JPS6151397A - Film jacket - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) This invention is a microfilm and a negative film.

This film jacket is suitable for storing and organizing long strip films such as positive films, and for projecting film images on an overhead type projector while maintaining the stored state. It is.

BACKGROUND OF THE INVENTION Known film jackets for housing long strips of film are generally divided into two types as described below.

One of them is, as shown in FIG.
The film accommodating portion C formed between the adjacent joint portions 8 and 8 has a width W considerably wider than the width W of the strip film A. One is a loose type film jacket, and the other is a so-called closed type film jacket in which the width of the film storage section is slightly larger than the film width.

(Problems to be Solved by the Invention) Here, in the loose type film jacket, since the width W of the film storage section C is considerably wider than the film width W, it is easy to insert the long slide film A therein. Although there are advantages, it is not possible to accurately specify the film position in storage section C in the length and width directions, and for this reason, for example, a film jacket containing positive film cannot be attached to an overhead type projector. When projecting a film image using a projector, there are problems in that it is virtually impossible to always reliably position the center of the positive film on the optical axis of the projector and to completely eliminate the tilt of the image. Another problem was that the strip film A fell off while the film jacket was being carried.

On the other hand, closed-type film jackets do not have the same problems as loose-type film jackets, but once the strip film is inserted, the width of the film storage section and the length of the film do not occur. It is difficult to insert the film, and even if there is a slight difference between the direction of insertion and the direction in which the film storage section extends, there is a problem that the corner of the film may catch on the joint between the front and back plates, causing the film to bend. Ta.

This problem is particularly serious for endoscopic films, microfilms, etc., where the film width is small compared to the film length, and is even worse when special auxiliary equipment is required to insert this type of film into its storage compartment. This made the film insertion work even more troublesome.

The present invention advantageously solves such problems of the prior art by providing a very simple way to insert a length of film strip, while also ensuring that the length of film is held in place once inserted. It provides a film jacket that can be used.

(Means for Solving the Problems) The film jacket of the present invention is particularly characterized in that the long strip film storage section is provided with a large distance in the length direction of the film to be stored therein, and Two short joints of plastic front and back plates that contact one side edge of the direction, and are provided at a distance corresponding to the width from these short joints in the width direction of the film,
It is formed between the short or long joints of the front and back plates that fall within the spacing between the short joints and contact the other side edge of the film in the width direction.

(Function) In this film jacket, when a long strip of film is inserted, the joints on each side of the film that form the film storage area come into contact with the film only at positions where the joints on the opposite side do not contact the film. In other words, the joints on both sides of the film come into contact with each side edge of the film at positions spaced apart in the length direction of the storage compartment.
Even if the direction in which the storage section extends and the direction in which the film is inserted are somewhat different, the insertion is not hindered by the abutment between the joint and the corner on the leading end of the film, and therefore the film is not bent. Nor. When the film is finished being inserted, for example, the film is rotated to the side opposite to the side where the film is allowed to tilt until the rotational movement of the film is restrained by the joint. By matching the insertion direction and the extending direction of the storage section, the film can be easily and reliably stored in a predetermined position. In this stored state, since the distance between W in the film width direction of the joint part is the distance corresponding to the film width,
Movement of the film in the width direction is effectively prevented by contact between the film and the joint, and movement in the length direction is effectively prevented by the frictional force exerted on the film by the joint and the front and back plates.

(Example) The present invention will be explained below based on illustrated examples.

FIG. 1 is a plan view showing an embodiment of the present invention.
．． Reference numerals 2 denote a red face plate and a back face plate, respectively, and these face plate 1 and back face plate 2 are formed, for example, by folding back a transparent plastic sheet from approximately the center thereof. It goes without saying that the front and back plates 1.degree.2 may be formed from two completely separated sheets.

Here, the front and back plates 1.2 are joined over a short distance by adhesive, heat fusion, etc. at two locations widely separated in the length direction of the long strip film 3 to be stored.
These short joint parts 4.4 are made to be able to contact one side edge in the width direction of the strip film 3, and are spaced apart from these short joint parts 4.4 in the film width direction by a distance corresponding to the width thereof, and For example, a short joint part 5 of the front and back plates 1.2 is provided within the distance between the short joint parts 4, 4, and a storage part 6 for the long strip film 3 is formed between these joint parts 4, 5. Here, the short joint part 5 and the short joint part 4
．． 4 corresponds to the width of the film 3, the short joint 5 contacts the other side edge in the width direction of the film 3 inserted into the storage section 6 and prevents its movement in the width direction. to bound.

In addition, in the figure, Fig. 1 (a) shows both joint parts 4.4 (b)
Figure 1(C) is the same as Figure 1(b). Two joints shown 5.5
are connected to each other to form a long joint 7, and each of these joints 5.7 is directly connected to the joint 4.
In cooperation with the film 3, the movement of the film 3 in the width direction is reliably restrained.

In the figure, 8 indicates a binding hole provided at the folded end of the plastic sheet, and 9 indicates a film insertion slot provided between the free ends of the front and back plates. The edge position of one of the face plates 1.2,
This can be easily done by biasing it toward the hole 8 side.

According to the film jacket configured in this way,
When inserting the long strip film 3 into the storage section 6 through the film insertion opening 9, the joints 4, 5 or 4.7 are spaced apart in the length direction of the storage section 6 and are connected to each side edge of the film 3. Since the film 3 is arranged so as to be in contact with each other, the insertion resistance of the film 3 is small and the insertion is easy, and as shown in FIG. However, when the film 3 is inserted, it does not come into contact with the leading end corner h (junction), and therefore problems such as bending of the film 3 and the inability to insert the film 3 occur. If the insertion direction and the extending direction of the storage part match (if inserted, then push the film 3 in the same position to the end of the storage part,
On the other hand, when the film insertion direction is inclined with respect to the extending direction of the storage section, the film 3 is rotated to the opposite side to the tilted side, and the rotational movement is restrained by the joint part 5 or 7. After that, by pushing the film 3 to the end of the storage section while maintaining the film posture, each long strip film 3 is completely stored in a predetermined device.

The film 3 inserted into the storage section 6 in this way moves in the width direction under the cooperation of the joints 4 and 5 or the joints 4 and 7 provided at intervals approximately equal to the width of the film. The movement of the film 3 in the length direction is sufficiently prevented by the frictional force exerted on the film 3 by the joints 4, 5 or 4.7 and the front and back plates 1.2. Therefore, the strip film 3 can be effectively positioned at a predetermined position. Therefore, when carrying the film jacket, the long strip film 3 will not fall out from the storage section 6, and when projecting the image on the film 3 inside the film jacket, an erect image can be placed at a predetermined position on the screen. can always be delivered reliably.

FIG. 3 is a wide-scale plan view of a portion 1 showing another embodiment of the present invention. At least one of the front and back plates 1 and 2 is provided with a light-shielding or light-attenuating zone 10 that includes a joint 4°5.7 and extends in the length direction of the film 3, as shown by diagonal lines in the figure. .

In this example, in particular, the attenuation zone 10 completely covers the perforated area of the long strip of film 3 that is securely positioned in the storage 6, so that the image of the film 3 stored in the film jacket is exposed to light. When visually checking through the water,
The light passing through the perforated area of the film 3 will not interfere with the work, and when projecting the film image, the light passing through the perforated area will not abnormally increase the illuminance on the screen, and the image will not be affected. The g-prize will not be hindered.

This invention has been explained above based on the illustrated example, but the long strip 1
~If your main purpose is to organize and store lip film,
The back plate is made of a milky white material, and the light beams transmitted through it and diffused facilitate preliminary inspection of film images. It is also possible to divide each joint 4 in the illustrated example into two or more point-shaped joints, or to provide separate point or short joints at the outer positions of the joints 4.4.

(Effects of the Invention) Therefore, according to the present invention, in particular, the bonding portion that contacts each side edge in the width direction of the film is inserted into the film width, and the frictional force between the bonding portion and the front and back plates is used to hold the bonding portion in a predetermined position. Can be reliably maintained in position. In addition, the joints that contact one edge in the width direction of the film are spaced apart greatly in the length direction of the film, and the short or long joints that contact the other side edge of the film are spaced within the spacing of the other joint. By placing the joints on both sides of the film in contact with each side edge of the film at positions spaced apart in the length direction of the storage part, the film can be inserted in the direction of insertion and in the direction of extension of the storage part. Even if a slight deviation occurs, the insertion of the film is sufficiently ensured, so that the insertion work can be performed extremely easily and efficiently.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the present invention, Fig. 2 is an explanatory view showing the film insertion state, Fig. 3 is a partially enlarged plan view showing another embodiment of the invention, and Fig. 4 is a conventional FIG. 3 is a plan view showing an example. 1... Front plate 2... Back plate 3... Long strip film 4, 5. 7...Joint part 6...Storage part 9...
Film insertion slot. Patent applicant Slidex Co., Ltd. Figure 1 Figure 2 (a)

Claims (1)

[Claims] 1. A front plate and a back plate made of plastic sheets, a long strip film storage area formed by joining these front and back plates, and a long strip film that can be inserted into this storage area. In the film jacket, the storage part is provided with a large distance in the length direction of the long strip film to be stored therein, and the storage part is provided with a large distance in the length direction of the long strip film to be stored therein, and is connected to one side edge in the width direction of the long strip film. two short joints of the front and back plates that are in contact, and a distance corresponding to the width of the long strip film from these short joints in the width direction of the long strip film, and falling within the spacing between the two short joints; A film jacket formed between short or long joints of front and back plates.