JPS607331Y2 - continuous bag - Google Patents

Description

[Detailed description of the invention] This invention relates to a bag in which a synthetic resin-type flexible bag is continuous in the depth direction through discontinuous cuts.

This type of continuous bag is usually rolled up and left as is)
It is used by engaging a support device to unwind the roll of the required bag length one by one and dividing it at the discontinuous cut.In order to facilitate separation from the discontinuous cut, the applicant has Developed a bag with a long cut in the part (1972-
No. 147608).

This known bag is very convenient for being rolled into a roll, supported by a box or other case or supporting device, and successively unrolled for use as individual bags.

However, in order to make it easier to handle, this continuous bag must first be rolled up into a roll. As mentioned above, since there is a long cut in the center, there is a risk that stress will be concentrated at both ends of this long cut, and the discontinuous cuts connected to this will break, making it impossible to take up the waistband by breaking it all the way to the outside. There is.

Therefore, in the past, it required a high degree of skill and technique to reduce the tension to a level that would not cause breakage, and if the winding speed was increased, the tension would vary and there was a risk of breakage, so winding at a relatively low speed This resulted in poor efficiency and increased winding costs.

Therefore, this invention is intended to improve the drawbacks of the conventional continuous bags and to obtain a continuous bag that does not split at discontinuous cuts during winding.

In this device, the bottom seal of each bag is formed by welding synthetic resin-type flexible flat tubes in the transverse direction at predetermined intervals, and discontinuous cuts are made along this bottom seal near the bottom seal. In a continuous bag in which the discontinuous cuts have a longer cut in the central part than the other cuts, the continuous bag has holes that extend to both side edges of the continuous bag connected to the long cuts in the central part. This continuous bag is characterized in that the total length of the continuous portion between the cuts is smaller on the inside of the continuous cuts than on the outside.

The invention will now be explained based on the illustrated representative embodiment.

In the figure, 10 is a flexible continuous bag made of synthetic resin, which is generally a flat tube manufactured by the inflation method, a flat tube made by welding the opposite edges of two film strips to each other, or a tube made from a single film strip. It is formed by welding and sealing in the transverse direction at predetermined intervals.

11 is the bottom seal, 12 is a discontinuous cut along this bottom seal, and 13 is a long cut in the center of the discontinuous cuts. A long cut 13 of about 10 to 31 is made, and in the one in Fig. 2, there is a continuous part in the middle of the long cut, and the long cut 13 is divided into two. ing.

The number of divisions may be three.

From both sides of the long cut 13, the both side edges 14 of the continuous bag 10
The discontinuous cut 12 reaching up to 12 is divided into an inner 15 portion and an outer 16 portion, and the continuous portion 21 has a larger total length ratio on the inner side 15 than on the outer side 16.

To be more specific, the discontinuous cuts in the inner 15 portions are such that the cut portions 20 each have a length of, for example, 3771 m, and the continuous portions 21, that is, the dimensions between the cuts, are each 1 m.
The discontinuous cuts on the outer 16 portions are such that each cut portion 20 has a length of 5
The length of the continuous part 21 is ITIr! n, or the lengths of the cut portions 20 in the inner 15 portion and the outer 16 portion are both equal in length,
The length of the continuous portion 21 is longer on the inner side 15 than on the outer side.

The above-mentioned numerical value of the length of the cut is not limited to this embodiment, and can be appropriately selected depending on the strength of the film of the bag and the size of the continuous bag 10.

In the continuous bag 10 of this invention constructed as described above, even if tension is applied to wind it up, the total length of the continuous portion 21 is smaller in the inner 15 portion of the discontinuous cut 12 than in the outer 16 portion. is large, the inner 15 portions of the discontinuous cut 12 have higher tensile resistance than the outer 16 portions, and even if stress concentration due to tensile force occurs in the inner 15 portions, the breakage will not occur. It is possible to apply sufficient tension to wind up the bag into a roller shape, and it is possible to roll up a continuous bag tightly and quickly in a roller shape, and the roller does not collapse into a bamboo shoot shape during later handling. The container for packaging the roller-shaped product, such as a cardboard box, may also be made smaller.

Also, when supporting a rolled bag on a support device or pulling out the outer end of the continuous bag 10 placed in a suitable box 17 or other container, the width of the continuous bag 10 should be adjusted as in the conventional case. If you hold and pull the center part of the bag, the continuous bag 10 will break apart, and when the discontinuous cut 12 part separates from the roller part, the long cut 13 in the center will become the discontinuous cut 12 to open the mouth. I knew right away that there was something, so I put my finger in this part,
If the bag is pulled strongly, the discontinuous cuts 12 can be easily separated and an independent bag can be obtained.

In addition, when the roller-shaped continuous bag 10 is placed in a storage container 17 having a protrusion 19 at the center of the outlet edge 18 (see FIG. 3), the continuous bag 10 is placed in contact with the outlet edge 18. If it is pulled out, the long cut will definitely engage the protrusion 19, and if it is pulled any further, it will be separated by the discontinuous cut 12, and it can be used as a continuous bag 10 for a device that pulls out the bag by the amount of -.

In the embodiment shown in claim 2 of the utility model registration, since the total length ratio of the continuous portion 21 of the inner 15 portion is larger than that of the outer portion 16 (see Fig. 4), the tensile force of this inner 15 portion is However, since the length of each continuous portion 21 is the same as the continuous portions 21 of the outer 16 portions, it does not provide a particularly large resistance to sequentially dividing the bags from the inside. Easy to separate.

In the embodiment shown in claim 3 of the utility model registration, the continuous portion 2 at the inner 15 portion of the discontinuous cut 12
Since the length of 1 is slightly longer than the outer 16 parts (see Figure 5), the resistance to separate the bags into individual bags will be slightly greater than that of the conventional bag. Since the tensile force during winding can be sufficiently increased, tight winding and high-speed winding are possible.

Although this invention has been described with respect to a continuous bag 10 that is a flat bag, this invention is the same even if it is a continuous bag that is a gusset bag with folds on both sides.

[Brief explanation of the drawing]

The drawings show things related to this invention, in which Fig. 1 is a perspective view of a continuous bag wound into a roll, Fig. 2 is a partial plan view of the continuous bag, and Fig. 3 is a perspective view of a continuous bag rolled into a roll. A perspective view of the rolled continuous bag placed in a storage container and pulled out from there;
4 and 5 are enlarged plan views showing two embodiments of discontinuous score line sections. Code in the figure: 10... Continuous bag, 11...
Bottom seal part, 12...discontinuous cut, 13...
...Long cut, 15...Inside, 16...
・・Outside, 20・・・・Cut part, 21・・・・
・Continuous part.

Claims (3)

[Scope of utility model registration request] (1) The bottom seal of each bag is formed by welding synthetic resin-type flexible flat tubes in the transverse direction at predetermined intervals, and discontinuous cuts are made along this bottom seal near the bottom seal. In the case of a continuous bag in which a long cut is perforated in the central part of the discontinuous cut, and the cut is longer than the other cuts, the discontinuous cut extends to both edges of the continuous bag connected to the long cut in the central part. A continuous bag characterized in that the total length of the continuous portion between the cuts is larger on the inside of the discontinuous cuts than on the outside. (2) The above-mentioned "large total length ratio" means a utility model characterized in that the length of the inner continuous part is equal to that of the outer part, and the length of the inner cut part is shorter than that of the outer part. A continuous bag according to claim 1 of the registered claim. (3) The above-mentioned total length ratio is large, meaning that the length of the inner cut part is equal to that of the outer part, and the length of the inner continuous part is
2. The continuous bag according to claim 1, wherein each bag is longer than the outside.