Abstract: A clamp mechanism for fixing a printing medium is disclosed in the present invention. The clamp mechanism includes a base, a drum pivotably disposed on the base, a frame disposed on the drum, a clamping component movably disposed on the frame for clamping an end of the printing medium with the drum, and a resilient component disposed between the frame and the clamping component for pressing the clamping component on a surface of the drum so as to clamp the end of the printing medium.

Abstract: A printing device includes a print head, a paper roll, a first paper path, a second paper path, a third paper path, a cutting mechanism and a fourth paper path. The paper roll is for rolling a printing media. The first paper path has a first end and a second end, and the first end is connected to the paper roll. The second paper path is connected to the second end and oriented reverse to the first paper path for being connected to the print head. The third paper path extends from the second end. The cutting mechanism is disposed on the third paper path and for cutting the printing media into a media sheet. The fourth paper path connects the third paper path and the second paper path.

Abstract: A clamp mechanism for fixing a printing medium is disclosed in the present invention. The clamp mechanism includes a base, a drum pivotably disposed on the base, a frame disposed on the drum, a clamping component movably disposed on the frame for clamping an end of the printing medium with the drum, and a resilient component disposed between the frame and the clamping component for pressing the clamping component on a surface of the drum so as to clamp the end of the printing medium.

Abstract: A printer includes a shell, a reversion module, a stick, a roller set, a first sensor, a second sensor, a first motor, and a second motor. The reversion module includes a housing, a first axis, a first gear, a second axis, a second gear, and a plurality of cannelures. The printer feeds a printing media into the reversion module, and drives the rotation of the reversion module to drive the rotation of the printing media so that both sides of the printing media are capable of being printed by the printer. The effect of reversible print without additional reversion of the printing media by bare hands is achieved.