A process for producing a resonant tag, wherein a
metal foil having a thermal adhesion
adhesive applied to at least one face thereof is stamped out into a circuit-like shape and is adhered to a base sheet, the process comprising:
stamping out the
metal foil into a predetermined shaped
metal foil portion (4c) while being passed through a die roll (1) having thereon a
stamping blade with a predetermined shape and a transfer roll (2) in contact with the die roll (1) which functions also as a
die back-up roll; holding this
metal foil portion obtained by the
stamping-out operation onto the surface of the transfer roll by suction holes formed in the transfer roll; and thermally adhering the stamped
metal foil portion to the base sheet (7) in contact with the transfer roll (2) at its another face by an
adhesive roll (3) in contact with the transfer roll through the base sheet. The present invention has such advantages as no damage to the base sheet since the stamping-out operation for the
metal foil and the thermal adhesion operation thereof to the base sheet are carried out in separate positions, and no requirement of carrier sheet because the
resultant metal foil portion obtained by the stamping-out operation is sucked and held onto the surface of the transfer roll.