JPS5849963Y2 - Pillow-shaped packaging with gusset - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pillow-shaped package with a gusset that has particularly high sealing properties.

Among box-shaped packages, in so-called pillow-shaped packages in which top seals are formed at both ends by butt-bonding of packaging materials, as the thickness H increases, gussets (packaging corresponding to the thickness of the box) are formed at the top seals. The amount of the folded part) increases.

On the other hand, a connecting portion of the packaging material is formed as a center seal band against the body of the package, and this is folded along the body.

In conventional packages of this type, the fold line 11 of the center seal band 1 was placed at the center of the body as shown in FIGS. 1 and 2, so that the entire center seal band Therefore, it is bent and formed at a position closer to the side (to the left in the illustrated embodiment) than the center position.

The end of the center seal band 1 is crimped together with the other general part 21 and the gusset 23 to form the top seal part 2. In this case, in the top seal part 2, the bent end of the center seal part 22 is produces a part that overlaps with the gazette 23, so the second part is used as the top seal part.
As shown in the enlarged view, 2-ply section C14-ply section A, 6
If the packaging film is particularly thick, as in stacked part B, parts with different thicknesses are formed, and the pressing force is not applied evenly, making it impossible to seal completely. there were.

Also, there is an unsealed part (pinhole) at the tip of the gazette 23.
24 was formed, which had the disadvantage of further impairing the sealing performance.

The purpose of the present invention is to improve the sealing performance of the top seal part of a pillow-shaped package, and for this purpose, it is to provide a folding means that ensures uniformity in the thickness of the part that becomes the top seal. .

The present invention provides a pillow-shaped package with a gusset, which is circularly packaged so that the center seal band of the seal packaging material is located at the center of the body of the packaged object, and top seal portions are butt-bonded and formed at both ends of the package. When the butt line of the center seal band is moved to a side position away from the center line of the body, and the center seal band is folded toward the body, the center seal band folds into both side gussets. The part between the tips is constructed so that it can fit into the entire body.

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

As shown in FIG. 5, the crease line 11 of the center seal band 1 is set at a position moved laterally by a predetermined distance 1 from the center line C of the body surface of the package P, and the center seal band is moved toward the center side. The center seal band is set so that the entire center seal band is located at the center of the body surface when it is bent.

Therefore, the center seal portion 22 in the top seal portion 1
are stacked between the left and right gazettes 23, as shown in FIG. 4, so that they do not overlap at the same position as the gazettes 23.

Therefore, the overall configuration of the top seal portion 2 is as follows: -crotch portion 21
The four-layered portion formed by the gusset 23 and the four-layered portion formed by the crotch portion 21 and the center seal portion 22 are in a continuous state, and the entire surface becomes a four-layered layer and the thickness is made uniform.

In the present invention, it is desirable to determine the folding width L2 of the center seal part 22 according to the folded length Ll of the gusset 23, and it is set so that the fold line 11 of the center seal part is aligned with the folded end of the gusset 23. However, in this case, as shown in FIG. 6, if the ends of the center seal part 21 are set so as to slightly (width α) overlap with the folded end of the gusset 23, the center seal part 22 will be able to close to the gusset during the crimping process. 23, thereby preventing the occurrence of unsealed portions (pinholes).

As described above, according to the package of the present invention, the sealing performance is further stabilized by simply shifting the position of the center seal band, so that the shelf life of the packaged product is improved.

Furthermore, since the thickness of the top seal portion is uniform, the adhesive effect for sealing is improved, and there is no need to use strong adhesives or the like.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional pillow-shaped package with a gusset, Fig. 2 is an enlarged sectional view taken along line II-II in Fig. 1, and Fig. 3 is a pillow-shaped package with a gusset according to the present invention. FIG. 4 is an enlarged sectional view taken along the line IV-IV in FIG. 3, FIG. 5 is an explanatory diagram showing the misalignment of the center seal, and FIG. It is an explanatory view showing a combination form. 1: Center seal band, 2 Ni dobutsu seal part, 21 Ni general part, 22: Center seal part, 23 Ni gazette, P: Packaging body.

Claims (1)

[Scope of utility model registration request] In a pillow-shaped package with a gusset, which is wrapped so that the center seal band of the seal packaging material is located at the center of the torso of the packaged object, and which is formed by butt-adhering top seal parts at both ends of the package, the center seal band of the center seal band is When the position of the butt line is moved to a side position away from the center line of the body and the center seal band is folded toward the body, the center seal band is approximately between the folded ends of the gussets on both sides. A pillow-shaped package with a gusset characterized by being structured so that it can fit into the whole body.