JP2919638B2 - Developing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for developing a photosensitive material film for printing or medical use, and more particularly, to a film for a scanner, a film for a line drawing, a film for a photography net, The present invention relates to a developing section of a high-speed automatic developing machine capable of processing various films such as a film for use.

[0002]

2. Description of the Related Art The above-mentioned high-speed automatic developing machine is used for rapid processing,
It has excellent characteristics such as the same processing time and the same processing, but on the other hand, due to its characteristics, it has been studied that it is susceptible to fluctuations in development conditions, etc., and tends to cause uneven development. It became clear.

Further, it has been found that uneven development caused by circulation of the developer is one of the causes of uneven development.

[0004]

As measures against so-called development unevenness (circulation unevenness), there are a method using a chemical property of a developer and a method of changing a mechanical configuration of an apparatus. There are many factors and versatile countermeasures are difficult. For this reason, measures from a mechanical point of view are also desired. However, from this point of view, there has conventionally been a problem that data is not sufficient, and it is actually difficult to take certain measures.

The present invention has been made based on such considerations, and an object of the present invention is to provide a developing apparatus capable of suppressing development unevenness (circulation unevenness) and performing stable processing.

[0006]

According to the present invention , a plurality of liquid tanks are provided.
The transport rollers of the
An image path is formed in the liquid tank, and the
And blow the developing solution from the side, in the direction of travel of the photosensitive material.
By circulating the developer in the direction crossing the
A development device that performs development, and the entire development path length is 100%
Rectifier plate only in the initial part from 0 to 40%
And the flow velocity of the photosensitive material surface in the initial part is
Controlling in the range of 10cm / sec-30cm / sec
Monodea Ru. Here, the development path length refers to the length of the submerged transport path from the entrance to the developer to the entrance to the next processing liquid.

[0007]

[0008]

According to various studies, it has been found that circulation unevenness almost always occurs at the beginning of development (3 to 5 seconds from the start of development). As a result of the analysis, the cause of the uneven circulation was that the active component of the developing solution did not uniformly penetrate into the emulsion layer of the photosensitive material depending on the surface condition of the photosensitive material. Then, where the penetration was early, the image density was increased, resulting in unevenness. In order to prevent this, it is effective to uniformly penetrate in the early stage of development, and for that purpose, it is effective to make the movement of the processing solution uniform near the emulsion surface. It is an invention.

Further, it has been found that there is a correlation between the circulation unevenness and the flow rate through experiments such as measuring the change in the flow rate at a plurality of points separated by a predetermined distance from the outlet of the developer while changing the flow rate. It was also found that the range of 10 cm / sec to 30 cm / sec around the flow rate of 15 cm / sec was a range in which the uneven circulation could be suppressed.

Therefore, by controlling the flow rate to a predetermined value in the initial part by using the circulation control means, the development processing can be stabilized.

[0011]

Next, an automatic developing machine as shown in FIG. 3 (film insertion table 10, developing section 11, fixing section 12, washing section 13, drying section 1).
An embodiment in which the present invention is applied to the developing unit 11 of (4, provided with a film receiving table 15) will be described.

The developing unit 11 is provided with a developing rack as shown in FIG. 1 (a lower left diagram in FIG. 1 is a front view, an upper left diagram is a plan view, and a lower right diagram is a side view). . This developing rack is provided with a number of film transport rollers (load rollers 1, transport rollers 5a, 5b, etc.), guide plates 3, rectifying plates (circulation unevenness preventing plates) 4, and blowout ports 6, 7. ing.

Initial part (encircled by a dashed line in the figure) 2
Is defined as 100% when the development path lengths AB (the distance from the liquid surface immediately after the carry-in roller 1 to the next liquid surface via the developer) are 100%. 5 seconds). In this portion, the guide plate 3 and the rectifying plate 4 (having the notch 9) are formed in the form as shown in FIG.
Is attached to adjust the flow of the developer discharged from the outlets 6 and 7. The blowing velocity is also adjusted to an optimum value, whereby the flow velocity on the surface of the photosensitive material film is controlled in the range of 10 cm / sec to 30 cm / sec.

As a result of performing the development processing with such a configuration, it was confirmed that the occurrence of so-called wave unevenness or wakame unevenness which occurs at the time of poor circulation was sufficiently suppressed.

The present invention can be widely applied to the development of camera films, the development of X-ray sensitive materials, and the like.

[0016]

As described above, according to the present invention , the current plate
Can be arranged most efficiently and development unevenness is likely to occur.
The flow on the surface of the photosensitive material in the initial part of
The flow rate can be controlled to a range suitable for Therefore, according to the present invention,
This makes it possible to realize a developing device with a simple configuration that can suppress the occurrence of development unevenness and reliably obtain a stable finish.
You .

[Brief description of the drawings]

FIG. 1 is a diagram showing a specific configuration (configuration of a developing rack) according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a mounting form of a guide plate 3 and a rectifying plate 4 in the developing rack of FIG.

FIG. 3 is a diagram illustrating an overall configuration of an automatic developing machine.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 carry-in roller 2 initial part 3 guide plate 4 rectifier plate 5 a, 5 b transport roller 6, 7 outlet 9 cutout part 10 insertion stand 11 developing part 12 fixing part 13 washing part 14 drying part 15 film receiving stand

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-205847 (JP, A) JP-A-55-52059 (JP, A) JP-A-59-165061 (JP, A) 5154 (JP, U) Special Table Hei 5-504636 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G03D 3/00-17/00

Claims (1)

(57) [Claims] A plurality of transport rollers are provided in a liquid tank,
Forming a development pass in the liquid tank through which the photosensitive material passes
At the same time, the developer is blown out from the side toward this development pass.
And develop in a direction crossing the direction of travel of the photosensitive material
This is a developing device that performs development by circulating liquid.
When the entire development path length is 100%, the rectifying plate is disposed only in the initial portion from 0 to 40% , and the flow velocity of the photosensitive material surface portion in the initial portion is 10 cm / sec. a developing device according to claim and Turkey be controlled in the range of 30 cm / sec.