Canon Kabushiki Kaisha

Mineo Kaneko

Ken Tsuchii

Masaki Oikawa

Keiji Tomizawa

Shuichi Ide

Jiro Moriyama

Mitsuhiro Matsumoto

Toru Yamane

Kenji Yabe

Kansui Takino

Keiichiro Tsukuda

Toshiaki Hirosawa

Masayoshi Tachihara

Yutaka Koizumi

Torachika Osada

Hidemi Kubota

Naozumi Nabeshima

Shuichi Murakami

Yasuyuki Tamura

Takashi Inoue

Michinari Mizutani

Yuichiro Akama

Yasutomo Watanabe

Yoshiyuki Imanaka

Naoji Otsuka

Takaaki Yamaguchi

Nobuyuki Watanabe

Takuya Hatsui

Kimiyuki Hayasaki

Masashi Miyagawa

Souta Takeuchi

Yoshifumi Hattori

Muga Mochizuki

Yoshinori Nakajima

Kousuke Kubo

Yoichi Tosaka

Masafumi Wataya

Haruyuki Matsumoto

Hideaki Kishida

Akira Katayama

Hajime Yamamoto

Osamu Sato

Ryoji Inoue

Kiyomitsu Kudo

Nobuyuki Hirayama

Shuzo Iwanaga

Ryo Kasai

Makoto Shioya

Yasushi Miura

Kenta Udagawa

Osamu Morita

Masataka Sakurai

Tatsuo Furukawa

Takashi Watanabe

Tamaki Sato

Tadashi Yamamoto

Yasushi Murayama

Haruhiko Moriguchi

Isao Ebisawa

Kyota Miyazaki

Souhei Tanaka

Tetsuya Saito

Tsuguhiro Fukuda

Masayuki Kyoshima

Hajime Kishida

Takayoshi Tsutsumi

Hiroto Takahashi, Deceased

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.

Ink jet print head

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.

Print head

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.

Ink jet recording head and ink jet recording apparatus

A method for discharging liquid from a recording head including a first discharge port configured to discharge a liquid, a second discharge port configured to discharge a liquid, an amount of which is smaller than an amount of the liquid discharged from the first discharge port, and a substrate including a first heating element corresponding to the first discharge port, a second heating element corresponding to the second discharge port and the liquid supply port, wherein a distance between the liquid supply port and the second heating element is longer than a distance between the liquid supply port and the first heating element, and wherein discharge of the liquid from the first discharge port is performed by a discharge method in which a bubble formed by the first heating element communicates with atmosphere and an amount of the liquid discharged from the second discharge port is less than 2 pico liters.

Ink jet recording method

A liquid discharge head includes a substrate having a plurality of energy generating elements for generating heat energy for use in discharging liquid and a plurality of nozzles provided correspondingly to the plurality of energy generating elements. Each of the nozzles includes a chamber provided with the energy generating element, a second discharge portion, and a first discharge portion. The central axis of the second discharge portion is offset from the central axis of the first discharge portion in the nozzle arrangement direction.

Liquid discharge head

A liquid ejection head includes a plurality of ejection outlets for ejecting a liquid droplet; a plurality of flow paths communicating with the ejection outlets; an ink supply port for supplying liquid to the flow paths; and a plurality of heat generating elements provided correspondingly to the ejection outlets, for generating thermal energy for ejecting liquid present inside the flow paths. The plurality of heat generating elements is arranged in a staggered fashion with predetermined intervals with respect to a direction of a long side of the ink supply port. Adjacent staggered heat generating elements are connected to a common wiring line and are connected to individual wiring lines.

Liquid ejection head and recording apparatus

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.

Liquid jet head

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. 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 supply passage for the second nozzle extends in a direction parallel with the direction of liquid ejection.

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.

Ink jet recording head and liquid jetting method

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.

Ink jet printing apparatus and ink jet printing method

An ink jet recording head includes a first ink flow path array corresponding to a first recording element array, and a distance (La) between one end portion of an ink flow path and another end portion thereof across a first ink supply opening in the first ink flow path array is substantially equal to a distance (Lb) between one end portion of an ink flow path corresponding to a recording element located relatively far from a second supply opening and another end portion thereof across the second ink supply opening in a second ink flow path array.

Ink jet recording head, ink jet recording apparatus, and method of manufacturing ink jet recording head

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 &#xbd; of an interval at which the ejection outlets of the first ejection outlet array group are arranged. Different sets of the same cyan and magenta colors in the non-common ejection amount ejection outlet arrays are disposed with deviation of &#xbd; of an interval at which the ejection outlets of the non-common ejection amount ejection outlet arrays of other sets are arranged.

Ink jet recording head

In a recording apparatus using a recording head which can eject ink droplets having different sizes, a problem in which the recording image quality is decreased or mist is generated when the recording is performed on a predetermined area of a recording medium can be prevented. In the ink droplets having the different sizes, the size of the ink droplet used for the recording is set in accordance with the recording area to perform the recording based on the setting.

Recording apparatus and recording method

An ink jet recording head is provided with one heat generating member in each of ink flow paths, and the discharge port thereof is arranged on the extended line extending in the normal direction from the center of the main surface of the heat generating member to the surface of the substrate. Then, on the surface of the substrate, non-bubbling area is provided on the center within the projected area having the discharge port projected thereon. Bubble brought to the boil by the heat generating member pushes out ink from the discharge port by the pressure exerted by the bubble, while being communicated with the outside. With the structure thus arranged, it is made possible to enhance the precision of discharge direction of the liquid droplet discharged from the discharge port.

Ink jet recording head and ink discharge method

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Tokyo, Japan

Mineo Kaneko