Method and apparatus for making billowed filling elements...

Details Method and apparatus for making billowed filling elements... Method and apparatus for making billowed filling elements...

B - Operations, Transporting

29

C

217/1, 18/663

B29C 67/20 (2006.01)

Patent

CA 1191313

ABSTRACT OF THE DISCLOSURE A plastified mass of thermoplastic material con- taining 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 ship- ping container. Similarly, the double bubble elements preclude nesting and interlocking.

406210

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