JPH0423797Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention consists of overlapping two flexible plastic film sheets, bonding the bottom edge and both side edges with welding, etc., and opening the top edge. This packaging bag has a roughly trapezoidal bag body with an insertion opening, and is suitable for storing and packaging a triangular-shaped object, especially for soft foods such as sandwiches and castella cakes. It relates to packaging bags (generally called triangular bags).

[Conventional technology]

Traditionally, for example, a triangular sandwich was
It is generally packaged as follows. That is, sandwiches are stuffed into a packaging bag made of flexible and thin plastic film into a trapezoidal shape, each piece of the opening of the bag is folded inward to close it, and the top is glued with cellophane. It is glued and wrapped with tape.

When taking out the contents, the adhesive tape is peeled off to open the container.

However, since cellophane adhesive tape firmly adheres to the plastic film, it is difficult to peel off.
Therefore, it is difficult to open the bag when removing the contents. In addition, in order to remove the strongly adhesive tape as described above, it is necessary to squeeze the bag side and pull the tape strongly, but since sandwiches etc. are soft, the contents may be crushed when opening the bag as described above. Ta.

As a solution to the above problem, there is a method in which the bag body is perforated and the bag body is torn along the perforations. However, when perforations are made in the bag body, there is a risk of dust and moisture entering the bag body through the perforations, which is not sanitary, and there is also the problem of the contents drying out due to circulation with outside air. arise.

Therefore, in order to solve the above problems, the present inventor developed a packaging bag shown in FIG. 8 (unpublished) prior to the present application. As shown in FIG. 8, this prior art has a bag main body 1 in which a top sheet 2 and a back sheet 3 are overlapped, a bottom part 4 and both side edges 5a and 5b are adhered, and the upper end is opened to form an insertion opening 6. The bag body 1 has the following structure for storing and packaging a triangular object to be packaged inside.

(b) The bag body 1 is formed so that both side edges 5a and 5b become wider from the bottom 4 toward the insertion opening 6, and the width of the bottom 4 of the bag body 1 is determined by the thickness of the packaged item A to be stored. They are formed to have corresponding lengths so that the overall appearance is approximately trapezoidal.

(b) Top sheet 2 and back sheet 3 of bag body 1
The bag body 1 is made of a synthetic resin film material that has a cutting direction so that it can be easily torn in one direction, either vertically or horizontally. Both sheets 2 and 3 are polymerized to provide directionality.

(c) The above adhesive bonding on the bottom 4 of the bag body 1 is performed at a position leaving a margin piece 8 of an appropriate width at the bottom end of the bag body 1 (between the bottom 4 and the bottom edge 7).

(d) The margin piece 8 of the bag body 1 is provided with a notch 9 directed in the vertical direction.

The prior art is constructed as described above, and in its use, the packaged object A, such as a sandwich, etc.
(see Figure 10) into the bag body 1 through the insertion opening 6, and fold the front piece B, both side pieces C, D, and back piece E on the opening side of the bag body 1 inward one after another in the same way as before. Then, the lid is closed, and a cellophane adhesive tape 10 is adhered to the top of the lid as shown in FIG. 9 to seal it, and it is sold in this state.

When the purchaser takes out the contents from the bag, by pulling the margin piece 8 laterally from the cut 9, the bag body 1 is torn along the cut 9 as shown in Figure 10. The side of the is opened. The contents (sandwiches, etc.) can then be taken out from this opening.

[Problem that the invention attempts to solve]

According to the prior art, a packaging bag can be obtained which can solve the problems mentioned above with respect to the conventional packaging bags.

However, even this prior art has the following problems.

That is, in the prior art, the bag body 1 is made of a synthetic resin film material that has a cutting direction so that it can be easily torn in one direction. There's a problem. In addition, a notch 9 is provided in the margin 8 of the bag body 1 in the vertical direction, and the bag is opened by pulling the margin piece laterally from the notch. There is a risk of accidentally opening a part of the bag.

The present invention was devised focusing on the above points, and one of the purposes of the present invention is to create a packaging bag that is the same as the conventional packaging bag described above, without using special materials as in the prior art. The object of the present invention is to provide a packaging bag that can solve the problems mentioned above regarding the conventional packaging bags by using the above-mentioned materials.

Another object of the present invention is to provide a technology that can mass-produce packaging bags that can be easily opened with one touch at a low cost.

Another purpose of the present invention is to prevent the packaged contents (sandwiches, etc.) from drying out or during packaging.
To provide a packaging bag that can be kept sanitary by preventing dust, moisture, etc. from entering the bag.

[Means for solving problems]

The inventor of the present invention focused on the fact that by pressing heated metal onto a plastic film to form a line, the film becomes more prone to tearing in the heat-treated portion, and therefore applied this principle. This is how we arrived at the present invention.

That is, the structure of the present invention for achieving the above object will be explained using FIGS. 1 to 3, which correspond to the embodiments. The back sheet 13 is stacked, and the bottom edge 14 and both side edges 15a,
15b is glued to form a bag main body 11 with an opening at the upper end and an insertion opening 16, and the bag main body 11 has a bottom part. The width of the bottom edge 14 of the bag body 11 is formed to a length corresponding to the thickness of the packaged article A to be stored. The overall appearance is formed into a roughly trapezoidal shape, and the top sheet 12 or the back sheet 1 of the bag body 11
3, a cut line 18 is formed by hot pressing along the bottom edge 14 and both side edges 15a, 15b of the bag body 11, and at a position leaving a residual portion 17a of an appropriate width between the bottom edge 14 and the bottom edge 14. By applying this, the portion is configured into an opening tongue piece 19, and
The width of the upper side of the tongue piece 19 is determined by the bottom edge 1 of the bag body 11.
It is characterized by being formed longer than the width of No. 4.

[Effect of invention]

Next, the operation of the present invention will be explained with reference to FIGS. 4 to 6. First, when packaging, stuff A to be packaged, such as a sandwich, into the bag body 11 through the insertion port 16 (see Figure 4), and as in the conventional case, sequentially insert the edge of the bag body 11 on the insertion port 16 side. The lid is closed by folding it inward, and a cellophane adhesive tape 20 is adhered to the top of the lid as shown in the fifth figure to seal it. As a result, the article to be packaged A is hermetically packaged.

Next, when taking out the contents, pinch the lower end of the opening tongue 19 with your fingers and pull it.The material at the tear line 18 of the bag body 11 has changed to be easily torn due to the heat pressing process, so the tongue 19 is easily torn along the perforation line 18 as shown in FIG.
The tongue piece 19 portion of is opened. The contents (sandwiches, etc.) can then be taken out from this opening.

In addition, if the perforation line 18 is formed, for example, by a perforation, there is a risk that dust or moisture may enter the bag body through the perforation, which is undesirable from a sanitary standpoint, and there is also the problem that the contents may dry out due to circulation with outside air. However, since the perforation line 18 of the present invention is formed by hot pressing, there is no communication with the outside air through the perforation line 18. Therefore, the effect described in the case of perforations does not occur.

Furthermore, when the tongue piece 19 is opened as described above, the remaining portion 17a engages with the lower front end of the contents, thereby preventing the contents from slipping out.

〔Example〕

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

1 to 6 show a packaging bag showing one embodiment of the present invention. In these figures, reference numeral 11 denotes a bag body, which is made by overlapping a flexible and thin plastic top sheet 12 and back sheet 13, and by welding the bottom edge 14 and both side edges 15a and 15b. The insertion opening 16 is formed by adhering and opening the upper end.

The bag body 11 is formed so that both side edges 15a and 15b become wider in order from the bottom edge 14 toward the insertion opening 16, and the bag body 11 is a triangular bag A for packaging sandwiches or the like that accommodates the width of the bottom edge 14. It is formed to have a length corresponding to the thickness of , so that the overall appearance is approximately trapezoidal (inverted trapezoidal).

Top sheet 12 or back sheet 1 of bag body 11
3 (the top sheet 12 in the embodiment) is placed along the bottom edge 14 and both side edges 15a, 15b of the bag body 11, and has an appropriate width between the bottom edge 14 and both side edges 15a, 15b. A tear line 18 is formed by hot pressing at a position where the remaining portions 17a, 17b, and 17c are left, thereby forming a tongue piece 19 for opening the seal.

When forming the perforation line 18, the distance between the upper sides 18a, 18a of the line 18 is formed to be longer than the width of the bottom edge 14. As a result, the tongue piece 19
The width of the upper side is longer than the width of the bottom edge 14. With this configuration, when the opening tongue piece 19 is cut open, a portion of both front sides of the packaged object A is exposed from the bag body 11 as shown in FIG. 6, so that the contents cannot be taken out. It becomes even easier.

Therefore, in the packaging bag of the present invention, the above-mentioned perforation line 18 is placed on one sheet by, for example, a heated metal stamp (not shown) before bonding the two sheets 12 and 13 together.
is pressed onto the sheet surface, and the sheet with the cutout lines 18 and the sheet without the cutout lines 18 are overlapped, and the bottom edge 14 and both side edges 15 are formed.
It is manufactured by adhering parts a and 15b by welding or the like.

The packaging bag of this embodiment is constructed as described above, and its usage and function will now be explained.

The object to be packaged A, such as a sandwich, is stuffed into the bag body 11 through the insertion opening 16 (see Fig. 4), and the front piece B on the upper end side and the side pieces C of the bag body 11 are inserted manually or by an automatic machine as in the past. , D and the back piece E are sequentially folded inward to close the lid, and a cellophane adhesive tape 20 is adhered to the top of the lid as shown in FIG. 5 to seal it, and the product is sold in this state.

When the purchaser takes out the contents from the bag, the purchaser holds the item with one hand and pinches and pulls the lower end of the opening tongue 19 with the other hand, so that the tongue 19 opens as shown in the sixth figure. Since it is easily and neatly torn along the tear line 18, the tongue piece 19 of the bag body 11 is opened. Therefore, the contents can be easily taken out from this opening.

FIG. 7 shows another embodiment of the present invention. In order to simplify the explanation, parts having the same functions as those in the above embodiment are denoted by the same reference numerals, and detailed explanation will be omitted. In this embodiment, both corners of the upper end of the bag body 11 are formed into inclined cut surfaces 21, 21 which are cut off diagonally so that the width becomes narrower toward the upper end, and the insertion opening side of the bag body 11 is folded over. In this case, the folded side pieces are configured so that the ends of the folded side pieces do not protrude sideways and can be packaged in an attractive manner. The other configurations are exactly the same as the embodiments described above.

The packaging bag of this embodiment also functions in exactly the same manner as the embodiment described above.

[Effect of idea]

According to the present invention, the following main effects can be expected.

(a) By pinching and pulling the opening tongue, the bag can be easily torn open along the tear line, allowing the contents to be taken out from the opening.

(b) The width of the upper part of the tongue piece is longer than the width of the bottom edge of the bag body (the width of the bottom edge is the same width as the thickness of the contents), so when the tongue part is cut open, the contents are Since a portion of both front sides of the bag are exposed from the bag body, the contents can be easily taken out (see Fig. 6).

(c) Since a residual portion 17a of an appropriate width is left between the bottom edge of the bag body and the tear line, even if the tongue portion is opened, the residual portion 17a will not engage with the lower front edge of the contents. This prevents the contents from accidentally falling out of the bag.

(d) Since the perforation line is formed by hot pressing, there is no communication with the outside air through the perforation line, unlike when perforation is applied.
Therefore, it is possible to prevent the contents from drying out or from infiltrating dust or moisture into the bag, so it is possible to maintain the packaging of foods such as sandwiches in a good and hygienic manner. .

[Brief explanation of the drawing]

1 to 6 show one embodiment of the packaging bag according to the present invention, in which FIG. 1 is a perspective view, FIG. 2 is a front view, FIG. 3 is a rear view, and FIGS. Figure 6 is an explanatory diagram showing the packaging process, Figure 6 is an explanatory diagram showing the process of opening the bag, Figure 7 is a perspective view showing another embodiment of the present invention, and Figure 8 is a conventional packaging bag. 9 and 10 are perspective views showing an example of
It is an explanatory view showing the packaging process and the opening process. 11...Bag body, 12...Top sheet, 13...
...Back sheet, 14...Bottom edge, 15a, 15b...
...Side edge, 16...Insertion port, 17a, 17b, 17
c... Remaining part, 18... Cutting line, 19... Opening tongue, A... Item to be packaged.

Claims (1)

[Claim for Utility Model Registration] A top sheet and a back sheet made of flexible and thin plastic film are overlapped, the bottom edge and both side edges are glued together, and the top end is opened to form a bag body with an insertion opening. In a packaging bag for storing and packaging a triangular object to be packaged, the bag body is formed so that both side edges become wider from the bottom toward the top end, and the bag body has The width of the bottom edge is formed to a length corresponding to the thickness of the packaged items to be stored, and the overall appearance is formed into a roughly trapezoidal shape. To do this, a tear line is formed by hot pressing along the bottom edge and both side edges of the bag body, leaving an appropriate width between the bottom edge and the opening tongue. A packaging bag characterized in that the width of the upper side of the tongue piece is longer than the width of the bottom edge of the bag body.