JPH049946A - Processing device for photographic sensitive material - Google Patents

Abstract

PURPOSE:To rapidly set the temp. and humidity of a drying section to desired conditions and to substantially prevent the generation of color slurring, etc,. by the dimensional change of a photosensitive material for plate making by providing an openable/closable shutter in a discharge duct for discharging the air of the drying section. CONSTITUTION:The shutter 461 is opened and closed by a solenoid 462 and a ventilation fan 455 formed at the terminal of the discharge duct are provided in the discharge duct for discharging the air of the drying section 400 of this device. Sensors 182, 183 detect the temp. and humidity in a hot wind duct when the photosensitive material is transported to an insertion part 100. A control section 490 closes the shutter 461 according t the detection signal thereof and calculates the operation timing in an ultrasonic humidifier 470. The inside of the drying section 400 is set at the desired temp. and humidity before the photosensitive material arrives from a crossover section 405 at the drying section 400.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a method for increasing the rate of increase in humidity and temperature at the start-up of a drying section of a photosensitive material processing apparatus equipped with a function of controlling the dimensions of silver salt photosensitive materials. Regarding improvements.

[Conventional technology]

In photosensitive materials for printing used in plate making for color printing, the dimensions of the developed finished state must be controlled so that color shift does not occur even when three to four films of each separated color are superimposed. Therefore, when exposing each photosensitive material separately into each color, the environmental conditions of the image exposure device and its vicinity should be the same, and when developing and finishing each photosensitive material,
It is necessary to set the temperature and humidity conditions and processing speed of the processing apparatus to predetermined values so that each photosensitive material can be finished to the same size. Furthermore, it is more preferable that the dimensional magnification during exposure and after development is almost the same. In particular, it is important to ensure that there is no dimensional deviation between the photosensitive materials exposed and developed using the respective separated colors. In this way, it would be ideal to strictly control the temperature and humidity conditions of the exposure device and its surroundings during image exposure, as well as the development processing conditions, and to perform plate-making work using photosensitive materials that are less prone to color shifts due to dimensional changes. be.

However, the actual working environment conditions are temperature lO throughout the year.
Since the temperature fluctuates within a range of ~30°C1 humidity IO ~90%, a normal air conditioner may not be able to control the temperature and humidity to an appropriate level.

In the past, photosensitive materials shrink in low humidity and expand in high humidity, causing their dimensions to change.In addition, the dimensions of the sensitive material also change before and after processing, causing problems such as color shift.

[Invention or problem to be solved]

For this reason, the environmental temperature and humidity conditions at the time of imagewise exposure of each photosensitive material are detected and memorized or recorded in some way, and the optimal temperature and humidity conditions for development are determined. It is desirable to develop and finish.

However, even if the temperature and humidity conditions during development processing are set for the photosensitive material under each exposure condition, it takes time to reach the set values depending on the environmental conditions, resulting in poor processing efficiency. It is an object of the present invention to provide a photosensitive material processing apparatus which eliminates such problems and allows development processing to be completed to an optimum size and to be carried out quickly.

[Means to solve the problem]

The purpose of this is to provide a photosensitive material processing apparatus in which a humidifying means is provided in the drying section, which is equipped with an exhaust tact and an exhaust fan for exhausting air from the drying section, and in the middle of the exhaust tact, an opening/closable /-cutter is provided. This is achieved by a photosensitive material processing apparatus characterized in that the exhaust fan is turned on and off instead of opening and closing the filter.

〔Example〕

One embodiment of the present invention is shown in the cross-sectional view in Figure 1(a) and in Figure 1(a).
This will be explained using FIGS. 1(b), 1(c), and 1(d), which are sectional views taken along lines AA, BB, and CC in a). However, the present invention is not limited thereto.

The photosensitive material processing apparatus 1 includes a photosensitive material insertion section 100 and a developing device 1.
'! ! 211, a liquid immersion processing section 200 consisting of a fixing tank 221, a washing tank 231, and an upper lid 201, a transition section 405 to a drying section 400, a drying section 400 and an overall top plate 202, Room 401, hot air duct 403, and hot air nostle room 411.412.421.42
2.43], 432, heater 404, drying section upper rack cover 441, drying fan 452, and warm air circulation tact 4
51, an exhaust tact 453 branched from the warm air duct 403 housing the circulation tact and heater, a shutter 461 opened and closed by a solenoid 462 provided in the middle of the duct, and a shutter 461 provided at the end of the exhaust tact 453. It consists of an exhaust 7-amp 455.

The ultrasonic humidifier 470 includes a water tank 471 and a circulation 7.
Ann 453 is also provided. Water vapor is then contained in the hot air due to the action of the generated ultrasonic waves. Furthermore, the humidity and temperature inside the hot air duct, which vary accordingly, are measured by internal humidity sensors 472 and 472, respectively. As detected by internal temperature sensor 473.

Here, the operation of the photosensitive material processing apparatus 1 will be explained. This is an example where the environmental conditions are a temperature of 23° C. and a humidity of 20 to 30%.

In the apparatus 1, when no photosensitive material enters the insertion slot, the temperature of the drying section is maintained at a temperature several times lower than the temperature of the drying section during processing, and the heater 404 and drying section 452 are turned on. Waiting at 0FFL.

In addition, the ultrasonic humidifier 470 is also stopped, and the drying section 40
The humidity within 0 is maintained at about 10%.

When the photosensitive material enters the insertion slot 100, the temperature and humidity are read by sensors 182 and 183 set around the exposure device and sent to the control unit 490, and the data is sent to the control unit 490.
Calculate the timing to close the filter 461 and operate the ultrasonic humidifier 470, and wait until the photosensitive material passes through the insertion section 100, passes through the immersion processing section, and enters the drying section 400 from the transition section 405 until the tip enters the drying section 400. It takes 30 seconds to 70 seconds to obtain the temperature and humidity conditions of the drying section 400 that are stable with the above-mentioned dimensions when the tip is about to enter the drying section 400. And the humidity was around 10%, for example.
The optimum humidity for the photosensitive material is increased to 30%, and the temperature is increased to 40%.
For example, the optimum temperature for the photosensitive material is increased from about 45°C to 45°C. After the photosensitive material enters the insertion slot 100, the optimal temperature and humidity conditions are adjusted in the drying section when it reaches the drying section 400 in a normal period of time, for example, 30 to 70 seconds. This is so that it can be completed.

To explain this in Figure 2, the humidity reaches the conventional setting [2].
The time taken by the present invention is 12-1 seconds.

It becomes possible to reach within seconds, and the operating time of the humidifier is t1.
The amount of water used can also be reduced.

In this embodiment, the temperature and humidity were controlled by opening and closing the luster 461 with the thread/light 462, or the /young 461 was not provided, and the temperature and humidity were controlled.
Of course, it is also possible to control by turning on and off the exhaust fan 455, which falls within the scope of the present invention.

〔Effect of the invention〕

According to the present invention, the humidity rises quickly and the time required to operate the humidifier is shortened, so power consumption and the amount of water used are reduced, and the optimum humidity state can be reached instantaneously. Problems such as color shift due to dimensional instability of the material are resolved, high-quality plate making is possible, and processing with good dimensional stability can be performed without losing speed regardless of the conditions of the mound. is effective

[Brief explanation of drawings]

FIG. 1(a) is a sectional view of a photosensitive material processing apparatus according to one embodiment of the present invention. FIG. 1(b) is a sectional view taken along the line AA in FIG. 1(a). FIG. 1(c) is a sectional view taken along line BB in FIG. 1(a). FIG. 1(d) is a sectional view taken along line cc in FIG. 1(a). Figure 2 is a graph comparing the time it takes for the drying section to reach the set humidity. ■...Photosensitive material processing apparatus 100...Insertion section 200...Liquid immersion processing section 4
00... Drying section 403... Warm air duct 40
4... Heater 451... Circulation duct 45
2...Drying fan 453...Circulation fan 45
3...Exhaust duct 455...Exhaust fan 46
1... Shiny 462... Solenoid 47
0...Ultrasonic humidifier 471...Water tank 472...Internal humidity sensor 473...Internal temperature sensor rate has been successfully achieved.

Claims (2)

[Claims] (1) A photosensitive material processing apparatus in which a humidifying means is provided in a drying section, which is equipped with an exhaust duct and an exhaust fan for exhausting air from the drying section, and a shutter that can be opened and closed is provided in the middle of the exhaust duct. Photosensitive material processing equipment. (2) A photosensitive material processing apparatus according to claim 1, characterized in that the exhaust fan is turned on and off instead of opening and closing the shutter.