Patent ID: 8667658
Filing Date: 2014-03-11
Classification: B65H,Y10T

Abstract:
1. A calibration method for detecting a location mark printed on plate elements within a processing machine, wherein the machine comprises a successive series of operating stations through which the plate elements are to be conveyed, a conveyor configured and operable for conveying the plate elements through the stations, and gripping members on the conveyor for gripping the plate elements; an introducer configured and operable for positioning the plate elements into a plurality of the gripping members of the conveyor and the conveyor being configured and operable to convey the plate elements in rhythmical motion into the successive stations, the introducer including a fastening device configured and operable for fastening the plate elements temporarily to the introducer; a control unit driving motion of and temporarily attaching of the plate elements to the introducer; at least one illuminating device and at least one sensor illuminated by the illuminating device, the control unit controlling the illuminating device and the sensor; the method comprising: selecting a plate element from a batch of the plate elements to be processed, activating the fastening device to fix the selected plate element to the introducer, driving the introducer to perform a succession of back-and-forth movements with the plate element fixed to the introducer, also driving the illumination device and the sensor so that, at the time of each back-and-forth movement of the introducer: the illumination device subjects a location mark printed on the plate element to a different illumination, the sensor performs a corresponding measurement to each different illumination, so as to obtain a succession of measurements, according to the succession of measurements obtained, determining calibrated illumination parameters to be used during processing of a batch of the plate elements.