Patent ID: 8794727
Filing Date: 2014-08-05
Classification: B41J

Abstract:
1. Ink jet printing apparatus comprising a continuous belt of dielectric material, a launch mechanism to launch a sheet medium onto the surface of a section of the belt, a charge transfer arrangement for transferring electrical charge to the sheet medium as it is launched onto the belt section and to induce charge of opposite polarity on the reverse surface of the belt section, whereby the sheet medium is held on the belt section by a combination of the weight of the sheet medium and electrostatic attraction between the sheet medium and the belt section, a drive for driving the belt section with the sheet medium held thereon in a generally horizontal transport direction past ink jet print heads spaced from one another in the transport direction, the print heads arranged for printing downwardly onto the sheet medium supported on the belt section, a tracking sub-system for tracking movement of the belt, and a control module to coordinate operation of the print heads with the tracked movement of the belt whereby, in a single pass of the belt section past the print heads, to obtain a combined image comprising a first partial image printed by a first print head in registration with a second partial image printed by a second print head.