Abstract: A liquid discharging head improved in heat dissipation property includes a rectangular recording element substrate having electrothermal transducers generating thermal energy for discharging liquid, first electrodes for supplying electrical signals to the electrothermal transducers, and second electrodes not used for supplying electrical signals to the electrothermal transducers, and a wiring sheet having an opening through which the recording element substrate is exposed, the wiring sheet being provided with a first wiring pattern electrically connected to the first electrodes and a second wiring pattern connected to the second electrodes. A plurality of the first electrodes are formed along a first side of the recording element substrate having a predetermined length and a plurality of the second electrodes are formed along a second side of the recording element substrate, the second side being longer than the first side and extending in a direction transverse to the first side.

Abstract: To realize an ink jet recording head which is further improved in heat dissipation property, the ink jet recording head provided with a substrate provided with a plurality of discharging energy generating portions for discharging an ink droplet comprises: a plurality of electrical wiring electrodes for supplying electrical signals to the plurality of discharging energy generating portions provided in the substrate; a plurality of auxiliary electrodes not used for the supply of electrical signals to the plurality of discharging energy generating portions provided in the substrate, a first sheet comprising a wiring pattern electrically conductive to an electrical wiring electrode to be connected to the plurality of electrical wiring electrodes, and a second sheet comprising a wiring pattern electrically conductive to the auxiliary electrode terminal to be connected to the plurality of auxiliary electrodes, the ink jet recording head comprising a wiring sheet in which the first sheet and the second sheet are arr

Abstract: To realize an ink jet recording head which is further improved in heat dissipation property, the ink jet recording head provided with a substrate provided with a plurality of discharging energy generating portions for discharging an ink droplet comprises: a plurality of electrical wiring electrodes for supplying electrical signals to the plurality of discharging energy generating portions provided in the substrate; a plurality of auxiliary electrodes not used for the supply of electrical signals to the plurality of discharging energy generating portions provided in the substrate, a first sheet comprising a wiring pattern electrically conductive to an electrical wiring electrode to be connected to the plurality of electrical wiring electrodes, and a second sheet comprising a wiring pattern electrically conductive to the auxiliary electrode terminal to be connected to the plurality of auxiliary electrodes, the ink jet recording head comprising a wiring sheet in which the first sheet and the second sheet are arr

Abstract: To realize an ink jet recording head which is further improved in heat dissipation property, the ink jet recording head provided with a substrate provided with a plurality of discharging energy generating portions for discharging an ink droplet comprises: a plurality of electrical wiring electrodes for supplying electrical signals to the plurality of discharging energy generating portions provided in the substrate; a plurality of auxiliary electrodes not used for the supply of electrical signals to the plurality of discharging energy generating portions provided in the substrate, a first sheet comprising a wiring pattern electrically conductive to an electrical wiring electrode to be connected to the plurality of electrical wiring electrodes, and a second sheet comprising a wiring pattern electrically conductive to the auxiliary electrode terminal to be connected to the plurality of auxiliary electrodes, the ink jet recording head comprising a wiring sheet in which the first sheet and the second sheet are arr

Abstract: An ink-jet printing apparatus and suction recovery control method which can minimize reduction in throughput while maintaining a printhead in the most appropriate condition, and can reduce the amount of wasted ink. According to the suction recovery control method, a printing period of predetermined printing operation is timed, and the number of print dots formed by discharging ink from a printhead during the predetermined printing operation is counted. Based on the timed printing period and counted number of print dots, the number of print dots per unit time is calculated. Then based on the calculated number of print dots per unit time, timing of suction recovery operation is determined, and suction recovery operation of the printhead is performed according to the determined timing.

Abstract: An ink-jet printing apparatus and suction recovery control method which can minimize reduction in throughput while maintaining a printhead in the most appropriate condition, and can reduce the amount of wasted ink. According to the suction recovery control method, a printing period of predetermined printing operation is timed, and the number of print dots formed by discharging ink from a printhead during the predetermined printing operation is counted. Based on the timed printing period and counted number of print dots, the number of print dots per unit time is calculated. Then based on the calculated number of print dots per unit time, timing of suction recovery operation is determined, and suction recovery operation of the printhead is performed according to the determined timing.

Abstract: An ink-jet printing apparatus and suction recovery control method which can minimize reduction in throughput while maintaining a printhead in the most appropriate condition, and can reduce the amount of wasted ink. According to the suction recovery control method, a printing period of predetermined printing operation is timed, and the number of print dots formed by discharging ink from a printhead during the predetermined printing operation is counted. Based on the timed printing period and counted number of print dots, the number of print dots per unit time is calculated. Then based on the calculated number of print dots per unit time, timing of suction recovery operation is determined, and suction recovery operation of the printhead is performed according to the determined timing.

Abstract: An ink jet print head has plural electrothermal converting elements for generating energy used to discharge an ink droplet, plural ink discharging ports arranged above the electrothermal converting elements and discharging the ink droplet, plural ink flowing paths respectively communicated with the plural ink discharge ports and internally including the electrothermal converting elements, a substrate for arranging the plural electrothermal converting elements in a columnar shape and having an ink supplying port constructed by a through port which is connected with the ink flowing paths and extends along an arranging direction of the electrothermal converting elements, and a discharging port plate having the ink discharge ports. The ink flowing paths are formed between the substrate and the discharging port plate by junctioning the discharging port plate onto the substrate.

Abstract: An ink jet print head has plural electrothrmal converting elements for generating energy used to discharge an ink droplet, plural ink discharging ports arranged above the electrothermal converting elements and discharging the ink droplet, plural ink flowing paths respectively communicated with the plural ink discharge ports and internally including the electrothermal converting elements, a substrate for arranging the plural electrothermal converting elements in a columnar shape and having an ink supplying port constructed by a through port which is connected with the ink flowing paths and extends along an arranging direction of the electrothermal converting elements, and a discharging port plate having the ink discharge ports. The ink flowing paths are formed between the substrate and the discharging port plate by junctioning the discharging port plate onto the substrate.

Abstract: A soil remedying process for the soil contaminated with a volatile pollutant, which comprises the steps of forming in a probe a remediation site containing a microorganism which can degrade the volatile pollutant, introducing the volatile pollutant into the remediation site in the probe, and degrading the volatile pollutant by the microorganism.

Abstract: A process for remedying polluted soil which comprises the steps of injecting a liquid agent containing a microorganism into the polluted soil, and injecting a gas into a region wherein the water content of the soil became 0.6 or more times its saturation water content after the injection of the liquid agent. Using this method bioremediation of contaminated soil can be economically and efficiently carried out.

Abstract: A mixture is prepared by mixing carriers to which a substance specifically reacting on an object substance adheres with a sample containing the object substance. The mixture is irradiated by light having an intensity gradient to concentrate the carriers at and near the irradiated positions by the optical pressure of the light. The efficiency of an agglomeration reaction of the carriers is thereby increased. A qualitative or quantitative measurement of the object substance is performed by detecting a state of agglomeration of the carriers within the mixture.

Abstract: This invention measures the properties of individual particles in particle-suspended liquid by an optical technique or the like, causes the particle-suspended liquid to fall while separating the liquid into droplets containing the individual particles therein, and causes liquid droplets discharged from a nozzle to collide with the droplets from a direction differing from the direction of fall, in conformity with the properties of the particles discriminated by the measurement, so as to change the direction of fall of the falling droplets, thereby fractionating the particles.