Patent ID: 9050835
Filing Date: 2015-06-09
Classification: B41J

Abstract:
1. A method for printing on a movable print medium in a printing system, including: providing a first linehead defining one or more print zones, the first linehead adapted to jet liquid onto a first side of the movable print medium in the one or more print zones; providing one or more vacuum transport rollers having a porous sleeve rotatable around a non-rotating core, wherein the rotatable porous sleeve is engaged by the movable print medium that exerts a force on the porous sleeve causing it to rotate, and wherein at least one vacuum transport roller is disposed adjacent to a second side of the movable print medium and opposite the first linehead, and is aligned with one of the one or more print zones of the first linehead, and wherein the core includes a first vacuum manifold that outputs a first vacuum force that operates on the second side of the movable print medium through the porous sleeve; providing at least one transport roller that is not aligned with any of the print zones, the non-aligned transport roller being proximate to a second vacuum manifold that produces a second vacuum force to deflect the movable print medium thereby causing an increase in the wrap angle of the movable print medium around the non-aligned transport roller and reducing the formation of a wrinkle in the movable print medium; moving the movable print medium through the printing system; applying the vacuum tome proximate to the second side of the movable print medium such that at least a portion of the movable print medium is deflected causing an increase in a wrap angle of the movable print medium around the vacuum transport roller(s); and jetting liquid from the first linehead onto the first side of the movable print medium to form a print.