Light permeable plate of synthetic resin
OwnerHeinrich Wüsterinventor
Life of this patent
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Abstract
An extruded polycarbonate highly transparent plate having outer layers bridged by ribs to define compartments in the plate running to opposite edges thereof, is formed with a frame by injection molding the frame onto the edges of the plate which have been squeezed closed in the injection mold. The frame plastic, e.g. glass fiber reinforced polystyrene has a melting point less than that of the transparent plate.
Claims3
A light permeable plate element comprising a highly transparent hollow light permeable plate formed of thermo-plastic synthetic resin and a plastic frame tightly joined with the periphery of said plate and formed of a synthetic resin having a melting point less than that of the synthetic resin of said plate, said plate comprising a pair of outer layers bridged by a plurality of connecting ribs and defining between them a plurality of elongated compartments with opposite outer ends closed by said plastic frame at the opposite edges of said plate.
Dependencies are inferred from the claim text.