 13 is inserted between the press roller 10 and the outer peripheral surface of the cylindrical plate cylinder A at a predetermined timing by the pair of upper and lower registration rollers 11 and 12, When an unillustrated detection device that regulates the contact / separation operation is released, an arm (not illustrated) swings upward, and the press roller 10 is pressed against the outer peripheral surface of the cylindrical plate cylinder A.
Then, the press roller 10 presses the paper 13 while being driven to rotate by the cylindrical plate cylinder A, and the ink supplied by the ink roller 5 flows from the opening portion 1 a of the support cylinder 1, the mesh screen 2 to the base paper 3. After passing through and oozing, printing is performed on the paper 13.

The pressing of the press roller 10 against the cylindrical plate cylinder A is started from the leading end 1s (shown in FIG. 1) of the ink passage area 1b, and as shown in FIG. (Direction), the ink is continuously released from the front edge C of the ink non-passing portion 16A to the end of the area A1 slightly advanced. Therefore, the range up to the end of the area A1 is the ink supply range by the pressing of the press roller 10.

As shown in FIG. 1, FIG. 2 or FIG. 3, ink is supplied by the press roller 10 pressing the outer peripheral surface of the cylindrical plate cylinder A, and excess ink between the base paper 3 and the mesh screen 2 is supplied. The return ink 15 as the squeeze action of the press roller 10 causes the ink non-passing portion 1 of the support cylinder 1 to move.
6A, is pushed toward the rear region D, and is pushed into the space between the rear region D and the ink non-passing portion 16A (the region B shown in FIG. 3). , That is, inside the support cylinder 1. The return ink 15 returns to the inside of the support cylinder 1 from the opening 1a in the area B so that the laser portion 16 is brought into close contact with the outer peripheral surface of the support cylinder 1 by a tensioning means such as a tension spring (not shown). This is because the return ink 15 is pushed into the inside of the support cylinder 1 because it has a return behavior in a direction approaching the outer peripheral surface.

The state serves to prevent to leak the excess ink being pressed in press roller pressing the sheet of the tail end is a corner of the end face and the portion where the sheet contacts the leather portions, which sharpen the corner That is to say, referring to FIG. 3, the corner C1 at the front edge of the ink non-passing portion 16A that comes into contact with the base paper 3 when viewed in the rotation direction of the cylindrical plate cylinder A is processed so as not to be chamfered . Leakage of excess ink from the tail edge of base paper
The can be reliably prevented. In the experiment, but gradually ink was leaked in the case of applying the sagging side of the cut surface which can when cutting the leather corner C1, the edge portion in the case of applying the burrs side corners C1 By contacting the base paper, ink leakage was prevented.

The embodiment shown in FIG.
The structure of B is a sandwich structure in which the inner leather portion 16i and the outer leather portion 16o are bonded with the mesh screen 2 interposed therebetween. In the ink non-passing portion 16B configured as described above, the end surface C2 of the inner leather portion 16i on the side that comes into contact with the support cylinder 1, the inclined surface of the lower left edge in the drawing, that is, the rear end side of the ink non-passing portion 16B. By processing so as to form an inclined surface that is inclined so as to approach the support cylindrical body 1 as it goes, the effect of entering excess ink increases and the reliability of preventing ink leakage increases. Further, the corner shape of the end face of the inner laser portion on the side of the support cylinder may be not only a straight slope but also an R-shaped slope. Further, in the same figure, the effect of the surplus ink entering may be increased by slightly shifting the end face of the inner leather portion to the right with respect to the outer leather portion. That is, the excess ink is more likely to enter into the displaced space, making it difficult for the ink to leak, and the return ink is returned to the inside of the support cylinder 1 from the opening 1a at that position.

FIGS. 5A and 5B show still another embodiment. As shown in both figures, this embodiment is different from the above-described embodiment in that both outer edges 17 of the laser portion 16 constituting the ink non-passing portion 16C are opposed to each other in the width direction.
And a substantially flat bag-shaped ink passage 18 having an opening width 18a in which the rear end of the ink non-passing portion 16C is opened into the inside of the support cylinder 1 with an adhesive. Different. Both outer edges facing each other in the width direction of the leather portion 16
17 are respectively adhered to both outer edges of the support cylinder 1 with an adhesive.
The worn part is as clearly shown in FIG.
And are closely fixed to each other. According to this embodiment, the excess ink is supplied to the ink passage area 1 of the support cylinder 1.
b is pushed into between the rear region and the ink non-passing portion 16C and is returned from the opening portion 1a of the support cylinder 1 to the inside thereof.
Furthermore, even if the surplus ink exceeds the opening range of the ink passage area 1b, the surplus ink 19 is pushed into the ink passage 18 and advances, and the inside of the support cylinder 1 from the rear end of the ink non-passage portion 16C. Is reliably collected. The positions where the outer edges of the leather portion 16 are attached are not limited to the outer edges on the outer peripheral surface of the support cylinder 1, but may be the outer edges (edges) of the support cylinder 1. good.

[0025]

As described above, according to the first aspect of the present invention, the ink non-passing portion is formed in the rotation direction of the cylindrical plate cylinder.
At least the rear area of the porous opening area of the support cylinder
And has a free end at the rear end, inside
The surface is the outer peripheral surface of the rear region of the porous opening region of the support cylinder.
And the inner side faces the porous opening area of the support cylinder.
Remove the ink that has entered between the rear area and the ink
Guided to the rear area, supporting ink non-passing areas
Bottom biased in the direction to press against the outer peripheral surface of the cylindrical body
The surplus ink is pushed into between the rear area of the porous opening area of the support cylinder and the ink non-passing portion and is returned from the opening of the support cylinder to the inside thereof. This can prevent the ink from being used and make the use of the ink more efficient.

According to the second aspect of the present invention, the ink is
The excess is at least the support circle as viewed in the direction of rotation of the cylindrical plate cylinder.
It overlaps with the rear area of the porous opening area of the cylinder, and
It has a free end at the rear end, and its inner surface is
Directly facing the outer peripheral surface of the rear area of the porous opening area, the inner surface
Is not in ink with the area behind the porous opening area of the support cylinder
By this <br/> and guiding the penetrated ink between the over-section in the rear area, an ink non-passage portion is brought into pressure contact with the outer peripheral surface of the support cylinder
While being urged in the direction in which the ink is passed, the excess ink is pushed between the rear area of the porous opening area of the supporting cylinder and the ink non-passing area, and further viewed in the rotational direction of the cylindrical plate cylinder. By continuing to press the press roller to the front edge of the ink non-passing portion of the overlapping portion, excess ink is returned from the opening portion of the support cylindrical body to the inside while the pushing is reliably performed, It is possible to prevent the tail leakage of the ink and to use the ink more efficiently.

According to the third aspect of the present invention, in addition to the function of the first or second aspect of the present invention, ink is not seen when viewed from the rear area of the porous opening area of the support cylinder and the rotational direction of the cylindrical plate cylinder. Between the inclined surface formed on the end surface of the front edge of the passing portion,
Since a larger amount of surplus ink is pushed in, it is possible to prevent tail leakage of ink and to use ink more efficiently. According to the invention described in claim 4, in addition to the effect of the invention described in claim 1 or 2, the front edge of the ink non-passing portion that comes into contact with the base paper when viewed in the rotation direction of the cylindrical plate cylinder is formed in a square shape. By doing so, surplus ink does not leak out from the tail end of the base paper, so that the tail leakage of the ink can be more reliably prevented.

According to the fifth aspect of the present invention, the ink non-passing portion is formed in at least the supporting circle when viewed in the rotation direction of the cylindrical plate cylinder.
Both outer edges facing the width direction of the ink non-passing portion overlap with the rear portion of the porous opening region of the cylindrical body, and are closely fixed to both outer edges of the support cylinder, respectively, to form an ink non-passing portion. By forming a substantially flat bag-shaped ink passage having the rear end opened inside the support cylinder, excess ink is allowed to pass between the rear area of the porous opening area of the support cylinder and the ink non-passing section. When the ink is pushed in and returned from the opening of the support cylinder to the inside thereof, and even if the excess ink exceeds the opening range of the porous opening area, the excess ink is substantially flat bag-shaped ink.
The ink is pushed inside the passage and is collected inside the support cylinder from the rear end of the ink non-passage portion without protruding from both outer edges, so that the ink leaks from the side of the support cylinder. Can be prevented, and the use of ink can be made more efficient without fouling the inside of the machine. Contract
According to the invention as set forth in claim 6, the ink non-passing portion has a cylindrical shape.
At least after the open area of the cylinder as viewed in the direction of rotation of the plate cylinder
And has a free end at its rear end.
Inside surface of the cylindrical body is directly
The inner surface is in contact with the rear area of the open area of the cylindrical body.
Guides ink that has penetrated into the non-passage area to the rear area
By, pressure ink not passing portion on the outer peripheral surface of the cylindrical body
Excess ink is urged in the direction of contact ,
Since it is pushed into between the rear area of the opening area of the cylinder and the ink non-passing portion and is returned from the opening of the cylinder to the inside thereof, it is possible to prevent the tail leakage of the ink and to use the ink. Efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a main part of a stencil printing machine showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of FIG.

FIG. 3 is a sectional view of a main part for explaining the operation of FIG. 1;

FIG. 4 is an enlarged sectional view of a main part showing another embodiment of the present invention.

FIG. 5A is an enlarged sectional view of a main part showing still another embodiment of the present invention, and FIG. 5B is a sectional view of FIG.
A Bruno X- X cross-sectional view.

FIG. 6 is a sectional view showing a main part of a conventional stencil printing machine.

[Explanation of symbols]

Reference Signs List A cylindrical plate cylinder C leading edge of ink non-passing part C2 end face of leading edge of ink non-passing part 1 support cylinder 1a opening 1b ink passing area as porous opening area 1c ink non-passing area 2 screen Mesh screen as a member 3 Stencil paper for stencil printing 5 Ink roller as an ink supply device 6 Doctor roller as an ink supply device 7 Ink pipe as an ink supply device 10 Press roller as a pressing member 15 Return ink 16 Ink Leather part 16A, 16B, 16C constituting non-passing part Ink non-passing part

Claims (6)

(57) [Claims] 1. A porous cylindrical plate cylinder having a stencil sheet mounted on an outer peripheral surface thereof and rotating around a central axis, and an ink supply device for supplying ink to an inner peripheral surface of the cylindrical plate cylinder. ,
A press roller disposed opposite to the outer peripheral surface of the cylindrical plate cylinder and selectively pressed against the cylindrical plate cylinder, wherein the cylindrical plate cylinder has a perforated portion having a predetermined length in a circumferential direction thereof. A support cylinder having a positive opening region , and the support cylinder extending to one end of a screen member mounted on the outer periphery of the support cylinder.
A stencil printing machine having an ink non-passing portion urged in a direction of pressing against the outer peripheral surface of the cylinder, the ink non-passing portion is viewed in the rotation direction of the cylindrical plate cylinder.
Polymerized with at least the rear region of the porous opening region,
And the rear end has a free end, the inner surface of which is
The inner surface directly faces the outer peripheral surface of the rear region, and the inner surface is the rear portion.
The ink penetrated between the area and the ink non-passing portion
The stencil printing press is guided to the rear area . 2. A porous cylindrical plate cylinder having a stencil sheet mounted on an outer peripheral surface thereof and rotating around a central axis, and an ink supply device for supplying ink to an inner peripheral surface of the cylindrical plate cylinder. ,
A press roller disposed opposite to the outer peripheral surface of the cylindrical plate cylinder and selectively pressed against the cylindrical plate cylinder, wherein the cylindrical plate cylinder has a perforated portion having a predetermined length in a circumferential direction thereof. A support cylinder having a positive opening region , and the support cylinder extending to one end of a screen member mounted on the outer periphery of the support cylinder.
A stencil printing machine having an ink non-passing portion urged in a direction of pressing against the outer peripheral surface of the cylinder, the ink non-passing portion is viewed in the rotation direction of the cylindrical plate cylinder.
Polymerized with at least the rear region of the porous opening region,
And the rear end has a free end, the inner surface of which is
The inner surface directly faces the outer peripheral surface of the rear region, and the inner surface is the rear portion.
The ink penetrated between the area and the ink non-passing portion
Stencil printing, wherein the stencil printing is guided to the rear area, and the pressing of the press roller is continued up to the front edge of the ink non-passing portion of the overlapping portion when viewed in the rotation direction of the cylindrical plate cylinder. Machine. 3. The stencil printing machine according to claim 1, wherein a rear end side of the ink non-passing portion is provided on an end surface of a front edge portion of the ink non-passing portion as viewed in a rotation direction of the cylindrical plate cylinder. A stencil printing machine characterized in that an inclined surface is formed which is inclined so as to approach the supporting cylinder as it goes toward. 4. A stencil printing machine according to claim 1, wherein a front edge of said ink non-passing portion which comes into contact with said base paper when viewed in a rotating direction of said cylindrical plate cylinder is formed in a square shape. Features a stencil printing machine. 5. A porous cylindrical plate cylinder having a stencil sheet mounted on an outer peripheral surface thereof and rotating about a central axis, and an ink supply device for supplying ink to an inner peripheral surface of the cylindrical plate cylinder. ,
A press roller disposed opposite to the outer peripheral surface of the cylindrical plate cylinder and selectively pressed against the cylindrical plate cylinder, wherein the cylindrical plate cylinder has a perforated portion having a predetermined length in a circumferential direction thereof. A stencil printing machine having a support cylinder having a positive opening region and a screen member mounted on the outer periphery of the support cylinder, wherein the screen member has a screen body allowing the passage of the ink and a screen body and a ink not passing portion extending to an end, the ink not passing portion, overlaps with the rear region of at least the porous opening area as viewed in the direction of rotation of the cylindrical printing drum, and the ink Both outer edges opposed to each other in the width direction of the non-passing portion are closely fixed to both outer edges of the support cylinder, respectively, and the rear end of the ink non-passing portion is opened to the inside of the support cylinder. That the flat bag-shaped ink passage was formed Features a stencil printing machine. 6. A porous cylindrical plate cylinder having a stencil sheet mounted on an outer peripheral surface thereof and rotating around a central axis, and an ink supply device for supplying ink to an inner peripheral surface of the cylindrical plate cylinder. ,
A pressing member disposed opposite to the outer peripheral surface of the cylindrical plate cylinder and selectively pressed against the cylindrical plate cylinder, wherein the cylindrical plate cylinder has an opening region in a circumferential direction thereof. one end of the body and, cylindrical body periphery to the mounted screen member
And is urged to press against the outer peripheral surface of the cylindrical body.
In a stencil printing machine having a formed ink non-passing portion, the ink non-passing portion is viewed in the rotation direction of the cylindrical plate cylinder.
And at least overlap with the rear area of the opening area, and
It has a free end at its rear end, and its inner surface is
The inner surface directly faces the outer peripheral surface of the region, and the inner surface
Remove the ink that has penetrated between the ink
A stencil printing press characterized by guiding to a rear area .