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Abstract

A device for generating fluid drops, preferably in a demand controlled ink jet printer which has a rod (3) of magneto-strictive material surrounded by a magnetization coil (4). One end (3a) of the rod is fixedly secured to a stationary portion (1a) of the device. The second, free end (3b) extends via a fluid-sealing leadthrough (5) into a fluid chamber (6) in the device to a position in the vicinity area of the outlet opening (8) of said fluid chamber. When actuating the magnetization coil by feeding an actuation current thereto, the magneto-strictive rod generates an ultrasonic pressure wave in the fluid at the outlet opening of the fluid chamber (6), which in turn causes an ejection of a fluid drop from said outlet opening (8).

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First Claim