JPH0483246A - Photographic film cartridge - Google Patents

Abstract

PURPOSE:To easily and securely reuse the resin of a cartridge main body at low cost and to improve the strength to a shock by covering the cartridge main body with a heat-shrinkable synthetic resin film after printing. CONSTITUTION:The cartridge main body 13 which contains a spool 12 rotatably is covered with the heat-shrinkable synthetic resin film 14. A print 19 displaying film information such as sensitivity and a photographable frame quantity is provided on the surface of the shrinkable film 14. Consequently, the synthetic resin film is peeled after the film is used to easily and completely remove the print surface, and the resin of the cartridge main body can easily and securely be reused at low cost for the molding of a photographic component. Further, the fitting of the cartridge main body is reinforced, so the cartridge becomes tolerant to a fall and a shock at the time in transportation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a photographic film cartridge in which the leading edge of the film is sent out from a film outlet by rotating a spool.

[Conventional technology]

In recent years, many photographic film cartridges have been proposed in which the leading end of the film stored in the cartridge body is ejected by rotating the spool (for example, Japanese Patent Laid-Open No. 1-3068
Publication No. 44). The cartridge main body of this photographic film cartridge is made by fitting two parts made of resin instead of the conventional metal parts, since it is necessary to provide a mechanism 1, such as a rib, for preventing winding loosening inside the cartridge body. Furthermore, film information such as film sensitivity and the number of frames that can be taken is printed on the surface of the cartridge body.

[Problem to be solved by the invention] By the way, ``In recent years, it is undesirable for large amounts of plastic molded products to be disposed of, and from the viewpoint of environmental conservation and reduction of industrial waste, it is becoming increasingly common to collect plastic molded products. It is considered to be reused.

However, as mentioned above, film information etc. are printed on the surface of the cartridge body, and if the cartridge body is melted as is and the resin is reused, some of the paint components for printing will have a negative effect on the photographic emulsion. There is a problem of giving It is also possible to remove the print and then melt it, but this is very cumbersome and expensive and is almost impossible to implement. Furthermore, the cartridge main body has a weak fitting part and has the disadvantage that it may break due to impact when dropped or transported.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a photographic film cartridge in which the resin of the cartridge main body can be easily and reliably reused for molding photographic parts at low cost, and which has increased strength against impact.

[Means to solve the problem]

In order to achieve the above object, the photographic film cartridge of the present invention has a cartridge main body covered with a printed heat-shrinkable synthetic resin film.

(Function) According to the above configuration, since the cartridge main body is covered with a synthetic resin film, the strength against impact is increased.

Further, after the used photographic film cartridge is collected, the synthetic resin film covering its surface is peeled off. The main body of the cartridge is disassembled and the photographed film is taken out and processed. The printing on the cartridge body is completely removed at the same time as the synthetic resin film is peeled off, and any dirt that may have been accumulated during handling by the user is also removed at the same time, so by melting the cartridge body, the original resin can be completely restored. It can be returned. Therefore, this resin can be used again for molding various photographic parts 2, such as cartridge bodies.

Embodiments of the present invention will be described in detail below with reference to the drawings.

〔Example〕

In FIG. 1 showing a first embodiment of the present invention, a photographic film cartridge 10 includes a spool 12 wound with 135 type film, a cartridge body 13 rotatably housing the spool 12, and a cartridge main body 13 that rotatably stores the spool 12. Covered heat-shrinkable synthetic resin film (hereinafter referred to as shrink film) 14
It is coated with

The cartridge main body 13 consists of an upper main body 13a and a lower main body 13b, both of which are molded from, for example, polystyrene resin containing carbon black. The protrusion of the boat portion 15 is minimized,
The end portions 1.5a and 15b of the boat portion 15 are formed with a radius of curvature of 0.5 mm. In addition, the cartridge main body 13
The ends other than the ends 15a and 15b have a radius of curvature of 0 to prevent the shrink film 14 covering thereon from tearing.
．． It is formed in an arc shape of 2 mm or more. After the upper main body 13a and the lower main body 13b were fitted together, only the side surfaces were fused together by ultrasonic sealing.

Note that a light-shielding telescope is bonded to the inner wall of the boat section 15 to prevent outside light from entering the cartridge body 13 from the film entrance/exit, but the telescope is not shown to avoid complicating the drawing. did.

The shrink film 14 is made of a synthetic resin film, such as a polyester heat shrink film, which remains in a stretched state and shrinks to return to its original size when heated. Other materials for the heat-shrinkable film include polyvinyl chloride, polypropylene, and polystyrene.

Polyvinylidene chloride, polyethylene, etc. can be used.

The shrink film 14 has a thickness of, for example, 0.65 mm,
It is formed into a long cylindrical shape with a diameter of about 24 mm, and as shown in FIG.
Cut into lengths of about m.

Then, after inserting the cartridge main body 13 with a diameter of 22 mm into this, it was heated by applying hot air at 100°C for 2 seconds.
Shrunk. After that, the film outlet 1 of the boat section 15
A slit 14a (see FIG. 1) having a width of 1 mm and a length of 37 mm is formed using a cutter or the like at a position corresponding to 8 so that the photographic film cartridge 10 can be used without peeling off the shrink film 14. did.

Further, on the surface of the shrink film 14, printing 19 is applied to display film information such as the sensitivity and the number of frames that can be photographed, as shown in the figure. Therefore, the patrone body 1
3 does not need to be printed directly, so after shooting,
The recovered cartridge main body 13 is a shrink film 1
If 4 is peeled off, it can be melted as is and can be reused for molding photographic parts.

Since the shrink film 14 can be flat-printed on the surface of the shrink film 4 in advance, it is clearer than printing directly on the circular cartridge body.
Moreover, it can be printed at low cost. In addition, by covering the cartridge with the shrink film 14, the cartridge is tightened by the heat shrinkage of the shrink film 14.
The strength of the cartridge main body 13 is improved, and an effect is also obtained that it will not be destroyed even by impact such as dropping.

Next, in FIG. 3 showing a second embodiment of the present invention, a cartridge main body 21 of a photographic film cartridge 20 has a shape in which a port portion 22 protrudes, unlike the first embodiment. The radius of curvature of the end portions 22a and 22b was Q, 4 mm. The cartridge main body 21 consists of an upper main body 21a and a lower main body 21b, which are molded from, for example, polystyrene resin as in the first embodiment. The upper main body 21a and the lower main body 21b are
After fitting, only the side surfaces were fused using ultrasonic sealing.

Shrink film 24 covering the cartridge body 21
A polyvinyl chloride film was used. In addition, a slit 2 is provided at a position corresponding to the film outlet 25.
4a, and a print 26 for displaying film information such as sensitivity and expiration date is provided at a position corresponding to the cartridge main body 21 side. In the photographic film cartridge 20 having such a configuration, there is a space 2 below the port portion 22 where the shrink film 24 does not come into close contact with the cartridge main body 21.
I can do 8. Since this part can be easily torn by pressing strongly with a fingernail or the like, the shrink film 24 can be easily peeled off from this part. Furthermore, if the shrink film 24 is always peeled off after photographing by utilizing this, it can be used as an indication as to whether or not the photograph has been completed.

In the third embodiment of the present invention, after fitting the upper body 21a and the lower body 21b in the second embodiment, they are covered with a shrink film 24 without being fused.

For each of the above examples, the first comparative example, and the second comparative example, tests were conducted to determine whether the cartridge main body was destroyed by dropping, whether the cartridge main body was suitable for reuse, and whether the printing was clear or not.The results are as follows. It is shown in Table 1. Note that in the first comparative example, the upper main body 21a and the lower main body 21 are similar to the second embodiment.
After fitting the parts b, both side parts are ultrasonically fused, but the heat shrink wrapping using the shrink film 24 is not performed, and the film information is printed directly onto the surface of the cartridge main body 21 using the button press method.

In the second comparative example, the ends of the cartridge main body 21 of the second embodiment are formed into an angular shape instead of having a gentle curve. In addition, in the drop test, each photographic film cartridge was dropped naturally onto a concrete floor from a height of about 1 m, and the cracking of each cartridge body was evaluated.

Note that the ◯ mark above indicates that the product was judged to be good, the X mark indicates that it was judged to be poor, and the ∆ mark indicates that it was judged to be intermediate between the ◯ mark and the × mark.

As a result, in the drop test, the first comparative example and the second comparative example were broken into two pieces, but none of the examples of the present invention was broken. Furthermore, in each of the Examples, the printing could be completely removed by peeling off the shrink film, so there was no problem in reusing the resin of the cartridge body. Furthermore, regarding the clarity of printing, each of the examples printed on shrink film was much more beautiful and appealing to users than the first and second comparative examples. In the case of the second comparative example, the shrink film was torn from the end of the port portion, and uniform packaging could not be achieved, resulting in poor print appearance.

The photographic film cartridge of the embodiment described above can be used with a shrink film covered, but the slit corresponding to the film outlet may be omitted and the shrink film may be peeled off before use. .

〔Effect of the invention〕

As described above, according to the photographic film cartridge of the present invention, since the cartridge body is covered with a printed heat-shrinkable synthetic resin film, the printed surface can be easily removed by peeling off the synthetic resin film after use. It can be completely removed and the resin of the cartridge body can be easily used to mold photographic parts.

It can be reused reliably at low cost. Furthermore, since the fit of the main body of the cartridge is strengthened, it becomes resistant to shocks during dropping and transportation. Furthermore, since even the smallest characters can be printed clearly and beautifully, it is possible to make a good impression on the user and increase their desire to purchase. Furthermore, since the Mark II process can be carried out efficiently, there is also the effect that it can contribute to a reduction in manufacturing costs.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the appearance of a first embodiment of the present invention. FIG. 2 is a perspective view showing the relationship between the cartridge main body and the shrink film of the embodiment shown in FIG. 1. FIG. 3 is a perspective view showing the appearance of a second embodiment of the present invention. 10.20 ・ ・ 13.21 ・ ・ 14.24 ・ ・ 14a, 24a 15.22 ・ ・ 15a, 15b. Photographic film cartridge Patrone body Shrink film slit port section 2a 22b... End section 19.26... Printing 28... Space section. Figure Figure IJ (Patrone body)

Claims (1)

[Claims] (1) A photographic film cartridge in which a spool wound with film is rotatably housed in the cartridge body, and by rotating the spool, the leading edge of the film is fed out of the cartridge body from the film outlet, A photographic film cartridge whose main body is covered with a printed heat-shrinkable synthetic resin film.