JPH0289057A - Contact exposing device - Google Patents

Abstract

PURPOSE:To simply and surely execute the image formation having a high gradation property by a daylight operation by holding a photosensitive material placing table in a position in which it does not come into contact with the light shielding curtain surface at the time of replacing an original, and inserting a light shielding curtain between an original platen and the photosensitive material placing table. CONSTITUTION:When at least one sheet of original is brought to single exposure or multiple exposure against a photosensitive material by an exposing part, a photosensitive material placing table 201 is held in a position in which it does not come into contact with at least the light shielding curtain 240 surface at the time of replacing the original, so that the light shielding curtain 240 can be inserted between an original platen 140 and the photosensitive material placing table 201. Also, the light shielding curtain 240 is placed on plural rods 249 whose both ends are fixed axially to a link attachment 247 of a roller chain 246, the front end and the rear end of the light shielding curtain 240 are fixed to the respective corresponding rods 249A, 249B, and opening/closing driving of the light shielding curtain 240 is executed by running of the roller chain 246. In such a way, the image formation having a high gradation property can be executed simply and surely by a daylight operation.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a method for accurately placing color-separated three-print films (hereinafter sometimes referred to as separation mesh originals or separation mesh original films) in predetermined positions. Place each original on a positive or negative type color photosensitive material and expose each original multiple times to make a color image copy with the same color scheme as the print finish.Separate mesh used to create a printing plate.Check directly whether there are any abnormalities in the original. Of the color proofing technologies that are commonly inspected, this relates to exposure equipment. The present invention also 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 realize a compact exposure device, while the latter generally uses a relatively high-intensity light source, In order to achieve parallelism and uniformity of light, the distance from the light source to the exposure surface is large, so the exposure equipment is large.

In the field of printing plate making, from continuous tone images such as reversal film, color negative film, and color paper,
In the process of creating a printing plate consisting of an image made up of halftone dots, a large amount of film is used to separate colors, combine images, etc. Therefore, the work becomes complicated,
Many mistakes occur, such as typos and layout mistakes. 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, lens flare As a result, the gradation reproducibility deteriorated. 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 (color proof) using a color photosensitive material, Chesley F, Ca
The Carlso from rlson Company
n Proofmaster System, Kreo
Co1or Proofing from nite, Inc.
There is a contact exposure method sold under the name System. 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 the photosensitive material has a photosensitive region in the entire visible range, it has the disadvantage that it is impossible to handle it in a bright room, and it is forced to grope around 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 especially important that the separation screen original film and photosensitive material adhere closely to each other to maintain flatness. Therefore, it is necessary to cover the transparent cover sheet and apply vacuum suction inside the covered area to achieve flatness. It is being done. Also, it is desirable that such a series of processes, except for the regular exposure process, be performed in a bright room rather than in a dark room. Therefore, when the original is being exchanged and set in a bright room, the photosensitive material must be automatically and reliably shielded from light by a light shielding means, and the set position must be kept shielded from light without moving. This is extremely difficult.

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

[Means to solve the problem]

The purpose of this is to have a document table with a movable light-shielding curtain in the opening, which is movable up and down, and which can be fitted into the opening, so that the document and photosensitive material come into close contact with each other at the top position and the photosensitive material is conveyed at the bottom position. In a contact exposure apparatus having a material mounting table, when at least one document is exposed once or multiple times to the photosensitive material by an exposure unit, the sensitive material mounting table does not touch at least the light-shielding curtain when exchanging the document. The light shielding curtain is placed on a plurality of rods whose ends are pivoted to link attachments of a roller chain. The front and rear ends of the light-shielding curtain are fixed to corresponding rods, respectively, and the opening and closing of the light-shielding curtain is achieved by a contact exposure device characterized in that the roller chain runs.

〔Example〕

A front view in FIG. 1, a side view in FIG.
1st! ff, 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. However, the present invention is not limited to this example.

The color proofing device uses each separation mesh original film color-separated into 7th edition, 9M edition, 0th edition, and black edition to make sure there are no mistakes in the layout of the original film or if there are any color mistakes before creating the actual printing plate. Proofreading material (to be used to check whether there are any errors or typographical errors, etc., and to check the finish of printed matter in advance)
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 100 has a document table 140 having an upper surface 141 and a lower surface 142 on which document positioning binpers (registration pins) 143 are installed on the upper side of the main body frame 101 supported by legs 102. The light-shielding cover 120 that made it possible to form a dark room as one room is 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. On the outside thereof, there is a shielding plate 308, a rotary lens 312 for operating the shielding plate 308, and an exposure window or slit 3.
10 and a light diffusing plate 328 attached and fixed to the light source side of the slit.

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+qm 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 m+i.

A photosensitive material mounting section 200 is provided inside the main body frame 101 as a second chamber. The sensitive material mounting table 201 is driven by a motor (not shown) and is movable 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 droop and almost maintains its flatness, making it easier to place the document.Furthermore, as mentioned above, the good flatness provides a high light-shielding effect, and the opening There is no need to make the area of the light-shielding curtain so large compared to the area, 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 document table, that is, in the boundary area between the first chamber and the second chamber, so that the light-shielding curtain 240 closes the second chamber where the photosensitive material mounting table 201 is housed. 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 line up at 510 and wait. Then, the tip is further fed to the left end of the fixed base 527 by the holding 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 removed, the traveling head 522 returns to its original position.

Here, solenoids 535 are attached to both sides of the traveling head 522 via brackets 534, and the movable iron core 53
A frame 531 is fixedly attached to 6, and a rad 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 penetrate through a guide hole drilled in the head and frame, and is fixed to the frame in the thrust direction, and is slidable to the head along the hole. 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 lifts up and the photosensitive material is conveyed.

When the photosensitive material is transported and placed on the photosensitive material mounting table 2 in this way, the blower 204A is driven via the flexible hose 205, and suction pressure is applied to the suction hole made 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.

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

Peel off the upper light-shielding cover 120 with the unit, brighten the first room with outside light, and insert the registration bin set on the upper surface 141 (pinper 43) into the disassembled mesh original (one of the black version and MMC, e.g. 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, in a state where the first room with the upper surface of the document table and the tJ2 room with the photosensitive material mounting table have become a common dark room, the photosensitive material mounting table 201 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 depressurizing blower or a vacuum pump, thereby ensuring a high degree of close contact between the transparent cover sheet and the document table.

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, neither squeezing nor exposure is performed, and during the backward movement, the squeeze roller 276 is attached to the bracket. 2
11E movement rotating around the rotation axis of 83/<-282
The movable core of the solenoid 284 acts on the portion 282B of A by energization, and the roller is forced onto the transparent cover sheet 275 to complete the squeeze.

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 sealant 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 registration bin, and the suction decompression effect when suction is applied can be achieved without any trouble. be.

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, either 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 using the nozzle.
06 to the blowing side, blowing air into the flow path groove 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-dense compared to the first 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 in the bin 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 squeeze roller attached to the exposure section 300 is moved back and forth. The polygonal tube 301 is rotated to face the cylindrical surfaces provided on another filter, and scanning contact exposure is performed by moving the exposure section using a second color filter. The second exposure is completed.

Similarly, the third manuscript (black version and one of Y, M, C, e.g. 0 version, or one of Y, M, C, black version, or more than one of these) and its corresponding Exposure using a filter is also performed in the same procedure to complete the third exposure. In this way, exposure is repeated one to several times as necessary.

In addition, when using a blower with strong suction force, substantially the same close plane effect can be obtained even if the squeeze means and the suction means are synchronized.

Finally, the photosensitive material mounting table is lowered to the lowest position, the suction is released to release the photosensitive material, and the clamping o-
? The tip of the photosensitive material is fed into 552 by the movement 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.

Incidentally, as the exposed photosensitive material begins to be conveyed through the development processing section 600 and the photosensitive material mounting table comes down, the subsequent photosensitive material is conveyed onto the photosensitive material mounting 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
Exposure is necessary, but when using a negative color photosensitive material or a solarize-simin 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, diffusion transfer photosensitive materials, etc., it is possible to perform exposure and development using the same system by providing processing baths suitable for each type of photosensitive material. .

Of course, regarding exposure to direct positive photosensitive materials, a black plate is superimposed on each Y plate, 9M 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 0 version and the black version are exposed to light three times using corresponding R filters, but when exposing normal negative color photosensitive materials, each Y, 1M, and C version of the original is placed on the photosensitive material. Exposure three times by overlaying the B filter for the Y version, G for the M version, and R filter for the 0 version.Fourth time, overlap the black version and apply an ND filter, if necessary, for color correction. Expose by matching color filters or perform triple exposure of B, G, and H.

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 B, G, and H colored light or exposing using a combination of filters may be performed. Similarly, in order to reproduce colors suitable for special inks other than standard inks such as Y, M, C, and black, which are generally called spot 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 film called a special color film, or to combine the decomposition film for special colors with other films, and in some cases, it is necessary to perform contact printing with several sheets of other decomposition film films stacked one on top of the other. There is.

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 3
A plurality of light source lamps 302 of the 00 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 flatness of the light-shielding curtain has been significantly improved, and the light-shielding effect can now be easily and reliably realized. Therefore, the contact exposure device and the color proofing device equipped with the same can be operated in a bright room and are compact. Furthermore, the reproducibility of halftone dots, that is, the gradation of the image, in the contact multiple exposure of each separation mesh original film to the photosensitive material is improved. As a result, it has become possible to quickly form images on color photosensitive materials that are similar to printed materials, to enable accurate inspection of manuscripts, and to create high-quality posters using photosensitive materials.

[Brief explanation of drawings]

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 2. 100...Color proof creation device main body 120...
Light shielding cover 121...Hinge 124...Plate 140...Original table 143...Registration pin (bin bar) 144...Window (opening) 240...
・Shading curtains 241.242A, 243.245...Chain sprocket 246...Roller chain 247...Link attachment

Claims (1)

[Claims] A document table having a movable light-shielding curtain in an opening, and a photosensitive material mounting table which 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 conveyed at the bottom position. In the contact exposure apparatus, when at least one original is exposed once or multiple times to the photosensitive material by the exposure unit, the photosensitive material mounting table is placed on standby at a position where it does not touch at least the light-shielding curtain when exchanging the original. The light-shielding curtain can be inserted between the document table and the photosensitive material mounting table, and the light-shielding curtain is placed on a plurality of rods having both ends pivoted to link attachments of a roller chain. A contact exposure apparatus characterized in that the front end and the rear end of the light-shielding curtain are fixed to corresponding rods, and the opening and closing of the light-shielding curtain is performed by running the roller chain.