Abstract: An ink container connectable with an ink inlet portion of an ink jet head having a plurality of ink ejection outlets, comprising an improvement in which a surface of the ink container to be connected with the ink jet head is inclined from a plane perpendicular to a direction in which the ink container is connected with the ink supply portion.

Abstract: Disclosed herein is a recording ink suitable for use in image recording together with a liquid composition containing a cationic substance, wherein the recording ink comprises a coloring material and a water-soluble polymeric compound which exhibits nonionic properties in the ink and has an alicyclic, nitrogen-containing heterocycle.

Abstract: A liquid storing container, having a liquid feed portion for supplying liquid to a liquid injection recording apparatus, includes a rectangular receiving case for a porous member, and a filter that compresses the porous member. The liquid storing container provides for controlled feeding of liquid through a contact portion where the filter compresses the porous member, and a proper balance of air and liquid is achieved by symmetrical surfaces located within the receiving case.

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 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: An ink container comprising a flexible bag is of a polygonal cross-section when it is filled with a sufficient quantity of ink.

Abstract: An ink container includes a cylindrical member having a closed end and an opposite open end; and a flexible member covering the open end of the cylindrical member to define an ink containing portion. The flexible member has a bottom portion and a bent portion that is movable along an internal surface of the cylindrical member with consumption of the ink therein, wherein the bottom portion is less easily deformable than the bent portion and movement of the bent portion is irreversible.

Abstract: A liquid storing container employable for an ink jet recording apparatus includes a housing, a porous ink absorbing member received in the housing, and a first filter coming in contact with the ink absorbing member. The liquid storing container is detachably connected to an ink jet recording head having a second filter disposed in a liquid flow path thereof. The liquid storing container is constructed such that the volume between the first filter and the second filter, a size of each filter, a condition for compressively receiving the ink absorbing member in the housing, and an inner structure of the liquid storing container satisfactorily coincide with predetermined conditions.

Abstract: A liquid storing container employable for an ink jet recording apparatus includes a housing, a porous ink absorbing member received in the housing, and a first filter coming in contact with the ink absorbing member. The liquid storing container is detachably connected to an ink jet recording head having a second filter disposed in a liquid flow path thereof. The liquid storing container is constructed such that the volume between the first filter and the second filter, a size of each filter, a condition for compressively receiving the ink absorbing member in the housing, and an inner structure of the liquid storing container satisfactorily coincide with predetermined conditions.

Abstract: An ink jet recording apparatus which records by discharging ink onto a recording medium comprises recording head for recording on the recording medium by discharging ink through discharge ports; an ink tank for storing the ink; a first ink flow channel for passing the ink from the ink tank to the recording head; a second ink flow channel for passing the ink from the recording head into the ink tank; a third ink flow channel communicating the ink tank with the first ink channel; a filter provided in the first ink flow channel; and a back flow prevention valve provided in the first, the second and the third ink flow channels.

Abstract: In an ink jet recording apparatus in which a filter is placed in an ink supply route, when an ink flow is formed in the ink supply route by ink ejection during recording operations and so on, a valve does not contact firmly to the filter, but when an ejection recovery operation is performed and an ink flow velocity increases, the valve contacts firmly to the filter and covers up a part of the filter. With this structure and operation, the effective cross-section area of the filter decreases and hence, a given quantity of pressure difference is produced between the upstream side and the downstream side of the filter. As a result, bubbles unable to pass through the filter at recording operations can pass through the filter when ejection recovery operations are performed.

Abstract: A liquid container includes a plurality of chambers, a liquid supply port provided in one of the chambers, an air vent provided in another one of the chambers and a continuous liquid supply material. Adjacent chambers are in fluid communication with each other only through the liquid supply material.

Abstract: An apparatus discharges ink droplets by use of pressure wave motion which occurs in a ink pressure chamber through shrinkage and expansion of an electromechanical transducing element provided in the ink pressure chamber having nozzles at the tip end. The shrinkage of the transducing element abruptly is caused to occur and also the shrinkage is maintained for a certain period of time, and subsequently expansion is abruptly caused to occur to release shrinkage to a certain level, and further a driving voltage to release gradually the shrinkage is applied on the electromechanical transducing element. A method of driving an ink jet head included in such an apparatus comprises generating a drive pulse that shrinks the transducing element, abruptly expands it to a certain level after a certain period of time and then gradually releases the remaining amount of shrinkage.