Abstract: A method includes advancing, by a controller device comprising a processing resource, a media from a roll into a printer via rollers before a printing process begins, wherein a leading edge of the media comprises a curl due to the roll. The method also includes guiding, by the controller device, the media through the printer to engage a substrate in a predetermined zone spaced downstream a predetermined distance from a roller pinch point. The method also includes holding, by the controller device, the media against the substrate in the predetermined zone to force the leading edge of the media to bend in a direction opposite the curl of the leading edge to counteract the curl of the leading edge.

Abstract: A printer mechanism includes a printhead to print on a print medium, and a platen located generally adjacent the printhead such that the platen and the printhead define a print zone therebetween. The platen includes a plurality of elongate ribs that project from an upper surface of the platen in a spaced relationship and positioned to contact a lower surface of the print medium such that the print medium bends downwardly between the ribs to provide an undulated section of the print medium with hills and valleys in the print zone. At least one shape control mechanism transforms each of the hills in the print zone into a corresponding valley in an output path adjacent to the print zone and transforms each of the valleys in the print zone into a corresponding hill in the output path.

Abstract: A method includes advancing, by a controller device comprising a processing resource, a media from a roll into a printer via rollers before a printing process begins, wherein a leading edge of the media comprises a curl due to the roll. The method also includes guiding, by the controller device, the media through the printer to engage a substrate in a predetermined zone spaced downstream a predetermined distance from a roller pinch point. The method also includes holding, by the controller device, the media against the substrate in the predetermined zone to force the leading edge of the media to bend in a direction opposite the curl of the leading edge to counteract the curl of the leading edge.

Abstract: A system includes a controller to adjust the speed and feed direction in which media is guided through a printer. A park control module commands the controller to guide a leading edge of the media to engage a park zone in the printer. The park zone includes a surface of a platen in the printer that is spaced a predetermined distance from a roller pinch point in the printer where the leading edge of the media is to engage the platen to mitigate roll curl in the media.

Abstract: Medium engaging members are rotatable about an axle. In one embodiment, the members have filed hubs asymmetrically extending towards one another. In another embodiment, the members have centers of mass such that the members lean into abutment with one another.

Abstract: Various apparatus and method relating to medium engaging members are disclosed.