Abstract: A fluid jet printing device has a source (6 to 10) for supplying fluid under pressure to a printer head (1). The source consists of an interchangeable, pressure-tight, inflexible container (6) filled with pressurizing gas and printing fluid. The container is detachably connected to an inlet port connected to a pressure reducing valve for supplying the fluid under constant pressure to the printer head. Preferably, the fluid container has the form of a spray-dispenser of a `throw-away` type, as known for hairsprays or the like.

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).

Abstract: The present invention relates to a fluid jet printing device A to U having an inlet 14, an outlet nozzle 13 and a valve 3, 5 located between the inlet and the outlet. The valve comprises a movable actuation member 3 cooperating with a valve seat.For enhancing the drop generation frequency, a diaphragm-like partition wall PW is arranged between the inlet and the outlet. Said partition wall includes the valve seat VS.

Abstract: A printing device adapted to print a bar code on a moving information carrier, preferably in the form of a label for marking an article or packaged goods, said bar code consisting of a plurality of parallel bar imprints of different widths separated by spacings lying therebetween. The invention is characterized in that there is provided one single printing member for all of the bar imprints of the bar code, the imprint width of said printing member being not greater than the smallest width of any bar imprint appearing in said bar code, and said printing member being operatively connected to an actuating unit coupled to a programmable control unit, which is adapted to generate control signals at small enough time intervals to form bar imprints of larger width by juxtaposing of bar imprints of the width of said printing member without intervening spacings.