Patent ID: 6318854
Filing Date: 2001-11-20
Classification: B41J

Abstract:
An inkjet printing apparatus which moves a media sheet along a media path and marks the media sheet with ink, comprising:an inkjet printhead having a plurality of inkjet nozzles which eject ink onto a portion of the media sheet located within a print zone, the print zone located adjacent to the plurality of nozzles;a support which supports the media sheet as the media sheet passes along the media path through the print zone;a roller located upstream along the media path prior to the print zone, the roller stabilizing the media sheet relative to a first surface during printing onto at least a first portion of the media sheet;a guide shim located along the media path, the guide shim having a guide surface extending at least from the roller, beyond the roller toward the print zone during printing, the guide shim acting upon a portion of the media sheet between the roller and the print zone to keep the media sheet out of contact with the printhead; andmeans for advancing the guide shim along the media path toward the print zone during printing to at least a third portion of the media sheet, in which the advancing means comprises means for advancing the guide shim while a trailing edge of the media sheet moves into the print zone; andhaving a minimum media sheet page margin corresponding to a distance from inkjet nozzles located furthest from an edge of the guide shim to an area of the guide shim located adjacent to a distal edge of the guide shim while the guide shim is in an advanced position.