Multi-density polyurethane foam packing unit and method of makin

Details Multi-density polyurethane foam packing unit and method of makin Multi-density polyurethane foam packing unit and method of makin

1982-02-19

1987-04-21

Sipos, John

Package making

Methods

Filling preformed receptacle and closing

53474, 206524, 206592, 428 71, 428170, B65B 2300

Patent

active

046585672

ABSTRACT:
A polyurethane foam packing unit formed in desired cross-sectional configuration and having a relatively low density. A block which may also be formed of polyurethane or the like is disposed within the unit, and possesses a higher density than that of the mass. A polyurethane flexible liner encompasses the mass and the block embedded therein. The invention further incorporates the method of producing such a unit.

REFERENCES:
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patent: 3311231 (1967-03-01), English
patent: 3520769 (1970-07-01), Baker
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patent: 3864206 (1975-02-01), Linderoth
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patent: 4022317 (1977-05-01), Burgeson
patent: 4030267 (1977-06-01), Arnaud
patent: 4144296 (1979-03-01), Dickens
patent: 4190697 (1980-02-01), Harens
patent: 4304810 (1981-12-01), Gates

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