CN101357705B - Reverse air stop valve and air sealing device with same - Google Patents

Abstract

An air sealing device with a reverse air stop valve comprises two outer membranes and at least one closed air chamber formed in the outer membranes, wherein the reverse air stop valve is arranged in the air chamber; the second outer film is provided with a first heat sealing line which divides the air chamber into an inflation area and an air storage area, and the air storage area is filled to form an air column; the reverse air stop valve comprises two inner membranes, at least one piece of heat-resistant material coated between the two inner membranes, at least one annular heat sealing line for heat sealing the two inner membranes, at least one first air inlet and at least one second air inlet; the annular heat sealing line is positioned in the air storage area; the heat-resistant material penetrates through the first heat-sealing line and the annular heat-sealing line, at least one first air inlet is formed at the intersection of the heat-resistant material and the first heat-sealing line, and at least one second air inlet is formed at the intersection of the heat-resistant material and the annular heat-sealing line; the two inner films and the heat-resistant material extend from the gas filling area to the gas storage area; the air column comprises a curved surface area and a cylindrical surface area, and when the air in the air column presses the two inner membranes, a plurality of folds are formed on the two inner membranes in the curved surface area; the two inner membranes of the cylindrical area are smoothly attached to one outer membrane.

Description

Reverse air stop valve and air sealing device with the reverse air stop valve

technical field

The invention relates to a reverse air stop valve and an air sealing device with the reverse air stop valve, in particular to a reverse air stop valve capable of strengthening the airtight effect and an air sealing device with the reverse air stop valve.

Background technique

The traditional way of cushioning packaged items is to wrap the outer periphery of the item with bubble paper to achieve shock absorption and cushioning effect. However, the shock absorption capacity of bubble paper is limited and cannot withstand large vibrations or impacts. Therefore, a resin film is developed. Gas packaging bags made of materials.

As shown in Figure 1A and Figure 1B, the gas packaging bag is a sealed body composed of two outer films A161 and A162 made of soft resin and can be filled with air inside, and an air valve is installed between the two outer films A161 and A162 A14, and the air valve A14 will form the air passage A143 between the upper air valve film A141 and the lower air valve film A142 by partially bonding after stacking the opposite upper air valve film A141 and the lower air valve film A142. When inflated, the gas enters the air chamber A13 from the air passage between the upper air valve film A141 and the lower air valve film A142 to inflate and expand, and the gas in the air chamber A13 squeezes the upper air valve film A141 and the lower air valve film A142 The gas is automatically stopped, but it cannot prevent the gas from flowing backward through the original air passage A143, so the gas packaging bag cannot be closed for a long time.

Please refer to Figure 2A and Figure 2B, in the gas packaging bag A10, after the upper air valve film A141 and the lower air valve film A142 are superimposed, they are pre-heat sealed on the outer film A161, so that the air valve A14 is attached to the outer film A161, The guide parts A144, A145, A146, and A147 are heat-sealed in the air passage to guide the gas to flow to the air chamber A13, and increase the difficulty of gas flowing backward through the air passage. This kind of structure can be seen in Taiwan Invention Patent Publication No. 587049 "Mounting structure of on-off valve of sealing body and manufacturing apparatus of sealing body having on-off valve".

As shown in Figure 3, the gas packaging bag A10 is inflated to form a cylinder, and the upper air valve film A141 and the lower air valve film A142 cannot be completely attached to the outer film A161, while the upper air valve film A141 and the lower air valve film A142 The corrugation A148 is formed, so that the gas in the air chamber A13 passes through the corrugation A148 to cause a reverse leakage phenomenon, causing the gas in the gas packaging bag A10 to leak out and lose the function of buffer protection. It can be seen that how to improve the structure of the gas packaging bag and its air valve to enhance the airtight effect to avoid gas leakage and prolong the service life of the gas packaging bag is a subject that those skilled in the art are eager to improve.

Contents of the invention

In order to overcome the above-mentioned defects of the prior art, the first object of the present invention is to provide an air-tight device with a reverse air-stop valve which has enhanced air-tight effect and can avoid gas leakage.

The second object of the present invention is to provide a reverse air stop valve with enhanced airtight effect and avoiding gas leakage.

In order to achieve the above-mentioned first purpose, the present invention provides an air sealing device with a reverse air stop valve, which includes: two outer membranes and at least one airtight air chamber formed in the two outer membranes. There is a reverse air stop valve; the second outer membrane is provided with a first heat sealing line, which divides each air chamber into an inflatable area and a gas storage area, and the gas storage area is filled to form an air column; each of the reverse air stop valves It includes: two inner films, at least one heat-resistant material coated between the two inner films, at least one annular heat-sealing line for heat sealing the two inner films, at least one first air inlet, and at least one second air inlet; The annular heat-sealing line is located in the gas storage area; the heat-resistant material runs through the first heat-sealing line and the annular heat-sealing line, and forms at least one The first air inlet forms at least one second air inlet at the intersection with the annular heat-sealing line and between the two inner films; both the two inner films and the heat-resistant material extend from the inflation area to the air storage area; the air column Including the curved surface area and the cylindrical surface area, one side of the curved surface area is the first heat sealing line, when the gas in the gas column presses the second inner film, in the curved surface area, the second inner film forms multiple wrinkles; in the cylindrical area Inside, the two inner membranes are flatly attached to a piece of outer membrane.

The air sealing device includes: a first air passage from the first air inlet to the second air inlet and formed between the two inner membranes, and a first gas channel from the second air inlet to the bottom of the two inner membranes and formed at the The second gas channel between the two inner membranes.

A pair of arc-shaped heat-sealing lines and another heat-sealing line between the pair of arc-shaped heat-sealing lines are also arranged on the two inner films or on the two inner films and any outer film, and the arc-shaped heat-sealing lines start from the ring The arc-shaped heat-sealing line terminates at the bottom end of the inner film; an air path is formed between the pair of arc-shaped heat-sealing lines and between the two inner films.

The annular heat-sealing line is located at the junction of the curved area and the cylindrical area, or in the cylindrical area, or in the curved area, and the air column below the annular heat-sealing line has no wrinkles after inflation.

In the air-filled area, heat-sealing points are respectively provided on the inner side of the two outer films and in contact with the adjacent inner films, and the heat-sealing points are located near the tops of the two inner films.

The thickness of the annular heat-sealing line is greater than the thickness of the two inner films, and the second air inlet and the annular heat-sealing line form a height difference.

The width of the biintima is the same as that of the biexterna, the length of the biintima is shorter than that of the biexterna, and the top and bottom of the biintima are both shorter than the top and bottom of the biexterna.

The width of the two intima is the same as that of the two outer membranes, the length of the two intima is shorter than that of the two outer membranes, the top of the two intima is equal to the top of the two outer membranes, and the bottom of the two intima is shorter than that of the two outer membranes. The bottom end of the film, and the tops of the two inner films and the tops of the two outer films are heat-sealed together.

The inflatable channel is filled with gas or water-air mixture or liquid, and the air column contains gas or water-air mixture or liquid, and the liquid freezes to form an icicle as an intermediary for refrigeration.

The heat-resistant material runs through the first heat-sealing line and the annular heat-sealing line in sections.

In order to achieve the above-mentioned second purpose, the present invention provides a reverse air stop valve, which is used to be installed on an air sealing device, and the air sealing device includes: two outer membranes and at least one airtight air chamber formed in the two outer membranes ; The second outer membrane is provided with a first heat-sealing line, which divides each air chamber into an inflatable area and an air storage area, and the air storage area is filled to form an air column; the reverse air stop valve is installed in the air chamber, which includes: two Sheet inner film, at least one heat-resistant material coated between the two inner films, at least one annular heat-sealing line for heat sealing the two inner films, at least one first air inlet, at least one second air inlet; the annular The heat-sealing line is located in the gas storage area; the heat-resistant material runs through the first heat-sealing line and the annular heat-sealing line, and forms at least one first inlet at the intersection with the first heat-sealing line and between the two inner films. The air port forms at least one second air inlet at the intersection with the annular heat sealing line and between the two inner films; the two inner films and the heat-resistant material extend from the inflation area to the air storage area; each of the air sealing device An independent air column includes a curved surface area and a cylindrical surface area. One side of the curved surface area is the first heat seal line. When the gas in the air column presses the second inner membrane, in the curved surface area, the second inner membrane forms multiple wrinkles. ; In the cylindrical area, the two inner membranes are flat and attached to one outer membrane.

The reverse gas stop valve also includes: a first gas channel from the first gas inlet to the second gas inlet and formed between the two inner membranes, and a gas channel from the second gas inlet to the bottom of the two inner membranes and formed at the The second gas channel between the two inner membranes.

A pair of arc-shaped heat-sealing lines and another heat-sealing line arranged between the pair of arc-shaped heat-sealing lines are also arranged on the two inner films or on the two inner films and any outer film, and the arc-shaped heat-sealing lines start from The annular heat-sealing line terminates at the bottom end of the inner membrane; an air path is formed between the pair of arc-shaped heat-sealing lines and between the two inner membranes.

The annular heat-sealing line is located at the junction of the curved area and the cylindrical area, or in the cylindrical area, or in the curved area, and the air column below the annular heat-sealing line has no wrinkles after inflation.

In the air-filled area, a heat-seal point is provided on the inside of the two outer films and in contact with the adjacent inner film, and the heat-seal point is located near the top of the two inner films.

The thickness of the annular heat-sealing line is greater than the thickness of the two inner films, and the second air inlet and the annular heat-sealing line form a height difference.

The width of the biintima is the same as that of the biexterna, the length of the biintima is shorter than that of the biexterna, and the top and bottom of the biintima are both shorter than the top and bottom of the biexterna.

The width of the two intima is the same as that of the two outer membranes, the length of the two intima is shorter than that of the two outer membranes, the top of the two intima is equal to the top of the two outer membranes, and the bottom of the two intima is shorter than that of the two outer membranes. The bottom end of the film, and the tops of the two inner films and the tops of the two outer films are heat-sealed together.

The inflatable channel is filled with gas or water-air mixture or liquid, and the air column contains gas or water-air mixture or liquid, and the liquid freezes to form an icicle as an intermediary for refrigeration.

The heat-resistant material runs through the first heat-sealing line and the annular heat-sealing line in sections.

In the present invention, when the air is inflated into the inflatable channel, the two outer films and the adjacent inner films are bonded to each other due to heat-sealing points, and the two inner films are not bonded to each other because they are coated with heat-resistant materials. When the two outer films When the membrane expands and stretches the airway, the second inner membrane is also naturally pulled outward, that is, the first air inlet is automatically opened. When the gas flows into between the two inner membranes of the gas storage area through the first gas inlet, the second gas inlet is also automatically opened, so that the gas is filled into the gas column through the second gas inlet to expand it. After the inflation is completed, the gas in the air column presses the two inner membranes and attaches to a piece of outer membrane. Among them, multiple wrinkles are formed between the two inner membranes located in the curved surface area, while the two inner membranes located in the cylindrical area are tight. Tightly and flatly attached to a piece of outer membrane, the gas in the air column also presses the second inner membrane to cover the second air inlet to seal the air column, thereby preventing gas from leaking out and strengthening the breath-holding effect. Since the gas cannot flow backward through the creases and leak out, it effectively solves the problem that the gas packaging bag in the prior art loses cushioning protection and cannot be used for a long time because the gas leaks out from the creases after inflation. Except for the case of being damaged by external force, the invention does not cause gas back leakage phenomenon, thereby greatly increasing the service life of the air sealing device.

Description of drawings

FIG. 1A is a schematic diagram of a prior art gas packaging bag before inflation;

Fig. 1B is a schematic diagram of a prior art gas packaging bag after inflation;

Fig. 2A is a schematic diagram of the gas valve structure of another prior art gas packaging bag;

Fig. 2B is a sectional view of the gas valve structure of another prior art gas packaging bag;

Fig. 3 is the cross-sectional view of another prior art gas packaging bag inflated;

Figure 4A is a plan view of the first embodiment of the present invention before inflation;

Fig. 4B is a cross-sectional view of the first embodiment of the present invention after inflation;

Fig. 4C is a three-dimensional schematic view of the first embodiment of the present invention after inflation;

FIG. 4D is a schematic perspective view of another modified example of the first embodiment of the present invention after inflation;

Fig. 5 A is the sectional view before inflating along A-A' line among Fig. 4 A;

Figure 5B is a sectional view after inflation along the line A-A' in Figure 4A;

Fig. 6 is a plan view of the second embodiment of the present invention before inflation;

Fig. 7 is a plan view of the third embodiment of the present invention before inflation;

Fig. 8 is a plan view of the fourth embodiment of the present invention before inflation;

Fig. 9 is a cross-sectional view of the fifth embodiment of the present invention after inflation.

Detailed ways

first embodiment

Fig. 4A, Fig. 4B, Fig. 4C, Fig. 5A and Fig. 5B show the first embodiment of the air sealing device with reverse air stop valve of the present invention. The air sealing device 1 of the present invention comprises: two outer films 2a, 2b stacked up and down, and a plurality of airtight air chambers formed in the two outer films. The reverse air stop valve is arranged in the air chamber.

The top peripheral edges and bottom peripheral edges of the two outer films 2a, 2b are respectively heat-sealed and bonded by heat-sealing lines 3a, 3d, and the side-end peripheral edges are respectively heat-sealed and bonded by heat-sealing lines 3c, 3h, wherein the heat-sealing lines 3a, 3d and 3c completely heat-seal the peripheral edge of the second outer film, but the heat-sealing line 3h does not completely heat-seal the side end periphery of the second outer film. A heat-sealing line 3b, the top end of the heat-sealing line 3h intersects with the first heat-sealing line 3b. An inflatable channel 9 is formed between the two outer films and between the heat-sealing lines 3a, 3b, and an inflatable port 12 is provided at the side end of the inflatable channel 9. The second outer film is also provided with a plurality of heat-sealing lines 3e at the same height as the heat-sealing line 3h, and the heat-sealing line 3e divides the two outer films into a plurality of independent airtight chambers, and each air chamber includes: The air-filling area 3a-3b between the sealing line 3a and the first heat-sealing line 3b, and the gas storage area 3b-3d between the first heat-sealing line 3b and the heat-sealing line 3d.

Two inner membranes 1a, 1b superimposed up and down are also arranged between the two outer membranes 2a, 2b, and the two inner membranes have the same width as the second outer membranes, and the peripheries on both sides of the two inner membranes are also heated. The sealing lines 3c and 3h are heat-sealed and bonded, and the two inner membranes are also separated by a plurality of heat-sealing lines 3e. However, the length of the second inner membrane is shorter than that of the second outer membrane. As shown in Figure 4B, the top of the second inner membrane is located in the air-filled area and is lower than the top of the second outer membrane; the bottom of the second inner membrane is located in the gas storage area and is shorter than the second outer membrane. The bottom end of the adventitia, the line 33 in Figure 4A is the bottom end of the two inner membranes.

Each air chamber of the two outer membranes is provided with a reverse air stop valve, which includes two inner membranes 1a, 1b placed between the two outer membranes 2a, 2b. A heat-resistant material 1c is pre-coated between the two inner membranes, and its shape is like a knot, also called a heat-resistant knot. The two inner membranes and the heat-resistant material 1c both extend from the gas-filled area to the gas-storage area.

The two inner films 1a and 1b are heat-sealed and bonded by an annular heat-sealing line 3f, which is set in the gas storage area, and the heat-resistant material 1c runs through the first heat-sealing line 3b and the annular heat-sealing line 3f , and the heat-resistant material 1c forms the first air inlet 2e at the intersection with the first heat-sealing line 3b and between the two inner films, and the heat-resistant material 1c forms the first air inlet 2e at the intersection with the annular heat-sealing line 3f and between the two inner films A second air inlet 2f is formed between them. A first gas passage is formed from the first gas inlet 2e to the second gas inlet 2f.

In the air-filled regions 3a-3b, the inner sides of the two outer films are heat-sealed and bonded to the outer surfaces of the adjacent inner films respectively by heat-sealing points 2c, and the heat-sealing points 2c are preferably located near the tops of the two inner films.

The gas storage area 3b-3d is inflated to form an independent air column 11, the air column includes a curved area 11a and a cylindrical area 11b, as shown in Figure 4B, the curved area is from the first heat seal line 3b to the annular heat The area between the sealing lines 3f and the cylindrical area is the area below the annular heat sealing line 3f. When the gas in the gas storage area presses the two inner membranes, multiple wrinkles 110 are formed between the two inner membranes in the curved area; while in the cylinder area, the two inner membranes are tightly and flatly attached to one piece on the adventitia.

When the air sealing device 1 of the present invention is inflated, the gas first enters from the inflation port 12 along the inflation passage 9, and in the inflation zone, first the two outer membranes are expanded and the air passage 9 is filled, and the two inner membranes are coated with The heat-resistant material 1c is not joined to each other, and the two outer films and the adjacent inner films are bonded to each other because of the heat sealing points 2c respectively. When the two outer films expand and open the air passage, the two inner films will naturally Open outward, thereby automatically opening the first air inlet 2e, so that air enters the air storage area. When the gas flows into between the two inner membranes 1a and 1b in the gas storage area through the first gas inlet 2e, the two inner membranes are not bonded to each other because the heat-resistant material is coated between the two inner membranes, thus making the second inlet The air port 2f is automatically opened, and the gas is filled into the air column 11 through the second air inlet 2f, and then the air column 11 is inflated and expanded. Since each air column is inflated, the entire air sealing device 1 is completely filled.

The curved surface area 11a is a plane before inflating, and as the air column is continuously inflated, the air column in the curved surface area 11a gradually changes from a plane to a sloped arc area similar to a sphere, because there is a natural shrinkage from the plane to the arc "π", as shown in FIG. 4C, so the inner and outer membranes of the curved surface area 11a after inflating produce many wrinkles due to natural shrinkage, and after inflating, the inflated areas 3a-3b also produce many wrinkles due to shrinkage. Although the gas in the gas column 11 presses the two inner membranes 1a, 1b located in the curved surface area 11a so that it can attach a piece of outer membrane 2a or 2b to cover the first air inlet 2e, the two inner membranes 1a in the curved surface area , 1b cannot be smoothly attached to a piece of outer membrane 2a or 2b due to the formation of many wrinkles 110, as shown in Figure 4B, which provides a slit for the air in the air column to flow backward.

But in the cylindrical area 11b on the lower side of the curved area 11a, the air column 11 is cylindrical at the cylindrical area 11b, and the gas in the air column 11 presses the two inner membranes 1a, 1b located in the cylindrical area 11b, making the two inner membranes The membrane is tightly and flatly attached to a piece of outer membrane 2a or 2b, thereby covering the second gas inlet 2f and closing the gas column 11, so that the gas in the gas column 11 cannot flow back through the folds 110 located in the curved surface area 11a. Leak out, so as to achieve the effect of holding your breath.

In Figure 5A and Figure 5B, since the annular heat-sealing line 3f is formed by bonding the two inner films 1a and 1b by means of heat sealing, the thickness of the annular heat-sealing line 3f is greater than that of the two inner films 1a and 1b. thickness, so that the second air inlet 2f and the annular heat-sealing line 3f form a level difference. When the gas column 11 is inflated, the gas in the gas column 11 presses the two inner membranes 1a, 1b to cover the first gas inlet 2e and the second gas inlet 2f, thereby closing the gas column 11 so that the gas in the gas column 11 cannot The reverse flow and leakage from the corrugations 110 located in the curved area 11a not only strengthens the airtight effect, but also greatly prolongs the service life of the airtight device.

Modification of the first embodiment

FIG. 4D is a modified example of the first embodiment of the present invention, and its structure is different from that of FIG. 4C in that heat-sealing lines 4g and 4h are provided in FIG. 4D. In Fig. 4D, a pair of arc-shaped heat-sealing lines 4g and 4h are also arranged on the two inner films 1a and 1b, or on the two inner films 1a and 1b and any outer film 2a or 2b, starting from the heat-sealing line 4g. It starts from the annular heat-sealing line 3f and ends at or close to the bottom end of the inner membrane. An air path 13 is formed between the pair of arc-shaped heat-sealing lines 4g and between the two inner films. Air port 14.

In this embodiment, after the two inner films are laminated, the annular heat-sealing line 3f is heat-sealed first, and then the pair of arc-shaped heat-sealing lines 4g and 4h are heat-sealed.

As shown in Figure 4D, when the air-tight device 1 is inflated, the gas enters from the inflation port 12 along the inflatable channel 9, firstly the two outer membranes are expanded and the air channel 9 is opened, and the gap between the two outer membranes and the adjacent inner membrane Since the heat-sealing points 2c are provided respectively, they are bonded to each other, and the two inner membranes are not bonded to each other because they are coated with a heat-resistant material 1c. Thus, when the two outer membranes expand to open the air passage, the two inner membranes will naturally move toward each other. Open outside, thereby automatically opening the first air inlet 2e, so that air enters the curved surface area 11a in the air storage area, and then opens the second air inlet 2f, so that the air is filled into the air column 11 along the air path 13 and the air outlet 14 , so that the air column expands and rises from the first heat-sealing line 3b.

Because the curved surface area 11a is planar before inflated, as the air continues to inflate, the curved surface area gradually changes from a plane to a sloped arc area similar to a sphere, because there is a natural shrinkage "π" from the plane to the arc, so After inflation, the inner and outer membranes of the curved surface area 11a produce many wrinkles due to natural shrinkage, and after inflation, the inflated areas 3a-3b also produce many wrinkles due to natural shrinkage.

After the air enters the second air inlet 2f, the circumferential surface of the cylindrical area 11b is a flat surface without wrinkles. Since the annular heat-sealing line 3f is heat-sealing and bonding the two inner films, it will not conflict with the process of heat-sealing the heat-sealing lines 4g and 4h after the two outer films are superimposed. Also because the annular heat-sealing line 3f is not heat-sealed with any outer film 2a, so after inflation, the curved surface area 11a is a sloped arc area, and the annular heat-sealing line 3f is formed by the arc inclined surface. Turn into the turning line of the smooth surface of the cylinder, so the heat-sealing lines 4g and 4h are set from the annular heat-sealing line 3f. The two inner membranes below the sealing line 3f are tightly pressed against one piece of outer membrane.

In addition, the area from the heat-sealing line 3a to the heat-sealing line 3b to the heat-sealing line 3f is called the wrinkle area 3a-3b-3f. This area is flat before inflation, and after inflation, the surface will produce natural Shrinking wrinkles, and the wrinkles are naturally tightened by air pressure. But after inflation, there is no wrinkle on the air column below the annular heat-sealing line 3f, that is, there are no wrinkles on the inner and outer membranes. In this area, the air column forms a very smooth cylindrical surface after being filled with gas, and The heat-sealing lines 3f, 4g, and 4h form prominent seals on the surface of the air column, and when the air pressure in the air column is high, the gas will first suppress the above-mentioned seals. At this time, if you stand in the air column and look at the second inner membrane, you will find that the gas first presses the annular heat-sealing line 3f and the heat-sealing lines 4g, 4h, so that the second air inlet 2f, the air passage 13 and the air outlet 14 Tightly close, and then press the second inner membrane in the outlet area of the annular heat-sealing line 3f, so as to completely block the reverse flow of gas and achieve the effect of strengthening airtightness.

In the present invention, the above-mentioned annular heat-sealing line 3f can be formed by bonding two inner films 1a and 1b with heat-sealing means, or can be formed by bonding one outer film 2a or 2b and two inner films with heat-sealing means. And formed. The annular heat-sealing line 3f can be arranged at the junction of the curved surface area 11a and the cylindrical surface area 11b, or in the cylindrical surface area 11b, or in the curved surface area 11a.

In the present invention, in addition to being able to inflate the air channel 9, it can also be filled with water-gas mixture or liquid, thus, gas or water-gas mixture or liquid can be accommodated in the air column, and the liquid is frozen to form icicles for refrigeration. intermediary.

second embodiment

Figure 6 shows a second embodiment of the present invention. In this embodiment, two inner films 1a and 1b are bonded by means of heat sealing to form a plurality of annular heat-sealing lines 3f, and between the two inner films at the intersection of the heat-resistant material 1c and each annular heat-sealing line 3f are respectively A plurality of second air inlets 2f are formed. In addition, a partition line 3g is arranged between a plurality of annular heat-sealing lines 3f, so that a plurality of annular heat-sealing lines 3f can pass through the partition line 3g to partition the air column 11 in sections, so that the air column 11 on each air column Ring heat seal lines are not the same.

Moreover, the heat-resistant material 1c coated in the two inner membranes 1a and 1b starts from the gas-inflating area and extends to the gas-storage area, and the heat-resistant material 1c runs through the first heat-sealing line 3b and the annular heat-sealing line 3f. Sectional coating can also be adopted, first coating the heat-resistant material 1c at the first heat-sealing line 3b so that the heat-resistant material 1c runs through the first heat-sealing line 3b, and then coating the annular heat-sealing line 3f Cover the heat-resistant material so that the heat-resistant material runs through the annular heat-sealing line 3f. Thus, the heat-resistant material 1c penetrates the heat-sealing lines 3b, 3f in sections.

third embodiment

Fig. 7 is a third embodiment of the present invention. In this embodiment, multiple strips of heat-resistant material 1c are coated at different positions between the two inner films 1a and 1b. Because the heat-resistant material 1c runs through the first heat-sealing line 3b and the annular heat-sealing line 3f, multiple strips are formed. There are two first air inlets 2e, and a second air inlet 2f corresponding to each first air inlet 2e.

It is also possible to adopt the method of section coating, to coat heat-resistant material 1c at different positions of the first heat-sealing line 3b to form a plurality of first air inlets 2e, and then to coat different positions of the annular heat-sealing line 3f Cover the heat-resistant material 1c to form a plurality of second air inlets 2f, wherein each first air inlet 2e corresponds to each second air inlet 2f, and the first air inlet 2e and the second air inlet 2f can also be separated. correspond to each other.

Fourth embodiment

Fig. 8 is a fourth embodiment of the present invention. This embodiment includes: a first gas channel 23 and a second gas channel 24, wherein the first gas channel 23 connected to the first gas inlet 2e is formed by heat-sealing and bonding the two inner films 1a and 1b by heat-sealing means between the two inner membranes. The second gas channel 24 connected to the second gas inlet 2f is formed between the two inner films 1a and 1b by heat sealing means.

In addition, in order to adjust the gas flow route, the first gas channel 23 and the second gas channel 24 can also be designed in various ways as shown in Figure 8, so that the gas can easily pass through the first gas channel 23 and the second gas channel 24 and flow into the gas column 11, but it is difficult to flow countercurrently along the second gas channel 24 and the first gas channel 23 to leak out. For example, the width of one end of the first gas channel 23 connected to the first gas inlet 2e is greater than the width of the other end, and the gas pressure of the first gas channel 23 at the curved position is greater than the gas pressure on both sides, so that the gas can easily enter the first gas inlet. 2e is not easy to escape, and when the internal pressure of the gas column 11 increases, the curved part of the first gas channel 23 is pressed to achieve the gas lock effect. The second gas channel 24 can also be designed with the same structure as the first gas channel so as to have the same effect.

fifth embodiment

Fig. 9 is a fifth embodiment of the present invention. The width of the inner membrane is the same as that of the outer membrane, the length of the inner membrane is shorter than the length of the outer membrane, and the top of the inner membrane is equal to the top of the outer membrane, and the top of the inner membrane and the outer membrane The peripheral edges are heat-sealed together by heat-sealing lines 3a. An air-inflating channel 9 is formed between the two inner membranes 1a and 1b, and one end of the air-inflating channel 9 is provided with an air-inflating port 12, which can communicate with the outside.

In this embodiment, the inflated air column is at least divided into two parts, the curved area 11a and the cylindrical area 11b, and an annular heat-sealing line 3f is provided on the side of the curved area 11a close to the cylindrical area 11b. The heat seal line 3f is in the cylindrical area 11b. When the air column 11 is inflated, the gas presses the two inner membranes 1a and 1b to cover the first air inlet 2e and the second air inlet 2f, thereby closing the air column 11 and strengthening the airtight effect, so that the gas cannot flow back from the folds 110 to the outside It solves the problem that the existing gas packaging bag cannot be used for a long time because the gas leaks through the folds and loses the cushioning protection after inflation. Except for the damage caused by external force, the present invention will not cause gas back leakage phenomenon, thereby greatly increasing the service life of the air sealing device 1 .

Although the technical content of the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any equivalent changes or substitutions made by any person familiar with the art without departing from the spirit of the present invention are all Should belong to the category of the present invention.

Claims (20)

1. air seal that has reverse air-stopping valve, it comprises: (2a 2b) and be formed at least one sealed gas chamber in two adventitias, is provided with reverse air-stopping valve in the described air chamber for two adventitias; It is characterized in that,

Two adventitias are provided with the first heat-sealing line (3b), and each air chamber is divided into inflatable region and gas storage district, and the gas storage district is filled the back and forms gas column (11);

Described each reverse air-stopping valve comprises: and two inner membrances (1a, 1b), be coated at least one ring-type heat-sealing line (3f), at least one first air intake (2e), at least one second air intake (2f) of at least one heat proof materials (1c) intermembranous in two, heat-sealing two inner membrances;

Described ring-type heat-sealing line (3f) is positioned at the gas storage district; Described heat proof material (1c) runs through the first heat-sealing line (3b) and ring-type heat-sealing line (3f), and and first heat-sealing line (3b) intersection and between two inner membrances, form at least one first air intake (2e), and ring-type heat-sealing line (3f) intersection and between two inner membrances, form at least one second air intake (2f);

Two inner membrances (1a, 1b) and heat proof material (1c) all extend to the gas storage district from inflatable region;

Described gas column (11) comprises curved regions (11a) and cylinder district (11b), and a side of curved regions is the first heat-sealing line (3b), and when the gas in the gas column was oppressed two inner membrances, in curved regions, two inner membrances formed a plurality of fold; In the cylinder district, two inner membrances are smooth to be attached in a slice adventitia.

2. the air seal that has reverse air-stopping valve as claimed in claim 1, it is characterized in that, it comprises: from first air intake (2e) to second air intake (2f) and be formed on two inner membrance (1a, first gas passage 1b), and from second air intake (2f) to two inner membrance bottoms and be formed on second gas passage between two inner membrances.

3. the air seal that has reverse air-stopping valve as claimed in claim 1, it is characterized in that, two inner membrance (1a, 1b) go up or two inner membrances and arbitrary adventitia on also be provided with a pair of arcuation heat-sealing line (4g) and heat-sealing line (4h), a pair of arcuation heat-sealing line (4g) opens in ring-type and seals line (3f), ends at the bottom of inner membrance; Between this a pair of arcuation heat-sealing line (4g) and between two inner membrances, form air conduct path (13); Described heat-sealing line (4h) is positioned between the described a pair of arcuation heat-sealing line (4g).

4. the air seal that has reverse air-stopping valve as claimed in claim 1, it is characterized in that, described ring-type heat-sealing line (3f) is positioned at the intersection in curved regions (11a) and cylinder district (11b) or is positioned at cylinder district (11b) or is positioned at curved regions (11a), and the following gas column no wrinkle of inflation back ring-type heat-sealing line (3f).

5. the air seal that has reverse air-stopping valve as claimed in claim 1, it is characterized in that, in described inflatable region, at two adventitia (2a, the inside 2b) and be respectively equipped with heat seal point (2c) with adjacent inner membrance contact position, this heat seal point is positioned at the top end near two inner membrances.

6. the air seal that has reverse air-stopping valve as claimed in claim 1 is characterized in that, the thickness of described ring-type heat-sealing line (3f) is greater than the thickness of two inner membrances, and described second air intake (2f) forms high low head with ring-type heat-sealing line.

7. the air seal that has reverse air-stopping valve as claimed in claim 1 is characterized in that, described two inner membrance (1a, 1b) with two adventitia (2a, width 2b) is identical, the length that is shorter in length than two adventitias of two inner membrances, and the top of two inner membrances and bottom all are shorter than the top and the bottom of two adventitias.

8. the air seal that has reverse air-stopping valve as claimed in claim 1, it is characterized in that, described two inner membrances are identical with the width of two adventitias, the length that is shorter in length than two adventitias of two inner membrances, the top of the top of two inner membrances and two adventitias is contour, the bottom of two inner membrances is shorter than the bottom of two adventitias, and the top of the top of two inner membrances and two adventitias together is heat-sealed bonding.

9. the air seal that has reverse air-stopping valve as claimed in claim 1, it is characterized in that, the top of described adventitia is provided with heat-sealing line (3a), between the described adventitia top heat-sealing line (3a) and the first heat-sealing line (3b), has inflation road (9), be filled with gas or air-water mixture or liquid in the described inflation road (9), gas or air-water mixture or liquid have been taken in the gas column (11), liquid freezing and form icicle with as the refrigeration mediator.

10. the air seal that has reverse air-stopping valve as claimed in claim 1 is characterized in that, described first heat-sealing line (3b) and ring-type heat-sealing line (3f) are run through in described heat proof material (1c) piecewise.

11. a reverse air-stopping valve is used to be installed in air seal, air seal comprises: and two adventitias (2a, 2b) and be formed at least one sealed gas chamber in two adventitias; Two adventitias are provided with the first heat-sealing line (3b), and each air chamber is divided into inflatable region and gas storage district, and the gas storage district is filled the back and forms gas column (11); It is characterized in that, this reverse air-stopping valve is installed in the air chamber, it comprises: and two inner membrances (1a, 1b), be coated at least one ring-type heat-sealing line (3f), at least one first air intake (2e), at least one second air intake (2f) of at least one heat proof materials (1c) intermembranous in two, heat-sealing two inner membrances;

Described ring-type heat-sealing line (3f) is positioned at the gas storage district; Described heat proof material (1c) runs through the first heat-sealing line (3b) and ring-type heat-sealing line (3f), and and first heat-sealing line (3b) intersection and between two inner membrances, form at least one first air intake (2e), and ring-type heat-sealing line (3f) intersection and between two inner membrances, form at least one second air intake (2f);

Two inner membrances (1a, 1b) and heat proof material (1c) all extend to the gas storage district from inflatable region;

Each of described air seal independently gas column (11) comprises curved regions (11a) and cylinder district (11b), and a side of curved regions is the first heat-sealing line (3b), and when the gas in the gas column was oppressed two inner membrances, in curved regions, two inner membrances formed a plurality of fold; In the cylinder district, the smooth a slice adventitia that is attached at of two inner membrances.

12. reverse air-stopping valve as claimed in claim 11, it is characterized in that, it comprises: from first air intake (2e) to second air intake (2f) and be formed on two inner membrance (1a, first gas passage 1b), and from second air intake (2f) to two inner membrance bottoms and be formed on second gas passage between two inner membrances.

13. reverse air-stopping valve as claimed in claim 11, it is characterized in that, two inner membrances (1a, 1b) go up or two inner membrances and arbitrary adventitia on also be provided with a pair of arcuation heat-sealing line (4g) and heat-sealing line (4h), a pair of arcuation heat-sealing line (4g) opens in ring-type and seals line (3f), ends at the bottom of inner membrance; Between this a pair of arcuation heat-sealing line (4g) and between two inner membrances, form air conduct path (13); Described heat-sealing line (4h) is positioned between the described a pair of arcuation heat-sealing line (4g).

14. reverse air-stopping valve as claimed in claim 11, it is characterized in that, described ring-type heat-sealing line (3f) is positioned at the intersection in curved regions (11a) and cylinder district (11b) or is positioned at cylinder district (11b) or is positioned at curved regions (11a), and the following gas column no wrinkle of inflation back ring-type heat-sealing line (3f).

15. reverse air-stopping valve as claimed in claim 11 is characterized in that, in described inflatable region, (this heat seal point is positioned at the top end near two inner membrances for 2a, the inside 2b) and be provided with heat seal point (2c) with adjacent inner membrance contact position at two adventitias.

16. reverse air-stopping valve as claimed in claim 11 is characterized in that, the thickness of described ring-type heat-sealing line (3f) is greater than the thickness of two inner membrances, and described second air intake (2f) forms high low head with ring-type heat-sealing line.

17. reverse air-stopping valve as claimed in claim 11 is characterized in that, described two inner membrance (1a, 1b) with two adventitia (2a, width 2b) is identical, the length that is shorter in length than two adventitias of two inner membrances, and the top of two inner membrances and bottom all are shorter than the top and the bottom of two adventitias.

18. reverse air-stopping valve as claimed in claim 11, it is characterized in that, described two inner membrances are identical with the width of two adventitias, the length that is shorter in length than two adventitias of two inner membrances, the top of the top of two inner membrances and two adventitias is contour, the bottom of two inner membrances is shorter than the bottom of two adventitias, and the top of the top of two inner membrances and two adventitias together is heat-sealed bonding.

19. reverse air-stopping valve as claimed in claim 11, it is characterized in that, the top of described adventitia is provided with heat-sealing line (3a), between the described adventitia top heat-sealing line (3a) and the first heat-sealing line (3b), has inflation road (9), be filled with gas or air-water mixture or liquid in the described inflation road (9), gas or air-water mixture or liquid have been taken in the gas column (11), liquid freezing and form icicle with as the refrigeration mediator.

20. reverse air-stopping valve as claimed in claim 11 is characterized in that, described first heat-sealing line (3b) and ring-type heat-sealing line (3f) are run through in described heat proof material (1c) piecewise.

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