KR20060032647A - Plastic bag with zipper - Google Patents

Abstract

A plastic bag (10D), wherein an engageable/disengageable zipper (5) having a recessed part (7) and a projected part (8) is formed on the inside of the upper portion (14) of an opened bag body formed of plastic films (11) and (12), and both side portions (13) and (13) of the bag (10D) and the lower side portion (15) are fused, cutouts (35) and (35) are formed at both end parts of the upper portion (14) for opening, the upper portion (14) of the bag (10D) is openable by the zipper (5) and can be largely opened, a plurality of chambers may be formed by binding at least one sheet of thermal fusible plastic sheet between the films (11) and (12) or by vertically fusing the films (11) and (12) through lines.

Description

Plastic bag with zipper {PLASTIC BAG WITH ZIPPER}

The present invention relates to a plastic bag with a zipper, in particular a plastic bag having a zipper that can be freely inserted or released, consisting of a concave and a convex inside the upper opening of the bag body made of a plastic film.

BACKGROUND ART [0002] A variety of plastic bags have been known in the art having a zipper formed on the inner side of the top opening of the bag body made of a plastic film and having a concave portion and a convex portion that can be freely inserted or released.

As a typical example, as shown in Fig. 13, both sides of the two plastic films 1A and 1B are welded or melted (the part hatched in Fig. 13C) is the welded portion 2. ), And the zipper 5 is installed in the upper edge opening part. As is well known (see Fig. 14), the zipper 5 is formed by integrally forming the recessed portion 7 and the convex portion 8 in the base portion 6 made of plastic.

This zipper 5 is welded in the state which the recessed part 7 and the convex part 8 were mutually fitted in the both ends 5a and 5a. Therefore, both ends 5a and 5a of the zipper 5 are held in the locked state even at the time of opening, and when resealing, the back part of the zipper 5 is sandwiched between the fingers starting from the both ends 5a and 5a. Squeeze your finger while sealing it.

By the way, in this kind of conventional plastic bag, the area (part hatched in FIG. 13B) of the opening part 3 when the zipper 5 is opened becomes considerably small. That is, the portion where the zipper 5 is installed increases the amount of resin, so that the welding area is large (see 2a in Fig. 13C), and the recesses 7 and the convex portions 8 bulge inwards. It is due to that. Therefore, the article which can enter and exit from the opening part 3 is the part in which the recessed part 7 and the convex part 8 overlap with each other at the time of opening from the dimension D2 smaller than the inner dimension Dl of the welding part 2. It was limited to what is below the width | variety D3 except the following.

Also, due to the rigidity of the zipper 5, if the length of the zipper 5 is shortened, the opening 3 cannot be sufficiently opened, and a fine bag body having a width dimension D of 40 mm or less could not actually be manufactured. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a zippered plastic bag that can accommodate a larger article than before by effectively utilizing the inner dimensions of the bag body.

Another object of the present invention is to provide a zippered plastic bag that allows entry and exit of articles even though the width thereof is smaller than in the related art.

In order to achieve the above object, the present invention, in the plastic bag having a zipper that can be freely inserted or released, consisting of a concave portion and a convex portion on the inner side of the upper opening of the bag body made of a plastic film, Both ends of the opening are characterized in that the opening.

In the plastic bag according to the present invention, since both ends of the top side opening of the bag body are open, the top side opening of the bag body can be greatly opened despite the presence of a zipper, so that the inner dimension of the bag body can be effectively made. By using this, a larger article than the conventional one can be stored. Moreover, since the rigidity of a zipper is not restrict | limited, the bag with a zipper of 40 mm or less width, for example, about 10 mm in width which was conventionally limited, can be put to practical use.

If both ends of the bag body are open, and the cord or cable is pulled out from the both ends, the cord or cable can be stored in the bag body and the electrical connection state can be maintained. The excess part can be arranged compactly.

In the plastic bag according to the present invention, since both ends of the concave portion and the convex portion of the zipper are not welded to each other, there is no starting point when the concave portion and the convex portion are fitted as in the conventional bag. Therefore, in making it fit, the concave portion and the convex portion are faced with the eyes so as to face each other, and the back portion of the zipper is pressed with a finger. If the bag body is small in width, it can be sealed by one press. If the bag body can not be sealed at one time, press the seal several times.

In addition, the plastic bag according to the present invention may include a plurality of storage chambers. For example, a plurality of storage chambers can be formed by sandwiching at least one heat-welding plastic sheet between the surface film and the back film constituting the bag body. In addition, a plurality of storage chambers can be formed by welding the front film and the back film in a line shape in the longitudinal direction.

FIG. 1: shows the state in the middle of the manufacturing process of the plastic bag which is 1st Example of this invention, (A) is a front view, (B) is sectional drawing.

FIG. 2: shows the completion state of the said plastic bag which is 1st Example, (A) is a front view, (B) is sectional drawing.

Fig. 3 shows a preparation step at the time of opening the plastic bag according to the first embodiment, wherein (A) is a front view and (B) is a sectional view.

FIG. 4: shows the open state of the said plastic bag which is 1st Example, (A) is a front view, (B) is sectional drawing.

Fig. 5 shows a plastic bag according to the second embodiment of the present invention, where (A) is a front view, (B) is a cross sectional view taken along line X-X and (C) is a sectional view taken along line Y-Y.

6 is a cross-sectional view showing an unsealed state of the plastic bag according to the second embodiment.

Fig. 7 shows an extrusion process of a plastic bag according to a third embodiment of the present invention, in which both (A) and (B) are cross-sectional views.

FIG. 8: shows the melting process of the said plastic bag of 3rd Example, (A) is sectional drawing and (B) is a front view.

Fig. 9 is a front view showing a plastic bag which is a fourth embodiment of the present invention.

Fig. 10 is a perspective view showing an example of use of the plastic bag according to the fourth embodiment.

Fig. 11 is a perspective view showing an open state of the plastic bag according to the fourth embodiment.

12 is a front view showing a plastic bag according to the fifth embodiment of the present invention.

Fig. 13 shows a conventional plastic bag, (A) is a top view with the zipper closed, (B) is a top view with the zipper open, and (C) is a front view.

It is explanatory drawing of the zipper which consists of a recessed part and a convex part.

EMBODIMENT OF THE INVENTION Hereinafter, the Example of the plastic bag with a zipper which concerns on this invention is described with reference to an accompanying drawing.

(First embodiment, see FIGS. 1 to 4)

1 to 4 show a zippered plastic bag 10A according to the first embodiment of the present invention.

As shown in FIG. 1, the bag 10A is first welded as shown by hatching the edges of both sides 13 and 13 and the top side 14 of the two plastic films 11 and 12. FIG. It is made of a bag body.

As the films 11 and 12, a composite material obtained by laminating one weldable material or at least an inner weldable material on the inner surface side may be used. Moreover, the zipper 5 which shape | molded the recessed part 7 and the convex part 8 integrally with the plastic base part 6 in the inner surface of the upper side part 14 of the films 11 and 12 is described in detail. 14) is welded. In addition, the zipper 5 may be molded integrally with the films 11 and 12.

In a conventional plastic bag with a zipper, both sides 13 and 13 are welded to an upper side portion 14 on which a zipper 5 is provided, but in the bag 10A according to the present invention, both sides 13 The upper regions 13a and 13a of 13 are non-bonding parts.

The sewing machine 16 and the small cutout 17 are formed in the upper side portion 14 of the bag 10A. The sewing scale 16 is for cutting out the welded portion of the upper edge portion 14 when the bag 10A is opened, and the cutout portion 17 is a portion that starts cutting.

A receptacle P is inserted from the lower side portion 15 opened to the bag 10A shown in FIG. 1, and the lower side portion 15 is welded, as shown by hatching in FIG. 2. In this way, the upper regions 13a and 13a are opened to complete the zippered plastic bag 10A.

On the other hand, as a user, the bag 10A including the storage object P is received in the state shown in FIG. When taking out the storage object P from this bag 10A, as shown in FIG. 3, the welding part of the upper side part 14 is cut along the sewing machine graduation 16, and the bag 10A is opened.

Next, as shown in FIG. 4, the upper portion 14 is opened to both sides by releasing the fitting of the recess 7 and the convex portion 8 of the zipper 5. In this way, the top edge part 14 of the bag 10A is turned outward and largely opened. In this state, the storage object P which the upper end part protruded from the upper side part 14 can be easily taken out, and can also be accommodated again.

As described above, the bag 10A of the first embodiment is opened at both ends of the upper edge portion 14 as a non-adhesive portion, so that the bag 10A can be greatly opened despite the existence of the zipper 5 (see FIG. 4). ), Entry and exit of the storage P having a width substantially equal to the inner dimension DI of the bag 10A is enabled.

In addition, in the past, when the width D of the bag was small, it was difficult to open the upper side portion 14 due to the rigidity of the zipper 5, but in the bag 10A, the width D was about 10 mm. Even if this can happen.

In addition, in this bag 10A, the welded part and the sewing machine graduation 16 provided in the upper side part 14 are not necessarily required, and may be abbreviate | omitted. Moreover, if a small hole is formed in the welding part of the upper side part 14, it can be used as a display bag for hanging goods and displaying.

(Second embodiment, see Figs. 5 and 6)

5 and 6 illustrate a zippered plastic bag 10B according to a second embodiment of the present invention.

This bag 10B is basically configured like the bag 10A shown in the first embodiment as shown in FIG. Therefore, the same reference numerals are given to members and the same parts as in Figs. 1 to 4, and redundant descriptions are omitted.

The characteristic point of this bag 10B is that at least one heat-welding plastic sheet 18 is sandwiched between the films 11 and 12 of the front and back, and at least two insides of the bag 10B are provided. It is in the point divided by the storage chambers 19a and 19b. As this sheet 18, a plastic film, a nonwoven fabric, a foamed plastic sheet, or the like can be used.

Fig. 6 shows a state where the upper side portion 14 of the bag 10B is opened, and is located above the zipper 5 (concave portion 7 and convex portion 8) in which the upper end of the seat 18 is folded back. In this case, the storage objects can be separately entered into the storage chambers 19a and 19b from the large openings 20a and 20b. This bag 10B can be used, for example, as two CD storage bags. When a nonwoven fabric or a foamed plastic sheet is used as the sheet 18, the sheet 18 also acts as a cushioning material for the CD. Moreover, you may use the transparent films 11 and 12 of the body of the bag 10B as a printing surface.

(Third Embodiment, see Figs. 7 and 8)

7 and 8 show a manufacturing process of the zippered plastic bag 10C of the third embodiment of the present invention.

First, as shown in Fig. 7A, the plastic film 30 is extruded from a die (not shown) into a tubular shape, and the recesses 7 and the convex portions 8, which constitute a zipper, are formed. ) Are simultaneously extruded to integrally protrude to the inner surface of the film 30. By adjusting the amount of resin extruded from the die and the amount of air blown into the tube, the size of the bag and the thickness of the film 30 are determined. Next, the film 30 is folded so that the recessed part 7 and the convex part 8 may oppose (refer FIG. 7 (B)).

Thereafter, the folded film 30 is melted by a dashed-dotted line H while conveying one step G in one direction (see arrow F) as shown in FIG. 8 (B). . In the film 30, the cut-out display portion 31 is formed on the upper edge portion 14 as a pre-step of melting, and the portion is removed. The cut display portion 31 is formed to open both ends of the upper edge portion 14. In addition, you may form the sewing machine graduation in the upper side part 14.

The zippered plastic bag 10C produced in the above step has the same configuration as that of the bag 10A shown in the first embodiment, and its effect is the same as that of the bag 10A.

(Fourth embodiment, see FIGS. 9 to 11)

The zippered plastic bag 10D according to the fourth embodiment of the present invention is to be used as a storage bag for cords and cables of electrical products such as TVs, PCs, and audio.

That is, as shown in Fig. 9, this bag 10D is basically the same configuration as the bag 10A shown in the first embodiment, and is common to the same members and parts as in Figs. It adds a code | symbol and abbreviate | omits duplicate description.

The characteristic point of this bag 10D is that it is an opening part by forming the comparatively large notch part 35 in the both ends of the upper edge part 14. As shown in FIG. Therefore, this bag 10D can open the upper side portion 14 considerably as shown in FIG.

Surplus cords and cables enter the rear of TV, PC, and audio, and they are left undisturbed. Thus, as shown in FIG. 10, the middle portion of the excess cord and cables is accommodated in the bag 10D and drawn out from the cutout 35, thereby maintaining the electrical connection state of the cords and cables. It can be compactly processed.

Moreover, the small hole 36 is formed in the welding part of the lower side part 15 of this bag 10D. This small hole 36 is for hanging the bag 10D by hanging on the pillar or the projection of the wall.

On the other hand, in the bag 10D, if the lower side portion 15 is a conventionally known gadget, the bottom portion can be configured widely.

(Fifth Embodiment, see FIG. 12)

Fig. 12 shows a zippered plastic bag 10E according to the fifth embodiment of the present invention.

This bag 10E is basically configured like the bag 10A shown in the first embodiment. Therefore, the same code | symbol is attached | subjected to the member and the same part as FIG. 1-4, and the overlapping description is abbreviate | omitted.

The characteristic point of this bag 10E is that the film 11 and 12 of the front and back form line-shaped welding parts 41 and 41 (hatched part) in the longitudinal direction, and are independent of the bag 10E. Two storage chambers 42a, 42b, and 42c.

The effect of the bag 10E is the same as that of the bag 10A, and independent storage chambers 42a, 42b, and 42c can be divided and used.

(Other embodiment)

On the other hand, the zippered plastic bag according to the present invention is not limited to the above embodiment, it can be changed in various ways within the scope of the gist.

In particular, the cross-sectional shape of the convex portion or the concave portion formed in the base portion of the zipper is arbitrary. Regarding the bag body, the bag manufacturing method can be any size and can be made into an appropriate size suitable for a use.

In addition, the second embodiment and the fifth embodiment can be combined to form a plastic bag provided with a larger number of storage chambers.

According to the present invention as described above, it is possible to effectively use the inner dimensions of the bag body to accommodate a larger article than before, and to provide a zippered plastic bag that allows entry of articles even if the width is small.

Claims (6)

In a plastic bag having a zipper on the inner side of the top opening of the bag body made of plastic film, which can be freely inserted or released, which is a concave part and a convex part, The bag body is welded or melted at least on both sides thereof, A plastic bag, characterized in that the area where both ends of the zipper are positioned as both sides of the bag body is a non-adhesive part. In a plastic bag having a zipper on the inner side of the top opening of the bag body made of plastic film, which can be freely inserted or released, which is a concave part and a convex part, The bag body is welded or melted at least on both sides thereof, A plastic bag, characterized in that an area in which both ends of the zipper are located as cutouts on both sides of the bag body. The plurality of storage chambers according to claim 1 or 2, wherein at least one thermally adhesive plastic sheet is sandwiched between the surface film and the backside film constituting the bag body. Plastic bag.  4. The plastic bag according to claim 3, wherein the heat-sealable plastic sheet is a nonwoven fabric or a foamed plastic sheet. 4. The plastic bag according to claim 3, wherein the upper edge opening side end portion of the heat-sealable plastic sheet sandwiched therebetween is positioned outside the zipper when the upper edge opening is opened. The plastic bag according to claim 1 or 2, wherein a plurality of storage chambers are formed by welding the surface film and the back film constituting the bag body in a line shape in the longitudinal direction.

Images