JPH0637417Y2 - Photo development equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a photographic developing device for performing reversal exposure on a photosensitive material.

[Background Art] When obtaining a transparent positive image directly on the film negative film,
When forming a positive color image on color reversal paper, it is necessary to perform so-called reverse exposure on the photosensitive material during the development process.

Generally, a fluorescent lamp or an electroflash is used as the reversal exposure means. For this reason, a large space is required in the exposed portion, and it is necessary to provide a shielding plate for preventing light leakage, and the power source portion causes an electrical failure due to the developing solution.

In consideration of the above facts, the present invention has an object to obtain a photographic developing device which does not need to provide a special light shielding plate in a small space and eliminates the possibility of power failure due to a developing solution.

[Outline and Function of the Invention] The photographic developing apparatus according to the present invention is the first development processing tank with the first development processing tank.
In a photographic developing device for performing image processing by reversal exposure of a photosensitive material before completion of the developing treatment of No. 2 and being immersed in the second developing treatment tank, the photosensitive material was hung on a side plate in the second developing treatment tank. One end of an optical fiber, which is disposed on the upper end surface above the processing liquid surface of the block and guides light for reverse exposure of the photosensitive material before being immersed in the second developing processing tank, exposes its irradiation opening. An embedded holder and a photosensitive material which is disposed above the holder and holds the photosensitive material in the second developing tank by a conveying path formed by the block, and leaks light from the irradiation opening together with the block. And a light source which is provided at a position distant from the second development processing tank and which allows light for reverse exposure to enter from the other end of the optical fiber.

Further, the irradiation port of the optical fiber in the holder is provided so as to face the side opposite to the first development processing tank.

In the device of the above structure, the holder is arranged on the upper end surface of the block above the processing liquid surface, and the crossover roll is arranged on the upper side of the holder. The crossover roll and block block the irradiation opening of the optical fiber embedded in the holder from above and below, so that the
It does not leak into the development processing tank. Light for reversal exposure is incident on the optical fiber from a light source provided at a position away from the second development processing tank, and the photosensitive material before being immersed in the second development processing tank is reversely exposed. As described above, since the light leakage from the irradiation port of the optical fiber does not occur, a beautiful image processing can be performed without adversely affecting the photosensitive material. In addition, reverse exposure of the photosensitive material before being immersed in the second developing treatment tank causes reverse exposure unevenness or insufficient reverse exposure due to reverse exposure of the photosensitive material in the processing liquid, that is, coloring of the processing liquid. Unevenness of all color light (for example, if the treatment liquid is reddish, the three color layers are not evenly exposed), the light is absorbed by the treatment liquid, or the light is emitted due to the contamination of the irradiation port of the optical fiber embedded in the holder. The passing unevenness disappears.

Further, by directing the irradiation port of the optical fiber to the opposite side to the first development processing tank, it is possible to reliably prevent light leakage to the first development processing tank.

[Embodiment of the Invention] FIG. 1 shows a developing device 10 to which the present invention is applied.

In the developing device 10, the rack 14 is inserted into the tank 12. The rack 14 is provided with a pair of side plates 16 (the side plate 16 on the front side is not shown), and a block 18 is hung between these side plates 16 to form a slit-like guide passage for the photosensitive material 20.
Forming 22. The photosensitive material 20 is nipped by the nip rolls 24 and 26, wound around the nip roll 26 over about 1/4 circumference and guided vertically downward, and passes through the guide rolls 28, 30, 32 and the folding roll 34. It is supposed to be folded back at. Further, the folded back photosensitive material 20 is guided by the guide rolls 36, 30, 28, and then sandwiched by the sandwiching rolls 42, 44 to be sent to the next step.

The photosensitive material 20 sent downward from the guide roll 28 is the tank 12
The second development is performed by being immersed in the developing solution 46 poured into the inside.

A block-shaped holder 48 is attached to the upper end of the block 18 below the nip roll 26.
One end of an optical fiber 50 is embedded in 48, and the end thereof is opened and corresponds to the photosensitive surface of the photosensitive material 20 which is hung down from the sandwiching roll 26. The optical fiber 50 has an outer periphery covered with a light shielding material, and the other end corresponds to a lamp 52 which is a light source as shown in FIG. A reflection cover 54 is attached to the other end of the optical fiber 50 so that the light of the lamp 52 can easily enter the optical fiber 50. Further, as shown in FIG. 1, an irradiation port 50A of an optical fiber 50, one end of which is embedded in a holder 48, is provided on the opposite side to the first development processing tank, and a nipping roll as a crossover roll is provided. twenty four,
A light-shielding effect due to the presence of 26 can be added to easily prevent light leakage to the first development processing tank side.

Since the lamp 52 can be installed at a place away from the developing device 10, it is not necessary to have a power source near the developing device 10, and this causes the lamp 52 to be electrically failed due to the developer 46. There is no such thing.

The holder 48 has an end portion of the optical fiber 50 arranged in a row along the width direction of the developing solution 46, so that the reverse exposure can be performed for a while over the width direction of the optical fiber 50.

Next, the operation of this embodiment will be described.

The photosensitive material 20, which has already undergone the first development in the previous step, is sent out by the sandwiching rolls 24 and 26 and immersed in the developing solution 46.
Before the photosensitive material 20 enters the developing solution 46, the light from the optical fiber 50 is received and reverse exposure is performed. The light-sensitive material 20 subjected to the reversal exposure immediately enters the developing solution 46, is subjected to the second development, is withdrawn, and is sent to the next step such as bleaching.

The optical fiber 50 can be easily treated if its length is about 300 mm or more, but the length is not particularly limited.

As described above, since the holder 48 only needs to be attached corresponding to the photosensitive material 20 which is immersed in the developing solution 46 of the developing device 10, the developing device 10 and the reversal exposure means can be integrally provided, It is not necessary to provide a large reversal exposure device.

In the above embodiment, the photosensitive material 20 in the state of being hung between the nip roll 26 and the developing solution 46 is subjected to the reversal exposure, but other portions may be used, and the optical fiber 50 is developed. Any material can be used as long as it corresponds to the photosensitive material 20 before being dipped in the liquid 46.

[Advantages of the Invention] Since the present invention has the above-described configuration, the light for reverse exposure emitted from the irradiation opening of the optical fiber embedded in the holder is first.
The image processing can be performed without leaking to the development processing tank of
Furthermore, uneven reverse exposure and insufficient reverse exposure are eliminated. Further, by directing the irradiation port of the optical fiber to the opposite side to the first development processing tank, it is possible to reliably prevent light leakage to the first development processing tank.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a photographic developing apparatus according to the present invention, and FIG. 2 is a partial sectional perspective view showing an optical fiber used in FIG. 10 …… Developer, 20 …… Photosensitive material, 46 …… Developer, 48 …… Holder, 50 …… Optical fiber, 52 …… Lamp.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Abe Akira 210 Nakanuma, Minamiashigara City, Kanagawa Prefecture, Fuji Photo Film Co., Ltd. (56) References JP 61-114237 (JP, A) JP 61-217045 ( JP, A) Actual development Sho 59-87052 (JP, U)

Claims (2)

[Scope of utility model registration request] 1. A photographic developing apparatus for performing image processing by performing reverse exposure on a photosensitive material before the first development processing is completed in a first development processing tank and before being dipped in a second development processing tank. It is arranged on the upper end surface above the processing liquid surface of the block which is hung on the side plate in the second development processing tank, and guides the light for reverse exposure of the photosensitive material before being immersed in the second development processing tank. A holder in which one end of a light-emitting optical fiber is embedded so that its irradiation port is exposed, and a conveyance path formed by the block in the second development processing tank for disposing the photosensitive material on the upper side of the holder. A crossover roll that sandwiches and conveys the light to the block and blocks light leakage from the irradiation port, and a light for reverse exposure from the other end of the optical fiber that is provided at a position apart from the second development processing tank. And a light source for True the developing device. 2. The utility model registration claim (1), characterized in that the irradiation port of the optical fiber in the holder is provided toward the opposite side to the first development processing tank.
The photographic developing device described in the item.