A card socket assembly includes a main body, a hinge assembly; a cover rotatably assembled on the main body by the hinge assembly; and a release button releasably latching the cover to the main body. Herein, use is made of three photolithographical masks for four layers. A beverage forming machine including a drain system may be self-contained in that the liquid drained from the tank is held by another tank that is part of the beverage forming machine. More specifically the shunt structure prevents magnetic field from the portion of the write coil beyond the back gap from magnetizing a magnetic shield of the read head.