US PATENT SUBCLASS 5 / 233
.~.~.~ Marginal spring tension

Current as of: June, 1999
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5 /   HD   BEDS

131  DF  BEDSTEADS {6}
400  DF  .~ Having bottom {9}
230  DF  .~.~ Of fabrics and springs {5}
233.~.~.~ Marginal spring tension

DEFINITION

Classification: 5/233

(under subclass 230) Devices arranged to exert outward marginal pull upon the fabric and allow sag under weight. Frequently the fabric passes over rollers to attaching springs beneath.

SEE OR SEARCH THIS CLASS, SUBCLASS:

199, for marginal spring connections in fabricated elastic flats.

234, for leaf spring supports.