Patent ID: 6575669
Filing Date: 2003-06-10
Classification: G01H,G10K

Abstract:
A method for transferring an object levitated above a transporting vibrator from the transporting vibrator to a platform, wherein the transporting vibrator generates sound waves to produce a transporting levitating force that levitates the object, the method comprising:arranging the platform at a predetermined position below the object, wherein the platform is provided with an unloading vibrator, the object has a bottom surface, the unloading vibrator has a top surface, and the predetermined position is determined so that the distance between the top surface of the unloading vibrator and the bottom surface of the object is less than one half the wavelength of a standing wave generated by the unloading vibrator; moving the platform upward toward the object from the predetermined position; levitating the object above the platform when moving the platform upward, wherein the unloading vibrator generates sound waves to produce an unloading levitating force that levitates the object; and moving the object levitated by the platform to a position at which the transporting levitating force does not affect the object.