Abstract: The liquid jet head is provided with: a piezoelectric body substrate which includes a groove row in which ejection grooves penetrating the piezoelectric body substrate from an upper surface through a lower surface and non-ejection grooves open on the upper surface are alternately arranged in a reference direction, common drive electrodes formed on both side surfaces of each of the ejection grooves, and individual drive electrodes formed on both side surfaces of each of the non-ejection grooves; and a cover plate which is bonded to the upper surface of the piezoelectric body substrate and includes a liquid chamber communicating with the ejection grooves, first through electrodes which penetrate the cover plate in a thickness direction and are electrically connected to the individual drive electrodes, and individual terminals which are placed on a front surface opposite to the piezoelectric body substrate and electrically connected to the first through electrodes.

Abstract: A liquid jet head is provided with: a nozzle plate which includes a nozzle array having a plurality of nozzle holes arranged side by side along a Y direction; an actuator plate which is laminated on the nozzle plate and includes a channel group having a plurality of first channels communicating with the nozzle holes, the first channels being arranged in parallel at intervals along the Y direction; and an inlet ink chamber and an outlet ink chamber both communicating with the first channels on opposite ends in an extending direction of the first channels. A film member which can be warp-deformed along with pressure fluctuation inside the inlet ink chamber and the outlet ink chamber is arranged as a part of inner surfaces of each of the inlet ink chamber and the outlet ink chamber.

Abstract: A liquid jet head is provided with an actuator substrate partitioned by elongated walls of a piezoelectric body and having elongated ejection grooves and elongated non-ejection grooves alternately arrayed thereon so as to penetrate the actuator substrate from an upper surface through a lower surface thereof; a cover plate provided on the upper surface and having first slits communicating with the ejection grooves on one side and second slits communicating with the ejection grooves on the other side; and a nozzle plate provided on the lower surface and having nozzles communicating with the ejection grooves. The non-ejection grooves extend, on the other side, up to a second-side peripheral end of the actuator substrate, and the actuator substrate is left to form raised bottom portions on bottoms of the non-ejection grooves near the second-side peripheral end.

Abstract: The liquid jet head is provided with a piezoelectric substrate having a plurality of groove rows in each of which elongated ejection grooves and elongated non-ejection grooves are alternately arranged in a reference direction. In adjacent ones of the groove rows, ends on a second side of ejection grooves included in a groove row located on a first side and ends on the first side of non-ejection grooves included in a groove row located on the second side are separated from each other, and overlap each other in a thickness direction of the piezoelectric substrate.

Abstract: A liquid jet head includes a piezoelectric body substrate having a plurality of groove arrays, in each of which ejection grooves penetrating from the upper surface to the lower surface are arrayed in a reference direction, drive electrode provided on side faces of the ejection grooves, and terminal electrodes provided on the lower surface, and electrically connected to the drive electrodes; and a flexible circuit board electrically connected from the terminal electrodes, and connected to the lower surface of the piezoelectric body substrate. The piezoelectric body substrate includes a first opening portion that penetrates from the upper surface to the lower surface between the plurality of groove arrays, and the flexible circuit board is led out from the lower surface to the upper surface of the piezoelectric body substrate through the first opening portion.

Abstract: A head chip for a liquid jet head of a recording apparatus has liquid jet channels arranged in a longitudinal direction of the head chip, and nozzle holes that communicate with the liquid jet channels. A flow path plate covers the liquid jet channels and has first and second circulation paths that extend in the longitudinal direction of the head chip and communicate with the liquid jet channels to supply liquid thereto. First and second inflow ports are provided at opposite longitudinal ends of the head chip for inflowing liquid into the first and second circulation paths, respectively, so that liquid flows through the first and second circulation paths in opposite directions while being supplied to the liquid jet channels. The sum of pressures of liquid supplied to each liquid jet channel from the first and second circulation paths is uniform throughout the longitudinal direction of the head chip so that high image quality is realized.

Abstract: A liquid jet head includes a piezoelectric body substrate on which ejection grooves penetrating from an upper surface to a lower surface and non-ejection grooves open on the lower surface are alternately arranged in a reference direction and form a groove row, a cover plate that includes a liquid chamber communicating with the ejection grooves and is bonded on the upper surface of the piezoelectric body substrate, a nozzle plate that includes nozzles communicating with the ejection grooves and is bonded on the lower surface of the piezoelectric body substrate. Common drive electrodes are installed on side surfaces of the ejection grooves, which are on the lower-surface side from nearly 1/2 of a thickness of the piezoelectric body substrate, and individual drive electrodes are installed on side surfaces of the non-ejection grooves, which are on the lower-surface side from nearly 1/2 of a thickness of the piezoelectric body substrate.

Abstract: An inkjet printer has an ink jet head mounted on a carriage for ejecting ink onto a recording medium. A heater is arranged in the casing and above the ink jet head for heating the ejected ink. A first intake fan is mounted on the casing for feeding outside air into the casing. A second intake fan is mounted on the carriage for taking the fed outside air directly into the carriage so that the temperature inside the carriage can be set close to the temperature of the outside air to enable stable ejection of ink. Air fed into the casing is discharged to the outside through an exhaust duct passing through the casing and disposed at a position spaced from the print surface of the recording medium to prevent a decrease in temperature of the recording medium and ejection failure of the ink.

Abstract: A liquid jet head is provided with: a nozzle plate which includes a nozzle array having a plurality of nozzle holes arranged side by side along a Y direction; an actuator plate which is laminated on the nozzle plate and includes a channel group having a plurality of first channels communicating with the nozzle holes, the first channels being arranged in parallel at intervals along the Y direction; and an inlet ink chamber and an outlet ink chamber both communicating with the first channels on opposite ends in an extending direction of the first channels. A film member which can be warp-deformed along with pressure fluctuation inside the inlet ink chamber and the outlet ink chamber is arranged as a part of inner surfaces of each of the inlet ink chamber and the outlet ink chamber.

Abstract: In a head chip, a cover plate includes a positioning reference provided at a position facing at least one of nozzle holes through at least one liquid jet channel. The positioning reference can be detected from underneath the nozzle plate through the nozzle hole and the liquid jet channel. A method of manufacturing the head chip includes a positioning step for positioning the nozzle plate by detecting the positioning reference provided in the cover plate.

Abstract: The liquid jet head includes a nozzle guard as a liquid storage unit configured to store the residual liquid attaching to the nozzle plate. Channel lines include a dummy channel incapable of driving. Liquid is supplied into the dummy channel while being brought to a negative pressure. The nozzle plate includes a dummy nozzle hole communicated with the dummy channel. The dummy nozzle hole is formed at a position to aspirate the residual liquid stored using the nozzle guard.

Abstract: The liquid jet head includes an actuator substrate on which a plurality of grooves is arranged, and a nozzle plate having nozzle holes communicated with the grooves. Drive electrodes extending in an X direction and insulating films covering a part of both side surfaces of a wall portion are installed on both of the side surfaces of the wall portion. Each of the drive electrodes are installed on the surface of the wall portion around the nozzle hole 11 and holds the insulating films with the wall portion at both of the X-direction ends.

Abstract: A liquid jet head according to an embodiment of the present invention includes an actuator substrate having slender ejection grooves and slender non-ejection grooves partitioned by slender walls each including a piezoelectric body. The non-ejection grooves have, at ends on one side thereof, respective inclined surfaces rising from bottom surfaces thereof to upper surface openings at upper portions thereof, common electrodes are provided in a strip form along a longitudinal direction of walls on both side surfaces of the walls facing the ejection grooves, active electrodes are provided in a strip form along the longitudinal direction of the walls on both side surfaces of the walls facing the non-ejection grooves, and the active electrodes are provided from positions in the vicinity of the ends on one side of the non-ejection grooves to ends on the other side thereof.

Abstract: A liquid jet head is provided with an actuator substrate partitioned by elongated walls of a piezoelectric body and having elongated ejection grooves and elongated non-ejection grooves alternately arrayed thereon so as to penetrate the actuator substrate from an upper surface through a lower surface thereof; a cover plate provided on the upper surface and having first slits communicating with the ejection grooves on one side and second slits communicating with the ejection grooves on the other side; and a nozzle plate provided on the lower surface and having nozzles communicating with the ejection grooves. The non-ejection grooves extend, on the other side, up to a second-side peripheral end of the actuator substrate, and the actuator substrate is left to form raised bottom portions on bottoms of the non-ejection grooves near the second-side peripheral end.

Abstract: A liquid jet head is provided with an actuator substrate which is partitioned by elongated walls of piezoelectric body and has elongated grooves arrayed thereon so as to penetrate the substrate from an upper surface through a lower surface thereof, a cover plate which is attached to the substrate so as to cover upper surface openings of the grooves and has a liquid supply chamber which supplies liquid to the grooves, and a nozzle plate which is attached to the substrate so as to cover lower surface openings of the grooves and has nozzles communicating with the respective grooves. Drive electrodes are formed in strip form on side surfaces of the walls along the longitudinal direction thereof so as to be separated from the nozzle plate. The nozzle plate has a lower stiffness than the cover plate.

Abstract: A liquid jet head according to an embodiment of the present invention includes an actuator substrate formed by arraying a plurality of grooves, which penetrates from an upper surface to a lower surface of the actuator substrate and is long in a surface direction, a cover plate provided at the actuator substrate so as to cover an upper surface opening of the groove, and a nozzle plate provided at the actuator substrate so as to cover a lower surface opening of the groove. The groove includes an ejection groove and a non-ejection groove which are alternately arrayed, and is formed in such a manner that configurations of the lower surface openings of the ejection groove and the non-ejection groove are different.

Abstract: A liquid jet unit is provided with a circulation path through which liquid is circulated, a liquid jet head which includes an inflow port, an outflow port and a flow path between the inflow port and the outflow port, the flow path constituting a part of the circulation path, and ejects liquid from a nozzle communicating with the flow path, a liquid pump which circulates liquid in the circulation path, a supply path which supplies liquid to the circulation path, and a pressure sensor which generates pressure information according to the pressure of liquid in the circulation path. The liquid pump changes the amount of liquid to be fed on the basis of the pressure information to maintain liquid in the nozzle at a predetermined pressure and draw liquid into the circulation path from the supply path.

Abstract: A head chip includes an actuator substrate having channels for liquid ejection formed therein, and a cover plate having a liquid supply chamber for supplying liquid to the channels, the cover plate being stacked on the actuator substrate. A flow path member mounted to the cover plate supplies the liquid to the liquid supply chamber. The flow path member includes an inflow port through which the liquid flows in, an outflow port through which the liquid flows out, and a circulation path along which the liquid is circulated from the inflow port to the outflow port. No filter is interposed in either the flow path between the inflow port and the channels or the flow path between the outflow port and the channels. The sectional area of the circulation path in a direction orthogonal to the circulating direction of liquid flow is larger than that of the liquid supply chamber.

Abstract: When an infrared-ray radiation device is arranged immediately above an ink jet head, the infrared-ray radiation device causes the temperature of a carriage to rise, resulting in ejection failure of ink. Further, employing a heat insulation material for the carriage requires cost and space for the heat insulation material. Even when a fan is mounted to an apparatus to introduce outside air, the temperature in the vicinity of the carriage is not easily decreased because the carriage is located at the center of the apparatus. When the outside air is actively introduced in a direction toward the carriage, the following problems arise. That is, the temperature of a recording medium is dropped, and hence the ink landing on the recording medium causes fixing failure. Further, the air is led to a nozzle surface of the ink jet head, and hence ejection failure occurs.

Abstract: Provided are a head chip, a liquid jet head, and a liquid jet recording apparatus, which can reduce the effect on image quality due to difference in volume of jetted liquid caused by pressure loss of the liquid during the liquid is in the process of circulating through a liquid flow path. The head chip includes first and second circulation paths (21a and 21b) extending along the longitudinal direction of the head chip so as to communicate to portions of a plurality of liquid jet channels, which are away from nozzle holes on an upstream side. The first and second circulation paths (21a and 21b) enable liquid to flow, the liquid being supplied to the plurality of liquid jet channels, and form liquid flows which are symmetrical with each other in the longitudinal direction of the head chip.