JPH05100362A - Package for photographic film - Google Patents

Abstract

PURPOSE:To provide a film unit obtained by firmly fixing a clip and a carrier sheet without making the end part of the aperture of the clip narrow. CONSTITUTION:Projections 10a are formed on both contact surfaces which execute caulking by adding uniform force from both outside surfaces of a main body part 10 interposing the first carrier sheet 6 from both surfaces and which are brought into contact with the sheet 6. Besides, the opening condition of the tips of bent pieces 11a, 11b is set to be mutually equal at both end parts in a width direction and equal to both ends or wider than them at the central part. Simultaneously, the part put between the central part and both end parts is set to be mutually equal and equal to both end parts or narrower than them. Since the projections 10a bite into both surfaces of the sheet 6, the clip 7 and the sheet 6 are firmly fixed. Besides, since the caulking is executed from both sides of the main body part 10 by the uniform force, a gap between the tips of the bent pieces 11a, 11b is not made narrow.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic film package in which a sheet-shaped photographic film is stored in a light-shielding envelope so that it can be freely taken in and out.

[0002]

2. Description of the Related Art Relatively large size (for example, 12.5
A film unit having a sheet-shaped photo film of (10 cm) and a carrier sheet detachably attached to the rear end of the photo film and having the other end fixed with a clip, and an insertion opening closed with the clip, A photographic film package composed of a light-shielding envelope for accommodating a photographic film in a light-tight manner is proposed in the specification of USP 4821054 and Japanese Patent Application No. 2-411154.

This photographic film package is used by loading it in a film holder mounted behind the camera.
When loading, operate the lock lever of the film holder to set it to the unlocked position. In this state,
Insert the photo film package into the film holder,
When the lock lever is set to the lock position, the clip is locked at the film holder with the open end thereof being pawled.
After that, when the light-shielding envelope is picked up and pulled out, the clip and the light-shielding envelope are disengaged, and the clip is exposed from the insertion port to enable photographing. Then, when the light-shielding envelope is pushed into the film holder after the photographing is completed, the insertion opening is closed by the clip, and the exposed photographic film is light-tightly stored in the light-shielding envelope. After storing, the lock lever is set to the unlocked position and the light-shielding envelope is pulled out again, and the photo film package is taken out from the film holder. . By the way, the photo film is also pulled when pulling out the light-shielding envelope,
In the photographic film package, the clip is crimped by applying force from one side to firmly fix the clip to the carrier sheet. The caulking shape formed on the clip 7 is one flat and the other is a projection 7a as shown in FIG. 5, or one is a projection 7a and the other is a depression 7b as shown in FIG.

[0004]

However, when the conventional photographic film package described above is crimped,
Since the opening end of the clip is deformed so as to be narrowed, the clip cannot be fixed to the film holder by the nail in some cases.
Further, if the caulking shape is as shown in FIG. 5 or FIG. 6, strong fixation cannot be secured, so when pulling out the light-shielding envelope, the carrier sheet comes off from the clip, and the photo film is also pulled out from the film holder. I was afraid that. An object of the present invention is to provide a photographic film package in which the clip and the carrier sheet are firmly fixed to each other without deforming the open end of the clip.

[0005]

In order to achieve the above object, according to the present invention, caulking is performed from both outer surface sides of a clip so that protrusions are formed on both contact surfaces of the clip which contact both surfaces of the carrier sheet. , These are fixed. Further, in the invention of claim 2, the opening degree of the clip tip is equal to each other at both ends, and the central portion is set to be equal to or wider than the both end portions, and the portions sandwiched between the central portion and both end portions are equal to each other. And, it is set to be equal to or narrower than both ends. Furthermore, in the third aspect of the invention, except for the central portion of the clip, it is crimped symmetrically.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 shows a photographic film package of the present invention. The photographic film package 2 is used by being loaded in a film holder of a camera (for example, see USP 4821054). The photographic film package 2 comprises a film unit 3 and a light-shielding envelope 4 for accommodating the film unit 3. A first carrier sheet 6 made of a black polyester film is joined to the lower surface of the left end portion of the photographic film 5 in the form of a sheet constituting the film unit 3 via hot melt. This first carrier sheet 6
A clip 7 is crimped on the opposite end of the. Further, when the photographic film 5 is joined, the first carrier sheet 6 is provided with holes 8 for distinguishing between the front and back sides so that the photographic film 5 can be surely joined not to the lower surface but to the upper surface.

Regarding the relationship between the thickness of the first carrier sheet 6 and the caulking strength, for example, the strength is 3 kg or less when the thickness is 50 μm, and the strength is 7 kg or more when the thickness is 188 μm, the stronger the caulking strength is obtained. .. By the way, when the thickness of the first carrier sheet 6 is large, the step difference with the photographic film 5 becomes large, and a problem occurs that the light-shielding envelope 4 is caught in and out. Therefore, in this embodiment, the thickness of the first carrier sheet 6 is set to 10
The thickness is 0 μm, but the thickness is 80 μm to 150 μm.
May be Further, if the first carrier sheet 6 is transparent, external light may enter the light-shielding envelope due to light piping. Therefore, the first carrier sheet 6 is black, but other colors may be used.

This clip is shown in FIG. 1 showing the clip.
Lip 7 has a black surface and is cold rolled with a thickness of 0.15 mm.
A body 10 and a pair of bent pieces 1 integrally formed of a steel plate
It consists of 1a and 11b and has a bell shape as a whole.
It The main body 10 has a U shape, and the first carrier
With the sheet 6 wrapped in a sandwich,
I cried from the surface. Therefore, the first carrier sheet 6
Protrusions 10a are formed on both contact surfaces of the main body 10 that contacts the
To be done. These protrusions 10 a are formed on the first carrier sheet 6.
One that is firmly fixed by cutting into both sides, for example, caulking strength
Can be 5.5 Kg. The protrusion 10a is
It is formed so as to avoid both ends and the center of the lip 7,
The number is 8 on one side and 16 in total. On one side
The eight projections 10a formed are symmetrical with respect to the center.
So, for example, D from the center₁(D ₁= 11.7 mm) away
From the open position, D₂(D₂= 8 mm) with a spacing of
As shown in FIG. In addition, of clip 7
The ends of the bent pieces 11a and 11b cannot be narrowed at the ends.
Sea urchin D₃Is set to 20 mm. In this example,
The thickness of the lip 7 was 0.15 mm, but the thickness was 0.
It may be in the range of 10 mm to 0.20 mm. Also black
Before applying the color coating, apply 20μm zinc plating on the front and back.
You may.

The light-shielding envelope 4 is fitted between the bent pieces 11a and 11b in the direction of the arrow shown in FIG. An opening 12 is formed at the left end portion of the light-shielding envelope 4, but the inside of the light-shielding envelope 4 is kept light-tight by being fitted into the bent pieces 11a and 11b. By the way, when the light-shielding envelope 4 is fitted into the clip 7, there is a problem that the opening 12 of the light-shielding envelope 4 swells in the central portion and cannot be smoothly performed. As shown in FIG. In this figure, the positions of both ends are A and B, the position of the center is C, the intermediate positions between the A position and the C position, and the B position and the C position are D and E, and the folding at each position A to E is performed. The operability when the light-shielding envelope 4 was fitted to the clips X to Z whose opening degree was adjusted at the tips of the bending pieces 11a and 11b was examined. An example of the experiment is shown in Table 1 below. The thickness of the first carrier sheet 6 is 100.
The thickness of the light-shielding envelope is the largest on both sides, and is 700 μm at the maximum.

[0010]

[Table 1]

From the results of the experiment, it was found that the dimensions at the positions A, B and C are particularly important, and the light-shielding envelope 4 cannot be fitted into the clip 7 when A = B = C <2.1 mm. Further, as can be seen from Table 1, it was found that the light-shielding envelope 4 cannot be fitted into the clip 7 even when A = B> C. The preferable dimension at each position A to E derived by the experiment is D = E ≦ A = B ≦ C.

On the lower surface of the right end portion of the photographic film 5,
The second carrier sheet 14 is joined via hot melt as shown in FIG. This second carrier sheet 1
4, the opposite end is cut into a trapezoidal shape, and slits 15 and 16 having different width sizes are formed at this end. Further, a rectangular step correction sheet 17 is joined to the upper surface of the second carrier sheet 14. The step difference correction sheet 17 is arranged between the photographic film 5 and the slit 15, and the slit side end is obliquely cut. Therefore, it is possible to easily slide the film unit 3 with the light-shielding envelope 4 after the photographing is finished. For the same reason, the end portion of the first carrier sheet 6 on the side of the photographic film is also cut obliquely.

The light-shielding envelope 4 includes a second carrier sheet 14
The tip has a trapezoidal shape corresponding to the tip shape. Since this tip portion projects from the film holder when the photographic film package 2 is loaded into the camera, a reinforcing cardboard 18 is attached to this portion. Further, a notch 19 is formed in the center of the cardboard 18 so that the film unit 3 can be reliably pulled out together with the light-shielding envelope 4 when the photographic film package 2 is taken out after the photographing is completed. Furthermore, a stopper tape 20 for controlling the position in the film holder is joined along the opening end of the light-shielding envelope 4. The light-shielding envelope 4 is made of carbon-mixed black paper in order to obtain a light-shielding property. The outer surface of the light-shielding envelope 4 is moisture-proofed and the inner surface is finished smoothly.

The operation of the photographic film package 2 thus constructed will be described. In the photographic film package 2, the opening end of the light-shielding envelope 4 is fitted into the clip 7 and the opening 12 is closed, as shown in FIG. The photographic film package 2 is loaded in the film holder.
At the time of this loading, the film holder is set to the unlocked state, and the clip 7 is inserted into the film holder with the clip 7 at the head. After this insertion, the clip 7 is set to the locked state and the clip 7 is locked to the film holder.

In this state, the tip of the light-shielding envelope 4 is attached to the cardboard 1
When the finger is lightly pinched from above 8 and pulled, the film unit 3 is also pulled to the right side in the drawing together with the light-shielding envelope 4. At this time, the locked clip 7 is attached to the first carrier sheet 6
Since the light-shielding envelope 4 is firmly fixed to, the opening end of the light-shielding envelope 4 and the bent pieces 11a and 11b are released from each other, and only the light-shielding envelope 4 moves to the position shown in FIG. It is exposed from the light-shielding envelope 4 and can be photographed.

After the photographing is finished, when the light-shielding envelope 4 is pinched with a finger and pushed in, the film unit 3 is housed in the light-shielding envelope 4 as shown in FIG. When the light-shielding envelope 4 is further pushed, the opening end of the light-shielding envelope 4 is fitted into the clip 7, the opening 12 is closed, and the inside of the light-shielding envelope 4 becomes light-tight. Even if the central portion of the light-shielding envelope 4 swells when it is pushed in, since the bent pieces 11a and 11b are widened in the central portion of the clip 7, the fitting can be performed smoothly. Further, since the upper and lower parts of the light-shielding envelope 4 are sandwiched at the positions D and E where the distance between the clips 7 is narrowed, outside light does not enter the inside through the opening 12.

Next, when the film holder is set in the unlocked state and the notch 19 is strongly pinched, the upper and lower portions of the light-shielding envelope 4 come into contact with each other through the opening 16. When the light-shielding envelope 4 is pulled out in this state, the film unit 3 together with the light-shielding envelope 4 is taken out from the film holder.

While handling the photographic film package 2,
The film unit 3 moves in the light-shielding envelope 4, and the clip 7
May come off the light-shielding envelope 4. In this case, the light-shielding envelope 4 may be bent at the end of the thick paper 18 and fixed with tape. Since the slot 15 is formed corresponding to the bent portion, the second carrier sheet 14 can be easily bent.

[0019]

As described above in detail, in the photographic film package of the present invention, since the protrusions are formed on both contact surfaces of the clip which contacts the carrier sheet, the clip can be deformed without deformation. The clip and the carrier sheet can be firmly fixed. Furthermore, the degree of opening of the clip tip is set to be equal to each other at both ends, and is set to be equal to or wider than the both ends at the central portion, and the portions sandwiched between the central portion and the both end portions are equal to each other and to both end portions. Since the setting is made equal or narrower, it is possible to smoothly fit the light-shielding envelope into the clip and ensure the light-shielding.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view showing a crimped shape of a clip.

FIG. 2 is an explanatory diagram showing a degree of opening of the clip as seen from the direction of the arrow shown in FIG.

FIG. 3 is a perspective view of the photographic film package showing a state in which the photographic film is exposed.

FIG. 4 is a plan view of the photographic film package showing a stored state.

FIG. 5 is an enlarged sectional view showing a crimped shape of a conventional clip.

6 is an enlarged cross-sectional view showing a conventional clip different from the crimped shape shown in FIG.

[Explanation of symbols]

 2 Photo film package 3 Film unit 4 Light-shielding envelope 5 Photo film 7 Clip 10 Main body 10a Protrusions 11a, 11b Bending piece 12 Opening

Claims (3)

[Claims] 1. A film unit comprising a sheet-shaped photographic film, a carrier sheet attached to the photographic film, and clips fixed so as to sandwich the carrier sheet from both sides, and a film unit fitted to the clip. In a photographic film package comprising a light-shielding envelope for accommodating a photographic film in a light-tight manner, the clip and the carrier sheet are fixed by projecting on both contact surfaces of the clip in contact with the carrier sheet. A photographic film package characterized by being formed by crimping. 2. The opening degree of the tip of the clip is such that both ends are equal to each other, and the central portion is equal to or wider than the both end portions, and the portions sandwiched by the central portion and both end portions are equal to each other, and The photographic film package according to claim 1, wherein the width is set to be equal to or narrower than that of both ends. 3. The photographic film package according to claim 1, wherein the clip is provided with protrusions formed by caulking symmetrically except the central portion.