A magnetic head and a recording apparatus employing the same are provided. The invention enables users to be able to realize faster and stronger permeable contents infusion, realize multiple servings of strong flavored beverages from one disposable serving, improve the cleanliness and efficiency of saturated beverage bag handling and disposal and provides a means to deliver other experience enhancing products andor information. If the receiver has a public key, the messages will be sent to the receiver using a standard public-key based encryption. under an inert atmosphere; and thermal heating the self-cross-linked aromatic polyimide polymer membrane at a temperature from about 350\xb0 to 500\xb0 C. The pivoting support bracket has a cam follower which engages and follows the cam track, so that pivoting of the support bracket is responsive to the shaping of the cam track.