Back to results
US 10,954,032 B2Granted
Tamper evident tabbed sealing member having a foamed polymer layer
AssigneeSelig Sealing Products, Inc.
InventorRobert William Thorstensen-Woll
Life of this patent
Estimating the term…
Abstract
A pull-tab sealing member for a container providing a foamed polymer layer positioned within the sealing member for effective heat sealing to the container together with a lower laminate below a tab capable of tearing to provide a tamper evident structure below the tab.
Claims11
A two-piece liner and tamper indicating tabbed seal for sealing to a rim of a container, the liner and seal comprising:
- a liner having a lower surface thereof and a releasable layer configured to temporarily bond the tamper indicating tabbed seal to the liner;
- a tamper indicating tabbed seal having an upper surface releasably bonded to the liner and a lower surface configured for bonding to a container rim, the tamper indicating tabbed seal including
- a lower laminate including a heat sealable layer and an induction heating layer, the lower laminate configured for heat sealing the tamper indicating tabbed seal portion to a container rim;
- an upper laminate at least partially bonded to the lower laminate to form a gripping tab defined within a perimeter of the lower laminate, the upper laminate including a foamed polymer layer, one or more polymer support layers bonded to the foamed polymer layer, and a bonding layer forming the at least partial bond between the upper laminate and the lower laminate;
- the lower laminate and the upper laminate have a construction effective to permit tearing of the lower laminate in response to a removal force applied to the gripping tab such that a first portion of the lower laminate including the heat sealable layer and the induction heating layer is configured to remain bonded to a container rim and a second portion of the lower laminate including the heat sealable layer and the induction heating layer is configured to remain bonded the upper laminate;
- and
- wherein a tear strength of the upper laminate and the bond of the upper laminate to the lower laminate is greater than a tear strength of the lower laminate such that, when bonded to a container rim, the upper laminate remains in one piece and the lower laminate tears upon a removal force applied to the gripping tab.
4 more elements
A two-piece liner and tamper indicating tabbed seal for sealing to a rim of a container, the liner and seal comprising:
- a liner having a lower surface thereof and a releasable layer configured to temporarily bond the tamper indicating tabbed seal to the liner;
- a tamper indicating tabbed seal having an upper surface releasably bonded to the liner and a lower surface configured for bonding to a container rim, the tamper indicating tabbed seal including
- a lower laminate including a heat sealable layer and a foil layer, the lower laminate configured for heat sealing the tamper indicating tabbed sealing member to a container rim, the lower laminate free of polymers having a density greater than 1 g/ml;
- an upper laminate at least partially bonded to the lower laminate to form a gripping tab defined within a perimeter of the lower laminate, the upper laminate including a foamed polymer layer, one or more polymer layers bonded to the foamed polymer layer, and a bonding layer forming the at least partial bond between the upper laminate and the lower laminate;
- and
- the lower laminate and the upper laminate have a construction to permit tearing of the lower laminate across a major surface thereof in response to a removal force applied to the gripping tab such that a first portion of the lower laminate including the heat sealable layer and the foil layer remains bonded to a container rim and a second portion of the lower laminate including the heat sealable layer and the foil layer remains bonded the upper laminate and removed from the container rim together with the upper laminate.
3 more elements
Dependencies are inferred from the claim text.