JPH01225952A - Liquid removing method for automatic developing device - Google Patents

Abstract

PURPOSE:To prevent the occurrence of damages and uneven processing on the surface of a photosensitive material by overflowing liquid to the surface of photographing material carrying members from its inside and removing processing liquid stuck to the surface of a photographing material by pressing the surface of the material by using the surfaces of the photographing material carrying members. CONSTITUTION:By overflowing liquid to the surface of photographing material carrying members A and B from the inside and pressing the surface of a photographing material 10 by using the surfaces of the members A and B, the processing liquid stuck to the surface of the material 10 is removed. Quantities of the liquid overflowing to the surfaces of the members A and B are appropriately adjusted in accordance with the kind of the photosensitive material, processing time, etc., by appropriately selecting the hydraulic pressure inside the members A and B, diameters of the holes in the material on the surfaces of the members A and B, contacting pressure between the surfaces of the members A and B and material 10, etc. Therefore, liquid removal is effectively performed without producing damages and processing unevenness on the surface of the photosensitive material.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a method for removing liquid from an automatic processor for silver halide photographic materials (hereinafter referred to as an automatic processor), and more specifically relates to a method for removing liquid from an automatic processor for silver halide photographic materials. This invention relates to a new liquid draining method that does not cause uneven processing.

(Prior Art) Various liquid draining techniques have been known (SPSE Handbook (1973), p.
, 640).

These include air knife method (1), vacuum removal method C), Vencherry type air squeegee method (3), opposed roller squeegee (4), and rotating puff squeegee (5).
), wiper blade squeegee (6), etc. are known, and each has advantages and disadvantages, and there are limits to the automatic processors to which they can be applied. (1) to (3) require thick equipment such as a compressor, and maintenance of the nozzle part is difficult, so only large automatic processors can be used. (5) to (6)
Although it depends on the form of the photosensitive material, in general, the emulsion surface is easily scratched and daily cleaning is essential. (4) has relatively few restrictions on the shape of the photosensitive material (it is mainly suitable for processing sheet-like photosensitive materials, but in the case of large-sized sheet-like photosensitive materials, poor forming accuracy of long rollers can easily cause processing unevenness). Furthermore, if the nip pressure is increased to reduce the amount of liquid carried in, there is a drawback that conveyance errors are likely to occur and scratches are likely to occur.Therefore, in this method, the level of carry-in is usually 2 to 6M1/4. At the liquid carry-in level, if the roller nip pressure was poorly controlled, uneven processing would easily occur and precipitation of the processing liquid would easily occur.

(Problem to be Solved by the Invention) In order to correct some of these drawbacks in the method (4), a water-absorbing flexible member may be used as a member of the roller.

This allows you to increase the nip pressure without causing scratches. However, if the roller member is not cleaned, deposits may adhere to its surface, resulting in scratches or uneven processing. In any case,
Various improvements have been made to method (4), but no method has been established that can overcome all of these problems.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method that overcomes the above-mentioned drawbacks. Furthermore, it is an object of the present invention to provide a novel liquid draining method that has high liquid draining efficiency, maintains a permanent liquid draining effect, and does not cause processing unevenness or processing scratches.

(Means for Solving the Problems) The present invention provides a method in which a liquid overflowing from inside the member is provided on the surface of the photographic material conveying member of an automatic developing device for silver halide photographic materials, and the surface of the photographic material is transported by the surface of the member. A liquid removal method for an automatic developing device is characterized in that the processing liquid adhering to the surface of the photographic material is removed by pressing the photographic material into contact with the surface of the photographic material, thereby solving the above-mentioned problems and achieving the present object.

In the present invention, the amount of liquid (hereinafter referred to as overflowing liquid) to be spilled from the inside onto the surface of a conveying member for draining the photographic light-sensitive material is determined by the type of photosensitive material, the processing time,
etc. will be adjusted accordingly.

In this case, the adjustment method may be, for example, by appropriately selecting the hydraulic pressure inside the conveying member, the pore diameter of the surface material of the conveying member, the contact pressure between the surface of the member and the surface of the sensitive material, etc.

Preferably, the conveying member in the present invention includes a roller. In this case, it is preferable to use the low method to deal with the overflowing liquid, and to apply pressure only when processing is being carried out, in conjunction with the replenishment of processing liquid detected when the photographic material is inserted into the automatic developing device. , and the overflow amount is 0.5 to 5 per minute of photosensitive material processing time and 1 minute of roller light.
0d is preferred.

In the present invention, the overflowing liquid is separated from the surface of the member together with the processing liquid when the processing liquid adhering to the photosensitive material is drained.
The surface of the component is adjusted as described above so that it is constantly wetted with overflow liquid during processing. At this time, the drained liquid including the overflowing liquid may be treated as desired, but it is advantageous to use it together with the treatment liquid immediately before draining. Therefore, the composition of the overflow liquid (water alone may be used) can be appropriately selected as desired. In this case, for example, when the draining liquid is a black and white developer, a color developer, or a bleach-fixer, as a preservative,
It is preferable to use an aqueous solution containing 0.3 to 30 g/12 of sulfite, dicarboxymethylhydrazine, hydroxyamine, hydroxyamine derivative, organic sulfinate, etc. as the overflow liquid.

If such an aqueous solution is an overflow liquid, the overflow amount will be 0 when the photosensitive material processing time is 1 minute and the roller 1 is exposed to light during normal processing.
．． 5 to 20 d is preferable, and when the roller rest period is 2 hours or more, it is preferable to adjust the overflow to 5 to 50 d at the beginning of processing of the sensitive material. Further, the conveying member such as a roller to which the present invention is applied can be used for conveying the photosensitive material throughout the photosensitive material processing process. Especially on the liquid level of processing liquid tanks divided by processing function (black and white or color developing tank, bleach tank, bleach-fix tank, fixing tank, washing tank, stabilization tank, intermediate tank, reversal tank, neutralization tank, etc.) Commonly used for certain conveyance members.

If the automatic processor consists of a developing tank, a fixing tank, a washing tank, and a drying section, the period from the completion of development processing to the time before moving to the fixing tank, and from the completion of fixing processing to the time before moving to the washing tank. It is preferable to set at least one, so that draining liquids of processing liquids with different processing functions are recycled without mixing.
The amount of processing liquid to be refilled can be significantly reduced.

The present invention can be applied to any photosensitive material, but in particular, the hydrophilic colloid layer such as an emulsion layer has a thickness of 5 μm or more, preferably 10 to 4 μm.
It is particularly effective for preventing scratches on the emulsion surface in the case of 0 μm photosensitive materials, such as multilayer photosensitive materials, especially multilayer color photosensitive materials (color paper, color negative film).

Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto.

(Example 1) FIG. 1 is a schematic diagram of a black-and-white developing machine to which this method can be applied. This automatic processing machine can also process so-called color paper in the same way. That is, when used for color paper, it is sufficient to put a color developer into the developing tank (1) and a bleach-fixing solution into the fixing tank (2).

The conveying member for the silver halide photographic material (10) in this method is composed of a group of conveying rollers (9).
), first, the material (10) is placed in the film insertion part (7).
), the inserted material (10) is detected by the film detection section (8), and then transferred to the developer tank (1), the fixing tank (2), and the washing tank (3) in sequence by the transport roller (4). ,
It is conveyed to a squeeze tank (4) and a drying tank (5) to form a film (6), where it is completed.

In FIG. 1, the liquid is drained in this method by the conveying roller (A) provided on the developing tank (1) side of the conveying roller (9) and the conveying roller (B) provided on the fixing tank (2) side. The system is configured to implement the following.

FIG. 2 shows the parts of the conveyance rollers (A) and CB) in more detail.

(11) indicates the bearing of the roller, (12) indicates the shaft of the roller, (13) indicates the transmission gear connected to the roller, and (14) indicates the pipe for introducing overflow liquid between the shaft and (12). There is no leakage of liquid as it is joined in a slotted manner.

(15) shows the pump that moves the overflowing liquid. (16) shows the overflowing liquid tank. When the sensitive material is processed, the pump (15) is activated by an electric relay, and the overflowing liquid passes through the piping (14) and the porous hole. The overflow liquid is caused to overflow from the sex member (21) onto the surface of the member.

(20) is a transport roller (
A) or (B) shows the whole. (23) shows a core material having a large number of openings (22) for fixing the porous member.

The arrow shows how the aqueous solution permeates into the porous member (21) from the opening (22) due to the pressurization of the pump (15) when the electric relay is activated, and the overflowing liquid gradually overflows onto the surface of the porous member (21). Ta.

A PVC pipe was used as the core material (23). The porous member is Rubicel E) I-2510 manufactured by Toyo Polymer ■ (polyurethane elastomer pore diameter approximately 8 μm; porosity 80% density 0.25)
g/cd) was used.

Although black-and-white development and color development were performed separately for about 2 months according to the method of the present invention, no troubles such as scratches or clogging of the photosensitive material occurred.

Furthermore, in black and white development, the pH increase in the fixing solution in the tank was significantly lower than in conventional processing (using conventional rollers without using draining conveyance roller (A)).

This means that the liquid draining effect is large.

Similarly, the amount of fixing agent contained in the water in the washing tank was analyzed using black and white development.

Similarly, it was found that the liquid draining effect was large.

[Example 2] A color paper ((Eftafrom Paper 2001 (Eastman Kodak)) consisting of a silver chloride emulsion was
The image was developed using an automatic developing machine using the following processing steps.

The composition of each treatment liquid is as follows.

Hidachi Nimori-e Okasui 80
0dethylenediamine-N,N,N'.

N”-tetramethylenephosphonic acid 1.5g Methyltriethylenediamine (1,4-diazabicyclo(2,2,2)octane) 5.og Sodium chloride 1.4g Potassium carbonate 25g N-ethyl-N
-(β-methanesulfonamidoethyl)-3-methyl-4-aminoaniline sulfate 5.0gN, N-
Dicarboxymethylhydrazine 5.0g Fluorescent brightener (UVITEx (J Ciba Geigi) 2.0g Add water to 1000dpH (25
℃) 10.10 111 feet 1 hill water 40
0m! Ammonium thiosulfate (70%) 10
0d Sodium sulfite 18g Ethylenediaminetetraacetic acid iron (I[I) Ammonium 55g Ethylenediaminetetraacetic acid disodium 3g Ammonium bromide
40°glacial acetic acid
Add 8g water and 10
00dpH (25℃) 5.5 Water washing Ion exchange water (calcium, magnesium 3pp each
-Below) -Dapa (Bath liquid for roller A in Figure 1) N,N-dicarboxymethylhydrazine Ig#! -da
(Bath liquid for roller B in Figure 1) Sodium sulfite 3g/i.

In this method, the amount of liquid overflowing from rollers A and B is
The distance was 25-30m. Moreover, rollers A and B
was controlled so that it oozed out only during processing of the photosensitive material.

The photosensitive material was processed at a rate of 0.3 per day for about one month. Various performances at this time were compared between a conventional method using a conventional roller and the method of the present invention.

Q: Good, Δ: Fair, ×: Poor In addition, the pH of the bleach-fixing solution: a, and the amount of ammonium periosulfate (70%) in the washing tank (I11/l): b were as follows.

The following results show that this method prevents all physical failures such as uneven processing, processing scratches, and roller stains, and has a higher liquid draining effect than the conventional method.

[Example 3] In Example 2, the photosensitive material was processed at an average rate of 0.1 rrf per day, and the temperature was controlled for 3 days per week during the process, and the processing was continued for about 3 months without treatment. When the time and temperature were controlled and untreated, the amount of overflowing liquid was set to be 50 to 60 d per 1 d of sensitive material.

The amount of preservative in the color developer and bleach-fixer after the March running, i.e. dicarboxymethylhydrazine in the color developer: c, sodium sulfite in the bleach-fixer: d
were analyzed and compared.

In the conventional method, the bleach-fix solution was sulfurized, but with the roller of the present invention, no sulfurization of the bleach-fix solution was observed.

When we investigated the change in sensitivity to the new liquid when passing it through color paper, we obtained the following results.

Conventional rollers that use rollers have a significant reduction and cannot be used. On the other hand, in Example 20, the method of the present invention, the degradation was suppressed to 1/3 to 1/4.

Further, in the method of the present invention in this example, the change in photographic properties was approximately at an acceptable level.

(Effects of the Invention) By using the conveying member of the present invention, it is possible to drain the liquid extremely effectively without damaging the surface of the photosensitive material, and therefore the amount of replenishment of the processing bath can be significantly reduced. The liquid can be drained stably and efficiently at all times, the life of the photosensitive material processing liquid can be effectively extended, and it can be carried out with a relatively simple equipment configuration, reducing the cost of processing the photosensitive material and improving the quality of the processed photosensitive material. can be measured.

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining the method of the present invention, and shows a schematic configuration of an automatic processor. FIG. 2 shows a configuration example of a conveyance member to which the present invention is applied, and also shows a cross section of a conveyance roller. (Explanation of symbols) 1: Developing machine, 2: Fixing tank, 3: Washing tank, 4: Squeeze tank, 5: Drying tank, s A: Feed 1iLl! , 6; film packet, 7
: Film insertion part, 8: Film detection part, 9, A, B:
Conveyance roller, 10: Photographic material, 11: Bearing part, 12
: Shaft part, 13: Transmission gear, 14; Piping, 15; Pump,
16] Overflow tank, 20: *Feeding roller (A) or (B), 21: Porous member, 22: Opening. (3 others)

Claims (1)

[Claims] A surface of the photographic material conveying member of an automatic developing device for silver halide photographic materials is provided with a liquid overflowing from inside the member,
A liquid draining method for an automatic developing device, characterized in that a processing liquid adhering to the surface of the photographic material is removed by pressing the surface of the photographic material with the surface of the member.