JP3000911U - Round bottom bag made of synthetic resin - Google Patents

Abstract

(57) [Abstract] [Purpose] Automatic bag making by bag making the bag bottom into a bellows fold bottom and heat sealing the lower edges of the outer folds in parallel to form a series of open bottoms. It enables low-cost mass production with a machine, eliminates the need for two separate round bottom plate members, and simply sets the circular bottom plate inside the bag bottom to open a round bottom bag immediately under the round bottom. Various products under simple manufacturing means. [Structure] A bellows folding bottom 3 in which a bag bottom portion of a soft resin bag body is provided with outer folding portions 2 and 2'on both sides with an inner folding portion 1 sandwiched therebetween.
Fold it in two, and put side heat seals on both sides of the bottom 3.
4 ′ and heat-sealing 5, 5 ′ parallel to the outer folds 2, 2 ′ along the lower fold edge, and from the insertion set of the circular bottom plate 7 of the corresponding diameter to the round bottom Become.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a round bottom type synthetic resin bag intended for waterproofing.

[0002]

[Prior art]

 Most conventional bags made of soft synthetic resin sheets or tubes for waterproofing have a folded bottom bag or a bag bottom made of soft synthetic resin folded material. It relates to a square bottom bag with a gusset folded, and not a round bottom bag, but a round bottom handbag such as a round bottom commonly known as Shingen bag, one round bottom member of a completely different member was attached to the bag bottom and processed Japanese Patent Laid-Open No. 60-198228 has been proposed as the prior art, which is that the bottom portion of the bag of the synthetic resin sheet is formed into a round bottom type by spending time and time in advance. On the other hand, the present invention relates to a complicated structure and a complicated structure in which two hard resin round bottom plates are separately overlapped and fused to form a complicated round bottom. Also, in the case of cloth and leather round bottom bags, the round bottom plate is separately sewn to the bag bottom.

[0003]

[Problems to be solved by the device]

 As described above, the conventional round-bottomed bag according to Japanese Patent Laid-Open No. 60-198228 has a very complicated and troublesome means for making a round bottom of a bag body, and further, a round bottom portion of two separate round bottom plates. However, because of the mounting of a separate round bottom plate, it is not possible to perform simple bag-making using a conventional automatic bag-making machine. The present invention eliminates the drawbacks of the prior art by considering the drawbacks such as high cost and also the necessity of two round bottom plates, which results in high material cost and is uneconomical. By folding the bag bottom into a series of bellows folding bottoms related to continuous inner and outer folding, and making a bag, and heat sealing the lower edges of the outer folding parts in parallel to form a series of open bottoms. Enables low-cost mass production using conventional automatic bag-making machines, Like the round bottom plate member also be unnecessary, thereby realizing an inexpensive mass production provides waterproof round bottom resin bag 此種,

In addition, the circular bottom plate can be instantly completed under the round bottom by inserting the circular bottom plate into the bag at the time of use or after work and setting it inside the bag bottom. To provide highly productive and demanding products under simple manufacturing means,

Another object of the present invention is to make the bag convenient by allowing the bag to be folded and stored in a small size by removing the round bottom plate.

[0006]

[Means for solving the problem]

 In order to achieve the above object, the present invention has a bag bottom portion of a synthetic resin bag body formed by side-sealing and bag-sealing a bag material of a soft synthetic resin sheet or a tube, with an inner folded portion sandwiched therebetween. It is folded on a bellows fold bottom with outer folds on both sides, and both sides of the fold bottom are side heat sealed by bag processing, and the outer folds are heat sealed in parallel along the lower fold edge. It is characterized by comprising a round-bottom bag and an insertion set for the inner bottom surface of a circular bottom plate having a diameter corresponding to the round-bottom of the bag. The outer folds are made longer than the outer folds, and the side heat seal for bag processing is applied over the lower end of the outer folds. The long range is the skirt edge It may be applied in accordance with the lower fold edge of a main inner folded part.

[0007]

[Work]

 By folding the bag bottom of the soft synthetic resin bag to the bellows fold bottom with the outer folds on both sides of the inner fold, and heat sealing in parallel to the outer fold along with the heat-sealing bag. , The bellows fold bottom is an open round bottom with the side heat seal edges on both sides as fulcrums, the outer folds are facing three months, the inner folds are elliptical, and the outer folds have heat seal edges. As the bag opens, the bottom of the bag becomes a series of open round bottoms. Insert one resin, cardboard or board circular bottom plate of the corresponding diameter into the bag bottom and set it against the inner surface of the bag bottom. For example, the bag bottom becomes a round open bottom that surely opens along the circumference of the bottom plate.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of a bag-making process of a resin sheet S which is a soft synthetic resin material. The bag bottom of the sheet S folded in two is placed outside on both sides of the inner fold 1 by an automatic bag-making machine. The folded portions 2 and 2'are connected and folded on the bellows folding bottom 3.

Then, including both sides of the folding bottom 3, as shown in FIGS. 2 and 3, side heat seals 4 and 4'in bag processing are performed, and outer folding portions 2 and 2'are formed into lower folding edges. It is configured by heat sealing 5, 5'in parallel along the part.

In addition, in the case of making a handbag, as shown in the drawing, the bag edge portion is inwardly folded and processed, and the hand strap T is fitted into the mouth. For example, Shingen bag type round bottom bag May be planned. Also, instead of the resin sheet S, the tube material of the same material can be used as the bag material. In this case, if both sides of the tube are used as side seals, the lower part of the peripheral body part is a bellows bottom, and the upper part is a bag mouth, the bag can be cut to make the same product as the sheet.

As an example of the folding mode of the bellows folding bottom 3, as shown in FIGS. 1 to 3, both inner and outer folds are formed at the same height, and as shown in FIG. 7 and FIG. This is also applicable when making the external folding section 2 or 2'longer than 1. In this case, the bag-processed side heat seals 4, 4'are applied over the long lower ends of the outer folds 2, 2 ', and the heat seals 5, 5'provided parallel to the outer folds 2, 2'are inside. The outer folds 2, 2'over the fold 1 will be aligned with the lower fold edges of the inner fold 1 so that the long areas of the skirt edges 6, 6 '. The number of continuous inner and outer folds of bellows can be increased by increasing the number of outer folds 2 and 2 '. Reference numeral 7 in the figure denotes a circular bottom plate made of resin or cardboard or a plate having a corresponding diameter, which is inserted into the bag to open the folding bottom 3 to form a round bottom.

By configuring the present invention as described above, the bellows folding bottom 3 becomes a round bottom that opens reliably, easily and smoothly. That is, when the fold bottom 3 is opened, the outer folds 2 and 2'are opened to face each other for three months, and the inner fold 1 is opened to an elliptical shape. As the seals 5 and 5'open, the bag bottom will open in a round bottom shape. Therefore, when the circular bottom plate 7 is inserted into the bag and is set against the inner surface of the bag bottom, the bellows folding bottom 3 can easily and immediately form a reliable round bottom along the circumference of the bottom plate 7.

If the outer folds of the bellows folds are made longer than the inner folds, and the outer folds 2, 2 ′ are aligned with the lower fold edges of the inner folds and heat-sealed 5, 5 ′ in parallel, the outer folds are formed. Since the long range of the skirt edges 6 and 6'becomes the opening of the skirt edges 6 and 6'covers the open round bottom, a really good round bottom bag is provided, and the skirt edges 6 and 6'are provided. The heat-sealing 5, 5'for forming'is safely secured by the lower edge of the inner folded portion 1 and the heat-sealing bag making by the automatic bag-making machine is convenient and safe. .

[0014]

[Effect of device]

 1. As a result, a series of bellows folding bottoms 3 open to the round bottom just by inserting and setting the circular bottom plate 7 into the bag, and it is convenient and easy to provide a simple waterproof round bottom bag. When the bottom plate 7 can be taken out of the bag, the bag is small and can be folded and stored, which is very convenient for use. 2. A simple folding means that folds the bag bottom of resin sheet or tube material to the inner and outer continuous bellows fold bottom 3, bag processing, and parallel heat seal processing for only the outer folds 2, 2 ' As a result of being able to mass-produce inexpensively with a bag-making machine, the manufacturing cost is significantly reduced and the mass-productivity at low cost is excellent. 3. Since it is a soft resin material, bellows folding and heat sealing can be done with ease and mechanical force, so a cheap and convenient waterproof round bottom bag can be provided. 4.1 Bottom plate member is sufficient, so bottom plate compared to conventional products The cost is low, the bottom plate member is saved, which is economical, and since the bottom plate is not complicatedly fixed to the bag, the bag can be easily manufactured, resulting in an inexpensive product. 5. The cost is very low, so it is widely used not only for hand-held round-bottomed bags but also for packaging bags for cheap services such as circular containers and disposable items, and is highly demanded. 6. If the bellows fold is made longer on the outer side than on the inner side and the skirt edges 6 and 6'are provided, the open round bottom will be shaded by the skirt edges 6 and 6 ', which is a good combination with the skirt design. It becomes a round-bottom bag and the demand is improved. Further, the heat seals 5 and 5'for forming the skirt edges 6 and 6'are convenient for the sealing process by removing the lower edge of the inner folded portion 1 and are easy to manufacture. 7. By setting the circular bottom plate 7 on the inner surface of the bottom of the bag, the bellows folding bottom 3 of the soft thin sheet that opens in a round bottom shape can easily and instantly form a reliable round bottom along the circumference of the bottom plate 7. The slack of the open bellows fold bottom 3 is prevented, the stability of the round bottom is secured, and even if heavy items are stored, the bag bottom does not have an awkward downward slack. It is convenient to provide an economical synthetic resin round-bottom bag that is highly productive and flexible and thin. There is a great effect such as.

[Submission date] January 24, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

Then, including both sides of the folding bottom 3, as shown in FIGS. 2 and 3, side heat seals 4 and 4'in bag processing are performed, and the outer folding portions 2 and 2'are set to lower folding edges. The heat-sealing members 5 and 5 ′ are arranged in parallel along each other to form the synthetic resin bag a.

[Brief description of drawings]

FIG. 1 is a perspective view of a bag manufacturing process for a resin sheet.

[Figure 2] Front view of the product

FIG. 3 is a conceptual diagram of a vertical cross section of line AB in FIG.

FIG. 4 is a perspective view of a usage state with an open round bottom.

FIG. 5 is a perspective view of the bottom of the bag showing a set of circular bottom plates.

[Figure 6] Bottom view of the open round bottom

FIG. 7 is a front view of another embodiment.

FIG. 8 is a partially cutaway perspective view of a skirt showing a usage state in which an open round bottom of another embodiment is used.

FIG. 9 is a conceptual diagram of a vertical side surface of the bag bottom portion of FIG.

[Explanation of symbols]

 a ・ ・ ・ ・ ・ ・ ・ ・ Synthetic resin bag 1 ・ ・ ・ ・ ・ Inside fold 2,2 '・ ・ ・ ・ ・ Outside measurement fold 3 ・ ・ ・・ ・ ・ ・ Bellows fold bottom 4, 4 '・ ・ ・ ・ ・ ・ Side heat seal 5, 5' ・ ・ ・ ・ ・ Heat seal 6, 6 '・ ・ ・ ・ ・ ・ Skirt edge

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B65D 33/02 6916-3E 33/28 6916-3E

Claims (2)

[Scope of utility model registration request] 1. A bag bottom portion of a synthetic resin bag body a, which is produced by side-sealing and bag-sealing a bag material of a soft synthetic resin sheet or a tube, and an outer folded portion on both sides with an inner folded portion 1 interposed therebetween. Fold it on the bellows bottom 3, which is a series of 2, 2 ',
A circle formed by bag-making side heat seals 4 and 4 ′ on both sides of the folding bottom 3 and heat seals 5 and 5 ′ parallel to the outer folding portions 2 and 2 ′ along the lower folding edge. Bottom bag and circular bottom plate 7 having a diameter corresponding to the round bottom of the bag
A round-bottom bag made of synthetic resin, characterized by comprising: 2. The bellows fold of the bellows bottom 3 is made longer at the outer folds 2, 2'than at the inner fold 1, and the bag-shaped side heat seals 4, 4'are made at the outer folds 2, 2. '
Heat seals 5 and 5'applied to the outer folds 2 and 2'in parallel with the outer folds 2 and 2 '. The round bottom bag made of a synthetic resin according to claim 1, wherein the round bottom bag is made in conformity with the lower folding edge of the inner folding part 1 so as to be '.