3868285 is referenced by 50 patents and cites 10 patents.

Apparatus for making cellular cushioning materials in two primary steps. In the first step, two sheets of thermoplastic film integrally joined or otherwise sealed at their edges to form a tube are joined at spaced locations by crosswise heat seals to form a prefabricated structure suitable for shipping in dense roll form. In the second step, the spaces between the crosswise heat seals are filled with an elastic substance, such as air or other gas, and continuous seals are made lengthwise of the prefabricated structure, subdividing the filled spaces into individually sealed inflated cells.

Methods and apparatus for the manufacture of cellular cushioning materials
Application Number
Publication Number
Application Date
July 18, 1973
Publication Date
February 25, 1975
Troy Constantine T
Synnestvedt & Lechner
B32b 31/00
A63b 41/00
B29C 49/00
B29C 35/00
B29C 35/16
B29C 65/18
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