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    HUMIDIFICATION IN A PNEUMATIC BUILD MATERIAL TRANSPORT SYSTEM
    2.
    发明申请
    HUMIDIFICATION IN A PNEUMATIC BUILD MATERIAL TRANSPORT SYSTEM 审中-公开

    公开(公告)号：WO2019194839A1

    公开(公告)日：2019-10-10

    申请号：PCT/US2018/026629

    申请日：2018-04-07

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： ROMAN, Justin M. ,  SOSNOWSKI, Luke P. ,  OTIS, JR., David R.

    IPC: B29C64/321 ,  B33Y40/00 ,  B65G53/10

    Abstract: In one example, a pneumatic transport system to transport build material in an additive manufacturing machine includes a conduit, a source of air pressure to pull or push a stream of air through the conduit, a source of build material to introduce a build material into the stream of air, a separator to remove build material from the stream of air, a flow meter downstream from the separator to measure the stream of air flowing through the conduit, and a controller operatively connected to the flow meter and to the source of air pressure and/or the sources of build material to, based on a measurement from the flow meter, adjust a rate of flow of the stream of air in the conduit.

    MEDIA SKEW CORRECTION
    3.
    发明申请
    MEDIA SKEW CORRECTION 审中-公开
    媒体偏移修正

    公开(公告)号：WO2017099729A1

    公开(公告)日：2017-06-15

    申请号：PCT/US2015/064505

    申请日：2015-12-08

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： BHIDE, Saurabh ,  GONZALEZ, Rafael ,  SOSNOWSKI, Luke P. ,  EMERY, Joseph

    IPC: B65H9/00 ,  B65H9/20

    CPC classification number: B65H9/00 ,  B65H7/06 ,  B65H9/002 ,  B65H2220/02 ,  B65H2511/242 ,  B65H2557/61 ,  B65H2220/01

    Abstract: Media skew correction is performed by determining a leading edge skew value for the media and selecting a respective media model from a memory for a media type, each media model including a paired slope and an intercept. Based on the paired slope and intercept for the respective media model, differential velocity of a pair of aligned media feed rollers in a media feed mechanism is adjusted to correct a trailing edge skew for the media to within a desired operational window.

    Abstract translation: 通过确定媒体的前沿歪斜值并从媒体类型的存储器中选择各媒体模型来执行媒体歪斜校正，每个媒体模型包括成对的斜率和截距。 基于相应介质模型的成对斜率和截距，调节介质进给机构中的一对对齐的介质进给辊的差速度，以将介质的后缘歪斜校正为期望的操作窗口内。

    HUMIDIFICATION IN A BUILD MATERIAL RECOVERY SYSTEM
    5.
    发明申请
    HUMIDIFICATION IN A BUILD MATERIAL RECOVERY SYSTEM 审中-公开

    公开(公告)号：WO2019209288A1

    公开(公告)日：2019-10-31

    申请号：PCT/US2018/029362

    申请日：2018-04-25

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： ROMAN, Justin M. ,  SOSNOWSKI, Luke P.

    IPC: B29C64/321 ,  B33Y40/00 ,  B65G53/14 ,  B29C64/357

    Abstract: In one example, a build material recovery system for additive manufacturing includes: a receiving station to receive a portable container containing a build material; a separator to remove build material from a stream of air; a first conduit to carry build material in the stream of air from the receiving station to the separator; a source of negative air pressure to pull the stream of air with the build material through the first conduit from the receiving station to the separator; a humidifier to add moisture to the stream of air; and a second conduit to carry build material from the separator to the receiving station.

    SKEWING PRINT MEDIUM
    6.
    发明申请
    SKEWING PRINT MEDIUM 审中-公开
    打印打印介质

    公开(公告)号：WO2017010988A1

    公开(公告)日：2017-01-19

    申请号：PCT/US2015/040231

    申请日：2015-07-13

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： SOSNOWSKI, Luke P. ,  MACKENZIE, Mark H.

    IPC: B41J29/38 ,  B41J29/393 ,  B41J2/07

    CPC classification number: B41J13/26 ,  B41J2/07 ,  B41J11/0095 ,  B41J13/0027 ,  B41J13/03 ,  B41J29/38 ,  B41J29/393 ,  B65H5/062 ,  B65H7/20 ,  B65H9/002 ,  B65H2404/133 ,  B65H2511/216 ,  B65H2511/414 ,  B65H2701/1311 ,  B65H2220/03 ,  B65H2220/01 ,  B65H2220/02

    Abstract: In one example implementation, a printing device may comprise a number of media skewing rollers to skew a print medium to a predetermined angle with respect to a media feed path and a print engine to print an image on the skewed print medium, the print engine skewing a digital representation of the image based on the predetermined angle such that the image printed is aligned with the print medium. In another example implementation, a printing device may comprise a number of skewing rollers to skew a print medium to a predetermined angle with respect to a media path, a number of pinch rollers to receive the skewed print medium prior to printing, and a print engine skewed to the same predetermined angle as the skewed print medium.

    Abstract translation: 在一个示例性实施方式中，打印装置可以包括多个介质偏斜辊，以将打印介质相对于介质进给路径和打印引擎倾斜到预定角度，以在歪斜的打印介质上打印图像，打印机倾斜 基于预定角度的图像的数字表示，使得打印的图像与打印介质对准。 在另一示例性实施方式中，打印装置可以包括多个偏斜辊，以使打印介质相对于介质路径偏斜到预定角度，多个夹送辊在打印之前接收倾斜的打印介质，以及打印引擎 倾斜到与倾斜的打印介质相同的预定角度。

    PARTICULATE HEIGHT CALCULATIONS FROM PRESSURE GRADIENTS
    7.
    发明申请
    PARTICULATE HEIGHT CALCULATIONS FROM PRESSURE GRADIENTS 审中-公开

    公开(公告)号：WO2019212520A1

    公开(公告)日：2019-11-07

    申请号：PCT/US2018/030308

    申请日：2018-04-30

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： SOSNOWSKI, Luke P. ,  REGNIER, Tait A. ,  STALLBAUMER, Philip J. ,  LAMBRIGHT, Terry ,  KING, Richard

    IPC: B29C64/393 ,  B33Y50/02 ,  G01F23/14

    Abstract: According to examples, an apparatus may include a first pressure sensor to measure a first pressure level at a first height within a particulate material contained in a container and a second pressure sensor to measure a second pressure level at a second height within the container, in which a gas is to be supplied into the particulate material at a predefined velocity, wherein the first pressure sensor is to measure the first pressure level and the second pressure sensor is to measure the second pressure level while the gas is supplied into the particulate material at the predefined velocity. The apparatus may also include a controller that may determine a pressure gradient from the first pressure level and the second pressure level and calculate a height of the particulate material in the container from the determined pressure gradient.

    MEDIA ALIGNMENT CALIBRATION
    9.
    发明申请
    MEDIA ALIGNMENT CALIBRATION 审中-公开
    媒体校准校准

    公开(公告)号：WO2017099731A1

    公开(公告)日：2017-06-15

    申请号：PCT/US2015/064517

    申请日：2015-12-08

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： BHIDE, Saurabh ,  GONZALEZ, Rafael ,  SOSNOWSKI, Luke P.

    IPC: B41J29/38 ,  B41J29/393 ,  B41J13/00 ,  B65H7/20

    CPC classification number: B41J13/00 ,  B41J13/0018 ,  B41J29/38 ,  B41J29/393 ,  B65H7/06 ,  B65H9/002 ,  B65H2220/02 ,  B65H2511/242 ,  B65H2557/61 ,  B65H2220/01

    Abstract: A media alignment calibration system determines a slope relating a trailing edge skew value to its paired leading edge skew value and an intercept representing native skew based on a linear regression of a predetermined number of a set of paired leading and trailing edge skew values for a media type stored in a buffer. Based on the slope and intercept, a media model for the media type is updated based on the linear regression to adjust a differential velocity of a pair of aligned media feed rollers in a media feed mechanism to correct both a future native skew and future paired leading and trailing edge skew values in the buffer to within a desired operational window.

    Abstract translation: 媒体对准校准系统基于预定数量的一组配对的前导的线性回归来确定将后缘歪斜值与其配对的前缘歪斜值相关联的斜率和表示本地歪斜的截距 以及存储在缓冲器中的媒体类型的后端倾斜值。 基于斜率和截距，基于线性回归来更新媒体类型的媒体模型，以调整媒体馈送机构中的一对对齐的媒体馈送辊的差速度，以校正将来的本地歪斜和将来的成对领先 以及将缓冲器中的后沿歪斜值移动到期望的操作窗口内。

    SKEW SENSOR CALIBRATION
    10.
    发明申请
    SKEW SENSOR CALIBRATION 审中-公开
    偏移传感器校准

    公开(公告)号：WO2017074470A1

    公开(公告)日：2017-05-04

    申请号：PCT/US2015/058514

    申请日：2015-10-30

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： LIU, Hsue-Yang ,  SOSNOWSKI, Luke P. ,  MACKENZIE, Mark H.

    IPC: B41J29/393 ,  B41J29/38

    CPC classification number: B41J29/38 ,  B41J2/175 ,  B41J11/0095

    Abstract: A skew sensor calibration unit including a scanner providing a scanned image of a sheet as the sheet is conveyed along a transport path, the scanned image including a leading edge of the sheet and a skew detection pattern printed thereon by a printhead. A calibration module measures a top skew of the sheet based on position signals from a plurality of skew sensors indicating a position of a leading edge of a sheet as the sheet is conveyed along the transport path, measure an image skew of the sheet relative to the printhead based on the scanned image, and generates a calibration factor that when applied to the measured top skew provides a calibrated top skew that matches the image skew.

    Abstract translation: 包括扫描仪的歪斜传感器校准单元，所述扫描仪在片材沿着传送路径传送时提供片材的扫描图像，所述扫描图像包括片材的前缘和印刷在其上的歪斜检测图案 由打印头。 校准模块基于来自多个偏斜传感器的位置信号来测量片材的顶部歪斜，该位置信号指示片材沿着传送路径传送时片材的前缘的位置，测量片材相对于片材的图像歪斜 基于扫描图像的打印头，并生成校准系数，该系数在应用于测量的顶部歪斜时提供与图像歪斜匹配的校准顶部歪斜。

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