JPH0142096Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to the packaging of photographic materials such as photographic paper and photographic film wound into rolls.
More specifically, the present invention relates to a package of the above-mentioned band-shaped photosensitive material for indoor light loading.

[Prior art]

Japanese Utility Model Application Publication No. 55-113543 discloses a package of the above-mentioned strip-shaped photosensitive material, in which the strip-shaped photosensitive material wound into a roll is protected from light and moisture and can be easily loaded into an apparatus in room light. The following packages for photosensitive strips have been proposed: That is, it includes a roll of photosensitive strip wound into a roll of increasing radius and having a generally flat end face, and a cover for each end of said roll, each end cover extending around the circumference of said roll. In the packaging of photosensitive materials, such as those having a generally axially extending slit in the roll, the rim has a rim fixed thereto, the rim terminating in such a way that the slit does not reach the end face of the roll. The packaging is characterized by:

Although the above-mentioned invention has a sufficient function in terms of protecting the strip-shaped photosensitive material wound into a roll from light and moisture, it has disadvantages in terms of suitability for use. That is, when the package of the photosensitive strip according to the above-mentioned invention is loaded into a magazine and pulled out and passed through the slit opening of the magazine, the unevenness of the rim rubs against or combines with the slit opening, which hinders the pulling out of the strip of photosensitive material. was occurring.

To provide an improved packaging body for a strip-shaped photosensitive material, which eliminates the drawbacks of the prior art and can be smoothly pulled out from a slit opening of a magazine and protects the strip-shaped photosensitive material wound into a roll from light and moisture. For this purpose, the present inventor proposed two disc-shaped end face covers that cover the end faces of a strip-shaped photosensitive material that is wound in a roll around a core and has a generally flat end face, and a disc-shaped end face cover that covers the outer peripheral surface of the roll of the strip-shaped photosensitive material. and a light-shielding cover, the light-shielding cover is provided so that the tip of a leader extended to the strip-shaped photosensitive material or the tip of the strip-shaped photosensitive material is partially exposed on the outer circumferential surface, and the light-shielding The cover is wider than the width of the strip-shaped photosensitive material, and the wide portions on both sides are provided with a notch perpendicular to the disc-shaped end cover and deep enough not to reach the end cover, and then attached to the end cover. We previously proposed a band-shaped photosensitive material package characterized by its structure (Utility Application No. 58-106304).

The present invention further improves the above-mentioned invention and solves practical problems such as adhesive adhesion to the photosensitive material to be packaged and light leakage.

[Purpose of invention]

An object of the present invention is to provide an improved package for a photosensitive material strip that is smoothly pulled out from a slit opening of a magazine and that protects the photosensitive material strip wound into a roll from light and moisture. .

[Structure of the idea]

The object of the present invention is to provide two disk-shaped end face covers that cover the end faces of a strip-shaped photosensitive material that is wound around a core in a roll shape and has a generally flat end face, and a light-shielding cover that covers the outer peripheral surface of the strip-shaped photosensitive material roll. This can be achieved by a package of a band-shaped photosensitive material, which is characterized in that the package consists of a cover and is further provided with two disc-shaped covers that cover the portion corresponding to the end surface.

[Embodiment]

Next, the present invention will be described in more detail with reference to the attached drawings.

In FIG. 1, a strip of photosensitive material 1, such as photographic paper or film, is wound around a core 2 to form a roll 4 having generally flat end faces 3, 3'. Disc-shaped end covers 5, 5' are provided on the end faces 3, 3' to cover the end faces 3, 3', while the strip-shaped photosensitive material roll 4 has a light-shielding cover 6 on its outer peripheral surface as shown in FIG. It is designed to be covered like this. As shown in FIGS. 1 and 2, the light-shielding cover 6 is arranged so that the tip of the leader 7 extending from the strip-shaped photosensitive material 1 is partially exposed on the outer circumferential surface and extends around the outer circumference at least once. establish. Further, as shown in FIG. 1, the light-shielding cover 6 is made wider than the strip-shaped photosensitive material 1, and the wide portions 8, 8' are perpendicular to the disc-shaped end covers 5, 5'. Cuts 9, 9' with a depth that does not reach ' are provided. In FIG. 1, reference numeral 10 denotes a joint between the band-shaped photosensitive material 1 and the leader 7, 11 an adhesive tape piece provided at the tip of the leader 7, 12 an adhesive provided on the end cover for adhesion to the core 2, and 13 , 13' are notches provided in the circumferential direction of the light-shielding cover 6, but these are not necessarily essential requirements. As shown in FIG. 2, the wide parts 8, 8' of the light-shielding cover 6 are
5', and two disk-shaped covers 15, 15' are provided to cover the portion corresponding to the end surface, thereby completing the strip-shaped photosensitive material package of the present invention.

When using the band-shaped photosensitive material package according to the present invention, for example, it is placed in a magazine 21 as shown in FIG. By pulling out the magazine 21, the light-shielding and moisture-proof packaging is released and the photosensitive material can be supplied to a camera or the like in an unexposed state.

In another embodiment shown in FIG. 5, the leader is not used, and the light-shielding cover 6 is provided so that the tip end of the strip-shaped photosensitive material 1 is partially exposed on the outer circumferential surface and so as to go around the outer circumference at least once, The light-shielding cover 6 is made wider than the strip-shaped photosensitive material 1, and the wide portions 8, 8' are provided with
Cuts 9, 9' are provided perpendicularly to the disc-shaped end covers 5, 5' and have a depth that does not reach the end covers 5, 5'. In FIG. 5, the light-shielding cover 6 is provided with sawtooth-shaped cuts 14 in place of the cuts 13, 13' in FIG. In this embodiment, the subsequent explanation is similar to the explanation regarding FIGS. 2 to 4, and will therefore be omitted. When this embodiment is put into practice, a portion of the tip of the strip-shaped photosensitive material 1 is exposed to light, which is a waste, but is not necessarily disadvantageous considering the additional steps required to provide a leader.

In the present invention, it is desirable to use a sheet material mainly made of aluminum foil, for example, as the end covers 5, 5' and the light shielding cover 6. Furthermore, when applying the adhesive 12 to the end covers 5, 5', it is desirable to use the minimum necessary amount so that it adheres only to the core 2 by gravure coating or the like and does not adhere to the end faces 3, 3'. . Further, when using the leader 7, it is desirable to use one having opacity to the extent that light rays are not refracted from the end and reach the inside.

According to the present invention, in FIG. 4, when the leader or the strip-shaped photosensitive material is pulled out from the slit-shaped opening 23 of the magazine 21, the wide notched portions 8, 8' together with the disc-shaped end covers 5, 5' Since it remains inside the magazine, the uneven portion will not rub against or engage with the slit-shaped opening 23, thereby preventing the drawer from being obstructed.

As shown in FIG. 6, disc-shaped end covers 5, 5'
By providing the radial reinforcing ribs 16, the bending rigidity of the covers 5, 5' can be increased, so that deformation of the covers can be prevented during the production process.

As shown in FIG. 7, by providing a glue removing portion 17 near the bending portion of the light-shielding cover 6, it is possible to prevent glue from adhering to the photosensitive material when the light-shielding cover 6 is bent. In this case, desizing can be easily achieved by employing, for example, a gravure coating method. Further, it is preferable that the width of the desizing cut not reach the notch 9 in order to completely maintain the light shielding property.

〔Example〕

Examples are given below to make the effects of the present invention more clear.

Example: (1) Light-shielding material A 16 μm thick biaxially stretched polyester film was laminated on both sides of a 10 μm thick aluminum foil with a 3 μm thick urethane and isocyanate adhesive layer.
A light shielding material with a thickness of 48 μm was created. At this time, 5 carbon black particles with a particle size of 10 to 20 μm were added to the adhesive layer.
Part by volume was mixed in.

(2) Leader material A 100 μm thick polyester film containing 1 part by volume of carbon black with a particle size of 10 to 20 μm was prepared by a stretching method.

(3) Adhesive A hot-melt adhesive mainly composed of ethylene-vinyl acetate copolymer was prepared.

(4) Strip-shaped photosensitive material A strip-shaped photosensitive material consisting of a black and white silver salt emulsion layer with a thickness of 150 μm, a width of 70 mm, and an ASA sensitivity of 100 coated on a cellulose triacetate base is wound around a core 2 with a length of 70 mm and an outer diameter of 50 mm. In FIG. 1, the cylindrical roll 4 had dimensions of 80 mm in outer diameter and 70 mm in length.

(5) Disc-shaped end cover The adhesive described in paragraph (3) is applied in advance to the light-shielding material described in paragraph (1) in a circular shape with a diameter of 50 mm using a gravure coating method, and this is applied to the adhesive layer of the circular shape. From the center of 12,
It was punched out into a disk shape with an inner diameter of 25 mm and an outer diameter of 80 mm to form the disk-shaped end covers 5, 5', 15, and 15' shown in FIG.

(6) Leader Cut the leader material described in (2) into a rectangle with a length of 370 mm and a width of 70 mm, cut off the tip into a tapered shape, and connect it to the tip of the strip-shaped photosensitive material described in (4). 1st
This is leader 7 in the figure.

(7) Light-shielding cover Cut the light-shielding material described in paragraph (1) into a rectangle with a length of 270 mm and a width of 100 mm, and then cut the end face 3 of the strip-shaped photosensitive material roll 4 described in paragraph (4) from the long side of the rectangle. 3', 39 cuts with a depth of 10 mm were made at 7 mm intervals, and as shown in Figure 7, the width was 3 mm and the length was 270 mm.
A glue-removal portion 17 was provided to form the light-shielding cover 6 in FIG. The pasting position was 80 mm from the tip of the leader.

(8) Package The elements described in items (3) to (7) were combined to form a package for the strip-shaped photosensitive material shown in FIG. The tip of the leader is now exposed by 80mm.

The above package is 100mm long, 80mm wide, and 100mm high.
mm, the slit width of the slit opening is 3 mm, the slit opening has light-shielding terrestrial material on the top and bottom of the slit opening, and when it is loaded into a plastic magazine of the shape shown in Fig. 3 and pulled out as shown in Fig. 4, there is no resistance to drawing it out. The weight was constant at 800g, and the light was completely blocked, so there was no problem in practical use.

Comparative example: Using almost the same materials as the above example,
When the package described in Publication No. 113543 was pulled out in the same manner as in the examples, the resistance to pull out was 1000 g, which fluctuated widely and was problematic in practice.

〔effect〕

As described above, according to the present invention, since two disc-shaped covers are further provided to cover the portion corresponding to the end surface, the strip-shaped photosensitive material is more securely protected from external light.
It becomes a practical package for a strip-shaped photosensitive material.

[Brief explanation of the drawing]

1 to 5 are views showing embodiments of the present invention, in which FIG. 1 is an exploded perspective view of a strip-shaped photosensitive material roll having a protective package including a leader and two end covers, and FIG. 1 is a perspective view of a package of the band-shaped photosensitive material according to the present invention assembled from FIG. 1, FIG. 3 is a perspective view showing the package of the present invention loaded in a magazine, and FIG. 4 is a perspective view of the magazine with its lid closed. FIG. 3 is a perspective view showing a state in which the lid is closed and the reader is pulled out. FIG. 5 is a perspective view similar to FIG. 1 showing another embodiment of the present invention. FIG. 6 is a front view of the disc-shaped end covers 5, 5';
FIG. 7 is an enlarged development view of the light-shielding cover 6 and the reader 7. 1... Band-shaped photosensitive material, 2... Core, 3, 3'...
...End face, 4...Roll, 5, 5', 15, 15'...
...Disc-shaped end cover, 6... Light-shielding cover, 7...
Leader, 9, 9'...notch, 21...magazine.

Claims (1)

[Claims for Utility Model Registration] (1) Two disk-shaped end covers that cover the end faces of a strip-shaped photosensitive material that is wound around a core in a roll and has a generally flat end surface, and the outer peripheral surface of the strip-shaped photosensitive material roll. What is claimed is: 1. A package for a strip-shaped photosensitive material, characterized in that the package is made up of a light-shielding cover that covers a light-shielding cover, and further includes two disc-shaped covers that cover a portion corresponding to the end surface. (2) The package for a band-shaped photosensitive material according to claim 1, wherein the disc-shaped end cover has radial ribs.