Lid for closing a container comprising a thermoplastic material sealing zone
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United States of America Patent
Stats
-
May 16, 1989
Grant Date -
N/A
app pub date -
May 19, 1988
filing date -
May 20, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lid for closing, by thermosealing, a container having a thermoplastic material sealing zone (3) defined by an internal closed line and an external closed line, of the type comprising a closure material (5), a varnish (7) applied to one of the faces of the closure material and an added thermoplastic material layer (6) fixed separably to the closure material and covering at least a part of the varnish which is intended to face the sealing zone of the container to be closed, said lid being characterized in that the added layer (6) has a thickness of the order of 100 to 1000.mu. (10.sup.-4 to 10.sup.-3 m), its thickness being chosen so that the thermoplastic material forming it may, by locally melting during closure of the container by thermosealing, encapsulate the traces of product finding its way on to the sealing zone during filling of the container.
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