Patent ID: 9073714
Filing Date: 2015-07-07
Classification: B65H

Abstract:
1. An image forming apparatus comprising: a body provided at an inner side thereof with a printing medium transportation path, along which a printing medium is transported; a printing medium storage unit configured to store the printing medium; and a pick-up unit disposed at one side of an upper portion of the printing medium storage unit and configured to pick up the printing medium in the printing medium storage unit and to transport the picked-up printing medium to the printing medium transportation path, wherein the pick-up unit comprises a pick-up roller to pick up the printing medium in the printing medium storage unit and a forward roller to guide the picked-up printing medium to the printing medium transportation path and a pick-up housing to support the pick-up roller and the forward roller such that the pick-up housing rotates with respect to the forward roller to cause the pick-up roller and the forward roller to be biased toward the printing medium in the printing medium storage unit, and wherein the body comprises a guide portion slantingly extending from a lower side of the forward roller toward an upstream side of the forward roller so as to guide the picked-up printing medium, and a plurality of locking protrusions protruding from the guide portion to prevent a number of the printing media from being simultaneously entered into a gap between the forward roller and the guide portion, wherein the guide portion comprises a surface having one or more protrusions and one or more sub-protrusions to guide the picked-up printing media, and wherein the one or more protrusions are higher than the one or more sub-protrusions.