| Patent application number | Description | Published |
|---|
| 20080284807 | INK-JET RECORDING APPARATUS - An ink-jet recording apparatus of one aspect of the invention comprises nozzles are arranged on an ink ejection surface in a matrix in a first direction in which a recording medium is conveyed and a second direction orthogonal to the first direction. The plurality of nozzles are grouped into a plurality of nozzle sets, each of the plurality of nozzle sets includes nozzles arranged along the second direction. The plurality of nozzle sets are spaced from one another in the first direction by first distances, each of the first distances is an integral multiple of a distance that is obtained by multiplying a unit distance by 2 | 11-20-2008 |
| 20080303865 | Ink-jet printer, ink-jet head and method of manufacturing the ink-jet head - A piezoelectric sheet of an ink-jet head includes dummy individual electrodes in addition to individual electrodes which corresponds to respective nozzles. The dummy individual electrodes are in an outer periphery of the individual electrodes. FPC board applies drive voltage to the individual electrodes in a drive area, and deforms the area in the piezoelectric sheet in the direction of an ink pressure chamber, while the drive voltage is not applied to the individual electrodes of the non-drive area. When the dummy individual electrodes are formed in the non-drive area, a boundary area of the drive area and the non-drive area is uniformly fired when the piezoelectric sheet is manufactured. In the drive area, since surrounding structures of the respective individual electrodes become equal to one another, ink discharge characteristic is substantially uniform in the boundary area of the drive area and the non-drive area. | 12-11-2008 |
| 20080316257 | Ink-jet head having passage unit and actuator units attached to the passage unit, and ink-jet printer having the ink-jet head - An ink-jet head having a passage unit including pressure chambers each having one end coupled to a nozzle and the other end to be coupled to an ink supply source. The pressure chambers are arranged along a plane to neighbor each other. The ink-jet head further includes actuator units attached to a surface of the passage unit for changing the volume of each pressure chamber. Each actuator unit includes pressure generation portions respectively corresponding to pressure chambers, and is formed to extend over the pressure chambers. The actuator units are arranged along the longitudinal direction of the passage unit so that each neighboring actuator units partially overlap each other in the lateral direction of the passage unit. Each actuator unit has a basic region where many pressure generation portions are formed in a matrix, and an additional region neighboring the basic region in the lateral direction of the passage unit. In the additional region, pressure generation portions are formed to correspond to a gap portion between the pressure generation portions in the basic region of the actuator unit and the pressure generation portions in the basic region of another actuator unit neighboring that actuator unit. | 12-25-2008 |
| 20090073227 | Ink-jet head having passage unit and actuator units attached to the passage unit, and ink-jet printer having the ink-jet head - A printhead module includes a plurality of rows of printhead nozzles, at least some of the rows including at least one displaced row portion, the displacement of the row portion including a component in a direction normal to that of a pagewidth to be printed, wherein the displaced row portions of at least some of the rows are different in length than the displaced row portions of at least some of the other rows. | 03-19-2009 |
| 20090139087 | METHOD OF MANUFACTURING ACTUATORS, A METHOD OF MEASURING A THICKNESS OF AN ACTIVE LAYER OF AN ACTUATOR, A METHOD OF MANUFACTURING A RECORDING HEAD, AND A RECORDING DEVICE - A method of manufacturing actuators includes the step of measuring an absolute value of a coercive voltage of an active layer. The method further includes the step of sorting the actuators based at least on the coercive voltage. | 06-04-2009 |
| 20090189959 | Ink-jet head and ink-jet printer having ink-jet head - An inkjet head comprises a plurality of individual electrodes each of which includes a first part and a second part connected to an end portion B of the first part. The end portion B is one of the end portions of a first part in a longitudinal direction of a pressure chamber. The second part of each of the individual electrodes corresponding to a first pressure chamber line is positioned between two first parts corresponding to two respective pressure chambers neighboring each other in a second pressure chamber line, so that an end portion C of the second part crosses over a line connecting each end portion D of the two first parts. | 07-30-2009 |
| 20090237455 | INKJET HEAD - An inkjet head may include a main-body block, which may include a reservoir configured to store ink, an ink supply port configured to supply the ink to the reservoir, and a plurality of nozzles in fluid communication with the reservoir via an ink flow path. The inkjet head may include a supply valve mechanism attached to the main-body block and configured to selectively set the ink supply port in one of a sealed state and an open state. The inkjet head may further include an attachment unit configured to be removably attached to the main-body block. The attachment unit may include a supply channel configured to supply the ink to the ink supply port. The supply valve mechanism may set the ink supply port in the sealed state when the attachment unit is detached from the main-body block, and set the ink supply port in the open state when the attachment unit is attached to the main-body block. | 09-24-2009 |
| 20090237470 | AUXILIARY PASSAGE UNIT, LIQUID DISCHARGE HEAD HAVING THE SAME ATTACHED THERETO, ATTACHMENT, INK JET HEAD HAVING THE SAME ATTACHED THERETO, AND INK JET PRINTER - An auxiliary passage apparatus, an attachment, a liquid discharge head, and a ink jet head are provided. The auxiliary passage apparatus is detachably attached to a liquid discharge head and includes a main body portion including, a first surface, a second surface, a supply passage formed in the first surface and through which liquid passes to a discharge head, and an ejection passage formed in the second surface and through which liquid which is ejected from the discharge head passes. A part of the supply passage includes a first annular projection formed so as to protrude in a direction orthogonal to the first surface and a first flexible film adhered to a distal end of the first annular projection. A part of the ejection passage crosses an area on the second surface which is opposed to an area surrounded by the first annular projection. | 09-24-2009 |
| 20100066784 | LIQUID EJECTING APPARATUS - A liquid ejecting apparatus, including: a liquid ejecting head having a plurality of liquid-ejection openings, a liquid channel, and a plurality of actuators; an inflow liquid temperature sensor which detects a temperature of a liquid to be flowed into the liquid channel from an outside; a driver IC which is disposed so as to be thermally connected to the liquid ejecting head, which includes a signal producing circuit configured to produce an ejection signal, a non-ejection signal, and a vibration signal; and a controller including: a storing section configured to store drive data of the plurality of actuators; a first estimating section configured to estimate a first heat amount; a second estimating section configured to estimate a second heat amount; and a signal-producing-circuit controlling section configured to cause the signal producing circuit to produce the ejection signal, the non-ejection signal, and the vibration signal, wherein the signal-producing-circuit controlling section controls the signal producing circuit such that an increased heat amount exceeds a third heat amount. | 03-18-2010 |
| 20100182364 | Liquid Ejecting Apparatus and Method of Controlling the Same - A method of controlling a liquid ejecting apparatus including a liquid ejecting head having a supply portion, an ejecting portion, a discharge portion, and a filter portion dividing an internal passage within the head into an upstream passage communicating with the supply and discharge portions and a downstream passage communicating with the ejecting portion, and further including pumps respectively connected to the supply and discharge portions, and a control portion configured to control the pumps so as to satisfy P | 07-22-2010 |
