72results about How to "Stable ejection" patented technology

To suppress curling phenomenon of a recording medium to which a liquid composition is applied while securing ejection stability. A liquid composition for used in an image recording method including the steps of applying an ink containing a colorant in a dissolved state or a dispersed state to a recording medium and applying to the recording medium a liquid composition which destabilizes the dissolved state or the dispersed state of the colorant in the ink by coming into contact with the ink, the liquid composition including at least a polyvalent metal ion, water, and water-soluble organic compounds 1 and 2, in which a content X (mass %) of the water-soluble organic compound 1 in the liquid composition is 15 mass % or more, and the content X (mass %) of the water-soluble organic compound 1 in the liquid composition and a content Y (mass %) of the water-soluble organic compound 2 in the liquid composition satisfy a specific relationship.

To suppress curling phenomenon of a recording medium to which a liquid composition is applied while securing ejection stability. A liquid composition for used in an image recording method including the steps of applying an ink containing a colorant in a dissolved state or a dispersed state to a recording medium and applying to the recording medium a liquid composition which destabilizes the dissolved state or the dispersed state of the colorant in the ink by coming into contact with the ink, the liquid composition including at least a polyvalent metal ion, water, and water-soluble organic compounds 1 and 2, in which a content X (mass %) of the water-soluble organic compound 1 in the liquid composition is 15 mass % or more, and the content X (mass %) of the water-soluble organic compound 1 in the liquid composition and a content Y (mass %) of the water-soluble organic compound 2 in the liquid composition satisfy a specific relationship.

A liquid container for supplying a liquid to a liquid ejection apparatus comprises: a liquid chamber provided to store the liquid; an air chamber connected with the liquid chamber to introduce the outside air into the liquid chamber with consumption of the liquid in the liquid chamber; an open-air hole provided to introduce the outside air into the air chamber; and a liquid inlet provided to fill the liquid into the liquid chamber, wherein the liquid inlet is located at a lower position than the open-air hole, in a filling attitude of the liquid container in which the liquid is filled into the liquid chamber.

The liquid supply apparatus has: a main tank which stores liquid; a sub tank which is disposed vertically above a recording head configured to eject the liquid and which is not connected to atmosphere, the sub tank being composed of a deformable member so that a volume of the sub tank is changed depending on a volume of the liquid in the sub tank; a first flow channel which connects the main tank with the sub tank; a second flow channel which connects the sub tank with the recording head; a flow rate determination device which determines a flow rate of the liquid in the second flow channel; a first pressure control device which controls an internal pressure of the main tank according to the flow rate determined by the flow rate determination device; and a second pressure control device which controls an internal pressure of the sub tank so as to fall within a prescribed range.

A liquid container for supplying a liquid to a liquid ejection apparatus comprises: a liquid chamber provided to store the liquid; an air chamber connected with the liquid chamber to introduce the outside air into the liquid chamber with consumption of the liquid in the liquid chamber; an open-air hole provided to introduce the outside air into the air chamber; and a liquid inlet provided to fill the liquid into the liquid chamber, wherein the liquid inlet is located at a lower position than the open-air hole, in a filling attitude of the liquid container in which the liquid is filled into the liquid chamber.

The present invention relates to a metal ink composition for inkjet printing, more particularly to a metal ink composition which includes 20 to 85 weight % of metal nanoparticles and 15 to 80 weight % of organic solvent, where the organic solvent is made of an ethylene glycol-based ether or a mixed solvent including an ethylene glycol-based ether. The invention provides a metal ink composition in which an organic solvent suited for an inkjet head is used to improve the ejection, storage, and viscosity properties of the ink.

The object of the present invention is to provide an inkjet recording ink ensuring excellent ejection stability even after aging of the ink and also exhibiting excellent weather resistance; provide an inkjet recording ink ensuring less blurring of the image drawn, in addition to excellent ejection stability and weather resistance; and provide a yellow ink and a dark yellow ink, which can contribute to realization of a pictorial quality with excellent color balance as a constituent ink of an ink set. These objects of the present invention can be achieved by an inkjet recording ink including an aqueous medium containing a yellow dye, particularly, a yellow dye represented by formula (1), having spectral absorption characteristics such that the maximum absorption wavelength is in the region from 390 to 470 nm and the absorption long-wave end has a tailing of a specified value or less, and antioxidative characteristics such that the ozone enforced discoloration rate constant is 5.0 x 10−2 [hour−1] or less. Furthermore, when the ink contains a diamino compound represented by formula (A), a carbonyl group (or sulfo group or the like)-containing cyclic compound represented by formula (B) and an organic solvent having a specific structure, the effect of the present invention is enhanced.

A droplet ejecting apparatus comprising a droplet ejecting unit having a droplet ejecting face, wherein the droplet ejecting face is provided with nozzles which eject droplets containing an organic compound, the droplet ejecting apparatus ejects the droplets by an inkjet method, the droplet ejecting apparatus comprises a water-shedding film provided on the droplet ejecting face near the nozzles and a hydrophilic film containing a photocatalyst provided in a region on the droplet ejecting face other than near the nozzles. Also provided is a droplet ejecting apparatus comprising a droplet ejecting unit, a cleaning member, and a wiping member, wherein the cleaning member removes the dirt containing an organic compound adhered to the droplet ejecting face, the wiping member wipes off the dirt containing the organic compound adhered to the cleaning member, and a wiping part of the wiping member comprises a photocatalyst.

When a dot is formed apart from other dots on a print medium, in response to a discontinuous print command, a first drive waveform is used. The first drive waveform includes an ejection pulse and an ink droplet reducing pulse for retrieving a portion of an ink droplet about to leave the nozzle. When a dot is formed to overlap other dots on a print medium, in response to one of continuous print commands, the second drive waveform is used. The second drive waveform includes an ejection pulse and an ejection stabilizing pulse for suppressing residual vibrations generated by the ejection pulse. By selectively using the first or the second drive waveform, an ink droplet smaller than 20 pl can be ejected stably even at high printing frequencies. As a result, high-quality, high-speed printing can be achieved.

When a dot is formed apart from other dots on a print medium, in response to a discontinuous print command, a first drive waveform is used. The first drive waveform includes an ejection pulse and an ink droplet reducing pulse for retrieving a portion of an ink droplet about to leave the nozzle. When a dot is formed to overlap other dots on a print medium, in response to one of continuous print commands, the second drive waveform is used. The second drive waveform includes an ejection pulse and an ejection stabilizing pulse for suppressing residual vibrations generated by the ejection pulse. By selectively using the first or the second drive waveform , an ink droplet smaller than 20 pl can be ejected stably even at high printing frequencies. As a result, high-quality, high-speed printing can be achieved.

The object of the present invention is to provide an inkjet recording ink ensuring excellent ejection stability even after aging of the ink and also exhibiting excellent weather resistance; provide an inkjet recording ink ensuring less blurring of the image drawn, in addition to excellent ejection stability and weather resistance; and provide a yellow ink and a dark yellow ink, which can contribute to realization of a pictorial quality with excellent color balance as a constituent ink of an ink set. These objects of the present invention can be achieved by an inkjet recording ink comprising an aqueous medium containing a yellow dye, particularly, a yellow dye represented by formula (1), having spectral absorption characteristics such that the maximum absorption wavelength is in the region from 390 to 470 nm and the absorption long-wave end has a tailing of a specified value or less, and antioxidative characteristics such that the ozone enforced discoloration rate constant is 5.0×10−2 [hour−1] or less. Furthermore, when the ink contains a diamino compound represented by formula (A), a carbonyl group (or sulfo group or the like)-containing cyclic compound represented by formula (B) and an organic solvent having a specific structure, the effect of the present invention is enhanced.

The invention provides a medicine ejection device which provides stable ejection even when a reservoir with high sealability is used and can eject an appropriate amount of medicine. A medicine ejection portion 1 includes an ejection nozzle 1a for ejecting a medicine and an element 1b which generates energy for ejecting the medicine from the ejection nozzle 1a, and is connected to a medicine storing portion 2 for storing the medicine. The medicine storing portion 2 is blocked from the outside air except a path through the ejection nozzle 1a, so that when the medicine is ejected from the ejection nozzle 1a, a pressure difference is formed between the outside and the inside of the medicine storing portion 2. A pressure unit 3 which is a feature of the present invention pressurizes a movable wall 5 when ejecting a medicine, which is displaced so that the volumetric capacity of the medicine storing portion 2 decreases due to the pressure difference.

An ink for sublimation transfer ink jet recording includes water, at least one sugar alcohol containing not less than four OH groups, a sublimation dye, a dispersant, and a compound expressed by the following chemical formula (I):R—O—(CH2CH2O)n—H  (I)where R is an alkyl group having a carbon number of 25 to 150 and n is from 2 to 100. The ink is printed on a sheet medium by ink jet printing, and then the sheet medium is heated to sublimate and transfer the sublimation dye onto an object to be dyed. The ink for ink jet recording and the sublimation transfer dyeing method using the ink not only can maintain performances such as storage stability and high-quality recording images, but also can reduce environmental pollution, effectively prevent nozzle clogging, exhibit good dispersion stability, and achieve a high redispersion property that ensures stable ejection both during long continuous operation and after stopping the operation for a long time.

An ink for sublimation transfer ink jet recording includes water, at least one sugar alcohol containing not less than four OH groups, a sublimation dye, a dispersant, and a compound expressed by the following chemical formula (I):R—O—(CH2CH2O)n—H  (I)where R is an alkyl group having a carbon number of 25 to 150 and n is from 2 to 100. The ink is printed on a sheet medium by ink jet printing, and then the sheet medium is heated to sublimate and transfer the sublimation dye onto an object to be dyed. The ink for ink jet recording and the sublimation transfer dyeing method using the ink not only can maintain performances such as storage stability and high-quality recording images, but also can reduce environmental pollution, effectively prevent nozzle clogging, exhibit good dispersion stability, and achieve a high redispersion property that ensures stable ejection both during long continuous operation and after stopping the operation for a long time.

[Object] To provide a device manufacturing apparatus in which a device can be precisely manufactured by stably ejecting a predetermined amount of droplets when the device is manufactured using a droplet ejecting device. [Solving Means] A pressure generation chamber 3 has a Helmholtz resonance frequency of a period TH. A driving signal includes a first signal element to cause the pressure generation chamber 3 to expand, a second signal element to cause the expanded pressure generation chamber 3 to contract, and a third signal element to cause the pressure generation chamber 3 to expand to its original state, which is held before the first signal element is output, after ejection of a droplet. The time which elapses between the beginning of output of the first signal element and the beginning of output of the second signal element, and the time which elapses between the beginning of output of the second signal element and the beginning of output of the third signal element are set to be substantially equivalent to the period TH. The sum of the amplitude of the first signal element and that of the third signal element is set to be substantially equivalent to the amplitude of the second signal element.

In a liquid ejection apparatus, having: a liquid ejection head having, a nozzle plate having a nozzle to eject liquid, a cavity to reserve liquid ejected form a ejection hole of the nozzle, a pressure generating device to form a meniscus of the liquid, and a ejecting voltage applying device to apply a ejection voltage to the liquid in the nozzle; a operation control device to control application a drive voltage to drive the pressure generating device and application of the ejection voltage by the ejection voltage applying device; and a counter electrode opposite to the liquid ejection head; wherein in the liquid ejection device in which the liquid is ejected by a static electric attraction force generated between the liquid in the nozzle to which a voltage is applied by the ejection voltage applying device and the counter electrode, and by a pressure generated in the nozzle, the pressure generating device to form the liquid meniscus forms the meniscus having a height of equal to or more than 1.3 times a radius of the nozzle on the ejection hole of the nozzle.

The invention provides an aqueous ink that can prevent clogging at an orifice due to drying of the ink though the ink contains a pigment, and can achieve high-level ejection stability required in recent years. The aqueous ink contains at least water, a water-soluble organic solvent and carbon black particles, the carbon black particles including carbon black particles having a particle size of 0.5 μm or more, wherein a proportion made up by the volume of carbon black particles having a particle size of 0.2 μm or more and less than 0.5 μm is 0.3% or less based on the total volume of all the carbon black particles in the ink, a number of carbon black particles having a particle size of 0.5 μm or more and less than 5.0 μm is 1.0×107 or less per mL of the aqueous ink, and an average particle size value of the carbon black particles is from 0.060 μm or more to 0.130 μm or less.

The invention provides an ink containing a polyurethane polymer which has units respectively derived from a polyisocyanate, a polyether polyol having no acid group and a diol having an acid group and has an acid value of 40 mg KOH / g or more and 140 mg KOH / g or less, a carbon black and at least one antioxidant selected from compounds represented by the general formulae (1) to (3).

A liquid droplet ejection head includes: a nozzle plate that has a plurality of nozzles ejecting a liquid droplet; a flow path member that includes: pressure generating chambers that communicate with the nozzles; and liquid supply paths through which liquid is supplied to the pressure generating chambers; and a damper portion that is disposed in at least one part of a region, the region being on the nozzle plate, corresponding to the liquid supply paths, the damper portion reducing a fluctuation of an ejection amount of the liquid droplets to enable stable ejection.

The inkjet recording head includes: a pressure chamber to which ink is supplied from an ink supply side; a nozzle plate including a nozzle which is connected to the pressure chamber and ejects the ink; and a circulation flow channel plate which is disposed on an opposite side of the nozzle plate from an ink ejection side, and includes: a circulation flow channel for expelling the ink from a vicinity of the nozzle; and a first nozzle flow channel for connecting the nozzle with the pressure chamber, wherein: at least a portion of the circulation flow channel plate is made of a porous member; a contact angle of the ink at an inner surface of the nozzle of the nozzle plate and a contact angle of the ink at an ink ejection side surface of the nozzle plate are greater than a contact angle of the ink at an inner surface of the first nozzle flow channel; and relationship among an internal ink pressure P1 in the ink supply side, an internal ink pressure P2 in the circulation flow channel, and an atmospheric pressure P3, is expressed as follows: P3>P1>P2.

[Object] To provide a liquid ejecting apparatus which is able to eject a liquid where the surface tension is comparatively low in a stable manner.[Solution] In relation to a driving signal for ejecting ink for textile printing where the surface tension is 22 [mN] or more and 30 [mN] or less from a nozzle, the interval between the first ejection driving pulse DP1 and the second ejection driving pulse DP2 and the interval between the second ejection driving pulse DP2 of a cycle T(n) and the first ejection driving pulse DP1 of a cycle T(n+1) are set to be Δt1. Due to this, in a case where medium dots are continuously formed over a plurality of continuous cycles, the ejecting intervals of the ink are set to be constant.

An inkjet ink is provided, which is hardly wettable to the surface of nozzle plates, and thus is stably ejected and is prevented from staining images. The inkjet ink is an oil-based inkjet ink which contains at least a pigment, a pigment-dispersing agent and a solvent constituted by at least an ester solvent, a salt of a long-chain polyaminoamide and a polar acidic ester in an amount of 1% by weight or more relative to the total amount of the ink.

An inkjet image forming apparatus which is provided with a line engine in which one or more recording heads are aligned in a main scanning direction and which has replacably configured an arbitrary one of the recording heads is disclosed. In the inkjet image forming apparatus, each of the recording heads includes a head tank mounted on the recording head, the head tank including a supply port and a discharge port for ink, the head tanks which are adjacent are mutually connected by a path in which the discharge port and supply port of the respective head tanks are coupled via a coupling unit, a path from the discharge port and a path to the supply port differ in an inner path diameter over the coupling unit, and the inner path diameter on the discharge port side is larger than the inner path diameter on the supply port side.

A liquid ejecting device and method control the flying characteristic of liquid while enabling stable ejection of the liquid, without shortening the life of bubble producing units (heating resistors). The liquid ejecting device has heads each including liquid ejecting portions arranged in parallel which each include a liquid cell, bisected heating resistors in the liquid cell which produce bubbles in liquid in the liquid cell in response to the supply of energy, and a nozzle for ejecting the liquid in the liquid cell by using the bubbles produced by the heating resistors. The heating resistors are supplied with energy, and a difference is set between a manner of supplying energy to one heating resistor and a manner of supplying energy to the other heating resistor. Based on the difference, a flying characteristic of the liquid ejected from the nozzle is controlled.

In an apparatus for ejecting droplets having nozzles that eject droplets, liquid containing chambers each connected at one longitudinal end thereof with a corresponding nozzle, and an actuator that changes a volume of each of the liquid containing chamber, an ejection pulse signal and an additional pulse signal each increasing the volume of the liquid containing chamber are sequentially applied in accordance with a one-dot printing instruction. When the volume of the liquid containing chamber decreases upon completion of the application of the ejection pulse signal, liquid becomes protruding from the nozzle. The additional pulse signal is then applied to pull a tail portion of the liquid back toward the liquid containing chamber, thereby ejecting a fine droplet. A time interval between a completion of the application of the ejection pulse signal and a start of the application of the additional pulse signal are set at defined times.