| 摘要 |
An linear, extruded, inner spring suspension system, mattresses made therewith, and a process of making the inner spring. The linear spring has a thin resilient vertical wall extending longitudinally in the horizontal direction, which may be pleated with at least one (and preferably a plurality) of pleats which extend longitudinally along the wall. The invention may further have a second wall identical to and parallel to the first wall, which may be connected by plates at top and bottom and at medial points to make a linear spring of rectangular cross section. Embodiments of short length create an inexpensive spring having a generally rectangular platform; longer embodiments create an inexpensive spring in the general shape of a box beam. The linear spring may be produced by an extrusion process, in which polymer compounds are forced through a die in the shape of the linear spring cross section.
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