Patent ID: 7506870
Filing Date: 2009-03-24
Classification: B65H,G03G

Abstract:
1. A printing apparatus comprising: at least one media drive nip comprising a drive roller and an idler roller opposite said drive roller; a drive axle operatively connected to said drive roller, wherein said drive axle is adapted to rotate in a forward direction when moving media through said media drive nip; a drive motor operatively connected to said drive axle, wherein said drive motor is adapted to drive said drive axle in said forward direction and a reverse direction opposite said forward direction; a cam operatively connected to said idler roller, wherein as said cam rotates, said cam moves said idler roller between a first position biased against said drive roller and a second position out of contact with said drive roller; and a single-direction device operatively connected to said drive axle and said cam, wherein said single-direction device is adapted to rotate said cam only when said drive axle rotates in said reverse direction.