Abstract: A fluid tank includes a tank main body that contains a fluid and a bubble removing device that is provided inside the main body and removes bubbles in the fluid. The main body includes a partition and a delivery port through which the fluid is fed to outside. The bubble removing device has an outflow port through which the fluid from which the bubbles have been removed flows to the inside of the main body and a bubble exhaust port through which the bubbles which have been removed are discharged to the inside of the main body. The delivery port is provided adjacent to the outflow port relative to the partition. The partition partitions the inside of the main body into a side in which the outflow port and the delivery port are provided and a side of the bubble exhaust port.

Abstract: A fluid tank includes a tank main body that contains a fluid and a bubble removing device that is provided to an inside of the tank main body and removes bubbles contained in the fluid. The tank main body includes a partition that partitions the inside of the tank main body to at least two sides and a delivery port through which the fluid is fed to an outside. The bubble removing device has an outflow port through which the fluid from which the bubbles have been removed flows to the inside of the tank main body and a bubble exhaust port through which the bubbles which have been removed are discharged to the inside of the tank main body. The delivery port is provided adjacent to the outflow port relative to the partition. The partition partitions the inside of the tank main body to a side in which the outflow port and the delivery port are provided and a side of the bubble exhaust port.

Abstract: A hydraulic excavator is equipped with one or more downsizing scheme including at least one of: (i) a bubble removing device for removing bubbles in hydraulic fluid, (ii) a hydraulic tank including a main tank and a variable capacity tank arranged separately from each other, and (iii) a variable capacity tank or hydraulic tank which is fitted to the rear surface of the upper cover of the seat-side block. Thus, the lateral section of the seat can be ultimately downsized to provide a large space around the seat. Then, unlike the prior art, a canopy or a cab of a larger hydraulic excavator can be securely arranged on the upper swing body of a small hydraulic excavator. Since such large parts can be commonly used with large hydraulic excavators, it is possible to significantly reduce the cost of the hydraulic excavator.

Abstract: A hydraulic excavator is equipped with one or more downsizing scheme including at least one of: (i) a bubble removing device for removing bubbles in hydraulic fluid, (ii) a hydraulic tank including a main tank and a variable capacity tank arranged separately from each other, and (iii) a variable capacity tank or hydraulic tank which is fitted to the rear surface of the upper cover of the seat-side block. Thus, the lateral section of the seat can be ultimately downsized to provide a large space around the seat. Then, unlike the prior art, a canopy or a cab of a larger hydraulic excavator can be securely arranged on the upper swing body of a small hydraulic excavator. Since such large parts can be commonly used with large hydraulic excavators, it is possible to significantly reduce the cost of the hydraulic excavator.

Abstract: A fluid tank fluid is provided which includes a bubble removing device provided therein to remove bubbles from the fluid. The bubble removing device includes a cyclone chamber for generating a swirling current in the fluid flowing therethrough to separate bubbles from the fluid. At least one outflow port is provided through which the fluid from which the bubbles have been separated flows from the cyclone chamber. And an exhaust port is provided through which the bubbles separated from the fluid are driven from the cyclone chamber.

Abstract: A recording ink, includes: a coloring agent; a surfactant; a penetrant; and a defoaming agent. The recording ink includes 3.0×107 (quantity/5 ?l) or less coarse particles each having a particle diameter of 0.5 ?m or more, and an amount of a particle having a particle diameter of from 1 ?m to under 5 ?m in the coarse particles is 1% by number or less.

Abstract: A hydraulic excavator is equipped with one or more downsizing scheme including at least one of: (i) a bubble removing device for removing bubbles in hydraulic fluid, (ii) a hydraulic tank including a main tank and a variable capacity tank arranged separately from each other, and (iii) a variable capacity tank or hydraulic tank which is fitted to the rear surface of the upper cover of the seat-side block. Thus, the lateral section of the seat can be ultimately downsized to provide a large space around the seat. Then, unlike the prior art, a canopy or a cab of a larger hydraulic excavator can be securely arranged on the upper swing body of a small hydraulic excavator. Since such large parts can be commonly used with large hydraulic excavators, it is possible to significantly reduce the cost of the hydraulic excavator.

Abstract: A recording ink, includes: a coloring agent; a surfactant; a penetrant; and a defoaming agent. The recording ink includes 3.0×107 (quantity/5 ?l) or less coarse particles each having a particle diameter of 0.5 ?m or more, and an amount of a particle having a particle diameter of from 1 ?m to under 5 ?m in the coarse particles is 1% by number or less.

Abstract: A hydraulic excavator is equipped with one or more than one downsizing scheme of arranging a bubble removing device for removing bubbles in hydraulic fluid, using a hydraulic tank including a main tank (51) and a variable capacity tank (52) arranged separately from each other and/or fitting the variable capacity tank (52) to the rear surface of the upper cover. Thus, the lateral section of the seat can be ultimately downsized to provide a large space around the seat. Then, unlike the prior art, a canopy or a cab of a large hydraulic excavator can be securely arranged on the upper swing body of a small hydraulic excavator. Since such large parts can be commonly used with large service vehicles, it is possible to significantly reduce the cost of the service vehicle.

Abstract: A cyclone type bubble removing device 30 is arranged in a hydraulic tank 1. Therefore, it is no longer necessary to secure a space for installing a bubble removing device 30 outside the tank 1 and hence the space dedicated to the hydraulic system can be reduced. Since the bubble removing device 30 is fitted to the inside of the hydraulic tank 1 in advance, it does not need to be installed separately somewhere in the hydraulic circuit so that the installing operation can be performed quickly. Additionally, the outflow ports 322 for causing hydraulic fluid from which bubbles have been removed to flow out and the exhaust port 333 for expelling bubbles are arranged separately so that it is possible to expose the exhaust port 333 to the drain space 127. Thus, if the hydraulic tank 1 is rocked to a large extent, the hydraulic fluid coming out of the outflow ports is not mixed with bubbles and hence bubbles can be eliminated reliably.

Abstract: An image recording method for forming an image on a recording material includes the steps of (a) applying to a recording material a colorless or light colored image recording acceleration liquid containing a compound which is capable of making insoluble a coloring agent contained in a recording liquid which comprises the coloring agent and a solvent for dispersing or dissolving the coloring agent, and (b) depositing the recording liquid imagewise on the recording material by ejecting the recording liquid in the form of droplets onto the recording material, the image recording acceleration liquid further containing at least one of surfactants represented by any of formulae (1) to (5) as specified in the specification, and an image formation apparatus for carrying out the above image formation method is provided.

Abstract: An aqueous ink composition contains a colorant and a humectant, and has a surface tension &ggr; of less than 50 mN/m when measured by a maximum bubble pressure method at 25° C., with a bubble frequency &ngr; of the aqueous ink composition being set at less than 1 Hz, and a surface tension &ggr; of more than 40 mN/m when measured by the maximum bubble pressure method at 25° C., with the bubble frequency &ngr; of the aqueous ink composition being set at more than 5 Hz. In addition, an ink-jet printing method for forming ink images on an image-receiving medium has the step of ejecting the above-mentioned aqueous ink composition in the form of droplets according to the recording signals at a recording frequency of 8 kHz or more.

Abstract: An aqueous ink composition contains a colorant and a humectant, and has a surface tension .gamma. of less than 50 mN/m when measured by a maximum bubble pressure method at 25.degree. C., with a bubble frequency .nu. of the aqueous ink composition being set at less than 1 Hz, and a surface tension .gamma. of more than 40 mN/m when measured by the maximum bubble pressure method at 25.degree. C., with the bubble frequency .nu. of the aqueous ink composition being set at more than 5 Hz. In addition, an ink-jet printing method for forming ink images on an image-receiving medium has the step of ejecting the above-mentioned aqueous ink composition in the form of droplets according to the recording signals at a recording frequency of 8 kHz or more.

Abstract: A recording ink composition contains a colorant which is soluble or dispersible in water and includes at least one phthalocyanine compound of formula (1) which may have a halogen atom as a substituent and at least one of phthalocyanine compounds of formulas (2) and (3); a dispersant which includes at least one polymeric compound having a hydrophilic moiety and a hydrophobic moiety, and/or at least one surfactant having an alkyl group having 5 or more carbon atoms; water; and a humectant. In addition, images with a resolution of 10 dots/mm.times.10 dots/mm or more can be recorded on an image receiving medium by ejecting the above-mentioned recording ink composition in the form of droplets by the application of thermal or mechanical energy thereto onto an image receiving medium with a Stockigt size degree of 3 seconds or more, with the recording ink composition being deposited in an amount of 20 pl/mm.sup.2 to 200 pl/mm.sup.2 on the image receiving medium.

Abstract: A recording ink composition includes a colorant comprising a pigment which is soluble or dispersible in water, and a polymeric dye having a weight average molecular weight in a range of 5,000 to 15,000, a dispersant including at least one dispersant component selected from the group consisting of at least one polymeric compound having a hydrophilic moiety and a hydrophobic moiety, and/or at least one surfactant having an alkyl group having 5 or more carbon atoms, water, and a water-soluble organic solvent, and a method of recording images on an image receiving medium is performed, using the recording ink composition.

Abstract: An aqueous ink composition includes a dye component which contains a water-soluble xanthene dye or a water-soluble phthalocyanine dye, each of which includes a moiety of formula (I) when the water-soluble dye is in the form of a free acid, ##STR1## a surfactant. By use of this aqueous ink composition, a method of forming images on an image receiving medium is performed which includes the step of ejecting the aqueous ink composition in the form of droplets by the application of thermal or mechanical energy thereto onto an image receiving medium with a Stockigt size degree of 3 seconds or more as defined in the Japanese Industrial Standards P-8122.

Abstract: A device for removing a film-like image forming substance from a recording medium for thereby regenerating the medium. A supply section supplies to the medium a water-containing removal accelerating liquid which causes a swelling layer of the medium to swell more than the substance provided on the medium. A separating section presses, after the liquid has been supplied to the medium, a separating member against the medium with or without heating to thereby transfer the substance from the medium to the separating member and thereby regenerates the medium. A cleaning section removes impurities deposited on the separating member.

Abstract: A yellow ink composition for ink jet printing is composed of an aqueous solution which includes a water-soluble dye which containing (a) a dye compound of formula (I), ##STR1## and (b) at least one of a dye compound of formula (II) ##STR2## or a dye compound of formula (III) ##STR3## a surfactant, and a wetting agent. By use of this ink composition, a method of forming images on an image receiving medium is performed which includes the step of ejecting the aqueous ink composition in the form of droplets by the application of thermal or mechanical energy thereto onto an image receiving medium with a Stockigt size degree of 3 seconds or more.

Abstract: In a device for recycling a recording medium by removing a film-like image forming substance from the medium, a separating member contacts one side of the medium carrying the substance. The separating member is durable because its surface contacting the medium is provided with a measure against deterioration. Anticorrosion means reduces the deterioration rate of the separating member.

Abstract: This invention provides an aqueous ink composition, in which the composition satisfies several requirements for properties of an ink for ink-jet printing, has a superior tone for magenta color and has an improved waterfastness.