STRUCTURAL ELEMENT COMPRISING CARDBOARD

摘要

The invention provides structural elements comprising an elongated internal member and an elongated external member enclosing said internal member, in which a mid-portion enveloping the internal member and being in tight association with the external surface of the internal member, defines, jointly with said internal member, a first, core-envelope sub-structure, while two flanking portions extending from and integral with the mid-portion and facing and contacting one another to jointly define a second, layered sub-structure. The invention further provides methods for manufacturing such structural elements.

主权项

1. A method for manufacturing a structural element, comprising (in the given sequence or in any other):
providing (i) an elongated member having a rounded circumference, and (ii) a single- or multi-sheet cardboard structure having first and second opposite surfaces; forming the cardboard structure to have a central portion wrapped tightly around said elongated member and with the first surface of said portion in close association with external surface of the elongated member to thereby define a first, core-envelope sub-structure and have flanking portions that are opposite one to the other to define a second, layered sub-structure integral therewith.