Board element

Details Board element Board element

1978-03-24

1980-02-12

Van Balen, William J.

Stock material or miscellaneous articles

Sheet including cover or casing

Foamed or expanded material encased

156245, 273 70, 428157, 428159, 428160, 428315, B32B 300, B32B 3110

Patent

active

041884280

ABSTRACT:
A lightweight board element includes a lightweight core, such as rigid plastic foam, and a covering layer such as glass fiber-reinforced resin. The upper and lower surfaces of the core are provided with a grid pattern made of up narrow grooves for improving stiffness and surface strength. The lower surface is provided with a further grid pattern of wider grooves which offer improved resistance to distortion. The cover layer is bonded to the core in a mold and the cover layer extends over the side edges of the core. The board uses relatively inexpensive materials and has excellent properties. The board element is particularly suited to the fabrication of a table tennis table in which case the grid pattern of narrow grooves in the upper core surface provides excellent ball bounce characteristics.

REFERENCES:
patent: 3000144 (1961-09-01), Kitson
patent: 3222697 (1965-12-01), Scheermesser
patent: 3387420 (1968-06-01), Long
patent: 3755031 (1973-08-01), Hoffman et al.
patent: 3791912 (1974-02-01), Allard
patent: 3841958 (1974-10-01), Delorme
patent: 4070719 (1978-01-01), Morgan

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