Abstract: An ink-supplied wire dot matrix printer head for actuating wires with ink attached to tip ends thereof into contact with a sheet of print paper to transfer ink to the sheet, thereby forming ink dots thereon. The ink-supplied wire dot matrix printer head includes a wire guide member having a wire guide hole for guiding the tip end of the wire, and an ink tank containing an ink absorbing body therein and having an ink supply port in which a portion of the wire guide member is inserted. The wire guide member has a capillary ink path communicating with a side of the wire and supplied with ink from the ink absorbing body.

Abstract: An ink jet print head is provided having a nozzle forming substrate with a plurality of nozzles formed therein. Vibrators formed on a piezoelectric transducer disposed within the ink jet print head opposite the nozzles are independently drivable. A first gap is formed between the nozzle forming substrate and a vibrator in a region adjacent the nozzles. A second gap is formed between the nozzle forming substrate and a vibrator at a region away from the nozzles having a different dimension than the first gap.

Abstract: A wire dot printer that requires no cover over the wire portion of the printer head when not in service in order to prevent ink drying is constructed using an ink supply devoid of water. The ink composition used in such an ink wire dot printer contains a water soluable dyestuff or an oleaginous dyestuff which is soluable in a polar solvent, a polyhydric alcohol or a derivative thereof and a water soluable amine.

Abstract: A wire dot printer comprises a plurality of wires for carrying ink respectively on the ends thereof, and ink applicator mechanism applying the ink to the wire, and an ink heater unit disposed adjacent to the wire ends for heating the ink to a controlled temperature level. The ink is applied to the side surfaces of the wires and is drawn to the wire ends by capillary attraction.

Abstract: A wire dot printer using fluid ink in which printing is carried out with the ink adhering to the end faces of the wires. A front wire guide guides the end portions of the wires adjacent to the printing end faces of the wires. A rear wire guide is positioned behind the front wire guide. An ink path fed by capillary action is provided between the front and rear wire guides which crosses the wires at positions adjacent the end faces of the wires. Also disclosed is a pump for conveying the ink within the printer and preferred compositions of the ink itself.

Abstract: A manually operated dot printer designed for use in a pocket sized calculator or a small sized electronic device includes a printing head which is manually movable across a sheet of printing paper in one direction. A pulse generating circuit produces a signal in synchronization with the speed of travel of the printing head. While the printing head is moving in said one direction, the printing head effects electrically controlled printing operations with dots in response to the signal produced by the pulse generating circuit. As the printing head is advanced, spring means store energy which is applied to return the printing head and advance the printing paper.