JPS6028338B2 - Automatic film developing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that fully automatically performs a series of processing steps for unprocessed photographic film, particularly X-ray film, from development to fixing, washing, and drying, and it uses a conventional storage liquid. This system eliminates the use of a tank to create the minimum space necessary for the film to pass through, and then fills the space with liquid pumped by a pump to contact the film being transported. One of its purposes is to create a space between the inlet and outlet. The purpose is to provide a device that has the shortest distance between the rollers and the maximum effective length of contact with the processing liquid.Another purpose is to ensure that the film is always transferred in a straight line, thereby eliminating the guide caused by bending. Eliminates saddle contact with boards etc.
Its purpose is to enable safe and reliable film feeding without causing scratches on the film surface, and its other purpose is to have a simple structure and miniaturization, making it easier to carry out developing work in darkrooms with limited installation space. The aim is to provide a device that can do this at a low cost.

The details will be explained below with reference to the embodiment shown in the drawings. Reference numeral 1 denotes a gap for film passage formed by vertically opposing two guide plates la and lb. Feed lofts 4, 4', 5, 5' are provided, and both left and right sides of the gap 1 are closed.

6 is a pipe for supplying developer, etc., and the tip opening 6
A is connected to open between both guide plates la and lb, and the liquid in the storage tank 7 is pumped up by a pump 8 and continuously pumped into the gap 1 during operation.

Reference numeral 9 is a receiving tray for the guide plates la, lb, feed rollers 4, 5, etc., which is a hopper type with an open top and is fixed to the stereotaxic calendar, and the scale liquid port 1 at the bottom is connected to the return tube 11. By making its tip end 113 face into the storage tank 7, the surplus liquid flowing out from the gap 1 is circulated from the bottom of the saucer 9 through the return tube 11 into the storage tank 7.

A replenishing liquid dust 14 having an automatic opening/closing valve 13 at the cockpit 12 is attached to the storage tank 7, so that a fixed amount of liquid is always replenished according to the consumption of the liquid in the storage tank 7. Reference numeral 15 denotes a heater that heats the liquid in the storage tank 7, and a constant temperature is always maintained by detection by a thermostat 16.

FIG. 1 shows a case where a developing section 17, a fixing section 18, and a washing section 19 are formed in series.
8 and between the fixing section 18 and the water washing section 19, one roller is used to feed both the inlet side and the outlet side, and the tray 9 is also not single as shown in Fig. 3, but in a series. is used.

However, in this case, in order to prevent the liquids supplied to each part from mixing, a blade 21 made of an elastic piece or the like is brought into elastic contact with the lower rollers 4', 5' to partition the liquids. A drying section 20 is provided on the outlet side of the washing section 19,
Hot air is applied to the film immediately after washing, which passes through the roller group 22, to instantly dry the film. 23 is the blower, 24 is the heater, and 26 is the main body case of the dryer.

As shown in FIG. 2, several ribs 26 are formed on the opposing inner surfaces of the upper and lower guide plates la and lb, thereby reducing contact with the film and preventing scratches on the film surface.
Also, the flow of liquid can be directed. In the above configuration, when the exposed film F is inserted into the insertion slot 28 of the main body 27, the film is transferred to the rollers 4 and 4' on the entrance side.
From there, it is fed into the gap 1 between the guide plates la and lb which are vertically opposed to each other.

On the other hand, a liquid (developing solution) pumped up by a pump 8 is constantly supplied into the gap 1 through a pipe 6, and the liquid pumped into the gap fills the gap 1 and then enters the inlet 2 and outlet 3.
and is received into the saucer 9. Therefore, when the film F is fed into the gap 1 filled with flowing liquid, the liquid comes into contact with both the upper and lower surfaces of the film under pressure, compared to the conventional method in which the film immerses in a stationary liquid. The effect is significantly promoted. Thereafter, this film enters the next fixing section 18 and water washing section 19 from the outlet 3 via the low hoods 5 and 5'. In the fixing section and washing section, the liquid pumped up by the pump undergoes the same processing action as the developing section 17, except that the liquid pumped up by the pump is a fixing solution or washing water. After washing the fixing section, the liquid is sent out of the machine from the outlet 29 via the drying section 20. It will be done. The surplus liquid from each part that has flowed out into the saucer 9 is returned to the corresponding storage tank 7 via the return pipe 11. However, the film F passing through each section is 2 from the entrance side.
The film advances in a straight line to the exit side through the gap between the two guide plates, and the entire distance between the front and rear rollers 4 and 5 is a processing step, so a series of film development processes is effective because there is no waste during the feeding process. And it will be done properly and very quickly.

For example, as shown in Fig. 4, a conventional automatic film developing device that performs a series of processes including development, fixing, washing, and drying in a fully automated and continuous manner has been known. The processing liquids are stored in a storage tank, and the film is deposited in each liquid through rollers and guides.
Because it is bent due to this concession, the effective distances a, b, and c at each part are very short, but the play distances A and B between them are nevertheless long, and the overall length is quite large. However, there are drawbacks such as the fact that the surface of the film is easily damaged due to forced bending, and that reactions with chemicals are not effective because the film only immerses in stationary liquid. The present invention addresses these conventional drawbacks, and as described above, the film is passed between the two vertically opposed guide slopes from the entrance side at the front end to the exit side at the rear end. In addition to forming the necessary narrow gap, a single liquid inlet is provided on the side of this gap, facing upward and downward with the film passage section as a boundary, and the liquid flows in through this opening, thereby allowing the liquid to flow into both the upper and lower surfaces of the film as it passes through. Since the liquid is brought into contact with the liquid, the narrow gap is reliably filled with liquid by simply pumping the liquid from one liquid inlet opened on the side, and even when the film is continuously passed through, the film remains constant. It is possible to develop both the upper and lower surfaces evenly, and there is no need to competitively supply developer to the upper and lower sides, and it can be supplied from a single inlet from the center of the side, which is advantageous from both a structural and operational standpoint. This has the effect of being able to be implemented at low cost.

[Brief explanation of drawings]

The drawings show an embodiment of the device of the present invention, in which Fig. 1 is a side view of the whole with a partial cross section, Fig. 2 is a longitudinal front view of the same, and Fig. 3 is an enlarged longitudinal sectional view of the main part. shows a single thing. FIG. 4 is a longitudinal sectional side view of the subordinate device. 1... void,
2... Inlet, 3... Outlet, 4, 4'... Entrance side feed low fu, 5, 5'... Outlet side feed low fu, 6... Supply pipe, 7... ...Storage tank, 8...Pump, 9...Saucer, 10...Drain port, 11...
・Return tube, 17...Developing section, 18...
- Fixing section, 19...Water washing section, 21...Blade, 26...Rib, la, lb...Guide plate. O'Kaizai no Kousai〃Zutai 3 diagrams

Claims (1)

[Claims] 1. A narrow gap necessary for passing the film from the entrance side of the front end to the exit side of the rear end is formed between two guide plates facing each other vertically, and One liquid inlet opening is provided on the side of the gap so as to face the top and bottom with the film passing part as a boundary, and the liquid flows in through the opening, and the liquid is brought into contact with both the upper and lower surfaces of the film passing through, and the liquid is brought into contact with the upper and lower surfaces of the film passing through the inlet side of the gap. An automatic film developing device characterized in that a pair of upper and lower feed rollers provided on the exit side and the guide plate are arranged on a tray. 2. A set consisting of two guide plates, a feed roller, and a tray constituting the gap is used as a developing section, and a fixing section and a washing section having the same structure as the developing section are connected to this. An automatic film developing apparatus according to claim 1. 3. According to claim 2, a blade for partitioning the liquid is in elastic contact with the lower roller of the feed roller at least between the developing, fixing, and washing sections. automatic film developing device.