Abstract: An apparatus for liquid-jet recording having heat-generating means and means for jetting a liquid utilizing an energy generated by the heat-generating means comprises an electrode provided in contact with the liquid in impart a potential to the liquid lower than the potential used to generate heat.

Abstract: A liquid jet recording head, comprising a liquid discharging section having an orifice for discharging liquid to form liquid droplets and a liquid pathway, being connected to said orifice and having a heat acting portion at which heat energy for forming liquid droplets acts on liquid as a part of its constitution, a common liquid chamber for storage of said liquid to be supplied to said pathway and an electro-thermal transducer, having at least a pair of confronting electrodes connected electrically to a heat generating resistance layer provided on a substrate thereby forming a heat generating section between these electrodes, characterized in that an upper layer comprises a first layer constituted of an inorganic dielectric material, a second layer constituted of an organic material and a third layer constituted of an inorganic material, these layers being laminated in this order from the side of said electrodes on at least the portion of said electrodes lying beneath said common liquid chamber or on the por

Abstract: An electro-thermal transducer is composed of a substrate, a resistive heater element formed on the substrate, and electrically conductive members to supply electric power to the resistive heater element, wherein the resistive heater element contains a metal boride as the principal constituent. The transducer of this construction is capable of selecting its resistivity to a high value and causing a large electric current to flow in the form of short pulses for the purpose of high speed printing, hence it is stable against repetitive pulse applications over a long period of time. The method of producing the transducer is by forming a layer of a resistive heater element including a metal boride on a substrate of an electrically insulative material by conducting a reactive sputtering reaction between a target of an elemental form of the metal and diborane gas; and then applying to the resistive heater element an electrically conductive member for supplying the resistive heater element with electric power.

Abstract: A liquid jet recording device comprises: a recording head having liquid discharging orifice for discharging liquid in a predetermined direction, a heat generating member, a heat acting zone where heat energy generated from the heat generating member acts on the liquid, and liquid feeding path for feeding the liquid to the heat acting zone; and drive signal feeding means for generating drive signals to drive said heat generating member to discharge the liquid in the predetermined direction, wherein the direction of the liquid flowing into said heat acting zone from said liquid feeding path differs from the direction of the liquid flowing out of said heat acting zone toward said liquid discharging orifice.

Abstract: An ink jet recording apparatus comprises actuating portions and lead electrodes for conducting current. The lead electrodes are wired in such a manner that a conductive member is disposed on a surface which is at a side where the ink droplets are ejected and said conductive member is a part of said lead electrode, or one actuating portion is provided with a plurality of lead electrodes, and these lead electrodes are led, substantially in parallel, to terminals which are located at a side opposite to the ejection port with respect to the actuating portion, or one chamber is provided with a plurality of actuating portions which are separated from one another, and lead electrodes connected to the actuating portions are led, substantially in parallel, to terminals which are located at a side opposite to the ejection port with respect to the actuating portion, or the actuating portion is disposed on a conductive member intervened with an insulating layer and the conductive member is a part of the lead electrode.

Abstract: A liquid-jet recording head provided with a liquid ejecting section comprising an orifice for ejecting a liquid to form its flying droplets and a liquid flow path communicating with the orifice and having as a portion of the constitution a heat action zone where thermal energy for forming said droplets acts on the liquid and with an electro-thermal transducer comprising at least one pair of opposing electrodes electrically connecting to a heat-generating resistance layer formed on a base plate and a heat generating part formed between the electrodes, characterized by having a protective layer composed of a first layer of an organic material and a second layer of an inorganic material which are laminated on the portion of the electrode under the liquid flow path in that order from the electrode side.

Abstract: A method for producing a recording head for ejecting a recording liquid in an action chamber from an orifice connected with said action chamber in a state of small droplets and depositing at least a part of said droplets onto a recording surface to achieve recording, said method comprising a step X of forming a member a provided with a perforation for constituting said action chamber, a step Y of adjoining an end aperture of said perforation to another member b constituting an intermediate supply chamber of said liquid, and a step Z of attaching to said member c another member c for forming a slit in the vicinity of the other end aperture of said perforation.

Abstract: A device for recording comprising ejecting a liquid recording medium by heat energy which comprises a recording head composed of a discharging orifice for ejecting the liquid recording medium in a form of droplets, an inlet for introducing the liquid recording medium, a liquid chamber for holding the liquid recording medium, and a heating element for applying heat energy to the liquid recording medium in the liquid chamber, and a means for applying voltage pulse to control heating by the heating element, the distance between the surface of the heating element and the liquid recording medium being not more than 100 microns.

Abstract: A liquid ejecting recording process using a liquid ejecting recording head comprises a liquid discharging portion including an orifice for ejecting liquid droplets and a heat acting portion communicated with said orifice, said heat acting portion being a portion where heat energy for discharging liquid droplets acts to a liquid, and an electrothermal transducer having a structure laminated on a substrate with the layers mentioned below in the following order a lower layer, a resistive heater layer, and an upper layer from the substrate to the heat acting portion on the position of the heat acting portion, characterized in that when a signal voltage is applied to said resistive heater layer and potentials generating at two electrodes A and B connected with said resistive heater layer are represented by V.sub.A and V.sub.B, respectively, potential V applied to at least the surface portion of said upper layer is kept intermediate between V.sub.A and V.sub.

Abstract: An ink jet recording method which comprises contacting or bringing closer an electro-thermal transducer with or to a recording liquid in an operating chamber having a discharge orifice, introducing into the electrothermal transducer an input pulse signal with its pulse width being in a range of from 0.1 .mu.sec. to 500 .mu.sec., said input pulse signal being introduced in such a manner that its input cycle becomes at least three times as large as said pulse width, discharging and sputtering said recording liquid from said discharge orifice in the form of fine droplet in accordance with operating force developed within said operating chamber, and effecting image recording on the surface of a recording medium with the liquid droplets.

Abstract: A liquid jet recording method capable of recording gradation comprises (a) filling with a liquid a conduit having, at the end, an orifice for ejecting and projecting a liquid droplet to a predetermined direction, said conduit being provided with a heat actuating portion generating a force for ejecting the liquid droplet by applying heat energy to the liquid to cause an abrupt state change, the heat actuating portion including an electrothermal transducer having a heat generating portion which has such a structure that the degree of heat supply is different from position to position on the heating surface, and (b) controlling the strength of an input electric signal corresponding to the gradation of an image to be recorded, thereby controlling the distribution of degree of heat supplying at the heating surface.

Abstract: A liquid droplet ejecting recording head comprises liquid ejecting portion including an orifice for ejecting liquid droplets and a heat actuating portion communicated with the orifice, and an electrothermal transducer as a means for generating heat energy, the heat energy acting on the liquid at the heat actuating portion for ejecting liquid droplets, characterized in that the part contacting the liquid of the heat actuating portion is made of a material whose .DELTA.W is not more than one-tenth of 1 mg/cm.sup.2 where .DELTA.W is a decrement weight of the material per unit area in mg/cm.sup.2 at a time "t", when subjected to a weight decreasing test, the "t" being a time at which .DELTA.W(Al) is 1 mg/cm.sup.2 where .DELTA.W(Al) is a decrement weight of an aluminum plate of 99.9% in purity per unit area of the tested surface when subjected to the weight decreasing test.

Abstract: A liquid droplet forming apparatus is improved by selecting particular conditions concerning total opening area of communicating ports, an area of the region having the communicating ports; various lengths in the direction along the axis of the actuating chamber; and volumes of various portions in the actuating chambers and the common liquid chamber.

Abstract: A liquid jet recording device comprises: a recording head having liquid discharging orifice for discharging liquid in a predetermined direction, a heat generating member, a heat acting zone where heat energy generated from the heat generating member acts on the liquid, and liquid feeding path for feeding the liquid to the heat acting zone; and drive signal feeding means for generating drive signals to drive said heat generating member to discharge the liquid in the predetermined direction, wherein the direction of the liquid flowing into said heat acting zone from said liquid feeding path differs from the direction of the liquid flowing out of said heat acting zone toward said liquid discharging orifice.

Abstract: An ink jet recording apparatus for ejecting a recording liquid in the form of droplets from an orifice connecting to a chamber containing said liquid and depositing at least of said droplets onto a recording material to perform recording, comprising a liquid intake means in the vicinity of said orifice.

Abstract: A liquid jet recording process and liquid jet recording head are driven by heat energy generated by an electrothermal transducer. The operating conditions as to heating and others are disclosed and further desirable dimensions of the electrothermal transducer are determined by referring to various characteristics of the structure materials and others.

Abstract: A thermal head of the present invention is composed of a substrate, a resistive heater element formed on the substrate, and electrically conductive members to supply electric power to the resistive heater element, wherein the resistive heater element contains a metal boride as the principal constituent. The thermal head of this construction is capable of selecting its resistivity to a high value and causing a large electric current to flow in the form of short pulses for the purpose of high speed printing, hence it is stable against repetitive pulse applications over a long period of time.

Abstract: A device for recording comprising ejecting a liquid recording medium by heat energy which comprises a recording head composed of a discharging orifice for ejecting the liquid recording medium in a form of droplets, an inlet for introducing the liquid recording medium, a liquid chamber for holding the liquid recording medium, and a heating element for applying heat energy to the liquid recording medium in the liquid chamber, and a means for applying voltage pulse to control heating by the heating element, the distance between the surface of the heating element and the liquid recording medium being not more that 100 microns.

Abstract: The present invention discloses a technique of effecting recording on a recording medium by a plurality of recording elements, wherein recording density by the plurality of recording elements is varied. Further, the recording density by the plurality of recording elements is varied in accordance with a time required for electrical transmission of informations to be recorded for definite numbers of scanning lines. For example, when the time required for such electrical transmission is short, the recording is effected by small numbers of the recording elements, while, when the time required for the electrical transmission is long, the recording operation is effected by large numbers of the recording elements, thereby preventing the image quality from lowering.

Abstract: A liquid jet recording method, which includes controlling thermal energy quantity to be generated by driving predetermined numbers of heat generating bodies selected in accordance with recording information from a plurality of heat generating bodies which disposed along a flow path in a liquid chamber communicatively connected with a discharge orifice for discharging and spattering liquid droplets in a predetermined direction, and each being driven independently of the other; causing the thus controlled thermal energy to act on the liquid in the liquid chamber to bring about instantaneous change in the state of the liquid to develop foams; and discharging and spattering the liquid droplets from the discharge orifice for recording.