JPH05216173A - Photographic film package - Google Patents

Abstract

PURPOSE:To provide a low-cost photographic film package such that external light entering from open end portions are surely blocked so that a used photographic film enclosed therein is not exposed. CONSTITUTION:Protruding streaks 14, 15 are formed by embossing at both ends of an opening 16 formed through a shielding envelope 4. Because the ends of the shielding envelope 4 where the protruding streaks 14, 15 are formed are increased in thickness, they are strongly held by shielding clips 5. The open end portions of the shielding envelope 4 are therefore held more strongly so that external light is prevented from entering the shielding envelope 4.

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 photo film package in which a sheet-shaped photo film of 10 cm) is stored in a light-shielding envelope is Japanese Patent Application No. 2-41115.
Proposed in No. 4. In this type of photographic film package, the light-shielding envelope is made of carbon-mixed black paper, and the opening for inserting and removing the photographic film is usually closed by a light-shielding clip so that outside light enters inside. There is no such thing.

This photographic film package is inserted into the film holder mounted on the back of the camera from the side of the light-shielding clip. Then, when the film holder is locked, the light blocking clip is locked to the film holder. After that, when the light-shielding envelope is pulled out, the light-shielding clip is detached from the light-shielding envelope, and the photographic film is exposed through the opening, so that the photograph can be taken. When the light-shielding envelope is pushed into the film holder after shooting, the photographed photo film is stored in the light-shielding envelope.
Further, the tip of the light-shielding envelope is fitted into the light-shielding clip. In this state, when the lock of the film holder is released and the light-shielding envelope is pulled out again, the photo film package containing the photographed photo film is taken out from the film holder.

[0004]

By the way, when the light-shielding envelope is pushed into the film holder after the photographing is completed, the light-shielding envelope is inserted with a slight gap between the tip and the light-shielding clip, or the light-shielding envelope is inserted. When the envelope is laterally displaced and the opening end of the envelope protrudes outside the contour of the light-shielding clip, the external light entering the light-shielding envelope from the opening end causes a problem of exposing the photographed photographic film.

The present invention has been made in view of the above circumstances, and provides a photographic film package which surely shields external light entering from the opening end portion without cost and prevents the photographed photographic film from being exposed. The purpose is to

[0006]

In order to achieve the above object, in the invention according to claim 1, a convex portion for blocking outside light entering the light-shielding envelope is formed in the vicinity of the opening formed in the light-shielding envelope. It is a thing. This convex portion is preferably a plurality of concave and convex portions. Further, in the invention according to claim 2, when the light-shielding envelope is fitted into the light-shielding clip, the convex portion is pinched by the light-shielding clip and brought into close contact with the light-shielding clip.
Further, in the invention according to claim 3, a pair of open ends formed on both sides of the open part of the light blocking clip are embossed or pressed to block light entering the light blocking envelope from the open ends. Is. Hereinafter, the present invention will be described in more detail with reference to the drawings.

[0007]

EXAMPLE FIG. 2 shows a photographic film package in which a photographic film unit is pulled out from a light-shielding envelope.
This photographic film package 2 is composed of a photographic film unit 3 and a light-shielding envelope 4 that accommodates it in a light-tight manner. A light-blocking clip 5 is provided at the rear end of the photo film unit 3, and the light-blocking clip 5 is shown in FIG.
As shown in FIG. 5, the light-shielding envelope 4 is engaged with the rear end thereof to shield the inside of the photographic film package 2. An adhesive tape 6 is removably attached to the tip of the light-shielding envelope 4, and the adhesive tape 6 is attached to the light-shielding envelope 4 and the light-shielding clip 5 after the photographing is finished. It is used to prevent it from coming off. The adhesive tape 6 is made to project in a part of a notch 7 formed at the tip of the light-shielding envelope 4 so that it can be easily peeled off.

When such a light-shielding envelope 4 is produced by bending a single sheet, the elastic force of the bent portion causes the central portion of the light-shielding envelope 4 to expand, making it difficult to fit into the light-shielding clip 5. .. In order to prevent this bulging, as shown in FIG. 4, the main body of the light-shielding envelope 4 has the same shape as the upper sheet 10,
The lower sheet 11 and the belt-shaped connecting sheets 12 and 13 to which an adhesive is applied are connected. Each sheet 1
For 0 to 13, black paper mixed with carbon is used in order to obtain a sufficient light-shielding property. The upper sheet 10,
The rear end of the lower sheet 11 serves as the edge of the opening 16 (see FIG. 2) through which the photographic film unit 3 is taken in and out. On the rear end portions of the upper sheet 10 and the lower sheet 11, convex strips 14a, 15a, 14b, 15b are formed by embossing, for example, as a kind of convex portion. These ridges 1
4a, 15a, 14b and 15b are the upper sheet 1
0, extending from both ends of the lower sheet 11 toward the center. The convex portion is preferably formed as a plurality of concave and convex stripes, and in particular, a convex stripe formed to have a curved surface as shown in FIG. 5 is preferable.

A depression 17 is formed on the surface of the lower sheet 11.
A pair of dust removing sheets 18 having the above are adhered. The dust removing sheet 18 removes dust and dirt adhering to the back surface of the photographic film unit 3. The dust removing sheet 18 is cut into a rectangular shape and is arranged such that its short side is parallel to the connecting sheet 12.

The tips of the upper sheet 10 and the lower sheet 11 are cut into a trapezoidal shape, and their edges are connected by an adhesive 20 applied to the lower sheet 11. A stopper tape 21 is attached to the rear end portion of the light-shielding envelope 4 so as to be orthogonal to the connecting sheets 12 and 13, and the stopper tape 21 regulates the position in the film holder when the light-shielding envelope 4 is pulled out. To do. Further, the tip of the light-shielding envelope 4 is a portion protruding from the film holder, and when the light-shielding envelope 4 is pulled out or the photographic film package 2 is put in or taken out, it is grasped by a finger or the like, so that a reinforcing cardboard 22 is attached. ..
A notch 23 is formed in the center of the cardboard 22 so that the upper sheet 10 can be directly gripped by a finger. Shading envelope 4
After the above, the embossing process described above is performed, and as shown in FIG.

The light-shielding clip 5 is caulked and fixed to the rear end of the first carrier sheet 25 as shown in FIG. The front end of the first carrier sheet 25 is releasably joined to the rear end of the photographic film 26 via hot melt. A hole 27 for determining the front and back of the photographic film unit 3 is formed at the end of the first carrier sheet 25. The rear end of the second carrier sheet 28 is releasably joined to the front end of the photographic film 26 via hot melt. The second carrier sheet 28 has a tip portion cut into a trapezoidal shape in order to easily insert and remove the photographic film unit 3 into and from the light-shielding envelope 4.
On the upper surface of the second carrier sheet 28, a step correction sheet 29 for correcting the step with the photographic film 26 is attached.

The trapezoidal portion of the second carrier sheet 28 includes
An elliptical elongated hole 30 is formed from the tip end side, and three openings 31a to 31c are formed along the longitudinal direction of the elongated hole 30, respectively. The elongated hole 30 is for directly contacting the upper sheet 10 and the lower sheet 11 when the light-shielding envelope 4 is picked up. Thereby, when the photographic film package 2 is pulled out from the film holder, the relative movement of the photographic film unit 3 and the light-shielding envelope 4 can be prevented. In addition, the three openings 31a to 31
c are arranged at different intervals so that the front and back of the photo film unit 3 can be detected under a safelight. Therefore, it is possible to prevent the front and back of the photographic film unit 3 from being inserted into the light-shielding envelope 4 at the factory. The front and back sides can be detected by using the hole 27.

The operation of the photographic film package thus constructed will be described. This photographic film package 2 is loaded into the film holder (see, for example, US Pat. No. 4,821,054) from the side of the light-shielding clip 5. When loading, the film holder is set to the unlocked state. After the insertion, it is set in the locked state and the light-shielding clip 5 is locked to the film holder.

After locking, when the thick paper 22 is picked up and the light-shielding envelope 4 is pulled out to the position shown in FIG. 2, the photographic film 26 is exposed, and photography is possible. When the light-shielding envelope 4 is pushed into the film holder after shooting, the dust removing sheet 18 slides on the back surface of the photographic film 26. As a result, dust and dirt attached to the back surface of the photographic film 26 during shooting are removed by the dust removing sheet 18. After this, the lower sheet 11
Slides on the back side of the photo film 26, but the photo film 26 is not scratched by dust or dirt.

When the rear end of the light shielding envelope 4 is inserted into the light shielding clip 5, the upper sheet 10 and the lower sheet 11 are pressed against the first carrier sheet 25 by the light shielding clip 5, respectively. When the light-shielding envelope 4 is further inserted into the light-shielding clip 5, as shown in FIG. 5, the ends of the light-shielding envelope 4 thickened by the height of the ridges 15a and 15b are pinched by the light-shielding clip 5 so that they are closely attached. become. At this time, the light-shielding clip 5
The clamping force of the sheet becomes stronger, and the upper sheet 10 and the lower sheet 11
Is strongly adhered to the first carrier sheet 25. For this reason, even if the light-shielding envelope 4 is laterally displaced and the end portion thereof protrudes out of the contour of the light-shielding clip 5, a slight gap is formed between the rear end of the light-shielding envelope 4 and the light-shielding clip 5. However, external light does not enter the inside of the light-shielding envelope 4, and the inside is kept light-tight.

Next, when the film holder is set in the unlocked state and the notch 23 is strongly pinched, the upper sheet 10 and the lower sheet 11 directly contact each other through the elongated hole 30. When the light-blocking envelope 4 is pulled out in this state, the photographic film unit 3 does not shift in position within the light-blocking envelope 4, so that the rear end of the light-blocking envelope 4 is pulled out from the film holder while being inserted deeply into the light-blocking clip 5. In this state, by fixing the light-shielding envelope 4 and the light-shielding clip 5 with the adhesive tape 6, it is possible to prevent the light-shielding clip 5 from coming off from the light-shielding envelope 4 during the subsequent handling of the photographic film package 2.

In the embodiment described above, a pair of ridges 1 parallel to the longitudinal direction of the light-shielding clip 5 are provided at the end of the light-shielding envelope 4.
4 and 15 are formed, the ridges 40a and 40b that are inclined with respect to the light-shielding clip 5 as shown in FIG. 6 or one protrusion formed over the entire width of the light-shielding envelope 4 as shown in FIG. Similar effects can be obtained by forming the strip 41 or a large number of convex strips 43 perpendicular to the light-shielding clip 5 as shown in FIG. 8 on the light-shielding envelope 4. In addition, any of the above-mentioned ridges (1 of the ridge)
(Seed) is also formed in the region of the light-shielding envelope 4 which is held by the light-shielding clip 5, but when the light-shielding envelope 4 is fitted into the light-shielding clip 5, it is at a position close to the tip of the light-shielding clip 5.
The same effect can be obtained even if the region is not necessarily pressed by the light blocking clip 5. Furthermore, in the above embodiment, the step correction sheet 29 is attached to the second carrier sheet 28. However, if the second carrier sheet 45 integrally formed as shown in FIG. 9 is used, the step correction sheet 29 can be omitted. Therefore, the manufacturing cost of the photographic film package can be reduced.

FIG. 10 shows an embodiment of a photographic film package in which both ends of the light shielding clip are embossed as described above. In this embodiment, a pair of ridges 51 are formed on both ends of the light-shielding clip 50 so as to open outward, and
Both corners of the rear end portion of the light shielding envelope 52 are obliquely cut.
In the embodiment thus configured, when the light-shielding envelope 52 is inserted into the light-shielding clip 50, the pair of ridges 51 regulate the insertion direction of the light-shielding envelope 52 and prevent lateral displacement. Further, when the light-shielding envelope 52 is fitted into the light-shielding clip 50, the pair of ridges 51 block outside light entering the inside of the light-shielding envelope 52 from both ends of the light-shielding clip 50. FIG. 11 shows an embodiment in which both corners of the light shielding clip are crushed. In this embodiment, both corners of the light-shielding clip 55 are crushed by pressing to form the close contact portions 56 and 57 (hatched portions in the figure), and the light-shielding envelope 52 is provided from both ends of the light-shielding clip 55 by the close contact portions 56 and 57. It is designed to block the outside light that enters the inside of.

[0019]

As described above in detail, in the invention of claim 1, since the convex portion is formed in the vicinity of the opening formed in the light-shielding envelope, the convex portion is inserted from the end portion of the opening closed by the light-shielding clip. It is possible to provide an inexpensive photographic film package that blocks external light. Further, in the invention according to claim 2, since the convex portion is formed at the position of the light-shielding envelope sandwiched by the clips, the light-shielding can be made more reliable. Furthermore, the invention according to claim 3 provides an inexpensive photographic film package which shields the light by forming a convex portion by embossing or a close contact portion by pressing on both ends of the light shielding clip.

[Brief description of drawings]

FIG. 1 is an enlarged plan view showing a main part of a light-shielding envelope.

FIG. 2 is a perspective view of the photographic film package showing a state where the photographic film is exposed.

FIG. 3 is a plan view of the photographic film package showing a stored state.

FIG. 4 is an exploded perspective view of a light-shielding envelope.

5 is a cross-sectional view of the photographic film package shown in FIG.

FIG. 6 is a plan view of a photographic film package in which a pair of ridges are tilted with respect to a light-shielding clip to form a light-shielding envelope.

FIG. 7 is a plan view showing a photographic film package in which one ridge is formed over the entire width of the light-shielding envelope.

FIG. 8 is a plan view showing a photographic film package in which a large number of ridges are formed along the opening edge.

FIG. 9 is a view showing a modified example of the second carrier sheet.

FIG. 10 is a plan view showing a photographic film package in which a light-shielding clip is embossed.

FIG. 11 is a plan view showing a photographic film package in which both corners of a light shielding clip are crushed.

[Explanation of symbols]

2 Photo film package 3 Photo film unit 4 Light-shielding envelope 5, 50, 55 Light-shielding clip 10 Upper sheet 11 Lower sheet 14, 14a, 14b, 15, 15a, 15b, 40
a, 40b, 41, 43, 51 convex stripes (projections) 16 opening 25 first carrier sheet 26 photo film 28 second carrier sheet 56, 57 contact portion

Claims (3)

[Claims] 1. A film unit comprising a sheet-shaped photographic film, a carrier sheet attached to the photographic film, and a light-shielding clip fixed so as to sandwich the carrier sheet from both sides, and a film unit fitted into the light-shielding clip. In a photographic film package including a light-shielding envelope that light-tightly accommodates a photographic film, the light-shielding envelope has a convex portion in the vicinity of the opening that blocks light entering the light-shielding envelope from the opening. A photo film package characterized by being provided. 2. The photographic film package according to claim 1, wherein the convex portion is pinched by the light-shielding clip when the light-shielding envelope is fitted into the light-shielding clip. 3. A film unit having a sheet-shaped photographic film, a carrier sheet attached to the photographic film, and a light-shielding clip fixed so as to sandwich the carrier sheet from both sides, and a longitudinal direction of the light-shielding clip. A photographic film package comprising a light-shielding envelope for light-tightly accommodating a photographic film, the photographic film package having an opening fitted in an opening formed along the light-shielding clip, wherein both ends of the light-shielding clip are embossed. A photographic film package characterized in that a convex portion or a close contact portion formed by pressing is formed.