JP6946394B2 - Paper bag with flap and how to manufacture it - Google Patents

Description

The present invention relates to a paper bag and a method for producing the same, and more particularly to a paper bag with a flap capable of preventing the contents from getting wet even on a rainy day and a method for producing the same.

Now that marine pollution caused by plastic waste has become a major problem, there is an increasing demand for paper bags, which have a low impact on the environment, as a substitute for plastic bags. As an example of a paper bag that is handed to consumers when they purchase a product in a department store, there is a paper bag equipped with a cloth string for carrying.

Further, on a rainy day, as a measure to prevent rainwater from entering the inside of the paper bag, it is generally practiced to cover the paper bag containing the product with a plastic bag.

The paper bag described in Patent Document 1 does not need to be covered with such a plastic bag, and rainwater infiltrates into the paper bag by closing the opening with an opening / closing flap provided at the opening end of the paper bag. It is possible to prevent this.

Japanese Patent No. 3217650 Japanese Patent No. 5961650

However, if a plurality of holes are formed in the bag body of the paper bag shown in FIG. 1 of Patent Document 1 and a cloth string for shoulder bag is passed through the holes, the piece of paper at the perforated portion is single (1). Therefore, it is considered that there is a disadvantage that the paper is easily torn around the hole that receives stress from the cloth string when the paper bag contains a heavy article.

In addition, since paper bags are mass-produced, it is necessary to reduce the cost of manufacturing a paper bag with a flap that can prevent the contents from getting wet as much as possible.

A bag body including a front wall and a rear wall, and a bag body having a folded portion in which an open end portion of the bag body is folded inward over the entire circumference, and a front wall and a rear wall. In the bag where the side walls extending from the left and right ends are valley-folded inward together with a part of the folded part, the folds pass through a plurality of holes drilled in the overlapping part. Provided with a series of looped cloth cords, a predetermined portion of the fold portion is provided so that a predetermined portion of the fold portion that is not perforated on at least one of the front wall and the rear wall can be folded upward to form a flap. Provided is a paper bag with a flap, characterized in that a notch is formed at the position.

Further, a bag body including a front wall and a rear wall, and a bag body having a folded portion in which an open end portion of the bag body is folded inward over the entire circumference, and a front wall and a rear wall. In the bag where the side walls extending from the left and right ends of the wall are valley-folded inward of the bag together with a part of the folded part, a plurality of holes drilled in the place where the folded part overlaps. A series of loop-shaped cloth cords passing through the folds so that a predetermined unperforated portion of the fold on at least one of the anterior and posterior walls can be folded upward to form a flap. Provided is a paper bag with a flap, characterized in that it is perforated in place.

In one embodiment, both the anterior wall and the posterior wall are configured so that the unperforated predetermined portion of the folded portion can be folded upward, and the predetermined portion on both the anterior wall and the posterior wall is formed. It is characterized in that it is configured so that it can engage with each other when folded upward.

In still another embodiment of the present invention, the method of manufacturing a paper bag with a flap folds an open end portion over the entire circumference of the bag body including the front wall and the rear wall into the inside of the bag body to form a folded portion. A step to form a sack by folding the side walls extending from the left and right ends of the front wall and the rear wall together with a part of the fold inward to form a sack, and fold in the sack. The front wall and rear of the bag so that the step of drilling multiple holes in the overlapping parts and the predetermined non-perforated part of the folded part can be folded upward to form a flap. forming a notch or perforation in the position of the end side of the left and right is the outer position than the position of the root of the gusset portion in contact Keru fold in at least one wall, through Nunohimo the plurality of holes, viewed including the steps, a to the fabric cord in a series of loop, the step of the above series of looped, flaps folded upwards is further folded from top to bottom so as to cover the opening of the bag body When a series of looped fabric cords are pulled to one side of the bag body, the fabric cord is pulled to the front wall and the rear wall so that the flap can be pressed against the front wall or the rear wall of the bag body. It further includes passing through a hole formed in the wall and then forming a series of loops .

Further, the method of manufacturing a paper bag with a flap may include a step of applying a water repellent treatment to at least the surface of the bag body.

The figure which shows the paper bag with a flap in one Example of this invention. The figure explaining the usage of the flap of the paper bag shown in FIG. The figure explaining the usage of the flap in another example. The figure which shows the shape of the notch and the flap in various examples. The figure which shows the paper bag with a flap in another Example. The figure explaining the usage of the flap of the paper bag shown in FIG. The figure which shows the paper bag which the perforation was formed in the folding part. The figure which shows a state that a user carries a paper bag of this invention.

The flapped paper bag of the present invention (hereinafter, also simply referred to as “paper bag”) and the method for manufacturing the same will be described with reference to the attached figures.

As shown in FIG. 1A, the bag body of the paper bag 1 includes the front wall 2 and the rear wall 4, and the open end of the bag body is folded inward of the paper bag 1 over the entire circumference. It has a folding portion 10. The paper bag 1 is further provided with a gusset portion in which side walls extending from the left and right ends of the front wall 2 and the rear wall 4 of the bag body are valley-folded inward of the bag body together with a part of the folded portion 10. Has 6.

A plurality of holes 12 are perforated in the folds 6 where the folded portions 10 overlap, and a series of loop-shaped cloth strings 14 are passed through these holes 12. In each figure, a round cord (having a circular cross-sectional shape) is shown as the cloth cord 14, but a flat cord (having a flat cross-sectional shape) may be used instead of the round cord. In one embodiment, a cloth string 14 made of a natural material such as corn husk may be used.

Further, holes 12 and holes formed at two positions, one near the left end and the other near the right end of the rear wall 4, so that a predetermined portion of the folded portion 10 that is not perforated can be folded upward to form a flap 18. Two notches 16 are formed between the twelve.

FIG. 1B shows a state in which the flaps 18 between the notches 16 formed in the rear wall 4 of the paper bag 1 shown in FIG. 1A are folded upward.

FIG. 2 is a diagram illustrating how to use the paper bag 1 shown in FIG. The user first folds upward a predetermined unperforated portion of the folded portion 10 between the notches 16 formed in the rear wall 4 of the bag body of the paper bag 1, as shown in FIG. 2 (a). It can be a flap 18. Next, as shown in FIG. 2B, the user can close the opening 8 so that the upper ends of the front wall 2 and the rear wall 4 of the bag body of the paper bag 1 are brought into contact with each other. Subsequently, as shown in FIG. 2C, when the user folds the flap 18 downward, the flap 18 covers the opening 8 of the paper bag 1. Then, if necessary, the flap 18 can be fixed to the front wall 2 by using an adhesive tape or the like.

In another embodiment shown in FIG. 3, the engaging piece 24 formed on the flap 18 and the slit 22 formed on the front wall 2 corresponding to the engaging piece 24 are configured to be engaged with each other. The user can first fold a predetermined portion between the notches 16 formed in the rear wall 4 of the bag body of the paper bag 1 upward to form the flap 18, as shown in FIG. 3A. Next, as shown in FIG. 3B, the user can close the opening 8 so that the upper ends of the front wall 2 and the rear wall 4 of the bag body of the paper bag 1 are brought into contact with each other. Subsequently, as shown in FIG. 3C, the flap 18 is folded toward the front wall 2 so that the user inserts the engaging piece 24 formed at the center of the flap 18 into the slit 22 of the front wall 2. Then, the flap 18 is engaged, and the flap 18 covers the opening 8. Then, if necessary, the flap 18 can be fixed to the front wall 2 by using an adhesive tape or the like.

FIG. 4 shows the shapes of the notches 16 and flaps 18 in various embodiments of the present invention. In the embodiment shown in FIG. 4A, the notch 16 is diagonally formed at a predetermined position of the folded portion 10. In the embodiment shown in FIG. 4B, the left and right corners of the flap 18 are removed and rounded. Further, a notch 16 is formed at a predetermined position outside the position 7 of the valley bottom of the bag shown by the alternate long and short dash line 7 in FIG. 4 (b), whereby the opening of the bag body is closed. The flap 18 is long enough to cover at least a part of the gusset when the flap 18 is folded downward. In the embodiment shown in FIG. 4C, a part of the flap 18 is projected and is formed in a shape that can be easily grasped by fingers. In a further embodiment of the present invention, it may be formed in the shape of a notch 16 and a flap 18 other than these.

In yet another embodiment shown in FIG. 5, the flaps 48 formed on both the front wall 32 and the rear wall 34 of the paper bag 30 are configured to be able to stand up. As shown in FIG. 5A, the holes 42 formed at two locations near the left end and the right end of the front wall 32 and at two locations near the left end and the right end of the rear wall 34. Two notches 46 are formed in the folded portion 40 between the two. When a predetermined portion between these notches 46 is folded upwards, it can function as a flap 48.

FIG. 5B shows a state when the flap 48 of the paper bag 30 shown in FIG. 5A is folded upward. The notches 50 formed at the bases of these flaps 48 are configured so that the flaps 48 at each of the anterior wall 32 and the posterior wall 34 can be engaged with each other.

FIG. 6 is a diagram illustrating how to use the paper bag 30 shown in FIG. 5 (b). The user first folds the predetermined portion between the notches 46 formed in the folded portions 40 of the front wall 32 and the rear wall 34 of the bag body upward and flaps them as shown in FIG. 6 (a). It can be 48. Next, as shown in FIG. 6B, the user can close the opening 38 by bringing the flaps 48 of the front wall 32 and the rear wall 34 of the bag body of the paper bag 1 into contact with each other. .. At this time, as shown in FIG. 6C, the notch 50 of each flap 48 is used to engage the front wall 32 and the rear wall 34 with each other. Subsequently, as shown in FIG. 6D, when the user folds the flap 48 downward, the flap 48 covers the opening 38. Then, if necessary, the flap 48 can be fixed to the front wall 32 by using an adhesive tape or the like.

In the embodiment shown in FIG. 7, a perforation 76 is formed instead of a notch being formed at a predetermined position on the bag body of the paper bag 60. The portions other than the perforations 76 formed on the bag body of the paper bag 60 can be configured in the same manner as the paper bag 1 shown in FIGS. 1 to 5. The user of the paper bag 60 tears the predetermined position of the folding portion 70 along the perforation 76 as necessary on a rainy day or the like, so that the predetermined portion of the folding portion 70 that is not perforated is moved upward. It can be folded back into a flap.

In the above-mentioned methods for producing various paper bags, at least the surface of the bag body of the paper bag may be water-repellent. When at least the surface of the bag is water-repellent, it is possible to prevent water from seeping into the bag. Examples of the water repellent used for applying the water repellent treatment include the water-based OP varnish / medium series that can be procured from Fuji Ink Mfg. Co., Ltd. and Alcoat TEC20 that can be procured from Kohara of Maikon Co., Ltd. When the surface of the bag body of the paper bag is water-repellent using a water-repellent agent whose main component is a natural material, and the paper bag is made of a cloth string made of a natural material such as corn husk. Since the entire paper bag is made from natural materials, the burden on the environment of the paper bag is very small.

FIG. 8 shows a user carrying the flapped paper bag 1 of the present invention shown in FIG. 2 (c). FIG. 8A shows a user walking with a paper bag 1 in his hand, and a cloth string 14 extends from both sides of the front wall 2 and the rear wall 4.

FIG. 8B shows a user hanging the paper bag 1 on his shoulder. The user can hang the paper bag 1 on the shoulder by simply pulling the series of loop-shaped cloth strings 14 shown in FIG. 8A to one side, and at the same time, flap by the pulled cloth strings 14. 18 is pressed down and the opening 8 of the bag body is closed (see FIG. 8B).

As described above, since the flapped paper bags 1, 30 and 60 of the present invention have a cloth string passing through the hole where the folded part overlaps in the bag portion, the force from the cloth string is applied when a heavy article is stored. Even if it receives it, the paper around the hole is unlikely to tear. Further, the flapped paper bags 1, 30 and 60 of the present invention can be used in a so-called two-way manner in the sense that the user can carry them in their hands or hang them on their shoulders.

1 ... Paper bag 2 ... Front wall 4 ... Rear wall 6 ... Bag 7 ... Dashed line (position of valley bottom of bag 6)
8 ... Opening 10 ... Folding part 12 ... Hole 14 ... Cloth string 16 ... Notch 18 ... Flap 20 ... Engaging piece 22 ... Slit 24 ... Engaging piece 30 ... Paper bag 32 ... Front wall 34 ... Rear wall 36 ... Bag 38 ... Opening 40 ... Folded part 42 ... Hole 44 ... Cloth string 46 ... Notch 48 ... Flap 50 ... Notch 52 ... Engagement piece 54 ... Slit 60 ... Paper bag 62 ... Front wall 64 ... Rear wall 66 ... Bag 68 ... Opening 70 ... Folded part 72 ... Hole 74 ... Cloth string 76 ... Perforation

Claims (5)

A bag body including a front wall and a rear wall, and having a folded portion in which an open end portion of the bag body is folded inward over the entire circumference.
The folded portions overlap in the bag portion in which the side walls extending from the left and right ends of the front wall and the rear wall are valley-folded inward of the bag body together with a part of the folded portion. A series of loop-shaped cloth strings that pass through multiple holes drilled in the place,
With
In the folded portion, outside the position of the valley bottom of the gusset portion so that a predetermined portion of the folded portion that is not perforated in at least one of the front wall and the rear wall can be folded upward to form a flap. Notches or perforations are formed at the positions near the left and right ends , and further,
When the loop-shaped cloth string is pulled to one side of the bag body when the flap folded upward is further folded from the upper side to the lower side so as to cover the opening of the bag body, the said The flap is also passed through a hole formed in the front wall and the rear wall so that the flap can be pressed against the front wall or the rear wall of the bag body by the cloth string. With paper bag. The notch or perforation is formed on both the front wall and the rear wall of the bag body so that a predetermined non-perforated portion of the folded portion can be folded upward to form a flap. The paper bag with a flap according to claim 1, which is characterized. The flapped paper bag according to claim 2, wherein the predetermined portions of both the front wall and the rear wall are configured to be able to engage with each other. It is a method of manufacturing a paper bag with a flap.
A step of folding the opening end portion of the bag body including the front wall and the rear wall over the entire circumference into the inside of the bag body to form a folded portion.
A step of forming a bag by folding the side walls extending from the left and right ends of the front wall and the rear wall together with a part of the folded portion inward of the bag body.
In the above-mentioned gusset portion, a step of drilling a plurality of holes in a portion where the above-mentioned folding portion overlaps, and a step of drilling a plurality of holes.
As can be flaps folded back a predetermined portion which is not perforated out of the folds upward, valley of the gusset portion in contact Keru the folded portion in at least one of the front and rear walls of the receptacle A step of forming a notch or a perforation at a position near the left and right ends, which is a position outside the position of
A step of passing a cloth string through the above-mentioned multiple holes and forming the cloth string into a series of loops,
Only including,
The above series of looping steps
When the loop-shaped cloth string is pulled to one side of the bag body when the flap folded upward is further folded from the upper side to the lower side so as to cover the opening of the bag body, the said A series of loops are formed after passing the cloth string through the holes formed in the front wall and the rear wall so that the flap can be pressed against the front wall or the rear wall of the bag body by the cloth string. Further including a method of manufacturing a paper bag with a flap. Further forming the cuts or perforations on both the front and rear walls of the bag so that a predetermined unperforated portion of the folded portion can be folded upward to form a flap. The method for producing a paper bag with a flap according to claim 4, which comprises.

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