Abstract: A liquid container comprises an inner wall that forms the liquid containing portion to contain liquid therein; an outer wall that forms the container to contain the liquid containing portion therein; and a liquid supply portion for supplying liquid from the liquid containing portion to the outside. Then, the inner wall is arranged to be a member to generate negative pressure in the liquid containing portion by being deformed following the leading-out of the liquid, and also, formed by the material having an elastic modulus change of 25% or less against the temperature change of use environment. With the liquid container thus structured, it is possible to implement the stable supply of liquid by stabilizing the characteristic of negative pressure in the liquid containing portion thereof irrespective of the temperature changes of use environments.

Abstract: A liquid storing container attachable and detachable to and from a recording device includes a negative pressure producing member storage chamber made to accommodate a negative pressure producing member and equipped with a liquid supplying section and an atmosphere communication section, a liquid storage chamber having a communicating hole for establishing communication with the negative pressure producing member storage chamber and made to define a substantially hermetic space for storing a liquid to be supplied to the negative pressure producing member, a partition wall for establishing a partition between the negative pressure producing member storage chamber and the liquid storage chamber and for defining the communicating hole, and a path made in the vicinity of the communicating hole on the negative pressure producing member storage chamber side for introducing the atmosphere from the negative pressure producing member storage chamber into the liquid storage chamber, wherein the negative pressure produc

Abstract: A forming method for a fiber aggregate in which fibers are heated to be welded with each other, the method includes a heating step of applying upward heated air to a bottom of a block of the fibers to pass the heated air therethrough and to cause the block of fibers to float, wherein at least parts of fibers are melted while the block of the fibers float; a compression step of compressing substantially in a vertical direction the heated block of fibers into a desired height; and a cooling step of cooling the compressed block of fibers to solidify melted portions of the fibers at portions where the fibers intersect with each other.

Abstract: An ink absorber is housed inside a housing of an ink tank and is capable of retaining ink. The ink absorber has an outer surface equal to or corresponding to a shape of an internal surface of the housing and is made of a fiber material obtained by compressing a fiber body and thermally molding at least a surface thereof. An ink tank is comprised of the ink absorber and the housing. An ink jet cartridge is comprised of the ink tank and a print head. The ink absorber has an outer surface equal to or corresponding to a shape of an internal surface of the housing before being inserted into the housing. The ink absorber comprises a fiber material, and is formed by compressing a fiber body and thermally molding at least a surface thereof.

Abstract: A liquid container for a liquid jet recording apparatus comprises a first chamber containing negative pressure producing material and having a liquid outlet connectable to a liquid jet head to supply liquid from the container to the liquid jet head and an air vent for allowing ambient air into the container, wherein the liquid outlet is provided in a bottom portion of the first chamber. A second chamber communicates with the first chamber by a communication path and is substantially hermetically sealed. A wall extends upwardly from the communication path of the first chamber. An ambient air introducing path is provided for between the wall and the negative pressure producing material extending from a point partly up the wall toward the communication path for introducing ambient air into the second chamber.

Abstract: An ink tank provided with an ink containing portion containing ink therein, and a housing protecting the ink containing portion is characterized by a resin material capable of transmitting therethrough visible light and infrared light travelling from the exterior of the housing toward the interior of the ink containing portion and capable of decreasing ultraviolet light travelling from the exterior of the housing toward the interior of the ink containing portion.

Abstract: To provide a recording liquid feed path, recording liquid container, and recording liquid feed device having the same, as well surface modifying method for the recording liquid feed device to feed efficiently a recording liquid for ejection through a feed tube. If the interior of the feed tube is not rendered hydrophilic as shown in FIG. 3A, air which has passed through a wall of the feed tube forms a bubble, which bubble adheres to an inner surface of the feed tube and obstructs a flow of the recording liquid. But if the inner surface of the feed tube is rendered hydrophilic to form a hydrophilic surface as shown in FIG. 3B, the recording liquid is conducted along the hydrophilic surface at the inner surface portion of the feed tube with the bubble adhered thereto, so that the adhesion area of the bubble to the feed tube inner surface is reduced and the bubble floats from the inner surface.

Abstract: A liquid container including a first chamber for containing a reservoir of liquid, a second chamber containing a negative pressure producing material, an air vent for fluid communication with ambient air, a liquid supply port for supplying liquid out of the second chamber, a communication path for fluid communication between the first and second chambers where the first chamber is generally sealed by the ambient air except through the communication path, and a wall extending from the communication port. The communication path has a first region for permitting movement of air from the second chamber to the first chamber and a second region for permitting movement of the liquid from the first chamber to the second chamber.

Abstract: A method for coupling a liquid jet head unit is to couple a liquid jet head unit for recording by discharging liquid to a recording medium with a head installation member capable of installing the head unit through an elastic member.

Abstract: An ink jet unit includes an ink jet head for ejecting ink; an ink cartridge for containing ink to be supplied to the ink jet head; an ink supply member for introducing the ink from the ink cartridge, provided in the ink jet head; a negative pressure generating material in the ink cartridge; an opening for permitting contact between the negative pressure generating material and in the ink supply member; wherein a gap is formed in the opening when the ink supply member is in contact with the negative pressure generating material.

Abstract: An ink container includes an ink absorbing material for retaining ink and producing a negative pressure; a casing, provided with an ink supplying portion and an air vent, for accommodating the ink absorbing material; wherein the ink absorbing material is of thermoplastic material and has a surface ink blocking layer provided by heating and melting a surface of the absorbing material; wherein the ink blocking layer blocks movement of the ink contained in the ink absorbing material to outside, and constitutes at least a part of the casing.

Abstract: A fiber body which exhibits sufficient ink supplying characteristics for keeping up with the trend toward diversification of ink and high printing speed while ensuring an easy and simple ink injection operation and a liquid container having the same. The ink tank has a PP fiber body (crosshatched area of the figures), as a negative pressure generating member for an ink jet head which ejects liquid to perform recording, arranged almost all over the interior thereof, so as to allow the fiber body to hold a liquid to be supplied to an ink jet head. On the top of the tank casing, provided is an atmosphere communication port. And as a PP fiber body, used is an assembly of intertwined PP fibers of which surface has been subjected to surface treatment of giving hydrophilic nature thereto.

Abstract: An ink absorbing body stores an ink injected into an ink tank for an ink-jet with capillary force between fiber. On a surface of said fiber before filling the ink, a surfactant is deposited within a range of 0.002 to 0.2 wt % relative to a weight of the ink or in a range of 0.01 to 0.5 wt % relative to a weight of the fiber.

Abstract: A liquid container for a liquid jet recording apparatus includes a first chamber containing negative pressure producing material and having a liquid outlet. At a lower part of the cartridge and contactable to the liquid jet head, the liquid container supplies liquid from the cartridge to the liquid jet head. An air vent allows ambient air into the cartridge. A second chamber communicates with the first chamber by means of a communication part, except for which the second chamber is substantially hermetically sealed. The second chamber is disposed at the lower part of the cartridge and provides a liquid reservoir for the first chamber.

Abstract: The present invention provides an ink jet recording head comprising a top plate in which two groups of ink passage grooves for forming ink passages, two ink chamber frames, ink introduction passages, two rows of ink discharge ports are formed, two substrates on which a plurality of resistive heat generating elements for discharging ink are formed in correspondence to the two rows of ink discharge ports, and two elastic members for contacting under pressure and securing the substrates and the top plate for each said substrate, and wherein the junction between the substrates and the top plate forms the ink passages and the ink chambers therebetween, and further wherein a groove for isolating the ink discharge port rows from each other is formed between the ink discharge port rows and a depth of the groove is greater than depths of the ink discharge ports and the ink passages.

Abstract: An ink jet head for ejecting ink, has an ink ejecting portion having an ink ejecting port formed thereon so as to eject ink through the ink ejecting port, a positioning portion for definitely determining the position of the ink jet head relative to an apparatus using the ink jet head when the ink jet head is fitted to the apparatus, an ink supplying portion adapted to be connected an ink supplying unit while ink is supplied to the ink jet head, and an electric connecting portion adapted to be electrically connected to an electric connecting portion on the apparatus side so as to send and receive signals. The positioning portion, the ink supplying portion and the electric connecting portion are disposed on a different surface from a surface on which the ink ejecting portion is disposed and at least one of the electric portion and the ink supplying portion is disposed on an opposite side surface to a surface on which the positioning portion is disposed.

Abstract: A recording apparatus using a recording head to effect recording on a recording material includes a recording head unit provided with a recording head for effecting recording on a recording material including a recording head supporting member for supporting the recording head at a predetermined position; a relaying electric contact member including a first electric contact member for external electric connection; a second electric contact for electrically connecting the first electric contact member with the recording head; and an electric current supplying device for supplying electric current to the first electric contact member.

Abstract: An ink jet head having a buffer chamber which absorbs any back-pressure wave generated as a result of generation of back wave, thereby preventing reduction of refilling with ink. Exothermic elements provided in buffer chambers formed in a common ink chamber generate bubbles so that bubbles are always maintained in the buffer chambers so as to ensure stable recording.

Abstract: A container for containing printing liquid for supplying to an ink jet head for an ink jet recording apparatus. The container includes a first chamber containing negative pressure producing material and having an air vent communicating with ambient air and a supply port for supplying printing liquid to the ink jet head. The container also includes a second chamber communicating with the first chamber via a communication port and providing a printing liquid reservoir for the first chamber. The capillary force provided by the negative pressure producing material adjacent a wall extending from the communication port and decreasing in a direction perpendicular to and towards the wall at least adjacent a part of the communication port which is uppermost in use of the container.

Abstract: A container for containing printing liquid for supplying to an ink jet head for an ink jet recording apparatus. The container includes first and second chambers, with the first chamber containing negative pressure producing material and having an air vent communicating with ambient air and a supply port for supplying printing liquid to the ink jet head. The second chamber communicates with the first chamber via a communication port and provides a printing liquid reservoir for the first chamber. In an area adjacent a wall extending from the communication port, a capillary force provided by the negative pressure producing material decreases in a direction perpendicular to and towards that wall at least adjacent a part of the communication port which is uppermost when the container is in use.