Abstract: An ink leaking from an atmosphere communication hole of a waste ink container is guided to an end portion of the waste ink container. Electrodes are provided for shutting off an ink guide path. By this, the ink leaking through the atmosphere communication hole is inherently guided into the end portion of the container to come into contact with both of the electrodes. By contacting of the ink, a resistance value between the electrodes is varied to permit detection of ink leakage based on the variation of the resistance value. As a result, ink leakage from a waste ink container employed in an ink-jet printer or so forth can be certainly detected. Also, sealing ability of the waste ink container can be enhanced.

Abstract: A common recess, grooves, and common recess and/or column members in the grooves are formed on a base board at the same time, and such board is made a second base board, which is coupled to a first base board on which elements for liquid discharging energy are formed; hence obtaining an ink jet recording head provided with a filter unit in an arbitrary position in the region formed by the ink paths and the common liquid chamber. The filter unit can be processed by a single processing in the ink paths and/or the common liquid chamber to make it possible to prevent disabled discharge from taking place due to dust particles intermingled at the time of head manufacture. In this way, the discharging stability is enhanced, making a high-speed printing possible. A workpiece is efficiently processed by a single processing which is performed to process a three-dimensional configuration with respect to the direction in which the laser beam is irradiated.

Abstract: An ink jet recording head for effecting recording with ejection of ink includes a plurality of element substrates each having a plurality of ejection energy generating elements for ejecting the ink; a base plate for supporting the plurality of element substrates on one surface thereof in an array; a grooved member having a length corresponding to a length of the array and having passages corresponding to the ejection energy generating elements of the plurality of element substrates.

Abstract: A liquid jet recording apparatus utilizes a removable recording head that stores its operation data. The apparatus includes a carriage, a detector, a read-out device and a controller. The carriage removably mounts the recording head. The detector detects mounting of the recording head on the carriage. The read-out device reads out the operation data of the recording head mounted on the carriage in response to detecting of mounting by the detector. The controller sense an operation condition of the recording head mounted on the carriage in response to the read-out device.

Abstract: A print head of this invention has a plurality of heater boards, and each heater board has a plurality of heating resistors, driver circuits corresponding to the heating resistors, one shiftregister for inputting serial data, a data latch circuit for latching print data input from the shift register, a pre-heat data latch circuit for latching selection data of selecting one or several of pre-heat signals input from the shift register, and a pre-heat selection circuit for selecting one or a plurality of pre-heat signals in accordance with the selection data latched in the pre-heat data latch circuit. In a print operation, one or several of the plurality of input pre-heat signals are selected to pre-heat the heating resistors, and when a main heat signal is input thereafter, the heating resistors are driven in accordance with the print data latched by the data latch circuit, thus performing the print operation.

Abstract: In an ink jet head manufacturing method wherein a plurality of substrates provided with ejection energy generating elements for generating energy for ejecting ink, are arranged on a supporting member, and a top plate is mounted on the substrate to cover all of the substrates to form ink flow paths, the improvement residing in that the supporting member is provided with recesses at a supporting portion for supporting the substrates, and an adhesive material is supplied into the recesses, and thereafter, the substrate is placed on the supporting member.

Abstract: A recording element driving unit has an electrical connecting member having a support member of electrically insulating material and electroconductive members arranged on the support member. Each electroconductive member has one end exposed on one surface of the support member and another end exposed on another surface of the support member. A recording element substrate having recording elements is connected to one exposed end of at least one electroconductive member. A driving element substrate has driving elements thereon, and each driving element has connecting portions. The driving elements are larger in number than a number of driving elements electrically connected to the recording elements and are fewer in number than the electroconductive members.

Abstract: A liquid ejecting head for a liquid ejecting apparatus for performing a recording operation by ejecting liquid from the liquid ejecting head includes as essential components a base plate having a plurality of liquid ejecting elements, and a grooved member having a plurality of grooves formed thereon corresponding to the liquid ejecting elements. The grooved member is connected to the base plate and composed of a grooved element and a supporting member. A liquid ejecting apparatus operable for performing a recording operation includes as essential components a liquid ejecting head of the foregoing type and a signal supplying unit for supplying,a series of signals to the liquid ejecting head for activating a plurality of liquid ejecting elements.

Abstract: An ink jet head for discharging ink comprises a plurality of elemental substrates having a plurality of discharge energy generating elements arranged in line for discharging ink, a grooved member having a plurality of walls joined with the plurality of elemental substrates arranged to constitute ink paths for each of the discharge energy generating elements, these ink paths being formed by joining the walls of the grooved member under pressure with the plurality of elemental substrates thus arranged, and among the plurality of walls, a plurality of ribs formed on the bottom of each wall arranged on each boundary between elemental substrates, and configured along this boundary line to abut upon each of different elemental substrates, respectively.

Abstract: An ink jet head has plural liquid ink paths, each having a discharge opening for discharging ink when energy is applied to ink in a corresponding ink path, and a common ink chamber communicating with an end of each ink path for supplying ink to the discharge openings. The discharge openings are disposed in plural groups, which are consecutively driven by simultaneously applying energy to ink paths corresponding to selected discharge openings in a given group. The ends of the ink paths are disposed in the common ink chamber in groups consecutively arranged in accordance with the driving order of the discharge opening groups, and each ink path includes a portion proximate to that end which is directed away from the next consecutively arranged ink path group. This arrangement suppresses pressure interference between the consecutively driven discharge opening groups and enables high-quality, high-speed recording in a compact recording head.

Abstract: A linear motor drive system which is substantially not influenced by deviations in shape of slits, uneveness of distribution of light, and high order high harmonic components of a sensor signal, and which comprises a linear optical encoder having high sensor accuracy and which enhances the position detecting resolution of the encoder without use of high frequency clock generator.The system comprises means for detecting the movement of the slider of the linear pulse motor by use of a linear optical encoder and means for feedback control of the motor based on the sensor signal, wherein a photodiode array is extended over a plurality of rows of slits on a scale plate; a diffuser is mounted between a light source and the scale plate, and n photodiodes are provided within one pitch of the slit, the width of one photodiode in the direction of the array is set at p.sub.0 /(n+1), and the width of a gap between the photodiodes is set at p.sub.0 .multidot.n(n+1).

Abstract: An ultraviolet-curing composition comprising an ultraviolet-curing compound having at least one carboxyl group and at least one ultraviolet-curing unsaturated bond in its molecule, a base, water, and a polymerization initiator, and having a viscosity of 10 centipoises or below.

Abstract: An ink jet head comprises a plurality of ink liquid paths in which energy generating elements are formed, a common liquid chamber communicated with the plurality of ink liquid paths, and an air chamber which is communicated with the common liquid chamber via a communication section formed at substantially a central portion of the air chamber and which ls formed along the longitudinal direction of the common liquid chamber. This arrangement of the ink jet head enables air in the air chamber to act on refilling behavior of ink in each of the ink liquid paths so that refilling in each of the ink liquid paths is not delayed.

Abstract: An ink jet recording apparatus comprises a recording head for recording on a recording medium, which recording head includes a head body member having a plurality of thermal energy generating elements to discharge liquid for recording and an orifice plate having a plurality of discharge ports for discharging liquid therethrough in response to the thermal energy generated by the generating elements. The orifice plate includes a junction portion attached to the head body member, extension portions protruding from two ends of the junction portion and positioning openings in the extension portions, which positioning openings are precisely located relative to the discharge ports. The apparatus includes positioning pins flanking a head-mounting opening in the apparatus that accepts the head body member, and the positioning pins cooperate with the positioning openings to accurately position the discharge ports in the apparatus when the head body member is inserted in the head-mounting opening.

Abstract: An ink jet recording apparatus of the present invention has an ink jet recording head having an orifice from which an ink drop is ejected and an energy generation means for ejecting an ink fluid in the orifice. A first electrode is formed in the orifice and is connected electrically to the ink fluid. A second electrode is formed in an opposite position to the orifice with a designated distance from the orifice. A voltage controller applies a first voltage during a time period from a time when an ink fluid is ejected from the orifice to a time when the ink fluid is separated in 2 or more ink drops during traveling, and immediately after applying the first voltage, applies a second voltage which has an identical polarity to a polarity of the first voltage and has an absolute value less than an absolute value of the first voltage.

Abstract: A process for producing an ink jet recording device involves providing a support member having an electro-thermal converting member and a wiring electrically connected to the electro-thermal converting member thereon, forming a first insulating layer on the support member, and forming on the support member a second insulating layer for increasing a protruded height of a bump-shaped electrode, the second insulating layer having a desired thickness. Other steps in the method involve removing part of the first and second insulating layers to expose a portion of the wiring, forming a bump-shaped electrode to a height corresponding to the thickness of the second insulating layer on the exposed portion of the wiring by electroplating, and removing the second insulating layer, resulting in the bump-shaped electrode having a desired height.

Abstract: An instantaneous value of alternating current signal from an instrument potential transformer 10 or an instrument current transformer 9 is processed with an analog filter 21, 22, the frequency to be used for correction being detected with a frequency detector 103, frequency correction of the gain of the detected signal being performed with a frequency corrector 104, 114 after detecting the root-mean-square value of the frequency, the corrected signal being supplied to a digital automatic voltage regulator 120. Thereby, it is possible to remove a direct current component and absorb a surge in a signal, and to correct the signal in coping with the fluctuation of the input signal to detect a stable signal.