Patent ID: 7973661
Filing Date: 2011-07-05
Classification: E05B,G06Q,G07G,G08B

Abstract:
1. A detaching unit for detaching a combination electronic article surveillance/radio frequency identification tag that is affixed to an article by a spring clamp mechanism, the tag having a tag magnetic loop antenna, the detaching unit comprising: a placement region for receiving the electronic article surveillance/radio frequency identification tag; a near field magnetic loop antenna situated proximate the placement region, the near field magnetic loop antenna magnetically coupling to the tag magnetic loop antenna, the near field magnetic loop antenna is substantially circular, includes a substrate material having a relative dielectric constant, and has a diameter “d” in which wherein “c” is the speed of light, “f” is the UHF operating frequency, and “∈ r ” is the relative dielectric constant of the substrate material; and a detacher, the detacher releasing the electronic article surveillance/radio frequency identification tag from the article based on a received radio frequency identification response signal.