Search coil assembly for metal detectors
US4902997A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 1989 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | May 30, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A coil assembly for a metal detector of the type used for detecting metal fragments in foodstuffs and pharmaceuticals, the coil assembly comprising a frame of non-metallic material, the frame having an aperture therethrough for the passage of material undergoing inspection, coils of electrically conductive strands wound upon the frame, a first plastic coating adhered to the frame and coils, less the aperture portion of the frame, a layer of metal adhered to the first plastic coating to encase the first plastic coating in the metal layer, and a second plastic coating adhered to the metal layer to encase the layer in the second plastic coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.