JPH0316018B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing apparatus used in the printing process of printing plates, etc., in which an image on an original plate such as a surface film is printed onto a photosensitive material, for example, a plate material coated with a photosensitizer, and in particular, a printing device used in the printing process of a printing plate, etc. The present invention relates to a printing device that can automatically print test patterns onto external surfaces. The printing plates are equipped with various test patterns outside the picture area, as shown in Figure 6, in order to visually check the degree of completion of the plate-making and the quality of printing on the substrate using the plates. It is being Usually, these test patterns are attached to a transparent mount and printed together with various color-separated manuscripts at the master production stage, or they are pasted outside the design area of the master plate and printed together with the master at the printing plate-making stage. The current situation is that

By the way, in the case of four-color printing, for example, these test patterns are provided on each printing plate for cyan, magenta, yellow, and black. To prevent the patterns from overlapping each other, the test patterns must be separated by at least the width. For this reason, the above-mentioned test pattern pasting operation is quite complicated, and even though it takes a long time, it has not been possible to eradicate mistakes that cause test patterns to overlap on the printing substrate. In addition, the process of manually attaching test patterns using adhesive tape, etc., as described above, has become an obstacle as the entire plate-making process is being automated. Automation of related work is considered an issue.

In view of the above-mentioned current situation, it is an object of the present invention to provide a printing device that can automatically print a test pattern at a predetermined position outside the picture area at the same time as printing an image such as an original film onto a printing plate. It was done for a purpose.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings regarding such an embodiment of the apparatus.

FIG. 1 is a side view of this embodiment of the apparatus with the side plate removed, and FIG. 2 is a plan view showing the arrangement of its main parts.

We will first explain the configuration of each mechanism that automatically prints the printing plate of this embodiment device, and then explain the configuration of the mechanism that automatically prints the test pattern at a predetermined position outside the picture area of the printing plate. do.

The multi-tiered (5 stages in this example) pallets 10 located in the standby position approximately in the center of both figures are an empty pallet 10A for collecting used original plates that stores used original plates in order from the top, and an empty pallet 10A for original plate collection in which original plates are stacked and stored in the order of use. A pallet 10B, pallets 10C, 10D, and 10E for photosensitive material sheets in which photosensitive material sheets such as printing plates are divided into sizes corresponding to original plates and stored separately, each of which has a guide member 1, which will be described later, attached to each pallet.
It is engaged with the guide rail 1 via 3 and 13'. The guide rail 11 is disposed horizontally between the above-mentioned pallet standby position and a pallet pull-out position immediately above the exposure section 12 provided adjacent thereto. FIG. 3 is a plan view of the original plate pallet 10B, but as shown in this figure, the other pallets also have a pair of guide rollers using ball bearings that roll on the upper surface of the rail 11 at the corners of the panel frame. , guide members 13 and 13' consisting of guide rollers also using ball bearings that roll on the inner surface of the rail 11 and brackets that hold these guide rollers horizontally or vertically are attached.
The guide member 13' includes a connecting member 14 that engages with a pallet moving mechanism 45 (described later) that selectively reciprocates any one of the pallets 10 to 10E along the rail 11 between a standby position and a pull-out position. installed. For example, an original plate is taken out from the original plate pallet 10B pulled out by the pallet moving mechanism 45 at the pallet draw-out position, and then transferred to the transparent glass plate 15 provided at the upper part of the exposure section 12.
A carrier 16 is provided for setting. The carrier 16 is adapted to run along a rail 17 disposed above and parallel to the guide rail 11 in the same way as the pallets 10A to 10E run along the rail 11, as shown in FIG. a flange-shaped air cylinder 19 fixed to the center thereof, a guide tube 20 fixed to its four corners, and slidably engaged with the guide tube 20,
Four guide rods 22 are connected to each other via a connecting plate 21 at their upper ends, and the actuating rod of the air cylinder 19 and the guide rod 2
The main part thereof is composed of movable plates 23 connected to the movable plates 2 and 2, respectively. A support rod 24 is attached to the movable plate 23 horizontally via a bracket fixed thereto.
A pair of suction cups 25 are attached to a holding bar fixed perpendicularly thereto, and a suction cup 25 is attached to a holding bar fixed at right angles thereto.
A plurality of pieces (nine pieces in this embodiment) are fixed corresponding to the positions indicated by the dotted chain lines. Further, another holding bar is attached to the support rod 24 perpendicular thereto and slidably engaged therewith, and a suction cup 26 is attached thereto in substantially the same arrangement as the suction cup 25. The holding bar of the suction cup 26 is connected to a small gear motor 27 fixed to the movable plate 23 between the pair of support rods 24, and is rotatably supported by a bearing stand attached to the movable plate 23. It is screwed together with the screw 28. Therefore, the holding position of the suction cup 26 can be adjusted by rotationally driving the gear motor 27 using a feed screw. Air cylinder 19
is a single-acting type, and the retraction of the actuating rod, that is, the raising of the movable plate 23, is performed by compressed air supplied through the directional control valve and the flow control valve, and the retraction of the actuating rod, that is, the lowering of the movable plate 23. This is accomplished by releasing the compressed air in the cylinder to the outside air through the flow rate control valve and the directional switching valve, and the actuating rod naturally falls overlapping the movable plate 23, guide rod 22, etc. that act on it. At this time, the downward speed of the movable plate 23 is maintained at an appropriate level by the opening degree of the flow rate control valve. In addition, the movable plate 23 moves the guide tube 20
Since it moves up and down together with the guide rod 22 which is slidably engaged with the air cylinder 19, the air cylinder 19 moves up and down accurately along the axis of the air cylinder 19 without being biased left, right, front or back. The stroke length of the actuating rod of the air cylinder 19 is set to such an extent that the suction cups 25 and 26 in the illustrated positions sufficiently contact the upper surface of the transparent glass plate 15 above the exposure section 12. In addition, connecting plate 2
Needless to say, 1 has a punched hole in its center so as not to interfere with the air cylinder 19.

The pallet standby position and the exposure section 1 adjacent thereto.
Discharge belt conveyor 2 provided on the opposite side from 2
9, there is a reversing conveyance mechanism 3 in which a framework 31 having a suction cup 30 is fixed to a rotating arm 32 in a cantilevered manner.
3 is provided. A shaft neck is fixed to each of the left and right rotating arms 32, and both shaft necks are rotatably supported by bearings fixed to the frame. A sprocket wheel 34 is fixed to one shaft neck, and an endless chain is connected between this sprocket wheel 34 and a sprocket wheel 36 fixed to the output shaft of a gear motor 35 with a brake fixed to the frame. The rotating arm 32 is rotated clockwise by rotating the gear motor 35, and the frame 3
1 rotates along the arrow, inverts the exposed photosensitive material sheet (indicated by the two-dot chain line) held by the suction cup 30, brings it directly above the discharge conveyor 29, and transfers it to it. It is made to be. When the frame 31 is located at the pallet standby position or directly above the discharge conveyor 29, the stop position of the rotary arm 32 is set to a limit switch (Fig. (not shown)
It is regulated by the operation of Although not shown in the figure, the discharge belt conveyor 29 is connected to an automatic developing device in the direction of the arrow shown in FIG.

Next, the structure of the pallet moving mechanism will be explained with reference to FIG.

The guide member 13' of the pallets 10A to 10E has a connecting member 1 that engages with the pallet moving mechanism 45.
4 is installed. The connecting member 14 consists of an arm portion 40 fixed to the bracket of the guide member 13' described above, and a roller 41 using a ball bearing fixed to the bent end of the arm portion 40. The pallet moving mechanism 45 includes guide pipes 46 fixed to the frame in parallel with each other in the horizontal direction.
A support plate 48 is fixed to a guide block 47 that is slidably engaged with a threaded rod that is rotatably supported via ball bearings housed in brackets attached to the upper and lower ends of the support plate 48. 49, a connecting nut portion 50 which is screwed onto the threaded rod 49 and is prevented from rotating, an air cylinder 51 (see FIG. 2) fixed to both ends of the frame, and its operating rod 52. , and a connecting block 53 fixed to the support plate 48. A driven toothed sheave 54 is fixed to the upper end shaft of the threaded rod 49, and a driving toothed sheave 56 is fixed to the output shaft of the pulse motor 55, and a timing belt 57 is stretched between these sheaves 56 and 54. . The pulse motor 55 is fixed to the upper guide block 47 via a support frame.

The connecting nut portion 50 has a U-shaped cross section on the side facing the connecting member 14, and the connecting nut portion 50 has a U-shaped cross section and
It is made to fit together.

The original plate set on the transparent glass plate 15 of the exposure section 12 and the photosensitive material sheet superimposed on it are further covered with a rubber sheet, and the residual air between them is vacuum-sucked to cover the original plate and the photosensitive material sheet with glass. It is adapted to be in close contact with the plate 15 under vacuum. A rubber sheet carrier 60 is provided for this purpose. The rubber sheet carrier 60 is a rubber sheet whose width is slightly wider than that of the glass plate 15, wound around a hollow shaft in the shape of a hoop, and the ends of which are fixed to a frame.
A pair of left and right support plates running along the rail 61 hold a presser roll on which a rotating shaft is supported so as to be slidable in the vertical direction, and the lower end of one of the support plates is connected to a motor. It is connected to an endless chain 62 which is driven by the motor. Therefore, when the endless chain is run in the direction of the arrow, the rubber sheet carrier 60 moves in the direction of the arrow while feeding out the rubber sheet, and the presser roll following it moves the register pins planted in the glass plate 15. Due to the action of a plate cam that comes into contact at a position that has gone too far, it descends under its own weight and rolls while pressing against a rubber sheet. When the endless chain is run in the opposite direction, the rubber sheet is automatically wound in by the torque acting on the mainspring spring built into the hollow shaft, and is peeled off from the glass plate 15. It's becoming like that.

At the center of the bottom of the exposure section 12, an instantaneous mercury lamp (metal halide lamp) 65, which emits blue light or ultraviolet light strongly, is installed as a light source in a reflecting mirror 66. and exposure section 1
An exhaust fan 67 is provided on the outer wall of the container 2 to exhaust hot air inside the container. 67' is a ballast for the mercury lamp 65; 68 is a vacuum pump for suction cups 25, 26, and 30 as well as for vacuum sealing the original plate and sensitive material sheet; 69 is a supply of compressed air to air cylinders 19, 51, etc. It is compressusa.

The structure of each mechanism for printing the printing plate described above has already been filed by the present applicant as Japanese Patent Application No. 1987-38734.

Next, the structure of a mechanism for printing a test pattern at a predetermined position outside the picture area of the printing plate will be explained with reference mainly to FIGS. 5 to 11.

Fig. 5 is a partial plan view of the test pattern film, Fig. 6 is an enlarged view of two examples of test patterns printed on the test pattern film, and Fig. 7 is a partial plan view of only the periphery of the exposed area shown in Fig. 2. Figure 8 is a partially omitted enlarged external front view of Figure 7 viewed from the direction of thick arrow A, Figure 9 is a partial sectional view of the - cross section of Figure 7 viewed from the direction of the arrow, and Figure 10 is a partially omitted enlarged external front view of Figure 7. FIG. 11 is a partial external side view with the rail 61 removed as seen from the direction of thick arrow B.
FIG. 0 is a partial perspective view of FIG.

The test pattern film 100 is a transparent belt-shaped film with test patterns S, T, and D printed on the photoresist surface at a pitch l in the arrangement shown in the figure. It is used by pasting the film side up. Various types of test patterns are used, but they are all representative: S is called a starter target, T is a signal strip, and D is a dot gain scale. However, D cannot be accurately expressed by hand-drawing, so it is not shown.

The holding film 101 to which the test pattern film 100 is pasted is a transparent belt-like film that is placed on the surface of the glass plate 15 near the pallet standby position of the exposure section 12, on the left and right sides (hereinafter referred to as this) when viewed from the direction of the thick arrow in FIG. The number of the component on the left side is given L, and the number on the right side is given R), and each end has a rail 61,
It is wound around pulleys 103L and 103R via guide rollers 102L and 102R, which are held so as to be horizontally movable parallel to the rail 61 in each gap between the inner main body frames. Guide rollers 102L, 102R
are rotatably supported on the upper parts of the guide frames 104L and 104R, respectively, and the pulley 103
L, 103R are guide frames 104L, 104R
are rotatably supported integrally with drive shafts 105L and 105R, respectively. Drive shaft 105
Both ends of L and 105R are rotatably supported by a pair of brackets 106 and 106' fixed to the left and right body frames, respectively, so as to prevent movement in the axial direction. Torque motor 107 fixed to 106'
It is connected to the output shaft of a reversible motor 107R with an L electromagnetic brake via a joint. Drive shaft 1
Above 05L and 105R, there is a bracket 10.
Guide rods 108 having their ends fixed to pins 6 and 106' are provided parallel to the drive shafts 105L and 105R. And the guide frame 104L, 1
04R is slidably engaged with the drive shafts 105L, 105R and the guide rod 108, respectively. Drive shaft 105L, 105R
is provided with a long keyway in the axial direction, and a slide key fixed to the shaft hole of the pulleys 103L, 103R is slidably engaged with this keyway, and the pulleys 103L, 103R are also slidably engaged. is engaged with. Therefore, the guide frames 104L, 104
R represents drive shafts 10 arranged horizontally above and below each other.
5L, 105R and guide rods 108, 10
8 as guides, so that they can be horizontally moved parallel to the rail 61. Foot-shaped double-acting air cylinders 109 are fixed to the left and right main body frames, respectively, and a double-acting air cylinder 109' is connected to the operating rod thereof. Joint shaft 110 fixed to guide frames 104L and 104R
is connected.

Therefore, the left and right air cylinders 109, 10
The guide frames 104L,
104R is simultaneously moved horizontally along the drive shafts 105L, 105R and guide rods 108, 108, respectively, and is held in the closest position to the bracket 106'.

This means that the guide rollers 102L, 102R
In other words, the holding film 101 is positioned at the P position shown in FIG. 7. In this state, if only the left and right air cylinders 109' are driven to retract their operating rods, the holding film 101 will be moved.
If the actuating rods of the left and right air cylinders 109 are driven to the Q position and retracted, the holding films will be positioned at the R position.

Next, the operation of this device will be explained.

As shown in FIG. 3, the original plate is a pallet 10B for the original plate, and the register pins planted in the pallet are fitted into reference punch holes drilled in the original plate pallet 10B.
When viewed from the operating side indicated by the arrow, the right edges are aligned and stacked upwards in the order of use, while photosensitive sheets, such as plate sheets, are stacked, for example, A1,
Register pins are fitted into the punch holes drilled in each sheet in the same manner as described above for each size such as B2 and A2, and pallets 10 for photosensitive material sheets are assembled.
Assume that they are stored in C, 10D, and 10E, respectively. Let's take as an example the case of printing on an A2 size plate material sheet.

First, the original plate pallet 10B in the standby position is pulled out to the pull-out position by the pallet moving mechanism 45. To do this, the pulse motor 55 is rotated in a predetermined direction by a predetermined number of pulses, and the connecting nut portion 50 shown by the two-dot chain line that is engaged with the connecting member 14 of the pallet 10A in FIG. 4 is rotated along the threaded rod 49. It is lowered and engaged with the connecting member 14 of pallet 10B. Next, the air cylinder 51 is operated to push out the operating rod 52, and the mechanism 45 is moved along the guide pipe 46, thereby drawing out the pallet 10B to the drawing position. This positioning is performed by the frame of the pallet 10B coming into contact with a stopper (not shown).

In this case, since the pallet 10B is moved via the connecting member 14 fixed to one side of the pallet 10B, the guides attached to the guide members 13, 13' and rolling in contact with the inner surfaces of the rails 11. When a slight gap exists between the rollers and the rail 11, a slight meandering occurs, which causes the register pins of the pallet 10B to be misaligned. In order to prevent this deviation, each of the pallets 10A to 10E has a pinion a fixed at each end, and a shaft c is rotatably mounted on the side frame with the bearing gap as small as possible, and the pinion a
are adapted to mesh with the racks b provided on the outer upper portions of the rails 11 in phase with each other.

Pallet 10 pulled out accurately at the drawer position
An A2 size original plate is taken out from B using the carrier 16. In this case, as for the suction cup 25, as shown in FIG. 3, the one located at the left end is not activated, and the holding position of the suction cup 26 is adjusted to match the A2 size.
While releasing the compressed air inside the air cylinder 19 as described above, the movable plate 23 is naturally lowered at an appropriate speed, and the suction cups 25 and 26 are brought into contact with the original plate _A2 and adsorbed thereon. Then, by supplying compressed air to the air cylinder 19 and retracting the actuating rod, the original plate A ₂ suctioned by the suction cups 25 and 26 is held as shown by the two-dot chain line.

Then, the pallet 10B is transferred to the pallet moving mechanism 45.
Then, while releasing the compressed air inside the air cylinder 19, the movable plate 23 is lowered as described above, and the original plate _A2 is set on the transparent glass 15. Then, the vacuum of the suction cups 25 and 26 is broken, and the movable plate 23 is returned to its original position by the same operation of the air cylinder 19 as described above.

In this case, since the punch holes of the original plate _A2 are positioned directly above each of the register pins embedded in the glass plate 15, the original plate
A ₂ is set correctly.

However, just to be sure, when the register pins are slightly inserted into the respective punch holes for both the original plate and the plate material sheet, the release of compressed air from the air cylinder 19 is stopped, and the descent is temporarily stopped to perform a check. It is better to

Next, an A2 size plate material sheet is set on the original plate, but prior to that, a test pattern film 100 is set on the original plate, which is printed as close to the picture as possible in the margin area outside the picture area of the original plate.

To do this, move the holding film 101, on which the test pattern film 100 is pasted with the printed film side of the pattern facing up, from the standby position P to the stacking position R on the A2 size original plate, and move the left and right air cylinders 109, 109'' together. X by driving
- Move by traverse in the X direction and hold at this position.

After doing this, the plate 10E containing the A2 size printing plate sheet is moved to the glass plate by having the pallet moving mechanism 45 and the carrier 16 perform an operation similar to the operation described above for the pallet 10A. Original board set on board 15
Align it exactly on top of A ₂ . Then, the rubber sheet is spread over the superimposed original plate and plate material as described above by the rubber sheet carrier 60, and vacuum suction is applied to the rubber sheet and glass plate 15.
The residual air between them is removed, and the original plate and plate material sheet are vacuum-adhered to the glass plate 15.

In this case, a slight gap is created between the original plate _A2 and the rubber sheet along the inner side of the part where the test pattern film 100 and the holding film 101 are overlapped on the original plate A2, and this gap is created in the margin area. There is no problem, but the film 10
0,101 to be extremely thin, vacuum pump 6
If a large capacitance is used for 8, the effect of the gap on vacuum adhesion can be ignored. Then, the mercury lamp 65 is turned on, and the mercury lamp 65 is turned on for a predetermined period of time, for example.
Exposure is performed for about 40 seconds to complete printing.

The rubber sheet carrier 60 is returned to the position shown in FIG. 1 and the rubber sheet is removed, the vacuum being broken beforehand. Next, after returning the holding film 101 to the standby position P, the movable plate 23 of the carrier 16 is lowered and the suction cup 2
5 and 26, the exposed printing plate sheet is attracted, peeled off from the original plate, and held at the position shown in FIG. Then, an air cylinder (not shown) connected to the carriage 18 of the carrier 16 is operated to move the carrier 16 to the pallet standby position, break the vacuum of the suction cups 25 and 26, and release the exposed material held there. The plate material sheet is reversed and conveyed by the mechanism 33.
It is adsorbed to a suction cup 30 attached to a rotating framework 31 and transferred.

Next, the frame 31 is rotated in the direction of the arrow, the exposed plate material sheet is inverted and brought directly above the discharge belt conveyor 29, the vacuum of the suction cup 30 is broken, and the plate material sheet is delivered to the belt conveyor 29,
It is discharged in the direction of the arrow shown in FIG. If an automatic developing device is provided connected to the discharge belt conveyor 29, it is preferable to synchronize the discharge speed with the speed of the developing process. In addition, since the printing plate sheet was set so that the side coated with the photosensitive agent was in contact with the original plate, when it was turned over and delivered to the discharge belt conveyor 29 as described above, the side coated with the emulsion was on the upper side, Since the film does not come into direct contact with the film, it is possible to prevent damage during transport to the developing device.

While the exposed plate material sheet is being transferred to the discharge belt conveyor 29 by the reversing conveyance mechanism 33, the carrier 16 is returned to the position shown in FIG. 1, and then the movable plate 23 is lowered. When the used original plate is sucked by the suction cups 25 and 26, the movable plate 23 is raised and returned to the position shown in the figure.

Next, the used original plate pallet 10A is pulled out from its standby position to the draw-out position by the pallet moving mechanism 45, as described above. And movable plate 2
3 is lowered, the used original plate held by the suction cups 25, 26 is brought into the pallet 10A, the vacuum of the suction cups 25, 26 is broken, and the original plate is stored therein. At the same time as returning the movable plate 23 to the position shown in FIG.
The holding film 101 to which the test pattern film 100 is attached, which has been returned to the standby position P, is returned to the standby position by a distance L in the direction of the arrow Y in FIG.
7L and reversible motor 107R are simultaneously driven. Here L>l ₀
...(a), 4L<l...(b) are necessary. Condition (a) is to ensure that the test patterns do not overlap in each color plate that is printed one after another, and condition (b) is to prevent the test patterns from overlapping each other in each color plate that is printed one after another. This is to prevent the test patterns of the first color and the fourth color from overlapping each other when creating the test patterns.

The above-mentioned Y is only a certain length L of the holding film 101.
For movement in this direction, a rotary encoder is attached to a reversible motor 107R that rotates a pulley 103R that feeds out the film 101, and a signal from this encoder determines the amount fed out from the pulley 103R on the drive shaft. 105
A constant tension is applied to the holding film 1 by the torque motor 107L of the pulley 103L which is simultaneously driven.
01. Then, when the test pattern is fed out by a certain length L, that is, the test pattern is moved a distance L in the Y direction, the motor 107R stops, and at the same time, the electromagnetic brake built into this motor is activated, and the motor 107R is moved to the stop position. Test patterns are now preserved.

Then, each of the above-mentioned operations is sequentially repeated, and the original image,
The printing of both test patterns onto the four printing plates is completed. And test pattern film 100
The holding film 101 with
When the pulley 103R moves in the opposite direction to the above direction against the torque of the torque motor 107L, the reversible motor 107R is driven.
Holding film 101 is attached to pulley 103R by a length of 4L so that the test pattern returns to the initial position.
Wind it up.

The above has been explained using the case of printing an A2 size printing plate as an example, but when printing a B2 size printing plate, the holding film 101 is held in the Q position and a four-color printing plate is printed. If so, each operation may be repeated four times in the same manner as described above. Needless to say, when printing a printing plate with a maximum of six colors, the condition (b) is 6L<l.

In the above, we have explained how to use this device to print on printing plates of two sizes (A2 and B2), but if you need to print on printing plates of three or more sizes, the test pattern film 1
In order to position the holding film 101 to which 00 is pasted to a predetermined holding position in addition to the above-mentioned Q position and R position, the air cylinders 109 and 109' are replaced with a linear drive mechanism that allows easy stroke adjustment, such as a simple linear drive mechanism. A linear head in combination with a pinion may be used.

In addition, the holding film 10 in this embodiment device
1, a transparent thin plate 101' shown in FIG.
It is also possible to print the test pattern in the same manner as described above by using a .

As is clear from the above description, the printing apparatus according to the present invention automatically processes all the printing of test patterns onto printing plates, which was conventionally done manually, including related work, accurately and speedily. This makes it possible to do this, and greatly contributes to saving labor and speeding up the entire plate-making process.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the present invention with the side plate removed, FIG. 2 is a plan view showing the arrangement of its main parts, and FIG. 3 is a plan view of an example of a pallet. FIG. 4 is a front view showing the configuration of the panel moving mechanism in partial cross section, FIG. 5 is a partial plan view of the test pattern film, and FIG. 6 is an enlarged view of two examples of test patterns printed on the test pattern film. FIG. 7 is a partial plan view in which only the vicinity of the exposure section shown in FIG. 2 is enlarged, and FIG. 8 is an enlarged external front view of FIG.
FIG. 9 is a partial sectional view of the - section of FIG. 7 viewed in the direction of the arrow, FIG. 10 is a partial external side view of FIG. 7 viewed from the direction of thick arrow B with the rail removed;
FIG. 11 is a partial perspective view of FIG. 10, and FIG. 12 is a schematic illustration of another embodiment of the device according to the present invention. 10A... Pallet for collecting used original plates, 10B...
...Original plate storage pallet, 10C, 10D, 10E
...Pallet for storing sensitive material sheets by size, 11...
...Guide rail, 12...Exposure section, 13, 13'
... Guide member, 14 ... Connection member, 15 ... Transparent glass plate, 16 ... Carrier, 23 ... Movable plate,
25, 26, 30...Suction cup, 100...Test pattern film, 101...Holding film (belt-shaped transparent film), 102L, 102R...
Guide roller, 103L, 103R...pulley,
104L, 104R...Guide frame, 109,1
09'...Air cylinder.

Claims (1)

[Claims] 1 One or more pallets each separately storing original plates, used original plates, and photosensitive material sheets classified by size corresponding to the original plates, and a standby position for these pallets and a pallet immediately above the exposure area provided adjacent to the standby position. a guide rail installed between the pull-out position and engaged with a guide member attached to each of the pallets for original plates, used original plates, and size-specific sensitive material sheets; a pallet moving mechanism that selectively reciprocates a pallet between its standby position and its pull-out position; In a printing apparatus comprising a movable plate that moves up and down between the top surface of the exposure section and a carrier equipped with a suction cup, a belt-shaped transparent film provided with a test pattern is placed close to the original plate set surface of the exposure section. A printing apparatus comprising a moving mechanism for reciprocating the film from a position outside a pallet standby position to a position inside the exposure section in the same direction as the palette drawing direction, and a moving mechanism for moving the film in a direction perpendicular to the palette drawing direction.