Air cushion cylinder having a sealer of air sealing and locking device and the method for preparing the same

Abstract

The invention relates to an air buffer having an automatic seal body air shutting-off and locking device and a making method thereof. The air buffer comprises a seal body composed of a continuous film coil and comprising two pieces of external film and two pieces of internal film, a plurality of equidistant heat-resistant nodes made from heat-resistant material are coated on the top of the internal surface of one internal film, and hot seal nodes are arranged at the positions at the same height as the heat-resistant nodes of one external film, and hot seal transversal lines are employed to divide the seal body into aerating channel regions and air storing columns, the aerating channels join the air storing columns through the hot seal lines, an internal film with heat-resistant nodes is arranged on the external film to make the internal film and the external film unjoined to form a sole channel air inlet. When aerating, the air channel portions of the two pieces of external films will expand to draw the internal films joined therewith, thus to allow all the air inlets along the air channels to open indirectly. In this way, a plurality of seal bodies are needed to be aerated, the air inlets are shut off and the air inlet paths are locked after aerating, thereby the air buffer having dual air shutting-off functions and durable seal performance.

Description

technical field [0001] The present invention relates to an air cushioning device for inner packaging, in particular to an air cushioning body with a device for automatically closing and locking air in a sealing body and a manufacturing method thereof. Background technique [0002] It is a trend to heat-seal the resin film as the base material to form a sealed body, and use it as the cushioning material of the inner packaging after inflation. Generally, there are two types of air buffers. One is composed of independent air columns. Each air column has an independent air inlet. When inflating, each air inlet must be inflated, so it is time-consuming and uneconomical to inflate. In addition, the new type in Taiwan, China In the patent No. M255242, a plurality of heat-resistant prints are sandwiched between the upper and lower air valve membranes as the air nozzles for inflating air. Unfortunately, the inflating channels cannot automatically open the air inlets of each sealing b...

AI Technical Summary

Problems solved by technology

Generally, there are two types of air buffers. One is composed of independent air columns. Each air column has an independent air inlet. When inflating, each air inlet must be inflated, so it is time-consuming and uneconomical to inflate. In addition, the new type in Taiwan, China In Patent No. M255242, a plurality of heat-resistant prints are sandwiched between the upper and lower air valve membranes as air nozzles for inflating air intake. Unfortunately, the inflating channel cannot be inflated at one time to automatically open the air inlets of each sealing body.

The other type consists of one or two inflation ports with non-independent air columns. The disadvantage is that if one is damaged, all the air columns will be degassed together, such as US Patent No. 5427830

In addition, these two types of air buffers only raise the inner membrane to increase the air pressure, but do not further study the method of further locking the air. Therefore, the air in the air column after inflation cannot last for a long time without leaking. The above shortcomings make the practicability of the air buffer lower.

[0003] China Taiwan Invention Patent No. 92113574 approved on May 20, 2003 discloses an installation structure for a switch valve of a sealed body, wherein the switch for air entering the sealed body uses two pieces of inner film and one side of the outer film to form a switch The passage of the valve, when inflated, the sealing body expands to block the passage. The patent only describes how to block the air in the sealing body from leaking out, but does not explain how to simplify the inflation. By design, air cannot automatically enter the seal

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