Magnetic marker applying device for a printing press

A marker applying device for a printing press producing a printed web, comprising:

• a rotatable disc having spaced locations of relatively weak permanent magnets;
• a plurality of markers having magnetic material in a backing of the markers, and an adhesive on the front surface of the backing;
• a release sheet releasably retaining the markers on the release sheet by the adhesive;
• means for removing the markers from the release sheet and placing the removed markers on the spaced magnetized locations of the disc in a configuration with the backing facing the magnetized locations and the adhesive facing outwardly from the disc;
• an electromagnet producing a relatively strong magnetic force compared to the magnetized locations, with the markers sequentially facing the electromagnet in a configuration with the web being located intermediate the disc and electromagnet;
• means for electrically pulsing the electromagnet such that the pulsed electromagnet removes the markers from the disc and deposits the removed markers on the web such that they are retained on the web by the adhesive;
• means for sequentially rotatably driving the disc in synchronism with the pulsation of the electromagnet such that the markers are sequentially placed by the disc in a configuration facing the electromagnet preparatory to removing the markers from the disc;
• a cutting device to sever the web;
• means for sensing the location of the markers of the passing web;
• and
• means responsive to the sensing means for synchronizing the web to the cutting device.

A marker applying device for a substrate, comprising:

• a plurality of markers having magnetic material in the markers, and an adhesive on a surface of the markers;
• means for sequentially positioning the markers at an actuating location;
• an electromagnet positioned with the substrate being intermediate the electromagnet and positioning means, with the markers being sequentially positioned by the positioning means in a configuration with the adhesive facing the electromagnet and substrate;
• and
• means for electrically pulsing the electromagnet to produce a magnetic force, such that the electromagnet deposits the markers on the substrate such that the adhesive on the markers retains the markers on the substrate .