JPH0375640A - Cartridge of roll film for photography - Google Patents

Abstract

PURPOSE:To allow light shielding when a film alone is housed into the cartridge without using backing paper by applying a light shieldable coating compd. on a part or the entire surface of the film. CONSTITUTION:A film inlet 17 is the part formed to a slit shape by the turn back part of a film winding chamber 12 and the front surface of a bridge 14. The light shielding structural body 18 is applied on both surfaces or the front or rear surface near the terminal of the film 16. External light is, therefore, shut off by the light shielding structural body 18 even if the light is made incident into the film winding chamber from the slit of the film outlet/inlet 17. The photographed film 16a wound on a winding spool shaft 13 is consequently prevented from being exposed by the external light. The light shielding of the film before or after the photographing is easily maintained in this way even if the film along is housed into the cartridge without utilizing the backing paper.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a cartridge containing a photographic roll film. More specifically, the present invention relates to a light shielding structure in a cartridge for storing a photographic roll film in a so-called double cartridge type in which a film storage chamber and a film winding chamber are integrally connected by a bridge, and a means for notifying image frame information.

[Prior art] A light-shielding container for storing roll film for still photography is
There is a so-called single cartridge type in which the film is ejected from a light-shielding container during shooting and then rewound into the light-shielding container after shooting, and a so-called double cartridge type in which the film storage chamber and film winding chamber are integrally connected by a bridge. The former is used in most commercially available 35+SM roll films, and the latter is used to store film for small cameras called 110 film.

It is clear that the double cartridge type is superior in terms of ease of setting it on the camera, but it is related to the mechanism on the still camera side.

For 35 mm roll film, a single cassette type film called a cassette is used exclusively. In recent years, still cameras incorporating an automatic feeding mechanism have become popular in order to facilitate film loading.

Eastman Kodak's Instamatic system and Agfa-Gewald's Rapid System are designed to make it easier to load 35m roll film into a camera and eliminate the need to rewind already shot film. The former has almost the same structure as the so-called 110 film cartridge currently on the market, but the latter uses two cartridges of the same shape that are not connected by a bridge, and the camera's take-up spool. Insert the home cassette instead, store the film you have shot in the home cassette one by one, and when all shooting is completed, take out the home cassette from the camera and use the empty cassette that held the film as the home cassette. It is something to be used.

In conventional cartridges and cartridges, in order to prevent the film inside the light-shielding container from being exposed to light, a telescope or the like is placed at the entrance and exit of the film to shield it from light.

In addition, in commercially available double cartridges for 110 film, a light-shielding paper called a backing paper is placed on the back of the film, and a small window is provided in the bridge area so that the information shown on the backing paper is placed on the back side of the film. The structure is such that you can visually see the number of the photographed frame.

[Problem to be solved by the invention] As mentioned above, the 35-roll film is stored in a light-shielding container called a cartridge, and a small amount of the film is pulled out from the film opening of the container as a leader section. To set the cartridge in the camera, first drop the cartridge into the storage compartment, then engage the tip of the leader with the take-up spool, close the camera back, and then operate the wind-up lever to take so-called color shots several times. You can take pictures after you go.

Some recent models are commercially available in which all you have to do is set the cartridge and place the leader section in the designated position, and then the mechanism on the camera side engages with the perforations in the leader section and automatically feeds the film. has been done.

Even with a 35mm still camera that has an automatic feeding mechanism like the one mentioned above, setting up the cartridge and placing the reader in the designated position is complicated, and many people are unable to set it up themselves. This is understandable because small cameras that use so-called 110 film stored in a double cassette cartridge are popular among beginners.

It is obvious that an integrated film cartridge in which the film storage chamber and film winding chamber are connected by a bridge is superior in terms of ease of use, and cooperation between camera manufacturers and processing services is needed. Although there are some problems, it is thought that in the future, 35a+m roll film will also be supplied in such easy-to-use cartridges.

In view of the above, the present invention was completed as a result of a series of studies regarding cartridge storage for 35 mm roll film.In particular, the present invention aims to improve photographic images and provide film at a lower cost. , does not use backing paper like traditional 110 film cartridges,
The main purpose of the present invention is to clarify an example of a cartridge that solves the problem of light shielding when a film is housed in a cartridge alone, as well as a means for visually informing photographed frame information, and other aspects of the present invention. The objects and benefits will become apparent from the following description and the accompanying drawings.

[Means for Solving the Problems] A feature of the present invention that is distantly related to the above object is a photographic roll film cartridge, in which: (1) the film storage chamber and the film winding chamber are integrally connected via a bridge; The film is stored singly across both chambers, and a light-shielding paint is applied to part or the entire surface of the film so that the film in both chambers is exposed to light entering from the film entrance/exit portion of the cartridge. ■ Applying a strip of light-shielding paint to the back side of the film,
Image frame information is displayed on the top surface of the cartridge, and a small window is provided in the bridge portion of the cartridge so that the number of shots taken can be visually checked through the small window.In the latter case, the image frame information is This includes an aspect in which the image capturing area is placed within the image capturing area and an aspect in which the image capturing area is placed outside the image capturing area.

[Example] Embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a cartridge according to the present invention. The present invention is intended to accommodate a 35m+o roll film, or can be applied as a cartridge that stores roll films of other sizes, and the size of the film described below is 35u.
This is only an example applied to +m roll film.

In the figure, numeral 10 is a film storage chamber in which unshot films are stored. 11 is the original spool shaft. Reference numeral 12 denotes a film winding chamber, in which the photographed film is wound onto a winding spool shaft 13.

In the above configuration, spool shafts are provided in both film chambers 10 and 12, but the present invention has an embodiment in which a spool shaft is not provided in both film chambers, and a spool shaft 11 or 13 is provided in only one film chamber. Including the embodiment in which the spool shafts 11 and 13 are arranged in both film chambers, one spool shaft 11 or 1
There are types in which only the spool shafts 11 and 13 can be rotated from the outside (unidirectional drive), and types in which both spool shafts 11 and 13 can be rotated together (bidirectional drive).

A bridge 14 connects the film storage chamber 10 and the film winding chamber 12. The present invention provides an embodiment in which the film storage chamber 10, bridge 14, and film winding chamber 12 are integrally molded from plastic or the like;
This includes an embodiment in which two or three or more members are assembled so as to be separable (disassembled).

Reference numeral 15 is a small window through which photographed frame information (number of photographed frames) displayed on the back side of the stored film 16 can be visually checked. In conventional cartridges, for example, for 110 film, the photographic frame number is displayed on a backing paper placed on the back of the film, and is configured to be visible through a small window in the bridge, but in the cartridge of the present invention, , since no backing paper is used, this visual inspection structure of image frame numbers cannot be adopted.

FIG. 2 is a cross-sectional view of the film 16 wound up to its end, and relates to a method of shielding the film entrance 17 from light. The film inlet 17 is connected to the film winding chamber 12
This is a slit-shaped portion formed by the folded portion of the holder and the front surface of the bridge 14, and in conventional cartridges and cartridges, it is shielded from light by placing a telescope or the like or by a maze structure.

A light-shielding structure 18 is applied to both surfaces (FIG. 4(a)), the front surface (FIG. 4(b)), or the back surface (FIG. 4(C)) of the film 16 near the terminal end.

Therefore, even if external light enters the film winding chamber through the slit in the film entrance/exit 17, the light is blocked by the light shielding structure 18, so that the exposed film 16a wound around the winding spool shaft 13 is exposed to the external light. Not exposed to light.

Figure 3 is a diagram showing the state of the film before use, with a light-shielding structure 1 on both sides near the leading edge of the film, or on the front or back side.
8 is applied. In this case as well, the unexposed film 16b is not exposed to external light entering from the film entrance/exit 19, as in the explanation according to FIG. 2 above.

In the embodiment described above, the light-shielding structure [8] is arranged both near the leading end and near the trailing end of the film 16, and the exposed film is moved into the film winding chamber 12 and is shielded from light. Applies to methods that

On the other hand, in the case of a method in which the photographed film is rewound into the film storage chamber 10 upon completion of photographing, the light shielding structure 18 may be disposed only near the leading end of the film 16.

In this embodiment, the light-shielding structure 18 is applied near the leading edge and/or the trailing edge of the film, but the same effect can be obtained even on the entire back surface of the film. If a light-shielding structure is applied to the entire back surface of the film, even if the film is removed from the camera during shooting, the film that has been shot or unexposed in the film winding chamber 12 and film storage chamber 1O will be protected from outside light by the light-shielding structure. Therefore, it is possible to replace the film with another type, for example, a film with a different TSO sensitivity, without any special operations such as rewinding the entire film when the number of frames is not reached.

As the light-shielding paint for forming the light-shielding structure 18,
Various materials can be used. For example, materials that are not included in the general concept of paint, such as opaque synthetic resin materials that have an affinity with the film 16, and film-forming materials that can be formed to a certain thickness by coating or dipping. can also be used.

Note that in order to make it possible to adopt a developing method in which the light-shielding structure 18 is immersed together with the film 16 in the processing solution of the developing device, the resin material for forming the light-shielding structure 18 must be immersed in the processing solution. It is necessary to check the internal and physical properties of the materials used to ensure that they do not dissolve into the water and adversely affect processing performance.

FIG. 5 shows one aspect of a method for displaying photographed frame information (number of photographed frames). A band-shaped display section 20 is formed on the back side of the film 16 using light-shielding paint, and photographed frame information is displayed on the surface of the band-shaped display section 20 so that it can be visually checked through a small window 15 provided in the bridge 14 of the cartridge, as shown in FIG. It has become. If the band-shaped display section 20 and the surface around the small window 15 are not in close contact with each other, there is a risk of light entering through the small window 15. Configure so that they are in close contact. Alternatively, the film 16 may be curved in its longitudinal direction or width direction to the extent that the flatness of the film is not adversely affected, so that the film 16 is brought into close contact with the front surface of the small window 15. Curving in the longitudinal direction can be achieved, for example, by curving the front surface of the bridge 14 and applying tension to the film 16, and curving in the width direction can be achieved by using a curved guide frame.

The image frame information band-shaped display section 2o shown in FIG. 5 is formed on the back side of the image portion where the photograph is taken, and therefore needs to be removed before, at the same time, or after the development process. Therefore,
The substance forming the band-shaped display portion 20 must be easily dissolved or softened by a specific solvent, and must not be eluted into the processing solution, or even if it is eluted, it will not adversely affect the processing performance. It is required that it be a thing.

In the above explanation, numbers are displayed so that the photographed frame information can be visually checked, but instead of the numbers, a coated pattern is displayed and read photoelectrically.
- If the band-shaped display section 20 is placed outside the image frame indicated by the dotted chain line, it is not related to the photographing screen, so there is no need to remove it.

M4Z, which is formed with a light-shielding paint so as to fill the perforations of the film 16, as shown by reference numeral 22.
Therefore, the band-shaped display section may be closed and the image frame information may be displayed. In this manner, even if the film at the perforation portion is destroyed by the film feeding operation, there will be no problem if the display is displayed in front of the location of destruction.

[Effects of the Invention] According to the present invention, without using a backing paper as in the past,
Even when the film itself is stored in a cartridge, it is easy to keep the film shielded from light before and after shooting, and the information on each shot can be displayed in a readable structure, making it easy to achieve the intended purpose. It is possible.

[Brief explanation of drawings]

Figure 1 is a perspective view showing one example of a cartridge, Figures 2 and 3 are cross-sectional views, Figure 4 is an enlarged sectional view of the film, and Figures 5 and 7 are the back side of a portion of the film. 6 are longitudinal sectional views of the bridge portion. In the figure, each symbol indicates the following. 10: Film storage chamber 11 Nisbourg shaft 12: Film winding chamber 13 Nispool shaft 14 Nibridge 15: Small window 16, film 17: Film entrance 18: Light shielding structure 19: Film exit 20. 22: Strip-shaped display section 21: Regulation plate

Claims (1)

[Claims] 1. The film storage chamber and the film winding chamber are integrally connected via a bridge, and the film can be stored singly across both chambers, and the film can be stored in part or all over the film. A photographic roll film cartridge characterized in that a light-shielding paint is applied to prevent the film in both chambers from being exposed to light entering from the film entrance/exit portion of the cartridge. 2. A strip of light-shielding paint is applied to the back of the film, and the image frame information is displayed on the top surface, while a small window is provided in the bridge of the cartridge so that the number of shots taken can be visually checked through the small window. Claim 1 characterized in that
The photographic roll film cartridge described in . 3. The photographic roll film cartridge according to claim 2, wherein the image frame information is arranged within an image shooting area. 4. The photographic roll film cartridge according to claim 2, wherein the image frame information is located outside the image shooting area.