Patent ID: 7690636

Claim:
A finishing apparatus in a copying machine comprising: a jogging assembly aligning papers in left and right directions; a paper contact plate; a paper pushing device adjacent to the paper contact plate, the paper pushing device being structured to push the papers set in the paper contact plate to a paper stacker; a tray base in mechanical communication with a driving mechanism which moves the tray base in a direction opposite to the paper pushing device to guide alignment of a set of the papers; a recess groove provided in the tray base; and an angle adjusting unit provided in the tray base to adjust an angle of the tray base, the angle adjusting unit comprises a support roller which supports the tray base at a first angle and contacts the recess groove to adjust the tray base to a second angle, different from the first angle, wherein the tray base has one end connected with one end of a rotational link to reciprocate along the paper contact plate, and the other end of the rotational link is fixed to a fixed shaft and rotates at a predetermined angle around the fixed shaft.