Lid for closing a container comprising a thermoplastic material

Details Lid for closing a container comprising a thermoplastic material Lid for closing a container comprising a thermoplastic material

1988-05-19

1989-05-16

Hall, George T.

Receptacles

Closures

Removable closure retained by adhesive or fusion means

220260, 220270, 220258, B65D 4100

Patent

active

048302155

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.

REFERENCES:
patent: 4636273 (1987-01-01), Wolfersperger
patent: 4735335 (1988-04-01), Torterotot
patent: 4738374 (1988-04-01), Ingemann
patent: 4757914 (1988-07-01), Roth et al.

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