Postage meter with improved handling of power failure
    1.
    发明授权
    Postage meter with improved handling of power failure 失效
    具有改善电源故障处理能力的邮资计费表

    公开(公告)号:US5712542A

    公开(公告)日:1998-01-27

    申请号:US562854

    申请日:1995-11-27

    IPC分类号: G07B17/00 G07B17/02 H02P5/46

    摘要: A postage meter has a print rotor rotated by a motor and the motor is capable of being started and stopped under processor control. State variables are established within a nonvolatile memory. The rotor begins in its home position. When a mail piece such as a letter is detected by a letter sensor, the processor sets a state variable. At some point (either before loss of power, or after restoration of power) the postage value to be printed is booked into the accounting register. The rotor motor is started. At some point (either before loss of power, or after restoration of power) the rotor reaches its home position again. A state variable is cleared. In this way, it is possible, even after the loss and restoration of power, to distinguish between a rotor that is in its home position because it has not yet printed postage (but needs to do so) and a rotor that is in its home position because the printing of postage has been completed. Similarly it is possible, even after the loss and restoration of power, to distinguish between accounting registers that are quiescent because they have not yet had a postage amount booked, and registers that are quiescent because the booking of postage has been completed. The postage meter is thus quite unlikely to print postage that has not been booked, or book postage that does not get printed, even in the face of power losses at unpredictable times, and even in the absence of a large-capacity reserve power supply.

    摘要翻译: 邮资计具有由电动机旋转的打印转子,并且电机能够在处理器控制下启动和停止。 在非易失性存储器中建立状态变量。 转子从其起始位置开始。 当通过字母传感器检测到诸如字母的邮件时,处理器设置状态变量。 在某些时候(在电力丧失或恢复电力之前),要打印的邮资值被记入会计登记册。 转子电机启动。 在某些时候(在功率损失或电源恢复之后)转子再次到达原来的位置。 状态变量被清除。 这样,即使在电力的损失和恢复之后,也可以区分由于尚未打印邮资(但需要这样做)的转子和位于其家中的转子而在其原位置的转子 因为邮资的打印已经完成。 同样地,即使在损失和恢复权力之后,也可能区分静止的会计登记册,因为它们还没有预订的邮资金额,而且由于订购邮资已经完成,所以登记成静止。 因此,即使在不可预测的时间内即使在没有大容量备用电源的情况下面对功率损失,邮资计费器也不太可能打印尚未预订的邮资,或者预订不打印的邮资。