Stock material or miscellaneous articles – Hollow or container type article – Nonself-supporting tubular film or bag
Patent
1987-01-08
1989-07-11
Robinson, Ellis P.
Stock material or miscellaneous articles
Hollow or container type article
Nonself-supporting tubular film or bag
428 357, 428 72, 428 43, 428178, 428 12, B27N 502, B65D 100
Patent
active
048471267
ABSTRACT:
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 united having cooled gas entrapped through angularly heating 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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Suzuki Mitsugu
Yamashiro Hiroshi
Loney Donald J.
Robinson Ellis P.
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