JP2002224994A - Processing device for plastic bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To open a plastic gab by tearing it with accuracy. SOLUTION: In the plastic bag composed of dual layered plastic film, at least either one layered plastic film is cut in a certain depth from outside. The bag is teared along the half cut line 5 to open the bag.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for processing plastic bags.

[0002]

2. Description of the Related Art In the case of a plastic bag, it is necessary to tear and open the plastic bag by hand when taking out the filling material. However, it is often difficult to tear and open the bag properly. Is what you experience everyday.

[0003]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to properly tear and open a plastic bag.

[0004]

According to the present invention, an apparatus for processing a plastic bag having a special structure is newly provided. In a plastic bag comprising a plastic film laminated on two layers, at least one of the plastic films of each layer is provided. The plastic film of the layer is half-cut with a certain depth from the outer surface, and the plastic bag is torn and opened along the half-cut line.

[0005] The processing device has a cutting blade and a stop surface, the cutting blade having a length corresponding to the half-cut line, extending along the stop surface and slightly projecting from the stop surface. The protrusion amount is smaller than the thickness of the single-layer plastic film. Then, the cutting blade and the stop surface are pressed against the outer surface of the plastic film, and the plastic film is half-cut by the cutting blade.

In a preferred embodiment, a pair of cutting blades are combined with a pair of stop surfaces, each cutting blade facing each other, and each stop surface facing each other. Then, the plastic bag is guided between the cutting blades, the cutting blade and the stop surface are pressed against the outer surface of the plastic film on both sides in the thickness direction of the plastic bag, and the plastic film is half-cut by the cutting blade.

Further, it is preferable that an auxiliary blade is provided at one end or both ends of the cutting blade, and the plastic film is cut off by the auxiliary blade to form a notch.

Furthermore, when a laminate film is used for the plastic film, the outer surface is formed by the gas barrier layer, and the plastic film is half-cut by the cutting blade, the half-cut line
The gas barrier layer preferably penetrates the other layers and is partially left behind.

Preferably, the cutting blade comprises a Thomson blade.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.

FIG. 1 shows an apparatus for processing a plastic bag according to the present invention. As shown in FIG. 3, the plastic bag has a rectangular shape, is made of a plastic film 1 superposed in two layers, and has both side edges 2 and both side edges 3.
Further, the plastic films 1 of both layers are heat-sealed along one edge 2 and both side edges 3, and after filling of a filler such as a beverage, the plastic films 1 of both layers are sealed with the other side edge 2.
, Thereby forming a heat-sealed region 4.

In this apparatus, at least one of the plastic films 1 of each layer is half-cut with a certain depth from the outer surface. Torn along and open. Therefore, the plastic bag can be properly torn and opened.

In this embodiment, the half-cut line 5 is formed parallel to one edge 2, extends along the heat seal area 4, and reaches the heat seal area 4 on one side edge 3. Further, the plastic film 1 is cut off at the position of one side edge 3, and a notch 6 is formed. The position is on an extension of the half cut line 5. Therefore,
The notch 6 can tear and open the plastic bag, which is preferred.

With respect to the configuration of the device of FIG. 1, the device has a cutting blade 7 and a stop surface 8, the cutting blade 7 having a length corresponding to the half-cut line 5 and extending along the stop surface 8. , Slightly projecting from the stop surface 8. The protrusion amount P is smaller than the thickness T of the single-layer plastic film 1. In this embodiment, a stop surface 8 is formed in a holder 9 of the cutting blade 7, and the cutting blade 7 is housed in a housing groove 10 of the holder 9 and slightly projects from the stop surface 8. The stop surface 8 has a constant width and is formed on both sides of the cutting blade 7. A Thomson blade may be used for the cutting blade 7.

Further, in this embodiment, as shown in FIG. 2, an auxiliary blade 11 is provided at one end of the cutting blade 7. The auxiliary blade 11 is integral with the cutting blade 7 and protrudes from the stop surface 8 by a certain amount.

Further, a cylinder is used as an operating means of the cutting blade 7, and a holder 9 is connected to the cylinder. The holder 9 is operated and moved by the cylinder on one side in the thickness direction of the plastic bag. The holder 9 moves toward the outer surface of the plastic film 1.

Therefore, the cutting blade 7 and the stop surface 8
Is pressed against the outer surface of the plastic film 1, the plastic film 1 is half-cut by the cutting blade 7, and the half-cut line 5 is formed. At the same time, the plastic film 1 is cut off by the auxiliary blade 11 and the notch 6 is formed. Thereby, the plastic bag of FIG. 3 is obtained.

In this embodiment, the wedge member 12 is built in the holder 9, and the wedge member 12 is
, The cutting blade 7 is moved, and the amount of protrusion P can be adjusted.

FIG. 4 shows another embodiment. In this embodiment, a pair of cutting blades 7 are combined with a pair of holders 9,
Each cutting blade 7 is combined with a pair of stop surfaces 8.
Oppose each other, and the respective stop surfaces 8 oppose each other. And a plastic bag is guided between each cutting blade 7,
On both sides in the thickness direction of the plastic bag, the holder 9 is operated and moved by the cylinder. Therefore, in both layers of the plastic film 1 of the plastic bag,
Cutting blade 7 and stop surface 8 are plastic film 1
And the cutting edge 7 cuts the plastic film 1 in half. The positions oppose each other and are aligned.

The apparatus shown in FIG. 4 has a pair of stoppers 14, each stopper 14 is connected to each holder 9, and the stoppers 14 are opposed to each other and are arranged at an interval C1. It is smaller than the interval C2 between the blades 7, and the difference is larger than the depth at which the plastic films 1 of both layers are half-cut. Therefore, when there is no plastic bag, even if the holder 9 moves due to malfunction, the cutting blades 7 do not contact each other, and the cutting blades 7 are not damaged. When the holder 9 moves due to a malfunction, the stoppers 14 engage with each other, and the stoppers 14 protect the cutting blade 7 and prevent the cutting blade 7 from being damaged.

When one of the cutting blades 7 in FIG. 4 is provided with an auxiliary blade 11 at one end thereof, the plastic film 1 is cut by the auxiliary blade 11 similarly to the embodiment of FIG.
Notch 6 can also be formed.

In the embodiment shown in FIG. 1 or FIG. 4, auxiliary blades 11 are provided at both ends of the cutting blade 7, and as shown in FIG.
The plastic film 1 may be cut off at the positions of the side edges 3 so that the notch 6 is formed.

Further, as shown in FIG. 6, the half-cut line 5 extends obliquely at the corner between the edge 2 and the side edge 3 so as to reach the heat seal area 4 between the edge 2 and the side edge 3. Good. The notch 6 may be formed by cutting the plastic film 1 at the position of the edge 2 or the side edge 3. In the heat-sealing area 4 at the edge 2 or the side edge 3, it is punched out by a punch to form a round hole 15 at one or both ends of the half-cut line 5. However, it may not be accidentally torn off.

As shown in FIG. 7, at the corners of the end edge 2 and the side edge 3, a bulging spout is formed by the heat sealing area 4, and a half-cut line 5 extends across the bulging spout. In, the plastic bag may be torn along the half-cut line 5 and opened.

As shown in FIG. 8, a laminate film is used for the plastic film 1 and the outer surface is often formed by the gas barrier layer 16. The gas barrier layer 16 is made of a film having a gas barrier property such as a PET film, and is laminated on another layer 17. Another layer 17 is made of a sealant film such as an LLPE film. Another layer 17 may be constituted by a metal foil and a sealant film. In this case, when the plastic film 1 is half-cut by the cutting blade 7, the gas barrier layer 16
Can penetrate into the other layer 17 and be left partially, so that the gas barrier property thereof is not impaired.

[0026]

As described above, according to the present invention, the plastic bag can be accurately torn and opened, and the intended purpose can be achieved.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of the cutting blade of FIG. 1;

FIG. 3 is an explanatory view of the plastic bag of FIG. 1;

FIG. 4 is a side view showing another embodiment.

FIG. 5 is an explanatory view showing another embodiment.

FIG. 6 is an explanatory view showing another embodiment.

FIG. 7 is an explanatory diagram showing another embodiment.

FIG. 8 is an explanatory view showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plastic film 5 Half cut line 6 Notch 7 Cutting blade 8 Stop surface 11 Auxiliary blade 16 Barrier layer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B65D 65/28 B65D 65/28 F-term (Reference) 3C060 AA04 BA07 BB01 3E056 AA05 DA01 FD03 FD04 GA03 3E075 BA68 BB14 CA01 DB03 DB07 DB19 GA02 3E086 AA02 AB03 AC13 AC15 AD01 BA02 BA04 BA13 BA15 BB01 DA07

Claims (5)

[Claims] 1. A plastic bag made of a plastic film laminated on two layers, wherein at least one of the plastic films of the respective layers is half-cut with a certain depth from an outer surface, and the plastic bag is removed. What is claimed is: 1. A device for processing a plastic bag, which can be torn along a half-cut line and opened, comprising a stop surface, a length corresponding to the half-cut line, extending along the stop surface, and the stop. A cutting blade that projects slightly from the surface, the amount of protrusion of which is smaller than the thickness of the single-layer plastic film, and means for pressing the cutting blade and the stop surface against the outer surface of the plastic film. Half cut plastic film And a plastic bag processing apparatus. 2. A pair of said cutting blades is combined with a pair of said stop surfaces, said respective cutting blades face each other, said respective stop surfaces face each other, and said plastic bag is located between said respective cutting blades. Guided, on both sides in the thickness direction of the plastic bag, the cutting blade and the stop surface are pressed against the outer surface of the plastic film, and the plastic film is half-cut by the cutting blade. Item 3. The processing apparatus according to Item 1. 3. An auxiliary blade is provided at one end position or both end positions of the cutting blade, and the plastic film is cut by the auxiliary blade to form a notch. The processing apparatus according to item 1. 4. A laminate film is used for the plastic film, the outer surface is formed by a gas barrier layer, and when the plastic film is half-cut by the cutting blade, the gas barrier layer is formed at a half-cut line. The processing apparatus according to any one of claims 1 to 3, wherein the cutting device cuts into another layer and is partially left. 5. The processing apparatus according to claim 1, wherein said cutting blade comprises a Thomson blade.