Corrugated plasticboard

Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness

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Details

428182, 428183, 428186, 428198, 428339, B32B 330

Patent

active

042672236

ABSTRACT:
Method and machine for fabricating plasticboard wherein areas of bonding are created with localized heating and pressure.

REFERENCES:
patent: 2642372 (1953-06-01), Chittick
patent: 2949066 (1960-08-01), Bombard
patent: 3603219 (1971-09-01), Hallis, Jr.
patent: 3655502 (1972-04-01), Yoshikama
patent: 3741857 (1973-06-01), Kakutani
patent: 3811987 (1974-05-01), Wilkinson
patent: 3837973 (1974-09-01), Asakura et al.
patent: 3961119 (1976-06-01), Thomas

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