Patent ID: 7794078
Filing Date: 2010-09-14
Classification: B41J

Abstract:
1. A method of printing a substrate using an inkjet printer which includes a holder for rotatably receiving a roll on which the substrate is wound, a downstream print zone and an inkjet printhead for printing the substrate in the print zone, a first motor controlled transport means and a second motor controlled transport means, the first motor controlled transport means being for engaging and transporting the substrate to the second motor controlled transport means, the second motor controlled transport means being for engaging and transporting the substrate to the print zone, and a guide element disposed between the first and second motor controlled transport means, the guide element having rotational possibilities perpendicular to its axial direction to guide the substrate, said method comprising the steps of successively: performing a first transport of the substrate in the direction of the print zone over a predetermined distance while controlling the first and second motor controlled transport means in such a way that the guide element is moved from a first position which said element occupies prior to the transport, to a second position such that the distance over which the substrate extends between the first and second motor controlled transport means is smaller as a result of said transport; printing a strip of the substrate in the print zone by controlling the inkjet printhead; and performing a second transport of the substrate in the direction of the print zone over a predetermined distance while controlling the first and second motor controlled transport means in such a way that the guide element is moved from the second position to the first position; wherein an amount of the substrate is unwound from the roll that is sufficient to perform these steps without further unwinding of the roll.