JP2704262B2 - Color proof creation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of precisely placing each separation net document having been subjected to separation exposure and development development at a predetermined position and placing one on a positive color or negative color photosensitive material for each document. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exposure apparatus, which is a technique for directly inspecting the presence or absence of an abnormality in a separation net document for preparing a printing plate by making a color image copy having the same coloration as a print finish by performing multiple exposures each time. Further, the present invention relates to an exposure apparatus for producing a poster using a color photosensitive material by using the separated net document.

[Conventional technology]

Conventionally, an exposure device irradiates a light source light onto a document surface and enlarges it.
There are a method of forming an image on a photosensitive material with a projection lens having a function of reduction or equal magnification, and a method of overlapping a document and the photosensitive material and irradiating light with light from a light source to perform contact exposure.

In addition, there are scanning exposure and static exposure as light source light irradiating means, while the former realizes a compact exposure apparatus with a relatively small light source, while the latter generally uses a relatively high-luminance light source and uses In order to obtain parallelism and uniformity, the distance from the light source to the exposure surface is taken, so that a large-sized exposure apparatus is required.

In the field of plate making, in the process from continuous tone images such as reversal film, color negative film, paper, etc., to printing plates composed of halftone dots, color separation is performed using a large amount of film. , Images and the like. For this reason, the work becomes complicated, and very many mistakes such as incorrect characters and layouts occur. Further, since a change in characters such as a price, a layout change, a color change, and the like from the client (orderer) come in various ways, it is easy to forget to fix it. In addition, the desired color tone,
It is also necessary to check in advance whether the printed matter is finished at the gradation. These are collectively called calibration.

Therefore, various systems other than test printing called proof printing have been announced and sold for the purpose of confirming these.
For example, a method using a CRT, a method using a non-silver salt photosensitive material such as a photopolymer or diazo, a method using a dry toner to form an image, and an electrophotographic method are used. However, these calibration systems generally take a long time to raise one sheet of calibration, and have problems such as high material costs and poor workability, and cannot be a practically sufficient system.

On the other hand, as another method for obtaining a proof, there is a method in which a separation net document is printed on a color photosensitive material using color separation light.
For example, JP-A Nos. 62-280746, 62-280747, 62-28
No. 0748, No. 62-280749, No. 62-280750, No. 62-2808
No. 49, No. 60-42760 and the like describe a method of obtaining a calibration material on a color photosensitive material in a photographic system using a projection lens. These are large devices, but they are so-called "light room specifications" that can be used in a normal room, and the exposure operation is performed in a dark room while the photosensitive material itself is held in the device. It can be performed under normal lighting without any lighting. Therefore, color proofing can be performed easily and inexpensively in a short time, and has characteristics superior to other proofing systems. However, since it is a projection system, the influence of flare of the lens and the like occurs, and deterioration in gradation reproducibility is observed. That is, due to flare or the like, small dots on the net tend to fly and large dots tend to be crushed.

On the other hand, another method of similarly obtaining a proof (color proof) from a color light-sensitive material is described in Chesley F. Carlson Co.
mpany from The Carlson Proofmaster System, Kreonite.I
There is a contact exposure type as sold by nc. under the name of Color Proofing System. In these methods, since a separation net original is directly brought into close contact with a color photosensitive material and exposed, the reproducibility of the gradation is greatly improved as compared with the photographing method. On the other hand, since the color photosensitive material has a photosensitive region in the entire visible region, it cannot be handled in a bright room, and has a drawback that a groping operation in a dark room is required.

[Problems to be solved by the invention]

As described above, the contact exposure method is superior to the projection method in terms of the tone reproducibility of a halftone dot document, but a film document and a photographic light-sensitive material (hereinafter sometimes abbreviated as a light-sensitive material or a light-sensitive material). In order to perform contact exposure while maintaining flatness, a transparent parallel plane glass is placed on the film original and the photosensitive material, placed in a pressed state, and exposed from above. However, when such a method is employed, the glass plate is damaged or obstructed by the trouble, so that operation in a dark room is difficult and skill is required, which is not efficient. Further, even if a dark room operation is to be avoided in order to improve operability, as long as a glass plate is used, there is a problem that the apparatus becomes large and the installation space must be large.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a compact color proof forming apparatus for proofreading that can be operated in a bright room.

[Means for solving the problem]

This object is achieved by the following technical means (1) or (2).

(1) A light-shielding member that can open and close the opening of the main body frame to make the main body frame light-shielded, a photosensitive material loading section that loads a long roll of photosensitive material, and the light-shielding member closes the opening of the main body frame. When the photosensitive material is supplied from the photosensitive material loading section, and the photosensitive material having a predetermined length measured and cut into a predetermined length is placed on the photosensitive material mounting table disposed in the main body frame; A light-shielding cover that can be opened and closed in a light room state and a light-shielded state. When the light-shielding cover is closed and the light-shielding member opens the opening of the main body frame, the light-sensitive material mounting table faces the film document surface. The photosensitive material on the photosensitive material mounting table and the film original overlap, and a transparent cover sheet is placed on the film original, and the film original and the photographic photosensitive material are adhered in vacuum through the transparent cover sheet. After, the color proof making apparatus which is characterized in that the contact exposure from the transparent cover sheet side.

(2) The color proof forming apparatus according to (1), wherein the transparent cover sheet is a polyester film having a thickness of 50 to 200 μm.

〔Example〕

An embodiment of the present invention will be described with reference to a front view of FIG. 1, a side view of FIG. 2, and a top view of FIG. However, the present invention is not limited to this embodiment.

The color proof creation system uses the separation screen original films separated into C, M, Y and Black plates before producing a production printing plate. This is a device for obtaining a proof (color proof) for checking the finish of printed matter in advance by checking whether there are any characters or errors in characters. By creating a proof (color proof) using the color photosensitive material by overlaying it on the color photosensitive material and performing multiple contact exposures, you can detect errors in the original document and check the print finish in advance, It is designed to take the action of manuscript correction.

The main body 100 is a main body frame 10 supported by legs 102.
A document table 140 having an upper surface 141 and a lower surface 142 for installing a document positioning pin bar (registration pin) 143 on the upper side of 1 is provided. It is provided in.

The first chamber is provided with an exposure unit 300 for scanning and exposing the contact exposure surface of the document table. One or a plurality (three in this embodiment) of tubular light source lamps 302A and 302
B, 302C is a drum-shaped internal reflecting mirror 306 fixed to a housing 316.
And the transmission window 304. A polygonal cylinder 301 concentrically with the central portion is formed on the outer side of the polygonal cylinder 301 with B, G, R, N
A filter such as D is provided rotatably, and the filter surface and the transmission window face the contact exposure surface. A housing 316 having a shielding plate 308, a solenoid 312 for operating the shielding plate 308, a return spring 314, and an exposure window 310 is provided outside the shielding plate 308. The exposure unit 300 can run on the rails 317A and 317B for scanning.

Inside the body frame 101, as the second chamber,
00 is provided. The photosensitive material mounting table 201 is
It is driven by 14 and can move up and down.

On the other hand, an endless light-shielding curtain belt 242 is hung on rollers 241, 242A, 243, 244 as a light-shielding member, and a half of the length is a complete light-shielding curtain. An exposure window having a size larger than the cross section of the moving area is provided. In such a light shielding member 240,
When the light-shielding curtain belt runs on a surface slightly lower than the document table lower surface 142, that is, a boundary area between the first and second chambers, the light-tightness of the second chamber, in which the photosensitive material mounting table 201 is stored, with respect to the first chamber. Is provided so as to be able to switch between formation and release.

The long roll 402 of the silver halide color light-sensitive material is
01 to form a photosensitive material loading section 400, the leading end of the photosensitive material long roll is sent out by the sandwiching roller 511,
The leading end is aligned with the cutter unit 510 and stands by. Further, the tip is fed to the left end of the fixing table 527 by the holding roller 511, the tip is sucked by the suction cup 523, and the traveling head 522 having the suction cup is guided by the traveling rails 521 on both sides of the rollers 525, 526 and exposed to light. The material moves to a position where a predetermined length of the material is measured and stops. The photosensitive material is provided in a cutter section 51.
The photosensitive material is cut at 0 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 head of the traveling head has been canceled, the traveling head 522 returns to the original position.

Here, the traveling head 522 has solenoids 535 attached to both sides thereof via a bracket 534, a frame 531 is fixed to the movable iron core 536, and the traveling head 522 and the suction plate 523 coupled to the hose 524 are attached to the frame 531. A holding pipe 537 of the suction plate is provided so as to pass through a guide hole formed in the head and the frame, is fixed to the frame in a thrust direction, and is slidably mounted along the hole in the head. Then, it floats from the exposure table surface via a helical spring 532 inserted between the traveling head 522 and the frame 531. When the solenoid is energized and the suction valve is further opened, the suction cup descends to adsorb the photosensitive material, and then the solenoid is de-energized to raise the suction cup and convey the photosensitive material.

When the photosensitive material is conveyed and placed on the photosensitive material mounting table 201 in this manner, suction pressure is applied to the suction holes formed on the photosensitive material mounting table by driving the blower 204A through the flexible hose 205. The photosensitive material is closely fixed on the photosensitive material mounting table. This tightly fixed state is maintained until all the exposures are completed a plurality of times and the photosensitive material starts to be conveyed to the developing section.

In this state, the light shielding curtain 242 is in the light shielding position, so that the second room having the photosensitive material mounting table remains in a state where a dark room is formed.

Here, the first chamber is illuminated with external light by peeling off the upper light-shielding cover 120, and a resist pin (pin bar) 143 set on the upper surface 141 is disassembled into a separation net document (black plate and one of Y, M, C, for example, Y Plate, or one of Y, M, C, and black plates, or some or all of them), and place most of the original on the light-shielding curtain. .

In this state, the light-shielding cover 120 is closed, the first chamber is darkened to make it light-tight, the light-sensitive material mounting table is raised slightly below the light-shielding curtain belt surface, and then the light-shielding curtain belt 242 is moved to open. Then, both the first room having the upper surface of the document table and the second room having the photosensitive material mounting table become a common dark room, and
1 is increased to match the exposure surface, that is, the reference surface of the resolving net document. At this time, the airtight packing 201c provided on the abutting surface around the photosensitive material mounting table in the second room is connected to the lower surface 1 of the document table 140 in the first room.
The gap formed by the fitting surface of the photosensitive material mounting table into the opening forms a suction flow channel 204, and the exposure surface of the exposure table formed by the original table and the photosensitive material mounting table and the transparent cover. Airtightness between the document and the photosensitive material sandwiched between the sheets is maintained.

That is, the transparent cover sheet roll 274 is wound around the shaft 273, the tip of which passes through the squeeze roller 276, and the head 271 of the cover sheet device 270 stopped by the stopper 272 is moved to the rail 281.
A, the cover sheet 2 being unwound from the cover sheet roll 274 by being guided to the right in FIG.
75 is pressed by a spring 278 and is squeezed by a squeeze roller 276 rotatably fixed by a shaft 277, and the original and the photosensitive material are covered by a cover sheet, and when the head reaches the right end, it serves as a decompression device. The blower 206 works and is sucked through the flow channel 204 via the suction hose 207 connected to the suction hole 201f formed in the photosensitive material mounting table 201, and is interposed between the upper surface (exposure surface) of the exposure table and the cover sheet. The air is sucked, and the photosensitive material, each document, and the cover sheet are superimposed and closely held in a planar shape. However, the suction hole
Reference numeral 201f may be a hole formed in the document table.

At this time, as shown in FIG. 4, the abutting surface 201b and the airtight packing attached thereto are so arranged that the upper surface 141 of the original table 140 and the upper surface 201a of the photosensitive material mounting table 201 are flush with the exposure surface of the exposure table. The dimensional relationship between 201c and the lower surface 142 of the document table 140 is adjusted. By doing so, the air flow between the transparent cover sheet, the document table, and the photosensitive material mounting table is smoothly performed from the flow channel, and the cover sheet, the document, and the photosensitive material are formed into a correct planar shape. Is achieved. Further, the photosensitive material mounting table may be located at a position slightly lower than the document table.

Then, in this state, the exposing unit 300 moves the guide rails 317A and 317B.
The scanning exposure is performed by traveling above, and the first color exposure by the filter is completed.

Next, in order to perform the second image exposure with a filter of another color, the cover sheet is returned to the original position, and the photosensitive material mounting table is lowered slightly below the travel path of the light shielding curtain, and air is blown by the nozzle 215, or By switching to the blowout side of the blower 206 and blowing air into the flow passage groove 204 and closing the light shielding curtain, the original and the photosensitive material can be easily and completely separated. The order of blowing the blower and lowering the photosensitive material mounting table may be reversed or simultaneous. When the light-shielding cover 120 is opened, the first room is in a bright room state, but the second room is light-tight and a dark room is formed with respect to the first room.

In this state, the second manuscript (black plate and one of Y, M, C, for example, M plate, or one of Y, M, C, black plate, or some or all of them) After setting it on the resist pins and covering the light-shielding cover, open the light-shielding curtain, raise the photosensitive material mounting table to the document table surface, cover the cover sheet again, apply suction, and adhere each sheet to the polygonal cylinder 30
By turning 1, the cylinder surfaces provided on the other filters are opposed to each other to perform the scanning contact exposure using the second color filter, and the second exposure is completed.

Similarly, a third manuscript (black plate and one of Y, M, and C, for example, C plate, or one of Y, M, C, and black plates, or some or all of them) and Exposure by the opposite filter is performed in the same procedure, and the third exposure is completed. In this way, if necessary, one to several exposures are repeated. The transparent cover sheet used in the present invention is a polyester film having a thickness of 50 μm to 200 μm, preferably a photographic polyester base. When the polyester base is 50 μm or less, the handleability is poor, wrinkles are generated, and the vacuum adhesion is likely to be incomplete.

Further, since a polyester base having a thickness of 200 μm or more lacks flexibility, the apparatus tends to be large like a glass plate, and there is a danger of falling down. Once rolling occurs, unevenness in the amount of light or the like occurs in that portion, deteriorating the image quality, or causing breakage, resulting in incomplete vacuum adhesion. Sufficient images can be obtained with a thickness in this range.

When a blower having a strong suction force is used, substantially the same flat surface effect can be obtained even when the squeezing means and the suction means are synchronized.

Finally, the photosensitive material mounting table is lowered to the lowermost position, the suction state of the photosensitive material is released by releasing the suction, and the leading end of the photosensitive material is fed to the holding roller 552 by a device (not shown).

The photosensitive material, the tip of which has reached the holding roller 552, is sent downward by the guides 561, 562, 563, 564, 565 and the switching chute 566 of the transport chute section 550 and the guide rollers 552, 553, 554, 555, 556. Guide rollers 556, 557, 558, 5 between guides 564, 565, 567, 568
It is transported by 59 and sent to the development processing section 600. When the internal latent image type direct positive photosensitive material is used, the exposure lamp 351 and the filter device 352 of the second exposure unit 350, the reflection plate 353, 354, and the exposure window 355 Box 356 provides fog exposure. Then, the photosensitive material passes through the bleach-fixing tank and the stabilizing tank, is dried while being slowly conveyed by the conveying rollers 681 and 682 through the drying section 680, and the photosensitive material after the development processing is collected at the right end of the apparatus.

The exposed photosensitive material starts to be transported through the transport chute 550, and the subsequent photosensitive material is moved to the photosensitive material mounting table 20.
The process of being conveyed to the upper side, measured and cut by the cutter unit 510, and then set in close contact is repeated as described above.

The photosensitive material requires the second exposure when using the internal latent image type direct positive photosensitive material, but does not require the second exposure when using the negative color photosensitive material and the solarization type direct positive photosensitive material, and is kept off. . When other photosensitive materials such as dye-bleached color photosensitive materials, color reversal, and diffusion transfer are used, exposure and development can be performed by a similar system by providing a processing bath suitable for each of them. .

Of course, for the exposure of the direct positive photosensitive material, the black plate is superimposed on each of the Y, M, and C originals, and B is used for the Y and black plates, and G is used for the M and black plates. , C plate and black plate are exposed three times in correspondence with the R filter. For exposure to a negative color photosensitive material, originals of Y plate, M plate and C plate are placed on the photosensitive material. Y alone
The plate is B, the M plate is G, the C plate is R, and the R filter is exposed three times, and the black plate is overlapped the fourth time, and the ND filter is supported, and if necessary, the color filter for color correction is supported. And expose.

Further, if necessary, in addition to the above-described respective color separation exposures, a basic color suitable for a printing ink may be obtained by further performing exposure using light equivalent to a different color separation.
Further, in order to previously blend light equivalent to different color separations, processing such as blending of BGR-colored light or exposure using a combination of filters may be performed. Similarly, in order to reproduce colors suitable for special inks other than the standard inks of Y, M, C, and BL, 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 decomposed netting film called a special color plate, or to combine another film with a decomposed netting film for a special color. It is necessary to perform close baking.

The exposed photosensitive material once enters the guide chute 565, reverses, and enters the developing device with the emulsion surface facing up. However, it is possible to enter the developing device as it is without entering the guide chute 565. However, when an internal latent image type direct positive photosensitive material is used as the photosensitive material, the second
The light source position for exposure must be located below the photosensitive material transport path, making maintenance and installation somewhat difficult, requiring an exposure window to be opened on the side of the developing tank, and difficult for cleaning liquid leaks. Is not so preferred.

There are high-sensitivity materials and non-high-sensitivity materials.
A plurality of light source lamps 302 of the polygonal cylinder 301 of 0 may be provided, and a large number of light sources may be turned on to enhance the exposure.

In addition, by using the treatment for lowering the scanning speed and the treatment for varying the opening and closing of the exposure window 310 together or independently, it is possible to perform high-quality exposure without deteriorating the reciprocity failure condition.

〔The invention's effect〕

As in the present invention, the photosensitive material and the film original are brought into close contact with a transparent cover sheet instead of a flat glass in order to perform close contact exposure while maintaining flatness, or the photosensitive material is set in an apparatus in a long roll state. Therefore, the device becomes compact. In addition, the photosensitive material is automatically measured and cut from a long roll into a photosensitive material of a predetermined length, and is placed at a predetermined position on a photosensitive material mounting table, so that it can be handled in a bright room and operability is improved. improves. Adhesion, positioning, and conversion of originals in multiple exposures of each separation net original film to the photosensitive material placed in this way can be performed quickly and reliably, and the adhesion effect by the suction means of the suction blower works smoothly. As a result, an image equivalent to a printed matter can be quickly formed on a color photosensitive material without damaging the original and the photosensitive material, and accurate original inspection can be performed.

[Brief description of the drawings]

FIG. 1 is a front view of a color proof creating apparatus equipped with the exposure apparatus of the present invention. FIG. 2 is a side view of one embodiment of the exposure apparatus of the color proof creating apparatus according to the present invention. FIG. 3 is a top view of the color proof creating apparatus shown in FIG. FIG. 4 is a side sectional view showing a positional relationship between a document table and a photosensitive material mounting table. 100: color proof creating apparatus main body 120: light shielding cover, 140: platen 141: upper surface, 142: lower surface 143: resist pin (pin bar) 200: photosensitive material mounting section, 201: photosensitive material Mounting table 201a top surface 201b abutting surface 201c airtight packing 204 suction channel groove 215 nozzle 240 light shielding member 242 light shielding belt 270 cover sheet device 275 … Transparent cover sheet 300… Exposure section, 276 squeeze roller 278… spring, 350… second exposure section 400… photosensitive material loading section 550… sensitive material transport chute section 600… development processing section 680 … Drying section

Claims (2)

(57) [Claims] 1. A light-shielding member for opening and closing an opening of a main body frame to make the main body light-shielding state, a photosensitive material loading section for loading a long roll of photosensitive material, and the light-shielding member being an opening of the main body frame. A photosensitive material mounting table disposed in the main body frame, wherein the photosensitive material is sent out from the photosensitive material loading section, and the photosensitive material having a predetermined length, which is measured and cut, is placed on the photosensitive material loading section; A light-shielding cover that can open and close the platen surface in a light room state and a light-shielded state, wherein when the light-shielding cover is closed and the light-shielding member opens the opening of the main body frame, the light-sensitive material mounting table is placed on the film original surface , The photosensitive material on the photosensitive material mounting table and the film original overlap, and a transparent cover sheet is placed on the film original, and the film original and the photographic photosensitive material are interposed through the transparent cover sheet. After air-adhesion, color proof making apparatus which is characterized in that the contact exposure from the transparent cover sheet side. 2. The transparent cover sheet has a thickness of 50 to 200 μm.
2. A color proof forming apparatus according to claim 1, wherein the color proof forming apparatus is a polyester film having a thickness of m.