Contact-free electronic label for product with conductive surface

• US 6,950,023 B1
• Filed: 09/11/2001
• Issued: 09/27/2005
• Est. Priority Date: 09/22/2000
• Status: Expired due to Term

• Current Assignee: Gemalto SA (Thales SA)
• Original Assignee: Gemplus (Thales SA)
• Inventors: Martin, Philippe
• Primary Examiner(s): Hofsass, Jeffery
• Assistant Examiner(s): Previl, Daniel
• Application Number:
  US10/381,022
• Time in Patent Office: 1,477 Days
• Field of Search: 340/572.7, 340/572.8, 340/572.1, 340/572.2, 340/572.3, 340/572.4, 340/572.5
• US Class Current: 340/572.7
• CPC Class Codes: G06K 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
• CPC Class Codes: G06K 19/07767 the first and second communication means being two different antennas types, e.g. dipole and coil type, or two antennas of the same kind but operating at different frequencies
• CPC Class Codes: G06K 19/07771 the record carrier comprising means for minimising adverse effects on the data communication capability of the record carrier, e.g. minimising Eddy currents induced in a proximate metal or otherwise electromagnetically interfering object

Abstract

A contact free electronic label, such as those designed to be affixed on conductive surfaces, has an insulating support one side of which bears a first winding having its ends connected to an electronic circuit. The opposite side of the support bears a second winding whose ends are connected to conductive pads. This opposite side of the support is designed to be secured to a conductive surface via an insulating dielectric layer. The labels are designed to be affixed on products having conductive surfaces such as laser discs, gas bottles and the like.

Claims

1. A contactless electronic label intended to be secured to a conductive surface comprising an electrically insulating support having one face that bears an integrated circuit associated with a first conductive antenna winding for producing a contactless electronic label, and an opposite face that bears a second conductive winding having each end connected to a conductive pad said opposite face being adapted to be secured to said conductive surface by means of an insulating dielectric layer.

2. A contactless electronic label according to claim 1, wherein said insulating support comprises two insulating supports having opposed faces which are secured to one another.

3. A contactless electronic label according to claim 2, wherein the opposing faces of the two insulating supports are secured to one another by an insulating adhesive layer.

4. A contactless electronic label according to claim 1, wherein the insulating dielectric layer is an adhesive layer.

5. A contactless electronic label according to claim 4, wherein said adhesive layer is covered with a detachable protective sheet.

6. A contactless electronic label according to claim 1, wherein a tuned circuit comprising the first conductive antenna winding and a tuned circuit comprising the second conductive winding have tuned frequencies which are close to one another.