Method and apparatus for protecting culinary products
View Patent ↗A microwave-resistant and waterproof security tag for use with food products, especially meat products. The security tag includes a pair of single, open loop conductive traces in between which is disposed a similarly-shaped dielectric layer. This combination is encapsulated within plastic membranes or covers that are sealed at their common edges. The preferred embodiment includes rectangularly-shaped single, open loop conductive traces with rounded corners and with one end of each trace forming a capacitor plate. The width of each trace is at least 1/10 of the length of the security tag.
1. A method for providing a security tag associated with meat or fish product packaging having a soaker pad therein and a label on the packaging, and wherein said method minimizes a risk of the security tag arcing if the meat or fish product packaging is placed within a microwave, said method comprising:
forming a first single open loop conductor having rounded corners using a first conductive trace on a substrate;
positioning a single open loop dielectric layer on top of said first conductive trace;
positioning a second conductive trace comprising a second single open loop conductor having rounded corners on top of said dielectric layer;
electrically-coupling said first and second conductive traces by penetrating said dielectric layer at a given location; and
encapsulating said first conductive layer, said dielectric layer and said second conductive layer within plastic layers.
2. The method of claim 1 further comprising a step of positioning said security tag within the soaker pad.
3. The method of claim 1 further comprising a step of securing said security tag to the label on the packaging.
4. The method of claim 1 wherein said steps of forming a first single open loop conductor and a second single open loop conductor having rounded corners comprises forming at least three rounded corners in said first conductive trace and said second conductive trace.
5. The method of claim 4 wherein said step of forming at least three rounded corners in said first and second conductive traces comprises forming four rounded corners on each conductive trace and wherein one of said corners forms a capacitor plate.
6. The method of claim 1 wherein said steps of forming a first single open loop conductor and a second single open loop conductor having rounded corners comprises forming each of said rounded corners using a radius of curvature of approximately 0.15 inches.
7. The method of claim 1 wherein said steps of forming a first single open loop conductor and a second single open loop conductor comprises forming each of said conductors using a ratio of width to length of at least 1 to 10 .
8. The method of claim 1 wherein said step of encapsulating said first conductive layer, said dielectric layer and said second conductive layer within plastic layers comprises:
adhesively securing a first plastic layer over said first conductive trace to form a first overlap region;
adhesively securing a second plastic layer over said second conductive trace to form a second overlap region; and
sealing together said first overlap region and said second overlap region.
9. The method of claim 1 wherein said step of electrically-coupling said first and second conductive traces by penetrating said dielectric layer at a given location comprises crimping.