JP2007084153A - Multilayer type check valve device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accelerate a gas charging operation against an air packing bag, improve a packing efficiency, make a close fitting of an air valve film against an upper film through utilization of a characteristic of thin air valve film, accomplish an air-tightness and improve a disadvantage of leakage of gas after filling gas at a well-known air packing bag. <P>SOLUTION: This multilayer type check valve device has an air packing comprising an upper film 21, a lower film 22 and a plurality of check valves held between the upper film and the lower film. The multilayer type check valve device comprises a first air valve film 24, a second air valve film 25, a third air valve film 26, a plurality of heat-resistant prints arranged between the first and second air valve films, and a plurality of heat-resistant prints arranged between the second air valve film and the third air valve film. A first air feeding path is formed between the first and second air valve films and a second air feeding path is formed between the second air valve film and the third air valve film. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a multi-layer check valve device for improving packing efficiency by forming two or more air supply passages with three or more air valve membranes and accelerating gas filling. .

Examples of the related art of the air valve device used for the known air packing bag include, for example, Chinese Patent Nos. 245227 (Patent Document 1) and 363600 (Patent Document 2). The No. 245227 packing bag is provided with an air valve, and the air valve closes the air supply port with a stretched sheet. No. 363600 prevents the gas from leaking by closing the air valve with a fastener.
Taiwan Patent No. 245227 Republic of China Patent No. 363600

  However, even if the air valve opening is closed with a stretched sheet or a fastener, the structure is complicated and inconvenient to manufacture. Even if there are multiple air chambers in the packing bag and each air chamber has an independent air valve, the air valve is closed with a stretched sheet or fastener as in the conventional case, so the structure becomes more complicated and manufacturing becomes more difficult. Thus, the manufacturing cost is significantly increased.

  Further, the known air valve device has two air valve membranes, and is designed to form an air supply path in the middle. However, since there is only one air supply path, the air supply speed is slow and tends to affect the efficiency of the packaging.

  The multi-layer check valve device of the present invention mainly improves on the drawbacks of the known air valve of a packing bag, and the air packing bag has an upper film, a lower film, and an upper film and a lower film. The multilayer check valve device includes a plurality of check valves sandwiched between the first air valve membrane, the second air valve membrane, the third air valve membrane, and the first and second air valve membranes. A plurality of heat-resistant printing provided between the air valve films, a plurality of heat-resistant printing provided between the second and third air valve films, and the first air passage between the first and second air valve films. Forming a second air passage between the second and third air valve membranes to accelerate gas filling into the air packing bag. Here, heat-resistant printing corresponds to English “Anti-welding layer” and refers to a member (layer) that is not welded in the manufacturing process of heating.

  In addition, the multi-layer check valve device according to the present invention includes a multi-layer check valve device in which the air packing bag has a plurality of check valves sandwiched between an upper film, a lower film, and an upper film and a lower film. The multilayer check valve device includes three or more layers of air valve membranes and a plurality of heat resistant prints provided between the air valve membranes, and two or more air supply passages between the air valve membranes. To accelerate gas filling into the air packing bag.

  The main object of the present invention is to form two or more air passages, accelerate the gas filling of the air packing bag, and improve the packing efficiency.

  Another object of the present invention is to improve the airtight effect by utilizing the characteristics of a thin air valve membrane so that the air valve membrane can be more closely attached to the upper membrane.

  In order to explain in detail, the following examples will be described, but the examples do not limit the present invention.

  The multi-layer check valve device (20) according to the present invention includes a first air valve as shown in FIG. 1 and a cross-sectional view taken along the line 2-2 in FIG. 1 (FIG. 2). A plurality of heat resistant prints (33) provided between the film (24), the second air valve film (25), the third air valve film (26), and the first and second air valve films (24) (25), 2 and a first air passage between the first and second air valve membranes (24) and (25), and a plurality of heat resistant prints (33) provided between the third air valve membranes (25) and (26). , And a second air supply passage is formed between the second and third air valve membranes (25) and (26) to accelerate gas filling into the air packing bag. The heat-resistant printing (33) is determined according to the number of air chambers, that is, one air chamber is combined for one heat-resistant printing (33). The main purpose of providing the heat-resistant printing (33) is that the first, second, and third air valve membranes (24), (25), and (26) are used in the subsequent thermal printing process in the multilayer check valve device (20). It is possible to prevent the gas from completely adhering and to make an airway into which gas enters when the gas is filled. The thickness of one air valve membrane is only about 20 to 25 μm, and the thickness of the completed multilayer check valve device (20) is only about 60 to 75 μm.

  The completed multi-layer check valve device (20) is rolled and placed on a heating printer, and after matching the upper film (21) as shown in FIG. , Combine both. Thereafter, with the cupper cup (52), high-temperature printing of mesh-like thermal printing dots (34) is performed on the upper film (21) and the multi-layer check valve device (20), and the multi-layer check valve device ( 20) first, second and third air valve membranes (24), (25), (26) and upper membrane (21) are combined and the three layers of film are sealed together via reticulated thermal printing dots (34) . Furthermore, after the lower film (22) was put together, heat printing was performed with a third copper film (53), and the upper film (21), the multi-layer check valve device (20), and the lower film (22) were formed. Join. After that, when procedures (not shown in the figure) such as subsequent front / rear bag sealing printing, cooling shaping, bag folding by a bag folding machine, and cutting division are performed, the air packing bag (1) as shown in FIG. 4 is completed. . 4 and 4, the air-packing bag (1) includes an upper membrane (21), a lower membrane (22), and an upper and lower membrane (21) ( 22), which is composed of a multi-layer check valve device (20) having a plurality of check valves sandwiched between the air chambers (10), (10),. And the air chamber (10) are partitioned by a heat seal line (31). Since these heat seal wires (31) do not necessarily have to be installed at equal intervals, each air chamber (10) can have a different size. An air supply port (2) is provided at an appropriate location on one side of the air packing bag (1), and an air supply passage (14) is provided connected to the air supply port (2). There are paths, each connected to an air chamber (10). Therefore, when gas is introduced from the air supply port (2) of the air packing bag (1), the gas is filled in the air chambers (10), (10),... Along the air supply path (14). be able to. At this time, the multi-layer check valve device (20) is already enclosed between the upper and lower membranes (21) and (22), and the first, second, and second of the multi-layer check valve device (20). 3 The air valve membranes (24), (25), (26) and the upper membrane (21) are joined by a seal of the mesh-like thermal printing dots (34) to form an air valve device having a function of supplying and stopping air, and the multilayer type A plurality of check valves formed in the check valve device (20) are arranged one by one in each air chamber (10).

  As shown in FIG. 6, when the gas is filled from the air supply port (2) of the air packing bag (1), the gas enters each air chamber (10) along the air supply path (14). As the gas enters each air chamber (10), the reticulated thermal printing dots (34) form an air passage so that the gas smoothly enters the air chamber (10). 7 and 8 are cross-sectional views of the portion 7-7 of FIG. 5 of one air chamber (10). Since the heat-resistant printing (33) is located between the first and second air valve membranes (24) and (25) and the second and third air valve membranes (25) and (26), the air packing bag (1) is repeatedly attached. Even if the high thermal printing process is performed, the first, second, and third air valve membranes (24), (25), and (26) can be prevented from adhering to each other. 20) can be put into the air chamber (10) from the place of the heat-resistant printing (33). In the present invention, since three air valve membranes (24), (25), and (26) are provided and two air supply passages are formed, the gas filling speed can be accelerated and the packaging efficiency can be improved. . Further, as shown in FIG. 8, when the gas enters the air chamber (10), the air chamber (10) expands and forms, and when the gas filling is completed and the air supply is completed, the air chamber (10) The internal high-pressure gas pushes the three-layer film of the first, second, and third air valve membranes (24), (25), and (26) toward the upper membrane (21), and the first, second, and third air valves The membranes (24), (25) and (26) are brought into close contact with the upper membrane (21). The reticulated thermal printing dot (34) seals the upper film (21), the first air valve film (24), the second air valve film (25), and the third air valve film (26) together. When the third air valve membranes (24), (25), and (26) receive pressure, they face the upper membrane (21) rather than the lower membrane (22). The first, second, and third air valve membranes (24), (25), and (26), and the upper membrane (21) are all made of PE plastic film having a thickness of only 20 to 25 μm. When the first, second and third air valve membranes (24), (25) and (26) are brought into close contact with the upper membrane (21) by the pressure of the gas in the air chamber (10), the air supply to the air chamber (10) The mouth is closed to form an air tightness and prevent the gas in the air chamber (10) from leaking. Since the air valve membranes (24), (25), and (26) are very thin, the air valve membranes (24), (25), and (26) can be brought into close contact with each other when they are brought into close contact with the upper membrane (21). It is possible to improve the disadvantage that gas easily leaks after filling. At the same time, the reticulated thermal printing dots (34) also form a function of preventing backflow and enhance the airtight effect of the air chamber (10).

  As shown in FIG. 9, the gas filling of the air packing bag (1) is completed, the air chambers (10) are filled with the gas, expand to form, and the fold lines created in the air chamber (10). When the air-packing bag (1) is folded from the planar state into a three-dimensional state along (40), the contents can be placed in the internal space surrounded by the air chambers (10). The contents can be protected by the air chamber and can be prevented from being damaged by vibration or impact during transportation. The air supply path (14) of each air chamber (10) is in a film state because it is filled with gas and is not expanded, and therefore, the contents are aligned with the opening (50) from the opening (50). It can put in the accommodation space inside an air packing bag (1).

  In the above embodiment, two air supply passages are formed by installing three layers of air valve membranes. However, three or more air valve membranes may be installed to form two or more air supply passages. Is possible.

The multi-layer check valve device of the present invention accelerates the gas filling of the air packing bag by forming two or two or more air supply passages with three or three or more air valve membranes, and improves the packing efficiency. Improve. In addition, by utilizing the characteristics of the thin air valve membrane, when the air valve membrane is in close contact with the upper membrane, the air valve membrane can be more closely attached, the airtight effect is improved, and gas is likely to leak after gas filling of a known air packing bag Disadvantages can be improved.

  In summary, the multi-layer check valve device of the present invention forms two or more air supply passages by three or more layers of air valve membranes, accelerates gas filling into the air packing bag, and packs In order to improve the efficiency, it is adapted to industrial applicability. The multi-layer check valve device not only can greatly improve the packing efficiency, but also can improve the disadvantage that gas leaks easily after gas filling of a known air packing bag, so the effect is enhanced. There is an inventive step.

It is a top view of a part of the multilayer check valve device of the present invention. It is sectional drawing of the 2-2 part of FIG. It is a sketch of the manufacturing process which combines the multilayer type check valve apparatus of this invention with the film of an air packing bag. It is a top view when the multilayer type check valve device of the present invention is enclosed in an air packing bag and is not filled with gas. It is sectional drawing of the air packing bag of 5-5 of FIG. It is a plane sketch when filling gas from the air supply port of an air packing bag. It is sectional drawing at the time of the gas filling of one air chamber of the 7-7 part of FIG. FIG. 7 is a cross-sectional view when the gas filling of one air chamber in the portion 7-7 in FIG. 5 is completed and the air supply port is closed. FIG. 3 is a three-dimensional view of the air packing bag according to the present invention when gas filling is completed and inflated to form a shape.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air packing bag 2 Air supply port 10 Air chamber 14 Air supply path 20 Multilayer check valve device 21 Upper film 22 Lower film 24 First air valve film 25 Second air valve film 26 Third air valve film 31 Heat seal line 33 Heat-resistant printing 34 Reticulated thermal printing dot 40 Folding line 50 Opening 51 First copper pattern 52 Second copper pattern 53 Third copper pattern

Claims (8)

The air packing bag is constituted by a multi-layer check valve device having an upper membrane, a lower membrane, and a plurality of check valves sandwiched between the upper and lower membranes. By air valve film, second air valve film, third air valve film, and a plurality of heat resistant printing provided between the first and second air valve films, and a plurality of heat resistant printing provided between the second and third air valve films. A first air passage is formed between the first and second air valve membranes, a second air passage is formed between the second and third air valve membranes, and gas filling into the air packing bag is accelerated. A multi-layer check valve device characterized by 2. The multilayer check valve device according to claim 1, wherein the thickness of the first air valve membrane is relatively good at 20 to 25 [mu] m. 2. The multilayer check valve device according to claim 1, wherein the thickness of the second air valve film is relatively good at 20 to 25 [mu] m. 2. The multilayer check valve device according to claim 1, wherein the thickness of the third air valve membrane is relatively good at 20 to 25 [mu] m. 2. The multi-layer check valve device according to claim 1, wherein the multi-layer check valve device and the upper membrane are sealed together by mesh-like thermal printing dots. The air-packing bag is constituted by a multi-layer check valve device having an upper membrane, a lower membrane, and a plurality of check valves sandwiched between the upper and lower membranes. It is composed of air valve membranes of layers or more and a plurality of heat-resistant printing provided between the air valve membranes, and two or more air supply passages are formed between the air valve membranes to accelerate gas filling into the air packing bag. A multi-layer check valve device characterized by that. 7. The multilayer check valve device according to claim 6, wherein the thickness of each air valve membrane is relatively good at 20 to 25 [mu] m. 7. The multi-layer check valve device according to claim 6, wherein the multi-layer check valve device and the upper membrane are sealed together by mesh-like thermal printing dots.

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