Snap-disc metal foil for remote-control or portable telephone keyboard has snap-discs stamped out from metal foil in matrix positions with bridge section joining each snap-disc to metal foil

摘要

The snap-disc metal foil (1) has a number of snap-discs positioned in a matrix and formed integral with the metal foil, to which they are connected via at least one bridge section, with a thickness allowing limited displacement of the snap-disc with flexure of the bridge section within its elastic limits. Independent claims are also included for the following: (a) a manufacturing method for a snap-disc metal foil; (b) a manufacturing device for a snap-disc metal foil