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    • 1. 发明授权
    • Obstructed-field-indicia-sensing device
    • 阻塞场指示传感装置
    • US4835720A
    • 1989-05-30
    • US838383
    • 1986-03-11
    • James W. DittoJames W. Jensen, Jr.
    • James W. DittoJames W. Jensen, Jr.
    • B65H23/188B65H23/04B65H26/00G06K7/016G06K7/14
    • G06K7/016B65H23/046G06K7/14
    • An apparatus for monitoring the phasing relationship of a moving web of material of the type having a repeating series of graphics patterns thereon which repeat at ordinarily constant distance repeat length intervals of web travel and which contain separate repeating indicia portions which define a repeating indicia set which are positioned in a repeating indicia path extending longitudinally of the web comprising: an indicia detection device for providing an indicia detection pulse signal; a web travel sensing device for providing a web movement signal; an indicia profiling device for processing the indicia pulse signal and the web monitoring signal for generating a unique indicia image for each of the repeating indicia in a selected repeat length portion of the web; an indicia image storage device for identifying and storing the indicia images from a first selected repeat length portion of the web; a register indicia designation device for initially designating one of the repeating indicia to be register indicia; a register indicia sensing device for providing a register indicia pulse signal having pulses which in normal operation corresponds to the detection of the selected register indicia; a register indicia verification device for verifying that the repeating indicia which is in synchronization with said register indicia pulse signal is the currently designated register indicia; and a register indicia correction device for designating the indicia that is in synchronization with said register indicia pulse signal as the register indicia and replacing the previously designated register indicia therewith when the indicia image of the current register indicia is not verified to be the indicia which is in synchronization with the register indicia pulse signal.
    • 一种用于监测其上具有重复的一系列图形图案的类型的材料的移动幅材的相位关系的装置,其重复以通常恒定的距离重复长度的纸幅行程间隔,并且包含单独的重复标记部分,其限定重复标记集合, 位于沿着网幅纵向延伸的重复标记路径中,包括:标记检测装置,用于提供标记检测脉冲信号; 纸幅行进传感装置,用于提供卷筒纸移动信号; 用于处理所述标记脉冲信号和所述幅材监测信号的标记分析装置,用于为所述幅材的所选重复长度部分中的每个重复标记产生唯一标记图像; 标记图像存储装置,用于从卷筒纸的第一选定的重复长度部分中识别和存储标记图像; 寄存器标记指定装置,用于最初指定重复标记中的一个作为寄存器标记; 寄存器标记检测装置,用于提供具有在正常操作中对应于所选寄存器标记的检测的脉冲的寄存器标记脉冲信号; 用于验证与所述寄存器标记脉冲信号同步的重复标记是当前指定的寄存器标记的寄存器标记验证装置; 以及寄存器标记校正装置,用于指定与所述寄存器标记脉冲信号同步的标记作为寄存器标记,并且当当前寄存器标记的标记图像未被验证为是当前寄存器标记的标记时,替换先前指定的寄存器标记, 与寄存器标记脉冲信号同步。