Patent ID: 7665687

Claim:
A drum for storing and dispensing a coiled material wound on the drum, said drum comprising: a drum body having a hub and side walls respectively disposed at axial end faces of the hub, said side walls extending beyond an outer circumferential surface of the hub in the radial direction, wherein a storage space is defined by inner facing surfaces of the side walls and the hub and extending circumferentially around the hub, the storage space being capable of accommodating the coiled material, the drum body having at least one dielectric region capable of accommodating at least one transponder on an area of the hub facing away from the storage space for the coiled material, the hub is a double-walled structure, the dielectric region is within the double walls, the double-walled structure comprises arcuate shells about the hub at a distance from an outer circumferential surface thereof, and the arcuate shells each have at least one spacer member on an inner circumferential surface thereof facing the hub.