Portable printer

1. A media processing device adapted to print to a media having opposite ends, the media adapted to transition from a laterally strong condition to a laterally weak condition, the media processing device comprising:

a housing defining a media receiving area configured to receive the media;

a first media support arm extending from the housing proximate the media receiving area for engaging a first end of the media, wherein the first media support arm is to slidably translate along the housing and to provide a holding force to the first side of the media, wherein the first media support arm includes a first locking element;

a media cover configured to move between a closed position and an open position, the media cover including a second locking element,

wherein the first locking element of the first media support arm is configured to engage the second locking element of the media cover when the media cover is in the closed position.

2. The media processing device of claim 1 , further comprising a pocket within the first media support arm, wherein the first locking element is movable within the pocket.

3. The media processing device of claim 2 , wherein the first locking element includes a retainer to hold the first locking element in the pocket.

4. The media processing device of claim 1 , further comprising a spring to bias the first locking element towards engagement with the second locking element when the media cover is in the closed position.

5. The media processing device of claim 4 , wherein biasing the first locking element towards engagement with the second locking element includes moving a portion of the first locking element outside a pocket of the first media support arm.

6. The media processing device of claim 1 , wherein the first locking element includes a spring configured to move the first locking element into engagement with the second locking element when the media cover is in the closed position, thereby stabilizing the first media support arm during a printing operation.

7. The media processing device of claim 1 , wherein the first locking element includes a pivot, and the first media support arm includes an aperture to receive the pivot.

8. The media processing device of claim 7 , wherein the first locking element rotates about the pivot and within a pocket of the first media support arm.

9. The media processing device of claim 1 , wherein the second locking element is configured to slope towards a center of the second locking element.

10. The media processing device of claim 1 , wherein the first locking element includes first and second protrusions at a distal end of the first locking element.

11. The media processing device of claim 10 , further comprising a groove between the first and second protrusions.

12. The media processing device of claim 11 , wherein the second locking element is configured to engage the groove.

13. The media processing device of claim 1 , wherein the first locking element is configured to disengage the second locking element when the media cover is moved to the open position.

14. The media processing device of claim 1 , further comprising a second media support arm extending from the housing proximate the media receiving area for engaging a second end of the media, the second media support arm, wherein the second media support arm is biased to slidably translate along the housing to provide a holding force to the second side of the media, wherein the second media support arm includes a third locking element.

15. The media processing device of claim 14 , wherein the media cover includes a fourth locking element configured to engage the third locking element when the media cover is in the closed position.

16. The media processing device of claim 14 , wherein the second media support arm includes a pocket, the third locking element configured to be inserted into the pocket.