发明名称 |
Method for making a dunnage shock absorber |
摘要 |
A dunnage shock absorber and a method and apparatus for making the same is disclosed. The shock absorber is constructed from plastic material which forms a series of trigonal-shaped, gas-filled units which maintain adequate shock absorbing characteristics over a broad range of temperature conditions. This disclosed method includes the steps of forming a plastic tubular body, introducing a cooled gas into the body and forming individual trigonal-shaped units having cooled gas entrapped through angularly heat sealing the edges of such units. The disclosed apparatus forms plastic film into a series of gas-filled trigonal units through the use of fin seal rollers to seal the film into a tubular body. Sponge-like rollers downline of the fin seal rollers grip the tubular body and a conduit injects cooled gas into the tubular body. Horizontal and vertical sealers are provided downline of the sponge-like rollers to heat seal the tubular body with gas entrapped therein.
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申请公布号 |
US4714506(A) |
申请公布日期 |
1987.12.22 |
申请号 |
US19850742091 |
申请日期 |
1985.06.06 |
申请人 |
YAMASHIRO, HIROSHI;SUZUKI, KO |
发明人 |
YAMASHIRO, HIROSHI;SUZUKI, KO |
分类号 |
B31D5/00;B65D81/05;(IPC1-7):B32B31/14 |
主分类号 |
B31D5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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