Patent ID: 8231121

Claim:
A paper tray of a printer, comprising: a paper tray body; a slide shaft, connected to the paper tray body; a first pick arm, having a first pick roller, pivotally connected to the slide shaft, and the first pick roller in the first pick arm being rotated along with the slide shaft; a second pick arm, having a second paper roller, slidely and pivotally disposed on the slide shaft, and the second pick roller in the second pick arm being rotated along with the slide shaft; and a paper width guide, disposed on the paper tray body, and connected to the second pick arm through a linkage device to drive the second pick arm, wherein the linkage device comprises: a pulley set, having a plurality of pulleys disposed in the paper tray body; and a linkage cable, disposed on the pulleys and fixed on the paper width guide and the second pick arm, and the paper width guide driving the second pick arm to slide along the slide shaft through the linkage cable.