Cushioning material for mattresses
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United States of America Patent
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Apr 16, 1991
Grant Date -
N/A
app pub date -
May 16, 1989
filing date -
May 27, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A cushioning material for mattresses is formed by needling a pile of crimped fibers to form a flat board, and then continuously and alternately bending the flat board to form a corrugated web. The corrugated web thus formed has a number of side-by-side contact portions and a number of bent portions connecting the side-by-side contact portions. The bent portions thus form a relatively soft surface portion of the cushioning material, and the side-by-side contact portions provide a moderately rigid portion of the cushioning material. The corrugated web may be held together by sewing, bonding or welding.
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