Edge on foam tags

Abstract

An RFID antenna structure is disclosed that is designed to operate in proximity to metal surfaces. The RFID antenna structure is placed at 90 degrees to the surface of the metallic object, allowing it to operate with minimal separation from the edge of the RFID antenna structure to the metallic object. In another embodiment, the RFID antenna structure comprises an anti-tamper embodiment wherein a RFID tag device is applied to twist and flip-top cap containers, such that tearing along the perforations on the cap disables the RFID tag device.

What is claimed is: 
     
         1 . The RFID antenna structure of designed to operate in proximity to conductive surfaces comprising an RFID inlay, a pair of plastic layers, and a metal layer, wherein the RFID inlay is sandwiched between the pair of plastic layers, and wherein the RFID inlay is positioned 90 degrees to the metal layer, allowing the RFID antenna structure to operate with minimal separation from an edge of the RFID inlay to the metal layer;
 wherein the RFID inlay is linear and incorporated into a protective plastic layer by extrusion,   wrapped in a number of shapes,   wrapped around a form and placed in a cavity, or   incorporated into a structure by injection molding.   
     
     
         2 . A tamper evident RFID antenna structure for twist and flip-top cap containers, comprising:
 a label positioned over the twist cap and over the container;   an RFID inlay positioned over the container; and   a perforation strip engineered over the label and the RFID inlay;   wherein twisting of the cap to expose a container opening, propagates tearing in and along the perforation strip and across and down through the label and the RFID inlay on the container, disabling the RFID inlay.   
     
     
         3 . The RFID antenna structure of  claim 1 , wherein the conductive surface is a hexagonal cross-sectional structure. 
     
     
         4 . The RFID antenna structure of  claim 1 , wherein the RFID inlay is capable of operating on metal surfaces when made by flat roll to roll lamination and slitting or die cutting. 
     
     
         5 . The tamper evident RFID antenna structure of  claim 2 , wherein the perforation strip is any engineered path that propagates a tear along a predetermined that is defined as any engineered weakness in the label construction 
     
     
         6 . The tamper evident RFID antenna structure of  claim 2 , wherein the label comprises no or a reduced adhesion in certain areas. 
     
     
         7 . A RFID antenna structure designed to operate in proximity to conductive surfaces, comprising:
 an RFID inlay including an antenna and a chip, the RFID inlay sandwiched between two layers of material, the RFID inlay having edges;   a metal layer; and   wherein the RFID inlay is positioned 90 degrees to the metal layer on one of the edges of the RFID inlay such that the one edge is in proximity to the metal layer and the RFID inlay and the RFID inlay has similar read performance when not in proximity to a metal layer.