JP3273344B2 - Bag with synthetic resin chuck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag with a synthetic resin chuck having a male / female occlusal type chuck in an opening and bonded to a V-shaped horizontal gusset on both sides. .

[0002]

2. Description of the Related Art A bag with a synthetic resin chuck in which male and female occlusal type chucks are provided inside the opening of a bag and V-shaped lateral gussets are bonded to both sides is disclosed in, for example, Japanese Patent Laid-Open Publication No. 97151.

[0003]

A bag with a synthetic resin chuck having the above-mentioned known horizontal gusset has a length dimension such that the upper edge of the horizontal gusset is located below the chuck, and the upper end of the horizontal gusset is opened. The structure is such that the edges are bonded and sealed along the edges, and there is an advantage that the opening width of the opening of the bag body can be increased over the entire width.

However, the opening of the large opening bag state, and are not being limited to the vicinity, i.e., when opening the opening of the bag body, the opening of the above the chuck of the bag body Although a large opening area is obtained, the upper end edges of the lateral gussets on both sides protrude into the opening area, which interferes with the contents when the contents are taken in and out, so that the contents can be smoothly taken in and out. Inhibits. In order to avoid this interference, the prior art proposes to narrow the upper edge of the horizontal gusset, but according to this method, it is unavoidable to reduce the capacity for storing the contents.

[0005] An object of the present invention is to provide a bag with a synthetic resin chuck provided with a horizontal gusset in which the opening of the bag can have a large opening width over the entire width and a large storage volume of contents can be obtained. In addition, the upper edge of the horizontal gusset does not interfere with the contents when the contents are taken in and out, and enables smooth insertion and removal like a normal flat bag with a chuck without the horizontal gusset.

[0006]

In order to achieve the above-mentioned object, the present invention provides a male-female occlusal type having a heat-adhesive resin layer on the inner surface thereof. A zipper is provided, on both sides of the bag body, a lateral gusset folded in a V-shape with an inner surface formed of a resin film having a thermal adhesive property with an inner surface of the body film, with an outer surface inward, The upper edge of the horizontal gusset is adhered to a length dimension located below the chuck, and the upper edge of the horizontal gusset is brought close to one of the inner surfaces of the two front and rear body films, and the inside of the body film is removed. A seal tape having thermal adhesion to the side surface and the inner surface of the lateral gusset , the chuck and the lateral gusset
The upper edge of the horizontal gusset including the upper edge of the gazette or its periphery
The sides are covered and bonded.

[0007]

According to the above configuration, the sealing tape is used for covering and contacting.
Upper edge of the wear by lateral gusset is disposed under the chuck, and either one of the front and back sheets of the body film, i.e., to adhere only to the inside surface of one side of the body portion the film, opening the bag body When the opening is opened, the opening has an opening width over the entire width, and the upper edge of the horizontal gusset does not interfere with the contents when the contents are taken in and out. Like the bag, it can be smoothly put in and out, and a large storage volume of the contents can be obtained.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of the present invention.
1 is a bag formed of two films, a front body film 1a and a back body film 1b, 2 is an opening, 3 is a chuck provided along the opening 2, and 7 is a chuck of the chuck 3. The opening notch is formed on both sides (or one side) of the opening 2 so as to correspond to the planned tear line 6 that is drawn parallel to the chuck 3 at an upper portion. Note that the notch 7 for opening is not necessarily engraved, and a scissor mark and an explanation print of "Please cut from here" may be applied to one end of the scheduled tear line 6. In addition, an open state that does not require cutting or cutting may be used.

Reference numeral 4 denotes a horizontal gusset obtained by folding a film into a V-shape, and is bonded to both sides 5 of the bag 1. The horizontal gusset 4 has a folding ridge line 4a parallel to a line of the side 5 of the bag body 1 and an upper edge 4b of the horizontal gusset 4 having a length positioned below the chuck 3 and has a length dimension. As shown in FIG. 1 , the upper edge 4b has a structure in which the upper edge 4b is bonded only to the inner surface on the side of the front body film 1a. In this embodiment, the horizontal gusset 4
Of the upper edge 4b only on the inner surface of the front body film 1a side
About the bonding 4c, the inside surface and the side of the body film
With a sealing tape 8 having thermal adhesion to the inner surface of the gusset
Including the space between the upper edge 4b of the chuck 3 and the horizontal gusset 4
The upper edge 4b of the horizontal gusset 4 or its periphery is covered and bonded.
It is characterized by. This sealing tape 8 is shown in FIG.
To the entire width L2 of the bag 1 including the side 5
Or the upper edge of the horizontal gusset 4 as shown in FIG.
Use a short tape to cover and bond only the part 4b and its surroundings
Is also good. In addition, it may be adhered only to the inner surface on the side of the back body film 1b.
In this case, the adhesive is applied to only one of the sides a and 1b.

Further, this embodiment is constituted by the following multilayer film in view of facilitation of production. That is, the front and back torso films 1a, 1b, as shown in Figure 3, has a double layer structure by an outer film 10a and an inner film 10 b, also lateral gusset 4 5, 6
As shown in FIG. 7 , the outer film 11a and the inner film 11b have a multilayer structure.

[0011] and, before the torso off I Lum that make up the inside
Serial inner film 10b and the inner film 11b in the lateral gusset is, 10b and 10b respectively, or 10b and 11b
Mutually thermoadhesive good resin layer, (hereinafter abbreviated as LDPE) such as low density polyethylene, polypropylene,
Ethylene vinyl acetate copolymer (hereinafter abbreviated as EVA)
The outer film 10a of the torso film and the outer film 11a of the horizontal gusset which constitute one outer side
Is made of, for example, polyester (hereinafter abbreviated as PET), polyamide, paper, aluminum foil, or other heat-resistant, air-proof, or light-shielding material that does not heat-bond under the same conditions as the film forming the inside. It is formed of a single-layer or multi-layer material selected to impart desired performance such as fragrance retention and mechanical strength to the packaging bag.

[0012] Also the sealing tape 8 is 4 and as shown in Figure 5, while the one side 8a high melting point has a thermally adhesive, for example linear low density polyethylene (hereinafter LLDPE
The other one side 8b is the one side 8a
The inner layer 11b of the horizontal gusset 4 and the inner film 10b of the front body film 1a have a lower melting point than that of the side gusset 4 and have good thermal adhesiveness, such as EVA or LDPE.

The multilayer structure of the front and back body films 1a and 1b, the horizontal gusset 4, and the seal tape 8 fuses and bonds the films having good thermal adhesiveness to each other in the area where thermal bonding is required. The parts that must not be adhered are not adhered under the conditions.

That is, as shown in FIG. 3 , the side 5 of the bag body 1 is fused and bonded to each other by a film having good thermal adhesiveness of the inner film 10b, and as shown in FIG. Side 5 of bag 1 with end interposed
Then, the front film 1a side is the inner film 10b of the front body film 1a, and the inner film 11b of the horizontal gusset 4.
Are fused and bonded together.

On the back body film 1b side, the inner film 10b of the back body film 1b and one surface 8a of the sealing tape 8 are fused and bonded, and the other one surface 8b of the sealing tape 8 and the side gusset 4 The inner film 11b and the inner film 10b of the front body film 1a are fused and bonded, and the contact portion of the outer film 11a of the horizontal gusset 4 is not bonded. Note that the present invention is not limited to the above embodiment.
Not.

Further , as shown in FIG.
The upper edge 4b is in contact with the front body film 1a on the side where the upper edge 4b is adhered.
The horizontal gusset film to the upper edge 4b of the horizontal gusset 4
To the both sides 5 of the bag 1 to the front body film 1a
Although the oblique bonding 4d may be used, the oblique bonding 4d is shown in FIG.
Thus, the inner film 11b of the horizontal gusset 4 is
It is fused and bonded to the inner film 10b on the film 1a side.

FIG . 2 shows a state in which the bag 1 according to the embodiment of the present invention shown in FIG. 1 is swelled by the contents, and the horizontal gusset 4 expands to fulfill its function. In this case, Yokoga
The adhesive strength of the upper edge 4b of the horizontal gusset 4 to the inner surface on the side of the front body film 1a is secured by the seal tape 8 covering and bonding the upper part of the jet 4, and the diagonal adhesive 4d is used to secure the portion by the seal tape 8. Alleviates stress concentration. In addition, the oblique bonding 4d allows the front body film 1
a and the triangular corner gap between the upper edge 4b of the horizontal gusset 4
When removing contents, especially powder, etc.
Prevents removal from entering the toner gap
I do.

Therefore, the upper edge 4b of the horizontal gusset 4 is
The opening 2 of the bag 1
Opens greatly over its entire width. Besides, horizontal gaze
As shown in FIGS. 1 and 2, the upper edge 4 b of the
The adhesive 4c is adhered only to the inner surface on the film 1a side.
The upper edge 4b of the horizontal gusset 4 is bonded to the front body
Outer body film 1a side biased toward the inner surface side of film 1a side
Is located parallel to the inside surface of the
The open state is the same as a flat bag with a lock, and the contents are
Smooth in / out without interference with the upper edge 4b of the unit 4
Is obtained .

[0019]

As described above, according to the present invention, the upper edge of the horizontal gusset is stopped at a position below the chuck at the opening of the bag body, and the upper edge of the horizontal gusset is placed on either one of the front and back body films. Align to the inner surface and use the sealing tape to
Since the upper part of the gusset is covered and bonded,
At the upper edge of the body is adhered only to the inner surface of the body film on one side, when opening the opening of the bag,
The opening has an opening width over the entire width, and the upper edge of the horizontal gusset does not interfere with the contents when the contents are taken in and out, so that it is as smooth as a normal flat bag with a horizontal gusset without a gusset. It can be taken in and out, and a large storage volume of the contents can be obtained.

Further, a seal for covering and bonding the upper part of the horizontal gusset is provided.
The tape on the upper body edge of the horizontal gusset
Adhesive strength to the inner surface on the lum side is secured,
Accordingly, peeling and tearing of the bag from the portion is prevented as much as possible .

As described above, since the upper edge of the horizontal gusset does not interfere with the contents when the contents are taken in and out, the folding width of the horizontal gusset is adjusted to be relatively large to further increase the accommodation volume. It can be increased.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a bag of the present invention.

FIG. 2 is a perspective view of the bag body of FIG . 1 in an inflated state.

FIG. 3 is an enlarged sectional view taken along line BB of FIG . 1;

FIG. 4 is an enlarged sectional view taken along line CC of FIG . 1;

FIG. 5 is an enlarged sectional view taken along line DD of FIG . 1;

FIG. 6 is an enlarged sectional view taken along line EE of FIG . 1;

FIG. 7 is an enlarged sectional view taken along line FF of FIG . 1;

FIG. 8 is a front view showing a modification of the bag of FIG . 1;

[Explanation of symbols]

REFERENCE SIGNS LIST 1 bag 1a front body film 1b back body film 2 opening 3 chuck 4 side gusset 4a ridge 4b upper edge 4c bonding 4d diagonal bonding 8 seal tape 8a one side of LLDPE with high melting point 8b one side of EVA with low melting point 10a PET 10b LDPE inner film (torso film) 11a PET outer film (horizontal gusset) 11b LDPE inner film (horizontal gusset)

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65D 33/25 B65D 30/02 B65D 30/16

Claims (1)

(57) [Claims] 1. A male / female occlusal type chuck is provided inside an opening of a bag body of two front and rear body films having a heat-adhesive resin layer on the inner surface, and the inner surface is provided on both sides of the bag body. A resin film having thermal adhesiveness to the inner surface of the body film, a horizontal gusset folded in a V-shape with the outer surface inward, and a top end edge thereof is bonded to a length dimension lower than the chuck. And, the upper edge of this horizontal gusset is brought to either one of the inner surfaces of the front and back two body films, and a sealing tape having thermal adhesiveness to the inner surface of the body film and the inner surface of the horizontal gusset , The chuck and horizontal gaze
The top edge of the horizontal gusset, including between the top edges of
A bag with a synthetic resin chuck characterized by being coated and adhered.