| 摘要 |
A coil assembly for a metal detector and a method for making the coil assemblies for metal detectors of the type used for detecting metal fragments in foodstuffs and pharmaceuticals, the method comprising providing a frame of non-metallic material, the frame have an aperture therethrough for the passage of material undergoing inspection, winding coils of electrically conductive strands on the frame, applying plastic in liquid form to the frame and coils, less the aperture portion of the frame, and applying metal in fluid form to the plastic to encase the plastic in a metal layer. |
