Envelope for overwrapping filter bags for infusion products and sealing device for obtaining the overwrapping envelope
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United States of America Patent
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Jul 5, 2016
Grant Date -
Feb 19, 2015
app pub date -
Apr 16, 2013
filing date -
Apr 17, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
An overwrap envelope (7) containing a filter bag (1) for infusion products comprises a sheet (2) of overwrapping material folded into a U shape along its transversal axis (X) around the filter bag (1). The overwrap envelope (7) has two longitudinal sides (3, 4) and one transversal side (5) sealed by at least two sealing lines (6) which are uninterrupted along the longitudinal sides (3, 4) and along the transversal side (5). Each sealing line (6) is defined by two longitudinal stretches and one transversal stretch which are joined to obtain an uninterrupted shape and which form an uninterrupted perimeter seal.
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