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    2.
    发明专利
    未知

    公开(公告)号：DE69833050D1

    公开(公告)日：2006-02-02

    申请号：DE69833050

    申请日：1998-09-03

    Applicant: CANON KK

    Inventor： TACHIHARA MASAYOSHI ,  MIZUTANI MICHINARI

    IPC: B41J2/14 ,  B41J2/15

    Abstract: In order to enable high speed printing with maintaining reliability of ink ejection, auxiliary holes (13) are provided in an upper wall (15) forming a liquid passage. An opening area of the auxiliary holes is set to be greater than or equal to three times of an opening area of an ejection opening (12), and a minimum distance (L4) between the auxiliary holes (13) and the ejection opening (12) is set to be greater than or equal to three times of a height (H1) of the liquid passage (14).

    LIQUID EJECTION METHOD
    3.
    发明专利
    LIQUID EJECTION METHOD 未知

    公开(公告)号：CA2256928C

    公开(公告)日：2004-10-26

    申请号：CA2256928

    申请日：1998-12-23

    Applicant: CANON KK

    Inventor： KANEKO MINEO ,  TACHIHARA MASAYOSHI

    IPC: B41J2/05 ,  B41J2/14

    Abstract: A liquid ejection method includes a step of preparing a liquid ejection head including an electrothermal transducer element for generating thermal energy contributable to ejection of liquid, an ejection outlet for ejecting liquid, the ejection outlet being provided at a position opposed to the electrothermal transducer element, a liquid flow path in fluid communication with the ejection outlet to supply the liquid to the ejection outlet and having the electrothermal transducer element on its bottom side; a step of applying the thermal energy to the liquid to cause state change to the liquid to create a bubble, wherein the liquid is ejected through the ejection outlet by a pressure of the bubble; wherein the bubble is first in communication with the ambience in a process of reduction of the volume of the bubble after the bubble reaches a maximum volume.

    5.
    发明专利
    未知

    公开(公告)号：DE69331943D1

    公开(公告)日：2002-06-27

    申请号：DE69331943

    申请日：1993-12-21

    Applicant: CANON KK

    Inventor： ASAI AKIRA ,  TACHIHARA MASAYOSHI

    IPC: G06F17/21 ,  G06K15/02 ,  G06T11/20

    Abstract: In the invention, a plane region to which characters are output is divided into lattice-like elements (orthogonal lattice, triangular lattice, hexagonal lattice, etc.). In each element, an area ratio of the area to be output to the element is previously stored. The portion in the element in which the area ratio is equal to a first predetermined value (area ratio = 0) is not output. The portion in the element in which the area ratio is equal to a second predetermined value (area ratio = 1) larger than the first predetermined value is output. Further, the portion in the element in which the area ratio is larger than the first predetermined value and is smaller than the second predetermined value is regarded as a distribution of the continuous area ratio on the basis of the values of the area ratios of such an element and the elements therearound. The portion in which the area ratio is equal to or larger than a third predetermined value is output.

    7.
    发明专利
    未知

    公开(公告)号：DE69520461D1

    公开(公告)日：2001-05-03

    申请号：DE69520461

    申请日：1995-04-25

    Applicant: CANON KK

    Inventor： MORITA OSAMU ,  TACHIHARA MASAYOSHI

    IPC: B41J2/18 ,  B41J2/05 ,  B41J2/165 ,  B41J2/175 ,  B41J2/185

    Abstract: A liquid ejection printing apparatus can certainly and quickly perform preliminary ejection. The liquid ejection printing apparatus ejects droplet of a liquid state printing material through a printing head (10) to a medium to be printed for depositing the printing material to perform printing. The liquid ejection printing apparatus performs preliminary ejection upon the onset of power supply (13) and/or prior to initiation of printing with varying a drive frequency of the printing head during the preliminary ejection.

    8.
    发明专利
    未知

    公开(公告)号：ES2131521T3

    公开(公告)日：1999-08-01

    申请号：ES92305132

    申请日：1992-06-04

    Applicant: CANON KK

    Inventor： TANAKA HIDEKI ,  TAMURA YASUYUKI ,  TAKAHASHI HIROTO ,  TAKAGI SHINJI ,  SHIOYA MAKOTO ,  TACHIHARA MASAYOSHI

    IPC: B41J2/21 ,  B41J19/16 ,  B41J2/205

    Abstract: Each of pixels (No. 1 to N) of recorded image is formed by a plurality of dots composed with ink droplets ejected from a plurality of different orifices (No. 1 to M) at individual different main-scannings (No. 1, 2, 3 and so on). With this recording process, the variation of ink ejection characteristics between a plurality of orifices in a recording head can be reduced in forming pixels.

    9.
    发明专利
    未知

    公开(公告)号：DE69229065D1

    公开(公告)日：1999-06-10

    申请号：DE69229065

    申请日：1992-01-16

    Applicant: CANON KK

    Inventor： HIRASAWA SHIN ICHI ,  TAMURA YASUYUKI ,  TAKAHASHI HIROTO ,  SHIOYA MAKOTO ,  TACHIHARA MASAYOSHI ,  MAEDA HIROYUKI ,  INADA GENJI

    IPC: B41J2/14 ,  B41J2/05

    Abstract: A fluid ejection head comprises a heater (5) in a face within a fluid path (1). A bubble is generated by suppling electric power to the heater (5), and ink is ejected almost in a direction parallel to a face of the heater (5). The fluid path (1) further comprises a first part having a constant-section area being adjacent to an ejection orifice (2) a second part which exists behind the first part containing the heater, the cross-section area of the second part increasing by twice as large as the cross-section area of the ejection orifice (2), a length (A) between an end of the first part and a top end of the heater (5) is greater than or equal to a half of a height Ph of the ejection orifice.

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