JPH0219798B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to microfilm, negative film,
The present invention relates to a jacket for strip film suitable for storing long strip films such as body film.

[Prior art]

Strip film jackets for storing and organizing long strip films such as microfilm, negative film, or positive film are roughly divided into two types. One type, as shown in FIG. 7, is one in which the interval W between the joint parts 12 extending adjacent to each other forming the storage part is significantly larger than the width of the strip film to be stored (hereinafter referred to as a loose type). There are two types: and one in which the interval W is slightly larger than the width of the strip film to be stored (hereinafter referred to as a closed type).

The loose type jacket is applicable to negative or positive films such as 35 m/m plates, and since the interval W is larger than the film width, it is difficult to insert the long strip film 10 into the storage section 6. is easy. However, the stored strip film tends to jump around in the storage compartment, making it difficult to hold it in place, and when the film insertion slot 8 faces downward, the strip film 10 easily falls out of the storage compartment 6, making it difficult to keep the jacket in place. I had to be very careful when carrying it. Further, as mentioned above, it is difficult to hold the film 10 in a fixed position, so it is impossible to attach the jacket to the projector and project. Furthermore, the known jacket has, around the stored strip film, a zone consisting of a front plate 2 and a back plate 4, and zones consisting of sprocket holes for winding the film located at both edges in the width direction of the film. Since there is a relatively large light-transmitting band, when the jacket is held up toward a light source, a large amount of light leaks from this light-transmitting band, making the image very difficult to see.

On the other hand, closed type jackets are mainly used for the purpose of projecting microfilm, so they must hold the microfilm in a fixed position. The difference between the distance W between the portions 12 and the film width is small. For this reason, strip film 1
When the insertion direction of the film 0 is slightly different from the extending direction of the storage part 6, the film corner part tends to get caught on the extending joint part 12 and is easily bent, making it difficult to insert the film by hand. There is a problem that is extremely difficult. This problem is particularly noticeable in the case of long endoscopic films whose width is extremely small compared to their length. For this reason, it is customary to use a special insertion aid for inserting the film, making the insertion work cumbersome. Also, like the loose type jacket, there was a problem in that the light leaking from the light-transmitting band made the image very difficult to see.

[Purpose of the invention]

The present invention has been made to advantageously solve the problems of the prior art, and allows a long strip film to be easily inserted by hand without using any special insertion aid. To provide a jacket for a strip film which can hold the film in a fixed position.

[Structure of the invention]

In order to achieve this object, in the strip film jacket of the present invention, the storage sections for storing the strip film are provided spaced apart from each other in the length direction of the long strip film to be stored. , a joint between two front and back plates that can come into contact with one longitudinal edge of the strip film, and a space slightly larger than the width of the strip film from these joints; A pair of positioning means each having a joint portion of one front and back plate that can contact the other longitudinal side edge of the strip film, which are provided to be offset relative to each other, are attached to a long sheet to be stored. They are formed at large distances in the length direction of the film.

Therefore, according to the film jacket for strips of the present invention, the long strip film to be stored is spaced apart greatly in the length direction, and from the joint between the front and back plates, which are provided offset from each other. Since the storage section is formed by a pair of positioning means that are widely spaced apart in the length direction of the strip film, the long strip film inserted into the storage section is spaced slightly apart in the width direction. Since both ends are supported by each pair of joints, the strip film can be reliably held in a predetermined position.

In addition, since the joints of each set are offset from each other in the length direction of the film to be stored, when inserting a long strip film, it is necessary to A deviation from the insertion direction of the strip film can be tolerated, and the corner portions of the strip film are not caught in the joints, making the insertion work easy.

The present invention will be explained below based on the drawings. In addition,
In the figure, the same reference numerals as in FIG. 7 represent the same parts.

FIG. 1 shows a first preferred embodiment of the jacket for strip film of the present invention. In the jacket 40 of this embodiment, the front plate 2 and the back plate 4 are joined by heat welding or adhesive, for example.
Two joints 12 that are spaced apart from each other in the length direction of the long strip film 10 to be stored and that can come into contact with one side edge of the strip film in the longitudinal direction; from the joint 12 of the strip film 10 in the width direction of the strip film 10 to be stored, and at a distance slightly larger than the width of the strip film 10 to be stored, and mutually biased in the length direction of the strip film with respect to the two joint parts. one joint 12 that can be moved and contacted with the other side edge of the strip film, and a pair of positioning means can be moved from the set of joints by three of them in a large direction in the length direction of the strip film. By separating them, a storage section 6 was formed.

Such a jacket for strip film 4
0, as is clear from FIG. 1b, which shows a cross section taken along the line - in FIG. Between the parts 12 and 12, there is a front plate 2 and a back plate 4.
Since there is no joint with the strip film 10, for example, in the extending direction A of the storage section, the strip film 10
Even if the insertion direction of the strip film is slightly inclined, as shown in FIG. This makes it easier to insert the strip film. Moreover, the strip film that has passed through the positioning means located close to the film insertion opening 8 is guided by this positioning means and advances into the storage section 6, so that the strip film passes through the gap W located apart from the film insertion opening 8. When it reaches another positioning means, it smoothly moves inside this other positioning means and reaches a predetermined position. Furthermore, since the interval W between the joints forming the storage section 6 is substantially equal to the film width, the strip film 10 held by the pair of positioning means will not jump or shift within the storage section.

In this embodiment, the peripheral edge 14 of the jacket relative to the film insertion opening 8 is sealed to prevent the film 10 from slipping out to the left in FIG. 1a, but the sealed left end portion is opened. It is also possible to adopt a structure in which the strip film 10 can be inserted from either the left or right insertion opening.

A second preferred embodiment shown in FIG. 2 includes a pair of positioning means spaced widely apart in the length direction of the strip film to be stored.
The surface plate 2 is made to intersect with the extending direction A of the storage section 6.
The film insertion slot 8 is divided into two parts, and at least one surface plate part 2' is made openable and closable in the extending direction of the storage part 6.
shall be.

To use the jacket 50 shown in this embodiment, as shown in FIG. Push the lip film 10 toward the left end of the storage section. When the storage of the left half of the strip film 10 is completed, as shown in FIG. is pushed toward the right end of the storage section to complete storage of the right half of the strip film 10. Then, the surface plate portion 2' is closed to prevent dust in the air from adhering to it.

In this embodiment, since the strip film 10 is stored separately in the left and right storage sections,
The distance to push the strip film 10 in one operation is short, and the position adjustment including rotation of the strip film relative to the storage part 6 becomes easy, making the storage work easier. In the embodiment, the jacket was formed by joining the front and back plates 2 and 4, which had substantially the same shape, but as shown in FIG. The jacket 50 may be formed by folding and joining the front plate portions 2', 2' and the back plate 4 as described above. In this case, there is no need to rejoin both ends of the storage portion, which is advantageous from both manufacturing and economical points of view.

Yet another embodiment of the invention is shown in FIG. This strip film jacket 55 is constructed by dividing the top plate 2 across the extending direction A of the storage section 6, and in each of the divided halves, one of a pair of positioning means is disposed. and the positioning means are paired with each other.
The joint part 1 of the front and back plates 2 and 4 forming the positioning means is similar to the embodiment shown in Figure a.
2 are provided at a distance slightly larger than the width of the long strip film to be stored, and are relatively offset in the length direction of the strip film as a set. The difference is that each half of the face plate is provided separately.

This jacket 55 has the same function as the other embodiments described above, but the number of joints between the front and back plates is small, and the direction in which the strip film 10 is inserted and the extension of the storage section 6 are fixed. Since a larger deviation between the two directions is allowed, there are advantages such as easier insertion of the strip film.

FIG. 4 shows the jacket shown in FIG. 2, with perforations 18 provided along one peripheral edge to facilitate the organization and storage of a plurality of jackets. Of course, it can also be provided in the jacket 40 shown in FIG.

FIG. 5 is a diagram showing a fourth preferred embodiment of the jacket for strip film of the present invention;
As clearly shown in Figure b, the strip film 10
This jacket 60 is provided with a light attenuation zone 22 around an image area 20 to prevent light from leaking from a light transmitting zone 24 made up of front and back plates, thereby making it possible to obtain an image with high contrast. For this purpose, as shown in FIG.
It is preferable to form a jacket by folding along 6.
In particular, in the strip film jacket of the present invention, the storage space W is made slightly larger than the width of the strip film 10, and the strip film 10 is held at the end of the film. The attenuation zone 22 can be accurately set without overlapping the attenuation zone 20 and without creating a transparent zone between the attenuation zone 22 and the film image area 20.
can be provided.

This is very advantageous in view of the narrow distance between the film winding sprocket hole and the film image area. For example, if a known loose-type jacket is provided with a light attenuation band so as not to overlap the film image area, in the known jacket, the film bounces in the storage compartment, so not only does the film image area overlap the light attenuation band. On the side opposite the overlapped part, light leaks through the sprocket hole,
The image becomes very difficult to see. On the other hand, with the jacket of the present invention, such inconvenience does not occur because the strip film can be held in a fixed position.

Furthermore, in some of the embodiments described above, if the front plate 2 and the back plate 4 are made of transparent plastic sheets, direct projection can be performed using a projector 26 shown in FIG. This is because the strip film 10 can be held accurately, and when projecting, the jacket 60 is mounted on the jacket holder 28, which can be moved in the same plane on the frame of the projector 26, for example. glass plate 3
All you have to do is press it using 0. Moreover, the projected image has a high contrast and is very easy to see.

〔Effect of the invention〕

As described in detail above, in the strip film jacket of the present invention, the storage portions for storing the long strip film are spaced apart from each other in the length direction of the long strip film. a joint between two front and back plates that can contact one longitudinal edge of the strip film; A pair of positioning means each having a joint portion of one front and back plate that can come into contact with the other longitudinal edge of the strip film, which are provided to be offset relative to each other, can be reliably held in place. Furthermore, since this positioning means is provided spaced apart in the length direction of the strip film, even if the insertion direction of the strip film is slightly off from the extending direction of the storage part, the strip film can be pushed in and adjusted afterwards. Therefore, the long strip film can be easily inserted by hand without using any special insertion aid. Furthermore, in a jacket in which the front plate is divided, a film insertion opening is provided in the middle part of the storage part, and both ends of the storage part are closed, the insertion work is much easier and there is no fear that the strip film will fall out from inside the storage part. Moreover, since the film can be held in place reliably, it can also be projected by a projector. In addition, since the film can be held in a fixed position, it is possible to accurately provide a dimming zone in areas other than the image area of the film. Therefore, since unnecessary light does not leak from areas other than the image area, there are many advantages such as being able to obtain a high contrast image when, for example, the jacket is mounted on a light table for inspection.

The strip film jacket of the present invention is not limited to the above-mentioned embodiments, and can be modified in various ways within the scope of the claims. For example, the front plate may be made transparent and the back plate made of plain material. At the same time, it is also possible within the scope of the claims of the present invention to provide a light attenuation zone to facilitate visual inspection of the strip film, or to appropriately select the hardness or softness of the front and back plates depending on the purpose of use.

[Brief explanation of drawings]

Fig. 1a is a plan view showing a first embodiment of the jacket for strip film of the present invention, Fig. 1b
is a cross-sectional view along the line - of Fig. 1a, Fig. 1c
2 is an explanatory view showing how to insert a strip film, FIGS. Figure 2 c and d
2 is an explanatory view showing how to use the jacket shown in FIG. 2a, FIG. 3 is a front view showing a third embodiment of the jacket for strip film of the present invention, and FIG. FIG. 5 is a diagram showing another embodiment of the jacket for strip film according to the present invention; FIG.
FIG. 6 is a diagram showing the projectable strip film jacket of the present invention mounted on a projector, and FIG. 7 is a diagram showing a conventional strip film jacket. 2...Front plate, 2'...Front plate part, 4...Back plate, 6...Storage section, 8...Film insertion slot, 1
0... Strip film, 12... Joint part, 1
4... Peripheral portion, 16... Folding line, 18... Binding hole, 20... Image area, 22... Attenuation band, 24...
... Transmission band, 26 ... Projector, 28 ... Jacket holder, 30 ... Glass plate, 40, 50, 5
5, 60... Jacket for strip film of the present invention, 70... Jacket for conventional strip film.

Claims (1)

[Scope of Claims] 1. A front plate and a back plate of plastic, a storage part for a long strip film formed by joining these front and back plates, and insertion of the long strip film into the storage part. In the strip film jacket, the storage portions are provided spaced apart from each other in the length direction of the long strip film to be stored, and the storage portions are spaced apart from each other in the length direction of the long strip film to be stored, a joint between two front and back plates that can contact one longitudinal edge of the film; The length of the strip film to be accommodated includes a pair of positioning means each having a joint portion of one front and back plate that can contact the other longitudinal edge of the strip film. A strip film jacket characterized by being formed with large distances in the direction. 2. The surface plate is divided into two parts so as to include one of the pair of positioning means, crossing the extending direction of the storage section, and at least one surface plate portion is divided into two parts, and at least one of the surface plate parts is
Claim 1: The storage section can be freely opened and closed in the extending direction, and the strip film insertion opening is provided.
A jacket for strip film as described in . 3. The positioning means is made up of two pieces arranged at a distance slightly larger than the width of the long strip film to be stored and relatively offset in the length direction of the strip film. A jacket for a strip film according to claim 2, which is formed by a joint between front and back plates of a set. 4. Claims 1 to 4, wherein at least one of the front plate and the back plate is provided with a light attenuation zone, leaving a portion that overlaps with the image area of the long strip film stored in the storage section. 3. A strip film jacket according to any one of item 3. 5. The strip film jacket according to any one of claims 1 to 4, wherein at least one of both ends of the storage portion is closed.