Patent ID: 8752836

Claim:
A paper delivery device comprising: a mounting shaft; a paper guide assembly comprising at least one first guide unit attached to the mounting shaft and at least one second guide unit attached to the mounting shaft; a first wheel abutting the at least one first guide unit; a second wheel abutting the at least one second guide unit; and a driving module configured to drive the first wheel and the second wheel to rotate in a first direction or a second direction that is opposite to the first direction, the driving module comprising a driving motor, a driving cap connected to the driving motor, at least one first cap connected to the first wheel, and at least one second cap connected to the second wheel; and a band surrounding the driving cap, the at least one first cap, and the at least one second cap; wherein the at least one first guide unit and the at least one second guide unit is are movable towards each other when the first wheel and the second wheel are rotated in the first direction, or movable away from each other when the first wheel and the second wheel are rotated in the second direction.