JPS61266298A - Thermal stencil paper - Google Patents

Abstract

PURPOSE:To ensure that the feed quantity of a stencil paper per one feeding operation can be accurately matched to the length of an original image made into stencil by one flashing operation, by providing a plurality of display parts along the extending direction of the stencil paper. CONSTITUTION:Flash timing marks 41... as display parts are provided at an interval corresponding to the length of an original image (the first region) capable of being formed by one flashing operation, in forming an original image in the stencil paper 7. The mark 41 of the stencil paper 7 is detected by a sensor, and a flash lamp is operated to generate a flash, whereby forming of the original image in the first region (a) is completed. Next, the stencil paper 7 is fed downstream, and the second flash timing mark 41 is detected by the sensor, upon which the original image is formed in the second region (b).

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a base paper on which a heat-sensitive film and a porous thin paper are laminated, and in particular to a base paper that can be conveyed intermittently with high accuracy during plate making with a plate-making machine. It is.

(b) Conventional technology In conventional plate-making machines, one original is superimposed on one sheet of base paper, and the entire length of the original image is made with one flash of light, or a flash lamp is used as a flash light source. Plate making was carried out over the entire length of the original image by flashing it several times after each scan.

If the plate making machine and the printing machine are separate devices, there is no problem in making the plate as described above. However, in order to improve the efficiency of printing operations, a plate-making printing device in which a plate-making machine and a printing machine are integrated has been proposed (see, for example, Japanese Patent Application Laid-Open No. 13106-1983). In the case of making a plate using the above-mentioned method, it is impossible to make the plate in the manner described above due to the demand for miniaturization of the apparatus. In other words, in order to make a plate over the entire length of the original image with one flash of light, a high-output flash lamp is required, which increases the size of the plate.Moreover, if the flash lamp is used for scanning, the structure becomes complicated, which also requires a plate-making machine and a printer. It will be difficult to integrate the machines.

Therefore, when making a plate for a single manuscript image, the overlapping manuscript and base paper are scanned intermittently using a flash lamp in an attempt to suppress the increase in size and complexity (
(See Japanese Unexamined Patent Publication No. 59-7082).

However, if the base paper is conveyed while being held between rollers or the like, slips may occur, making it difficult to accurately convey the paper intermittently. Therefore, we have developed paper sheets with guide holes for conveyance on the longitudinal edges (see Japanese Patent Application Laid-Open No. 16791/1984), and paper sheets with guide holes provided at the edges in the longitudinal direction (see Japanese Patent Application Laid-open No. 16791/1983), and the spacing required for one plate-making printing (corresponding to the entire length of the original image). It has been proposed that a reinforcing portion is provided in the lateral direction with a gap in the length (see Japanese Patent Laid-Open No. 16788/1983).

(Confucian) Problems to be Solved by the Invention As mentioned above, if guide holes for conveyance are provided at the longitudinal edges of the base paper, no slip will occur between the rollers and the base paper, and the conveyance will be carried out accurately and intermittently. It becomes possible to transport. However, since the conveyance dimension is determined by the rotation speed (angle) of the conveyance roller, a servo device or the like is required to accurately drive the conveyance roller, which inevitably increases the cost and complexity.

Furthermore, even if reinforcing parts are provided in the transverse direction at intervals necessary for one plate-making printing, the length of the original image made by one flash of light is usually 1/1/2 of the total length of the original image. 4-1
/8) cannot be precisely defined.

The present invention has been made in view of the problems of the conventional technology, and it can be used without installing a servo mechanism on the conveyance roller.
The object is to realize a base paper for thermal stencil printing that can be transported intermittently with high precision.

(d) Means for solving the problem In the present invention, a plurality of display parts are formed along the extending direction, and the interval between the display parts is equal to the length of the original image made into a plate by one flash of light. This is a base paper for thermal stencil printing whose dimensions correspond to the size of the original paper.

(E) Function When the conveyance dimension of the base paper is controlled by a photo sensor, a microswitch, or by artificially detecting the display area formed on the base paper, the conveyance dimension of the base paper at one time can be controlled by one flash of light. It is possible to accurately match the length of the original image to be made into a plate.

(F) Embodiment FIG. 1 is a plan view showing an embodiment of the present invention, and FIGS. 2 to 4 are block diagrams showing a plate-making printing apparatus to which the base paper of the present invention is installed. Moreover, FIG. 5 is a time chart of the prepress printing apparatus.

In order to clarify the significance of the first display section, which is the main part of the base paper of the present invention, the overall structure of the prepress printing apparatus will be explained first.

In FIG. 2, a document table (3) on which a plurality of documents (2), . . . are stacked, is attached to the upper right end of the main body (1) of the apparatus. At the base of the document table (3), there are a separation roller (4) and a paper feed roller (5) that separate and feed the stacked documents (2) one by one starting from the lowest one. It is set up oppositely.

Both the separation roller (4) and the paper feed roller (5) are configured to rotate intermittently in a counterclockwise direction.

Photo sensors (6) (6) for detecting the original (2) are provided downstream of the paper feed roller (5).

On the downstream side of the photosensors (6) (6), there is a document (2).
) and a roll of heat-sensitive stencil printing base paper (hereinafter simply referred to as base paper) (7) are provided with first conveyance rollers (8) and (9) for conveying them in a superimposed manner.

The base paper used here is a conventionally known base paper on which a heat-sensitive film and a porous thin paper are layered. A one-sided clutch is provided on the drive shaft of the first conveyance rollers (8) and (9), and when these rollers (8) and (9) convey the base paper (7) and the original document (2), Only the conveying force is applied to the conveying force, and when the base paper (7) is conveyed by grippers (24) and (32), which will be described later, it is configured to follow.

A cylindrical cutter (10) is provided on the downstream side of the first conveyance rollers (8) and (9), and has a slightly twisted blade planted on the circumferential side of the mouth roller. 10), the rolled base paper (7) is cut into a desired length corresponding to one document image.

On the downstream side of the cutter (10), there are second conveyance rollers (11) (1) similar to the first conveyance rollers (8) (9).
2) is provided.

On the downstream side of the second conveyance rollers (11) and (12),
A plate-making machine (13) is located that forms a document image on a base paper (7). This plate making machine (13) includes a pressed plate (14) that holds the upper surface of the original (2), and a transparent glass plate (15) that presses the original paper (7) and the original (2) against the pressed plate (14). , a flash lamp (16) mounted on the back side of a transparent glass plate (15), and a pressurizing device (17) for raising the transparent glass plate (15) and flash lamp (16) to -. The pressurizing device (17) is composed of an air cylinder, but may also be composed of a motor and a cam.

On the downstream side of the plate-making machine (13), a third conveyance roller (
18) is provided, and this third conveyance roller (18) is provided.
) is pressed against a peeling roller (20) rotatably mounted on the free end of the swing lever (19). The angle between the tangent at the point of contact between the third transport roller (18) and the peeling roller (20) and the plane of the glass plate (15) makes it easier to peel the base paper (7a) and the original (2). It is set at approximately 60°. In addition, in the following, the base paper after plate making is (7a), and the base paper after printing is (7b).
Shown in

A storage chamber (21) is formed below the third transport roller (18) to temporarily store the original paper (7a) after plate making on which the original image is formed.

Further, on the downstream side of the third conveyance roller (18), there is provided a document guide plate (22) for discharging the document (2) peeled from the base paper (7a) by the peeling roller (20).

The printing machine (23) includes a single-cylinder second plate cylinder (25) and a press roller (26) that presses the printing paper (26) onto this plate cylinder (25).
27) etc. A clamper (28) for holding the downstream edge of the base paper (7a) is provided in the non-printing area of the plate cylinder (25), and this clamper (28) is provided in the apparatus main body (1). It is configured to be closed by a cam (29) and opened by a plate discharger (30), which will be described later. The structure of the plate cylinder (25) itself is the same as that conventionally known, so its explanation will be omitted.

The plate cylinder (2) is moved from the position where the cutter (10) is provided.
A pair of endless timing belts (31) (31) are connected to the position where the timing belts (31) (31) are provided, and the timing belts (31) (31) are connected to the downstream side of the base paper (7). A gripper consisting of a lower support piece (24) and an upper tongue piece (32) is attached to grip the edge (
(See Figures 2 and 3).

On the left side of the plate cylinder (25), the clamper (28) is opened and the base paper (7b) after printing is transferred to the plate cylinder (25).
5) is provided with a plate discharging machine (30) for removing the plate from the plate. This plate discharge machine (30) includes a means (not shown) for opening the clamper (28) and a plate cylinder (28) for moving the base paper (7b) onto the plate cylinder (28).
5) and the peeling claw (33) that peels off the peeled base paper (
7b) into the base paper storage box (34).
5) and (36), the base paper storage box (34) is horizontally attached to and detachable from the main body (1) of the apparatus.

At the bottom left side of the main body of the device (1), there is paper (26) before printing.
A conventionally well-known paper feed tray (37) and paper feed roller (38) are provided, in which the topmost paper (26) is loaded.
) are sequentially fed between the plate cylinder (25) and the press roller (27). At the bottom of the right side of the device body (1), there is a
a conveyor (39) that conveys the printed paper (26);
A paper ejection tray (4) that stores and stores ejected paper (26).
0) is provided.

Note that this apparatus is sequence-controlled by a microcomputer and is configured so that the plate-making machine (13) and the printing machine (23) can operate simultaneously.

As shown in FIG. 1, the roll-shaped base paper (7), which is the main part of the present invention, has an original image (first area) that can be formed with one flash of light when forming an original image. Flash timing marks (41
)..., and the apparatus body (1) is provided with a photosensor (42) for detecting the marks (41)... This flash timing mark (4
1). is printed in advance on the base paper (7), but it may also be displayed as a through hole, and the through hole may be detected by a microswitch. It can also be formed by pasting small pieces of aluminum foil.

Next, the operation of this apparatus will be explained mainly with reference to FIGS. 1, 2, and 5 (time charts).

The base paper (7) is previously transferred to first and second conveyance rollers (8).
(9), (11), and (12') are slightly fed to the plate making machine (13) side, and the downstream edge portion thereof is located downstream of the second conveying roller (11), (12) (position A). ), it is held and stopped by grippers (32) and (24). In this state, when the operator operates a start switch (not shown) after placing a plurality of originals (2) on the original placing table (3), the grippers (32) (24 ) moves forward in the downstream direction while holding the base paper (7), and the plate cylinder (25
) on the upstream side (position B). At this time, the first
, the second conveyance rollers (8), (9), (11), and (12) follow the movement of the base paper (7). In addition, when the grippers (32) (24) move forward, the peeling roller (20) moves to the third position (the position indicated by the two-dot chain line in FIG. 2) that allows the grippers (32) (24) to pass through. Conveyance roller (18
) and evacuated.

At the same time that the feeding of the original paper (7) is started, the original paper (2) is fed.
)... both the separation roller (4) and paper feed roller (5) rotate slightly counterclockwise, and only the bottom document (2) is separated. The separated original (2) is placed on the photosensor (
6,) When detected at (6), the separation roller (4) is fixed and the paper feed roller (5) becomes driven, but at this time, the downstream edge of the document (2) has already touched the It is sent between the first conveyance rollers (8) and (9). Therefore, the manuscript (2
) are conveyed together with the base paper (7) in a superimposed state.

The grippers (24) and (32) are configured so that when they reach position B, the downstream edge of the document (2) is positioned downstream of the transparent glass plate (15) of the plate-making machine (13). There is. Also, at this time, the flash timing mark (41) on the base paper (7) is detected by the sensor (42) (42), but at this point, no flash is emitted yet, and the flash timing mark (41) on the base paper (7) and the original (2) are detected. is just stopped. Base paper(
7) and manuscript (2) are stopped, the plate-making machine (1)
3) pressurizing device (17) operates to press the transparent glass plate (15).
) rises, and the base paper (7) and original (2) are pressed between the pressed plate (14) and the transparent glass plate (15). When the flash lamp (16) emits a flash in that state,
A document image is formed in the first area (see FIG. 1) of the original paper (7) by this flash of light. Since this image forming action is well known, the explanation thereof will be omitted.

When the formation of the original image in the first area is completed, the pressure device (17) is driven and the transparent glass plate (15) is lowered, and the original paper (7a) and the original (2) after plate making are released without being pinched. It becomes a pressure state.

Next, the swing lever (19) rotates and the peeling roller (2
0) is pressed against the third conveyance roller (18), and this third
The transport roller (18) starts rotating counterclockwise.

At the same time, the first and second conveyance rollers (8)
(9), (11), and (12) also start driven rotation.

Then, the original (2) and the base paper (7a) are conveyed to the downstream side, and are sequentially peeled off from the downstream edge portion by the peeling roller (20). Then, the original (2) is discharged upward along the guide plate (22), and the original paper (7a) is loosened and sequentially fed into the lower storage chamber (21) and shredded.

As the base paper (7a) is conveyed downstream, the second flash timing mark (41) is moved to the sensor (4).
2) When detected at (42), that is, when the second area of the original (2) arrives on the transparent glass plate (15),
The third conveyance roller (18) has stopped, and the first and second conveyance rollers (8), (9), and (11) are driven accordingly.
(12) also stops.

After that, the same process as above is repeated, and the base paper (7) is
The original image is formed in the second area of the original paper (7a
) are sequentially stored in the storage chamber (21).

At this time, in order to prevent a non-image forming part from occurring between the first area and the second area of the base paper (7),
The conveyance dimensions are controlled so that the two head regions slightly overlap. In order to facilitate this control, the interval between the flash timing marks (41) may be set to be slightly shorter than the length of the original image produced by one flash of light.

In this way, for each manuscript (2), the original paper (7)
etc., is conveyed intermittently six times, and the flash lamp (16) is flashed six times in synchronization with the stoppage, so that a document image is formed on the base paper (7) over the entire area (the length of one sheet of document), and the plate-making process will be completed. In this device, the entire area of the original image is formed on the base paper (7) by flashing light six times, but by increasing the size and output of the flash lamp (16), etc., this number of times can be reduced. It is possible.

When the plate-making operation is completed, the grippers (24) (32)
moves the clamper (28) of the plate cylinder (25) to its own position (C position) and releases the base paper (7a). Original paper (7
At the same time that the downstream end edge of a) is released from the grippers (24) and (32), the clamper (28) of the plate cylinder (25) is closed, and the said end edge is connected to the clamper (28) of the plate cylinder (25). 28
). At this time, grippers (24) (32)
) without completely opening the base paper (7a).
The clamping force may be weakened.

After that, the grippers (24) and (32) grip the base paper (7a).
Return to position B with the button open, and then release the original paper (7)
is cut by the cutter (10).

Next, when the plate cylinder (25) rotates counterclockwise, the base paper (7) after plate making stored in the storage chamber (21) is pulled out and wound around the plate cylinder (25). Next, two test prints are performed, and the printing preparation is completed, but the time required up to this point is 25 seconds.

Thereafter, a predetermined number of sheets are printed.

In this way, while the first document (2) is being printed, the lever (19) rotates clockwise and the peeling roller (20) is separated from the third conveyance roller (18). After separating again, the grippers (24) and (32) return to their original positions (position A). After the grippers (24) (32) are once released, the first and second conveyance rollers (8) (9) (
11) and (12) are driven, and the downstream edge of the second sheet of base paper (7) is inserted and held between the grippers (24) and (32). One cycle ends at this point, and the time required up to this point is 30 seconds after the start switch is operated.

Then, after going through the same process as above, the second manuscript (2
) is formed on the original paper (7). That is, while the first document (2) is being printed, the second document (2) is being printed.
The original image of 2) is formed on the original paper (7) and placed in the storage chamber (21).
is stored in

When a predetermined number of sheets of the first original (2) have been printed, the plate discharge machine (30) operates to
7b) is stored in the base paper storage box (34).

So, while the second manuscript (2) is being printed,
The original image of the third original (2) is formed on the original paper (7), and the above steps are repeated until all the originals on the original platen (3) are printed. Although not shown, when printing of the last manuscript (2) starts, the plate making machine (1
3) stops its operation.

The base paper (7) in this example is wound into a roll, but it is alternately folded in opposite directions, as is used in computer terminals. It may also be a single sheet having a length corresponding to the length of one document.

Furthermore, this device uses a flash timing mark (41
)... is automatically detected by the photosensor (42) (42), but this mark (41)... can also be detected visually and the operation of the plate making machine can be controlled manually. be.

(g) Effects of the invention In the present invention, a plurality of display parts are formed along the extending direction of the base paper, and the interval between the display parts is a size corresponding to the length of the original image made into a plate by one flash of light. Therefore, if the base paper is intermittently conveyed based on this display section, it can be conveyed with high precision.

Therefore, a servo device for conveying the base paper is not required, and plate making can be easily and accurately performed using an inexpensive and simple plate making machine.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the base paper of the present invention, Figs. 2 to 5 show a plate-making printing apparatus to which the base paper of the present invention is mounted, Fig. 2 is a configuration diagram, and Fig. 3 is a partial plan view. 4 is a side view corresponding to FIG. 3, and FIG. 5 is a time chart. (7) (7a) (7b) - Thermal stencil printing base paper, (16
)...Flash lamp, (41)...Flash timing mark (display section).

Claims (1)

[Scope of Claims] 1. A base paper on which a heat-sensitive film and a porous thin paper are laminated, in which a document is closely attached to the base paper, and these are intermittently conveyed as one unit, and synchronized from the base paper side when stopped. In a device in which a single manuscript image is made into a plate by irradiating a flash of light multiple times, a plurality of display areas are formed along the extending direction, and the intervals between these display areas are determined by the plate making by one flash of light. A base paper for thermal stencil printing, characterized in that the size is set to correspond to the length of a document image. 2. The base paper for thermal stencil printing according to claim 1, wherein the interval between the display parts is set to be slightly shorter than the length of the original image made by one flash of light. 3. The heat-sensitive stencil printing base paper according to claim 1 or 2, wherein the display portion is formed of a material having a transmittance or reflectance different from that of the heat-sensitive film or the porous thin paper. 4. The thermal stencil printing base paper according to claim 1 or 2, wherein the display portion is formed of a through hole. 5. The thermal stencil printing base paper according to any one of claims 1 to 4, wherein the display portion is formed along at least one side edge of the base paper. 6. The base paper for thermal stencil printing according to any one of claims 1 to 5, which has a band shape and is wound into a roll. 7. The base paper for thermal stencil printing according to any one of claims 1 to 5, which is a single sheet having a length corresponding to the length of one document.