Corrugated board structure

Details Corrugated board structure Corrugated board structure

1997-03-24

1998-12-01

Friedman, Carl D.

Static structures (e.g., buildings)

With synthetic resinous component

Foam

5230914, 52630, 5278311, 527921, 527941, 428127, 428130, 428178, 428182, 428192, E04C 2284, B32B 300

Patent

active

058423150

ABSTRACT:
A corrugated board structure including an upper layer of corrugated board, a bottom film and a middle layer of PU foam. Each side of the bottom PVC film is formed with an inward bent upright folded wall which, during the foaming and expansion procedure of the PU foam, restricts the foaming space so as to continuously produce solid foam structure. The middle PU foam makes the upper and lower layers tightly adhered to each other as an integral body. An edge of the projection on one side and an edge of one of the front and rear ends is free from any PU foam and bottom film so that two adjacent corrugated boards can be overlaid and connected.

REFERENCES:
patent: 2913075 (1959-11-01), Zittle
patent: 3062337 (1962-11-01), Zittle
patent: 3535844 (1970-10-01), Glaros
patent: 3555756 (1971-01-01), Curran et al.
patent: 3583123 (1971-06-01), Holmgren et al.
patent: 3733232 (1973-05-01), Payne
patent: 3846054 (1974-11-01), Davis
patent: 4206267 (1980-06-01), Jungbluth
patent: 5299405 (1994-04-01), Thompson
patent: 5612111 (1997-03-01), Lin

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