| Patent application number | Description | Published |
|---|
| 20080259119 | INK JET HEAD - An ink jet head includes an elongated ink supply port extending in a longitudinal direction and a plurality of head groups arranged in a transverse direction crossing with the longitudinal direction. A first array of ink ejection outlets is disposed along one lateral side of an ink supply port, and second and third arrays of ink ejection outlets are disposed along the other lateral side of the ink supply port, wherein widths L | 10-23-2008 |
| 20090015639 | INK JET RECORDING HEAD - An ink jet recording head includes ejection resistors for generating thermal energy for ejecting ink; warming resistors for generating thermal energy for heating the ink; ejection outlets, provided correspondingly to the ejection resistors, for ejecting the ink; and a recording element substrate provided with ink flow paths provided correspondingly to and for supplying the ink to the ejection outlets, the ejection resistors, the warming resistors, a first ejection outlet array portion including the ejection outlets, and a second ejection outlet array portion including the ejection outlets. An amount of one ink droplet to be ejected from an ejection outlet of the first ejection outlet array portion is different from that from an ejection outlet of the second ejection outlet array portion. The warming resistors are formed above the recording element substrate through the ejection resistors and an insulating layer with respect to a lamination direction of the recording element substrate and are disposed between the ejection resistors and the ink flow paths. The warming resistors include a first warming resistor disposed at the first ejection outlet array portion with a larger ejection amount and a second warming heat generating resistor disposed at the second ejection outlet array portion with a smaller ejection amount. | 01-15-2009 |
| 20090135226 | INK JET PRINT HEAD AND INK JET PRINTING APPARATUS - When paper dirt that could not be removed completely by the wiping gets trapped in the recessed portions formed in the ejection port face, the paper dirt may interfere with ejection ports, giving rise to a possibility of image impairments. To deal with this problem, the ejection ports and the recessed portions in the print head are shifted from each other so that their positions are not aligned in the wiping direction. | 05-28-2009 |
| 20090153620 | LIQUID EJECTION HEAD - A liquid ejection head includes a substrate having a supply port through which liquid is supplied and a plurality of energy generating elements provided along the supply port and generating energy for ejecting the liquid, a nozzle plate having nozzles provided therein in correspondence with the energy generating elements, and a channel provided between the substrate and the nozzle plate. The nozzle plate has a groove surrounding the channel. The groove includes a first groove provided in one surface of the nozzle plate at which the nozzle plate is bonded to the substrate, and a second groove provided in another surface of the nozzle plate in which the nozzles are provided. Edges of the first groove have sawtooth shape with a number of very small notches and edges of the second groove are substantially straight. | 06-18-2009 |
| 20090185000 | INK JET RECORDING HEAD AND INK JET RECORDING APPARATUS - A liquid ejection head includes a substrate including a liquid supply port for supplying liquid and a plurality of ejection energy generating elements, disposed along the liquid supply port, for generating energy for ejecting liquid droplets; and an ejection outlet plate including a plurality of ejection outlets, provided correspondingly to the plurality of ejection energy generating elements, for ejecting the liquid and including a plurality of liquid flow passages, provided correspondingly to the plurality of ejection outlets, for establishing communication between the ejection outlets and the liquid supply port. The ejection outlet plate is provided with a hole portion formed so as to surround the liquid flow passages. The hole portion includes a plurality of first holes which are arranged in a line and which have opening edges having a shape without an acute angle and further includes a plurality of second holes having opening edges formed in a substantially sawtooth shape, as seen in a direction perpendicular to a surface of the ejection outlet plate. | 07-23-2009 |
| 20090185001 | LIQUID EJECTION RECORDING HEAD - A liquid ejection recording head includes a recording element substrate including a plurality of energy generating elements for generating energy for ejecting liquid, and includes a flow passage-forming member, connected to the recording element substrate, comprising a plurality of ejection outlets corresponding to the plurality of energy generating elements and comprising a plurality of flow passages communicating with the ejection outlets. The flow passage-forming member includes a hole array consisting of holes arranged so as to surround the flow passages and includes a communication passage, for establishing communication between adjacent holes, at a position close to the recording element substrate. | 07-23-2009 |
| 20110120627 | METHOD OF MANUFACTURING LIQUID DISCHARGE HEAD, AND METHOD OF MANUFACTURING DISCHARGE PORT MEMBER - There is provided a method of manufacturing a liquid discharge head having a substrate including energy generating elements, and a discharge port member which is provided with discharge ports and is joined to the substrate, thereby forming liquid flow paths communicating with the discharge ports. The method performs in this order: preparing a conductive base on which a first insulating resist and a second insulating resist for forming the discharge ports are stacked in this order; performing plating using the first resist and the second resist as masks, and forming a first plated layer; removing the second resist; performing plating on the base using the first resist as a mask, thereby forming a second plated layer so as to cover the first plated layer; removing the base and the first resist, thereby forming the discharge port member; and joining together the substrate and the discharge port member. | 05-26-2011 |
| 20110139330 | METHOD FOR MANUFACTURING DISCHARGE PORT MEMBER AND METHOD FOR MANUFACTURING LIQUID DISCHARGE HEAD - A method for manufacturing a discharge port member used in a liquid discharge head, comprising in the following order, preparing a substrate at least whose surface is conductive, the substrate having, formed on said surface, a first insulating resist for forming a discharge port and a second insulating resist for forming a recessed portion of a wall of a flow path, forming on surface a first plating layer by plating using said first resist and said second resist as a mask, removing said second resist, forming a second plating layer on an exposed portion of said substrate from which said second resist has been removed, said second plating layer being formed by plating using said first resist as a mask, said second plating layer forming said recessed portion of said wall, and removing said first resist to form said discharge port and removing said substrate. | 06-16-2011 |
