Self-adhesive label valve
AssigneeMasterpack S.P.A.
InventorValerio Binda
Life of this patent
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Abstract
Self-adhesive label valves are disclosed having release chimneys in correspondence of a plurality of intersection cuts in a membrane-island of film (tape) carrier (C) with cuts made in the overlying self-adhesive label made of polymeric film (E) with an adhesive layer. All are inscribed within (i.e. inside) the perimeter of the membrane-island, and are destined to overlie so as to occlude pre-formed release openings in the packaging film of heatable food, and ensure in an outstandingly reliable manner a gradual release of vapors while heating, without causing an undesirable collapse of the packaging film.
Claims7
A self-adhesive label-valve comprising:
- an island-membrane having a perimeter and provided with an anti-adherent surface, and
- a polymeric adhesive label having a perimeter and a coupling surface which comprises
- a pressure activated adhesive layer and is coupled with the anti-adherent surface of the island-membrane,
- wherein the polymeric adhesive label is further provided with one or more cuts
- inscribed in a geometrical projection of the perimeter of the island-membrane, and
- wherein the island-membrane is provided with one or more cuts which are arranged inside the perimeter of the island membrane and which intersect a geometrical projection of one or more of cuts of the polymeric adhesive label.
Dependencies are inferred from the claim text.