JPS5940303Y2 - packaging bag - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a substantially conical packaging bag that can be stood upright when filled with items.

2. Description of the Related Art Triangular shaped packaging bags for storing foods and the like have been widely known.

However, in such a triangular packaging bag, the part to be filled with stored items is limited to the bottom of the bag, so complex processing cannot be performed when welding this bottom. .

On the other hand, in recent years, rectangular or other bags have been devised in which a bottom wall with a needle-removal shape is provided at the bottom so that the packaging bag can stand up when filled with items. In a rectangular packaging bag, the bottom wall can be formed first and the contents can be filled from the top of the bag, but in a triangular packaging bag, the bag can be filled from the bottom as described above. Since it had to be filled with material, processing such as attaching a needle-shaped bottom wall portion in advance was extremely difficult.

The purpose of the present invention is to provide at a low cost a packaging bag that can stand upright when loaded with items and has a substantially conical shape with a solid bottom structure, and has achieved this purpose. Therefore, the gist of the present invention is to attach two isosceles triangular pieces made by adhering an adhesive resin having a lower melting temperature than the film sheet to one side of the film sheet, each with an appropriate width from the bottom edge of the film sheet. The bottom edge side is opened by bending the triangular pieces in an inverted ■ shape toward the side to which the adhesive resin is attached, making the adhesive resin attachment sides of both triangular pieces face each other, and heat-sealing the left and right ridge edges and top edges thereof. The opening side of the bottom edge of the main body is formed into an arc shape with the narrowest width at the center of the bottom edge within the range of the folded part of the ■ shape, and only the surfaces to which the adhesive resin is attached meet. It is made by heat-sealing and sealing.

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

In the figure, 1 and 1 are two triangular pieces made of transparent film sheets forming a substantially isosceles triangle;
A resin that fuses at a lower temperature than the film sheet is adhered to the entire inner surface of each of the film sheets.

The triangular pieces 1, 1 have their bottom sides bent inward to form a bottom wall portion 2,
2 and are folded back outward at intermediate positions 2a and 2a, respectively, to form opposing pieces 2b and 2b.

Then, by heating the right and left edges and the top of the triangular piece 1.1 along with the left and right side edges of the bottom wall parts 2, 2 to a certain width, the resin is fused 3, 3 to form the main body part A forming a triangular bag shape. form.

At this time, by forming the bottom wall portions 2, 2 in a shape slightly smaller than the outer dimensions of the left and right side edges as shown by the broken line in Figure 2, it is possible to completely fuse the left and right side edges from the top to the bottom. can.

Reference numeral 4 denotes a tear cut cut provided at the outer edge of the fused portion 3 below the sealing portion 5 at the top of the main body A.

The bag-shaped main body A is made by sandwiching the bottom wall parts 2, 2 of the triangular pieces 1, 1 at the fused parts at both ends, with the sealing part 5 at the top facing downward, and narrowing the gap to open the interior. It has a cylindrical opening and is filled with stored items through the opening.

Thereafter, the bottom of the main body A is heated from the outside of the main body A at a temperature at which the resin is fused in an arc shape with the center bulging downward as shown by diagonal lines in FIG.

In this case, the resin attached to the back surfaces of the triangular pieces 1, 1 melts only in the heated portion, so that the portion where the back surfaces of the triangular pieces 1, 1 face each other, that is, the body portion A and the bottom wall as shown in FIG. The bent portions 6, 6 of the portions 2, 2 and the opposing piece portions 2b, 2b are fused 7 to form a sealed constant surface.

If the bottom wall parts 2, 2 are placed on the lower side, the stored item B will fall downward, resulting in 0 portions that are not fused (the part where the outer surfaces of the film sheets are folded is not fused because the resin is not attached). Not done.

) is expanded into a substantially circular shape as shown in FIG. 8, and the packaging bag can be erected based on this substantially circular bottom surface.

In this way, the sealed part 5 is opened by tearing the cut 4, and the stored items are dispensed in appropriate amounts for use, but since the opening has a narrow conical shape, the stored items do not come out too much. In addition, since it has a conical shape, the center of gravity is low, and it can stand up on its own in a stable state during use, eliminating the inconvenience of accidentally tipping over and spilling out stored items.

As described in 4 above, in the packaging bag of the present invention, the bottom wall portion is integrally provided by bending the bottom sides of two triangular pieces constituting the main body portion, and the center portion of the bottom wall portion is placed downward from the outside. By heating in the bulging arc shape, only the portions where the back surfaces of the triangular pieces face each other are fused together, and a conical packaging bag with a substantially circular bottom can be formed very easily.

Furthermore, when filling the container with stored items, the folding of the bottom wall increases the rigidity and allows the opening to be formed into a stable shape, making the filling operation easier.

Furthermore, since the packaging bag of the present invention is made up of two triangular pieces, the film sheet can be used effectively without producing cutting waste, so there is no wastage of materials, and there are advantages in terms of cost.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a perspective view, Fig. 2 is a front view, Fig. 3 is a sectional view taken along line a and a of Fig. 2, and Fig. 4
The figures are an enlarged cross-sectional view taken along line B of Figure 2, Figure 5 is a bottom view, Figure 6 is a perspective view of the filled state, Figure 7 is a sectional view of the same as above, and Figure 8 is a plan view of the same as above. It is. 1.1...Triangular piece, 2,2...Bottom wall part, 3,3°7...Fusion, A...Body part.

Claims (1)

[Scope of utility model registration request] Two isosceles triangular pieces made by adhering an adhesive resin having a lower melting temperature than the film sheet to one side of the film sheet, respectively, from the bottom edge thereof by an appropriate width toward the side to which the adhesive resin is attached. The triangular pieces are bent into an inverted ■ shape, the surfaces to which adhesive resin is applied of both triangular pieces face each other, and the left and right ridge edges and the top edge are heat-sealed to form a bag-shaped main body portion with the bottom edge side open. Then, the opening side of the bottom edge of the main body is sealed by heat-sealing only the surfaces to which the adhesive resin is attached in an arc shape that is narrowest at the center of the bottom edge within the range of the folded part of the ■ shape. A packaging gloss that is characterized by a permanent finish.