Abstract: There are provided a liquid jet head and a liquid jet device capable of achieving reduction in size. There are included a first head chip and a second head chip stacked on one another in the Y direction, a first flow channel member disposed on the ?Y direction side of the first head chip, and having an inflow port communicated with an ink tank, and a first ink flow channel adapted to communicate the inflow port and the first head chip with each other, a second flow channel member disposed on the +Y direction of the second head chip, and having a second ink flow channel communicated with the second head chip, and a communication flow channel located between the first flow channel member and the second flow channel member, and adapted to communicate the first ink flow channel and the second ink flow channel with each other.

Abstract: There are provided a flow channel member, a liquid jet head, and a liquid jet device which prevent generation of bubbles in an ink flow channel, and are excellent in ejection performance. There is included a first flow channel plate provided with a first ink flow channel adapted to communicate an ink tank and a first head chip with each other, the first ink flow channel includes a narrow flow channel located on an upstream side, a filtration flow channel located on a downstream side with respect to the narrow flow channel, and a connecting flow channel adapted to connect the narrow flow channel and the filtration flow channel to each other, and the connecting flow channel gradually increases in flow channel width in a direction from the upstream side toward the downstream side, and decreases in flow channel depth in the direction from the upstream side toward the downstream side.

Abstract: There are provided a flow channel member, a liquid jet head, and a liquid jet device each capable of achieving thickness reduction while ensuring the effective area of a filter.

Abstract: There are provided a liquid jet head and a liquid jet device capable of achieving reduction in size. There are included a first head chip and a second head chip stacked on one another in the Y direction, a first flow channel member disposed on the ?Y direction side of the first head chip, and having an inflow port communicated with an ink tank, and a first ink flow channel adapted to communicate the inflow port and the first head chip with each other, a second flow channel member disposed on the +Y direction of the second head chip, and having a second ink flow channel communicated with the second head chip, and a communication flow channel located between the first flow channel member and the second flow channel member, and adapted to communicate the first ink flow channel and the second ink flow channel with each other.

Abstract: A liquid jet head has a head chip which ejects liquid droplets, a nozzle plate in contact with a lower surface of the head chip, a flexible circuit board in contact with the lower surface of the head chip, and a bending member in direct contact with the flexible circuit board and configured to bend the flexible circuit board along a lower corner of the head chip. The nozzle plate and the flexible circuit board contact the lower surface of the head chip in the same plane thereby saving space to enable downsizing of the liquid jet head.

Abstract: A liquid jet head according to the present invention is provided with a head chip which ejects liquid droplets, a flexible circuit board which is connected to the head chip, and a bending member which is located on the flexible circuit board and bends the flexible circuit board along a corner of the head chip.

Abstract: A pressure damper includes a main body portion and a flexible film mounted on the main body portion. The main body portion has upper end portion, a recessed portion having an opening portion opened in the upper end portion, and a communication port opened in an inner surface of the recessed portion to communicate with an outer region of the pressure damper. The upper end portion forms at least one bank that surrounds the opening portion. The at least one bank has a height larger than a height of an upper surface of the main body portion and a width smaller than a width of a side wall of the main body portion. The flexible film is bonded to an upper surface of the bank to close the opening portion.

Abstract: A liquid jet head has a nozzle plate with nozzle holes for ejecting a liquid. A wall portion surrounding the nozzle plate has an opening opposed to the nozzle holes. An opening and closing mechanism is configured in an open state to open the opening of the wall portion to expose the nozzle holes to an exterior of the head, and in a closed state to close the opening of the wall portion to form a closed space between the wall portion and the nozzle plate. A suction flow path has on one end side a suction port opening below the nozzle holes, and another end side is connected to a suction portion that evacuates the closed space to convert the closed space to a negative pressure chamber, thereby supplying the liquid to the nozzle holes. An atmosphere release portion switches between the open and closed states of the mechanism.

Abstract: A liquid injection head has a nozzle body having a row of nozzle holes and a nozzle guard that covers the row of nozzle holes. The nozzle guard has a top portion having formed therein a slit opposed to the row of nozzle holes, a sealing portion that seals an area between a peripheral edge of the top portion and the nozzle body, and a suction flow path having a suction port opening below the row of nozzle holes and communicating with a space on an inner side of the nozzle guard. A suction section connected to the suction flow path of the nozzle guard causes the space on the inner side of the nozzle guard to form a negative pressure chamber such that a liquid overflowing into the negative pressure chamber is sucked from the suction port of the suction flow path.

Abstract: Provided is a pressure damper (1) including: a main body portion (2) including: a recessed portion (3) having an opening portion (10) opened in an upper end portion; and a communication port (4) opened in an inner surface of the recessed portion to communicate to an outer region; and a flexible film (5) bonded to the upper end portion to close the opening portion. The upper end portion of the main body portion includes a bank (6) provided higher than an upper surface (HS) of the main body portion and surrounding the opening portion. The flexible film is bonded to an upper surface (DS) of the bank so that a bonding surface of the main body portion bonded to the flexible film is flat to improve a bonding strength and a sealing property between the flexible film and the main body portion.

Abstract: Provided are a liquid jet head and a liquid jet recording apparatus which are capable of improving ability to collect excess liquid to prevent contamination with excess liquid and which are capable of stabilizing jetting of liquid after the liquid is filled. A liquid jet head includes a nozzle guard (24) for covering a periphery of a nozzle column (31c), the nozzle guard having a slit (24c) formed therein which is opposed to the nozzle column (31c), and a suction flow path (15) connected to a suction pump for sucking excess ink which leaks from the nozzle column (31c), in which inside space of the nozzle guard (24) is partitioned into first space (S1) and second space (S2), and the first space (S1) and the second space (S2) communicate with each other via a communication hole group (31f) in a nozzle plate (31).

Abstract: A liquid jet head including: a wall portion (24) which surrounds a jetting hole column and protrudes in the same direction as a direction of openings of jetting holes; a lid member (62) which may open and close an opening formed in the wall portion; an opening and closing mechanism (60) for forming closed space between the wall portion and a jetting body (23) and for, in an open state, exposing the jetting holes to the outside; an absorber (40) provided on a back surface of the lid member, for absorbing liquid which overflows from the jetting holes; a suction flow path (15) which has a suction port (15a) that is open to the closed space and which is connected to an outside suction device (8); and an atmosphere release portion (33) which is switchable between release of the closed space to the outside and interruption thereof.

Abstract: A liquid jet head including: an opening and closing mechanism for, in an open state, opening a wall portion release opening (24n) to expose nozzle holes to outside and for, in a closed state, closing the wall portion release opening to form closed space between a wall portion (24) and a nozzle plate (31); a suction flow path (15) having, on one end side thereof, a suction port (15a) which is open below a nozzle column while another end side thereof being connected to a suction pump (16) for, by sucking an inside of the closed space with the suction pump, causing the closed space to become a negative pressure chamber to supply ink I from an ink tank of the ink to the nozzle holes; and an atmosphere release flow path (33) which is switchable between communication of the closed space with the outside and interruption thereof.

Abstract: To enhance a space factor and ability of collecting excess liquid, there is provided a liquid injection head provided with a plurality of nozzles includes a nozzle guard that is formed so as to cover the nozzles, the nozzle guard including: a top portion having a slit opposed to the nozzles while being placed apart from a surface of the nozzles; a sealing portion that seals an area between a peripheral edge of the top portion and the nozzles; and a suction flow path in which a suction port is opened to a lower portion of the nozzles, and is communicated to an inside space of the nozzle guard, in which the inside space of the nozzle guard is rendered a negative pressure chamber by a suction portion connected to the suction flow path, and a first liquid overflowing the nozzles to the negative pressure chamber is sucked.

Abstract: An ink-jet print head has a piezoelectric ceramic plate having grooves for receiving ink, a nozzle plate connected to the piezoelectric ceramic plate and having nozzle apertures each disposed in communication with respective ones of the grooves, and an ink storing device for storing ink. An ink chamber plate is connected to the piezoelectric ceramic plate and has an ink chamber for supplying ink from the ink storing device to the grooves. A base plate is connected to a side of the ink chamber plate and has an ink reservoir defining a portion of an ink flow path for transporting ink from the ink storing device to the ink chamber of the ink chamber plate. The ink reservoir has at least one tapered portion progressively diverging in a direction toward the ink chamber of the ink chamber plate.

Abstract: A pressure buffer of an ink-jet recording apparatus is placed in the vicinity of an ink-jet recording head in an ink supply path connecting an ink container to the ink-jet recording head. A body of the pressure buffer has a concave portion at least on one surface, and a flexible film is attached to tightly close the concave portion to form a chamber. The chamber has an ink flow outlet through which ink flows from the chamber to the ink-jet recording head and an ink flow inlet through which ink flows from the ink container to the chamber. The ink flow outlet is always positioned in an uppermost portion in a vertical direction of the chamber, and the ink flow inlet is positioned at an equal level or on a lower side in a vertical direction with respect to the ink flow outlet.

Abstract: To prevent corrosion and disconnection of an anisotropic conductor film due to ink and ink vapor and to eliminate discharge defects in an ink jet print head having a structure in which a head chip and a circuit substrate for driving the head chip are interconnected by an FPC substrate through the anisotropic conductor film, an outer periphery of the interconnecting portion is molded throughout a full range by a sealant so as to cut off the interconnecting portion from external air. The sealant is of an epoxy type, a silicone type or an acrylic type. An epoxy sealant having low viscosity (50 pa·s or below) and high hardness (85 or more: JISA standard) is used for a first layer sealant of the interconnecting portion and a silicone sealant having high viscosity (70 pa·s or more) is used for a second layer sealant to achieve a two-layered molding structure.

Abstract: An air damper for use with an ink jet head has a main body having an ink reservoir portion, and a film sealed to the main body and covering the ink reservoir portion to define therewith an ink reservoir. A reinforcement plate is attached to the main body and overlies the film to prevent rupture of the film due to expansion thereof when the ink jet head is pressure-filled with ink. The reinforcement plate has a recessed portion opposed to and facing the film to permit limited expansion of the film caused by pressure fluctuations of ink in the ink reservoir.

Abstract: An ink jet head has a substrate, partition walls disposed on a main surface of the substrate and spaced apart at a preselected interval to form channels for receiving ink. An ink chamber plate is connected to the substrate to define with the partition walls an ink chamber for supplying ink to the channels. A passage forming member is connected to the ink chamber plate and has an ink supply passage disposed in communication with the ink chamber for supplying ink contained in an ink storage device to the ink chamber and at least one ink discharge passage for discharging ink from the ink chamber. The ink discharge passage is independent from the ink supply passage so that ink is supplied directly to the ink chamber through the ink supply passage without passing through at least a portion of the ink discharge passage.

Abstract: A pressure buffer of an ink-jet recording apparatus is placed in the vicinity of an ink-jet recording head in an ink supply path connecting an ink container to the ink-jet recording head. A body of the pressure buffer has a concave portion at least on one surface, and a flexible film is attached to tightly close the concave portion to form a chamber. The chamber has an ink flow outlet through which ink flows from the chamber to the ink-jet recording head and an ink flow inlet through which ink flows from the ink container to the chamber. The ink flow outlet is always positioned in an uppermost portion in a vertical direction of the chamber, and the ink flow inlet is positioned at an equal level or on a lower side in a vertical direction with respect to the ink flow outlet.