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    • 10. 发明授权
    • Electromechanical rotogravure stylus automatic calibrator
    • 机电凹版印刷机自动校准仪
    • US5828464A
    • 1998-10-27
    • US143552
    • 1993-10-26
    • Takumi YoshidaTadashi SyudouMinetoshi Yamaguchi
    • Takumi YoshidaTadashi SyudouMinetoshi Yamaguchi
    • B41C1/045G01B11/02B41C1/02
    • B41C1/045G01B11/024
    • In an electromechanical engraving system, rotogravure calibrating apparatus automatically adjusting the engraving operation of an engraving-head stylus of the system in real time by calibrating a stylus-actuating engraving signal according to a calibration factor relating printed image density to engraved cell depth for a designated engraving screen ruling corresponding to printed image resolution. The calibrating apparatus includes a cell observation and measuring device which obtains data for calculating cell size by imaging the form of individual test cells engraved by the stylus into the surface of a rotogravure printing cylinder, and an engraving signal calibrator which adjusts engraving signal control parameters according to the cell size calculation and to the calibration factor. The engraving signal calibrator derives an image-density/cell-depth reference characteristic computed according to cell size data from cells engraved to correspond to a representative series of test image densities at the designated screen ruling, and computes the calibration factor as a correction of the image-density/cell-depth reference characteristic, generating engraving signal gain data which accordingly adjust the engraving signal actuating the stylus. The engraving signal is rapidly and automatically adjusted through a simplified calibration of the stylus-actuating engraving signal, stabilizing stylus lateral displacement adjustments for consistency among printing operations.
    • 在机电雕刻系统中,凹版印刷校准装置通过根据将印刷图像密度相关联的校准因子校准到指定的印刷图像密度的刻蚀单元深度来自动调整系统的雕刻头触针的雕刻操作,从而实时地校准触针致动雕刻信号 雕刻屏幕对应于打印图像分辨率。 校准装置包括:细胞观察和测量装置,其通过将由触针刻录的各个测试单元的形式成像到凹版印刷滚筒的表面中,获得用于计算单元尺寸的数据;以及雕刻信号校准器,其根据 到细胞大小计算和校准因子。 雕刻信号校准器导出根据在刻划的细胞的细胞尺寸数据计算的图像密度/细胞深度参考特征,以对应于在指定筛选条件下的代表性的一系列测试图像密度,并且计算校准因子作为校正因子 图像密度/细胞深度参考特征,产生相应地调节致动触针的雕刻信号的雕刻信号增益数据。 雕刻信号通过触针致动雕刻信号的简化校准快速且自动地进行调整,稳定了针头横向位移调节,以实现打印操作的一致性。