Multilayer paper material method for its forming and method for obtaining three-dimensional containers
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United States of America Patent
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Aug 27, 2013
Grant Date -
Jan 20, 2011
app pub date -
Feb 13, 2009
filing date -
Feb 14, 2008
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Abstract
A multilayer papery material comprising at least one first sheet of three-dimensional structure and at least one second sheet fixedly coupled to the first sheet and defining empty spaces therein, wherein at least said second sheet is made of a papery material having a degree of extensibility of not less than 5% in all directions.
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