JPH0682975A - Protective sheet for sheet-like photosensitive material - Google Patents

Abstract

PURPOSE:To obtain a protective sheet for a sheet-like photosensitive material, whose manufacture is easy and simultaneously can surely feed the sheet-like photosensitive material. CONSTITUTION:The protective sheet for the sheet-like photosensitive material 1 is constituted in such a manner that a gap between a substrate part 2 for placing the sheet-like photosensitive material A on a planar body and a lid part 5 is regulated, simultaneously, respective wall parts 3a-3c and 6a-6c preventing the sagging of the lid part 5 and notches 4a-4c and 7a-7c for restraining the substrate part 2 and the rear lid 5 are formed to fold/erect the substrate part 2, the rear part 5, etc., and the cuts 4a-4c and 7a-7c are engaged each other to load the sheet-like photosensitive material A. Therefore, the manufacture and carrying are easy and moreover, only the notches are engaged each other so that the protective sheet for the steel-like photosensitive material 1 is completed and assembling workability can be drastically improved. On the other hand, a sheet-like photosensitive material separating mechanism is provided to realize the sure feeding of the sheet-like photosensitive material at every one.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light-sensitive sheet-shaped light-sensitive material such as X-ray photographic film, CRT image recording image-forming material, laser recording image-forming material, lith film, cut film, photographic paper. The present invention relates to a protective sheet suitable for packaging a sheet-shaped photosensitive material such as a PS plate, a PS plate and a photosensitive resin film, and particularly an X-ray film, C
A sheet for easily loading the image forming material for RT image recording, the image forming material for laser recording, the lith film, etc. in a photographing device or an image recording device in a bright room and for surely delivering the same into the device. And a structure of a protective sheet for a photosensitive material.

[0002]

2. Description of the Related Art A sheet-shaped photosensitive material such as an X-ray photographic film is packaged with a protective material having a light-shielding and moisture-proof function in a state where a desired number of sheets are laminated. On the other hand, as a method of supplying the X-ray photographic film to the photographing apparatus, there is a method in which the X-ray photographic film stored in Magasin is sucked and taken out by a vacuum suction mechanism.

Therefore, conventionally, a protective sheet for a sheet-shaped photosensitive material such as that disclosed in Japanese Utility Model Publication No. 61-20591 has been used. To explain its outline, one side is the short side,
Load a large number of X-ray photographic films, etc. so that they are sandwiched between U-shaped papers (protective sheets) with the other side as the longer side,
Further, it is packaged in a bag made of a flexible material. Incidentally, Japanese Utility Model Laid-Open No. 55-164642 also discloses an addressing paper having a structure similar to that described above.

According to this structure, the long side of the backing paper can support the X-ray photographic film for preventing deformation, and a part of the X-ray photographic film is exposed from the short side, so that the suction mechanism is used. Can be taken out by suction.

[0005]

However, the above-mentioned backing paper is formed by folding a piece of cardboard in a U-shape, and when the folding is weak, the end of the short side is opened and lifted. This is an obstacle to opening and closing the magazine shutter of the device. On the other hand, in the case of strong folding, the short side portion hangs down, so that when two films are fed, one end of the return film is caught and the film cannot be returned smoothly.

In order to solve this problem, it is conceivable to further shorten the short side portion, but the protective function of the X-ray film is deteriorated. In addition, there is also one in which the frame portion is formed in a part of the periphery of the long side portion while removing the short side portion, but this is not preferable because the film protecting function is deteriorated.

The invention disclosed in Japanese Utility Model Laid-Open No. 54-43328 solves the above-mentioned problems, but the cardboard is formed in a box shape so that the ends do not hang down. Therefore, there is a problem that it takes time to set up space in the manufacturing process and that setup time is required. Further, US Pat. No. 5,048,685 discloses a structure in which the tape is fixed to the film without being formed in the assembly box. However, in this structure, the tape comes into contact with the film and Accidents such as desired adhesion tend to occur.

Further, in the light-room loading package, since the film cutting normally performed in a dark room cannot be performed, problems such as two-sheet feeding are likely to occur at the time of film feeding.

An object of the present invention is that, in addition to being easy to manufacture,
It is an object of the present invention to provide a protective sheet for a sheet-shaped photosensitive material, which is configured so as to reliably supply the sheet-shaped photosensitive material. Another object of the present invention is to provide a sheet-like protective sheet for a photosensitive material which does not cause light fog even on a photographic photosensitive material film using infrared semiconductor laser light.

[0010]

The above-mentioned object of the present invention is to provide a substrate portion on which a sheet-shaped photosensitive material is placed, and a small area for the substrate portion on one plate-like member, A lid portion that covers a part of the sheet-shaped photosensitive material, and a substrate wall portion that forms a wall portion on a desired periphery of the outer periphery of the substrate portion by assembly and that keeps a distance between the lid portion and the lid portion at a predetermined distance, And a lid wall portion provided at a position corresponding to the periphery of the substrate portion at the outer periphery of the lid portion at the time of assembly, and provided on both the substrate wall portion and the lid wall portion, and at the time of assembly. This is achieved by a protective sheet for a sheet-shaped photosensitive material (hereinafter, referred to as a protective sheet), which is provided with a notch that engages with the base portion and the lid portion.

Further, it is preferable to provide a sheet-shaped photosensitive material separating mechanism on at least the vicinity of the sheet-shaped photosensitive material feeding side end portion on the inner side surface of the substrate wall portion in contact with the sheet-shaped photosensitive material. Furthermore, the protective sheet preferably contains an infrared absorbing dye and / or an ultraviolet absorbing dye so as not to cause light fog even when a strong light source such as a laser beam or a highly sensitive sheet-shaped photosensitive material is used.

[0012]

According to the above-mentioned protective sheet, a three-dimensional protective sheet can be easily assembled by folding up the substrate portion and the lid portion, which are formed on a piece of cardboard, and each wall portion, and engaging the notches. . Then, the sheet-shaped photosensitive material can be easily loaded in the assembled protective sheet, and the lid portion is formed in a small area.
The sheet-shaped photosensitive material such as a line photographic film can be easily fed from the portion protruding from the lid portion. Further, the sheet-shaped photosensitive material separating mechanism provided on the wall portion of the substrate eliminates the need for a film cutting operation and prevents a trouble of feeding a plurality of sheets. Furthermore, even if a strong light source is used or a highly sensitive sheet-shaped photosensitive material is used, the occurrence of optical fog can be prevented.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. 1 is a perspective view showing a protective sheet, FIG. 2 is a developed view, FIG. 3 is a perspective view during an assembling process, and FIG. 4 is a sectional view of an essential part showing a meshing state. First, the overall configuration of the protective sheet 1 will be described. As a connecting member with a flat plate-shaped substrate portion 2, substrate wall portions 3a and 3b provided around the three sides of the substrate portion 2, and a lid portion 5 described later. Substrate wall portion 3c that also has an action, lid portion 5, and lid wall portions 6a and 6b
It is composed by. Then, notches 4a and 4b are formed at appropriate positions on the substrate walls 3a and 3b, and notches 7a and 7b are also formed on the lid walls 6a and 6b.

In order to prevent the central portion of the lid portion 5 from hanging down, the central portion of the lid portion 5 may be cut, and the lid portion 5 may be cut in an arc shape as shown by a chain double-dashed line 5a in the figure. preferable. Also, as another method for preventing the sagging, the lid 5
At least the open end of the above may be bent to form a double structure. Notch portions 8a and 8b formed at the end of the substrate portion 2
Is for detecting the zero sheet X-ray photographic film and may be formed in the opening instead of the notch.
It is also possible to provide an uneven portion on the top for detection. Also,
Between the substrate portion 2 and the lid portion 5, a large number of sheet-shaped X-ray photographic films (hereinafter referred to as X-ray photographic films) (not shown) are loaded.

The protective sheet 1 is a piece of thick paper, for example, a bleached kraft paper having a basis weight of 300 to 550 g / m ² , preferably about 400 to 450 g / m ² and punched as shown in FIG. It is constructed by assembling it, and so-called bikunuki is applied for die cutting, and the color may be white, black, or any other color. It should be noted that the case of black color has an advantage that safety is improved for loading in a bright room.
Further, the safety can be similarly improved by using a complementary color of the laser light to be recorded such as in the case of laser recording.

Specifically, the protective sheet contains an infrared absorbing dye and / or an ultraviolet absorbing dye. In particular, in an infrared semiconductor laser photographic film using a strong laser light source, it is preferable to mix and use an infrared absorbing dye and an ultraviolet absorbing dye in order to prevent light fog. As the infrared absorbing dye, Japanese Patent Publication No. 62-299959, Japanese Patent Publication No. 2-2074, and Japanese Patent Publication No. 4-95946.
Those disclosed in Japanese Patent Application Publication No. 3-62684 and the like can be used.

Further, as the ultraviolet absorbing dye, Japanese Patent Laid-Open No.
2-210458, JP-A-63-103235, JP-A-63-104046, JP-A-63-
Those disclosed in JP-A-306436 and JP-A-63-314535 can be used. Carbon black, an inorganic pigment, adsorbs sulfurous acid gas and moisture in the air and is a photographic property of sheet-like photosensitive materials (fogging, sensitivity, etc.).
It is not preferable because it adversely affects the It is necessary to change the content of the infrared absorbing dye and the ultraviolet absorbing dye in the protective sheet depending on the characteristics of the sheet-shaped light-sensitive material, but it is preferable to use a mixture as a mixture rather than a single use from the viewpoint of preventing light fog.

Regarding the dimensions of the substrate portion 2 and the like, the X to be loaded
Although it is set according to the size of the line photographic film, the width w of the substrate portion 2 and the lid portion 5 is 2 in this embodiment.
The depth d of the substrate portion 2 is set to 180 mm and the depth e of the lid portion 5 is set to 75 mm. The width h of each of the wall portions 3a to 3c, 6a, 6b defines the gap between the substrate portion 2 and the lid portion 5 at the time of assembly, in other words, the height, and is 20 mm in this embodiment. It is set.

Further, the notches 4a and 4b on the substrate side and the notches 7a and 7b on the lid side respectively are wall portions 3c.
Is formed at a position 55 mm from the end of the, and the cutting depth is set to 1/2 · h.

In this embodiment, the opposing wall portions 3 are
A sheet-shaped photosensitive material separating mechanism 9 is provided on a and 3b. This is pressed in a dotted line at the time of die removal so as to be formed on the inner side surfaces of the end portions on the delivery side of the substrate walls 3a and 3b during assembly, and has a small resistance when loading an X-ray photographic film. In addition, when feeding the X-ray photographic film, the cross-sectional shape is taken into consideration so as to separate the X-ray photographic films that are about to be fed out by rubbing the end portions of the X-ray photographic film while a plurality of them are being stacked. (Details will be described later)

Next, the method of assembling the protective sheet 1 will be described. An appropriate number of sheets are stacked in a die-cut sheet-like stage in the form shown in FIG. 2, dried at 50 ° C., taken out from the dry box, and then wrapped with a PP sheet. Bring it into the process. Assembly is
As shown in FIG. 3, the walls 3a to 3c, 6a and 6b are folded up, and then the cuts 4a and 4b on the substrate side are engaged with the cuts 7a and 7b on the lid side. After the notches 4a and 4b on the board portion side and the notches 7a and 7b on the lid portion engage with each other, the board wall portion 3b and the lid wall portion 6b intersect each other as shown in a partially enlarged view of FIG. ,
It prevents the board wall 3a and the lid wall 6a from opening, and also prevents the board 2 and the lid 5 from opening.

In order to improve the frictional force of the contact surfaces of the wall portions 3a, 6a and the wall portions 3b, 6b which mesh with each other, it is more preferable to add a treatment such as roughening the surfaces. As described above, the assembling work is performed by the respective wall portions 3a to 3c, 7a, 7
It is simply performed by folding up b and engaging the notches 4a, 4b, 7a, 7b, and no adhesive or tape is required. Then, in the assembled state as shown in FIG. 1, between the substrate portion 2 and the lid portion 5, for example, 10
Insert about 0 x-ray film (corner cut).

What should be noted in the above-mentioned assembling process is that the X-ray photographic film can be easily assembled into the protective sheet 1 from a sheet-like shape while accumulating 100 sheets each. Therefore, the space required for assembly can be reduced, and the working efficiency can be improved in combination with the effect that the adhesive is unnecessary. In addition, even when using an adhesive, it is possible to compensate for the lack of holding force until the adhesive has adhesiveness due to drying or heat, and the assembly shape is required before the adhesive solidifies. Can be prevented from collapsing.

Next, a second embodiment of the present invention will be described with reference to FIGS. The difference from the first embodiment is that one of the substrate wall portions is deleted and the lid portion 5 is formed in a drooping prevention shape. Therefore, the members having the same functions as those described above are designated by the same reference numerals and the description thereof will be omitted. In the protective sheet 1 shown in this embodiment, the substrate wall portion 3b and the lid wall portion 6b in the first embodiment are removed (FIG. 1).
reference). Therefore, one end of the lid portion 5 is no longer supported, and if it is left as it is, one end of the lid portion 5 hangs down, which hinders the return of the X-ray photographic film. Therefore, in the present embodiment, the corner portion of the lid portion 5 is removed so that the sagging does not occur. In the first embodiment, the lid wall portion 6a and the substrate wall portion 3a are assembled so that the wall portion 3c side of the lid wall portion 6a is on the outside, and the lid wall portion 6a is meshed on the inside. However, in this embodiment, the lid wall portion 6a on the side of the wall portion 3c is on the inside, and the lid wall portion 6a is assembled so that it is engaged and then placed on the outside.

According to the construction of this embodiment, only the walls 3a, 3c and 6a need to be folded, and the engaging operation can be performed only on the notch 4a on the substrate side and the notch 7a on the lid side. Therefore, the assembling work is further simplified and the working time can be shortened. Moreover, the amount of the paper material used as the protective sheet 1 can be reduced, and the cost can be reduced. The material and color of the paper material may be the same as in the first embodiment.

Next, a third embodiment of the present invention will be described with reference to FIGS. The main difference between this embodiment and each of the above-described embodiments is that the connection between the substrate portion 2 and the lid portion 5 is made up of the wall portion 3b.
It is configured to be performed using. That is, the lid 5 is formed so as to extend to the wall 3b, and the wall 3c
The notch 4c is formed in this. On the other hand, a wall 6c is formed on the lid 5, and a cut 7c for engaging with the cut 4c is formed.

In the protective sheet 1, the respective wall portions 3a to 3c, 6b and 6c are folded up in the same manner as described above from the unfolded form as shown in FIG. 7, and further the cutouts 4a and 4c on the substrate side are cut into the cutouts 7a on the lid side. Assemble by engaging 7c. As a result, the protective sheet 1 as shown in FIG. 8 is completed. In the assembled state, the notches 4a and 4 on the substrate side are formed.
c and the engagement of the notches 7a and 7c on the lid side prevents the substrate portion 2 and the lid portion 5 from opening, and also prevents the substrate side wall portions 3a and 3c and the lid side wall portions 6b and 6c from opening. Done. The X-ray photographic film is loaded between the substrate portion 2 and the lid portion 5. Since the three sides of the periphery of the substrate portion 2 and the lid portion 5 are supported by the respective wall portions at predetermined intervals. There is no fear that the lid 5 will hang down. Therefore, when the X-ray photographic film is pulled out, even if a situation occurs in which the X-ray photographic film is returned, the X-ray photographic film can be returned without being caught.

The material of the protective sheet 1 shown in this embodiment may be the same as that described above, and the same effects as described above such as easy assembly can be obtained.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. 9 and 10. The difference from the above embodiment is that the substrate side wall portion 3a and the lid side wall portion 6b of the third embodiment are deleted to simplify the structure (see FIG. 7). That is, the lid portion 5 is formed so as to extend to the wall portion 3b as in the third embodiment, and the wall portions 3a and 6b are deleted.
Assembling is performed from the form shown in FIG. 9 to the wall portions 3b, 3c, 6c.
Is folded up, and the notch 4c on the substrate side and the notch 7c on the lid side are engaged with each other.

As a result, the protective sheet 1 as shown in FIG. 10 is completed. Compared to the third embodiment, only one meshing is required, and the assembling work becomes easier. The end of the lid 5 may be cut off from the alternate long and two short dashes line 5b in FIGS. 9 and 10 in order to prevent the lid 5 from hanging down. According to this cutting structure, the same effect as that of the second embodiment can be obtained. Further, the material and color may be the same as those in the above embodiment.

The size of the protective sheet 1 is set according to the size of the X-ray photographic film as described above, and an example thereof has been described in the first embodiment. Therefore, the size of the protective sheet 1 in the third and fourth embodiments will be described below. That is, the width w of the substrate portion 2 is 355.
mm, the depth d is set to 431 mm, and the width f of the substrate wall portions 3a to 3c is set to 20.5 mm. The depth d of the lid 5 is set to 295 mm, and the width h of the lid walls 6b and 6c is set to about 19.5 mm in consideration of the plate thickness. The depth of the cuts 4c and 7c is set to 1/2 · f.

Next, a fifth embodiment of the present invention will be described with reference to FIGS. 11 and 12. The characteristic of this embodiment is that the substrate unit 2
Is set smaller than the size of the X-ray photographic film. Therefore, in the present embodiment, neither the substrate portion 2 nor the lid portion 5 has an area where the entire X-ray photographic film can be placed, and both have the function as the substrate portion 2 and the lid portion 5. For convenience of explanation, one side will be described as the substrate section 2 and the other will be described as the lid section 5.

As shown in a developed state in FIG. 11, the base plate portion 2 is divided into about half the base plate portion of the fourth embodiment along the longitudinal direction, and the wall portion 3c is extended to cover the lid portion. 5 is formed. Then, a cut 4b is formed in the substrate wall 3b, and a cut 7b is formed in the lid wall 6b. Further, as in the fourth embodiment, it may be cut from the two-dot chain lines 2a and 5b on the substrate portion 2 and the lid portion 5, and the same effect as that of the second embodiment is obtained.

To assemble, fold the walls 3b and 6b,
It is performed by engaging the notch 4b on the substrate side with the notch 7b on the lid side. As a result, the protective sheet 1 as shown in FIG. 12 is completed, and the X-ray photographic film can be loaded between the substrate portion 2 and the lid portion 5. The protective sheet 1 in this embodiment does not cover the entire side surface of the X-ray photographic film, neither the substrate portion 2 nor the lid portion 5. Therefore, the substrate unit 2 is compatible with X-ray photographic films and magazines.
12, the X-ray photographic film partly protrudes from the substrate portion 2 and can be supplied by the suction mechanism using the protruding portion. Further, the X-ray photographic film can be dispensed even when the substrate portion 2 is on the lower side and the lid portion 5 is on the upper side, as in the above-mentioned respective embodiments. The material of the protective sheet 1 may be the same as above.

Next, the package of the protective sheet 1 loaded with the sheet X-ray photographic film will be described with reference to FIG. The protective sheet 1 has a protective function for the X-ray photographic film, but does not have a light shielding function. Therefore, the protective sheet 1 loaded with the X-ray photographic film A cannot be conveyed as it is. Therefore, the protective sheet 1 loaded with the X-ray photographic film A is put in a flexible bag 11 having a light shielding function. Since the protective sheet 1 cannot be easily folded, the X-ray photographic film is not easily damaged during transportation, and the performance is not deteriorated due to undesired exposure.

Referring to FIG. 14, the sectional shape of the sheet-shaped photosensitive material separating mechanism will be described with respect to the protective sheet loaded with the sheet-shaped X-ray photographic film. A sheet-shaped photosensitive material separating mechanism 9 is provided at the inside of the wall portions 3a and 3b formed so as to face both end portions of the substrate portion 2 at the end portions on the feeding side. This is pressed in a dotted line at the time of die removal so as to be formed on the inner side surfaces of the substrate walls 3a and 3b during assembly, and has low resistance when the X-ray photographic film is loaded, and the X-ray photographic film supply is performed. The cross-sectional shape is taken into consideration so as to separate the X-ray photographic films, which are about to be sent out while rubbing the end portions of the X-ray photographic films at the time of output, while a plurality of sheets are being stacked.

FIG. 14A shows a protrusion 9a having a sawtooth cross section.
It is a sheet-shaped photosensitive material separating mechanism having a projection, and since the projection tips are directed downward, they can be easily inserted when loading an X-ray photographic film from above, and overlapped by a plurality of projections when feeding an X-ray photographic film. The plurality of X-ray photographic films thus prepared are separated and supplied one by one. FIG. 14B shows a sheet-shaped photosensitive material separating mechanism having a protrusion 9b having a semicircular cross section. Further, FIG. 14C shows a sheet-shaped photosensitive material separating mechanism in which a knitted fabric having a pile is attached to the wall portion 3a without being embossed.
You may stick or assemble plastic etc.

However, if a plurality of X-ray photographic films have a projection shape that can be easily moved upward while overlapping, a plurality of X-ray photographic films will be delivered while overlapping even if the end portions of the X-ray photographic films are rubbed during delivery. Since there is a possibility that the X-ray photographic film can be easily moved upward, a protrusion shape must be avoided.

That is, when an upward tension difference with and without the sheet-shaped photosensitive material separating mechanism is measured with a tension gauge, an average value of five times is 0.2 to 1
00 g, preferably 0.5 to 50 g, particularly preferably 1
If the amount is -30 g, it is possible to rub the end portions of the X-ray photographic film at the time of feeding and surely separate and feed the sheets one by one.

The height h ₁ of the above-mentioned protrusion is 0.1
It is 2.0 mm, preferably 0.2 to 1.5 mm, particularly preferably 0.3 to 1.0 mm.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above and various modifications can be made. For example, the protective sheet 1 shown in the fourth and fifth embodiments has one meshing position, but the number of cuts may be increased to enhance the locking effect. Further, the meshing shape may be transformed into an arc shape or a key shape. Further, the shape of the sheet-shaped photosensitive material separating mechanism may be a linear shape, a grid shape, or the like as long as the desired effect of separating the sheet-shaped photosensitive materials one by one can be obtained.

Next, an image recording apparatus and a sheet film loading apparatus including at least one of a film supply magazine for loading a package using the protective sheet according to the present invention or a mounting table for mounting the package will be described. The image recording apparatus according to the present invention includes a similar image recording apparatus as a representative example of the image recording apparatus as shown in FIG. 5 of Japanese Patent Application Laid-Open No. 64-42641 filed by the applicant of the present application. Further, the sheet film loading device includes a similar sheet film loading device as a representative example of the sheet film loading device shown in FIG. 6 of US Pat. No. 5,080,343. The film feeding mechanism is shown in FIGS. 1, 7 and 8 of the above-mentioned U.S. Pat. No. 5,080,343, and further in Japanese Patent Laid-Open No. 63-113444.
An image recording device or a sheet film loading device including the mechanism shown in Japanese Patent Publication is particularly preferable. The protective sheets used for the light-room loading package illustrated in these patents are the same as those described above, but it is difficult to open and close the shutter and the film mounting table when the folding is weak. In many cases, it is preferable to combine with the protective sheet of the present invention.

[0043]

As described above, the protective sheet according to the present invention includes a substrate portion and a lid portion on which a sheet-shaped photosensitive material is placed on one plate-shaped body, and further, the substrate portion and the lid portion. Each wall portion that defines the interval between them and that prevents the lid portion from hanging down, a notch that meshes the substrate portion and the lid portion, and the like are formed, and the substrate portion and the lid portion are folded up and the notch is formed. To form a three-dimensional protective sheet into which the sheet-shaped photosensitive material can be loaded.

Therefore, since it is a plate-shaped body that has been die-cut before being assembled into the protective sheet, it can be stacked and easily carried. Also, assembling, the die-cut substrate and lid are folded up and the cuts are bitten. Because it is completed just by matching,
Working efficiency can be greatly improved in combination with the ease of carrying. Moreover, assembling work can be performed according to the preparation of the sheet-shaped photosensitive material to be loaded, and the sheets can be sequentially loaded. Further, since the assembled protective sheet is engaged with the substrate portion and the lid portion by the engagement of the cuts, the lid portion can be smoothly attached to the magazine without accident such as opening of the lid portion. Further, since the lid portion is formed so as to cover a part of the sheet-shaped photosensitive material, the sheet-shaped photosensitive material can be dispensed at the position exposed from the lid portion, and the respective wall portions prevent the lid portion from hanging down. Therefore, the sheet-shaped photosensitive material can be returned smoothly. Further, by providing the sheet-shaped photosensitive material separating mechanism at the inner end of the wall portion, the stability of the sheet-shaped photosensitive material feeding can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a protective sheet showing a first embodiment of the present invention.

FIG. 2 is a development view of a protection sheet according to a first embodiment.

FIG. 3 is a perspective view showing an assembling process of the protective sheet of the first embodiment.

FIG. 4 is a sectional view of an essential part showing an engaged state of the protective sheet of the first embodiment.

FIG. 5 is a perspective view of a protective sheet showing a second embodiment of the present invention.

FIG. 6 is a development view of a protection sheet according to a second embodiment.

FIG. 7 is a development view of a protective sheet showing a third embodiment of the present invention.

FIG. 8 is a perspective view of a protection sheet according to a third embodiment.

FIG. 9 is a development view of a protective sheet showing a fourth embodiment of the present invention.

FIG. 10 is a perspective view of a protective sheet according to a fourth embodiment.

FIG. 11 is a development view of a protective sheet showing a fifth embodiment of the present invention.

FIG. 12 is a perspective view of a protection sheet according to a fifth embodiment.

FIG. 13 is a partially cutaway perspective view showing a protective sheet loaded with a sheet-shaped photosensitive material.

FIG. 14 is an enlarged cross-sectional view of a main part of a sheet-shaped photosensitive material separating mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Protective sheet 2 Substrate part 3a-3c Substrate wall part 4a-4c Notch 5 Lid part 6a-6c Lid wall part 7a-7c Notch 8a-8d Notch part 9 Sheet-like photosensitive material separating mechanism 11 Packaging bag A X-ray photographic film

Claims (3)

[Claims] 1. A substrate portion on which a sheet-shaped photosensitive material is placed, and a lid portion formed in a small area with respect to the substrate portion and covering a part of the sheet-shaped photosensitive material at the time of assembly. When,
A substrate wall portion that forms a wall portion in a desired periphery of the outer peripheral portion of the substrate portion by assembly and that maintains a gap with the lid portion at a predetermined interval, and the outer peripheral portion of the lid portion that is the substrate portion during assembly. A lid wall portion provided at a position corresponding to the periphery of the substrate wall portion, and is provided on both the substrate wall portion and the lid wall portion, and engages at the time of assembly to lock the substrate portion and the lid portion. A protective sheet for a sheet-shaped photosensitive material, which is provided with a cut. 2. The sheet-shaped photosensitive material separating mechanism is provided at least on the inner surface of the substrate wall portion in contact with the sheet-shaped photosensitive material, at least near the sheet-shaped photosensitive material feeding side end portion. A protective sheet for a sheet-shaped photosensitive material as described above. 3. The protective sheet for a sheet-shaped photosensitive material according to claim 1, wherein the protective sheet contains an ultraviolet absorbing dye and / or an infrared absorbing dye.