| 摘要 |
A honeycomb structure (l) formed of two continuous lengths of pleated materials (2, 3) secured together intermediate the pleats. In particular, a honeycomb structure (l) is constructed of foldable material and defining a plurality of longitudinally extending cells (4) connected together in overlying expandable-collapsable relationship for collapsing each cell (4) against the overlying cell, each cell having a longitudinally extending front face (5) and a longitudinally extending back face (6), and wherein the front faces (5) of all of the cells are defined by a first, single piece of foldable material (2); and the back faces (6) of all of the cells are defined by a second, single piece of foldable material (3).
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