Method for manufacturing a foam spring for pillow, cushion, mattresses, or the like
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United States of America Patent
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Jul 7, 2015
Grant Date -
Feb 26, 2009
app pub date -
Aug 21, 2007
filing date -
Aug 21, 2007
priority date (Note) -
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Abstract
A foam spring for use in pillows, cushions, mattresses or the like, the foam spring having a tubular resilient body made of foam with holes extending inwardly from an outside surface to an inside location, wherein the holes extend at a non-perpendicular angle relative to a line perpendicular to the outside surface of the spring at the position of the hole. The foam spring is manufactured by a method which comprises providing interrupted slits along lines extending in the longitudinal direction of a foam layer; cutting a transverse strip out of this foam layer; bending two opposite ends of the strip towards each other; and fixing the two opposite ends into a tubular shape to form the tubular resilient body, wherein the slits are made in a direction forming an angle with the direction perpendicular to the surface of the foamed layer.
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