Backpressure valve apparatus with reinforced backpressure effect
A technology of check valve and backstop, which is applied in the field of check valve devices, can solve problems such as poor backstop function and impact on the protection and shock absorbing effect of gas packaging bags, and achieve the effect of strengthening the backstop sealing effect
Inactive Publication Date: 2010-09-22
赖宏斌 +1
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Problems solved by technology
However, because only two pieces of air valve film form the air-stop effect, it is found that the backstop function is not good in actual use, and it is easy to gradually generate air leakage, which affects the protective and shock-absorbing effect of the gas packaging bag.
Method used
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Embodiment 1
[0028] Example 1, a check valve device with enhanced backstop effect for gas packaging bags, please refer to figure 1 , figure 1 It is a schematic diagram of the first air valve membrane 24 of the check valve device; figure 2 yes figure 1 Sectional view at A-A of ; image 3 yes figure 1 Sectional view at B-B. The upper half of the first air valve film 24 is provided with a plurality of heat-resistant printing 33 at intervals, and the heat-resistant printing 33 is coated on the first surface 63 of the first air valve film 24 ( figure 1 on the upper surface). The lower half of the first air valve film 24 is provided with a plurality of protrusions 61, and the protrusions 61 are on mutually adjacent rows, and one row protrudes toward the direction of the first surface 63, as figure 2 As shown, another column protrudes toward the direction of the second surface 64, as image 3 As shown, the second surface 64 is located at the back of the first surface 63 .
[0029] Pleas...
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The invention relates to a check valve device which can reinforce the effect of backflow prevention, comprising an upper film, a lower film and a check valve device clamped between the upper film and the lower film, thus to form a gas packing bag; the invention is characterized in that: the check valve device is formed by sequentially superposing a first gas check film, a second gas check film, athird gas check film together; the upper half part of the first gas check film is provided with a plurality of heat resistant prints at intervals, the heat resistant prints are coated on a first surface of the first gas check film in a printing way, and the lower half part of the first gas check film is provided with a plurality of bulges; the width of the second gas check film is equal to that of the first gas check film, and the lower half part of the second gas check film is provided with a plurality of bulges; the width of the third gas check film is larger than that of the first and second gas check films and the third gas check film is fully distributed with a plurality of bulges. The width of the third gas check film in the optimum proposal is larger than that of the first and second gas check films. The check valve device of the invention can allow a gas column to form stronger air tightness, thus preventing the gas in the gas column from escaping and leading to better dampingeffect.
Description
technical field [0001] The invention relates to a check valve device with enhanced backstop effect used in gas packaging bags. The check valve device is composed of the first, second and third gas valve films stacked together in sequence. A plurality of heat-resistant prints are arranged at intervals on the upper half of the air valve film, and a plurality of protrusions are arranged on the first, second and third air valve films, and the width of the third air valve film is larger than that of the first and second air valve films. By virtue of the characteristics of the film material, combined with the structure of the first, second, and third air valve membranes with villi-like protrusions, and the multiplied effect of the extension part of the third air valve membrane being pressed and adhered to the surface of the upper membrane, the air column can A stronger airtight seal is formed to prevent the gas in the air column from escaping, resulting in better protection for shoc...
Claims
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IPC IPC(8): B65D30/24
Inventor 赖宏斌
Owner 赖宏斌