JPH0650058U - Film transport leader - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a leader capable of firmly connecting a film by attaching a splice tape to one side of the film. [Structure] A pair of cutouts 3 is formed in an edge portion of a thin sheet body 1 having flexibility. Protrusions 4 are provided on the side edges of each notch 3. The tip of the film F drawn from the cartridge P is overlapped with the edge of the sheet body 1 and connected by attaching the splice tape T, the film F is inserted into the notch 3, and the projection 4 is attached to the film F. The splice tape T is prevented from coming off by the engagement.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a leader for transporting a film, which is used when developing a film.

[0002]

[Prior art]

 Generally, when developing a film by a leader transport type automatic film developing machine, as shown in FIG. 5, the leading end of the film F pulled out from the cartridge P is connected to a leader L made of a synthetic resin sheet, and the leader is formed. L is preceded and the film F is sent to the developing section.

When the film F is detached from the reader L during the development processing, the film F stops in the processing liquid, and the development processing of the film F cannot be performed. Moreover, it takes a lot of time and effort to take out the film F. There is a risk that the film will be exposed to light.

Therefore, the film F needs to be firmly connected to the reader L.

Therefore, conventionally, as shown in FIG. 6, splice tapes T 1 are attached to both surfaces of the film F to connect the leader L and the film F.

[0006]

[Problems to be solved by the device]

 By the way, since the splice tape T is a high-cost tape that is not melted by the developing solution, the splice tape T is attached to both sides of the film F, so that the amount of tape T used is large and the cost is low. It is disadvantageous and there is a problem that it is very troublesome to attach the splice tape T and detach the tape T for the developing process.

The present invention aims to solve the above problems, strengthen the connection of the film to the reader, and facilitate the work of connecting and disconnecting the film.

[0008]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in this invention, a notch is formed at the edge of a thin sheet having flexibility, and a protrusion is provided inward from the side edge of the notch. The structure was adopted.

[0009]

[Action]

 When connecting the leading edge of the film pulled out from the cartridge, stack the leading edge of the film on the edge of the sheet body, attach the film to the sheet body by attaching the splice tape, and then fit the film into the notch to insert the film. Engage the projection with.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the sheet body 1 is made of a synthetic resin sheet and has flexibility, and square holes 2 are provided at equal intervals in the central portion between both side edges.

The square hole 2 can be engaged with a sprocket incorporated in the developing section of the automatic film developing machine, and the rotation of the sprocket causes the sheet body 1 to be conveyed in one direction.

A pair of notches 3 into which the ends of the film F can be inserted are formed at both ends of the trailing edge in the transport direction of the sheet body 1, and a pair of protrusions are provided at both side edges of each notch 3. Piece 4 is provided.

The leader shown in the embodiment has the above structure, and when the film is conveyed to the automatic film developing machine, the leading end of the film F is pulled out from the cartridge P and connected to the sheet body 1. At the time of connection, as shown in FIG. 2 and FIG. 3, the front end of the film F is overlapped with both ends on the trailing side in the transport direction of the sheet 1, and the splice tape T is attached to connect to the sheet 1. Then, the film F is inserted into the notch portion 3 and the projecting piece 4 is engaged with the film F.

In general, the film F wound on the cartridge P has a curl, and the film F is curled by pulling out the leading end of the film F from the cartridge P. There are curls in the normal direction and curls in the opposite direction, and in any case, by sticking the splice tape T to the sheet body 1, the film F becomes a corrected and flat state, and the correction is performed. The restoring force due to the time deformation acts to separate the splice tape T.

By the way, in the present invention, in the connected state of the film F to the sheet body 1, the projecting piece 4 engages with the film F, and the engagement keeps the film F in the straightened state. The peeling force does not act on the tape T, and the film F can be securely held in the connected state by attaching the splice tape T to one surface of the film F, and the external force in the direction of peeling the splice tape T onto the film F is When applied, the external force can be received by the projecting piece 4, so that peeling of the film F can be reliably prevented.

In the embodiment shown in FIG. 1, a pair of projecting pieces 4 are provided on both sides of the cutout portion 3. However, as shown in FIGS. 4A and 4B, only one side of the cutout portion 3 is projected. The piece 4 may be provided.

[0017]

[Effect of device]

 As described above, in the leader according to the present invention, the pair of notches into which the leading end of the film is inserted are provided at the edge of the sheet body, and the side edges of the notch are engaged with the film. Since the protruding piece is provided, the splice tape can be attached to one side of the film to firmly connect the sheet body and the film, and it is possible to reliably prevent the film from peeling off when the sheet body is transferred. .

Further, since the film and the sheet body can be connected by attaching the splice tape to one side of the film, the film can be attached to the sheet body in comparison with the case where the splice tape is attached to both sides of the film. Connection and disconnection are extremely easy, and the amount of splice tape used is small, which is cost effective.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a reader according to the present invention.

FIG. 2 is a perspective view showing a state in which a film is connected to the above reader.

FIG. 3 is a sectional view of FIG.

4 (a) and 4 (b) are front views showing another example of the same reader.

FIG. 5 is a perspective view showing a conventional reader.

FIG. 6 is a sectional view of the above.

[Explanation of symbols]

 1 sheet body 3 notch 4 protrusion

Claims (1)

[Scope of utility model registration request] 1. A film-conveying leader in which a thin-walled sheet body having flexibility is provided with a cutout portion at an edge portion thereof, and a projecting piece is provided inward from a side edge of the cutout portion.