| 摘要 |
A mattress of improved support having planar top and bottom surfaces is provided with at least two sets of transversely extending ribs. The ribs, which may be continuous or discontinuous, are less compressible than the material of the mattress and are spaced apart longitudinally from each other within each set. The sets are spaced apart longitudinally to correspond in position to the shoulder area and buttocks area of the user to provide maximum support for body areas of greater weight, and hold the body generally straight. Another embodiment of the invention employs relatively small support plates uniformly distributed between the layers of a multi-layer mattress to provide uniform support over the entire area of the mattress.
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