Abstract:
PROBLEM TO BE SOLVED: To make a halftone text part, mixed in an image, easily viewable by preventing a color from appearing on the text part such as halftone characters and signs, when an achromatic color is obtained from ink of a chromatic color so that printing can be done on a gray scale. SOLUTION: The text part is extracted from image data; the density of the extracted text part is recognized, and converted into a maximum density or a minimum density; the achromatic color is obtained from two or more inks of chromatic colors; and the image part and the text part, converted into the maximum density or the minimum density, are printed on the gray scale. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To stabilize liquid ejection performance of a liquid ejection head by cleaning the nozzle surface effectively using a cleaner consisting of a cleaning roller and a cleaning blade. SOLUTION: In a printer comprising a print head 10 having a nozzle member 12 provided with a nozzle 13 for ejecting each color ink, and a cleaner 42 for wiping the nozzle surface 12a by moving relatively to the print head 10 and ejecting ink from the ink ejection nozzle 13, the cleaner 42 comprises a cleaning roller 14 and a cleaning blade 15 extending along the longitudinal direction of the nozzle surface 12a of the print head 10. The nozzle surface 12a is wiped by moving the cleaning roller 14 and the cleaning blade 15 relatively in a direction intersecting the longitudinal direction of the nozzle member 12 perpendicularly. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a cleaning member capable of performing wiping while moving in the longitudinal direction of a liquid ejection head, and to provide a cleaning device and a liquid ejector. SOLUTION: The cleaning device 40 comprises a cleaning member 41 performing wiping while moving in contact with the ink ejection surface of a print head 20 provided with an array of a plurality of ink ejection nozzles and having a planar ink ejection surface (22) partially provided with an array of protrusions (35) arrange substantially in parallel with the ink ejection nozzle array. The cleaning member 41 has a contact member 43 arranged in the direction intersecting the nozzle array provided on the ink ejection surface substantially perpendicularly and wiping only the part of the nozzle array while avoiding the array of protrusions (35). The cleaning device 40 comprises a mechanism 42 for moving the cleaning member 41 and the ink ejection surface relatively substantially in parallel with the nozzle array of the liquid ejection nozzle while touching them each other. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To solve the problem of a line head that a defect inherent to a nozzle is perceived easily as uneven density or streak in the print results. SOLUTION: An ejection controller 10 capable of ejecting ink drops of the same color and density from at least a plurality of arrays of nozzle group by controlling a head unit arranged with a plurality of arrays of nozzle groups in the printing direction of a recording object comprises a section 10A storing information for specifying a continuous area of arbitrary length including the defective nozzle, a section 10B for judging whether a destination nozzle of assigned gradation data is included in the continuous area of a nozzle group stored in the storage section 10A or not when print processing is performed, and a section 10C for assigning the gradation data to a nozzle at the same position as other nozzle group capable of ejecting an ink drop of the same color with the same density when the destination nozzle of assigned gradation data is stored in the continuous area. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To help realize the miniaturization and cost saving of a discharge surface protecting device. SOLUTION: In this discharge surface protecting device, a discharge surface protecting cover 61 for a head cartridge 2 removed from a printing device 1 is constituted so that this cover 61 can be easily replaced with any other discharge protecting cover having a different function in accordance with use applications. Thus cleaning members designed for various use applications need not be provided inside the device as is the case with a conventional device. In addition, the miniaturization of the whole device and its cost saving can be achieved. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a liquid discharge cartridge capable of preventing a color shift, a liquid discharger, and a liquid discharge method. SOLUTION: In printing, the liquid discharge cartridge makes a paper holding roller 44 abut on an ink-droplet arrival surface of recording paper P which is carried up to a position to face an discharge surface 41. Thus, the deflection of the recording paper P to the side of the discharge surface 41 is suppressed, and the color shift can be prevented from being caused because ink i reaches the recording paper P bent in a thickness direction. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To suppress fluctuation in air pressure of a front space part in a moving direction. SOLUTION: A blade part 53, which is molded in an approximate plate shape by using an elastic material and which tip part is moved in a slide-rubbed state by being kept in a pressure contact state throughout the width-direction area of an almost flat head surface 32a, so as to remove adhering foreign matter, is formed in this cleaning blade 50. At least one air vent part 54 piercing in the moving direction is formed in the blade part 53, and air in the front space part in the moving direction is made to flow out to a rear space part, so that the fluctuation of the air pressure can be suppressed. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To inexpensively manufacture a liquid ejecting head while ensuring high positional accuracy of the nozzle forming surface between head chips. SOLUTION: The liquid ejecting head is manufactured through a first step for mounting a plurality of head modules 10 on a base fixture 51 while arranging, a second step for arranging a head frame 2 on the base fixture 51 from above while sustaining arranged state of the head modules 10 and then inserting each head module 10 into the head module insertion hole 2a of the head frame 2, and a third step for bonding each head module 10 and the head frame 2 on the base fixture 51. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an inkjet head capable of preventing a malfunction due to a heat from occurring by adequately radiating the heat. SOLUTION: In a line head 35, ink is supplied to an ink channel 331 from an ink tank section 32 through an ink supply pipe 336 and a driving current is applied to a heating element 321 from a circuit on a printed board 360 through a terminal plate B 341 and a golden wire 342. In a nozzle applied with the current, a heating element 321 heats, a bubble is created on the surface of the heating element 321, and then ink having a volume roughly equal to that of the bubble is ejected from an ink ejection hole 311. While the heat by a heater chip 322 is accumulated a good deal by successive printing, as a fluid passage plate 330 made of an aluminum alloy is bonded to the heater chip 322, the heat generated on the heater chip 322 is efficiently radiated by the channel plate 330 so that it is possible to prevent a malfunction due to abnormal rising of the temperature from occurring. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To easily improve the processing accuracy of an ink ejecting part, reduce change in the ink droplet ejection amount, the ejection angle, or the like derived from dust introduction to the ink, and to prevent deterioration of the ink supply speed to the ink ejecting part. SOLUTION: An ink ejecting unit comprises a plurality of energy generating means 13 provided on a substrate member 11, an ink liquid chamber for pressuring an ink by the energy generated by the energy generating means 13, and a nozzle having an ejection opening for ejecting the ink pressured in the ink liquid chamber. The internal space of the nozzle 17 serves also as the ink liquid chamber without the need of forming an ink liquid chamber independently by disposing a nozzle 17 above the energy generating means 13, and providing the opening surface on the energy generating means 13 side of the nozzle 17 as an ink inlet opening 17b and the opening surface on the other side as an ink ejecting opening 17a. COPYRIGHT: (C)2003,JPO