Media unit redirector assembly for media processing devices

1. A registration assembly for a media processing device, comprising:

a registration surface substantially parallel with a direction of travel of a media unit along a media processing path defined within a housing of the media processing device;

a bias member coupled between the housing and the registration surface to bias the registration surface toward the media processing path to apply a force to an edge of the media unit when in an active position; and

an activator coupled to a roller, the roller to be driven via contact with the media unit, the roller to rotate in a first rotational direction in response to the media unit moving in a first linear direction, the roller to rotate in a second rotational direction opposite the first rotational direction in response to the media unit moving in a second linear direction opposite the first linear direction, the activator configured to:

(i) move the registration surface toward the media processing path into the active position to engage the media unit responsive to rotation of the roller in the first rotational direction; and

(ii) move the registration surface away from the media processing path into an inactive position responsive to rotation of the roller in the second rotational direction.

2. The registration assembly of claim 1 , further comprising a wall extending between a first stop and a second stop at an angle relative to the media processing path.

3. The registration assembly of claim 2 , wherein the activator comprises a post configured to travel along the wall between the first and second stops responsive to rotation of the roller.

4. The registration assembly of claim 3 , wherein the post extends radially from a disc frictionally engaged with the roller.

5. The registration assembly of claim 3 , further comprising a cage fixed to the registration surface, the cage including the first stop and the second stop.

6. The registration assembly of claim 5 , wherein the post extends into the cage.

7. The registration assembly of claim 2 , wherein the post is configured to remain stationary relative to the roller when the post contacts the first stop or the second stop.

8. The registration assembly of claim 1 , wherein the media unit is a card.

9. A method for registering a card within a media processing path, the method comprising:

driving a media unit in a first linear direction along a roller, thereby rotating the roller in a first rotational direction;

moving a registration assembly towards the media processing path, via a biasing member, in response to the roller rotating in the first rotational direction, wherein the moving of the registration assembly forces the media unit against a border opposite the media unit from the registration assembly;

driving the media unit in a second linear direction along the roller, thereby rotating the roller in a second rotational direction, the second linear direction being opposite the first linear direction and the second rotational direction being opposite the first rotational direction; and

moving the registration assembly away from the media processing path in response to the roller rotating in the second rotational direction.

10. The method of claim 9 , wherein a post secured to the roller translates the rotation of the roller into the movement of the registration assembly.

11. The method of claim 9 , further comprising flipping the media unit.

12. The method of claim 9 , wherein moving the registration assembly comprises moving a post along a wall between stops.

13. The method of claim 12 , wherein the wall is angled relative to the media processing path.

14. The method of claim 12 , wherein the post is coupled to the roller.

15. The method of claim 9 , wherein the media unit is a card.

16. The method of claim 9 , wherein the surface is parallel to the border.