JPH0227331A - Magazine for photographic film - Google Patents

Abstract

PURPOSE:To prevent undesirable influence to be caused by static electricity, and also, to surely execute read by a detecting device of a camera side by providing a non-conductive part for showing the information related to a performance, a kind, etc. of a photographic film as an electric conduction pattern, on the surface of a magazine which is formed by a conductive synthetic resin. CONSTITUTION:A magazine 10 for containing a film F in a light shielding state is formed by a conductive synthetic resin, therefore, even in case when the film F is rotated or run at high speed in the magazine 10, the generation of static electricity is suppressed, no undesirable influence is exerted on an image. Also, a non-conductive sheet 22 for showing the information related to a performance, a kind, etc. of the photographic film F as an electric conduction pattern is stuck to the surface of a drum part position 11 of the magazine 10 corresponding to an information reading part of a camera side. By utilizing the surface of the magazine 10 as a conductive part and sticking the sheet 22 being a non-conductive pattern to the upper face thereof, a CAS code 20 is formed, and it is read by a detecting device of the camera side.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a container for storing a photographic material in a light-shielded state and loading it into a camera (these containers are generally magazines, cartridges, cartridges, cassettes, etc.). There are various types of magazines, but unless otherwise specified in this specification, they will be collectively referred to as magazines.

More specifically, it relates to how to attach so-called DX needles when the magazine is made of synthetic resin.

[Prior Art] In recent years, cameras using 35-layer roll film have become more sophisticated due to various automation. On the other hand, various types of films are available in the market.
Information such as sensitivity, type, number of frames to be shot, and allowable exposure range is attached to the magazine as an electrical conduction pattern (CAS code), which is automatically detected by the camera to control the shooting conditions. ing.

Further, in addition to the above-mentioned CAS code, various types of information are attached to the magazine as electrical conduction patterns (so-called DX codes).

Currently, all 35mm roll films on the market are stored in metal magazines.
As described in Publication No. 3140, CAS codes and the like are formed by coating a non-conductive portion in a specific pattern on a conductive coating coated on the metal base portion of the magazine. The film commonly known as one-ten roll film is stored in a synthetic resin cartridge, but it does not come with a CAS code.This is because cameras that use one-ten roll film are not sophisticated or automated. This is due to the fact that the variety of films available is limited.

In addition, a small number of foreign-made roll films are sold, albeit in small quantities, with a 35-inch roll film that is housed in a synthetic resin barrel similar to the one-ten roll film cartridge, but the cameras that use this are limited. CAS code etc. are not attached.

[Problems to be Solved by the Invention] As mentioned above, conventional 35mm roll film is stored in a metal magazine.As a result, despite the advancement and automation of cameras, one-ten roll film is stored in a cartridge. Compared to the case of , it is less convenient to use, and many people still cannot attach it to their cameras.

Therefore, in the future, it is possible to move to cartridges or improved magazines that are easier to use.
In this case, from the viewpoint of shape, manufacturing cost, etc., it seems inevitable that synthetic resin materials will be used.

In this case, when the magazine is made of synthetic resin, synthetic resin is generally non-conductive, so unlike the case of conventional metal magazines that tolerate conductivity, it is difficult to use during high-speed continuous shooting or rewinding. , When the film is rotated or run at high speed in the magazine, static electricity may be generated, which may adversely affect the image. 1. How to attach the so-called CAS code to the surface of the synthetic resin magazine. becomes a problem.

The present invention was created in view of the above, and aims to simultaneously solve the problems of preventing the negative effects of static electricity and how to attach a so-called CAS code when a magazine is constructed of a synthetic resin material. Other objects and benefits of the present invention will become apparent from the following description.

[Means for Solving the Problems] The present invention achieves the above object by providing a magazine for photographic film made of two synthetic resin materials, in which the synthetic resin material is conductive and comes into contact with a detection section on the camera side. A non-conductive part is attached to the surface of the position to express information related to the performance, type, etc. of the photographic film as an electrically conductive pattern;
Furthermore, the electrically conductive pattern is formed by pasting a non-conductive sheet, or the electrically conductive pattern is formed by applying a non-conductive film.

[Function] Since the magazine for photographic film is made of conductive synthetic resin material, the generation of static electricity is suppressed even when the film is rotated or run at high speed within the magazine during high-speed continuous shooting or rewinding. , there is no negative effect on a single image such as the generation of static marks, and since a non-conductive part is attached to the surface of the magazine that represents information related to the performance, type, etc. of the photographic film as an electrically conductive pattern, it is completely different from the conventional method. Similarly to the so-called CAS code in the magazine, the code is reliably read by the camera-side detection device.

[Example] Next, an example of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an example of a magazine according to the present invention. In the figure, F denotes a film, which is housed in the magazine 10 in a light-shielded manner. 20 is CAS
The code 21 is the product barcode.

One of the features of the magazine according to the present invention is that generation of static electricity is prevented by forming the magazine from conductive synthetic resin.

The specific structure of the magazine is as follows:
The part that the film F contacts is molded with conductive synthetic resin,
The present invention also includes an embodiment in which members or portions that the film F does not come into direct contact with, such as a cap, are molded from a non-conductive synthetic resin.

The conductive synthetic resins used include those mixed with carbon black, metal powder, ionic impurities, etc.
Various types are available.

As is generally known, the degree of conductivity that the synthetic resin used must have is determined by the sufficient conductivity (resistance value) as a measure to prevent static electricity. It is not necessarily necessary to have the same degree of conductivity as the metal.

How the so-called CAS code 20 is attached is shown in FIG. In other words, reference numeral 11 is a part of the magazine IO, which is an enlarged view of the position corresponding to the information reading part on the camera side, and the surface of this position is electrically conductive with information related to the performance of one type of photographic film, etc. A non-conductive sheet 22 represented as a pattern (conductive pattern) is attached.

In the conventional method, an electrically conductive pattern is printed on the surface of a non-conductive sheet using conductive ink, etc. However, in the present invention, the surface of the magazine is used as a conductive part, and a non-conductive pattern is printed on the top surface of the magazine. The point is that a so-called CAS code 20 is formed by pasting a sheet 22 as a sex pattern.

Various methods can be used to attach the sheets, such as using an adhesive or heat welding, as long as they do not adversely affect the electrical characteristics of the pattern.

A second aspect of the present invention is to form a conductive pattern on the surface of a conductive magazine by applying a non-conductive film instead of the non-conductive sheet 22. By using the non-conductive ink 22, visual information can also be displayed on the surface of the conductive magazine.

In the above embodiment, the non-conductive ink or paint 22 is applied to the surface of the conductive synthetic resin magazine by various techniques such as printing, spraying, and painting.

The thickness is preferably 7 cm or more.

Various types of ink or coating material 22 can be used to form the conductive pattern 20, and there are no particular limitations on the application of the present invention.

In addition, in the drawings explaining the present invention, the conventional 3510
-Although a configuration similar to that of a LeFilm cartridge has been shown, it goes without saying that the present invention is also applicable to a double magazine system similar to a so-called cartridge for one-ten roll film.

[Effects of the Invention] According to the present invention, since the magazine for photographic film is made of conductive synthetic resin, it is possible to eliminate the negative effects on images due to static electricity, as with conventional metal magazines, and furthermore, Since a non-conductive part representing a so-called CAS code as an electrically conductive pattern is attached to the surface of the conductive magazine, it can be reliably read by a detection device on the camera side, as with conventional magazines.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a magazine showing an embodiment of the present invention, and FIG. 2 is an enlarged view of the main parts. In the figure, each symbol indicates the following. F: Film IO: Magazine 20: CAS code 21: Par code 22: Non-conductive part Patent applicant Konica Co., Ltd. Representative Patent attorney Nobuaki Sakaguchi F: Film 20: CAS code 21: Bar code 22: ;11:@+'93Jp

Claims (1)

[Claims] 1. In a photographic film magazine made of a synthetic resin material, the synthetic resin material is conductive, and the surface of the position where it contacts the detection part on the camera side is coated with the performance of the photographic film, A magazine for photographic film, characterized in that it is provided with a non-conductive part that represents information related to the product type, etc., as an electrically conductive pattern. 2. The photographic film magazine according to claim 1, wherein the conductive pattern is formed by pasting a conductive sheet. 3. The magazine for photographic film according to claim 1, wherein the conductive pattern is formed by applying a conductive film.