JPS6239856A - Automatic developing device - Google Patents

Abstract

PURPOSE:To reduce the development nonuniformity with simple constitution by disposing a conveyance roller positioned in the vicinity of the interface of a treatment solution so that a photosensitive material can be conveyed by touching the conveyance roller after said material directly comes into contact with the treatment solution. CONSTITUTION:The photosensitive material 4 is conveyed to a developer tank 15, a fixer tank 16..., in this order, with their emulsion surfaces upward. After the photosensitive material 4 directly comes into contact with the treatment solution the conveyance rollers 1a and 1b which the material 4 in each tank is carried in can convey the material. Moreover the title device s so constituted that the contact O of the conveyance rollers 1a and 1b can be lie below the liquid surface 5 of the treatment solution. Accordingly, the photosensitive material 4 comes into contact with the treatment solution to start processing before it contacts the conveyance rollers 1a and 1b, and therefore there s not concern that the treatment solution attaching to the conveyance roller 1b is transferred to the photosensitive material 4, which is developed. Moreover a strip-like development nonuniformity caused by the conveyance roller in the direction orthogonally intersecting the conveyance direction can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an automatic developing apparatus for developing a photosensitive material by conveying it through a processing liquid using a conveying roller.

(Background of the Invention) When developing a photosensitive material to obtain an image, an automatic developing device is commonly used to achieve mass processing, labor savings, and stable quality.

Among such automatic developing apparatuses, there is one in which a photosensitive material is guided into a processing liquid tank by a conveyance roller, and is developed while passing through a conveyance path formed by a conveyance roller disposed in the processing liquid.

The photosensitive material transported in this manner is, for example, transported along a transport path 3 formed by transport rollers la, lb and a guide 2, as shown in FIG. Some are processed, and others are transported with the emulsion side facing upward as shown in FIG.

(Problems to be Solved by the Invention) In either case, the conveyance rollers la and lb on the side where the photosensitive material 4 is carried to the liquid level 5 of the processing liquid are processed by the conveyance roller 1b located on the lower side. submerged in liquid. Therefore, the processing liquid adhering to the conveyance roller 1b adheres to the emulsion surface of the photosensitive material 4, and is then conveyed into the processing liquid.

By the way, since the photosensitive material 4 has good development progress in the initial stage due to its characteristics, the development progresses by the transfer of the processing liquid to the conveyance roller lb, and the photosensitive material 4 is developed in a direction perpendicular to the conveyance direction. There is a risk that unevenness may appear silky.

The present invention was made against the background of the above circumstances, and an object of the present invention is to provide an automatic developing device that has a simple structure and reduces uneven development.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides an automatic developing apparatus that conveys a photosensitive material through a processing liquid using a conveyance roller and processes it for development. After bringing the nearby conveyance roller into direct contact with the photosensitive material or processing solution,
It is characterized by being arranged so that it is conveyed in contact with a conveyance roller.

(Function) In the present invention, after the photosensitive material comes into contact with the processing liquid, it is conveyed by a conveyance roller located near the liquid surface. This prevents striped development unevenness from occurring on the photosensitive material due to the conveyance roller.

(Example) Hereinafter, an example of this invention will be described in detail based on the accompanying drawings.

In the figure, reference numeral 11 denotes an apparatus main body of an automatic developing apparatus that blocks external light, and a supply table 12 is provided on one side of the apparatus main body 11. A photosensitive material 4 , such as a roll or sheet-like film, which has been exposed to an image, is supplied from this supply table 12 into the apparatus main body 11 .

A photosensitive material intake port 13 is provided on the supply table 12 side of the apparatus main body 11, and a large number of transport rollers la and lb are provided inside the apparatus main body 11, which are driven at a constant speed by a drive device (not shown). As a result, a meandering conveyance path 14 is formed.

The developer solution $115 is placed next to each other along this conveyance path 14.
, a fixing liquid tank 16, a washing liquid tank 17, and a drying section 18 are provided, and a predetermined amount of processing liquid is stored in these processing liquid tanks.
Each is maintained at a predetermined temperature. Note that when processing the color photosensitive material 4, bleach-fixing is performed.

The photosensitive material 4 is conveyed with the emulsion side facing upward through the developer tank 15, the fixer tank 16, and the washing liquid tank 17, and the photosensitive material 4 in each processing liquid tank is conveyed by transport rollers la and l on the side into which the photosensitive material 4 is carried.
b is arranged so that after the photosensitive material 4 comes into direct contact with the processing liquid, it is transported by transport rollers la and lb.

That is, as shown in FIG. 2, the contact point 0 of the conveyance rollers la and lb into which the photosensitive material 4 is carried need only be at least below the liquid level 5 of the processing liquid.

This liquid level 5 is located at a distance in the tangential direction from the contact point O of the pair of transport rollers la and lb, and in this embodiment,
For example, the liquid level 5 is located at a distance of 10 mm or more. This distance is the processing liquid, conveyance roller la
, lb and the roller diameter.

Next, the operation of this embodiment will be explained.

When the automatic developing device is driven, the conveyance rollers 1a and lb are rotated in conjunction with each other by a drive device (not shown).

The photosensitive material 4 is placed in a developer tank 15 with the emulsion side facing upward.
It is transported through a fixing liquid tank 16 and a washing liquid tank 17, and is processed with the processing liquid in each processing liquid tank.

At this time, the photosensitive material 4 is transferred to the transport roller la on the side to be carried in.
, lb, and then comes into contact with the processing liquid, and is then transported within the processing liquid by transport rollers la and lb.

In this way, the photosensitive material 4 uniformly contacts the processing liquid before contacting the transport rollers la and 1b to start processing.
It is not transferred to and developed. Therefore, it is possible to reduce the occurrence of striped development unevenness caused by the conveyance roller in the direction perpendicular to the conveyance direction of the photosensitive material 4, which is conventional.

FIG. 3 shows another embodiment, in which the photosensitive material 4 is transported with its emulsion side facing downward. Then, the transport rollers la, l on the side where the photosensitive material 4 is carried into the processing liquid
Both points b are placed in the processing liquid, and the distance between the contact point O and the liquid level 5 is set to be long.

In addition, in the above embodiment, the conveyance roller la of the developer tank 11,
lb was explained, but the fixing liquid tank 16 and the washing liquid tank 17
The same applies to the conveyance rollers la and lb.

Furthermore, although conveyance rollers la and lb have flat surfaces, they may have recesses in the circumferential direction.

(Effects of the Invention) As described above, the present invention is arranged so that the conveying roller located near the surface of the processing liquid is arranged so that the photosensitive material is conveyed in contact with the conveying roller after it comes into direct contact with the processing liquid. The processing liquid that has adhered to the conveyance roller does not adhere to the emulsion surface of the photosensitive material, and development unevenness in the vertical direction caused by transfer of the conveyance roller to which the processing liquid has adhered is prevented.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an automatic developing device to which the present invention is applied, FIG. 2 is a schematic diagram of the main parts, FIG. 3 is a sectional view showing another embodiment, and FIGS. FIG. 3 is a cross-sectional view of the developing device. la, 1b --- Conveyance roller 4...Photosensitive material 5...Liquid level 15...Developer tank 16--Fixer tank Fig. 2 Fig. 4

Claims (1)

[Claims] In an automatic developing device that transports a photosensitive material through a processing liquid using a transport roller for development processing, the transport roller located near the surface of the processing liquid is moved to the transport roller after the photosensitive material comes into direct contact with the processing liquid. An automatic developing device characterized by being arranged so that they are conveyed in contact with each other.