Patent ID: 7594656

Claim:
A paper feed mechanism that includes: a printing device; a first paper feed roller provided at an upstream side of the printing device, and a second paper feed roller provided at a downstream side of the printing device in a direction in which recording paper is fed during printing, wherein a plurality of projections are formed on the outer peripheries of the surface of each of the first and second paper feed rollers; a first contact roller in press contact with the first paper feed roller; and a second contact roller in press contact with the second paper feed roller, wherein traces formed by the pushing force from the projections on the first paper feed roller on the recording paper and traces formed by the pushing force from the projections of the second paper feed roller on the recording paper are displaced from each other so as not to overlap, and wherein the recording paper is fed by a pushing force from the plurality of projections on the first and second paper feed rollers into a back surface of the recording paper by a predetermined depth.