Tag web of spiral conductors

Details Tag web of spiral conductors Tag web of spiral conductors

1987-10-23

1989-06-27

Hille, Rolf

Communications: radio wave antennas

Antennas

Spiral or helical type

333175, 333185, 340572, H01Q 136, G08B 1318

Patent

active

048434043

ABSTRACT:
This invention relates to a tag useable with an electronic article surveillance system and comprises of planar conductive material cut into a pair of inverse, first and second spiral conductors wrapped about each other and positioned for capacitive and inductive coupling. The invention also relates to method of making tags wherein conductors are cut from a planar web of conductive material in a continuous process in a manner that the cutting results in the formation of two spiral conductors without accompanying waste of conductive material, and thereafter positioning the conductors to provide resonant circuits.

REFERENCES:
patent: 3436687 (1969-04-01), Andrews et al.
patent: 4598276 (1986-07-01), Tait
patent: 4658264 (1987-04-01), Baker

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