JP2002023315A - Rolled photographic film package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assure the shading performance of a rolled photographic film package without entailing an increase of a manufacturing cost and restriction on material selection. SOLUTION: This rolled photographic film package has a roll wound with a long-sized photographic material, a roll peripheral surface shading member for covering the outside surface of the roll and roll end face shading members and is hermetically closed at the peripheral edges of the end faces by spanning the heat shrinkable shading tape materials applied to the side edges of the roll peripheral surface shading member to the roll peripheral surface light shielding member by heat shrink.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll-shaped photosensitive material package that can be loaded into a magazine in a bright room.

[0002]

2. Description of the Related Art A long photosensitive material is wound into a roll.
It is used by loading it into a magazine under a bright room so that light can be shielded by the peripheral surface cover attached to the outermost periphery and the end surface cover attached to the end of the roll, and the drawer (leader) can be pulled out from the slit. There is a product form. In use, the peripheral cover is separated from the end cover by pulling the drawer, and the photosensitive material is pulled out from the slit of the magazine and used.

[0003] In such a roll-shaped photosensitive material package, various techniques for ensuring light shielding have been proposed. A technique is known in which an end cover having an outer diameter larger than the roll diameter is used, and a peripheral portion thereof is folded and bonded so as to overlap the peripheral cover, and at that time,
For example, Japanese Utility Model Publication No. 56-16608 discloses that a slit is provided in the peripheral portion of the end face cover.
It is described in Japanese Patent Application Laid-Open No. 8-240887 that the peripheral portion of the end cover is folded and adhered to the outer peripheral surface, and that the peripheral portion of the end cover is folded and wound around with a tape material to be closely adhered. I have. There is also known a technique in which the width of the peripheral surface cover is made larger than the width of the photosensitive material, and the side edges thereof are folded so as to overlap with the end surface cover and used by bonding. Providing slits on the side edges of the surface cover is
No. 4,420,96 proposes to double-fold the end face cover after folding.

Further, as a method of shielding light without forming a fold using a heat-shrinkable material (shrink material), European Patent No. 181,417 discloses a shrink material peripheral cover having a width wider than the width of a photosensitive material. Japanese Patent Application Laid-Open No. 2000-62854 discloses that the side edge portion is contracted to be folded down to shield the end face from light. It is described that the side edges are heat-shrinked, closed and light-shielded, respectively.

However, fogging may occur in the photosensitive material due to light entering from a tunnel-like minute light path caused by a fold caused by folding, and processing to make this path smaller requires a manufacturing cost. Rise, and restrictions on the thickness and flexibility of the material. Although the number of folds can be reduced by the above method, the effect cannot be said to be sufficient due to variations in roll dimensions. ,
Although the method of (1) and (2) secures the light shielding property by blocking the light path, the increase in the number of components causes an increase in the manufacturing cost. Also, when using a shrink material, the method of shading the end face with the shrink material must provide a larger shrinkage rate and a function of rigidity that does not fall down when rewinding in a magazine, and the selection of the shrink material. The method of using a flange larger than the roll diameter has a limitation on the loadability to the magazine, etc., and the drawer side edge that is heat-shrinked without being split is pulled out of the magazine slit, so pullout resistance is large. There are also problems.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has assured light-shielding performance of a roll-shaped photosensitive material package without increasing manufacturing costs or restricting material selection. Its purpose is to

[0007]

The object of the present invention is to provide a roll having a long photosensitive material wound thereon, a roll peripheral light-shielding member covering the outer surface of the roll, and a roll end light-shielding member, A heat-shrinkable light-shielding tape material applied to a side edge portion of the roll peripheral surface light-shielding member is wrapped around the roll end surface light-shielding member by heat shrinkage, and the roll-shaped photosensitive material package in which the end surface peripheral portion is sealed is long. A roll around which the photosensitive material is wound, having a roll peripheral surface light-shielding member and a roll end surface light-shielding member covering the outer surface of the roll, provided on a side edge of the roll peripheral surface light-shielding member,
A heat-shrinkable tape material having perforations and covered with the light-shielding member, is wound around the roll end surface light-shielding member by heat shrinkage, and a roll-shaped photosensitive material package in which the end surface periphery is sealed, In the above, the portion of the tape material hung over the roll end surface light-shielding member is adhered to the member, and the tape material is split by pulling out the roll peripheral surface light-shielding member. The fact that the roll end surface light shielding member has a convex shape toward the outside of the roll toward the center of the diameter, that the outer peripheral portion of the roll end surface light shielding member has a convex portion, Heating is achieved by being concentrated in the contraction.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail.

In the roll-shaped photosensitive material package of the present invention, a heat-shrinkable light-shielding tape material (tape made of a light-shielding shrink material) is applied to a side edge portion of the roll peripheral light-shielding member, and the tape material is heat-shrinkable. Thus, the peripheral edge of the end surface is sealed by being hung over the light-shielding member at the end surface of the roll. Thereby, in addition to the merit of using the shrink material, that is, the light shielding property is improved because no fold is formed, and the number of packaging parts can be reduced by eliminating the need for a folding mechanism.
Since the shrink material is formed into a tape shape and applied to the side edge of the roll peripheral surface light-shielding member, 1) the roll end surface light-shielding member can be made approximately the same size as the roll end surface, and the loadability to the magazine is not impaired. 4) The shrinkage rate of the shrink material may be smaller than that in the case where the entire end face is covered, and the restriction on the material is reduced. 3) The function such as rigidity required for the end face member is not required, and the restriction on the material is reduced. And (3) an effect that pressure due to shrinkage of the shrink material is not applied to the entire peripheral surface.

FIG. 1 shows a roll-shaped photosensitive material package according to the present invention. FIG. 1A is a perspective view showing the overall appearance.
(B) is a sectional view of the end face. The photosensitive material 1 is wound around a core 2 made of cardboard or the like, and is shielded from light by a roll peripheral light shielding member 3, a roll end surface light shielding member 4, and a light shielding tape material 5.

In use, it is practically required that the light-shielding tape material be cleaved by pulling out the roll peripheral light-shielding member (so-called leader or a member separate from the leader) from the magazine. A slit or notch may be formed in the cleavage start portion, or a perforation may be provided, and the perforation may be covered with a light-shielding member that is cleaved by pulling. When a perforation is provided, a notch can be used in combination with the tape and the light shielding member.

As the shrink material, a thickness of 20 to 100
Films of polystyrene (PS), polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), and the like having a thickness of about μm are exemplified. It is necessary to thermally shrink in the circumferential direction of the roll, and a uniaxially stretched film is preferable, but a biaxially stretched film may be used. Except for the case where perforations are provided and covered with a light-shielding member, it is necessary to add carbon black or the like to impart light-shielding properties.

For example, it is preferable that the tape has a width of about 20 to 40 mm and a length corresponding to 1.1 to 1.5 turns of the roll. The perforations may be provided at the center in the width direction of the tape material, or a plurality of perforations may be provided in order to allow the alignment of the perimeter of the end face and the perforations. By setting the perforation pitch, the feeling at the time of tearing, that is, the substantial tearing force can be adjusted, and the pitch is preferably about 1 to 2 mm for the gap and about 2 to 4 mm for the slit.

The light-shielding member is preferably a film of, for example, PE or the like containing carbon black or the like and having a thickness of about 20 to 100 μm, which is configured to be easily cleaved by a means such as calcium carbonate. Width is 5 for example
It is attached to the center of a heat-shrinkable tape material with a thickness of about 15 mm, and the length is the same as that of the heat-shrinkable tape.
It is preferable that the length is equivalent to 1.5 turns. Further, it is preferable that the fine wrinkles be smoothed by crushing by heating and pressing.

FIG. 2 is an enlarged view of an example of a cross section in a state where the peripheral edge of the end face is sealed. In the figure, the roll end face light-shielding member 4 has a convex shape toward the outside of the roll toward the center of the diameter, and a heat-shrinkable light-shielding tape material 5 is wrapped around the roll end face light-shielding member 4 by heat shrinkage. This is advantageous for close contact.

FIG. 3 is an enlarged view showing an example of a cross section in a state in which the peripheral edge of the end face according to the second aspect is sealed. The perforation 7 provided on the side edge of the roll peripheral light-shielding member 3 is shown. The heat-shrinkable tape member 5 having the perforations covered with the light-shielding member 8 is wound around the roll end surface light-shielding member 4 by heat shrinkage. The roll end surface light-shielding member 4 has a convex portion 9 on the outer peripheral portion. This is because the adhesive 6 comes into contact with the roll end surface light-shield member 4 during the contraction of the heat-shrinkable tape material 5, and the shrinkage of that portion is hindered. This has the effect of preventing that. The heat-shrinkable tape material 5 is adhered by pressing against the roll end surface light-shielding member 4 after shrinking.

Any light-shielding member can be adopted as long as the roll peripheral light-shielding member has a light-shielding property and has a strength to tear the applied heat-shrinkable tape material. For example, thickness 25μ
A film material having a width approximately the same as the width of the photosensitive material, in which a PET film having a thickness of m and a carbon black-dispersed PE film having a thickness of 60 μm is laminated, can be used. When the width tolerance of the light blocking member on the roll peripheral surface is on the minus side of the width of the photosensitive material, it works advantageously for adhesion of the heat-shrinkable tape material to the roll end surface, and conversely, when the tolerance is on the plus side. This has the same effect as the convex portion on the outer peripheral portion of the roll end surface light shielding member. The length of the roll peripheral surface light-shielding member is 0.5 to 1.1 revolutions before the heat-shrinkable tape material is applied, and the tape material is further wrapped and further extended to 20 to 40 cm.
The total length has the length that can be wound around. The roll peripheral surface light shielding member is joined to the outer peripheral end of the photosensitive material. When the photosensitive material has been wound, the outer peripheral edge of the light shielding member is fixed with an adhesive tape or the like so as not to be loosened.

The roll end face light-shielding member is made of resin or paper mixed with carbon black or the like, or a laminate thereof, and is formed of, for example, polystyrene resin, and has an inclined surface, irregularities, and the like as necessary. The thickness is preferably about 0.2 to 0.5 mm, and the outer diameter is substantially the same as the roll diameter. When the outer diameter tolerance is on the minus side of the roll diameter, there is an advantage that there is no danger of tearing the tape material when placed on a table or the like. Conversely, when the tolerance is on the plus side, the safety factor of the light shielding property is reduced. Each has the advantage of being improved.

The shape of the light-shielding member at the roll end surface may be a donut-shaped disk. However, a light-shielding member provided with a cylindrical portion and inserted into the core can easily secure light-shielding properties. The cylindrical portion may be bonded inside the core.

FIG. 4 shows a conceptual diagram of one example of a manufacturing process of the roll-shaped photosensitive material package of the present invention. A roll having a roll end surface light-shielding member 4 inserted into a core 2 of a roll around which the photosensitive material 1 is wound, and a heat-shrinkable light-shielding tape material (shrink material) 5 provided on a side edge of the outer periphery of the photosensitive material. The peripheral surface light-shielding member 3 is joined, cut into a required size, and wound, and the tape material 5 is wrapped around the roll end-surface light-shielding member 4 by heat shrinkage, thereby sealing the peripheral edge of the end surface.

The shrink material is bonded to the light-shielding member on the roll peripheral surface in advance, or is bonded while being wound. After the heat shrinkage, the portion wrapped around the roll end surface light-shielding member is bonded. As the type of the adhesive, any of a heat-sensitive (melting) type, a pressure-sensitive type, a solvent volatilization type, and a chemical reaction type can be used. The bonding may be performed by ultrasonic welding without using an adhesive.

When a pressure-sensitive adhesive is used, the central portion in the width direction of the shrink material may come into contact with the photosensitive material. Therefore, it is preferable that the shrink material is not applied to the portion in advance or has been treated so as not to adhere thereto. However, when a perforation and a light-shielding member are combined, it is preferable that the perforation is applied to the entire surface and used for bonding to the light-shielding member. After heat shrinkage, press and bond. In the case of the pressure-sensitive adhesive, the portion in contact with the light-shielding member at the roll end surface during shrinkage of the shrink material is difficult to further shrink, and there is a possibility that a light path may be generated due to uneven shrinkage, as shown in FIG. It is also possible to provide a convex portion on the roll end surface light-shielding member, but the same effect can be obtained by heat bonding using a heat-sensitive adhesive.

When a hot-melt adhesive is used as the heat-sensitive adhesive, an adhesive layer may be provided on the light-shielding member on the roll peripheral surface or on the roll end surface. A sealant layer may be provided on the tape material and heat-sealed. Since there is a possibility that the central portion in the width direction of the shrink material may come into contact with the photosensitive material, it is preferable to prevent the central portion from being bonded without heating. In the case where the shrink material is heat-sealed to the roll peripheral light-shielding member, it is preferable that the roll peripheral light-shield member is fixed so as not to contract, and the fixing is loosened after the temperature is lowered or cooled.

As a heating method for heat shrinkage of the shrink material, it is common to pass the photosensitive material roll through a high-temperature air atmosphere such as a shrink tunnel, but the pressure at which the shrink material shrinks is not applied to the entire peripheral surface. As described above, in order to suppress the influence of heat on the performance of the photosensitive material, it is preferable to locally heat only the portion where the material is contracted. In particular,
Methods such as inserting only the roll end surface into a box in a high-temperature air atmosphere, directly blowing high-temperature air, contacting a heat plate, and heating by radiant heat can be adopted.

[0025]

According to the present invention, light-shielding packaging of a roll-shaped photosensitive material can be performed without increasing the production cost or restricting the material selection.

[Brief description of the drawings]

FIG. 1 is a diagram showing a roll-shaped photosensitive material package according to the present invention.

FIG. 2 is an enlarged view of an example of a cross section in a state where an end face peripheral edge portion is sealed.

FIG. 3 is an enlarged view of an example of a cross section in a state where an end face peripheral edge portion according to claim 3 is sealed.

FIG. 4 is a conceptual diagram of one example of a manufacturing process of the roll-shaped photosensitive material package of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 photosensitive material 2 core 3 roll peripheral surface light shielding member 4 roll end surface light shielding member 5 tape material 6 adhesive 7 perforation 8 light shielding member 9 outer peripheral convex portion of roll end surface light shielding member 10 cutter

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) B65D 81/30 B65D 81/30 C 85/675 85/675

Claims (7)

[Claims] 1. A roll on which a long photosensitive material is wound, a roll peripheral light-shielding member and a roll end surface light-shielding member that cover the outer surface of the roll, and are provided on side edges of the roll peripheral light-shielding member. The heat-shrinkable light-shielding tape material thus obtained is wrapped around the roll end-surface light-shielding member by heat shrinkage, and the peripheral edge of the end surface is sealed. 2. A roll around which a long photosensitive material is wound, and a roll peripheral light-shielding member and a roll end surface light-shielding member which cover the outer surface of the roll, and are provided on side edges of the roll peripheral light-shielding member. The heat-shrinkable tape material having the perforations and the perforations covered with the light-shielding member is wrapped around the roll end-surface light-shielding member by heat shrinkage, and the peripheral surface of the end surface is sealed. Rolled photosensitive material package. 3. The tape material according to claim 1, wherein a portion of the tape material hung over the roll end surface light-shielding member is adhered to the member, and the tape material is cleaved by pulling out the roll peripheral surface light-shielding member. 3. The roll-shaped photosensitive material package according to item 2. 4. The roll-shaped photosensitive material package according to claim 3, wherein the bonding is performed after heat shrinkage of the tape material. 5. The roll-shaped photosensitive material package according to claim 1, wherein the roll end face light-shielding member has a convex shape toward the outside of the roll toward the center of the diameter. 6. The roll-shaped photosensitive material package according to claim 1, wherein an outer peripheral portion of the roll end face light shielding member is formed as a convex portion. 7. The heating for heat shrinkage of the tape material,
3. The method according to claim 1, wherein the step is performed intensively on the contraction part.
7. The roll-shaped photosensitive material package according to 2, 3, 4, 5, or 6.