Abstract: An object of the present invention is to provide an ink jet print head having plural types of nozzles arranged on the same substrate and through which ink droplets of different sizes are ejected, the ink jet print head exhibiting acceptable ejection performance regardless of the type of the nozzle. Thus, according to the present invention, each of the plural types of nozzles includes a bubbling chamber having an ejection energy generating element allowing an ink droplet to be ejected to a position located opposite an ejection port and an ejection port portion allowing the ejection port and the bubbling chamber to communicate with each other. Ratio of opening area of the ejection port portion at a position where the ejection port portion and the bubbling chamber communicate with each other, to the opening area of the ejection port is higher for the nozzle with a smaller ejection amount.

Abstract: The present invention provides a print head that allows the characteristics of ejected ink to be adjusted for each ejection port in spite of a variation in the distance from an ink supply port to the heating element. In the print head according to the present invention, the area of the heating element decreases with increasing distance from the ink supply port and increases with decreasing distance from the ink supply port. The heating element is shaped like a rectangle that is longer in a direction orthogonal to a direction in which the plurality of ejection ports are arranged than in the direction in which the plurality of ejection ports are arranged. The aspect ratio of the heating element depends on the length of an ink channel through which ink is introduced into the bubbling chamber.

Abstract: An apparatus includes an ink jet head and a suction mechanism. The head includes liquid chambers connected with ink tanks by flow passages. The flow passages include a non-branching flow passage and a branching flow passage. The suction mechanism sucks the liquid chamber and ejection ports corresponding to the non-branching flow passage and the branching flow passage, respectively at substantially the same pressure. The distance from the flow passage junction to the ejection ports connected to the branching flow passage is shorter than the distance from the flow passage junction to the ejection ports connected to the non-branching flow passage. The volume of the liquid chambers corresponding to the branching flow passage is less than or equal to the volume of the liquid chamber corresponding to the non-branching flow passage.

Abstract: An ink jet recording head and an ink jet recording apparatus are provided to prevent occurrence of a white line or recording unevenness due to a head tilt, and realize a high image quality recording. For this purpose, in a recording head provided with nozzles ejecting three types of droplets, a large droplet, medium droplet and small droplet, nozzles are configured such that no nozzles are arranged on the same line at the centers thereof in the main scanning direction.

Abstract: A liquid ejecting head includes plural ejection outlets for ejecting droplets; liquid flow paths in fluid communication with the ejection outlets; and a liquid supply opening for supplying the liquid to the liquid flow paths. The ejection outlets include first and second ejection outlets disposed at least at one side of the liquid supply opening and are staggered. The first ejection outlets are nearer to the liquid supply opening than the second ejection outlets. Each of first recording elements corresponding to the first ejection outlets includes one rectangular heat generating resistor having a long side extending along a direction crossing with an arranging direction of the ejection outlets. Each of second recording elements corresponding to the second ejection outlets comprises plural rectangular heat generating resistors which are adjacent to each other at long sides thereof and are electrically connected in series.

Abstract: A liquid ejecting head includes a plurality of nozzles, each including an ejection outlet for ejecting a droplet, an ejection energy generating element, disposed at a position opposing the ejection outlet, for generating energy for ejecting a droplet, a pressure chamber provided with the ejection energy generating element and fluidly communicating with the ejection outlet, and a supply passage for supplying the liquid to the pressure chamber. The nozzles include a first nozzle and a second nozzle, which are connected with respective supply passages having lengths different from each other. The first nozzle and the second nozzle are disposed at one end portion with respect to a widthwise direction of an elongated supply chamber for supplying the liquid to the first nozzle.

Abstract: A liquid recording head includes a thermal energy generating element, having a flat plate configuration, for generating a bubble by thermal energy; a pressure chamber in which the thermal energy generating element is provided; a flow path for introducing liquid into the pressure chamber; a supply port in fluid communication with the flow path; and an ejection outlet provided at a position opposing the thermal energy generating element in fluid communication with the pressure chamber. The thermal energy generating element includes a first major surface facing the ejection outlet and a second major surface opposite the first major surface, and a distance between the first major surface and a ceiling surface of the pressure chamber in which the ejection outlet is formed is shorter than a distance between the second major surface and a bottom surface of the pressure chamber.

Abstract: An object of the present invention is to provide an ink jet print head having plural types of nozzles arranged on the same substrate and through which ink droplets of different sizes are ejected, the ink jet print head exhibiting acceptable ejection performance regardless of the type of the nozzle. Thus, according to the present invention, each of the plural types of nozzles includes a bubbling chamber having an ejection energy generating element allowing an ink droplet to be ejected to a position located opposite an ejection port and an ejection port portion allowing the ejection port and the bubbling chamber to communicate with each other. Ratio of opening area of the ejection port portion at a position where the ejection port portion and the bubbling chamber communicate with each other, to the opening area of the ejection port is higher for the nozzle with a smaller ejection amount.

Abstract: An object of the present invention is to provide an ink jet print head having plural types of nozzles arranged on the same substrate and through which ink droplets of different sizes are ejected, the ink jet print head exhibiting acceptable ejection performance regardless of the type of the nozzle. Thus, according to the present invention, each of the plural types of nozzles includes a bubbling chamber having an ejection energy generating element allowing an ink droplet to be ejected to a position located opposite an ejection port and an ejection port portion allowing the ejection port and the bubbling chamber to communicate with each other. Ratio of opening area of the ejection port portion at a position where the ejection port portion and the bubbling chamber communicate with each other, to the opening area of the ejection port is higher for the nozzle with a smaller ejection amount.

Abstract: A scanning speed for a carriage and a number of multi-pass are set in accordance with print density information of dots obtained from image data. This makes it possible to preferably output an image free from the occurrence of an end deviation without reducing throughput to a required extent or more.

Abstract: An apparatus includes an ink jet head and a suction mechanism. The head includes liquid chambers connected with ink tanks by flow passages. The flow passages include a non-branching flow passage and a branching flow passage. The suction mechanism sucks the liquid chamber and ejection ports corresponding to the non-branching flow passage and the branching flow passage, respectively at substantially the same pressure. The distance from the flow passage junction to the ejection ports connected to the branching flow passage is shorter than the distance from the flow passage junction to the ejection ports connected to the non-branching flow passage. The volume of the liquid chambers corresponding to the branching flow passage is less than or equal to the volume of the liquid chamber corresponding to the non-branching flow passage.

Abstract: An ink jet head movable in a main scan direction includes first and second groups of ejection outlet arrays disposed on either side of a common liquid chamber and including plural ejection outlet arrays. In the first group, amounts of liquid ejected from outlets of first and second ejection outlet arrays, which are staggered, differ from each other. In the second group, a common ejection amount ejection outlet array ejects the same amount of liquid as that of one of the first and second ejection outlet arrays and a non-common ejection amount ejection outlet array ejects an amount of the liquid that differs from that of the first ejection outlet array group. The ejection outlets of the common and non-common ejection amount ejection outlet arrays are disposed in a staggered arrangement. The ejection outlets of the second ejection outlet array group are disposed with deviation of ½ of an interval at which the ejection outlets of the first ejection outlet array group are arranged.

Abstract: A liquid ejecting head includes a plurality of nozzles each including an ejection outlet for ejecting a droplet, an ejection energy generating element, disposed at a position opposing the ejection outlet, for generating energy for ejecting a droplet, a pressure chamber provided with the ejection energy generating element and fluidly communicating with the ejection outlet, and a supply passage for supplying the liquid to the pressure chamber, wherein the nozzles include a first nozzle and a second nozzle which are connected with respective ones of the supply passages having lengths different from each other, wherein the first nozzle and the second nozzle are, disposed at one end portion with respect to a widthwise direction of an elongated supply chamber for supplying the liquid to the first nozzle, wherein the supply passage for the first nozzle extends in a direction perpendicular to a direction of liquid ejection from the ejection outlet and fluidly communicates with the supply chamber, and wherein the supp

Abstract: An object of the present invention is to provide an ink jet print head having plural types of nozzles arranged on the same substrate and through which ink droplets of different sizes are ejected, the ink jet print head exhibiting acceptable ejection performance regardless of the type of the nozzle. Thus, according to the present invention, each of the plural types of nozzles includes a bubbling chamber having an ejection energy generating element allowing an ink droplet to be ejected to a position located opposite an ejection port and an ejection port portion allowing the ejection port and the bubbling chamber to communicate with each other. Ratio of opening area of the ejection port portion at a position where the ejection port portion and the bubbling chamber communicate with each other, to the opening area of the ejection port is higher for the nozzle with a smaller ejection amount.

Abstract: A liquid recording head includes thermal energy generating means, having a flat plate configuration, for generating a bubble by thermal energy; a pressure chamber in which said thermal energy generating means is provided; a flow path for introducing liquid into said pressure chamber; a supply port in fluid communication with said flow path; and an ejection outlet provided at a position opposing said thermal energy generating means in fluid communication with said pressure chamber, wherein said thermal energy generating means includes a first major surface facing said ejection outlet and a second major surface opposite said first major surface, and wherein a distance between said first major surface and ceiling surface of said pressure chamber in which said ejection outlet is formed is shorter than a distance between said second major surface and a bottom surface of said pressure chamber.

Abstract: The present invention provides a print head that allows the characteristics of ejected ink to be adjusted for each ejection port in spite of a variation in the distance from an ink supply port to the heating element. In the print head according to the present invention, the area of the heating element decreases with increasing distance from the ink supply port and increases with decreasing distance from the ink supply port. The heating element is shaped like a rectangle that is longer in a direction orthogonal to a direction in which the plurality of ejection ports are arranged than in the direction in which the plurality of ejection ports are arranged. The aspect ratio of the heating element depends on the length of an ink channel through which ink is introduced into the bubbling chamber.

Abstract: A scanning speed for a carriage and a number of multi-pass are set in accordance with print density information of dots obtained from image data. This makes it possible to preferably output an image free from the occurrence of an end deviation without reducing throughput to a required extent or more.

Abstract: An ink jet recording head and an ink jet recording apparatus are provided to prevent occurrence of a white line or recording unevenness due to a head tilt, and realize a high image quality recording. For this purpose, in a recording head provided with nozzles ejecting three types of droplets, a large droplet, medium droplet and small droplet, nozzles are configured such that any nozzles are not arranged on the same line at the centers thereof in the main scanning direction.

Abstract: A liquid ejecting head includes a plurality of ejection outlets for ejecting droplets; liquid flow paths in fluid communication with said ejection outlets; and a liquid supply opening for supplying the liquid to said liquid flow path; wherein said ejection outlets include first ejection outlets and second ejection outlets which are disposed at least at one side of said liquid supply opening, wherein said first ejection outlets are nearer from said liquid supply opening than said second ejection outlets, and said first ejection outlets and said second ejection outlets are arranged in a staggered fashion; first recording elements for said first ejection outlets; second recording elements for said second ejection outlets, wherein each of said first recording elements includes one heat generating resistor in the form of a rectangular shape having a long side extending along a direction crossing with an arranging direction of said ejection outlets; and wherein said second recording element includes a plurality of

Abstract: An ink jet head movable in a main scan direction includes first and second groups of ejection outlet arrays disposed on either side of a common liquid chamber and including plural ejection outlet arrays. In the first group, amounts of liquid ejected from outlets of first and second ejection outlet arrays, which are staggered, differ from each other. In the second group, a common ejection amount ejection outlet array ejects the same amount of liquid as that of one of the first and second ejection outlet arrays and a non-common ejection amount ejection outlet array ejects an amount of the liquid that differs from that of the first ejection outlet array group. The ejection outlets of the common and non-common ejection amount ejection outlet arrays are disposed in a staggered arrangement. The ejection outlets of the second ejection outlet array group are disposed with deviation of ½ of an interval at which the ejection outlets of the first ejection outlet array group are arranged.