Patent ID: 7404428

Claim:
A method of making a foldable honeycomb structure, comprising the steps of: (a) providing a plurality of flat strips; (b) folding each of the flat strips in opposite directions about first and second lines each extending the length of the strip to form a plurality of folded strips, whereby each of the folded strips includes a central portion, a first longitudinal margin folded towards one side of the central portion about a first longitudinal crease, and a second longitudinal margin folded towards the other side of the central portion about a second longitudinal crease, and each of the folded strips has a first side and a second side facing in opposite directions where surfaces of the folded strip are outwardly exposed; (c) applying glue to each of the folded strips, respectively, along a first line, a second line and a third line each extending longitudinally on a respective one of the exposed surfaces at the first side or the second side of the folded strip, whereby a plurality of glued strips are formed each of which has a first line of glue, a second line of glue and a third line of glue extending along said first, second and third lines, respectively; and (d) setting the glued strips, one against the other such that the central portion of one of the glued strips is adhered by and at the first line of glue thereof to the second longitudinal margin of another of the glued strips that is adjacent said one of the glued strips, the first longitudinal margin of said one of the glued strips is adhered by and at the second glue line thereof to the second longitudinal margin of said another of the glued strips, and the first longitudinal margin of said one of the glued strips is adhered by and at the third line of glue thereof to the central portion of said another of the glued strips.