Abstract: A print head has a reduced power size or increased print speed that can be operated at a lower voltage or higher speed and can maintain high-quality output printing free from thinned portions. During intervals between printing operations while a print paper is being fed, pulses are applied to all print electrodes to maintain a uniform potential difference between each of the print electrodes and a counter electrode so that an electric charge is supplied to the ink meniscus. Consequently, a sufficient Coulomb force to permit ink droplets to be ejected is obtained. Therefore, during printing operations, the supplied energy can be reduced and electric charge on the ink surface can be retained. Hence, ink droplets can be ejected stably without nonuniformities.

Abstract: A recording head has a head portion having a common electrode, an ink chamber for storing ink, and an ink ejection port. A counter electrode is disposed opposite to and spaced-apart from the common electrode and proximate the ink ejection port of the head portion to form a gap between the counter electrode and the ink ejection port for receiving a recording medium. The counter electrode has recording electrodes extending generally perpendicular to a lengthwise direction of the common electrode. A power source applies a voltage between the common electrode and the counter electrode to generate an electric field therebetween. A control circuit independently controls the voltage applied to each of the recording electrodes to generate an electrostatic force for electrically charging the ink disposed in the ink chamber so that the electrically charged ink flows from the ink chamber, is ejected through the ejection port, and is outputted onto the recording medium.

Abstract: In an ink jet recording head for an ink jet recording apparatus, insulating members are arranged between adjacent ones of a plurality of recording electrodes so that electric discharge is made less likely to occur across the recording electrodes. Thus, even where the density of the recording electrodes in the head is set high in order to achieve high resolution, ink can be stably jetted. Further, the ink can be supplied to the front end of the head without increasing a static pressure which acts on the ink in such a manner that the insulating members are disposed only in the vicinities of the front ends of the recording electrodes while the discharge withstand voltage across the adjacent recording electrodes is increased.

Abstract: A printer equipped with a print head that can be operated at a lower voltage or at a higher speed is offered. The print head permits reduction in size of the power supply or increase in the print speed. The printer can maintain high-quality output printing free from thinned portions. During intervals, paper is fed, and charge supply pulses are applied to all print electrodes to give a uniform potential difference between each of the print electrodes and the counter electrode. In this way, electric charge is previously supplied to the ink meniscus. Consequently, a sufficient Coulomb force to permit ink droplets to be squirted is obtained. Therefore, during operation, the supplied energy can be suppressed. Under every circumstance, the electric charge on the ink surface can be retained. Hence, ink droplets can be squirted stably without nonuniformities.

Abstract: By manipulating a relative potential relationship of potentials by voltages applied to selected electrodes, nonselected electrodes and an opposed electrode 20 among a plurality of record electrodes 13a through 13z installed at vicinities of an opening portion 11 of a head, ink is injected, printing of high resolution is made possible and by using a dispersing type ink and changing polarities of the voltages applied to the opposed electrode 20 and the record electrodes, density of injected ink is made variable.

Abstract: In order to eliminate the unnecessary power consumption caused by the increase in frequency associated with wireless communication systems using electromagnetic induction techniques, the wireless communication system of the present invention modulates and transmits a magnetic field in accordance with information. A close-range receiver is provided with an amorphous magnetic impedance element having an impedance which varies in accordance with the modulated characteristic of the magnetic field. Use of an amorphous magnetic impedance element in the receiver results in a reduction in power and increase in sensitivity of the device.

Abstract: A method of simultaneously producing a plurality of thermal heads having a ridge-shaped glaze structure uses first and second glass pastes, the second glass paste having a higher softening temperature than the first glass paste. The first glass paste is printed on a substrate in a pattern having a plurality of adjacent slit-shaped openings in parallel. Next, the second glass paste is printed in a pattern having independent bands which cover the openings. The first and second glass pastes are melted and hardened simultaneously by heat treatment so as to form the ridge-shaped glaze structure. A plurality of isolated individual resistors are formed linearly along the crest of the ridge-shaped glaze structure, and a plurality of isolated individual traces are formed which connect at one end to each of the resistors. Lastly, the substrate is divided along separation lines into a plurality of thermal heads having a ridge-shaped glaze structure.

Abstract: A method and apparatus are applicable to a thermal recording system which records data in a recording medium using a heat generated by applying a power to a resistor. According to the invention the resistor itself or a monitor, which is disposed in the path of electric current applied to the resistor, is made of a material having the metallic/non-metallic phase transition characteristics at predetermined temperature, whereby the resistor or the monitor can have a function to interrupt the electric current at the predetermined temperature so that the peak temperature of the resistor s controlled constantly regardless of the value or period of the applied voltage. Further, it achieves a uniform recording property and a stable continuous tone recording property by controlling the period for holding the peak temperature of the resistor.

Abstract: The thermal head is comprised of several blocks each containing a plurality of heating elements. Each heating element has a pair of first and second lead electrodes which extend in the same direction from the heating element. The first lead electrodes are connected through corresponding switching elements to a first common electrode within each block. The second lead electrodes are directly connected to a second common electrode disposed adjacently to the first common electrode. The first and second common electrodes have a substantially identical tapered shape, and they are tapered in opposite directions to each other. The second lead electrodes are arranged to connect to one side of the tapered shape of the second common electrode.