JP2000181017A - Light-shielding rolled photosensitive material packed body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a low-cost light-shielding rolled photosensitive material packed body, less liable to cause failures in light shielding due to damages such as the cutting of a light shielding leader, horizontal dislocation and the separation of light shielding members other than the light-shielding leader. SOLUTION: A light-shielding leader 4 consists of an inner leader part 41 and an outer leader part 42. The width of the inner leader part 41 is larger than that of a long-length photosensitive material 3 and the part 41 has a length, which is larger than the interval between the inner walls of the outer peripheral parts of light-shielding flanges 2 and smaller than the interval between the outer edges of the peripheral parts of the flanges 2. The width of the outer leader part 42 is larger than that of the inner leader part 41, the length of the part 41 in the winding direction is larger than the peripheral length of the rolled photosensitive material 3, and the length of the outer leader part 42 in the winding direction is larger than the peripheral length of the light- shielding flanges 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll-shaped light-shielding material for light-sensitive material, and more particularly, to winding a long photographic paper or a photosensitive film into a roll on a core bar having light-shielding flanges provided at both ends, and forming a roll on the outer periphery thereof. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll-shaped light-sensitive material light-shielding package for charging a light room, which is formed by winding a light-shielding leader attached to the end of a long photosensitive material.

[0002]

2. Description of the Related Art Conventionally, a long photographic paper or the like is wound around a core bar having light-shielding flanges at both ends, and a light-shielding reader attached to the end of a long photosensitive material is wound around the outer periphery thereof. Japanese Patent Application Laid-Open No. 8-62783 and Japanese Utility Model Application Laid-Open No. 4-85438 disclose a packaging form in which a light-shielding leader wider than the width of the roll-shaped photosensitive material and the width between the light-shielding flanges is used.

[0003]

However, in the packaging form of Japanese Patent Application Laid-Open No. 8-62783, the light-shielding leader covering the light-shielding flange may be damaged due to vibrations during transportation or the like, breakage of the leader caused by falling, pinholes or the like. There is a danger of light entering the package. In addition, 4-85
No. 438, various forms shown in FIGS. 2 and 7 to 10 are devised. However, when an external force is applied, the light-shielding flange is separated or separated from the core of the roll-shaped photosensitive material. If the light-shielding reader is shifted in the horizontal direction, there is a risk that light may enter the inside of the package.

Further, in the embodiment of Japanese Patent Application Laid-Open No. 8-62783, the light-shielding reader is required to be composed of members having different elastic moduli in terms of the light-shielding function in order to cover the light-shielding leader around the light-shielding flange.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a roll-shaped light-sensitive material light-shielding package for a bright room, in which a light-shielding leader is cut or a pinhole is damaged. An object of the present invention is to provide an inexpensive roll-shaped photosensitive material light-shielding package, in which a light-shielding failure due to a horizontal displacement or a light-shielding member other than the light-shielding leader is hardly caused.

[0006]

According to the present invention, there is provided a roll-shaped light-shielding material for light-sensitive material according to the present invention, wherein a long light-sensitive material is wound in a roll around a core having light-shielding flanges attached to both ends. In a roll-shaped light-sensitive material light-shielding package packaged by winding a light-shielding leader connected to the end of a scale photosensitive material around its outer periphery, the light-shielding leader is constituted by an inner leader part and a subsequent outer leader part; The width of the leader portion is greater than the width of the long photosensitive material, and has a length equal to or greater than the distance between the inner walls of the outer peripheral portion of the light-shielding flange and equal to or less than the distance between the outer edges of the outer peripheral portion of the light-shielding flange. The width of the leader portion is larger than the width of the inner leader portion, and the length of the inner leader portion in the winding direction is at least wound in a roll shape. It has an outer peripheral length of at least said elongate photosensitive material, the winding direction of the length of the outer leader portion is characterized in that at least the outer periphery over the length of the light-shielding flange.

In this case, when the width of the long photosensitive material is W, the width of the inner leader portion is W + 2X, and the width of the outer leader portion is W + 2Y, it is desirable to satisfy the relationship of Y> 3X.

[0008] It is desirable that the side edge of the transition from the inner leader portion to the outer leader portion be tapered.

In this case, it is desirable that the length of the tapered side edge in the winding direction be at least １ ／ of the outer circumference of the long photosensitive material wound in a roll shape.

In the present invention, the light-shielding leader is constituted by an inner leader portion and a subsequent outer leader portion, the width of the inner leader portion is larger than the width of the long photosensitive material, and the width between the inner walls of the outer peripheral portion of the light-shielding flange. It has a length not less than the distance and not more than the distance between the outer edges of the outer peripheral portion of the light-shielding flange, the width of the outer leader portion is larger than the width of the inner leader portion, and the length of the inner leader portion in the winding direction is
The length of the long photosensitive material is at least as long as the outer periphery of the long photosensitive material wound in a roll shape, and the length of the outer leader portion in the winding direction is at least as long as the outer periphery of the light-shielding flange. When the light-shielding leader is wrapped around the outer periphery of the light-shielding flange, the side edge of the inner leader part adheres to the inner wall of the light-shielding flange or adheres to the outer periphery of the light-shielding flange to prevent external light from reaching the roll-shaped photosensitive material. Is done. In addition, the wider outer leader portion following the inner leader portion extends beyond the outer periphery of the light-shielding flange to the outer wall of the light-shielding flange to cover the entire area and further shield light, so that the light-shielding structure is doubled. The light shielding function is enhanced. Furthermore, even if the outer leader portion, which reaches the outer wall of the light-shielding flange beyond the outer peripheral portion of the light-shielding flange and is covered by the vibration or dropping due to transportation or the like, is damaged by the vibration or dropping during transportation, it adheres to the inner wall of the light-shielding flange or adheres to the outer periphery of the light-shielding flange. Since the inner leader portion that is in close contact with the vehicle remains, external light is prevented from entering, and the light blocking function is not impaired.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a roll-shaped light-sensitive material light-shielding package of the present invention will be described in detail based on examples. In the present invention, the light-shielding reader is made of a single material, and the light-shielding reader has two light-shielding functions. Such a light-shielding function is realized in the shape of the light-shielding reader. That is, the inner leader portion of the light-shielding leader has a shape in which the side edge is in close contact with the inner wall of the light-shielding flange or is in close contact with the outer periphery of the light-shielding flange, and the outer leader portion extends beyond the outer peripheral portion of the light-shielding flange. It has a double light-shielding function by being formed into a shape that reaches to cover. In addition, by forming such a light-shielding leader from a single material, the manufacturing method of the light-shielding leader is easy and the cost can be reduced.

FIG. 1 shows a perspective view (a) of a light-shielding package of a roll-shaped photosensitive material which has been completely packaged according to the present invention, and a perspective view (b) before a light-shielding leader is wound around the roll-shaped photosensitive material. As shown in FIG. 1B, a strip-shaped long photosensitive material 3 such as photographic paper or photosensitive film has light-shielding flanges 2 and 2 at both ends.
Is wound around a core 1 made of paper or the like in the form of a hollow pipe having a core attached thereto as a core rod to perform packaging, transportation, etc., while protecting the periphery of the wound roll-shaped photosensitive material 3;
In order to shield light, a light-shielding reader 4 made of plastic, paper or the like according to the present invention is connected to the end of the long photosensitive material 3 by an adhesive tape 5 or ultrasonic bonding. The long photosensitive material 3 is wound around the winding core 1 between the light-shielding flanges 2 and 2, and subsequently, a light-shielding reader 4 connected to the end thereof is wound around the outer periphery of the roll-shaped photosensitive material 3, as shown in FIG. As described above, by stopping the end portion of the light-shielding reader 4 with the adhesive tape 6 or the like, the roll-shaped photosensitive material 3 is shielded from external light or the like, and the package 10 according to the present invention is completed.

Here, the light-shielding reader 4 has an inner leader portion 41 in which the width of the end of the long photosensitive material 3 is relatively narrow.
And an outer leader portion 4 having a relatively large width on the opposite side.
2 are formed in an integrated shape, and as described above, are formed of a single material such as a light-shielding plastic film or paper. The width of the inner leader portion 41 is slightly wider than the width of the roll-shaped photosensitive material 3, and the length in the winding direction is at least as long as the outer circumference of the long photosensitive material 3 wound in a roll shape. In addition, the width of the outer leader portion 42 is configured to be wider than the width of the portion 41, and the length in the winding direction is at least as long as the outer circumference of the light-shielding flange 2.

Since the light-shielding reader 4 attached to the end of the long photosensitive material 3 has such a structure, the long photosensitive material 3
When the light-shielding leader 4 is wound around the core 1 after winding the same around the core 1, as shown in a cross-sectional view near the outer peripheral portion of the two types of light-shielding flanges 2 in FIG. This prevents external light from reaching the roll-shaped photosensitive material 3 in close contact with the inner wall. The wider portion 42 following the portion 41 reaches the outer peripheral portion of the light-shielding flange 2 and rides thereon to cover the entire portion to further shield the light. Thus, the light shielding structure is doubled, and the light shielding function is enhanced. Furthermore, even if the portion 42 covering the outer periphery of the light-shielding flange 2 is damaged by vibration or dropping during transportation or the like, the portion 41 that is in close contact with the inner wall of the light-shielding flange 2 remains. Is prevented, and the light blocking function is not impaired.

The inner wall near the outer peripheral portion of the light-shielding flange 2 is sectioned so that the distance between the inner walls of the light-shielding flanges 2 on both sides is increased toward the outer peripheral portion as shown in FIG. Is desirably tapered.

By the way, in the present invention, the width of the inner leader portion 41 of the light-shielding reader 4 is not limited to the width substantially equal to the distance between the inner walls of the outer peripheral portions of the light-shielding flanges 2 and 2 as described above. a) As shown in FIG.
The width may be a distance substantially equal to the distance between the outer edges of the outer peripheral portion of the second. In the case where the width of the portion 41 is a width substantially equal to the distance between the outer edges of the outer peripheral portions of the light shielding flanges 2 and 2, FIG.
As shown in (a), the side edge of the inner leader portion 41 is wider than the outer leader portion 42,
To form a first light-shielding portion, and the outer leader portion 42 wound around the outer portion covers the entirety, and its side edge is in close contact with the outer wall of the light-shielding flange 2 so as to form the first light-shielding portion.
, The light shielding structure is doubled, and the light shielding function is further enhanced.

If the width of the inner leader portion 41 is equal to the width of the outer leader portion 42 and is larger than the distance between the outer edges of the outer peripheral portions of the light-shielding flanges 2, 2, FIG.
As shown in (1), only one light shielding portion is formed, and the light shielding structure is insufficient. When the width of the inner leader portion 41 is larger than the distance between the outer edges of the outer peripheral portions of the light shielding flanges 2 and 2, as shown in FIG.
1, the side edge of the outer leader portion 42 tends to be along the inner surface of the outer leader portion 42, and the side edge of the inner leader portion 41 tends to separate from the outer wall of the light-shielding flange 2. Similarly, the light-shielding structure is insufficient.

FIG. 4 illustrates the positional relationship between the light-shielding flange 2 and the vicinity of the side edges of the inner leader portion 41 and the outer leader portion 42 other than those shown in FIGS. 2 and 3A. Although a detailed description is omitted, it will be apparent from the above description that a double light shielding structure is formed in these cases as well.

Next, as shown in FIG. 5 (a), the shape of the light-shielding reader 4 is such that the inner leader 41 and the outer leader 42 are both rectangular, Any of a shape having a step at the connecting portion and a shape having a taper at the boundary between the two, the connecting portion to the long photosensitive material 3 and the end of the portion 42 as shown in FIG. In the case of the light-shielding reader 4 having the shape shown in FIG. 3B, when applying tension and winding, it is possible to reduce the concentration of stress on the step, so that high-speed winding becomes possible.
This is a more desirable shape.

In the light-shielding reader 4 having the shape shown in FIG. 5, if the width of the roll-shaped photosensitive material 3 covering the periphery is W, the width of the inner leader 41 is W + 2X, and the width of the outer leader 42 is W + 2Y, W + 2X is equal to or greater than the distance between the inner walls of the outer peripheral portions of the light-shielding flanges 2 and 2 and is equal to or less than the distance between the outer edges of the outer peripheral portions of the light-shielding flanges 2 and 2, and the value of Y is set so as to satisfy Y> 3X. This is desirable for the light shielding function. The width W + 2 of the outer leader portion 42
It is desirable that Y has a width equal to or greater than the distance between the outer edges of the outer peripheral portions of the light-shielding flanges 2 and 2 plus 2 mm.

As described above, the length L1 of the inner leader portion 41 in the winding direction is at least as long as the outer periphery of the long photosensitive material 3 wound in a roll shape. Length L2 in the winding direction
Needs to have at least a length equal to or greater than the outer circumference of the light-shielding flange 2, and as shown in FIG.
In the case of a shape in which a tapered portion is provided at a transition from the portion 41 to the portion 42, the length excluding the tapered portion is at least as long as the outer periphery of the long photosensitive material 3 wound in a roll shape, It is desirable to have at least the length of the outer periphery of the light-shielding flange 2 or more.

In the case of the shape shown in FIG. 5B, it is desirable that the length Z of the tapered portion in the winding direction is at least １ ／ of the outer circumference of the roll-shaped photosensitive material 3. The tapered portion can form a three-dimensional curved path of light when wound on the roll-shaped photosensitive material 3, and is excellent in light-shielding properties.

The light-shielding reader 4 is shown in FIG.
Even if it is constituted by a single member as shown in FIG.
As shown in FIG. 5B, another light-shielding leader material 44, 44 having a shape as shown in the figure is adhered to both sides of a light-shielding leader material 43 having substantially the same width as the long photosensitive material 3, and as a whole, FIG. ,
You may make it become the same shape as (b).

The material of the light-shielding reader 4 is P
It can be formed by a single layer structure of E (polyethylene), PET, etc., a multilayer structure by co-extrusion, a composite member by bonding, and the like.

The shape of the outer periphery of the light-shielding flange 2 for shielding the side surface may be any of the forms shown in FIGS. 2 and 4, and is excellent because there is no advantage regarding the light-shielding function. However, as shown in FIG. 2A, the outer periphery of the light-shielding flange 2 is chamfered so that the light-shielding leader 4 (42) does not protrude from the outer surface of the flange. , Rubbing and curling can be prevented.

The light-shielding flange 2 is desirably made of polystyrene, polypropylene, polyethylene, polycarbonate, polyacetal, ABS resin or the like. In order to have a light-shielding function, carbon black must be contained from the viewpoint of light-shielding properties and cost. Is desirable. Carbon black is contained by a master batch method, a compound method, or the like. Specifically, the carbon black content is 1.0 to 15% by weight or more, more preferably 2.0 to 10% by weight or more, and more preferably 3 to 7% by weight per 1 mm of the thickness of the light shielding flange 2. . The thickness of the light-shielding flange 2 is preferably 0.7 to 4 mm, more preferably 1.0 to 3.0 from the viewpoint of the light-shielding function and the stability of the molding dimensions and molding conditions.
5 mm, even more preferably 1.5 to 3 mm.
The outer diameter of the outermost periphery of the light-shielding flange 2 may be larger or smaller than the outer diameter of the roll-shaped photosensitive material 3. The resin light-shielding flange 2 is manufactured by injection molding, blow molding, or the like.

Core 1 on which roll-shaped photosensitive material 3 is wound
The paper tube is not particularly limited, such as a paper tube and a resin core, but a paper tube is desirable from the viewpoint of disposability. The paper tube may have one layer or two or more layers, and the thickness of the paper tube is preferably 1.5 to 10 mm and 2 mm or more from the viewpoint of moisture resistance.

The light-shielding reader 4 and the long photosensitive material 3 can be joined by an adhesive tape, ultrasonic joining, or the like. The terminal stop of the light-shielding leader 4 can be performed by an adhesive tape, ultrasonic welding, or the like. In particular, when ultrasonic welding is used, the interlayer adhesion strength of the light-shielding leader 4 is made appropriate, and
The transverse vibration mode is desirable in order to reduce physical damage to the long photosensitive material 3.

Hereinafter, one specific embodiment will be described. The core 1 around which the roll-shaped photosensitive material 3 is wound is a paper tube.
A four-layer structure having a thickness of 2.0 mm was used.

The light-shielding flange 2 uses Mitsubishi Chemical Co., Ltd. Dialex HT-65 as a polystyrene resin.
Manufactured by injection molding. The thickness of the light-shielding flange 2 is 3 mm at the thickest point and 1 mm at the thinnest point. To give a light-shielding function, a compound of 40% by weight of carbon black / Dialex HT-65 is made and blended with the Dialex HT-65. 0.5 total
It was molded so as to be in weight%. The outermost diameter of the light-shielding flange 2 was +1 mm with respect to the outer diameter of the roll-shaped photosensitive material 3. The outer peripheral shape of the light-shielding flange 2 was the form shown in FIG.

The light-shielding reader 4 was prepared by blending 70.0% by weight of Ultrazex UZ-2021L, 30.0% by weight of Hizex HZ-3300F, and 7.5% by weight of carbon black TET-0199 by Mitsui Chemicals, Inc. A layered structure having a thickness of 0.1 mm was used. The light-shielding reader 4 having the form shown in FIG. 5B is used. The portion 41 covers the outer circumference of the roll-shaped photosensitive material 3 for 1.0 circumference and the outer circumference of the roll-shaped photosensitive material 3 for 1.2 circumferences. Wrap so that part 42 covers. The X and Y values in FIG.
X was set. The length Z of the tapered portion was set to １ ／ of the outer circumference of the roll-shaped photosensitive material 3.

The light-shielding reader 4 and the photosensitive material 3 were overlapped and joined to the ends of the light-shielding reader 4 and the roll-shaped photosensitive material 3. The terminal portion of the light-shielding reader 4 was bonded to the outer peripheral portion of the roll with an adhesive tape 6.

Although the roll-shaped light-shielding material of the present invention has been described based on the embodiments, the present invention is not limited to these embodiments, and various modifications can be made.

[0034]

As is apparent from the above description, according to the rolled photosensitive material light-shielding package of the present invention, the light-shielding leader is constituted by the inner leader part and the subsequent outer leader part, and the width of the inner leader part is reduced. It has a length greater than the width of the long photosensitive material, not less than the distance between the inner walls of the outer peripheral portion of the light-shielding flange, and not more than the distance between the outer edges of the outer peripheral portion of the light-shielding flange. It is larger than the width, and the length of the inner leader portion in the winding direction is at least as long as the outer periphery of the long photosensitive material wound in a roll shape, and the length of the outer leader portion in the winding direction is at least. Since the light-shielding flange has a length equal to or greater than the outer circumference of the light-shielding flange, when the light-shielding leader is wound around the outer periphery after the long photosensitive material is wound, the side edge of the inner leader portion is light-shielded. The external light reaches is prevented roll photosensitive material in close contact ride on the outer periphery of either the light-shielding flange in close contact with the inner wall of the flange. In addition, the wider outer leader portion following the inner leader portion extends beyond the outer periphery of the light-shielding flange to the outer wall of the light-shielding flange to cover the entire area and further shield light, so that the light-shielding structure is doubled. The light shielding function is enhanced. Furthermore, even if the outer leader portion, which reaches the outer wall of the light-shielding flange beyond the outer peripheral portion of the light-shielding flange and is covered by the vibration or dropping due to transportation or the like, is damaged by the vibration or dropping during transportation, it adheres to the inner wall of the light-shielding flange or adheres to the outer periphery of the light-shielding flange. Since the inner leader portion that is in close contact with the vehicle remains, external light is prevented from entering, and the light blocking function is not impaired.

[Brief description of the drawings]

FIG. 1 is a perspective view of a roll-shaped light-sensitive material light-shielding package after packaging according to the present invention and a perspective view before a light-shielding leader is wound around a roll-shaped photosensitive material.

FIG. 2 is a cross-sectional view of the vicinity of an outer periphery of a light-shielding flange for explaining a light-shielding function of the present invention.

FIG. 3 is a view similar to FIG. 2 for explaining a light blocking function when the width of an inner leader portion is wider;

FIG. 4 is a view similar to FIG. 2 showing another example possible with the present invention.

FIG. 5 is a diagram illustrating an example of a shape of a light-shielding reader according to the present invention.

FIG. 6 is a diagram for explaining an example in which the light-shielding reader according to the present invention is configured by a plurality of members.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Core 2 ... Light shielding flange 3 ... Long photosensitive material (rolled photosensitive material) 4 ... Light shielding leader 5 ... Adhesive tape 6 ... Adhesive tape 10 ... Package 41 ... Inner leader part of light shielding leader 42 ... Outside of light shielding leader Leader part 43: light shielding leader material 44: another light shielding leader material

Claims (4)

[Claims] 1. A long light-sensitive material is wound in a roll around a core having light-shielding flanges attached to both ends, and a light-shielding reader connected to an end of the long light-sensitive material is wound around the outer periphery thereof. In the roll-shaped light-sensitive material light-shielding package, the light-shielding leader is constituted by an inner leader portion and a subsequent outer leader portion, wherein the width of the inner leader portion is larger than the width of the long photosensitive material, and the outer periphery of the light-shielding flange is formed. Having a length equal to or greater than the distance between the inner walls of the portion and equal to or less than the distance between the outer edges of the outer peripheral portion of the light-shielding flange, the width of the outer leader portion is greater than the width of the inner leader portion, and The length in the winding direction is at least as long as the outer periphery of the long photosensitive material wound in a roll shape, and the outer leader portion is wound. The length in the direction is at least as long as the outer periphery of the light-shielding flange. 2. When the width of the long photosensitive material is W, the width of the inner leader portion is W + 2X, and the width of the outer leader portion is W + 2Y, the relationship of Y> 3X is satisfied. 2. The light-shielding package for roll-shaped photosensitive material according to 1. 3. The roll-shaped light-sensitive material light-shielding package according to claim 1, wherein a side edge of a portion transitioning from the inner leader portion to the outer leader portion is tapered. 4. The length of the tapered side edge in the winding direction is at least one-fourth of the outer circumference of the long photosensitive material wound in a roll shape. The light-shielding package of the roll-shaped photosensitive material according to the above.