Media transport

Abstract

A media transport includes a feed roller to be rotated in a first direction, and an input/output roller to be rotated in the first direction to direct media into a media path with rotation of the feed roller in the first direction, where the feed roller is to be rotated in a second direction opposite the first direction to advance the media within the media path and, with the rotation of the feed roller in the second direction, the input/output roller is to be temporarily decoupled from rotation with the feed roller.

1 . A media transport assembly, comprising:
 a feed roller to be rotated in a first direction; and   an input/output roller to be rotated in the first direction to direct media into a media path with rotation of the feed roller in the first direction,   the feed roller to be rotated in a second direction opposite the first direction to advance the media within the media path, and   with the rotation of the feed roller in the second direction, the input/output roller to be temporarily decoupled from rotation with the feed roller.   
     
     
         2 . The media transport assembly of  claim 1 , with the input/output roller temporarily decoupled from the rotation with the feed roller, a trailing portion of the media to be supported by the input/output roller. 
     
     
         3 . The media transport assembly of  claim 1 , with the input/output roller temporarily decoupled from the rotation with the feed roller, a leading portion of the media to be advanced in the second direction with the feed roller. 
     
     
         4 . The media transport assembly of  claim 1 , with further rotation of the feed roller in the second direction, the input/output roller to be rotated in the second direction with rotation of the feed roller in the second direction. 
     
     
         5 . The media transport assembly of  claim 1 , further comprising:
 a transmission to transfer rotational power to the feed roller and the input/output roller, the transmission including a delay clutch to temporarily decouple the rotation of the input/output roller from the rotation with the feed roller.   
     
     
         6 . A media transport assembly, comprising:
 a media path to route media to a print zone;   an input/output roller at an end of the media path to direct media into and out of the media path;   a feed roller to advance media within the media path; and   a transmission to rotate the input/output roller with rotation of the feed roller, the transmission including a delay clutch to temporarily decouple rotation of the input/output roller from rotation of the feed roller based on a direction of rotation of the feed roller.   
     
     
         7 . The media transport assembly of  claim 6 , wherein the transmission is to rotate the input/output roller in a first direction with rotation of the feed roller in the first direction, and rotate the input/output roller in a second direction opposite the first direction with rotation of the feed roller in the second direction after a delay of the delay clutch. 
     
     
         8 . The media transport assembly of  claim 6 , wherein, with the input/output roller temporarily decoupled from rotation of the feed roller,
 a trailing portion of the media is to be at the input/output roller,   the input/output roller is free to rotate in a first direction, and   a leading portion of the media is to be advanced by the feed roller in a second direction opposite the first direction.   
     
     
         9 . The media transport assembly of  claim 6 , wherein the delay clutch includes a first delay gear, a second delay gear, and a delay disc interposed between the first delay gear and the second delay gear, the delay disc to temporarily decouple rotation of the second delay gear from rotation of the first delay gear based on a direction and amount of rotation of the first delay gear,
 wherein the transmission includes a first drive gear to drive the feed roller and the first delay gear, and a second drive gear to be driven by the second delay gear and drive the input/output roller.   
     
     
         10 . A media transport method, comprising:
 rotating a feed roller in a first direction;   coupling rotation of an input/output roller with the rotating the feed roller in the first direction to direct media into a media path; and   rotating the feed roller in a second direction opposite the first direction to advance the media within the media path, including temporarily decoupling rotation of the input/output roller from the rotating with the feed roller.   
     
     
         11 . The method of  claim 10 , further comprising:
 further rotating the feed roller in the second direction opposite the first direction to further advance the media within the media path, including re-coupling rotation of the input/output roller with the rotating of the feed roller.   
     
     
         12 . The method of  claim 10 , further comprising:
 supporting a trailing portion of the media at the input/output roller during the temporarily decoupling of rotation of the input/output roller.   
     
     
         13 . The method of  claim 10 , further comprising:
 advancing a leading portion of the media in the second direction with the feed roller during the temporarily decoupling of rotation of the input/output roller.   
     
     
         14 . The method of  claim 10 , wherein temporarily decoupling rotation of the input/output roller from the rotating with the feed roller includes temporarily decoupling rotation of the input/output roller from the rotating of the feed roller with a delay clutch in a power transmission path between a first gear driving the feed roller and a second gear driving the input/output roller. 
     
     
         15 . The method of  claim 14 , wherein temporarily decoupling rotation of the input/output roller from the rotating with the feed roller with the delay clutch includes temporarily decoupling rotation of a second delay gear from rotation of a first delay gear with a delay disc interposed between the first delay gear and the second delay gear.