CARTON PRINTING
Loosen the mounting column clamping bolt (Figure 43) and position the printer to the required height for printing. Swing the printer into position so that the print drum will lightly contact the side of the cartons as they emerge from between the guide rails. Check the print drum contact with the cartons while the conveyor is under power and adjust the print drum position to obtain approximately 1/4" - 3/8" deflection (Figure 44).
MOUNTING COLUMN |
CLAMPING SCREW |
FIGURE 43
PIVOT POINT |
ADJUST FOR |
1/4” TO 3/8” |
DEFLECTION |
PIVOT POINT |
FIGURE 44
DIE POSITIONING FOR INDEXING APPLICATIONS
TRANSFER ROLL
LEADING EDGE OF DIE
LEADING EDGE
OF CARTON
FIGURE 45
Figure 45 illustrates the best die position for carton printing when using extremely fast drying inks. Note that the leading edge of the printing die should be positioned rotationally upstream of the transfer roll. When the leading edge of the carton contacts the print drum, the drum begins to rotate in a clockwise direction. The die travels a short distance and then contacts the transfer roll where ink is applied to the die face. When the die contacts the carton the mark is applied. The print drum will continue to rotate until the trailing edge of the carton passes the coder, then the print drum will automatically return to the same starting position.
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