| 摘要 |
An EAS marker and method of manufacturing same. In a preferred embodiment, the EAS marker comprises a rigid bottom piece of molded plastic having the shape of an open rectangular box. An elongated resonator is disposed in the bottom piece, the resonator being bowed downwardly about its longitudinal axis. A rigid separator of molded plastic is positioned over the open top of the bottom piece, thereby loosely encasing the resonator in the bottom piece. The foregoing bottom piece, resonator and separator are all positioned within the cavity of a rigid top piece of molded plastic having the shape of an inverted open rectangular box, the separator being press-fit against the interior surface of the top wall of the top piece, the bottom piece being press-fit against the interior surfaces of the side walls and end walls of the top piece. The top wall of the top piece is provided with a recessed area in which a biasing element is disposed, the biasing element being retained in the recessed area by the separator. The separator is shaped to include a projection that extends downwardly beyond the remainder of the bottom surface of the separator, the projection being sized and shaped to contact the top of the resonator only within a circular area approximately 0.1 inch in diameter located in approximately the middle of the resonator. The present invention is also directed to an automated method and apparatus for manufacturing the above EAS marker. In a preferred embodiment, each of the top piece, the bottom piece and the separator is manufactured, by rotary extrusion molding, as part of a continuous web, and the various continuous webs are automatically laminated to one another at nips between pairs of rollers.
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