JPH11271935A - Roll film for photograph - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a roll film for a photograph which can be quickly and surely sealed in sanitary by eliminating the licking work of adhesive agent and which is formed so that a tape for sealing is not peeled in a camera or in a winding-in process. SOLUTION: The tapes for sealing 6a and 6b are folded in Z-shaped. The tapes 6a and 6b are constituted of a ribbon-like soft tape base material 11, adhesive layers 12a and 12b made to adhere by the pressure-sensitivity thereof, a peeling layer 13 coated with silicone and the like and a pseudo-adhesive layer 14 which is coated with the weak adhesive agent and which can be peeled again. The material 11 is formed of a paper, a thin resin tape and the like. The layers 12a and 12b are formed by coating the material 11 with the adhesive agent. When the tapes 6a and 6b are folded in Z-shaped, the layer 13 is formed at a part opposed to the layer 12b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic roll film, and more particularly to a photographic roll film that can be sanitized quickly and securely without the need to lick an adhesive.

[0002]

2. Description of the Related Art As a roll film for photography, about 6 c
There has been known a 120-type brownie film in which the base surface side of a strip-shaped photographic film having a width of m is covered with a strip-shaped light-shielding paper, wound around a spool in the form of a roll, and the leading end of the light-shielding paper is fixed with a paper tape. To use this photographic roll film, first, a spool of the same shape is set in the film winding chamber of the camera.

After setting the photographic roll film in the film loading chamber, peeling off the paper tape and inserting the leading end of the light-shielding paper into the slit of the spool in the film winding chamber,
A winding operation is performed to wind up a predetermined amount of light-shielding paper on the spool. When the arrow mark printed on the surface of the light-shielding paper matches the start mark of the camera, stop the winding operation and close the camera back cover. When the winding operation is further performed, a counter number "1" indicating that the first frame is set in the aperture is displayed on the film counter, the winding operation is stopped, and the preparation for photographing is completed.

[0004] As the photographing progresses, the exposed photographic film together with the light-shielding paper is wound on a spool in a film winding chamber. After all frames have been shot, if the winding operation is further performed, the rear end of the light-shielding paper will come off from the spool in the film loading chamber, and all of the photo film and the light-shielding paper will be wound on the spool in the film winding chamber. Taken. Thereafter, the back cover of the camera is opened, and the exposed photographic roll film is taken out of the film winding chamber while holding the light-shielding paper with a finger so as not to be loosened.

[0005] In this photographic roll film, a sealing tape is attached to the surface of the rear end portion of the light-shielding paper with one end portion of the tape being adhered. The inner surface of the other end of the sealing tape is coated with an adhesive that is activated by rewetting, so if the user licks and presses against the surface of the light-shielding paper or the sealing tape, the light-shielding paper does not loosen. The exposed photographic roll film is sealed as described above.

[0006] However, photographers who take a large number of
Frequent licking of the adhesive of the sealing tape sometimes made the user feel sick. Recently, the PL law (product liability law) has been enacted, and it has been suggested that an adhesive that is activated by licking is not hygienic. So, for example,
As described in Japanese Utility Model Laid-Open No. 5-47944,
There has been proposed a method in which release paper is provided on a sealing tape and the release paper is peeled off and sealed when used.

However, in the photographic roll film described in the above publication, if the release paper is peeled off in the camera, there is a possibility that a trouble such as sticking of the sealing tape to the film pressure plate may occur. In addition, the release paper may be peeled off during the winding process during film production, which makes practical use difficult. For this reason, for example, Japanese Patent Application No. 8-26079
No. 2 proposes folding a sealing tape into a U-shape.

[0008]

However, in the photographic roll film as described above, if the curvature of the film passage of the camera is high and narrow, the adhesive surface of the adhesive rear end of the sealing tape passes through the film passage of the camera. When it passed, it was sometimes peeled from the release layer.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a photographic roll film that can quickly and reliably seal in a hygienic manner without the need to lick the adhesive and that does not peel off the sealing tape in the camera or in the winding process. .

[0010]

In order to achieve the above object, according to the present invention, a strip-shaped photographic film, light-shielding paper provided at least at both ends of the photo-film, and an end of the light-shielding paper are inserted. Wherein the light-shielding paper comprises a spool on which the light-shielding paper and the photo film are wound with the light-shielding paper surface facing outward, and a sealing tape attached to an end of the light-shielding paper. An adhesive layer and a release layer are applied adjacently to the rear end of the paper, and a re-peelable pseudo-adhesive layer is provided on the opposite surface folded and overlapped in a Z-shape or S-shape at the boundary between the two layers. Provided, and
A tape having a tab portion is adhered, and after winding the photographic film to the rear end, the rear end of the light-shielding paper can be sealed with the adhesive layer.

According to a second aspect of the present invention, the sealing tape, which is removably adhered to the light-shielding paper, is positioned so as to be positioned in the slit when the end of the light-shielding paper is inserted into the slit of the spool. It was done.

[0012]

FIG. 2 is an external perspective view showing a photographic roll film of the present invention, and FIG. 5 is a plan view showing a spool thereof. The 120-type and 220-type brownie films 1 are formed by winding a photo film 19 with a light-shielding paper comprising a photo film 3 (see FIGS. 3 and 4) and a light-shielding paper 4 on a shaft 2a of a spool 2 in a roll shape. One end 4a of the paper 4 is folded and fixed with a sealing tape 6a. Also, flanges 2b are provided at both ends of the shaft portion 2a.
Are formed.

FIG. 3 shows a state in which a 120-type photographic film 19 with light-shielding paper is straightened. The 120-type brownie film has a standard length in which the number of frames that can be taken by the photo film 3 becomes 15 (or 16), for example, when the screen size of the photographed frame is 41.5 × 56 mm. There are two types: a standard type (hereinafter referred to as 120 standard type) and a type having a length of 8 frames (or 7 frames) (hereinafter referred to as 120 half type). In addition, 120 standard type and 12
If there is no need to distinguish between the 0 half type, these are collectively referred to as 120 types.

The light-shielding paper 4 is longer than the photographic film 3, and sealing tapes 6a and 6b, which will be described in detail later, are attached to both ends 4a and 4b of the surface. The photo film 3 is overlapped so that its base surface is aligned with the black back surface of the light-shielding paper 4.
Are joined to the light-shielding paper 4 by the joining tape 7 at the tip of the. The bonding tape 7 includes the ISO of the photo film 3
A bar code expressing film sensitivity and the like is described.

FIG. 4 shows a 220 type photographic film 19 with light-shielding paper. In this 220 type,
The light-shielding paper 8 is composed of a leader paper 8a joined to the leading end of the photographic film 3 with a joining tape 7, and a trailer 8b joined to the rear end of the photographic film 3 with a joining tape 9. A bar code expressing the ISO film sensitivity and the like of the photographic film 3 is written on the bonding tape 7.

The end of the leader paper 8a and the trailer 8
Sealing tapes 6a and 6b are also attached to the end of b. The 220 type photo film 3 is about twice as long as the 120 standard type. For example, if the screen size of the frames to be photographed is semi-sized, the number of photographable frames is 30 frames.

The end portions 4a, 4b, 8a, 8 of these 120 and 220 type photographic films 19 with light-shielding paper.
b is inserted into a slit 2c provided in the shaft portion 2a of the spool 2, as shown in FIG.

FIG. 1A is a side view of the sealing tape,
(B) and FIG. 7 showing the appearance of the sealing tape.
The sealing tapes 6a and 6b are folded in a Z-shape. The sealing tapes 6a and 6b are made of pressure-sensitive adhesive layers 12a and 12a that adhere to the ribbon-shaped flexible tape base material 11 by pressure sensitivity.
b, a release layer 13 to which silicone or the like is applied, and a pseudo-adhesive layer 14 to which a weak adhesive is applied and which can be removed again. The tape base 11 is formed of paper, a thin resin tape, or the like. The adhesive layers 12a and 12b are formed by applying an adhesive to the tape substrate 11. On the other hand, when the sealing tapes 6a and 6b are folded in a Z-shape, a release layer 13 is provided in a portion facing the adhesive layer 12b.

As shown in FIG. 6, when both ends 4a and 4b of the light-shielding paper 4 are inserted into the slits 2c of the spool 2, most of the sealing tapes 6a and 6b 2c.

The operation of the photographic roll film having the above configuration will be described. In the manufacturing process of the brownie film 1, the end 4 b of the light-shielding paper 4 to which the sealing tape 6 b is attached is inserted into the slit 2 c of the spool 2.
Then, the spool 2 is rotated to wind up the photo film 19 with the light-shielding paper, and the end 4a is fixed so as not to be loosened by the sealing tape 6a attached to the end 4a of the light-shielding paper 4.

At this time, the sealing tape 6b adhered to the end 4b of the light-shielding paper 4 wound around the innermost periphery of the spool 2.
1A, as shown in FIG. 1A, is bonded to the upper tape base material 11 by a removable pseudo-adhesive layer 14 in a state of being folded into a Z-shape so as to maintain the Z-shape. Therefore, even if the end portion 4b is bent when wound around the spool 2, the release layer 13 and the adhesive layer 12b are separated, and the end portion of the sealing tape 6b is attached to the back surface of the first light shielding paper 4. There is no sticking.

Further, as shown in FIG. 6, when the end 4b of the light-shielding paper 4 is inserted into the slit 2c of the spool 2, most of the sealing tape 6b is positioned within the slit 2c of the spool 2. This also prevents the end of the sealing tape 6b from peeling off and sticking to the back surface of the first light-shielding paper 4.

After the brownie film 1 has been loaded into the camera and all the photographing operations have been completed, if the operation of winding up the camera is continued, all the photo filmstrips 19 with light-shielding paper are wound around the take-up spool. Then, the adhesive layer 12a of the sealing tape 6b is peeled off from the peeling layer 13 (see FIG. 1B), and the outermost periphery of the light-shielding paper 4 is sealed.
Then, the photo film with light-shielding paper 19 is fixed so as not to be loosened.

In the embodiment described above, a 120 type photographic roll film has been described, but a 220 type photographic roll film can be implemented in exactly the same manner.

[0025]

As described above, according to the present invention, a strip-shaped photo film, light-shielding paper provided at least at both ends of the photo film, and a slit into which the end of the light-shielding paper is inserted are provided. In a photographic roll film comprising a spool around which the light-shielding paper and the photo film are wound with the light-shielding paper surface facing outward, and a sealing tape attached to an end of the light-shielding paper, the rear end of the light-shielding paper An adhesive layer and a release layer are applied adjacent to each other, and a re-peelable pseudo-adhesive layer is provided on the opposite surface which is folded and overlapped in a Z-shape or S-shape at the boundary between the two layers, and a tab is provided. After the photo film is wound up to the rear end and the rear end of the light-shielding paper is made sealable with the adhesive layer, the operation of licking the adhesive is eliminated, and sanitary quick and reliable operation is achieved. Can be sealed, Sealing tape in camera within or entrainment process becomes possible to provide a photographic roll film which did not peel off.

[Brief description of the drawings]

FIG. 1 is a partial side view of a rear end portion of a light-shielding paper showing a structure of a sealing tape according to the present invention.

FIG. 2 is a perspective view illustrating a photographic roll film of the present invention.

FIG. 3 is an explanatory diagram showing a 120 type roll film with light-shielding paper.

FIG. 4 is an explanatory diagram showing a 220 type roll film with light-shielding paper.

FIG. 5 is a plan view showing the spool of FIG. 2;

FIG. 6 is an axial sectional view of the spool of FIG. 5;

FIG. 7 is an external perspective view of FIG.

[Explanation of symbols]

 2 Spool 4 Light-shielding paper 6a, 6b Sealing tape 11 Tape base material 12a, 12b Adhesive layer 13 Release layer 14 Pseudo-adhesive layer 19 Photo roll film

Claims (2)

[Claims] 1. A strip-shaped photo film, a light-shielding paper provided at least at both ends of the photo film, and a slit into which an end of the light-shielding paper is inserted. In a photographic roll film comprising a spool around which a photographic film is wound and a sealing tape affixed to an end of the light-shielding paper, an adhesive layer and a release layer are coated adjacent to the rear end of the light-shielding paper. A re-peelable pseudo-adhesive layer is provided on the opposite surface, which is folded and overlapped in a Z-shape or S-shape at the boundary line between the two layers, and a tape having a tab portion is attached thereto, and the photograph A roll film for photography, wherein a rear end portion of the light-shielding paper can be sealed with the adhesive layer after the film is wound up to a rear end. 2. The sealing tape, which is removably attached to the light-shielding paper, is located in the slit when the end of the light-shielding paper is inserted into a slit of the spool. The photographic roll film according to claim 1.