JPH0289058A - Contact exposing device - Google Patents

Abstract

PURPOSE:To simply and surely execute the image formation having a high gradation property by a bright chamber operation by overlapping a cover sheet, an original and a photosensitive material at the time of setting the original and operating squeeze means from an original reference positioning pin side, and thereafter, operating a contact means by suction and executing an exposure. CONSTITUTION:On original platen 141, 142, a transparent cover sheet member 275, a squeeze means 276 and an original reference positioning pin 143 are provided. In this state, at the time of setting each original at the time when at least one sheet of the original is brought to single exposure or multiple exposure against a photosensitive material by an exposing part 300, a cover sheet 275, the original and the photosensitive material are overlapped and the squeeze means 276 if operated from the original reference positioning pin 143 side, and thereafter, a contact means 523 is operated by suction, and also, controlled so as to execute an exposure. In such a way, the image formation having a high gradation property can be executed simply and surely by a bright chamber operation.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to each color-separated printing original film (hereinafter sometimes referred to as a separation mesh original film or a separation mesh original film).
is accurately placed in a predetermined position and exposed multiple times to a positive or negative type color photosensitive material, once for each original, to create a color image copy with the same color scheme as the printed finish. This paper relates to exposure equipment, which is part of the color proofing technology that directly inspects gK manuscripts for abnormalities. Also,
The present invention relates to an exposure apparatus for creating a poster using a color photosensitive material using the separation mesh original.

[Conventional technology]

Conventionally, exposure devices have two methods: one method is to irradiate light source light onto the document surface and form an image on the photosensitive material using a projection lens that has the function of enlarging, reducing, or equal magnification, and the other method is to overlap the document and photosensitive material and irradiate the light source light. There is a method of contact exposure.

Furthermore, there are two methods of irradiating light from a light source: scanning exposure and static exposure. The former uses a relatively small light source to create a compact exposure device, while the latter generally uses a relatively high-brightness light source and In order to achieve parallelism and uniformity, there is a distance from the light source to the exposure surface, which results in a dusty exposure device.

In the field of printing plate making, a large amount of film is used in the process of creating printing plates consisting of images consisting of halftone dots from continuous tone images such as Lino, color negative film, and color paper. So, sorting the colors,
Performs image compositing, etc. As a result, the work becomes complicated and a large number of mistakes occur, such as mistakes in characters and layout. Furthermore, since the client (orderer) requests changes in text such as prices, layout changes, color changes, etc., it is easy to forget to make changes. It is also necessary to check in advance whether the printed matter will be finished in the desired color tone and gradation. These are collectively called proofreading.

For this reason, various systems including trial printing called proof printing have been announced and sold for the purpose of these checks. Examples include those using CRT, those using non-silver salt photosensitive materials such as photopolymer diazo, those using dry toner, and electrophotographic methods. However, these calibration systems generally require a long time to calibrate one sheet, and have problems such as high material cost and poor workability, and have not been a system that is sufficient for practical use.

On the other hand, as another method of obtaining a proof, there is a method of printing a separation mesh original onto a color photosensitive material using color-separated light. For example, JP-A-62-280746, JP-A No. 62-28074
No. 7, No. 62-280748, No. 62-280749
No. 62-280750, No. 62-280849, No. 60-42760, etc., describe a method of obtaining a calibration material on a color photosensitive material using a photographing system using a projection lens. Although these devices are large, they are so-called "bright room specifications" that allow work to be carried out in a normal room, and the exposure operation can be performed in a dark room while the photosensitive material itself remains inside the device. Therefore, it is possible to easily perform color calibration in a short time and at low cost, and it has better characteristics than other calibration systems.However, since it is a photographic system, the lens 7 The influence of flare etc. occurred, and deterioration was seen in terms of gradation reproducibility.That is, due to flare etc., the small dots of the screen tended to fly and the large dots tended to collapse.

On the other hand, as another method of similarly obtaining a proof material (color proof) using a color photosensitive material, Chesley F, Ca
The Carlso from rlson Company
n Proofmaster System, Kreo
Co1or Proofing from niLe, Inc.
There is a contact exposure method sold under the name SysLem. These methods involve exposing a color light-sensitive material to a separation mesh original in direct contact with the light-sensitive material, so they are greatly improved in terms of gradation reproducibility compared to photographic methods. On the other hand, since color photosensitive materials have a photosensitive region in the entire visible range, they have the disadvantage that they cannot be handled in a bright room and are forced to be groped for work in a dark room.

[Problem to be solved by the invention]

As mentioned above, the close-contact method has better gradation reproducibility for separated mesh originals than the photographing method.

Achieving this with static exposure requires a large light source device, which requires a large installation space and is difficult to handle. If the entire surface is exposed by scanning the slit light in such a way that the entire image forming area to be closely exposed is uniformly exposed, the light source can be made smaller.

Normally, in a scanning exposure apparatus such as a copier, parallelism and uniformity of light are not so important.

On the other hand, reproduction of halftone gradation is an important problem in an apparatus for creating a color proof using a separated halftone original in the field of printing plate making. If small dots are skipped or large dots are crushed, it becomes difficult to fully understand the gradation of the resolution screen original on the proof material, and it becomes necessary to check it again on the film, which is time consuming. Not only does this cause problems, but it also becomes extremely difficult to grasp accurate gradation reproducibility and color reproducibility due to color mixture.

Furthermore, when exposing a negative separation mesh original onto a negative color photosensitive material, it is sufficient to attach one sheet of original film to the photosensitive material, but when exposing a positive separation mesh original onto a positive color photosensitive material, At least one color version (Y, M, C version)
It is necessary to attach a total of two pieces of decomposition film, one black and one black, to the photosensitive material.

Therefore, one of the two decomposition mesh films is exposed to the photosensitive material through the base thickness of one film. Furthermore, in the case of exposing positive separation mesh films for printed matter that are simultaneously printed with special inks called spot colors, it is necessary to simultaneously overlap and expose two or more separation mesh films. In these systems, the parallelism and uniformity of light greatly affect image reproducibility, and if these are insufficient, sufficient image reproducibility cannot be obtained even with close exposure, and partial fogging may occur. This may cause deterioration in image quality, such as . In addition, it is most important that the separation screen original film and photosensitive material are in close contact with each other to maintain flatness. Therefore, it is necessary to cover the covered area with a transparent cover sheet and apply vacuum suction inside the covered area to achieve flatness. is being carried out. However, it is not easy to cover the transparent cover sheet without wrinkles. It is a very difficult task even if a person squeezes it by hand.

Particularly, as shown in FIG. 7, when the photosensitive material mounting table 2 is on standby, the document hangs down on the photosensitive material placing table 2 and is partially in contact with the photosensitive material. Here, if the original sticks to the cover sheet or photosensitive material due to static electricity, etc., as shown in Figure 8, when the photosensitive material mounting table rises to the exposure position, a slack will form near the original reference positioning pin, resulting in color shift. This may cause pin hole damage.

The present invention solves the above-mentioned problems and provides a small-sized contact exposure apparatus that can form images with high halftone reproducibility, that is, high gradation, on IIIJ originals, and is easy and reliable to operate in a bright room. Make it a purpose.

[Means to solve the problem]

The purpose of this is to use a document table that has a movable light-shielding member in the opening, is movable up and down, and can be fitted into the opening, so that the document and photosensitive material are brought into close contact with each other at the top position and the photosensitive material is transported at the bottom position. A contact exposure device having a material mounting table, the document table is provided with a transparent cover sheet member, a squeeze means, and a document reference positioning pin, and the exposing unit exposes at least one document to the photosensitive material once or multiple times. When setting each document for exposure, after the cover sheet, the document, and the photosensitive material are stacked, the squeeze means is operated from the document reference positioning pin side, and then the close contact means by suction is operated to perform further exposure. This is achieved by a contact exposure apparatus characterized by the following.

〔Example〕

A front view in FIG. 1, a side view in FIG.
This will be explained with reference to a top view of FIG. 3, a partial sectional view of FIG. 4, a sectional view of the exposure section and squeeze roller section of FIG. 5, and FIG. 6, which is a partially enlarged view of FIG. 2. However, the present invention is not limited to this example.

Before creating the actual printing plate using each color-separated original film that has been separated into Y, M, 0, and black versions, the color proofing device checks whether there are any errors in the layout of the original film or if there are any color errors. Proofreading materials are used to check the quality of printed materials in advance by inspecting for typographical errors and typographical errors.
This is an apparatus for obtaining a color proof), in which one or several sheets of the decomposition film are positioned, overlaid on a color photosensitive material, and subjected to multiple contact exposure to create a proof material (color proof) using the color photosensitive material. This makes it possible to discover errors in the separated screen original, check the print finish in advance, and redo the corrections made to the separated screen original.

The main body part 100 has a document positioning pin bar (registration pin) on the upper side of the main body frame 101 supported by leg parts 102! It has a document table 140 having an upper surface 141 and a lower surface 142 on which a document 43 is placed, and a light-shielding cover 120 that makes it possible to form a dark room as a first chamber is mounted on the hinge 1.
21 and a gas damper 122 so that it can be opened and closed.

Further, an exposure section 300 for scanning and exposing the contact exposure surface of the document table is provided in the first chamber. At the center of the exposure section, one or more (three in this embodiment) tubular light source lamps 302A are installed.
, 302B, and 302C are provided surrounded by a drum-shaped internal reflecting mirror 306 fixed to a housing 316 and a transmission window 304. A polygonal cylinder 301 is rotatably provided on the outside thereof, with filters such as B, G, R, ND, etc. arranged on each cylinder surface concentrically at the center, and the filter surface and the transmission window are arranged on the contact exposure surface. It is designed to face. Then, there is a shielding plate 308 on the outside and a-
A light window or slit 310 and a light diffusing plate 32 attached and fixed to the light source side of the slit.
8 is provided.

The exposure section 300 can run on the rails 317A and 317B for scanning. The reciprocating motion is driven by a part 324A of the link of the roller chain 324 held between the chain sprockets 321 and 322 by the housing 316.
This is done by combining the two.

Therefore, it is necessary to suppress the influence of the diffused light as much as possible by narrowing down the light that has been made uniform by the light diffusing plate using a slit. Therefore, the light diffusing plate must always be located on the opposite side of the photosensitive material with respect to the slit. Further, the light diffusing plate may be held in contact with the slit or may be held apart from the slit, but it is preferable to keep a certain distance from the photosensitive material.

A preferable distance between the diffuser plate and the photosensitive material is 30+m or more. The slit is preferably thinner in order to suppress the influence of diffused light, and the preferred slit width is less than 30 mm.

A photosensitive material mounting section 200 is provided inside the main body frame 101 as a second chamber. And the sensitive material mounting table 201 is
Although not shown, it is driven by a motor so that it can move up and down.

On the other hand, as shown in FIG. 2 and FIG. 6, which is a partially enlarged view of FIG.
It is held on both sides by a link attachment 247 of 46 and placed on rods 249 provided at equal intervals, and the front and rear ends of the curtains are attached with adhesive to the leading rod 249A and trailing rod 249B of the rods, respectively. or screw 24
It is fixed with 9C. Incidentally, in this example, the light-shielding curtain used was one whose core material was Tetron cloth and whose surface was coated with nitrile rubber resin. This light-shielding curtain has a slight elasticity and sufficiently absorbs the phenomenon that the curtain trajectory becomes slightly longer while passing through the sprocket 241, thereby making the operation smooth. The light shielding curtain 240 has an area that is at least larger than the cross section of the moving area of the photosensitive material mounting table.

In this embodiment, as described above, the light shielding curtain 240 is held by many rods 249 to shield and close the opening 144. Therefore, the light-shielding curtain does not sag and almost maintains its flatness, allowing you to view the original! The installation work becomes easier, and furthermore, as mentioned above, the light shielding effect is high because of the good flatness, and there is no need to make the area of the light shield curtain so large compared to the area of the opening, and complete light shielding is maintained.

and tin rockets 241.242A, 243.244
The window (opening) 144 when the photosensitive material mounting table 201 is inserted into the document table 140 is opened or closed by reciprocating the roller chain 246 which is hung and driven by a motor (not shown). becomes possible.

Such a light-shielding curtain 240 runs on a surface slightly lower than the lower surface 142 of the GG table, that is, the boundary area between the first chamber and the second chamber, so that the second chamber in which the photosensitive material mounting table 201 is housed is closed. The first chamber is provided so as to be able to switch between forming and releasing light tightness to the first chamber.

Further, a long roll 402 of silver halide color photosensitive material is loaded into a magazine 401 to form a photosensitive material loading section 400, the leading end of the long roll of photosensitive material is sent out by a nipping roller 511, and the leading end is placed in a cutter section. They are lined up in 5,100 locations and are on standby. Then, the tip is further fed to the left end of the fixed base 527 by the pinching roller 511, the tip is sucked by the suction cup 523, and the traveling head 522 having the suction cup guides the rollers 525 and 526 to the traveling rails 521 on both sides. The measuring device moves to a position where a predetermined length of the photosensitive material is measured and stops. The photosensitive material is cut by the cutter section 510 and further moved so that the leading end of the photosensitive material is located at a predetermined position on the photosensitive material mounting table 201. After the suction of the suction cup of the traveling head is cut off, the traveling rod 522 returns to its original position.

Here, the traveling rad 522 has solenoids 535 attached to both sides via brackets 534, and its movable iron core 53
A frame 531 is fixed to 6, and the traveling head 522,
A suction cup 5 coupled to the hose 524 on the frame 531
23 is attached, and a holding pipe 537 of the suction cup is provided to pass through a guide hole bored in the head and frame, and is fixed to the frame in the thrust direction, and is slidable along the hole to the head. It floats above the exposure table surface via a helical spring 532 inserted between the traveling head 522 and a frame 531. When the solenoid is energized and the suction valve is opened, the suction cup descends to attract the photosensitive material, and then, when the solenoid is de-energized, the suction cup is lifted up and the photosensitive material is conveyed.

When the photosensitive material is transported and placed on the photosensitive material mounting table 201 in this manner, the blower 204A is driven via the flexible hose 205, and suction pressure is applied to the suction hole formed on the photosensitive material placing table. As a result, the photosensitive material is tightly fixed onto the photosensitive material mounting table.

This tightly fixed state is maintained until multiple exposures are completed and the photosensitive material begins to be transported to the developing section.

In addition, in the closed state, the light-shielding curtain 240 is in a light-shielding position, so that the second chamber where the photosensitive material mounting table is located remains in a state where a dark room is formed.

Here, the upper light-shielding cover 120 is peeled off, the first chamber is illuminated with external light, and a registration pin (bin bar) 143 set on the upper surface part 141 is attached to the disassembled mesh original (black version and MMC).
One of them, for example, the Y version, or Y.

A reference hole for M, C, or black (or a plurality of them) is inserted, and most of the original is placed on the light-shielding curtain made up of the light-shielding curtain 240 and the rod 249 that holds it. Leave it in place.

In this state, the light-shielding cover 120 is closed to make the first room dark and light-tight, and after the light-sensitive material mounting table is raised slightly below the light-shielding curtain, the light-shielding curtain is moved to open it. Then, while the first room with the upper surface of the document table and the second room with the photosensitive material mounting table become a common dark room, the photosensitive material TC placement table 01 is raised to match the exposure surface, that is, the separation screen original reference surface. At this time, the second
An airtight gasket 201c provided on the abutting surface 201b around the photosensitive material mounting table in the chamber is attached to the lower surface 1 of the document table 140 in the first chamber.
42 and into which the photosensitive material mounting table fits into the opening 144.
The gap created by 01d forms a suction channel groove 204, and airtightness is maintained between the document table surface, the photosensitive material mounting table surface, and the document and photosensitive material sandwiched between the transparent cover sheet.

That is, one end of the transparent cover sheet 275 is fixed to the plate 124 of the light-shielding cover 120, which is removably provided near the opening when opening and closing the light-shielding cover 120, and the other end is fixed to the hinge 1.
Tension member 27 provided in the first chamber below 21
It is fixed at 7.

This tension member may be a simple spring, but in this embodiment, a torsion bar is fixedly provided, and a cover sheet is wrapped around it one turn and fixed.

The torsion bar is biased by a torque spring in a direction in which the cover sheet is rolled up.

By doing this, it is possible to absorb the phenomenon that the straight line distance between the fixing positions at both ends of the transparent cover sheet is geometrically different when the light-shielding cover 120 is opened and closed, or in the middle of the process, and the cover sheet is always fixed. It is possible to maintain a state in which the tension is uniformly and properly applied in a nearly flat state.

When the light-shielding cover 120 is closed with such a transparent cover sheet set, both ends of the cover sheet are at a position slightly lower than the surface of the document table, so it is inevitable that the document on which the document screen film and photosensitive material are placed will be exposed. The transparent cover sheet is now pressed against the table and the surface of the photosensitive material mounting table.

In this state, the squeeze roller 276 squeezes and removes the air between the transparent cover sheet and the document table using a decompression blower or a vacuum pump, thereby ensuring a highly flat and close contact state.

In this embodiment, the squeeze roller is provided in the exposure section 300, and when the light-shielding cover 120 is covered, the exposure section 300 moves back and forth. During the forward movement, no squeezing or exposure is performed, and during the backward movement, the squeeze roller 276 is attached to the bracket 2.
The movable core of the solenoid 284 acts on the portion 282B of the drive lever 282A which rotates around the rotation axis 83 by energization, and the roller is forced onto the transparent cover sheet 275 to complete the squeeze.

In this embodiment, since the home position of the exposure unit 300 is on the opposite side of the document table where the document positioning pin 143 is provided, by starting the squeeze during the return movement, the squeeze can be performed from the pin side. did. Of course, if the home positions of the positioning pin 143 and the exposure section 300 are on the same side, the squeeze starts when the exposure section moves forward.

When the roller 276 is not being squeezed, it is de-energized, the solenoid is not activated, and the spring 286 is activated so that the squeeze roller is raised above the document placement surface or the document table surface.

A window is opened in the transparent cover sheet 275 near the area where it touches the registration pin 143, and a stretchable rubber sheet 278 as shown in FIG. It's broken.

Then, when the transparent cover sheet 275 is covered, the surface of the cover sheet is prevented from being deformed or torn by the register storage eye pins, and the suction decompression effect when suction is applied can be achieved sufficiently without any trouble. It is.

Also, cleaning the transparent cover sheet 275 is important, and the plate 124 to which one end of the sheet is fixed is attached to the light shielding cover 120
This makes it easy to wipe off dirt on the front and back surfaces by removing it from the camera.

Furthermore, when opening and closing the light-shielding cover, both ends of the gas spring 122 are connected to the bracket 126 of the main body and the bracket 1 of the light-shielding cover.
27, so that it can be operated smoothly and lightly.

In any case, when the squeeze is completed, the proa 206 as a depressurizing device operates, and the photosensitive material is suctioned through the channel groove 204 via the suction hose 207 connected to the suction hole 201f formed in the photosensitive material mounting table 201. The air present between the upper surface of the placing table and document table and the cover sheet is sucked, and the photosensitive material, each document, and the cover sheet are stacked and held in close contact with each other in a planar shape. However, the suction hole 201f
may be a hole drilled in the original table.

At this time, as shown in FIG.
The dimensional relationship between the abutting surface 201b, the airtight packing 201c attached thereto, and the lower surface 142 of the document table 140 is adjusted so that the upper surface 201a of the photosensitive material mounting table 201 is on the same plane. By doing this, air can flow smoothly between the transparent cover sheet, the document table and the photosensitive material mounting table through the flow channel grooves, and the cover sheet, the document and the photosensitive material can be placed in the correct planar shape. This results in stable adhesion. Further, the sensitive material mounting table may be located at a slightly lower position than the document table.

In this state, the exposure section 300 is moved again to the guide rail 31.
7A and 317B to perform scanning exposure, and the first color exposure using the filter is completed. Of course, at this time, the squeeze roller 276 is de-energized and floats to prevent it from interfering with the exposure.

Next, in order to perform a second image exposure using a filter of a different color, the photosensitive material mounting table is lowered to a position slightly below the travel path of the light-shielding curtain, and air is blown there with a nozzle, or the above-mentioned professional 2
06 to the blowing side, blowing air into the flow path @204, and closing the light shielding curtain, the original and the photosensitive material can be easily and completely separated. The order of blowing with the proa and lowering of the photosensitive material mounting table may be reversed or may be performed simultaneously.

When the light-shielding cover 120 is opened, the first room becomes a bright room, but the second room is light-tight compared to the VGL room, forming a dark room.

At the same time, the transparent cover sheet 275, whose one end is fixed to the light-shielding cover 120, is lifted diagonally upward as the light-shielding cover is opened, and the next document film can be easily loaded.

In this state, register the second original (black version and one of Y, M, C, for example, M version, or one of Y, M, C, black version, or multiple sheets of these). After setting it on the pin and covering it with a light-shielding cover, open the light-shielding curtain and raise the photosensitive material mounting table to the surface of the document table. The transparent cover sheet is automatically covered again, and then the exposure section 300
Squeeze is performed by reciprocating the squeeze roller attached to the sheet (in the example, the roller is raised in the forward movement and squeezed in the backward movement), and a squeegee is applied to bring each sheet into close contact with each other to form the polygonal tube 301. Turn the cylindrical surface of another filter to face it, and perform scanning contact exposure by moving the exposure area using the second color filter, completing the second exposure.Similarly, the third original (black plate and Y For example, C version of , M, C, or any one of Y, M, C4!I version
(or more than one of these) and 1: The same procedure is followed for exposure using the corresponding filter, completing the third exposure. In this way, exposure is repeated one to several times as necessary.

Finally, the photosensitive material mounting table is lowered to the lowest position, the adhesion of the photosensitive material is released by releasing the suction, and the tip of the photosensitive material is fed to the nipping roller 552 by the running of the suction cup 523.

The photosensitive material whose leading end has reached the nipping roller 552 is sent to the developing processing section 600 on the left. When using an internal latent image type direct positive sensitive material, a color developing tank 60
1, fog exposure is applied by the second exposure section 350. The photosensitive material then passes through a bleach-fixing tank and a stabilizing tank, is dried while being transported to a drying section 680, and is collected at the left end of the apparatus after being developed.

It should be noted that the exposed photosensitive material begins to be conveyed through the development processing section 600, and as the photosensitive material 11t is placed on the placing table, the following photosensitive material is conveyed onto the photosensitive material placing table 201, and is measured and measured by the cutter section 510. The process of cutting and closely setting is repeated as described above.

When using an internal latent image type direct positive, the photosensitive material is the second
s! Although light is required, when using a negative color photosensitive material or a solarization type direct positive photosensitive material, the second exposure is not necessary and the light is left off. In addition, when using other dye-bleached color photosensitive materials, color reversal photosensitive materials, diffusion transfer photosensitive materials, etc., it is possible to perform exposure and development processing in the same system by providing processing baths suitable for each type of material. .

Of course, for exposure to direct positive photosensitive materials, a black plate is superimposed on each Y plate, 1M plate, and C plate, and B is used for the Y plate and black plate, G is used for the M plate, and black plate is used. The C plate and the black plate are exposed to light three times using corresponding R filters, but when exposing normal negative color photosensitive materials, each Y plate, 1M plate, and C plate original are placed on the photosensitive material. Layer them individually and expose them three times by layering the B filter for the Y plate, the G filter for the M plate, and the R filter for the C plate.Fourth time, layer the black plate and use an ND filter for color correction if necessary. Exposure is performed using corresponding color filters, or exposure is performed using three color filters: B, G, and R.

Furthermore, if necessary, in addition to the above-mentioned separate color exposures, further exposures using light corresponding to different color separations may be added to produce basic colors suitable for the printing ink. Further, in order to blend light equivalent to different color separations in advance, processing such as blending BGH colored light or exposing using a combination of filters may be performed. Similarly, in order to reproduce colors that are compatible with special inks other than standard inks such as Y, M, C, and black, which are generally called special colors, repeated exposure, blending of colored light, or combination of filters may be performed. In this case, depending on the case,
It is necessary to use a decomposition mesh film called a special color plate, or to combine the decomposition film for special colors with other films, and in some cases other decomposition mesh films may also be stacked together and printed in close contact. There is a need.

There are two types of photosensitive materials: those with high sensitivity and those without. When using a photosensitive material with low sensitivity, the exposure area 30
A plurality of light source lamps 302 of the 0 polygonal tube 301 may be provided and a large number of them may be turned on to make the exposure more powerful.

In addition, by using the measures of lowering the scanning speed and the measures of making the opening/closing of the exposure window 310 variable, in combination or alone, it is possible to perform high-quality exposure without worsening the reciprocity law failure condition.

〔Effect of the invention〕

According to the present invention, the contact exposure device and the color proofing device equipped with the same can be operated in a bright room, are compact, and furthermore, the transparent cover sheet and document film can be safely and precisely adhered to the photosensitive material without wrinkles, resulting in flatness. As a result, the reproducibility of halftone dots, that is, the reproducibility of images in close contact multiple exposure of each separation mesh original film to a photosensitive material is improved, and an image similar to that of a printed matter can be quickly formed on a color photosensitive material, allowing accurate document inspection. In addition to this, it became possible to create high-quality posters using photosensitive materials.

[Brief explanation of the drawing]

FIG. 1 is a front view of a color proof production apparatus equipped with an embodiment of the contact exposure apparatus of the present invention. FIG. 2 is a side view of a color proof production device equipped with an embodiment of the contact exposure device of the present invention. FIG. 3 is a top view of the contact exposure apparatus shown in FIG. 2. FIG. 4 is a side sectional view showing the positional relationship between the document table and the photosensitive material mounting table. FIG. 5 is a sectional view of the exposure section and squeeze roller section. Figure 6 is a partially enlarged view of Figure 'fJ2. FIG. 7 is a diagram showing the state of the cover sheet and original document at the standby position of the photosensitive material mounting table. Diagram M8 is a state diagram where the cover sheet and original document are sagging before being squeezed. 100...Color proof creation device body +20...
Light shielding cover 121...Hinge 124...Plate 140...Original table 143...Registration pin (pin bar) 144...Window (opening) 201...
...Sensitive material mounting table 240...Shading curtain 275...Transparent cover sheet 276...Squeeze roller 277...Tension member (torsion bar) 284
... Solenoid 282A ... Drive lever 3
00...Exposed part

Claims (1)

[Claims] a document table having a movable light-shielding member in an opening; a photosensitive material mounting table that is vertically movable and can be fitted into the opening so that the document and photosensitive material are brought into close contact with each other at the uppermost position and the photosensitive material is conveyed at the lowermost position; A contact exposure device having a transparent cover sheet member, a squeeze means, and a document reference positioning pin are provided on the document table, and when exposing at least one document to the photosensitive material once or multiple times by an exposure section When each document is set, after the cover sheet, the document, and the photosensitive material are overlapped, the squeeze means is activated from the document reference positioning pin side, and then the suction-based contact means is activated to perform further exposure. Close-contact exposure equipment.