摘要:
An ink jet print head includes ink ejection outlets for ejecting ink, passages communicating with the ejection outlets; a common chamber for supplying the ink to the passages; ejection energy generating elements for producing energy for ejecting the ink; an ink supply passage for supplying the ink to the common chamber; a buffering chamber disposed at a position through which a pressure wave resulting from driving of the ejection energy generating elements propagate, the buffering chamber containing a gas for attenuating the pressure wave, wherein a part of a wall constituting the buffering chamber has a gas transmitting property.
摘要:
An ink jet color recording method forms a multi-color image on a single recording medium using a monochrome recording apparatus, which includes a mounting portion for detachably mounting an ink recording head for recording by ejecting a monochrome ink, a feed unit for feeding the recording medium, and a discharge unit for discharging the recording medium. First recording information is supplied to a first ink recording head, attached to the mounting portion, for ejecting a first ink, recording is performed using the first ink on the recording medium fed to the recording region by the feed unit, and the recording medium is discharged by the discharge unit. Next, second recording information is supplied to a second ink recording head, attached to the mounting portion in place of the first ink recording head, for ejecting a second ink, the recording medium, on which recording using the first ink has been completed, is fed to the recording region, recording is performed using the second ink, and the recording medium is discharged by the discharge unit. Subsequently, third recording information is supplied to a third ink recording head, attached to the mounting portion in place of the second ink recording head, for ejecting a third ink, the recording medium, on which recording using the first and second inks has been completed, is fed to the recording region by the feed unit, recording is performed using the third ink, and the recording medium is discharged by the discharge unit.
摘要:
A wiping mechanism for wiping an ink ejection side surface of an ink jet head for effecting recording by ejection of ink through ejection outlets includes a wiper for wiping the ejection side surface; and control mechanism for controlling operation of the wiper member in accordance with arrival of a carriage carrying the ink jet head and moving in a predetermined direction.
摘要:
An ink jet recording apparatus comprises an ejection orifice for ejecting an ink, a supply portion, communicating with the ejection orifice, for supplying an ink stored therein to the ejection orifice, an ejection energy producer, arranged in the supply portion, for applying energy for ink ejection to the ink, a pressure producer, arranged in the supply portion at a position different from the ejection energy producer, for producing a pressure wave in the supply portion, and a controller for controlling the pressure producer to produce a pressure wave different from a pressure wave produced in the supply portion by the ejection energy producer.
摘要:
An ink jet recording apparatus comprises a recording head having ink ejection orifices, and a common ink chamber communicating with the ink ejection orifices to supply the ink to the ink ejection orifices, a driver for non-simultaneously causing at least one of adjacent ones of the ejection orifices of the recording head to eject the ink, and a driving controller for changing an order of ejection performed by the driver.
摘要:
An ink jet print head includes ink ejection outlets for ejecting ink, passages communicating with the ejection outlets; a common chamber for supplying the ink to the passages; ejection energy generating elements for producing energy for ejecting the ink; an ink supply passage for supplying the ink to the common chamber; a buffering chamber disposed at a position through which a pressure wave resulting from driving of the ejection energy generating elements propagate, the buffering chamber containing a gas for attenuating the pressure wave, wherein a part of a wall constituting the buffering chamber has a gas transmitting property permitting introduction of gas external of the print head into the buffering chamber and preventing passage of ink from the common chamber through the gas transmitting member.
摘要:
An ink is ejected at the same timing from ejection orifices in a number corresponding to an ink quantity 7% or less of an ink quantity ejected from all the ejection enabled ejection orifices of a plurality of ejection orifices of a recording head, and the ink ejection period from all the ejection enabled ejection orifices is set to be 70% or more of the driving period. Since the quantity of an ink ejected per unit time is minimized, and the negative pressure level generated in a common ink chamber can be set to be closest to normal pressure, the amplitude of a refill oscillation is minimized to stabilize ejection, and the driving frequency can be further increased.
摘要:
An ink is ejected at the same timing from ejection orifices in a number corresponding to an ink quantity 7% or less of an ink quantity ejected from all the ejection enabled ejection orifices of a plurality of ejection orifices of a recording head, and the ink ejection period from all the ejection enabled ejection orifices is set to be 70% or more of the driving period. Since the quantity of an ink ejected per unit time is minimized, and the negative pressure level generated in a common ink chamber can be set to be closest to normal pressure, the amplitude of a refill oscillation is minimized to stabilize ejection, and the driving frequency can be further increased.
摘要:
In the case of printing in three-value level utilizing two kinds of inks mutually different densities for one color (higher and lower density inks), it is assumed that a reflection density of a region having a predetermined area when solid print is performed only by the lower density ink, and that when solid print is performed only by the higher density ink are expressed ODt and ODn, respectively. Since the granular appearance of the ink dots is expressed in terms of reflection density of one dot, the granular appearance of a lower density ink dot at a portion of image formed only by the lower density ink dots and the granular appearance of a higher density ink dot at a portion of image formed by the higher and lower density ink dots are expressed in terms of values of ODt and (ODn-ODt) divided by the number of pixels included in the above region, respectively. Accordingly, by making the reflection density ODt to be approximately one half of the reflection density ODn, the granular appearance produced by the lower density ink dot at the highlighted portion and the granular appearance produced by the higher density ink dot at the portion where the higher density ink dots scattered in the lower density ink dots can be made substantially equal to each other. For this purpose, it is preferable that a dye concentration of the lower density ink is to be about one fourth of that of the higher density ink.
摘要:
In the case of printing in three-value level utilizing two kinds of inks mutually different densities for one color (higher and lower density inks), it is assumed that a reflection density of a region having a predetermined area when solid print is performed only by the lower density ink, and that when solid print is performed only by the higher density ink are expressed ODt and ODn, respectively. Since the granular appearance of the ink dots is expressed in terms of reflection density of one dot, the granular appearance of a lower density ink dot at a portion of image formed only by the lower density ink dots and the granular appearance of a higher density ink dot at a portion of image formed by the higher and lower density ink dots are expressed in terms of values of ODt and (ODn-ODt) divided by the number of pixels included the above region, respectively. Accordingly, by making the reflection density ODt to be approximately one half of the reflection density ODn, the granular appearance produced by the lower density ink dot at the highlighted portion and the granular appearance produced by the higher density ink dot at the portion where the higher density ink dots scattered in the lower density ink dots can be made substantially equal to each other. For this purpose, it is preferable that a dye concentration of the lower density ink is to be about one fourth of that of the higher density ink.