JPH01196062A - Developing device - Google Patents

Abstract

PURPOSE:To prevent finish color reproduction from deteriorating by supplying supplementary liquid to the 1st tank of a development tank and supplying only a developer which overflows the 1st tank to a 2nd tank. CONSTITUTION:A partition wall 601A is provided on the intermediate part of the development tank 601, which is partitioned into the 1st tank 601B which contains a 2nd exposure part and the 2nd tank 601C which contains no exposure part. Then the developer (CD) in the 1st tank supplied with fresh liquid from a fresh liquid supply pipe 602 overflows its weir to flow in the 2nd tank 2, but the liquid level in the 2nd tank is held a little bit lower than the liqiud level in the 1st tank and waste liquid which is nearly as much as the fresh liquid flows out of an outlet 603. Thus, the developer (CD) in the 1st tank is replaced with the fresh supplementary liquid early before the degree of discoloration progresses, the 1st tank serves for dip exposure rather than coloring development, and the 2nd tank serves as a dedicated tank for coloring development (CD). Consequently, color development of high quality is carried out without spoiling color reproduction on a photosensitive material.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a developing device for achieving high quality development finishing of an internal latent image type direct positive color photosensitive material.

[Conventional technology]

Fields that have traditionally used positive coated silver halide color photosensitive materials include color copying machines in the office equipment field, and color proofing devices for proofreading halftone original film required for various plate-making processes in the printing plate-making field. there were. In both cases, the image of the original image is exposed onto the photosensitive material in a projected or close-contact state, and the image is finished by a developing device. In the case of very strict color reproduction and gradation reproduction and halftone images, maintenance of halftone precision has been required.

In particular, regarding color reproduction, B, G, R or C, M, Y filters and N
In combination with a D filter, the color components of the exposure light are precisely determined and image exposure is performed to form a faithful color image.

However, faithful color reproduction cannot be achieved only by exposure control in image exposure as described above. A steady state is always maintained by controlling the circulation temperature of each processing solution in the developing device and replenishing new solution to prevent processing performance fatigue.

[Problem that the invention seeks to solve]

Developer fatigue progresses as oxidation progresses, and new solution is replenished so as not to affect development performance.
The developing solution changes color during the progress of oxidation. Even if there is discoloration, if the progress of oxidation is within an allowable range, development itself is performed normally. On the other hand, when developing a photosensitive material using an internal latent image type direct positive, the photosensitive material in the developer tank is uniformly exposed to light as a second exposure while immersed in a developer, and then color development is performed. At this time, the color balance of the exposure light source greatly affects the finished color reproduction. Therefore, if a uniform exposure is applied through a colored developing solution, the developed finish will be out of color balance.

In particular, in systems in which anti-irradiation dyes are added to photosensitive materials for the purpose of improving gradation reproducibility, expanding exposure latitude, etc., depending on the decolorization properties of the added dyes in the developer, the secondary During exposure, color clouding occurs in the developing solution, which acts as a color filter and causes a deterioration in color reproduction in the finished product.

The present invention aims to solve these problems.

[Means for solving problems]

The purpose of this is to create a space between the first developing bath for immersion exposure and the second developing bath for development processing in a developing processing apparatus for silver salt color photosensitive materials that require second exposure in a color developing solution. A partition wall is provided to divide the developing tank into a first tank and a second tank.
A developing device characterized in that the liquid in the second tank is prevented from flowing into the tank, the replenisher is supplied to the first tank, and only the developer overflowing from the first tank is supplied to the second tank. achieved by

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS A color proof production apparatus equipped with a developing device according to an embodiment of the present invention will be described with reference to a front view in FIG. 1, a side view in FIG. 2, and a top view in FIG. 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 color-separated into 0, M, Y, and black versions, the color proofing device checks to make sure there are no mistakes in the layout of the original film and that the colors are different. This is a device for inspecting whether there are any errors or errors in characters, etc., and obtaining a proof to confirm the finish of printed matter in advance.The device positions the above-mentioned decomposition film one or several at a time and exposes it to color. By creating a proof using color photosensitive material by superimposing multiple contact exposures on the material, it is possible to discover errors in the separation screen original, check the print finish in advance, and take action to correct the separation screen original. This is what I did.

The main body 100 includes a document table 140 having an upper surface 141 and a lower surface 142 on which a document positioning pinper 143 is installed above the main body frame 101 supported by legs 102.
A light-shielding cover 120 is provided above the light-shielding cover 120, which can be freely opened and closed to form a dark room as a first room.

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, on the outside thereof, there is a shielding plate 308, a solenoid 312 for operating it, a return spring 314, and an exposure window 31.
A housing 316 is provided having a value of 0. The exposure section 300 can run on the rails 317A and 317B for scanning.

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
It is driven by a motor 214 and can be moved up and down.

On the other hand, an endless light-shielding belt 242 as a light-shielding member is wrapped around the rollers 241, 242A, 243, 244, and an exposure window having a size at least larger than the cross section of the moving area of the photosensitive material mounting table is opened approximately in the middle of the length. It is being In such a light-shielding member 240, the light-shielding belt runs on a surface slightly lower than the lower surface 142 of the document table, that is, the boundary area between the first chamber and the second chamber, so that the second light-shielding member 240, in which the photosensitive material holding table 201 is housed, is moved. 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 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 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 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 penetrate through a guide hole drilled in the head and frame, and is fixed to the frame in the thrust direction, and the head is slidable along the hole. It floats above the exposure table surface via a helical spring 532 that is installed between the traveling head 522 and the 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 201 in this manner, suction pressure is applied to the suction hole formed on the photosensitive material placing table by driving the blower 204A via the flexible hose 205. The photosensitive material is closely fixed on 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 242 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.

Here, the upper light-shielding cover 120 is peeled off, the first chamber is brightened with external light, and a resist pin (pin bar) 143 set on the upper surface part 141 is attached to the separated mesh original (black version, Y, M).

For example, one of C, for example, Y plate, or one of Y, M, C, black plate, or several or all of these), and the majority of the manuscript is Place it on a blackout curtain.

In this state, the light-shielding cover 120 is closed to make the first room a dark room and light-tight, and the light-sensitive material mounting table is raised slightly below the surface of the light-shielding curtain belt, and then the light-shielding curtain belt 242 is moved to open it. Then, in a state where both the first room with the upper surface of the document table and the second room with the photosensitive material placement table become a common dark room, the photosensitive material placement table 201 is raised to match the exposure surface, that is, the separation screen original reference surface. At this time, the airtight gasket 201c provided on the abutment surface around the photosensitive material mounting table in the second chamber is attached to the document table 1 in the first chamber.
The gap formed by the insertion surface of the photosensitive material mounting table into the opening forms a suction flow path groove 204, and the transparent cover sheet is in close contact with the lower surface 142 of the document table and the photosensitive material mounting table. Airtightness between the sandwiched original and the photosensitive material is maintained.

That is, a transparent cover sheet roll 274 is wound around a shaft 273, and its tip passes through a squeeze roller 276 and is stopped by a stopper 272.
71 is guided by the rails 281A and 281B to the second
Cover sheet roll 27 by moving to the right in the figure.
The cover sheet 275 unwound from the cover sheet 275 is pressed by a spring 278 and squeezed by a squeeze roller 276 which is rotatably fixed by a shaft 277, and the document and photosensitive material are covered with the cover sheet until the right end is reached by the head. At this point, the blower 206 as a pressure reducing device operates and the photosensitive material mounting table 20
Through the suction hose 207 connected to the suction hole 201f drilled in 1, air is sucked through the flow path groove 204, and the air interposed between the exposure table, the upper surface, and the cover sheet is sucked, and the photosensitive material and each original are sucked out. The cover sheet and the cover sheet are overlapped and held in close contact with each other in a planar shape. However, the suction hole 2
01f 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 smoothly flow between the transparent cover sheet, the document table and the photosensitive material mounting table through the flow grooves, and the cover sheet, the document and the photosensitive material can be placed in the correct flat shape. Close contact is achieved. 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 to the guide rail 317.
A and 317B, scanning exposure is performed, and the first color exposure using the filter is completed.

Next, in order to perform a second image exposure using a filter of a different color, the cover sheet is returned to its original position and 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 215. By switching to the blowing side of the blower 206 to blow 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 blowing by the blower and the lowering of the photosensitive material mounting table may be performed in the opposite order or at the same time. and light shielding cover 120
If you open the 1st room, the 1st room will be in the bright state, but the 2nd room will be in the state of the 1st room.
This means that a dark room is formed that is light-dense compared to the room.

In this state, the second manuscript (black version and one of Y, M, C, e.g. M version, or any one of Y, M, C, black version, or several or all of these) After setting it on the registration pin and covering it with a light-shielding cover, open the light-shielding curtain and raise the photosensitive material mounting table to the document table surface, cover the cover sheet again, apply suction, make each sheet stick together, and turn the polygonal tube 301. Then, the cylindrical surfaces provided on another filter are made to face each other, and scanning contact exposure is performed using the second color filter, and the second exposure is completed.

Similarly, the third manuscript (black version and one of Y, M, C, e.g. 0 version, or any one of Y, M, C, black version, or several or all of these) and Exposure using the corresponding 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.

Furthermore, when using a blower with a 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 tip of the photosensitive material is fed to the nipping roller 552 by a device not shown.

The photosensitive material whose tip has reached the nipping roller 552 is guided by the guides 561, 562, 563, 56 of the conveyance chute section 550.
4.565 and switching chute 566 and guide roller 5
52,553° 554.555.556, and then the swinging shaft 5 of the switching chute 566
By switching around 68, the sheet is conveyed by guide rollers 556, 557, 558, and 559 between guides 564, 565°, 567, and 568, with the rear end at the beginning, and sent to the developing device 600. When using an internal latent image type direct positive photosensitive material, in the color developing tank 6,
While transporting, the exposure lamp 351 and filter device 352 of the second exposure section 350, the reflection plates 353, 354, and the exposure window 35
Fog exposure is performed by an exposure box 356 consisting of 5 parts.

A partition wall 601A is provided in the middle of the developing tank 601, dividing the developing tank 601 into a first tank 601B that accommodates the second exposure section and a second tank 601C that does not. First tank 6
A new liquid supply vibro 02 is provided at the bottom of 01B, and a waste liquid outlet 603 from the nuclide is provided in the second tank. Moreover, an over 70-weir 60 is provided on the upper part of the partition wall 601A.
4 is formed, and the liquid level of the first tank 601B is maintained at the height of this weir. When the new solution is replenished by the new solution supply Vibro 02, the developing solution (CD) in the first tank flows out over the weir into the second tank, but the liquid level in the second tank is lower than that of the first tank. It is controlled so that approximately the same amount of waste liquid flows out from the outlet 603 as the new liquid is replenished.

In this way, the developer (CD) in the first tank can be replaced with new replenisher as soon as possible before the degree of discoloration progresses.
It was decided that the first tank would mainly serve the role of immersion exposure in the developer rather than the role of color development, and the second tank would be used exclusively for color development (CD). The photosensitive material then passes through a bleach-fixing tank of BF, a stabilizing tank of SR1 and SR1, is dried while being slowly transported through a drying section 680 by transport rollers 681 and 682, and the developed photosensitive material is collected at the right end of the apparatus.

It should be noted that as the exposed photosensitive material begins to be conveyed through the conveyance chute section 550, the subsequent photosensitive material is transferred to the photosensitive material mounting table 2.
The process of being conveyed onto the old surface, measured, cut by the cutter section 510, and set in close contact is repeated as described above.

When using an internal latent image type direct positive, the photosensitive material is the second
Although exposure is necessary, when using a negative color photosensitive material or a solarization type direct positive photosensitive material, the second exposure is not necessary and the light remains 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, regarding exposure to direct positive light-sensitive materials, each Y, M, and C version of the original is overlaid with a black version, and B is used for the Y version and the black version, and G is used for the M version and the black version. , the C plate and the black plate are exposed to light three times using corresponding R filters, but when exposing a negative color photosensitive material, each Y plate, M plate, and C plate original is placed on the photosensitive material. Layer it alone, layer G on the Y version for the 81M version, layer R on the C version, and use 3.
Exposure is performed twice, and a fourth time, a black plate is overlaid and exposed using an ND filter and, if necessary, a color filter for color correction.

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. Furthermore, in order to blend light equivalent to different color separations in advance, processing such as blending BGR 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 BL, which are generally referred to as spot colors, repeated exposure, blending of colored light, or combination of filters may be performed. In this case, depending on the case, it may be necessary to use a separation mesh film called a special color film, or to combine the separation mesh film for special colors with other films, and in some cases, it may be necessary to stack several layers of other separation mesh films. It is necessary to perform contact baking.

Note that the photosensitive material that has been exposed once enters the guide chute 565, is turned over, and enters the developing device with the emulsion side facing up; however, it can also be placed in the developing device by knee-turning without entering the guide chute 565. . However, when using an internal latent image type direct positive photosensitive material, the light source position for the second exposure must be located below the photosensitive material transport path, making maintenance and installation somewhat difficult, and the side of the developer tank. This is not very preferable because the exposure window must be opened at the same time, making it difficult to clean up leaks.

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 second exposure in a developing device incorporated in a color proof production device or a color copying device using an internal latent image type direct positive color photosensitive material can be performed without impairing color reproduction on the photosensitive material. This has made it possible to achieve high-quality color development.

[Brief explanation of the drawing]

FIG. 1 is a front view of a color proof production device equipped with a developing device according to an embodiment of the present invention. FIG. 2 is a side view of one embodiment of the exposure device of the color proof production device. FIG. 3 is a top view of the color proof production apparatus shown in FIG. 1. FIG. 4 is a side sectional view showing the positional relationship between the document table and the photosensitive material mounting table. 100...Color proof creation device main body 120...
Light-shielding cover 140... Original table 300... Exposure section 350... Second exposure section 600...
Developing device! 601A...Partition wall 601B...
・First tank 601C...Second tank 602...
New liquid supply pipe 603... Waste liquid outlet 604...
・Overflow weir

Claims (1)

[Claims] In a development processing apparatus for a silver salt color photosensitive material that requires a second exposure using a color developer, a partition is provided between a first developer bath for immersion exposure and a second developer bath for color development. The tank is divided into a first tank and a second tank to prevent the liquid from the second tank from flowing into the first tank, and the replenisher is supplied to the first tank.
A developing device characterized in that only the developer overflowing from the first tank is supplied to the second tank.