Abstract: An inkjet cartridge having a plurality of ink reservoirs and a plurality of nozzle rows without variations in lengths of ink flow paths communicating the ink reservoirs with the nozzle rows. An inkjet cartridge includes a tank part having a plurality of ink reservoirs and a head part having nozzle rows, each nozzle row having a plurality of nozzles from which ink supplied from the tank part is ejected. Each of ink supply ports provided in each of the ink reservoirs is communicated with a predetermined nozzle row via an ink flow path, and the plurality of ink reservoirs are formed by dividing an internal space of the tank part into equal parts on a plane perpendicular to an ink ejection direction while lengths of a plurality of ink flow paths are the same.

Abstract: A recording head configured to discharge ink from a nozzle includes a cantilever and a liquid chamber. The cantilever has a free end and a fixed end and bends to generate a pressure for discharging ink. The liquid chamber communicates with the nozzle. The cantilever is disposed in the liquid chamber. The cantilever has a stepped portion on or in a surface facing the nozzle and in the vicinity of the free end.

Abstract: An ink jet recording head can discharge a droplet of differently colored ink, so that the volume of the ink discharged is efficiently stabilized, without the apparatus size and the manufacturing costs being increased. Three ink supply ports are formed in a recording element board, and one nozzle array is arranged along one side of each ink supply port. The discharge portions for cyan ink and magenta ink, which have high visibility, are located on opposite sides of the recording element board, and the discharge portion for yellow ink, which has low visibility, is located in the center of the recording element board. Further, in the cyan ink and magenta ink discharge portions, sub heaters for temperature adjustment are arranged, relative to the ink supply ports, along the same sides as the nozzle arrays.

Abstract: In an ink jet recording head which can discharge ink droplets having different discharge amounts, stabilization of the ink discharge amount is efficiently achieved without upsizing and cost increase. In the ink jet recording head of the invention, three ink supply ports are provided in a recording element substrate. For a cyan ink discharge unit and a magenta ink discharge unit which are located on both side portions of a recording element substrate, a nozzle array having a large ink discharge amount and a nozzle array having a small ink discharge amount are provided across the ink supply port, and a temperature control sub-heater is arranged near the nozzle array having the small ink discharge amount.

Abstract: Two arrays of ejection openings which eject relatively large amounts of ink are provided for each of different color inks and are disposed at symmetrical positions in the order of colors in a direction corresponding to a record scan. In addition, a single array of ejection openings which eject relatively small amounts of ink is disposed for at least one color ink. Since the symmetrical disposition in the color order of the ejection opening arrays which eject large amounts of ink prevents color unevenness from appearing even when the bidirectional recording is performed. Since the single array is formed of the ejection openings which eject small amount of ink, and which is used for highly precise recording, it is possible to avoid image deterioration due to the shift of dot formed positions, even when the recording head is mounted in an inclined manner attributable to the variation in manufacturing.

Abstract: An ink tank includes two stirring members having different masses in an ink containing chamber. The two stirring members are moved by an inertial force according to movement of a carriage and stir ink. The two stirring members have different movement start times and movement speeds.

Abstract: An object of the present invention is to provide internal electrode paste capable of preventing dripping and blurring, etc. of paste even when a solvent ratio is increased and an electrode material powder ratio is decreased in the paste and, moreover, capable of forming a uniform internal electrode layer without any printing unevenness so as to obtain a thin internal electrode layer: comprising an electrode material powder, a solvent and a binder resin; wherein a molecular structure of the binder resin comprises both of a first structure unit (an acetal group derived from acetaldehyde) and a second structure unit (a butyral group derived from butylaldehyde).

Abstract: The objective of the invention is to provide an ink jet recording head that discharges a droplet of differently colored ink, so that the volume of the ink discharged is efficiently stabilized, without the apparatus size and the manufacturing costs being increased. According to an ink jet recording head of the present invention, three ink supply ports are formed in a recording element board, and one nozzle array is arranged along one side of each ink supply port. The discharge portions for cyan ink and magenta ink, which have high visibility, are located on opposite sides of the recording element board, and the discharge portion for yellow ink, which has low visibility, is located in the center of the recording element board. Further, in the cyan ink and magenta ink discharge portions, sub heaters for temperature adjustment are arranged, relative to the ink supply ports, along the same sides as the nozzle arrays.

Abstract: In an ink jet recording head which can discharge ink droplets having different discharge amounts, stabilization of the ink discharge amount is efficiently achieved without upsizing and cost increase. In the ink jet recording head of the invention, three ink supply ports are provided in a recording element substrate. For a cyan ink discharge unit and a magenta ink discharge unit which are located on both side portions of a recording element substrate, a nozzle array having a large ink discharge amount and a nozzle array having a small ink discharge amount are provided across the ink supply port, and a temperature control sub-heater is arranged near the nozzle array having the small ink discharge amount.

Abstract: An inkjet cartridge having a plurality of ink reservoirs and a plurality of nozzle rows without variations in lengths of ink flow paths communicating the ink reservoirs with the nozzle rows. An inkjet cartridge includes a tank part having a plurality of ink reservoirs and a head part having nozzle rows, each nozzle row having a plurality of nozzles from which ink supplied from the tank part is ejected. Each of ink supply ports provided in each of the ink reservoirs is communicated with a predetermined nozzle row via an ink flow path, and the plurality of ink reservoirs are formed by dividing an internal space of the tank part into equal parts on a plane perpendicular to an ink ejection direction while lengths of a plurality of ink flow paths are the same.

Abstract: The present invention provides a storing structure for storing an ink jet head including a nozzle communicated with an opening for discharging liquid, a liquid storing portion for storing the liquid to be supplied to the nozzle and a liquid introduction portion for introducing the liquid into the liquid storing portion from exterior, wherein, in the ink jet head, air is housed in the liquid storing portion and the liquid is contained at least in the nozzle, and a cap unit including an elastic cap for covering an area of the opening and a liquid absorbing member disposed in the elastic cap is closely contacted with and attached, around the opening, to a face in which the opening is formed, and the liquid introduction portion is communicated with atmosphere at least when inner pressure of the liquid storing portion is increased, thereby maintaining a space within the cap unit to a wetting condition.

Abstract: The present invention provides a storing structure for storing an ink jet head comprising a nozzle communicated with an opening for discharging liquid, a liquid storing portion for storing the liquid to be supplied to the nozzle, and a liquid introduction portion for introducing the liquid into the liquid storing portion from exterior, wherein, in the ink jet head, air is housed in the liquid storing portion and the liquid is contained at least in the nozzle, and a cap unit including an elastic cap for covering an area of the opening and a liquid absorbing member disposed in the elastic cap is closely contacted with and attached, around the opening, to a face in which the opening is formed, and the liquid introduction portion is communicated with atmosphere at least when inner pressure of the liquid storing portion is increased, thereby maintaining a space within the cap unit to a wetting condition.

Abstract: The present invention provides a storing structure for storing an ink jet head comprising a nozzle communicated with an opening for discharging liquid, a liquid storing portion for storing the liquid to be supplied to the nozzle, and a liquid introduction portion for introducing the liquid into the liquid storing portion from exterior, wherein, in the ink jet head, air is housed in the liquid storing portion and the liquid is contained at least in the nozzle, and a cap unit including an elastic cap for covering an area of the opening and a liquid absorbing member disposed in the elastic cap is closely contacted with and attached, around the opening, to a face in which the opening is formed, and the liquid introduction portion is communicated with atmosphere at least when inner pressure of the liquid storing portion is increased, thereby maintaining a space within the cap unit to a wetting condition.

Abstract: A cartridge is detachably mountable to a holder of an ink jet recording apparatus, so as to be freely reciprocatable to scan across a recording medium and record thereon by discharging ink. The cartridge is defined by a cartridge main body, and is provided with a recording head for discharging ink from plural nozzles formed in parallel on a lower face of the cartridge main body facing the recording medium. A front face of the cartridge main body is provided with an electrical connection portion having cartridge electrodes, which are electrically connectable with corresponding electrodes of the holder. A rear face opposite to the front face is provided with an ink connection portion connectable to corresponding supply ports which supply ink to the recording head from a main tank installed elsewhere on the ink jet recording apparatus. With the cartridge thus structured, the force exerted for connection to the supply port does not affect the precision with which the cartridge is mounted on the holder.

Abstract: By laminating soft magnetic sheets 1, 11, a laminated soft magnetic member 5 in which insulating layers and soft magnetic metal layers are alternately laminated is produced. In this case, prior to laminating the obtained soft magnetic sheets 1, 11, or posterior to obtaining the laminated soft magnetic member 5 by laminating the soft magnetic sheets 1, 11, heat treatment is conducted under the conditions predetermined depending on the purpose of the heat treatment. During the heat treatment, pressing treatment can also be conducted concurrently. Additionally, when the heat treatment is conducted under the condition in which a tension is applied, further improvement of the magnetic properties can be expected.

Abstract: A laminated soft magnetic member 5, which comprises a laminated body in which 1 &mgr;m or less thick soft magnetic metal layer 7 and an insulating layer 6 are laminated alternately and is 0.2 mm or less in overall thickness, is excellent in permeability in the high frequency band exceeding 800 MHz, and accordingly, by being attached to a cellular phone, can improve the radiation efficiency of the electromagnetic wave on the side opposite to the head of a human body and is preferable as a member for the countermeasure against SAR.

Abstract: The invention prevents drawbacks resulting from the bubble generated at the downstream side of the filter, while minimizing the waste in the ink. The recording head has a sub tank for storing ink supplied from the exterior, and a liquid chamber storing the ink supplied from the sub tank and supplying ink directly to a nozzle for ink discharge. A filter is provided between the sub tank and the liquid chamber. The liquid chamber holds ink of a predetermined amount in such a manner that the ink therein is separated by gas between the filter and the liquid chamber.

Abstract: An ink jet recording head comprises an ink tank, a nozzle for discharging ink, a liquid chamber for retaining a specific amount of ink supplied from the ink tank through a filter, while supplying ink to the nozzle, and a covering member to be bonded to the liquid chamber, and on the circumference of the liquid chamber, a groove is formed to enable bonding agent to be coated therefor, and on the circumference of the covering member, an extrusion is formed to be fitted into the groove. For this ink jet recording head, gas releasing means is provided for releasing gas remaining in the bonding agent to the outside of the groove when the covering member is bonded to the liquid chamber by fitting the extrusion into the groove after the bonding agent is coated in the groove.

Abstract: There is provided a soft magnetic member comprising a resin film 2, a metal sublayer 3 formed on the resin film 2 and a soft magnetic metal layer 4a formed on the metal sublayer 3. In the soft magnetic metal layer 4a, on the side of the metal sublayer 3, there is formed a region having a higher Fe concentration and a higher saturation flux density than other regions.

Abstract: The present invention discloses an elastic transformable body for adjusting vapor pressure, a vapor pressure adjustment chamber using the same, an ink-jet recording head having a vapor pressure adjustment device and an ink-jet recording device having the recording head, and more particularly to a vapor pressure adjustment device for adjusting negative pressure generated in a liquid chamber in an ink-jet recording head when discharging ink. The pressure adjustment chamber has at least one elastic transformation body having a changeable volume according to vapor pressure to adjust the vapor pressure in a container communicated thereto and a support for supporting the elastic transformation body to the container.