Abstract: A head is provided with a driving signal line having a driving terminal for receiving a driving signal sent from an apparatus to the head, and an identification terminal. The driving signal line is electrically connected to the identification terminal. With the use of the driving signal line and the identification terminal, the head is identified.

Abstract: In a driving method of an ink-jet recording head, heat is generated by applying a drive signal to a heating element, and this heat is applied to ink to generate a bubble and discharge the ink through a discharge outlet. The drive signal comprises a first drive signal for storing foaming energy in the ink, and a second drive signal for generating a bubble in the ink. The second drive signal has a signal time shorter than the boundary foaming time at which foaming energy decreases in a case of performing foaming only by the second drive signal. The first drive signal is applied prior to the second drive signal in order to compensate for a decrease in foaming energy.

Abstract: An ink-jet head includes a plurality of ink channels for guiding ink to corresponding discharging ports, and discharging units, each including a discharging port, and a heating element, provided for the discharging port, for generating a bubble for discharging the ink by providing the ink within the corresponding ink channel with thermal energy. A plurality of discharging units having different amounts of ink discharge are provided at each of the ink channels. An ink-jet-head cartridge includes the above-described ink-jet head and an ink receptable for holding the ink to be supplied to the ink-jet head. An ink-jet apparatus includes the above-described ink-jet head and a recording-medium conveying unit for conveying a recording medium for receiving the discharged ink.

Abstract: An ink liquid fixing device used for an ink jet recording apparatus for discharging ink liquid onto a recording medium arranged on a given feeding path for the formation of images on the medium includes a housing, a first aperture for inducing air into the housing, a second aperture having a width wider than that of the recording medium arranged on the feeding path, this second aperture being arranged to face the recording surface of the recording medium arranged on the feeding path with given gaps formed between them on the upstream and downstream sides in the feeding direction thereof, a heat emitting source facing the recording surface of the recording medium through the second aperture side portions arranged around the heat emitting source, with the first aperture being arranged on one end and the second aperture on the other end thereof, and exhaust means for inducing the air outside the housing into the housing through the first aperture to guide the air to the recording surface of the recording medium

Abstract: A liquid ejecting method using a liquid ejecting head having electrothermal transducer elements for generating thermal energy sufficient to create bubbles in liquid and ejection outlets disposed opposed to the electrothermal transducer elements which are arranged at a density not less than 300 per 25.

Abstract: An ink-jet head includes a plurality of ink channels for guiding ink to corresponding discharging ports, and discharging units, each including a discharging port, and a heating element, provided for the discharging port, for generating a bubble for discharging the ink by providing the ink within the corresponding ink channel with thermal energy. A plurality of discharging units having different amounts of ink discharge are provided at each of the ink channels. An ink-jet-head cartridge includes the above-described ink-jet head and an ink receptable for holding the ink to be supplied to the ink-jet head. An ink-jet apparatus includes the above-described ink-jet head and a recording-medium conveying unit for conveying a recording medium for receiving the discharged ink.

Abstract: The ink jet print head according to this invention comprises: a plurality of nozzles; a plurality of electrothermal transducers provided one for each of the plurality of nozzles, the electrothermal transducers being adapted to eject ink supplied into the nozzles when energized; an energization start means to start energizing the electrothermal transducers; a voltage detection means to detect a voltage applied to the electrothermal transducers after starting the energization; and an energization stop means to stop the energization of the electrothermal transducers according to the voltage detected by the voltage detection means.

Abstract: A liquid jet recording method of recording on a recording material with liquid droplets discharged trough plural scanning nozzles, in which: n/(s/p)≧2 n/(s/p)×k=g−1 are satisfied, where n (n≧2) is a number of the nozzles arranged at pitch P (&mgr;m); s (&mgr;m) is a distance of relative movement between the nozzles and the recording material between adjacent scans; k (k≧1) is a maximum number of ink droplets per pixel and per scan; g (g≧3) is a number of tone levels.

Abstract: An image corresponding to a single sheet of recording paper is divided into three decomposed images each having the substantially same expansion as that of the image, and one of the decomposed images is recorded on the recording paper while a drum is rotated and the recording head is continuously moved at a distance corresponding to a width of the recording head. Subsequently, other decomposed images are successively recorded on the recording paper. Thus, recording of the respective decomposed image is performed at a predetermined time interval kept between two continuous recordings. The foregoing time interval can be used as a time required for ink permeation into the recording medium.

Abstract: An ink jet recording apparatus includes an ink jet recording head as an essential component, and the ink jet recording head has a wiring structure which assures that a quantity of electricity loss induced by wiring resistance can be reduced. A plurality of substantially rectangular heaters 2 are formed at the positions in the vicinity of one end edge 1a of a device substrate 1 while they are arranged in an array in parallel with the one end edge 1a of the device substrate 1 with a predetermined distance held between adjacent heaters 2. Each heater 2 is composed of heaters 2a and 2b in the form of a pair. A common wiring portion 3 made of a metallic material such as aluminum or the like is formed between a pair of heaters 2, and it is electrically connected to electrodes of the heaters 2 on one side of the latter on the common basis.

Abstract: Each of branched ink supply passages 42ai to 42an and 42bi to 42bn in a driving substrates 32 is constituted of a parallel passage portion 46a and a narrow passage portion 48a. An ink from an ink supply opening 32a is supplied to a receptacle portions 50 respectively receiving heater portions 32ai to 32an and 32bi to 32bn via the branched ink supply passages 42ai to 42an and 42bi to 42bn.

Abstract: A substrate for a recording head includes a heat generating resistor for generating thermal energy to eject liquid, and a pair of opposed electrodes which are electrically connected to the heat generating resistor to supply electric signal to that heat generating resistor. A portion of the heat generating resistor interposed between the electrodes constitutes a heat generating portion, and the electrodes have respective ends adjacent to the heat generating resistor, each of which ends has a smooth convex shape. The width of a pattern constituting the heat generating resistor is greater than a width of a pattern constituting the electrodes.

Abstract: There is disclosed an ink jet head comprising plural discharge energy generating elements for generating energy to be used for discharging ink droplets, ink discharge openings for discharging the ink droplets, a substrate bearing thereon an array of the plural discharge energy generating elements and an ink supply aperture consisting of a penetrating hole extending along the direction of array of the discharge energy generating elements, and an orifice plate provided with the ink discharge openings, in which the substrate and the orifice plate are mutually adjoined to define therebetween ink paths connecting the ink discharge openings and the ink supply aperture, wherein the orifice plate comprises plural projections in a position corresponding to the ink supply aperture.

Abstract: An ink jet recording head has an energy generating device line constituted by electrically connecting N (N>1) energy generating devices in series. The energy generating devices are disposed to correspond to a plurality of discharge ports for discharging ink and generate discharging energy. The energy generating device line is operated by using substantially N+1 electrodes. The method of operating an ink-jet recording head comprises the steps of: successively selecting the energy generating devices of the energy generating device line; applying voltages of different levels to the two terminals of the selected energy generating device having received an image signal instructing the selected energy generating device to discharge the ink; and applying voltages of the same level to the two ends of the energy generating device which corresponds to the discharge ports which are not to discharge the ink.

Abstract: A fluid ejection head comprises a heater disposed in a fluid path. A bubble is generated by supplying electric power to the heater, and ink is ejected in a direction substantially parallel to a face of the heater. The fluid path is shaped to have a first part with a constant-sectional area adjacent to an ejection orifice a second part located behind the first part and containing the heater. The cross-sectional area of the second part increases by twice as large as the cross-sectional area of the ejection orifice, a length (A) between an end of the first part of the fluid path and a top end of the heater is greater than or equal to half of the height Ph of the ejection orifice, and a shortest gap between the ejection orifice and the heater is less than or equal to a sum of a half of the height Ph of the ejection orifice and a length (L) of the first part of the fluid path.

Abstract: A radial tire has a pair of bead portions; a carcass which is toroidal and extends across the bead portions; a tread portion positioned at a crown portion of the carcass; and sidewall portions of the carcass, and at least one belt reinforcing layer is disposed at the entire tread portion and/or at both end portions of the tread portion at an outer peripheral side of at least two belt layers which are disposed at an inner side of the tread portion, the belt reinforcing layers being formed by narrow, rubber-coated strips, which include a plurality of fiber cords, being wound endlessly in spirals so that the fiber cords are substantially parallel in a circumferential direction of the tire, wherein the belt reinforcing layer cords comprise organic fiber cords, the elongation of the organic fiber cords under 1.4 g/d load at 50.+-.5.degree. C. is less than or equal to 2.7%, and the elongation under 0.7 g/d load at 170.+-.5.degree. C. is 1.5 to 6.0%.

Abstract: A system and method for driving a carriage of a serial printer. The printer is operated such that Fourier components of a speed in one reciprocal movement of the carriage can be expressed by Fourier components of lower degrees. At the same time, carriage vibrations can be suppressed, and printing can be performed at high speed. Almost no approach range is assured, and the printer can be made compact.

Abstract: An organic fiber cord for rubber reinforcement satisfies relationships of S1.gtoreq.2.5, S2.ltoreq.1.8 and S2.ltoreq.S1-2.0 wherein S1 and S2 are dry heat shrinkage factors under particular conditions in order to improve the durability and dimensional stability of rubber articles without the degradation of other properties in the rubber article. When such an organic fiber cord is applied to a carcass ply of a pneumatic radial tire, the tire durability and uniformity are considerably improved.

Abstract: There is provided a driving method for an ink jet head comprising one or more discharge ports for discharging the ink, a substrate incorporating one or more heat generating elements for generating the heat energy, each of which is provided correspondent to each discharge port, and a support plate or casing on which the substrate is mounted. The method is characterized in that when recording an image with the ink jet head in which the heat energy for discharging the ink in accordance with an image signal is generated in the heat generating elements, and the thermal resistance value passing through said support plate or casing is lower than that not passing through the support plate or casing among the thermal resistance between the substrate and externally of the apparatus (E.sub.max -E)/(V.sub.max -V) is controlled to be always substantially constant whenever E.noteq.E.sub.max, providing that the thermal energy generated in the substrate is E.sub.

Abstract: A liquid jet recording method for recording on a recording material with liquid droplets discharged through plural scanning nozzles arranged in a width measured in a direction of main scan. The recording method includes a first main scan by relative movement between the nozzles and the recording material, in which pixels are recorded with numbers of droplets through a nozzle, the numbers of droplets corresponding to respective tone signals. The method also includes a sub-scan by relative movement between the nozzles and the recording material in a direction crossing with a movement direction of the first main scan. The method further includes a second main scan in which the pixels are recorded with numbers of droplets through a different nozzle, the latter numbers of droplets corresponding to tone level signals. The sub-scan and second main scan steps are repeated to record a tone image by discharging plural droplets for a pixel.