Method for printing with digital printing press having automated media transport
View Patent ↗A digital printer is provided with an automated printing sheet transport system, operating in an intermittent manner of feeding a printing sheet to the digital printer, halting the transport to allow printing onto the printing sheet while the printing sheet is maintained in a fixed position, and removing the printed sheet from the digital printer after printing. The digital printer may be combined with a screen print station, both operating on top of a single printing sheet transport system, to form an integrated multifunctional and hybrid printing press.
1. A method for printing comprising the steps of:
feeding a printing sheet in a first transport direction to a digital print station using a first printing sheet transport system;
raising a print table to a printing position to receive the printing sheet thereon;
digital printing a first ink on the printing sheet in the digital print station while the printing sheet is maintained in a fixed position on the print table;
lowering the print table to a sheet transport position;
removing the printing sheet in the first transport direction from the digital print station using the first printing sheet transport system; wherein
the method further includes the steps of:
releasing the printing sheet from the first transport system before the digital printing; and
taking hold of the printing sheet again using the first printing sheet transport system after the digital printing; wherein
the first sheet transport system includes a gripper.
2. The method according to claim 1 , further comprising the steps of:
feeding the printing sheet to a screen print station;
screen printing a second ink on the printing sheet in the screen print station, the screen printing being performed prior to or after the digital printing on the printing sheet;
removing the printing sheet from the screen print station; wherein
the steps of feeding and removing the printing sheet to and from the screen print station are automated using a second printing sheet transport system and occur in a second transport direction.
3. The method according to claim 2 , wherein the steps of feeding and removing the printing sheet to and from each of the print stations are synchronized with a printing sheet feed cycle.
4. The method according to claim 1 , wherein the step of digital printing includes reciprocating a shuttle having a printhead for printing the first ink on the printing sheet in a fast scan direction across the printing sheet.
5. The method according to claim 4 , wherein the fast scan direction is substantially perpendicular to the first transport direction.
6. The method according to claim 1 , wherein the step of digital printing the first ink on the printing sheet includes jetting the first ink using an ink jet printhead.
7. The method according to claim 1 , further comprising the step of:
aligning the printing sheet in the digital print station using the gripper as a reference.
8. The method according to claim 1 , further comprising the step of:
withdrawing the gripper from the digital print station before the digital printing.