JPH026449Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a heat-insulating bag used as a developer tank of a photographic processing machine.

[Conventional technology]

Generally, the temperature of the developer in a photographic processing machine must be kept at 20 to 25°C in order to obtain suitable images.

Therefore, in the past, the developer had to be heated in advance before being supplied in the winter, which required a lot of effort, and the setup time was long, resulting in large loss times. There was a problem in that the life of the developer was shortened by heating the developer before supplying it to the eye, and there was also a large loss of developer each time the developer was put in and taken out.

In addition, developer circulation type heating machines are also sold separately, but these heating machines are expensive, require a large amount of liquid to enter the heating machine, which is uneconomical, and are inconvenient to handle. The disadvantage was that it required extra space.

[Purpose of invention]

This device was devised by focusing on the problems of the conventional technology, and its purpose is to be able to maintain the temperature of the liquid at an appropriate temperature at all times, making it ideal for use as a developer tank in photo processing machines. This provides a heat-retaining bag.

[Structure of the invention] In order to achieve the above object, the gist of this invention is that a planar heating element is embedded inside a rubber-like elastic body formed in a bag shape.

[Example of idea]

Embodiments of this invention will be described below based on the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a housing-like photographic developing machine main body, and the main body 1 is equipped with a saucer 2, a developer tank 3, a push lid 4, a link mechanism 6 including a handle 5, and a developing tray 7 in order from the bottom. be done.

The developer tank 3 is communicated with the developer tray 7 via a developer introduction tube 8, and when the push lid 4 is pushed down by operating a link mechanism 6 including a handle 5, the developer tank 3 is squeezed and the developer inside is released. is supplied to the developing plate 7 through the introduction tube 8.

In this embodiment, the developer tank 3 is
As shown in FIGS. 2A to 2C, it is formed into a bag shape using a rubber-like elastic body 9, and a planar heating element 10 is embedded inside the elastic body.

That is, the developer tank 3 has a conductive tape 11 and a conductive wire 11a disposed on both ends of the planar heating element 10, an electrode terminal 13 for attaching the power cord 12 to the end of the conductive wire, and an electrode terminal 13 for attaching the power cord 12. After installing the automatic temperature controller 14 in the middle of the bag 12, these are placed on the entire surface (in the case of FIG. 2B) or one side (in the case of FIG. (in the case of Figure C). still,
The temperature sensing portion 14a of the automatic temperature regulator 14 is exposed on the inner surface of the tank.

Therefore, the planar heating element 10 constantly senses the temperature of the liquid in the developer tank 3 using the automatic temperature controller 14 by being energized through the power cord 12 and the plug 12a. The heating of the developer tank 3 (rubber-like elastic body 9) is controlled by turning on and off the power so that the temperature reaches a predetermined temperature (20 to 25 DEG C.).

In the above embodiment, instead of the planar heating element 10, a printed wiring heating element, an arrangement of nichrome wires, or other heating elements may be selected and used depending on the situation. Further, depending on the amount of heat generated by the heating element, the automatic temperature controller 14 may not be used.

[Effect of idea]

In this invention, a planar heating element is embedded inside the rubber-like elastic body formed into a bag shape as described above to keep the temperature of the liquid inside at an appropriate temperature at all times, so the bag can be photographed. When applied to the developer tank of a machine, it provides the following excellent effects.

There is no need to preheat the developer, which saves time and effort, eliminates loss time for setup, prevents overheating of the developer, extends the life of the developer, and eliminates developer loss each time it is taken in and out.

Compared to circulation type warming machines, it requires less space, is cheaper, and is easier to handle.

It is economical as it does not require extra liquid volume compared to circulation type warming machines.

Compared to conventional developing machines, its functionality does not deteriorate even in cold and cold regions, and it has great added value.

In addition, the thermal bag of this invention has the advantage of being highly versatile, as it can be used to prevent freezing of drinking water, water for flushing toilets, etc., in brewing processes that involve fermentation, pasteurization of milk, etc., and for keeping various liquids warm.

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view of the entire photo developing machine showing an embodiment of this invention, Fig. 2A is an enlarged plan view of its main parts, Fig. 2B is a longitudinal sectional front view of the main parts, and Fig. 2B is a longitudinal sectional view of the main parts.
Figure C is a longitudinal sectional front view of a main part showing a modification. 3...Developer tank, 9...Rubber-like elastic body, 1
0... Planar heating element.

Claims (1)

[Scope of utility model registration request] A thermal bag characterized by having a sheet heating element embedded inside a rubber-like elastic body formed into a bag shape.