SU491920A1 - A device for transporting processed photographic materials through a reservoir. - Google Patents

Description

one

This invention relates to the field of photochemical processing of photographic materials.

Devices are known for transporting photographic tape photographic materials, mainly roll photo paper, through a reservoir, which contain an outer and an inner case, a tape mechanism in the form of an endless tape, against which the material is pressed due to the pressure difference in the liquids in the outer and inner cases.

The outer casing is separated from the internal perforated partitions, through the openings of which the processing liquid enters the internal suction chamber.

However, there are some difficulties in processing photographs wider than 35 mm, especially when fixing the beginning of the tape.

To simplify the design and increase the reliability of processing in the proposed device, the suction case is divided by a partition located in the plane of the axes of the transporting rollers, the lower of which is made with perforations, into two chambers forming a through suction channel connected on one side by the suction port and, on the other hand, through the inlet of the suction case, located below the level of the processing liquid on

the side opposite to the suction inlet, while the movement of the suction jet in the suction channel is opposite to the direction of movement of the transported material, and the suction case with

the lower and upper guide rollers and the endless conveyor belt can be detachably connected to the pump in the reservoir. The drawing shows an example implementation

transporting device.

In the treatment tank 1, which is filled with a processing liquid, for example, a developer, a pump 2 is located, in the body of which a pump tube 3 is inserted, in

which rotates the impeller 4, driven by the motor 5. On the casing of the pump 2 a transporting unit is fixed, consisting of the suction casing 6 and 7 and the top 8 guide rollers. The endless conveyor belt 9 passes through the suction body 6 and the guide rollers 7 and 8. The conveyor belt is made of a material that is not exposed to the processing liquid, for example, wire mesh or synthetic material.

A gear 10 is non-movably connected to the upper roller 8, which is engaged with the gear wheel 1 in the tank. The suction body 6 has, on the side facing the iK conveyor belt 9, a large number of suction holes 11. The roller 7 designed as a cylinder also has the same suction holes 11 on the outer side surface. Cornus 6 is hermetically closed at the top and has an opening in its lower part which includes the role-to-7.

A vertical wall 12, which extends to the lower guide roller 7, divides the suction case 6 into two identical suction chambers 13 and 14. Below the liquid level 15 indicated in the drawing, on the side of the suction chamber 13 facing the narrow side of the pump housing 2, suction holes 16 located against the hole in the pump casing 2 on the suction side of the pump impeller 4.

Sealing agent provides when

From the transport device, there is a tight connection between the two openings. On the narrow side of the suction chamber 14, facing away from the pump casing 2, there is an inlet 17.

A through suction passage is formed within suction inlet 16, suction chamber 13, unfilled space extending from lower guide roller 7 and lower edge of dividing wall 12, suction chamber 14 and inlet 17. The direction of suction flow shown in the drawing is opposite to that transported substrate.

The device works as follows.

By suction produced by the impeller of the pump 4, a vacuum is created in the suction duct 18. When the conveyor belt 9 moves through the guide roller 8 in the direction shown by the arrows, the beginning of the backing is fed from the side of the belt 9 to the belt 9. In this case, the suction holes 11, which are in contact, are covered with a substrate, and therefore between the substrate and the wall with the holes 11 of the chamber 13 there arises such a suction force that it fully provides the necessary pressing of the substrate to the conveyor belt 9. Regardless of which place will be the substrate, there is always the same absorption for the entire length of the incoming substrate.

As soon as the front edge of the substrate reaches side B (outlet), all suction ports 11 are opened. The circulation required for the liquid circulation process is ensured by the fact that the liquid enters the suction canal 18 through the inlet 17 and again enters the reservoir through the tube of the pump 3 and rushes upwards, washes the substrate.

Claims (2)

1. A device for transporting the processed photographic materials through a reservoir, preferably a roll photo paper, the substrate of which is pressed by suction to an endless conveyor belt, covering the suction case with holes, immersed in the tank and connected to the pump, as well as the lower guide roller with suction holes, closing the suction case below, and the top guide roller, characterized in that, in order to simplify the design and increase the reliability of processing, the suction case is divided by a partition located in the plane of the axes of the transporting rollers, the lower of which is made with perforations, into two chambers, forming a through suction duct connected on one side through a suction opening to the pump suction zone, and on the other sides through the inlet of the suction case, located below the level of the processing liquid on the side opposite to the suction inlet, while the movement of the suction jet in the suction channel is opposite to the direction of movement of the transported material. 2. An apparatus according to claim 1, characterized in that the suction casing with lower and upper guide rollers and an endless conveyor belt is detachably connected to a pump located in a reservoir. AT ten eleven