Feed cassette and image forming apparatus including the same

An image forming apparatus, comprising:

• a frame;
• a knock-up plate hinge-coupled to the frame at a first end of the knock-up plate, to tilt about the first end according to an amount of paper stacked thereon;
• a feed roller provided proximate to a second end of the knock-up plate, the second end being opposite the first end, to supply a paper from an uppermost stacking position of the knock-up plate;
• a tilting arm part, having a frictional surface, to contact with the supplied paper and to make a predetermined angel with the knock-up plate so as to prevent the paper from being overlappingly supplied, and to maintain an intermediate angle between the frictional surface and the knock-up plate to be within a predetermined angle range as a result of the tilting arm part being hinge-coupled to the frame and being tilted due to contact and pressure of the knock-up plate;
• and
• an elastic supporter having both sides thereof respectively coupled to the frame and the tilting arm part so as to cause the tilting arm part to remain in contact with the knock-up plate.

A feed cassette, including a frame to be attachable to an image forming apparatus, the cassette comprising:

• a plate to rotate about an attachment of the plate and the frame in accordance with an amount of paper stacked thereon, the apparatus sequentially drawing pieces of the paper thereinto;
• a tilting system, including a body biased to remain in contact with the plate during the rotation thereof and a hinge to connect the body with the frame about which the body rotates as the plate rotates;
• and
• a means for preventing a drawing of overlapping pieces of paper into the apparatus within a range of angles relative to the plate supported by the tilting system.