Coupling structure, coupling process and coupling apparatus of laminate film
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United States of America Patent
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Jun 14, 2011
Grant Date -
Nov 16, 2006
app pub date -
Jul 21, 2006
filing date -
Sep 20, 2000
priority date (Note) -
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Abstract
A coupled portion of mutual laminate films sufficiently contributes to the formation of a packaging bag in that the coupled portion itself has excellent air tightness and liquid tightness. The tensile strength required for the laminate film is given to the coupled portion, whereby a temporary stop of a packaging apparatus is useless when a connecting portion of the laminate film is passed through the apparatus, thereby enhancing the operation efficiency and improving the yield of the material. Oriented base film layers are joined in a mitre form at the coupled portion between a rear end portion and a front end portion of laminate films comprising oriented base film layers and sealant layers.
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