Method for making expandable filling elements of billowed config

Details Method for making expandable filling elements of billowed config Method for making expandable filling elements of billowed config

1982-07-22

1984-04-03

Anderson, Philip E.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264 54, 264142, 425311, 425817R, B29D 2700

Patent

active

044407041

ABSTRACT:
A plastified mass of thermoplastic material containing an expanding agent is extruded and sliced into pieces by shaped cutting edges to produce--on expanding--elements which are shaped in a billowed manner or a double-bubble manner. The billowed elements have an inturned peripheral edge which prevents nesting and interlocking together when used in a shipping container. Similarly, the double bubble elements preclude nesting and interlocking.

REFERENCES:
patent: 3389204 (1968-06-01), Hafliger
patent: 3961000 (1976-06-01), Ropiequet

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