JP4868670B2 - Bag making machine - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a bag making method and a bag making machine for producing a plastic bag.
[0002]
[Prior art and its problems]
In a bag making machine for producing a plastic bag, a plastic film is usually superimposed on a plurality of layers and intermittently fed by a feed roller. Furthermore, every time the plastic film is intermittently fed, the plastic film is heat-sealed by a heat sealing device, and thereafter, every time the plastic film is intermittently fed, the plastic film is cut by a cutter. As is well known, a plastic bag is produced in this way.
[0003]
By the way, it is preferable that the date of manufacture of the plastic bag is determined from time to time in relation to the manufacturer liability law. Therefore, it is required to print the date of manufacture on the plastic bag, but there is a problem that the cost is high. If the date of manufacture is printed, it may be intentionally forged. The same applies not only to the date of manufacture of the plastic bag, but also to the production lot, the same applies to the bag making machine that manufactured the plastic bag, and the same applies to the other category items. In addition, after the plastic bag is manufactured, the content filling is filled in the plastic bag. The same applies to the date of manufacture of the content filling or other category items.
[0004]
OBJECT OF THE INVENTION
Accordingly, the present invention relates to a bag making method and a bag making machine for manufacturing a plastic bag by cutting the plastic film with a cutter every time the plastic film is intermittently fed. Corresponding to the item, the plastic bag can be provided with the information of the category item, its cost is low, and it is intended to prevent the forgery of the information of the category item.
[0005]
[Structure of the invention]
According to the present invention, in the bag making machine that manufactures a plastic bag by cutting the plastic film with a cutter every time the plastic film is intermittently fed, the plastic film is not completely cut, and a plurality of minute amounts are formed on the cutting line. Forming a connection part, keeping the plastic film in a partially connected state, and changing the cutting characteristics of the cutter blade for each category item such as date of manufacture, production lot, bag making machine, etc. There is provided a bag making machine characterized in that the position, size or number of minute connection portions are changed so that the plastic bag has the information of the classification items.
[0006]
Further, in the bag making machine for manufacturing a plastic bag, the plastic film is cut by the cutter every time the plastic film is intermittently fed, and when the plastic film is cut by the cutter, the opening notch of the plastic bag is cut by the cutter. A bag making machine characterized in that it is formed is provided.
[0007]
[Explanation of Examples]
Examples of the present invention will be described below.
[0008]
FIG. 1 shows a bag making machine according to the present invention. In this bag making machine, the plastic film 1 is superimposed on a plurality of layers, guided between a pair of feed rollers 2, and the plastic film 1 is intermittently fed by the feed roller 2. Furthermore, every time the plastic film 1 is intermittently fed, the plastic film 1 is heat-sealed by a heat sealing device, and a heat-sealed portion 3 is formed on the plastic film 1 as shown in FIG. Thereafter, the plastic film 1 is cut by the cutter 4 every time the plastic film 1 is intermittently fed. Thereby, the plastic bag 5 is manufactured.
[0009]
The plastic bag 5 of this embodiment is a deformed bag, and when the plastic film 1 is cut by the cutter 4 and the plastic bag 5 is manufactured, the plastic film 1 is cut into a wave shape, and the plastic bag 5 has both sides of the wave shape. It has an edge 6. Further, the side edges 6 thereof are inclined at a certain angle, and the plastic film 1 inevitably has a debris 7 between the plastic bags 5. Furthermore, in this embodiment, the opening notch 8 of the plastic bag 5 is formed by the cutter 4. The opening notch 8 is for tearing and opening the plastic bag 5.
[0010]
Further, in this embodiment, a pair of Thomson blades 9 are used as the blades of the cutter 4, and the Thomson blades 9 are arranged at intervals in the feeding direction X of the plastic film 1 and attached to the movable base 10. The film 1 is guided between the Thomson blade 9 and the cradle 11. Further, for example, the movable base 10 and the heat seal device are connected by a link mechanism, and the movable base 10 is pushed down by the link mechanism every time the plastic film 1 is intermittently fed. Pressed against the film 1, the plastic film 1 is sandwiched between the Thomson blade 9 and the cradle 11, and the plastic film 1 is cut by the Thomson blade 9. The Thomson blade 9 is curved in a wave shape. Therefore, the plastic film 1 is cut into a wave shape. Further, the Thomson blade 9 is bent at a certain point, the plastic film 1 is cut by the Thomson blade 9, and the opening notch 8 of the plastic bag 5 is formed by the bent portion.
[0011]
Furthermore, in this embodiment, the plastic film 1 is not completely cut, and a plurality of minute connection portions 13 are formed on the cutting line 12, so that the plastic film 1 is kept in a partially connected state. For example, at the edge of each Thomson blade 9, a plurality of minute recesses are formed at intervals, and when the Thomson blade 9 is pressed against the plastic film 1, each minute recess is related to the cutting state of the plastic film 1. Then, each minute connection portion 13 is formed by the minute depression. The micro-connection portion 13 is called a micro joint and is shown in an exaggerated state for convenience, but has a size of about 0.2 mm and is extremely small.
[0012]
Then, the movable base 10 is pulled up by the link mechanism, and the Thomson blade 9 moves away from the plastic film 1 and the cradle 11 and rises. Further, in this embodiment, in each Thomson blade 9, urethane rubber 14 is disposed on both sides of the Thomson blade 9 and attached to the movable base 10, and when the plastic film 1 is cut, the urethane rubber 14 is plastic film. 1 and the cradle 11 are pressed and elastically deformed, whereby the plastic film 1 is held. Thereafter, when the Thomson blade 9 moves away from the plastic film 1 and the cradle 11 and rises, the urethane rubber 14 is restored to the original state, and the plastic film 1 is pushed away from the Thomson blade 9. Therefore, the plastic film 1 sticks to the Thomson blade 9 and is not pulled up. Thereafter, the plastic film 1 is intermittently fed in a partially connected state, and the plastic bag 5 and the waste 7 are torn off at a downstream position of the cutter 4 by an appropriate mechanism.
[0013]
Further, in this bag making machine, for example, the cutting characteristics of the blade of the cutter 4 are changed every time the plastic bag 5 is manufactured, and the cutting state or cutting shape of the plastic film 1 changes. For example, the Thomson blade 9 is replaced every time the production date is changed, the cutting characteristics are changed, and the position, size, or number of the microconnecting portions 13 is changed. Thereafter, the plastic bag 5 is torn off at the minute connection portion 13 by an appropriate mechanism, and the trace of the minute connection portion 13 remains in the plastic bag 5. Therefore, the date of manufacture can be given to the plastic bag 5. Instead of replacing the Thomson blade 9, the Thomson blade 9 may be processed each time the same Thomson blade 9 is manufactured to increase the minute dent and change the size of the minute connection portion 13. . For each production date, the number of micro-recesses may be increased and the number of micro-connections 13 may be increased each time.
[0014]
Therefore, for example, in a storage or recording medium such as a computer, the position, size, or number of the minute connection portions 13 is stored or recorded for each manufacturing date. Then, in the plastic bag 5 distributed in the market, when the position, size, or number of the micro-connection portions 13 is stored or stored or recorded with the storage medium or the recorded contents, the actual date or the image is collated. Prove.
[0015]
Not only the date of manufacture of the plastic bag 5 but also the manufacturing lot, bag making machine, and other classification items, the cutting characteristics of the Thomson blade 9 are changed each time, and the position, size, or number of the microconnecting portions 13 are changed. By changing, the plastic bag 5 can be provided with information on the category items. Therefore, the position, size, or number of the microconnecting portions 13 is stored or recorded for each category item, and the position, size, or number of the microconnecting portions 13 is stored or recorded in the plastic bag 5 distributed in the market. The stored or recorded contents of the recording medium can be collated with the actual product or image, and the classification items of the plastic bag 5 can be identified as needed. Corresponding to the classification items related to the filling of the contents of the plastic bag 5, the information can be given to the plastic bag 5.
[0016]
In the case of this bag making machine, it is not necessary to print the classification items on the plastic bag 5 as in the conventional case, and the cost is low. Moreover, even if the position, size, or number of the minute connection portions 13 are changed, it is generally not noticed and there is no fear of forgery of the category items.
[0017]
Furthermore, in this bag making machine, when the plastic film 1 is cut by the cutter 4, the opening notch 8 of the plastic bag 5 is formed by the cutter 4 as described above. Therefore, it is not necessary to form the opening notch 8 in a separate process, which is preferable because the cost is low.
[0018]
【Effect of the invention】
As described above, according to the present invention, the plastic bag can be provided with information on the category items. There is no need to print the category items on the plastic bag, and the cost is low. The intended purpose can be achieved without fear of counterfeiting the category items.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of the present invention.
2 is a plan view of the plastic film and plastic bag of FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Plastic film 4 Cutter 5 Plastic bag 8 Opening notch 9 Thomson blade 12 Cutting line 13 Minute connection part

Claims (2)

Each time the plastic film is intermittently fed, the plastic film is cut by a cutter, and in the bag making machine for manufacturing the plastic bag, the plastic film is not completely cut, and a plurality of minute connection portions are formed on the cutting line, While maintaining the plastic film in a partially connected state, the cutting characteristics of the cutter blade are changed each time for each category item such as the manufacturing date, manufacturing lot, bag making machine , the position of the minute connecting portion, A bag-making machine characterized in that the plastic bag has information on the classification items by changing the size or number . When the plastic film is cut by the cutter in the bag making machine for manufacturing the plastic bag, the opening notch of the plastic bag is formed by the cutter. A bag making machine characterized by the above.

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