Package having peel seal tamper-evidence message
AssigneeOscar Mayer Foods Corporation
InventorGerald O. Hustad
Life of this patent
Estimating the term…
Abstract
A package is provided which incorporates a peel seal area or areas that provide readily detectable evidence that the package has been opened or tampered with. Message indicia are provided at the peel seal, and the appearance of the message indicia changes when the peel seal area, which has a contact clarity condition when sealed, is broken resulting in the onset of an opacity condition which thereby obscures message indicia and/or makes message indicia visible in order to inform a consumer or potential purchaser that the peel seal has been broken.
Claims9
In a tamper-evident package for hermetically sealing products between generally opposing package film panels having a peelable seal securing the generally opposing package film panels together at a peelable seal area, the peelable seal being openable with digital forces and not reclosable, the improvement comprising:
- tamper-evidence means disposed within said peelable seal area and formed within at least one of the generally opposing package film panels within said peelable seal area by heat sealing said generally opposing package film panels together, the tamper-evidence means indicating that said generally opposing package film panels have been separated at said peelable seal;
- a message component formed within the at least one of said generally opposing package film panels within said peelable seal area, said message component having visual indicia means for informing of seal disruption, the visual indica means being formed within said peelable seal area by the heat seal adhering said two generally opposing film panels together without the necessity of adding a separate component layer to said peelable seal area;
- said tamper-evidence means having a contact clarity condition when said package generally opposing panels are in a sealed state at said peelable seal area;
- and
- said tamper-evidence means having an opacity condition which develops within said peelable seal area upon and persists after disruption of the sealed state of said generally opposing package film panels at said peelable seal area, whereby the onset of said opacity condition causes a change in said peelable seal area of said generally opposing package film panels which changes the appearance of said generally opposing package film panels at said peel seal and allows detectability of a message component of said tamper-evidence means, said opacity condition being caused by a cohesive failure of said peelable seal in said at least one of said generally opposing package film panels without the delamination of said generally opposing package film panels within said peelable seal area.
Dependencies are inferred from the claim text.