Radiation imagery chemistry: process – composition – or product th – Post imaging processing – Physical developing
Patent
1992-10-27
1994-09-27
Rutledge, D.
Radiation imagery chemistry: process, composition, or product th
Post imaging processing
Physical developing
430398, 430450, G03D 302
Patent
active
053511034
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to an automatic developing machine for silver halide photographic light-sensitive materials, and more specifically a compact automatic developing machine with improved operability which offers dramatically improved chemical stability and which makes it easy to lower the replenishing rate.
BACKGROUND OF THE INVENTION
Silver halide photographic light-sensitive materials (hereinafter also referred to as light-sensitive materials or photographic materials) are processed by developing, desilvering, washing, stabilizing and other processes after exposure. A black-and-white developer or a color developer, a bleacher, a bleach-fixer or a fixer, tap water or deionized water, and a stabilizer are used for development, desilvering, washing and stabilization, respectively.
These liquids capable of performing the respective processes are generically called processing solutions. Each processing solution is usually kept at a temperature of 30.degree. to 40.degree. C., in which the light-sensitive material is immersed and processed.
These processes are usually carried out by sequentially transporting the light-sensitive material through processing tanks containing the above processing solutions, using an automatic developing machine or another means.
The automatic developing machine mentioned herein generally means a developing machine having a developing portion, a desilvering portion, a washing or stabilizing portion, a drying portion and a means for sequentially and automatically transporting the photographic light-sensitive material to each processing tank.
In processing using such an automatic developing machine, it is common practice to replenish the processing solution in each processing tank to keep the activity thereof constant.
Specifically, processing is carried out while supplying a replenisher from a replenisher tank to the processing tank as appropriate and necessary.
In this case, it is the common practice to prepare the replenisher itself (to be stored in the replenisher tank) in a separate place and supply it to the replenisher tank where necessary; traditionally, the replenisher has been prepared manually as follows.
The silver halide photographic light-sensitive material processing agent (hereinafter also referred to as photographic processing agent) is commercially available in the form of powder or liquid. It is manually prepared as a solution in a given amount of water in the case of powder. In the case of liquid, it is diluted with water to a given volume and transferred to the replenisher tank before use, since it is available in a concentrated state.
Replenisher tanks may be set next to the automatic developing machine, requiring considerable space. Also, in recently-increasing mini-labs, replenisher tanks are housed in the automatic developing machine; in this case as well, sufficient space must be available for the replenisher tanks.
Any processing agent replenisher is divided into several parts to ensure constantly good performance in photographic processing. For example, the color bleach-fixer replenisher is divided into two parts: the part of the oxidant ferric salt of organic acid and the part of the reducing agent thiosulfate. In preparing the replenisher, said dense part of ferric salt of organic acid and said dense part of thiosulfate are mixed together and diluted with a given amount of water before use.
Said dense parts are placed in containers such as plastic containers, which containers are packed in outer packages such as corrugated cardboard boxes for 1 unit of commercial distribution.
The processing agent replenisher kit of said part agents is dissolved, diluted, mixed and then diluted to a given volume before use. Said processing agent replenisher has the following drawbacks. First, the part agents are separately put into respective containers; some kits of processing agent replenisher comprise several bottles of part agents so that 1 unit of commercial distribution thereof means a considerable number of containers, which re
REFERENCES:
patent: 4705379 (1987-11-01), Kobayashi et al.
patent: 4839273 (1989-06-01), Yamada et al.
patent: 5240822 (1993-08-01), Tanaka et al.
Ishikawa Masao
Koboshi Shigeharu
Komatsu Yoshimasa
Konica Corporation
Rutledge D.
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