Patent ID: 6785508
Filing Date: 2004-08-31
Classification: G03G

Abstract:
A duplex printing apparatus having a developing unit forming an image on paper being conveyed, a settling unit fixing the image on the paper, and a discharging roller selectively conveying the paper with the fixed image in an alternate direction, comprising:a feed frame disposed such that a first side of the feed frame faces the developing unit to guide the paper, which is newly picked up or reversed from the discharge roller, to the developing unit; a back plate disposed on a second side of the feed frame to guide the paper reversed from the discharging unit for a duplex printing operation; a duplex unit including a guide frame having a curved surface disposed opposite the settling unit guiding the paper, which is passed through the settling unit and reversed from the discharging unit, between the second side of the feed frame and the back plate; and a feeding roller module comprising a feeding roller disposed on a lower portion of the feed frame to convey both the paper fed for a single-side printing operation and the reversed paper for the duplex printing operation toward the developing unit, and a plurality of paper feeding paths guiding the paper therealong to the feeding roller.