JP2001033916A - Roll film for photographing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a roll film for photographing which is sanitary and which can be easily and surely sealed. SOLUTION: Self-adhering type first and second adhesive layers 22 and 23 are provided on both end parts of a tape 20 for sealing provided on a light shielding trailer 13 side, and a gap L1 between the layers 22 and 23 is previously adjusted so as to be equal to the outside peripheral length of the roll film 10 taken up to a spool. After the film 10 is used, the tape 20 is wound around along the outside periphery of the film 10 so as to make the layers 22 and 23 face and adhere, and the film 10 is sealed in a light tightness state.

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 which can be sealed in a sanitary, simple and reliable manner.

[0002]

2. Description of the Related Art A photographic roll film is formed by winding a band-shaped photographic film having a width of about 6 cm around a spool and tape-fixing the leading end of a light-shielding paper. 120 type and 220 type brownie films are well known. . 120
A roll film of the type is a type in which a photographic film is stored in a light-tight manner by covering the entire base surface of the photographic film with a light-shielding paper longer than the photographic film. on the other hand,
The 220-type roll film is a light-tight storage of photo film by joining light-shielding paper called a light-shielding leader and a light-shield trailer to both ends of the photo film instead of omitting the light-shielding paper that covers the entire base surface of the photo film. The length of the photographic film is about twice as long as that of the 120 type roll film.

[0003] When the roll film is set in the film loading chamber and the photographing is advanced, the roll film is wound on a spool provided in advance in the film winding chamber of the camera. When the operation is performed, the rear end of the light-shielding paper is detached from the spool of the film loading chamber, and the entire photo film and the light-shielding paper are wound on the spool of the film winding chamber. A sealing tape coated with an adhesive that activates by re-wetting is provided on the outer peripheral surface of the rear end of the roll film, and the photographer licks the adhesive while holding it with a finger so that the shading paper does not loosen The roll film is sealed by pressing the sealing tape against the light-shielding paper.

However, since an adhesive activated by licking is not preferable for hygiene, a method for sealing a roll film light-tight without licking the adhesive is desired. Therefore, as disclosed in Japanese Utility Model Application Laid-Open No. 5-47944, a method has been proposed in which a release surface is provided on a light-shielding paper, and a sealing tape is peeled off from the release surface during use to perform sealing. Further, JP-A-10-104803 discloses that
One in which the pressure-sensitive adhesive layer fixed to the sealing tape and the release layer are bent and the pressure-sensitive adhesive layer is stored in the sealing tape, and JP-A-11-7104 discloses that the light-shielding paper has There has been proposed a device in which a provided self-adhesive adhesive patch is attached and sealed.

[0005]

However, according to the technique disclosed in Japanese Utility Model Laid-Open No. 5-47944, if the sealing tape is peeled off in the camera, there is a possibility that the adhesive will cause contamination. Also, JP-A-10-104803
In the publication shown in the publication, contamination by the adhesive does not occur, but the folded sealing tape is thick,
Since the pressure at the contact point between the sealing tape and the photographic film is increased, it causes factors such as image reflection and light fog. Furthermore, in the example disclosed in Japanese Patent Application Laid-Open No. 11-7104, if the installation position of the adhesive patch is shifted, the roll film cannot be sealed, so that the winding may be loosened.

SUMMARY OF THE INVENTION An object of the present invention is to provide a photographic roll film which can be sealed in a sanitary manner, can be easily and securely sealed, and does not adversely affect the photographic film.

[0007]

In order to achieve the above object, a photographic roll film according to the present invention comprises a strip-shaped photographic film, a spool around which the photographic film is wound from a rear end, and at least both ends of the photographic film. And a light-shielding paper that is wound around another spool together with the photo film after shooting is completed, and is attached to the outer peripheral surface of the rear end of the light-shielding paper, and is wound around the spool together with the light-shielding paper when not in use. In a photographic roll film comprising a sealing tape for sealing the light-shielding paper so that the light-shielding paper is not loosened after the photographing, the sealing tape is an end portion of one surface when wound around the outer periphery of the light-shielding paper after the photographing is completed. A strip-shaped tape base material having a length capable of facing each other, and a layer provided on at least both ends of one surface of the tape base material. The self-adhesive sealing adhesive layer, the sealing adhesive layer is provided on the same surface as the sealing adhesive layer and at a different position from the sealing adhesive layers provided at both ends, and the tape base material is provided. And a mounting adhesive layer attached to the light-shielding paper.

The sealing tape is attached to the outer peripheral surface of the light-shielding paper such that the edges of the light-shielding paper can face each other with the edge of the light-shielding paper interposed therebetween after photographing. A tape and a second sealing tape, wherein the first and second sealing tapes each include a tape base, and a self-adhesive sealing adhesive layer provided on one surface of the tape base. And a mounting adhesive layer which is provided on the same plane as the sealing adhesive layer, and which attaches the tape base material to the end of the light-shielding paper.

Further, the sealing tape has a tape base having a length that can be stuck to an end portion of a light-shielding paper wound around a spool after photographing and an outer peripheral surface, and one surface of the tape base. It is attached on a release paper attached to a light-shielding paper such that the longitudinal direction is parallel to the axial direction of the spool, and after the photographing is completed, the sealing tape is removed from the release paper. It is characterized by being peeled off, affixed to the rear end portion of the light-shielding paper and the outer peripheral surface, and sealed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The photographic roll film of the present invention will be described below using a 220 type roll film. As shown in FIGS. 1 and 3, a photographic roll film (hereinafter, abbreviated as a roll film) 10 includes a photographic film 11, a light-shielding reader 12, a light-shielding trailer 13, and a spool 18. The photo film 11 is formed in a belt shape, and has a bonding tape 14 at its front end.
The light-shielding leader 12 is joined, and the light-shielding trailer 13 is joined to the rear end by a joining tape 15.
At the end of the light-shielding trailer 13, a sealing tape 20 is provided for sealing the light-shielding trailer 13 so that the light-shielding trailer 13 does not loosen after photographing.

Light shielding reader 12 and light shielding trailer 13
When the photo film 11 is wound around the spool 18, the photo film 11 is wound so as to cover the outer periphery thereof.
1 is formed of a light-shielding paper having a sufficient length so that it can be sealed light-tight. In addition, the joining tape 1 on the light shielding trailer side
4 is provided with a bar code indicating the type of the photo film 11, the ISO film sensitivity, and the like. By reading this bar code with a bar code reader provided inside the camera, the film information is transmitted to the camera body. Is done.

As shown in FIG. 2 which is a cross-sectional view of the sealing tape 20, the sealing tape 20 is composed of a tape base 21 and a sealing base provided on both ends of one surface of the tape base 21. First adhesive layer 22 and second adhesive layer 2 that are adhesive layers
3 and a third adhesive layer 24 which is an adhesive layer for attachment. As the tape base material 21, a paper material such as glassine paper or a resin tape is used.
m.

The first and second adhesive layers 22 and 23 have
A self-adhesive type of adhesive is used when the same type of adhesives come into contact with each other, but does not adhere to a photographic film or a light-shielding paper. Examples of the self-adhesive type adhesive include "Besar (trade name)" manufactured by Nippon Optical Fiber Co., Ltd., which contains a natural rubber-based substance as an ingredient, and "Selfa (trade name)" manufactured by Nippon Rika Paper Co., Ltd. ) "Can be used. Further, the thickness for applying the self-adhesive type adhesive is 20
To 50 μm, preferably 30 to 40 μm, and more preferably 30 μm.

The distance L1 between the first and second adhesive layers 22 and 23 is determined by the length of the roll film 10 wound around the spool.
Is equal to the outer peripheral length of. Therefore, after photographing is completed, the first and second adhesive layers 23 can face each other and can be joined.

The third adhesive layer 24 is provided between the first and second adhesive layers 22 and 23, for example, adjacent to the second adhesive layer 23. 13 used to attach. Third adhesive layer 24
, An olefin-based hot-melt adhesive is mainly used, and the applied thickness is 30 μm.
The third adhesive layer 24 is overlaid on the light-shielding trailer 13 after activating the adhesive by heating, and affixes the sealing tape 20 to the light-shielding trailer 13 by applying pressure.

The operation of the photographic roll film having the above configuration will be described. When the roll film 10 has not been photographed, the sealing tape 20 is on the inner periphery of the roll film 10 and is wound around the spool 18 together with the light shielding trailer 13. At this time, since the first and second adhesive layers 22 and 23 are separated by the light-shielding trailer 13, the self-adhesives do not come into contact with each other before photographing and are joined.

The roll film 10 is set in the film chamber of the camera, and the leading end of the light-shielding reader 12 is locked on a winding spool set in the winding chamber in advance. Each time a photograph is taken by the camera, the photographic film 11 is taken up on a take-up spool. And when the shooting of all frames is completed. The light-shielding trailer 13 is wound around the take-up spool and can be taken out of the camera.

As shown in FIG. 3, the roll film 10 taken out of the camera has a sealing tape 20 exposed on its outer surface. After winding the sealing tape 20 around the outer periphery of the roll film 10, the user bends the first and second adhesive layers 22 and 23 so that they face each other, and makes them contact each other. Then, as shown in FIG. 4, the outer periphery of the light shielding trailer 13 is suppressed by the sealing tape 20, so that the photographic film 11 is sealed light-tight. Further, since the length of the sealing tape 20 is adjusted in advance, the winding of the light shielding trailer 13 does not occur.

In the above embodiment, the second and third
The adhesive layer was provided adjacently when the photo film 11 was wound around the spool 18 from the light shielding trailer 13 side.
This is to prevent the sealing tape 20 from being bent. Therefore, if the sealing tape 20 is to be guided when wound around the spool 18, the third adhesive layer 2
4 may be provided at an appropriate position between the first and second adhesive layers. Alternatively, a self-adhesive sealing adhesive layer may be provided over the entire area of the tape base material 21, and a mounting adhesive layer may be provided on the sealing adhesive layer.

In the above embodiment, one tape substrate 21
Although the sealing tape 20 is formed by the above, the sealing tape may be formed by using two tape base materials. Hereinafter, a second embodiment in which a sealing tape is configured using two tape bases will be described. Note that the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

As shown in FIG. 5 and FIG.
3, the first and second sealing tapes 30a, 30a
b is stuck. First and second sealing tapes 30
a and 30b are tape bases 31a and 31b, respectively.
A sealing adhesive layer 32a, 32b provided on one surface of the tape base material 31a, 31b;
Adhesive layers 33a, 33 used for attachment to
b. A self-adhesive adhesive is used for the sealing adhesive layers 32a and 32b, and the mounting adhesive layer 33 is used.
Hot melt adhesives are used for a and 33b.

The distance L2 between the sealing adhesive layers 32a and 32b
Is equal to the outer peripheral length of the roll film 10. For this reason, as shown in FIG. 7, after the photographing is completed, the end of the light-shielding trailer 13 is bent inward at the dotted line portion 36, and the sealing adhesive layers 32a and 32b are faced and adhered, so that the light-shielding trailer 13 is attached. It can be sealed so that it does not loosen. In this embodiment, since the sealing tape does not have to be wound around the outer periphery of the light-shielding trailer 13, the usability of the user is improved.

When the sealing tape is composed of one sheet, its length is adjusted to the outer peripheral length of the roll film 10. Therefore, even if the sealing tape is slightly displaced, the light-shielding trailer can be used. 13 can be sealed without loosening. However, when the sealing tape is composed of two sheets, the sticking error becomes large and the winding may be loosened. For this reason, in the second embodiment, the end of the light-shielding trailer 13 is bent inward to increase the winding diameter, thereby preventing the winding from becoming loose.

In the first and second embodiments, the sealing tape is used while attached to the light-shielding trailer.
It is also possible to peel off the sealing tape once from the light-shielding trailer and affix it again to the outer periphery of the light-shielding trailer to seal.
Hereinafter, the third embodiment will be described. The same parts as those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 8 and FIG.
The sealing tape 40 provided at the end of No. 3 is composed of a tape base material 41 and an adhesive layer 42 provided on one side of the tape base material 41. A release paper 43 having the same shape as the tape base material 41 is attached to an end of the light-shielding trailer 13 by a hot-melt adhesive 44 so that the longitudinal direction thereof is parallel to the axial direction of the spool 18. The surface of the release paper 43 opposite to the surface adhered to the light-shielding trailer 13 is a release surface to which a release agent such as silicon is applied. The sealing tape 40 is held by the light-shielding trailer 13 in a state of being attached to the release surface of the release paper 43.

The photographed roll film 10 taken out of the camera is in a state where the sealing tape 40 is exposed on the outer peripheral surface of the light shielding trailer 13. After peeling off the sealing tape 40 from the light-shielding trailer 13 once, the user adjusts the longitudinal direction of the sealing tape 40 to the circumferential direction of the spool 18 and the end of the light-shielding trailer 13 as shown in FIG. By affixing to the outer peripheral portion, sealing can be performed so that loosening does not occur.

The sealing tape 40 and the release paper 43 are set along the axial direction of the spool 18 so that the light-shielding trailer 1
The reason for sticking to 3 is to prevent the occurrence of roll-up or optical fog due to the overlapping of the sealing tape 40 when not in use. For this reason, the width W of the sealing tape 40 needs to be smaller than the peripheral length (about 40 mm) of the light-shielding trailer 13 in a portion where the sealing tape 40 is wound around the spool 18 when not used. If the width W of the sealing tape 40 is too small (about 5 mm), the rigidity of the sealing tape 40 causes the edge in the width direction of the sealing tape 40 to rise from the release paper 43. A gap that cannot secure light-shielding properties is formed. Therefore, the width W of the sealing tape 40 is 5 to 40.
mm, preferably 10 to 30 mm.

In each of the above embodiments, a 220 type photographic roll film has been described as an example. However, the present invention can be similarly applied to a 120 type photographic roll film.

[0029]

As described above, according to the photographic roll film of the present invention, since a self-adhesive type adhesive is used, there is no need to lick the adhesive as in the prior art, and it is simple and hygienic. Sealing work can be performed. In addition, since the sealing tape is wound around the spool without being bent in the photographic roll film when not in use,
It is possible to prevent the sealing tape from becoming thick or rolled up, or from deteriorating light-shielding properties.

Further, in a photographic roll film using a sealing tape using an adhesive, the release paper to which the sealing tape is attached is attached to the light-shielding trailer. Also has good productivity and can obtain stable peel strength. In addition, since the sticking between the sealing tape and the release paper is also stabilized, contamination in the camera due to the adhesive does not occur.

[Brief description of the drawings]

FIG. 1 is a developed plan view showing the structure of a photographic roll film of the present invention.

FIG. 2 is a cross-sectional view showing the structure of the sealing tape.

FIG. 3 is a perspective view showing an appearance of a photographic roll film after photographing is completed.

FIG. 4 is a perspective view showing the appearance of the photographic roll film after sealing.

FIG. 5 is a developed plan view showing the structure of a photographic roll film according to a second embodiment.

FIG. 6 is a cross-sectional view illustrating a structure of a sealing tape according to a second embodiment.

FIG. 7 is a perspective view illustrating an appearance of a photographic roll film according to a second embodiment.

FIG. 8 is a developed plan view showing the structure of a photographic roll film according to a third embodiment.

FIG. 9 is a cross-sectional view illustrating a structure of a sealing tape according to a third embodiment.

FIG. 10 is a perspective view illustrating an appearance of a photographic roll film according to a third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Photo roll film 11 Photo film 12 Shading leader 13 Shading trailer 18 Spool 20, 30a, 30b, 40 Sealing tape 21, 31a, 31b, 41 Tape base material 22, 23, 32a, 32b Sealing adhesive layer 24, 33a, 33b Mounting adhesive layer 42 Adhesive layer 43 Release paper

Claims (3)

[Claims] 1. A belt-like photo film, a spool around which the photo film is wound from a rear end, and a photo film provided at at least both ends of the photo film. After photographing is completed, the photo film is wound around another spool together with the photo film. A photographic roll consisting of a light-shielding paper that shields light and a sealing tape that is attached to the outer peripheral surface of the rear end of the light-shielding paper, is wound around the spool together with the light-shielding paper when not in use, and seals the light-shielding paper so that it does not loosen after shooting. In the film, the sealing tape is a band-shaped tape base material having a length such that the ends of one surface can face each other when wound around the outer periphery of the light-shielding paper after photographing, and one of the tape base materials. A self-adhesive sealing adhesive layer provided at least on both ends of the surface, and the same surface as the sealing adhesive layer, and both Parts are So設 in different positions and So設 been sealed adhesive layer, the roll photo film, characterized in that comprising a mounting adhesive layer for attaching the tape base material to the backing paper. 2. A belt-like photo film, a spool around which the photo film is wound from a rear end, and a photo film which is provided at least at both ends of the photo film and is wound around another spool together with the photo film after photographing is completed. For photographic use, a light-shielding paper for light-shielding, and a sealing tape that is attached to the outer peripheral surface of the rear end of the light-shielding paper and is wound around the spool together with the light-shielding paper when not in use, and seals the light-shielding paper so that it does not loosen after shooting is completed. In the roll film, the sealing tape is a first sealing tape attached to the outer peripheral surface of the light-shielding paper such that the edges of the light-shielding paper can face each other with the edge of the light-shielding paper sandwiched after photographing is completed. And a second sealing tape, wherein the first and second sealing tapes are:
A tape substrate, a self-adhesive sealing adhesive layer provided on one surface of the tape substrate, and a layer provided on the same surface as the sealing adhesive layer, and shielding the tape substrate from light. A photographic roll film comprising a mounting adhesive layer attached to an end of a paper. 3. A strip-shaped photo film, a spool around which the photo film is wound from the rear end, and a photo film provided at at least both ends of the photo film. After the photographing is completed, the photo film is wound around another spool together with the photo film. For photographic use, a light-shielding paper for light-shielding, and a sealing tape that is attached to the outer peripheral surface of the rear end of the light-shielding paper and is wound around the spool together with the light-shielding paper when not in use, and seals the light-shielding paper so that it does not loosen after shooting is completed. In a roll film, the sealing tape is a tape base material having a length that can be stuck to an end portion of a light-shielding paper wound around a spool and an outer peripheral surface after photographing, and one surface of the tape base material. It is composed of a pressure-sensitive adhesive layer and affixed on a release paper attached to a light-shielding paper so that the longitudinal direction is parallel to the axial direction of the spool. Is, peeling off the sealing tape from the release paper after the shooting, the roll photo film, characterized in that to seal by attaching the rear end portion and the outer peripheral surface of the backing paper.