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    • 1. 发明授权
    • Apparatus and methods of detecting relative position of RF signature on print media
    • 检测打印介质上RF签名的相对位置的装置和方法
    • US07249819B2
    • 2007-07-31
    • US10939634
    • 2004-09-13
    • Chris Anthony BurdetteKeith Bryan HardinMark Stephen UnderwoodTerry Lee Wells
    • Chris Anthony BurdetteKeith Bryan HardinMark Stephen UnderwoodTerry Lee Wells
    • B41J29/393
    • B41J29/393
    • The presence of a radio frequency signature (88) on a cut sheet of print media (28) is detected by a radio frequency interrogating device (94) to determine it's relative left/right position on the print media (28). Either the leading edge (124) or trailing edge (126) of the print media (28) is detected by one or more print media sensors (86, 90). A print controller (24) can note the time (t1) when print media is detected and cause the radio frequency interrogating device (94) to detect the radio frequency signature (88) at a time (t2) when the print media has reached a predetermined point along the print media pathway (110). The position of the radio frequency signature (88) on the print media (28) can be calculated using the time differential (t2-t1) and the known angular displacement of the radio frequency interrogating device (94).
    • 通过射频询问装置(94)检测在打印介质(28)的切片上的射频签名(88)的存在,以确定其在打印介质(28)上的相对左/右位置。 打印介质(28)的前缘(124)或后缘(126)都被一个或多个打印介质传感器(86,90)检测到。 当检测到打印介质时,打印控制器(24)可以记录时间(t 1> 1),并且使得射频询问装置(94)一次检测射频签名(88) 当打印介质已经到达沿着打印介质路径(110)的预定点时。 射频签名(88)在打印介质(28)上的位置可以使用时间差(t 2 -T 1 -T 1)和已知的角位移 的射频询问装置(94)。
    • 2. 发明授权
    • Apparatus and methods of detecting print media orientation
    • 检测打印介质方向的装置和方法
    • US07187294B2
    • 2007-03-06
    • US10897131
    • 2004-07-22
    • Chris Anthony BurdetteKeith Bryan HardinMark Stephen UnderwoodTerry Lee Wells
    • Chris Anthony BurdetteKeith Bryan HardinMark Stephen UnderwoodTerry Lee Wells
    • G08B21/00
    • B41J3/44B41J11/0095
    • A radio frequency signature (88) on a cut sheet of print media (28) is detected by a radio frequency interrogating device (94) to determine whether the print media (28) is properly oriented. The leading edge (124) or trailing edge (126) of the print media (28) is detected by one or more print media sensors (86, 90). A print controller (24) can note the time (t1) and cause the radio frequency interrogating device (94) to detect the radio frequency signature (88) at a time (t2) when the print media has reached a predetermined point along the print media pathway (110). The position of the radio frequency signature (88) on the print media (28) can be calculated using the time differential (t2−t1), the velocity profile of the print media and the known separation between the print media (28) and the radio frequency signature (88). By comparing the computer position with the expected position, the orientation of the print media (28) can be determined.
    • 通过射频询问装置(94)检测打印介质(28)的切片上的射频签名(88),以确定打印介质(28)是否被正确定向。 打印介质(28)的前缘(124)或后缘(126)由一个或多个打印介质传感器(86,90)检测。 打印控制器(24)可以记录时间(t 1> 1),并使射频询问设备(94)一次检测射频签名(88) 当打印介质已经到达沿着打印介质路径(110)的预定点时。 射频签名(88)在打印介质(28)上的位置可以使用时间差(t 2 -T 1 -T 1)来计算,速度分布 打印介质和打印介质(28)与射频签名(88)之间的已知间隔。 通过将计算机位置与预期位置进行比较,可以确定打印介质(28)的取向。