JPH02275460A - Method and device for photosensitive material development processing - Google Patents

Abstract

PURPOSE:To prevent a photosensitive material from being stained by coating the surface of the photosensitive material with a specific amount of a developer, performing development, and washing the developer away by a water spray pipe. CONSTITUTION:A photosensitive material processor 10 is equipped with a development part 14 which develops a photosensitive lithographic printing plate (PS plate) 12 as the photosensitive material having images printed on both top and reverse surfaces by a printing device, a washing part 16 which washes the PS plate 12 after the development, and a finishing part 18 for coating the PS plate 12 with finisher liquid. Then the surface of the photosensitive material where the images are printed is coated with the specific amount of the developer and cleaning liquid which is supplied by a cleaning liquid supply means 73 is spouted out of the cleaning liquid spray pipe 67; and the developer on the surface of the photosensitive material is washed way and the cleaning liquid is squeezed by a squeeze roller 68. Consequently, no development refuse is stuck on the surface of the photosensitive material.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for developing a photosensitive material in which a predetermined amount of developer is applied to the surface of a photosensitive material on which an image has been printed.

[Prior Art] A photosensitive material (such as a photosensitive lithographic printing plate) on which an image has been printed is conveyed through a photosensitive material development processing apparatus, and a developer is supplied to the plate surface for development processing.

The above-mentioned development process includes a metering method in which a required amount of developer is applied to the plate surface of the photosensitive material for development. This metering type development process is equipped with a means for supplying a predetermined amount of developer, such as a wire bar, and the wire bar supplies a predetermined amount of developer to the surface of the photosensitive material being conveyed through the developing section. and developed.

The photosensitive material supplied with a predetermined amount of developer is inserted between a pair of squeeze rollers, and the developer attached to the surface is squeezed out.

[Problems to be Solved by the Invention] However, there is a problem in that development residue squeezed from the photosensitive material adheres to the surface of the pair of aperture rollers, and adheres to and stains the surface of the photosensitive material that is subsequently transported. This is because the metering method applies a predetermined amount of the developer to the surface of the photosensitive material, which is necessary for development, so the developer deteriorates to a high degree and becomes more viscous, making it more likely to adhere to the surface of the aperture roller pair.

The present invention has been made in consideration of the above facts, and an object of the present invention is to provide a method and apparatus for developing a photosensitive material in which the developer is removed from the photosensitive material using a water spray during development using a developer application method.

[Means and effects for solving the problem] The invention of claim (1) applies a predetermined amount of developer to the surface of a photosensitive material on which an image has been printed, and sprays the cleaning solution supplied by the cleaning solution supply means. It is characterized in that it is discharged through a pipe to wash off the developing solution on the surface of the photosensitive material, and the cleaning solution is squeezed out with a squeezing roller.

Therefore, according to the invention of claim (1), after a predetermined amount of developer is applied to the surface of the photosensitive material on which the image has been printed, water is discharged onto the printing plate using a spray pipe, and the water adheres to the surface of the photosensitive material. Any developing residue left behind is washed away. On this occasion,
Since the developer scum is washed away in front of the squeezing roller, it is possible to prevent the developer scum from adhering to the squeezing roller pair.

As a result, development residues do not adhere to the surface of the aperture roller pair, and therefore development residues do not adhere to the surface of the photosensitive material.

The invention according to claim (2) includes: a developer applying means for applying a predetermined amount of developer to the surface of the photosensitive material on which an image has been printed; and a squeezing roller disposed on the downstream side of the developer applying means. The present invention is characterized in that it includes a cleaning liquid spray pipe disposed between the developer applying means and the squeezing roller to wash away the developer from the surface of the photosensitive material coated with a predetermined amount of the developer.

Therefore, according to the invention of claim (2), the photosensitive material coated with a predetermined amount of developer by the developer application means is coated with developer scum and excess developer that adhere to the surface due to water discharged from the spray pipe. is washed away. The developer residue and excess developer that adhere to the surface of the photosensitive material in front of the aperture roller are washed away by the rinsing water from the spray pipe, and the developer residue does not adhere to the aperture roller, thereby preventing it from adhering to the surface of the photosensitive material. .

Embodiment 1 First Embodiment FIG. 1 shows an embodiment of a photosensitive material development processing apparatus 10 according to the present invention.

The photosensitive material processing apparatus 10 includes a developing section 14 for developing a photosensitive lithographic printing plate (hereinafter referred to as rpS plate) 12, which is a photosensitive material with images printed on both upper and lower surfaces thereof, by a printing device (not shown); It is provided with a water washing section 16 for washing the subsequent PS plate 12 with water, and a finishing section for applying a finishing liquid to the PS plate 12. These developing section 14, water washing section 16, and finishing section 18 are provided in this order, and the PS plate I with images printed on both the upper and lower surfaces.
2 is transported in a substantially horizontal direction and processed.

As shown in FIG. 1, a pair of conveying rollers 20 is arranged on the side where the PS plate 12 is inserted into the developing section 14. The transport roller pair 20 is rotated by a driving means (not shown), the PS plate 12 is inserted into the transport roller pair 20, and the developing section 14 is rotated.
send it off to The developing section 14 is equipped with a drain tank 22 . The drain tank 22 is open at the top and has a substantially inverted mountain shape with the center portion of the bottom protruding downward, and the developer is stored at the bottom.

A fountain wire par 24 is disposed above the drain tank 22 and below the transport path on the insertion side of the PS plate 12, and is supported by a pair of side plates (not shown).

As shown in FIG. 2, this fountain wireper 24 includes a developer storage tank 28 in which a developer is stored, and a developer located above the developer storage tank 28 and stored in the developer storage tank 28. It is formed by a wire parser 30 that applies the liquid to the lower surface side of the PS plate 12 and a recovery tank 29 that collects the excess liquid from coating and returns it to the developer tank 44.

As shown in FIG.
The opening 2 has a box shape that is long along the width direction of 2, has a chevron-shaped upper part, and opens upward along the longitudinal direction.
6 is formed. Half to three quarters of the outer circumference of the wire par 30 is inserted into the opening 26.

The wire par 30 is formed by winding a wire 34 spirally around the outer periphery of a shaft 32.

This wire parr 30 is rotated clockwise in FIG. 1 by the driving force of a driving means (not shown), and the developer in the developer storage tank 28 is applied between the windings of the wire 34 and applied to the lower surface of the 28 plate 12. The amount of application is determined by the diameter of the wire 34, and the larger the diameter of the wire 34, the larger the amount of developer that adheres between the wires 34, and therefore the larger the amount of application. Moreover, if the diameter of the wire 34 is small, the amount of coating is small. Further, the coating amount can also be set by the rotation direction and/or rotation speed of the wire par.

Above the fountain wire par 24, the wire par 3
0 is placed. This wire par 30 is 28 version 12
It is disposed above the conveyance path, and is positioned so as to be in contact with the upper surface of the 28 plate 12 sent out from the conveyance roller pair 20.

A developer guide plate 36 having a figure 12 cross section is disposed diagonally above the wire par 30 between the upper roller of the transport roller pair 20 and the wire par 30. The developer guide plate 36 is disposed parallel to the wire par 30 such that one lower end edge of the L-shape is close to the outer periphery of the wire par 30. This developer guide plate 36 is formed long along the width direction of the PS plate 2, and the spray pipe 38 faces it.

The spray pipe 38 has a plurality of discharge ports opening toward a part of the corner of the developer guide plate 36 at equal intervals along the axial direction. A conduit 40 is connected to the spray pipe 38 . This conduit 40 is branched from a conduit 42.

The pipe line 42 communicates with the bottom of the developer tank 44,
A developer supply pump 46 is disposed in the middle. By the operation of this developer supply pump 46, the spray pipe 38
Developing solution is supplied to.

Further, a pipe line 48 branched from the pipe line 42 is connected to the developer storage tank 2.
8, and the developer is supplied from the developer tank 44 by the operation of the developer supply pump 46. The developer recovery tank 29 is connected to a pipe line 41 . This conduit 41
is communicated with the upper part of the developer tank 44.

The developer supplied to the spray pipe 38 is guided by the developer guide plate 36 and supplied to the wire parser 30, which sets a predetermined amount and applies it onto the PS plate 12.

Further, one end of a pipe line 52 is communicated with the bottom of the developer tank 44 . In the middle of this pipe line 52, a circulation pump 54,
A heat exchanger 56 is arranged.

The other end is again communicated with the developer tank 44.

By the operation of the circulation pump 54, the developer in the developer tank 44 is circulated and heated to a predetermined temperature.

Further, one end of a pipe line 58 is communicated with the bottom of the drain tank 22 . A valve 60 is disposed in the middle of this conduit 58. By opening this valve 60, the developer in the drain tank 22 is discharged to the waste tank 62.

Furthermore, skewer-shaped rollers 64 and 66 are arranged above the waste liquid tank 22. These skewer-shaped rollers 64.66 are 28 plate 1
It is disposed below the conveyance path of No. 2, and supports the lower surface of the 28 plate 12 that is sent out from the conveyance roller pair 20 and conveyed.

A squeeze roller pair 68 is arranged between the developing section 14 and the washing section 16.

A spray pipe 67 is arranged on the upstream side of the squeeze roller pair 68 in the conveying direction of the 28 plate 12.

The spray pipes 67 are arranged along the width of the 28 plate 12, and a plurality of spray pipes are provided at appropriate intervals along the axial direction with washing water discharge ports opening diagonally toward the 28 plate 12 to which it is conveyed. ing. Washing water is supplied to these spray pipes 67 and sent out from the conveyor roller pair 20.
A predetermined amount of developer is discharged toward the 28 plate 12 coated on both the upper and lower surfaces, and the surface of the 28 plate 12 is cleaned to remove developer residue and excess developer. Further, water is squeezed out by a pair of squeeze rollers 68 and the PS plate is conveyed to the water washing section 16.

The spray pipe 67 is communicated with one end of the conduit 69. The other end of the pipe 69 is in communication with a water tank 71, and a washing water supply pump 73 is disposed in the middle. The spray pipe 67 is supplied with the washing water in the water tank 71 by the operation of the washing water supply pump 73 .

The washing section 16 is equipped with a washing tank 70, and the washing section 1
A pair of conveying rollers 72 is disposed on the downstream side of the 6/23 plate 12. The transport roller pair 72 is rotated by the driving force of a drive means (not shown), and the 23rd plate 12 sent out from the squeeze roller pair 68 is inserted and sent to the finishing section 18 .

Spray pipes 74 and 76 are arranged between the squeeze roller pair 68 and the transport roller pair 72. The spray pipe 74 is arranged above the conveyance path of the 23rd plate 12, and the spray pipe 76 is arranged below the conveyance path.

These spray pipes 74 and 76 are provided with discharge ports at regular intervals along the axial direction, and discharge the supplied washing water to the squeeze roller pair 68 and the brush roller 72.

The spray pipes 74 , 76 communicate at one end with a conduit 78 that communicates with the bottom of the washing tank 70 .

A flush water supply pump 80 is disposed in the middle of this pipe line 78, and by the operation of this flush water supply pump 80,
Rinsing water 82 contained in the bottom of the rinsing tank 70 is supplied to the spray pipes 74,76.

Further, one end of a pipe line 84 is connected to the bottom of the washing tank 70 . A valve 86 is disposed in the middle of this pipe 84, and when the valve 86 is opened, the flush water 82 in the flush tank 70 is discharged to the waste liquid tank 88.

The finishing section 18 is equipped with a finishing tank 92. A finishing liquid 94 is stored at the bottom of the finishing tank 92 .

Above the finishing tank 92, two pairs of conveying rollers 96 and 98 are arranged along the conveying direction of the 23rd printing plate 12. These conveyance roller pairs 96 and 98 are pivotally supported by a pair of side plates (not shown), and are rotated by the driving force of a driving means (not shown). The 23rd printing plate 12 sent out from the conveying roller pair 72 is inserted into the conveying roller pair 96 .
Sent to 8th.

A spray pipe 100, 102 is arranged between the transport roller pair 96 and the transport roller pair 98. The spray pipe 100 is located above the conveyance path for the 23rd plate 12, and the spray pipe 102 is located below the conveyance path. The spray pipes 100 and 102 have a plurality of discharge ports that open toward the conveyance rollers 96 and 98 and are provided at regular intervals along the axial direction. One end of the spray pipes 100 and 102 communicates with the bottom of the finishing tank 92. pipe line 10
It is connected to 4. A supply pump 106 is disposed in the middle of this conduit 104, and the operation of this supply pump 106 supplies the finishing liquid 94 in the finishing tank 92 to the spray pipes 100, 102.

Further, one end of a conduit 110 is communicated with the bottom of the finishing tank 92. A valve 1 is located in the middle of this pipe line 110.
When the valve 112 is opened, the finishing liquid 94 in the finishing tank 92 is discharged to the waste liquid tank 114.

Next, the operation of this embodiment will be explained.

The 23rd plate 12, on which images have been printed on both upper and lower surfaces by a printing device (not shown), is inserted into a pair of conveying rollers 20 and then into a developing section 14. The 23rd plate 12 inserted into the developing section 14 is conveyed substantially horizontally and sent onto the fountain wire par 24.

A predetermined amount of developer 24 is applied to the lower surface side of the 23rd printing plate 12 by the wire parr 30 of the fountain wire parr 24 .

When further conveyed, a predetermined amount of developer is applied to the upper surface side by the upper wire parr 30. In this case, the developer discharged from the spray pipe 38 is directed to the L-shaped developer guide plate 36.
The wire par 3 is guided from the lower end edge of the L shape.
Dropped to 0.

The 23rd plate 12, whose upper surface has been coated with a predetermined amount of developer 24 by the wire parr 30, is guided by skewer rollers 64 and 66 and further conveyed, and during this conveyance, the upper and lower surfaces of the 23rd plate 12 are coated with a predetermined amount of developer. The photosensitive layer swells or dissolves.

In this state, it is conveyed to a water spray 67, where so-called development scum and excess developer, in which the photosensitive layer is swollen or dissolved, are washed away. 23rd edition 1 passed between squeeze roller vs. 68
2 is sent above the washing tank and inserted between the pair of transport rollers 72.

Washing water is discharged from the spray pipe 67 in front of the squeeze roller pair 68, and developer residue and excess developer attached to the surface of the PS plate 120 are washed away and removed. This prevents developer residue and excess developer from adhering to the surface of the squeeze roller pair 68, so that the surface of the 23rd plate 12 is not contaminated.

The spray pipe 7 is sent out from between the squeeze roller pair 68 and sprayed onto both upper and lower surfaces while being conveyed between the conveyor roller pair 72.
Washing water is supplied by step 4.76, and developer residue remaining on the plate surface and excess developer are washed away.

The 23rd plate 12, whose upper and lower surfaces have been washed with water, is sent out from between the pair of conveying rollers 72 and sent out above the finishing section 18.

The conveyor roller pair 72 sends out the water from the water washing section 16.
The third version 12 is inserted between the pair of transport rollers 96. The 23rd printing plate 12 inserted into the pair of conveying rollers 96 is conveyed in a substantially horizontal direction and inserted between the pair of conveying rollers 98 . During this conveyance, the finishing liquid 94 is supplied to both upper and lower surfaces of the 23rd plate 12 by spray pipes 100 and 102. Finishing fluid 94 by spray pipe 100.102
The 23rd plate 12 coated with is sent out of the photosensitive material development processing apparatus 10 by a pair of transport rollers 98 and is transported to a drying apparatus (not shown).

[Effects of the Invention] As explained above, according to the inventions of claims (1) and (2), a predetermined amount of developer is applied to the surface of the photosensitive material on which the image is printed, and development is performed using a water spray pipe. Since the developer is washed away, development scum and excess developer do not adhere to the surface of the aperture roller, and the excellent effects of not staining or damaging the photosensitive material can be obtained.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a photosensitive material processing apparatus to which the present invention is applied, and FIG. 2 is a perspective view showing a fountain wire bar. DESCRIPTION OF SYMBOLS 10... Photosensitive material development processing device, 12... PS plate, 14... Developing section, 67... Spray pipe, 68... Squeeze roller pair, 69... Pipe line, 71... Water tank, 73...Washing water supply pump. Figure 2

Claims (2)

[Claims] (1) A predetermined amount of developer is applied to the surface of the photosensitive material on which the image has been printed by the developer application means, and the cleaning solution supplied by the cleaning solution supplying means is discharged from the cleaning solution spray pipe to remove the developer on the surface of the photosensitive material. A photosensitive material development processing method characterized by washing and squeezing out the cleaning solution with a squeezing roller. (2) a developer application means for applying a predetermined amount of developer onto the surface of the photosensitive material on which an image has been printed; a squeeze roller disposed on the downstream side of the developer application means; and a developer application means. A photosensitive material development processing apparatus comprising: a cleaning liquid spray pipe disposed between the squeezing rollers and for washing away the developer from the surface of the photosensitive material coated with a predetermined amount of the developer.