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    Method for producing gradient tonal representations and a printhead for producing the same
    1.
    发明公开
    Method for producing gradient tonal representations and a printhead for producing the same 失效
    方法和打印头产生Gradiententondarstellungen

    公开(公告)号：EP0688130A3

    公开(公告)日：1996-03-13

    申请号：EP95303888.2

    申请日：1995-06-06

    Applicant: Compaq Computer Corporation

    Inventor： Wallace, David B.

    IPC: H04N1/40

    CPC classification number: H04N1/4057 ,  B41J2202/10

    Abstract: A method of producing, on a physical medium, a gradient tonal representation of an image and a printhead for producing the same. An input image is divided into first and second regions. First, continuously variable intensity level, continuous tone and second, discretely variable intensity level, half-tone portions of the representation which respectively correspond to the first and second regions of the image are then printed by depositing selected quantities of ink on the first and second portions of the physical medium such that each pixel thereof has an ink intensity level corresponding to the image intensity level for the corresponding one of the pixels of the first region of the image. The ink is deposited on the second portion of the physical medium by depositing a spot of ink having a first diameter on selected ones of the pixels of the second portion, depositing a spot of ink having a second diameter on others of the pixels of the second portion and depositing no ink on still others of the pixels of the second portion such that the second portion of the representation has the desired ink intensity level. The color of the ink ejected may be black, in which case, the gradient tonal representation produced thereby shall be a gray scale representation, or other color such as yellow, cyan or magenta.

    Method of manufacturing a high density ink jet printhead array
    2.
    发明公开
    Method of manufacturing a high density ink jet printhead array 失效
    Verfahren zur Herstellung einer hochverdichteten Farbstrahldruckkopfanordnung。

    公开(公告)号：EP0528649A2

    公开(公告)日：1993-02-24

    申请号：EP92307430.6

    申请日：1992-08-13

    Applicant: Compaq Computer Corporation

    Inventor： Pies, John R. ,  Wallace, David B. ,  Hayes, Donald J.

    IPC: B41J2/16 ,  B41J2/045

    CPC classification number: B41J2/1623 ,  B41J2/14209 ,  B41J2/1609 ,  B41J2/1618 ,  B41J2/1632 ,  B41J2002/14379 ,  Y10T29/42 ,  Y10T29/49401 ,  Y10T156/1064 ,  Y10T156/1082

    Abstract: Method for manufacturing a sidewall actuatable, high density channel array for an ink jet printhead (10). A first surface of a main body portion (12) formed from an inactive material is conductively bonded to a first surface of a first intermediate body portion (14) formed from an active material. A plurality of parallel grooves are then machined through the first intermediate body portion (14) and part of the main body portion (12) to form a plurality of channels (18) separated by a corresponding plurality of sidewall actuators comprised of a first sidewall section formed from an inactive material and a second sidewall section formed from an active material. A top body portion (16) is then conductively mounted to the intermediate body portion.

    Abstract translation: 一种用于制造用于喷墨打印头的侧壁致动，高密度通道阵列的方法。 由非活性材料形成的主体部分的第一表面导电地结合到由活性材料形成的第一中间体部分的第一表面。 然后通过第一中间体部分和主体部分的一部分来加工多个平行的凹槽，以形成由相应的多个侧壁致动器隔开的多个通道，该侧壁致动器包括由非活性材料形成的第一侧壁部分和第二侧壁 由活性材料形成。 然后将顶部主体部分导电地安装到中间体部分。

    Length-mode drop-on-demand ink jet printhead for ejecting orthogonally directed droplets at improved operating speeds
    6.
    发明公开
    Length-mode drop-on-demand ink jet printhead for ejecting orthogonally directed droplets at improved operating speeds 失效
    具有用于液滴喷射的细长通道-on按需喷墨打印头具有改进的工作速度正交定向

    公开(公告)号：EP0716926A3

    公开(公告)日：1997-04-16

    申请号：EP95309100.6

    申请日：1995-12-14

    Applicant: Compaq Computer Corporation

    Inventor： Good, Lowell M. ,  Wallace, David B.

    IPC: B41J2/16 ,  B41J2/045

    CPC classification number: B41J2/14209 ,  B41J2202/18

    Abstract: A length-mode ink jet printhead which includes an active lower body portion, a series of active intermediate body portions and an inactive upper body portion which collectively define a series of generally parallel channels which extend between front and rear side surfaces of the printhead. Each channel is bounded by first and second sidewalls, each comprised of a lower body projection and an intermediate body portion conductively mounted thereto. Formed in the upper body portion are a series of ink ejection orifices, each of which extends from the top side surface to a corresponding one of the series of channels and is located midway between the front and rear side surfaces of the printhead. Mounted on the front and rear side surfaces of the printhead are acoustic pressure wave reflection interfaces for respectively reflecting forwardly and rearwardly propagating pressure waves generated in the series of channels. An orthogonally directed droplet of ink is ejected from an ink ejection orifice by imparting an acoustic pressure wave to a selected channel in communication with the ink ejection orifice.

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