Patent ID: 6618939
Filing Date: 2003-09-16
Classification: B32B,G06K,G08B,H01F,H05K,Y10S,Y10T

Abstract:
A process for producing a resonant tag,wherein resonant circuits having a wide width are applied to both faces of a base sheet such that a first circuit and a second circuit face each other with a base sheet in between, said process comprising: stamping out a metal foil having a thermal adhesion adhesive applied to at least one side thereof into a predetermined shaped foil circuit while passing through a die roll having thereon a stamping blade with a predetermined circuit shape and a transfer roll contacting the die roll and functioning also as a die backup roll; holding only the stamped-out metal foil circuit obtained by stamping out operation onto a first surface of the transfer roll by suction holes formed in the transfer roll, the width of the circuit enabling said circuit to be supported against said first surface by said suction holes; and thermally adhering the stamped-out predetermined shape metal foil circuit to the base sheet in contact with the transfer roll at one surface by an adhesive roll in contact with the transfer roll at a second surface through the base sheet, by using the thermal adhesive adhesion, wherein the width of the metal foil circuit is wide in width within the scope where a resonant property is formed, the suction holes formed in the transfer roll are smaller than the width of the metal foil and an appropriate number of suction holes are formed in said transfer roll so as to correspond in shape to the metal foil to be stamped out, the base sheet is a dielectric film, and another metal foil circuit as prepared above adhered on the other surface of the base sheet, one surface of which is adhered with the metal foil circuit, by the above-mentioned process.