JPS5912535B2 - Packaging method for flexible articles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for packaging flexible articles that are deformed by slight external pressure, such as packaging containers made of flexible materials.

Flexible items, such as cups made of aluminum foil used for cake cups, bento side dish containers, etc.
Normally, the appropriate number of pieces were stacked together to form a column, wrapped in kraft paper, etc., which has good shape retention, and wrapped.However, in addition to being time-consuming, packaging also allows moisture and dust to easily enter, impairing quality. Also, it was unhygienic.

Another option is to wrap the cups in a synthetic resin film, but since the shape of a pillar made by stacking cups tends to lose its shape, it is necessary to tightly wrap the film around the outer circumference of the cup to maintain its shape. If the cup cannot be held, the package will become uneven, making it inconvenient to handle, and there is also a risk that the cup may become unfitted and deformed during handling.

The present invention provides a packaging method that eliminates the above-mentioned drawbacks.

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

As shown in FIG. 1, a columnar body 1 is constructed by stacking a large number of cups 2 made of aluminum foil or the like and stacking them together.
Cover with heat shrink film 3.

That is, both ends of the film 3 are raised along the longitudinal side surfaces of the columnar body 1, and then, as shown in FIG. 2, both ends and both side edges of the film 3 are fused to seal the columnar body 1.
It is referred to as a package 4. Note that any method may be used for covering with the film; for example, the film may be made into a cylinder shape in advance, the columnar body 1 may be inserted therein, and then both ends may be heat-sealed. Further, it is preferable to leave a little space between the upper end of the columnar body 1 and the upper end of the package 4, as shown in FIG.

After folding this extra portion into the upper cup 2,
As shown in the figure, it is stored in a holding case 5. The holding case 5 consists of opposing end plates 5, 7 and a bottom plate 8, one end plate 6 is provided with a large number of /J-shaped L925) and the other end plate T and bottom plate 8 are provided with openings 10. . 30 The end plate 6, □ of the holding case 5 is for making the length (height) of the completed package 4 constant.

That is, the height of the columnar body 1 in which the cups 2 are stacked is not constant in the state shown in FIG. 2, and if the package 4 is completed as it is,
This is not only because the package is uneven and inconvenient to handle, but also because it is inferior in terms of commercial value. Note that when the package 4 is stored in the holding case 5, the upper end of the package is
Be sure to face the end plate 6 where the small hole 9 is provided. Next, the holding case 5 containing the package 1 is introduced into the hot air stove 12 and heated, so that the heat-shrinkable film 3 is contracted and brought into close contact with the columnar body 1.

At this time, since the openings 10 and 11 of the holding case 5 are large, the shrinkage rate of the film 3 is large when it comes to the outer periphery and lower end of the package 4, and the upper end that is in contact with the end plate 6 has a large shrinkage rate.
Since the small holes 9 are provided in the film 3, the amount of hot air passing through is limited, and the shrinkage rate of the film 3 is reduced. The reason for doing this is as follows. That is, as shown in FIGS. 1 and 2, the end of the columnar body 1 in which the cups 2 are stacked is concave in the same shape as a single cup.
At the outer periphery of the upper end, the film 3 is
This is undesirable because if the upper end is shrunk, the upper end will be deformed and some cups in that region will not be able to maintain the same shape as the other cups. Therefore, if the shrinkage rate of the film 3 is made small at the upper end of the package 4, the package 4 with a uniform diameter can be obtained as shown in FIG. Note that the shapes of the small holes 9 and the openings 10, 11 are arbitrary, and the porosity thereof is appropriately selected depending on the heating temperature, shrinkage rate of the film, heating time, etc. As shown in FIG. 6, a flange 1 is attached to the end plate 6 of the holding case 5.
3 can be provided. Alternatively, one end plate may be made to be able to slide along the bottom plate 8, and fixed at any position using a set screw 15 inserted into the long hole 14.
Any other known spacing adjustment means may be used. Although the above embodiments have been described for packaging cups made of aluminum foil, it goes without saying that the present invention can also be applied to other flexible articles such as paper cups.

In particular, when packaging flexible cup-shaped cases, the fifth
As shown in the figure, the film 3 shrinks to fit between the opening edge of the cup-shaped cases stacked in stages and that of the adjacent case, so it has excellent shape retention and the columnar body 1. Even if a margin is provided between the upper end and the upper end of the film 3 as shown by the chain line, the package 4 will not lose its shape, which is very effective. According to the packaging method of the present invention, the shape of the package is kept constant by the above-mentioned holding case b1, and at the same time the amount of heat during heating is controlled. Since a shaped package is obtained and sealed with a synthetic resin film, moisture, dust, etc. do not enter into the package, making it hygienic and durable for long-term storage.

In addition, compared to wrapping and wrapping with kraft paper,
There are various advantages such as being able to reduce costs.

[Brief explanation of drawings]

Figures 1 and 2 are perspective views showing the process of covering the cup-shaped case with a film, Figure 3 is a perspective view showing the same package housed in the holding case, and Figure 4 is heating the holding case. FIG. 5 is a front view of the completed package, and FIG. 6 is a perspective view showing a modification of the holding case. 1... Column, 2... Cup, 3...
... Heat shrink film, 4 ... Packaging body, 5.
...Holding case, 9...Small hole, 10...
...opening, 11...opening.

Claims (1)

[Claims] 1 A package is formed by covering and sealing a flexible article with a heat shrink film, and the ends of the package are placed in a holding case provided with opposing end plates with different flow rates of the heat medium. A method for packaging a flexible article, comprising storing the holding case in contact with a plate, placing the holding case in a heat medium, and shrinking the heat-shrinkable film.