Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1989-09-11
1990-09-04
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
156152, 333175, 361402, G08B 1324
Patent
active
049548140
ABSTRACT:
This invention relates to a deactivatable tag useable with an electronic article surveillance system and comprised of planar conductive material cut into a pair of inverse, first and second spiral conductors wrapped about each other and positioned for capacitance 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. The conductors of each pair are connected by welding to provide a reliable circuit. A deactivator includes a composite strip with a conductive layer, a normally nonconductive layer adhered to the conductive layer, and a coating surrounding the adhered layers which is positioned in proximity to the resonant circuit so that, when excess energy is applied to the deactivator, the normally non-conductive layer becomes conductive and the coating is rendered ineffective whereby the resonant circuit is deactivated.
REFERENCES:
patent: 4021705 (1977-05-01), Lichtblau
patent: 4567473 (1986-01-01), Lichtblau
patent: 4717438 (1988-01-01), Benge et al.
patent: 4778552 (1988-10-01), Benge et al.
Grass Joseph J.
Monarch Marking Systems, Inc.
Swann III Glen R.
LandOfFree
Tag and method of making same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tag and method of making same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tag and method of making same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-444549