The usual blister packaging machine adopts a utility model because the steel box and the steel letter are heated to a certain temperature during printing, and then the cylinder movement is used to drive the steel letter to impact the ribbon, and the steel letter characters are printed on the printed object. Increased the degree of adhesion between the ribbon ink and the printed object. At the same time, the colored ink can be used in brighter colors to distinguish the background color of the printed object, even if the background color of the printed object is light or has reflective properties.

Furthermore, the blister packaging machine is equipped with an overrunning clutch to help the ribbon not to be printed repeatedly. The nature of the overrunning clutch is that its inner shaft and outer shaft rotate in one direction. When the cylinder moves back (in the opposite direction to the impact ribbon), it drives the steel box to move back, and the thimble is set on it. The touch lever, the lever and the outer shaft of the overrunning clutch are fixedly connected, so it drives the outer shaft to rotate, and the outer shaft drives the inner shaft to rotate. Because the inner shaft is wrapped with a ribbon, the inner shaft draws the ribbon over a certain distance; When the cylinder moves forward (in the direction of the ribbon impact), the lever is rotated in the reverse direction by the spring force, and the outer shaft of the overrunning clutch also rotates in the reverse direction. The ribbon is pulled in reverse.

Therefore, as long as the cylinder stroke of the blister packaging machine is controlled to a certain displacement, the ribbon will also be pulled over a fixed distance, and there will be no repeated printing of the ribbon, ensuring clear writing and strong color.