AIR-SEALED BODY CAPABLE OF AUTOMATICALLY OPENING AIR VALVE
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United States of America Patent
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Issued Date -
Jun 3, 2010
app pub date -
Nov 25, 2009
filing date -
Nov 28, 2008
priority date (Note) -
Abandoned
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Abstract
An air-sealed body capable of automatically opening an air valve is provided. First, the two inner films are laminated between two outer films. An air passage and a plurality of air columns are formed through joining by means of heat-sealing. Air inlets are formed by heat-sealing in the two inner films at the places where the heat-resisting material is coated, and a plurality of heat-sealed blocks is formed through joining by means of heat-sealing at the sides of the air inlets. When air is filled in, the two outer films of the air passage are pulled open outward in a longitudinal direction, the air passage contracts in a lateral direction due to a drop height of the heat-sealed blocks. The two inner films are squeezed by the heat-sealed blocks to be pulled open outward in the longitudinal direction to open the air inlet.
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