Patent ID: 7706738
Filing Date: 2010-04-27
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a developing device to develop an image on a print paper; a fusing device to fuse the image on the print paper, the fusing device having a heating roller and a pressing roller engaged with each other; and a paper discharge device to receive the printing paper having the fused image from the fusing device and discharge the paper to an exterior of the image forming apparatus, the paper discharging device having a plurality of paper discharge rollers arranged in a direction perpendicular to a paper discharging direction and a plurality of idle rollers facing the plurality of paper discharge rollers to discharge the print paper between the plurality of paper discharge rollers and the plurality of idle rollers; wherein the plurality of paper discharge rollers have non-uniform diameter portions extending in a longitudinal direction and an internal end of each of the plurality of paper discharge rollers is larger than its opposing external end such that at a nip between each paper discharge roller and its corresponding idle roller, a velocity at the internal end is larger than a velocity at the external end and the print paper bends according to the non-uniform diameter portion of the paper discharge roller as the paper is discharged by the paper discharge device.