Buffing expanded foam items
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United States of America Patent
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Oct 17, 2017
Issued Date -
Apr 23, 2015
app pub date -
Oct 22, 2013
filing date -
Oct 22, 2013
priority date (Note) -
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Abstract
Foam items may be buffed using particles such as particulate sodium bicarbonate in accordance with the present invention. Foam items may be, for example, expanded EVA foam items pre-formed into an intermediate size and shape. A skin layer may be formed during the expansion of the foam item to form an expanded foam item which may be entirely or partially removed by buffing the item using particles projected with selected buffing parameters. The buffing parameters may be varied based upon the thickness of at least a portion of the skin layer and/or the desired degree of moldability for the foam item after buffing. Particulate sodium bicarbonate or other types of particles used for buffing may be recycled and reused for further buffing of foam items.
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