PROFILED CELLULAR ARTICLE

A flexible polyvinyl chloride foam member is provided with a permanent profile or shape by use of compressive pressure and radio frequency heating. The resulting article has a higher concentration of smaller foam cells in a portion of higher density than in a portion of lower density.

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Bibliographic Details
Main Author PEARSALL R,US
Format Patent
LanguageEnglish
Published 23.10.1973
Subjects
FOOTWEAR
HUMAN NECESSITIES
MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING ORREPAIRING FOOTWEAR
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Summary:A flexible polyvinyl chloride foam member is provided with a permanent profile or shape by use of compressive pressure and radio frequency heating. The resulting article has a higher concentration of smaller foam cells in a portion of higher density than in a portion of lower density.
Bibliography:Application Number: USD3766669