JPH0531657Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a peel-apart type instant film unit.

[Conventional technology]

Peel-apart type instant film unit (hereinafter simply referred to as film unit)
For example, as described in detail in Japanese Patent Application Laid-open No. 61-48840, the main components are a photosensitive sheet that records a latent image of a subject and an image receiving sheet that receives the latent image of this photosensitive sheet and forms a positive image. It is said that The photosensitive sheet is connected to a pull-out sheet, and the image-receiving sheet is joined to a mask sheet in which an opening corresponding to the screen size is formed, and this mask sheet is joined to the pull-out sheet. And, such a film unit is
Multiple units are stacked and stored in a film pack.

A film unit pull-out opening is formed at one end of the film pack, and the film pack is used by being loaded into a pack holder provided with a pair of developing rollers. The exposed film units are then pulled out one by one through the draw-out opening and passed through the pair of developing rollers. At this time, the developer pot provided with the film unit is torn open, and the developer is spread between the overlapping photosensitive sheet and image-receiving sheet.

When pulling out an exposed film unit, the tab attached to the leading end of the pull-out sheet is first pulled out from the tab pull-out opening of the pack holder. This allows the leading end of the drawn sheet to enter between the developing rollers. As the tab is further pulled, the leading end of the pull-out sheet passes between the developing rollers and projects out of the pack holder, and the tab is peeled off from the leading end of the pull-out sheet.
Thereafter, by grasping the leading end of the pull-out sheet and pulling it out, the photosensitive sheet and image-receiving sheet bonded to the pull-out sheet overlap and pass through the developing roller.

[Problem that the invention attempts to solve]

By the way, when the film pack is loaded into the pack holder, only the tab protrudes to the outside of the pack holder. On this protruding tab, an indication indicating the type of film and a number indicating the number of sheets of film are printed.

However, as shown in FIG. 3, in the conventional film unit, there is a display 49 indicating the type of film.
is printed on the folded inside of the tab 48, and there is a problem in that in order to check this, the tab must be turned over and observed from the back side of the film pack.

[Purpose of invention]

The present invention has been developed in view of the shortcomings of the conventional technology. Even if a film pack is loaded in the pack holder, it is possible to observe the type of film currently loaded without having to turn over the tab. To provide an instant film unit equipped with a tab that allows the type of film to be confirmed regardless of its orientation.

[Means for solving problems]

In order to achieve the above object, the present invention prints the same information indicating the type of film on both sides of the folded tab on both sides of the returned tab.

[Effect]

With the above method, it is possible to check the type of film loaded in the film pack from both sides without having to turn over the tab even if the pack holder is loaded in the camera. .

An embodiment of the present invention will be described below with reference to the drawings.

〔Example〕

FIG. 1 shows a film pack disassembled. The film pack 1 consists of a bottom cover 2 made of a thin metal plate that provides elasticity, and a film pusher plate 3.
and a pack body 4 obtained by molding, for example, high-impact polystyrene. Spring plate portions 5 are formed on both sides of the bottom cover 2 and bent inward to press the leg portions 6 of the film press plate 3 and urge the pressure plate portion 7 upward. The bottom cover 2 is attached to the pack body 4 so that the film pushing plate 3 is sandwiched between the bottom lid 2 and the pack body 4.

The peel-apart type film unit is
a photosensitive sheet 10 located on the pressure plate section 7;
In order to pull out the photosensitive sheet 10, a pull-out sheet 11 connected to the photosensitive sheet 10, and a mask sheet 13 having one end adhered to the pull-out sheet 11 and supporting the image-receiving sheet 12 are provided.
A developer pot 15 filled with a developing solution is provided near the connecting portion between the photosensitive sheet 10 and the pull-out sheet 11. Also, drawer sheet 1
One end of a tab 17 is adhered to the tip end side of the tab 1 .

At the other end of this tab 17, there is a fold line 17a which is bent in order to be adhered to the tab of the next film unit.
It is printed as a heaven. Further, a number 52 is printed below the display 50 to indicate the number of shots taken by the film unit.

The surface of the image receiving sheet 12 is covered with the mask sheet 1
It is exposed through the opening formed in 3. and,
The pull-out sheet 11 for pulling out the photosensitive sheet 10 and the subsequent parts extend to the lower side of the film pusher plate 3 via a folded part 20 which is rounded and bent on the left side of the film pusher plate 3.

FIG. 4 shows the state in which the film unit 8 is loaded into the film pack. The film pack 1 is loaded with ten film units, but only one is shown to simplify the drawing. The tab 17 protrudes from the film pack 1 so as to be above the pair of developing rollers 30 and 31. The tab 32 of the second film unit is shown by a two-dot chain line, and the bent end portion of the tab 32 is glued to the tab 17.

When the tab 17 is pulled out by hand after the photosensitive sheet 10 is exposed, the pull-out sheet 11 is pulled out together with the tab 17. At this time, mask sheet 13
The leading edge of the drawer sheet 11 is gradually turned over.
It moves towards the exit of the film pack 1 while overlapping the film pack 1. Then, the photosensitive sheet 10 is guided by the folded portion 20 of the film pushing plate 3 fitted into the pack body 4, goes behind it, and is reversed.

As the tab 17 is pulled out through the upper side of the developing rollers 30 and 31, the drawn sheet 1
When the leading end of the tab 1 comes out a little from between the spreading rollers 30 and 31, the joint 17a at the rear end of the tab 17 is peeled off from the drawer sheet 11 by the wedge action of the spreading roller 30. Next, if you grab the tip of the drawer sheet 11 with your hand and pull it out, the drawer sheet 11
and the mask sheet 13 are passed between the developing rollers 30 and 31 in an overlapping state, and then the photosensitive sheet 1
0 and the image receiving sheet 12 pass between developing rollers 30 and 31 in an overlapping state.

The drawer sheet 11 is spread out by the development rollers 30, 31.
When passing through, the developing solution pot 15 attached thereto is crushed, and the jelly-like developing solution flows out backward. This flowing out developing solution is spread out by development rollers 30 and 31, and
A uniform thickness is created between the facing photosensitive sheet 10 and image receiving sheet 12, and the negative image recorded on the photosensitive sheet 10 is transferred to the image receiving sheet 12 as a positive image. When the photosensitive sheet 10 and the image-receiving sheet 12 are peeled off after a standard peeling time (standard development time), a photographic image can be obtained on the image-receiving sheet 12.

FIG. 2 shows the appearance of the pack holder on the drawer opening side. A pack holder 40 into which the film pack 1 is loaded consists of a holder main body 41 holding a roller assembly, and a cover 43 in which an aperture 42 defining an exposure range is formed. The cover 42 and the holder main body 41 can be opened and closed via a well-known hinge mechanism, and the aperture 42 is set in close contact with an exposure frame provided on the back of the camera. In addition, the cover 43 has
Slit 41a for pulling out the film unit
Apart from this, there is an opening 43a for pulling out the tab 17.
is formed.

Tabs 17,1 protruding from this opening 43a
7', 17''... As mentioned above, an indication 50 indicating the type of film and a number 52 indicating the number of shots are printed on each.In particular, the indication 50 is printed so that even if it is loaded in the camera, there is no need to turn it over. It is also now possible to check from both sides.

In order to pull out the exposed film unit, the tab 1 protrudes from the opening 43a of the cover 43.
7, this pulls out the drawer sheet 11.
The leading end 16 of the film is pulled out from the film pack 1. The tip 16 slides to the right while slidingly contacting the top surface of the sponge pad 26, and is further guided by the top surface of a guide plate (not shown) provided on the roller assembly to 3 the developing roller 3.
Enter between 0 and 31. Expanding rollers 30, 31
Since the minimum distance 〓 is wider than the thickness of the pull-out sheet 11, the sheet passes through between the developing rollers 30 and 31 and further projects out of the pack holder 40 through the slit 41a. Then, by further pulling the tab 17, the tab 17 is removed from the drawer sheet 1.
Peel off from 1. Note that the tip of the tab 17' of the next film unit is lightly adhered to the tab 17, so that when the tab 17 is peeled off as described above, the next tab 17' will protrude from the opening 43a. Become.

[Effect of idea]

As explained above, in the film unit of the present invention, an indication indicating the type of film is printed on both sides of the folded tab, so that even after the pack holder is loaded into the camera, it is easy to use. without flipping tabs,
The type of film loaded in the film pack can be easily confirmed from both sides of the camera.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a film pack containing a film unit using the present invention. FIG. 2 is a perspective view of a main part showing the appearance of the drawer opening when a film pack containing a film unit according to the present invention is loaded into a pack holder. FIG. 3 is a perspective view of a main part showing the external appearance of the drawer opening in a state where a conventional film pack containing a film unit is loaded into a pack holder. FIG. 4 is a sectional view of a main part of the film pack holder when it is loaded with a film pack. 1...Film pack, 8...Film unit, 10...Photosensitive sheet, 11...Drawer sheet, 12...Image receiving sheet, 17, 17', 17''...
...Tab, 17a...Border line, 40...Pack holder, 50...Display showing the type of film.

Claims (1)

[Utility Model Registration Claim] A peel-apart type instant film unit which is stored in a film pack which is loaded into a pack holder and which comprises a photosensitive sheet, an image-receiving sheet, a pull-out sheet for overlapping and pulling out these sheets, and a tab for leading the pull-out sheet out from an opening formed on one end of the film pack, the tip of which is folded back to connect to the tab of the film unit to be used next, characterized in that the same indication indicating the type of film is printed on both sides of the folded-back portion on the surface of the tab folded back as described above.