JPH0451820B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is used in the field of photolithography to capture a large number of images (hereinafter referred to as "manuscript images") taken on one film original on one plate surface. This book concerns a printing machine, which is a device for printing on both sides, and a multi-sided printing method using it.More specifically, the document holder of this printing machine is equipped with a completely new light-shielding device, and a device for loading film manuscripts is used. This is related to the proposal of a document holder that is equipped with a new translucent glass plate (hereinafter referred to as "translucent plate") by eliminating the previous ones, and also includes the process of performing multi-sided printing. By properly operating the above-mentioned light shielding device, it is possible to completely eliminate the need for post-processing work such as burning off the area around the original image printed on multiple sides on the plate material, which is essential in the conventional method. This paper concerns a proposal for a new multi-sided printing method.

First, we will explain the current method of multi-sided printing, point out its deficiencies, and clarify the usefulness of the present invention.

First, the film original is accurately positioned on the plate-adhering surface of the transparent plate of the original holder using a center gauge or the like, and then the corners of the film original are fixed with adhesive tape.

Therefore, a light-shielding portion is formed on the light-transmitting plate in a portion other than the document image area using a light-shielding material such as adhesive tape or paper.

By the way, in this process, the sizes of the light-shielding parts to be formed vary depending on the size of each document image, which makes the process complicated and causes a large loss in working time.

In addition, when replacing the light-shielding material, glue particles tend to adhere to the surface of the light-transmitting plate, and this remains between the film original and the plate material during printing, resulting in poor adhesion between the film original and the plate material. As a result, this is a cause of blurred images.

Now, after the light shielding part has been formed as described above, the original holder is fixed in a state where it can be operated for printing, and the original holder XY direction drive mechanism provided in the printing press is operated to move the original holder to the printing plate. The original is moved to a desired position on the material surface, and there the mechanism of the original holder against the plate material is activated to bring the translucent plate (i.e., the film original) into close contact with the plate material, and the vacuum mechanism is activated to completely separate the two. After achieving close contact, it is exposed to light and printed.

By sequentially repeating this operation, a multi-sided printing plate with an arbitrary number of original images printed on the plate material is created. However, depending on the formation of the light-shielding parts using the conventional light-shielding material described above, the following It is impossible to avoid certain flaws.

In other words, although the vacuum mechanism is used to achieve perfect adhesion between the film original and the plate material as described above, the light-shielding material is not present between the film original and the plate material. This interferes with the complete adhesion between the two, resulting in blurring of the edges of the original image.

This relationship can be explained using a diagram as shown in FIG. 1A. In other words, A indicates the film original, B indicates the light-shielding material, and C indicates the plate material. This is because gaps between these materials, that is, poor adhesion, are unavoidable due to the thickness of the light-shielding material B. be.

In addition, in the figure, ho is a light-transmitting plate.

The above-mentioned defects are devised from the viewpoint of product quality regarding conventional light-shielding means. Therefore, the main purpose of the present invention is to eradicate the above-mentioned defects by fundamentally reforming the conventional light-shielding means. Although it has been made clear that this is one of the purposes, yet another main purpose of the present invention is to fundamentally reform the photolithography work process, and the circumstances thereof will be clarified below.

As is well known, photoengraving methods can be roughly divided into two types: one that creates a positive plate from a negative film original, and the other that creates a positive version from a positive film original.In both of these methods, the latter (from a positive film original) A method for creating a positive plate) is a plate material coated with a photosensitive liquid (generally called a PS plate, hereinafter referred to as "PS plate"), which has a photosensitive solution that removes the photoresist film in exposed areas through development processing. Even in the book “PS
There are two methods: one uses a plate material (hereinafter referred to as a "plano intaglio plate") coated with a photosensitive liquid that prevents the photoresist film from being removed in the exposed areas during development processing. In multi-sided printing plates created using the above-mentioned conventional light-shielding means, as a post-processing process, the margins around the multi-sided printed original image need to be removed in the PS plate, and in the flat intaglio plate, requires rubber fixing work.

By the way, as described below, these operations are very complicated and have a significant negative impact on working time, and are a major factor hindering the shortening and efficiency of the plate-making process. PS with functions
Although this has been a factor hindering the spread of the edition, until now it has only been seen as a necessary task, and at most only some consideration has been given to the procedure.

Therefore, the burn-off and rubber fixing operations will be explained based on FIG. 1C.

In the figure, ``g'' indicates a printing plate printed on multiple sides (six sides) of a film manuscript with a rough picture (printed area), and ``chi'' is a register mark printed around the original image. be.

When the same printing plate is developed, in the case of PS plate,
The exposed photoresist film in the non-image area of the film original is peeled off, while the photoresist film in the image area of the film original that was not exposed, that is, the pattern and the margins around the original image remains hardened. If this continues, the margins will become so-called solid prints in the final product, so after processing, cover the original image and register mark with a light-shielding material and attach it to the printing frame. A so-called burn-off process is performed in which the photoresist film is peeled off by exposing the photoresist to light.

This work is troublesome in itself, and since the size of the margins varies from plate to plate, it is necessary to change the size of the light-shielding material each time and reapply it. must be done,
Furthermore, the generation of adhesive waste is unavoidable, making it very complicated and inefficient.

On the other hand, in the case of planar intaglio printing, the photoresist film in the non-image areas of the exposed film original remains cured. Then, lacquer and tinctor were applied to the unexposed areas, that is, the pattern area and register marks, for sensitization, and lacquer and tinctor were applied to the margin areas.
We apply a rubber stopper that has the effect of repelling tinctor to prevent lacquer and tinctor from adhering to the margins, resulting in a solid print. The photoresist film is removed from the margins so that only the image areas and register marks are printed.

In this way, the rubber fixing work is more complicated and inefficient than the burn-off work.

One of the main objects of the present invention is to provide a light-shielding device that makes it possible to eliminate these burn-off operations and rubber-fixing operations, or in other words, to substantially eliminate one step of the current photolithography process. The outstanding effects achieved when this method is achieved are clearly understood from the above explanation.

In order to simultaneously and reliably achieve the two main objects detailed above, the present invention is constructed as follows.

(1) First, the light shielding principle is shown in Figure 1B.
This is a fundamental modification of the light shielding principle of the conventional method shown in Figure A. That is, the light-shielding material is removed from between the film original and the printing plate, and a light-shielding curtain is placed on the side of the light-transmitting plate in front of the light source, so that light is blocked through the light-transmitting plate.

In FIG. 1B, F represents a light-shielding curtain.

(2) In order to shorten the plate-making process, the above-mentioned light-shielding curtains should be arranged on the front, rear, left and right sides of the transparent plate, and each should be able to operate independently.
Moreover, in the process of printing a single multi-sided printing plate, it is a structural requirement that each light-shielding curtain be constructed so that it can move freely forward and backward to the desired position on the transparent plate. It has been configured to satisfy the conditions.

(3) In the conventional method, light was blocked on the other side of the transparent plate when viewed from the light source, so there was no particular problem with the thickness of the transparent plate, and in fact, those with a thickness of 5 mm or more are being used. In the present invention, the light-shielding portion is formed through the light-transmitting plate, so when considering the degree of refraction of the exposure light when passing through the light-transmitting plate, it is best to use the thinnest possible light-transmitting plate. This is also a structural requirement, and a translucent plate that satisfies this requirement was adopted.

(4) In the process of printing a single multi-sided printing plate, the light-shielding curtains of the light-shielding device configured as described in (1) and (2) above can be moved in and out of the desired position on the light-transmitting plate. As a result, the margins around the original image on the multi-sided printing plate are also exposed to light during the printing process, which eliminates the burn-off that was previously required.
Devised and constructed a multi-sided printing method that eliminates the rubber fastening process.

Here, in order to further facilitate understanding of the present invention, the present invention will be described below with reference to the accompanying drawings showing one preferred embodiment for carrying out the present invention.

The document holder according to the present invention includes a rotating shaft having a winding function and arranged on the front, rear, left and right sides of a transparent plate;
A light-shielding curtain is wrapped around this rotating shaft and is arranged to be able to slide back and forth on the transparent plate by forward and reverse rotation of the rotating shaft. Move the curtain to the desired position on the transparent plate.
The light shielding device consists of a rotary shaft drive mechanism equipped with a means for reciprocating from a desired position to the end, and an ultra-thin transparent plate.First, the rotary shaft drive I will add an explanation from the mechanism.

This rotary shaft drive mechanism is capable of setting the position of the light-shielding curtain to move the light-shielding curtain to a desired position on the light-transmitting plate, fully opening the light-shielding curtain to automatically retreat the light-shielding curtain set to the desired position to the end, and fully opening the light-shielding curtain. The following is a method for arbitrarily selecting one of the operations for returning the light-shielding curtain to the originally set position, which automatically returns the light-shielding curtain to the initially set position, and for smooth operation in accordance with the purpose. It is composed of

That is, a knob 1 is fixed at the end, a pulley 2, gears 3 and 4 are fixed at predetermined positions, and a spring 5 is fixed at a predetermined position.
is wound around a predetermined position and is slidably inserted into a predetermined position of the frame 6, a first rotating shaft, the frame 6;
A brake wheel 8 into which the end of a lever 7 pivotally connected is fitted, and a gear 10 with a pin 9 fixed thereto are slidably installed in a predetermined position and mesh with the pin 9 of the gear 10. A gear 12 with a ratchet 11 fixedly installed at a position, a gear 14 fixedly installed at an end position,
A second rotating shaft is provided with springs 15 and 16 wound at predetermined positions, and is slidably inserted into a predetermined position of the frame 6. A knob 17 is provided at one end of the shaft, and a pulley 18 is provided at the other end. A third rotating shaft, the frame 6, is fixedly installed, is further wound with a spring 19, and is slidably inserted into a predetermined position of the frame 6.
The lever 20 is pivotally mounted at a predetermined position.

The rotary shaft drive mechanism configured as described above is fixed to the four corners of the transparent plate 22, and the rotary shaft is connected to the gear 14 which is attached to the second rotary shaft constituting the rotary shaft drive mechanism. A gear attached to the end of each rotary shaft 23 is meshed with the end of the rotary shaft 23, so that the rotation of the second rotary shaft is transmitted to the rotary shaft 23 via the gear 14. , are regulated by rotary shaft drive mechanisms connected to each.

Incidentally, although not shown, since a coil spring is wound around each rotating shaft 23, this rotating shaft 2
The light-shielding curtain 13 wrapped around the light-shielding plate 3 is always subjected to the winding action in the side direction of the light-transmitting plate 22, and when the restriction on the rotating shaft 23 by the rotating shaft drive mechanism is released, the light-shielding curtain 13 is Each end can be rolled up.

In addition, in order to form an accurate light-shielding part, the light-shielding curtain 13 must have its tip always in close contact with the light-transmitting plate, and the center line of the light-transmitting plate 22
It is necessary to be able to move forward and backward while maintaining parallelism to -X' or Y-Y', and this embodiment also takes measures to achieve this objective.

That is, an ultra-thin metal plate with excellent tension is used as the material for the light-shielding curtain 13, and the tip of the ultra-thin plate is attached to the rotating shaft 23 so that it moves forward and backward while lightly pressing the surface of the transparent plate 22. It is wrapped.

Further, the width of each light shielding curtain 13 is formed to be approximately equal to the length of one side of the light transmitting plate 22 formed in a square shape, so that the effective exposed portion of the light transmitting plate 22 can be reliably shielded from light.

Note that 21 is a scale attached to the tip of each light-shielding curtain 13 for positioning the light-shielding curtain 13.

The operation of the present invention configured as described above will be explained below.

In the figure, FIG. 2 shows the non-operating state of the rotary shaft drive mechanism, and when it is activated and the light-shielding curtain 13 is set at a desired position on the transparent plate 22, first, as shown in the third figure, Push knob 1 in the direction of the arrow. Then, gear 4 separates from gear 10, while gear 3 meshes with gear 12. At the same time, the pulley 2 pushes the lever 7 and the brake wheel 8 separates from the gear 12.

The gear ratio of the gear 12 is set so that the position of the entire length of the light-shielding curtain 13 (from fully opened to the center line of the transparent plate 22) can be determined in one rotation, and the gear 12 rotates freely regardless of the rotation of the second rotating shaft. do.

Therefore, when the knob 1 is pressed and rotated by the desired amount in the desired direction, the rotation is transmitted in the order of gear 3 → gear 12 → ratchet 11 → gear 10 → second rotating shaft → gear 14, and the light shielding curtain 13 is moved to the desired position. It can be moved up to.

Therefore, when the pressure on the knob 1 is released, the pulley 2 is returned by the spring 5, and at the same time, the brake wheel 8 is moved to the gear 1 by the spring 16.
2, and the gear 12 is fixed.

Meanwhile, the gear 3 is disengaged from the gear 12, and the gear 4 meshes with the gear 12 again, returning to the state shown in the second figure.

Shading curtain 1 set at the desired position by the above operation
When fully opening knob 3, open knob 1 as shown in figure 4.
Push 7 in the direction of the arrow. Then, the pulley 18 pushes the lever 20, and the lever 20 pushes the gear 10, so that the gear 10 moves and separates from the gear 12 and the ratchet 11. The second rotating shaft becomes free, and the winding action of the rotating shaft 23 causes the light-shielding curtain 13 to be rolled up to the end, that is, fully opened.

Therefore, when the pressure on the knob 17 is released,
The gear 10 returns to its original position by the spring 15 and meshes with the gear 4 again, but the ratchet 11
As shown in Figure 5, it remains disengaged from the gear 10.

On the other hand, the lever 20 and the pulley 18 are connected to the gear 10.
It returns to its original position with the movement of.

The spring 19 is installed to prevent the knob 17 from shaking.

Next, when returning the light-shielding curtain 13 to the initially set position, turn the knob 1 in the opposite direction to when moving the light-shielding curtain 13 to the desired position without pressing the knob 1. Then gear 4 → gear 10 → second rotating shaft →
Rotation is transmitted in the order of gear 14 and ratchet 11.
It stops at the position where the pin 9 of the gear 10 meshes with the pin 9 of the gear 10. That is, the light shielding curtain 13 returns to the initially set position.

As is clear from the embodiments described above, the present invention proposes a light shielding device that is configured to easily set the desired position of the light shielding curtain, fully open the curtain, and return to the initially set position. In the process of printing and forming one multi-sided printing plate by effectively operating the light shielding device, the margins around the original image on the multi-sided printing plate are also exposed to light, which is necessary for post-processing work. A completely new multi-sided baking method that eliminates the need for burn-off and rubber fixing work will be described in detail with reference to FIG.

In the same figure, 24 is a plate material, 25 is a register mark, and this is the case where six sides of the original image with a design are printed on the plate material 24. In this multi-sided printing method, the following procedure is used. Then, perform baking.

First, with both light-shielding curtains fully open, various mechanisms of the printing press are operated to bring the document holder, that is, the document image, into close contact with one surface of the plate material 24. Therefore, the light-shielding curtain wrapped around the left rotation shaft and the light-shielding curtain wrapped around the upper rotation shaft were sent out and fixed in place, while the light-shielding curtain wrapped around the right rotation shaft and the lower The light-shielding curtain wrapped around the rotating shaft is left fully open to expose and print.

This printing operation also exposes the margin area indicated by 1' in the figure, which required burning off or rubber sealing in the conventional method, so that burning off or rubber sealing is no longer necessary.

Next, move the original image to surface 2 of the plate material 24 and bring it into close contact with it, and send out the light-shielding curtains wrapped around the left, upper, and right rotation shafts to a predetermined position (however, the left-hand and upper light-shielding curtains are (Since it was sent out to the specified position when the surface was printed, you only need to send out the right-hand light-shielding curtain.) If you fix it and expose and print with only the lower light-shielding curtain fully open, you can see 2 in the figure. For the same reason as the burning of the surface in 1 above, the blank space indicated by ' does not need to be burned off or rubberized.

Following the same procedure, if you print on side 3, you will get a margin 3', and if you print on side 4, you will get a margin 4'.
However, if surface No. 5 is printed, the margin portion 5' will be exposed, and if surface No. 6 is further printed, the margin portion 6' will be exposed. In other words, the margins of the original image on the multi-sided printing plate indicated by 1' to 6' are exposed to light at the same time as the printing of sides 1 to 6 according to the above procedure, so the PS plate required in the conventional method is This eliminates the need for completely complicated and inefficient work processes such as burning off the plate and attaching rubber to the flat intaglio plate.

When printing side 1, first set all the light-shielding curtains to the specified positions, then fully open only the right side and lower side light-shielding curtains before printing, and when printing side 2. Needless to say, a method may be used in which the right light-shielding curtain is returned to the initially set position.

As has been made clear through the detailed process described above, the most important requirements for achieving the idea of the present invention are:
In addition to sending out each light-shielding curtain placed on the transparent plate to a desired position, by switching an arbitrary drive means, the light-shielding curtain set at the desired position can be fully opened, and the fully opened light-shielding curtain can be returned to the beginning. A shading device configured to accurately, reliably, and easily return the shading device to the position set in By doing,
For the first time, the multi-sided printing method has the tremendous effect of eliminating one of the post-processing steps, and this example shows a suitable example for reliably achieving those conditions. It goes without saying that modifications within the scope of the invention are included within the scope of the invention.

Furthermore, another important requirement is to fundamentally reform the conventional light-shielding principle and create a structure that achieves complete adhesion between the film original and the plate material, as well as to eliminate possible negative factors, namely, the translucent plate. In order to suppress the refraction of the exposure light when it passes through the light to a range that does not interfere with the formation of the light-shielding part, the light-transmitting plate should be significantly thinner than the conventional one (about 5 mm or more), preferably 3mm・
This is a groundbreaking invention that greatly contributed to the improvement of product quality by adopting and equipping devices with a diameter of less than a meter.

The material for the light-transmitting plate is preferably an extremely thin light-transmitting glass plate, preferably 3 mm or less, but other materials can also have the same effect as long as they can minimize the refraction of light. This does not limit the material.

[Brief explanation of drawings]

Figure 1A is an explanatory diagram of the light shielding principle according to the conventional method, Figure B is an explanatory diagram of the light shielding principle according to the present method, Figure C is a top view explanatory diagram of a multi-sided printing plate according to the conventional method, and Figures 2 to 5 are FIG. 6 is a perspective view of the present invention, and FIG. 7 is an explanatory diagram of the procedure for implementing the method. The codes are; 1, 17...Knob, 2, 18...Pulley, 3, 4, 10, 12, 14...Gear, 5,
15, 16, 19...spring, 6...frame, 7,20...lever, 8...brake wheel,
9...pin, 13...shading curtain, 22...transparent plate,
23...Rotation axis.

Claims (1)

[Scope of Claims] 1. An original mounting table made of a transparent plate on which an original film is stuck on the side facing the photosensitive material, and a light-blocking area on the surface of the original mounting table opposite to the side to which the original film is stuck. A light-shielding curtain having a width approximately equal to that of the original document mounting table and disposed near the front, rear, left, and right ends of the document mounting table is used to form a light-shielding curtain, and the light-shielding curtain is extended and/or rewound to allow the document to be placed 1. A document holder for a plate printing machine for performing multi-sided printing, characterized in that the original holder comprises a drive means for the light-shielding curtain for shielding a desired area of the table from light. 2. The drive means for the light-shielding curtain is () a first rotating shaft rotatably and slidably disposed on the frame 6, which has a knob 1 at one end, a spring 5 at the other end, a pulley 2 at the middle, a first rotating shaft having gears 3 and 4; () a second rotating shaft rotatably disposed on the frame 6;
It is a rotating shaft, and has a gear 14 interlocked with the winding shaft 23 of the light-shielding curtain 13 at its end, a brake wheel 8 slidably mounted at a predetermined position, and a pin 9 fixedly attached and slidably mounted. Gear 1 with shaft
0, and a gear 12 having a fixedly installed ratchet 11 that contacts the brake wheel 8 and meshes with the pin 9 of the gear 10; () intermediate between the first and second rotation shafts; A lever 7 pivotally attached to the frame 6 of the part, the end of which is in a positional relationship in contact with the pulley 2 of the first rotating shaft, and the other end of which is a brake wheel that is pivoted to the second rotating shaft. 8. The document holder for a plate printing machine according to claim 1, further comprising a lever 7 fitted into the plate holder. 3. The drive means for the light-shielding curtain is () a first rotating shaft rotatably and slidably disposed on the frame 6, which has a knob 1 at one end, a spring 5 at the other end, a pulley 2 at the middle, a first rotating shaft having gears 3 and 4; () a second rotating shaft rotatably disposed on the frame 6;
It is a rotating shaft, and has a gear 14 interlocked with the winding shaft 23 of the light-shielding curtain 13 at its end, a brake wheel 8 slidably mounted at a predetermined position, and a pin 9 fixedly attached and slidably mounted. Gear 1 with shaft
0, and a gear 12 having a fixedly installed ratchet 11 that contacts the brake wheel 8 and meshes with the pin 9 of the gear 10; () intermediate between the first and second rotation shafts; A lever 7 pivotally attached to the frame 6 of the part, the end of which is in a positional relationship in contact with the pulley 2 of the first rotating shaft, and the other end of which is a brake wheel that is pivoted to the second rotating shaft. () A lever 20 pivotally mounted to the frame 6, the end of which is fitted between the gears 10 and 12 of the second rotating shaft; () A lever 20 fitted to the frame 6; A third rotating shaft rotatably and slidably disposed, and has a knob 17 at the end;
A printing plate machine according to claim 1, comprising: a third rotating shaft having a pulley 18 at its other end that comes into contact with the other end of the lever 20, and a spring 19 at its intermediate part. manuscript holder. 4. The document holder for a plate printing machine according to claim 1, 2, or 3, wherein the document mounting table is a rigid and extremely thin transparent plate.