Methods for the making of electronic article surveillance tags and improved electronic article surveillance tags produced thereby
US5494550A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 7, 1993 |
| Grant date | Feb 27, 1996 |
| Priority date | — |
| Expiry date | Sep 7, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1085
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An improvement in a method for the manufacture of electronic surveillance tags by providing a continuous web of electrically insulative material, applying to opposed surfaces of the electrically insulative material web a succession of first and second electrically conductive coils and applying to the succession of first electrically conductive coils a normally electrically insulative deactivation structure extending across the first coil succession and convertible to be electrically conductive, the improvement comprising the step of providing an electrostatic charge drain in electrically conductive relation with each of the first electrically conductive coils substantially throughout the manufacture of the tags. The new step may be practiced by providing an elongate electrically conductive member across the succession of first electrically conductive coils in electrical continuity therewith. Alternatively, the step may be practiced by configuring the succession of first coils integrally with the electrostatic charge drain. In either case, the drain is removed in a final stage of tag manufacture. Other improvements are also set forth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.