An ink jet type recording head composed of a plurality of head units and having a large number of nozzles without greatly increasing the width of the recording head. Outer walls (1a, 1b) of a spacer 1 of the head unit are inclined at an angle θ with respect to the arrangement lines A-A, B-B of pressure generating chambers (2, 3). A plurality of head units (e.g., 40, 41) are arranged so that end surfaces of the head units in the arrangement direction of the pressure generating chambers (2, 3) are adjacent to each other. The head units are fixed to a base board (28) such that they are shifted in a direction roughly perpendicular to the arrangement direction of the pressure generating chambers (2, 3) and so that an interval between the pressure generating chambers (2, 3) of the adjacent head units is the same as the pitch between the pressure generating chambers (2, 3) on each individual head unit. Accordingly, it is possible to arrange the nozzle openings of the plurality of head units at a uniform pitch even over several head units and nonetheless maintain the width of the entire recording head as narrow as possible.

Ink jet type recording head

A liquid-ejecting head includes a channel which is in communication with a nozzle opening and which includes a pressure-generating chamber, a circulation channel that serves to circulate a liquid in the channel, and a pressure generator that serves to generate pressure change. The circulation channel has a narrow portion including a first wall and a second wall, the first wall tilting with respect to a forward direction of a liquid flows and serving to gradually decrease the cross-sectional area, the second wall tilting with respect to the flow direction and serving to gradually increase the cross-sectional area. The tilt angle of the first wall with respect to the inner surface of the circulation channel is larger than the tilt angle of the second wall with respect to the inner surface of the circulation channel at the downstream side.

Liquid ejecting head and liquid ejecting apparatus

An ink cartridge for an ink jet printer having a housing having at least one wall. The ink cartridge further has at least two ink chambers for containing different ink accommodated in the housing. Ink supply ports are formed in one wall of the housing within each of the ink chambers. Each of the ink supply ports has an inner opening and an outer opening. The distance from the inner opening of a first ink supply port to that of a second ink supply port adjacent to the first ink supply port is different from a second distance from the outer opening of the first ink supply opening to that of the second ink supply port.

Ink cartridge for ink-jet printing apparatus

An ink cartridge for an ink jet recording device, includes: a container having an ink supply port; at least two ink chambers partitioned in the container, one being located substantially in an upper section and the other being located substantially in a lower section; an ink suction passage connecting a bottom region of the lower section ink chamber to a bottom region of the upper section ink chamber; and a negative pressure generating mechanism provided to a flow passage connecting the upper section ink chamber to the ink supply port.

Ink cartridge for ink jet recording device

An ink jet type printing apparatus in which an ink supply needle is located near one side in a direction perpendicular to the reciprocated directions of a carriage, a circuit board is mounted on a wall of an ink cartridge in the vicinity of the side on which an ink supply port is formed and plural contacts for connecting to external control means are formed on the exposed surface of the circuit board.

Ink-jet printing apparatus and ink cartridge therefor

An ink-jet recording head includes a discharge-port portion including a first discharge-port portion continuing from a discharge port, and a second discharge-port portion communicating the first discharge-port portion with a bubble generation chamber. The second discharge-port portion has an end surface that includes a border portion bordering the first discharge-port portion and is parallel to a main surface of an element substrate. The cross-sectional area of the second discharge-port portion, anywhere from an opening surface facing the bubble generation chamber to an end surface facing the first discharge-port portion, that is parallel to the main surface of the element substrate, is larger than the area of the border portion. The cross section of the opening surface of the second discharge-port portion has a length in a direction perpendicular to an arrangement direction of the discharge ports that is greater than its length in a direction parallel to the arrangement direction.

Ink jet recording head

An ink cartridge for a printing apparatus providing ink to a print head through a tapered ink supply needle and removably attached to the print head. The ink cartridge comprises an ink chamber for containing ink, an ink supply port, a packing member and a valve device. The ink supply port supplies ink from the ink chamber to the print head of the printing apparatus, the ink supply port comprising an external opening. The packing member is provided in the ink supply port and forms an ink channel for allowing a flow of ink. The packing member seals the ink supply needle of the printing apparatus by fitting therewith. The valve device is contained in the ink supply port and elastically abuts against the packing member. The valve device selectively opens and closes the ink channel in conjunction with the ink supply needle.

Ink-jet printing apparatus and ink cartridge

An ink cartridge and an ink cartridge holder for maintaining the relative position between the information reading section of the ink cartridge holder and the information storing unit of the ink cartridge, which should be aligned accurately, even if the ink cartridge has instability to the ink cartridge holder due to the variation in each products. The ink cartridge which supplies ink to a recording apparatus includes: a substantially rectangular parallelepiped ink cartridge main body holding the ink; a connection electrode section provided on a part of a first side of the ink cartridge main body and including a connection terminal; an ink supply unit provided in a front surface which intersects the first wall; and a positioning section guiding a positioning member of the recording apparatus to the vicinity of the connection electrode on the front surface so that the positioning member opposes to the connection electrode section in the direction parallel with the connection electrode section.

Ink cartridge and ink cartridge holder

An inkjet recording apparatus is provided, which comprises a sub-tank unit mounted on a carriage for supplying ink to an ink jet record head and an ink replenishment unit connected to a main tank installed on a housing by a duct and being able to be connected to and disconnected from the sub-tank unit. The sub-tank unit comprises an ink injection port and an exhaust port that are communicated with an ink storage chamber via self-seal type valve means, and a valve mechanism for opening and closing the exhaust port based on a liquid level of ink, wherein ink is supplied to the ink storage chamber by negative pressure from negative pressure generation means for sucking air through the exhaust port. Also provided is an ink droplet ejection capability recovery method for a recording head of an ink jet recording apparatus for determining an amount of ink remaining in the sub-tank unit, replenishing the sub-tank unit with ink from the main tank, and performing a recovery operation.

Ink jet recording apparatus, sub-tank unit adapted thereto, and ink droplet ejection capability recovery method

An ink jet recorder, wherein ink is supplied to an ink storage chamber (25) owing to a vacuum occurring due to the suction of the air from an air discharge port (23), the inflow of the ink being stopped automatically by closing the air exhaust port (23) with a float valve (29) when the ink reaches a prescribed level.

Takeo Seino

Papers

Ink jet recording head

Ink-jet printing apparatus and ink cartridge

Ink cartridge and ink cartridge holder

Ink jet recording apparatus, sub-tank unit adapted thereto, and ink droplet ejection capability recovery method

Ink jet recorder, sub-tank unit suitable therefor, and method of recovering ink droplet discharging capability