A tube marking device includes a delivery unit having operating rollers for delivering a tube. A thermal press printing unit includes a first heating device and a press printing roller which are actuated by a first lift cylinder to move vertically. A first transmission printing sheet is mounted to a first rotary disc, carries a plurality of marks thereon, and is moved by an operating unit. Two adjacent marks are continuous to each other or have a spacing therebetween smaller than 50 cm. A control unit is electrically connected to the delivery unit, the thermal press printing unit, the first rotary disc, and the operating unit. The delivery unit and the operating unit respectively move the tube and the first transmission printing sheet. The thermal press printing unit transmissions the plurality of marks of the first transmission printing sheet onto an outer periphery of the tube.

A tube marking device includes a delivery unit having operating rollers for delivering a tube. A thermal press printing unit includes a first heating device and a press printing roller which are actuated by a first lift cylinder to move vertically. A first transmission printing sheet is mounted to a first rotary disc, carries a plurality of marks thereon, and is moved by an operating unit. Two adjacent marks are continuous to each other or have a spacing therebetween smaller than 50 cm. A control unit is electrically connected to the delivery unit, the thermal press printing unit, the first rotary disc, and the operating unit. The delivery unit and the operating unit respectively move the tube and the first transmission printing sheet. The thermal press printing unit transmissions the plurality of marks of the first transmission printing sheet onto an outer periphery of the tube.

The automatic heat transfer machine includes a base, an upright post and a heat transfer mechanism. The machine is rotatably connected to the base through the upright post, so that the machine can adjust. The machine comprises a shell, a driving motor, a screw, a nut, a connecting component and a heat transfer plate. The shell is provided with a space, and the driving motor, the screw, the nut and the connecting component are all installed in the space. The driving motor drives the screw to rotate. The screw is connected to the nut to change the rotary motion of the screw into the linear motion of the nut. The nut is connected to the heat transfer plate through the connecting component to drive the heat transfer plate to lift. Moreover, in use, the driving motor generates less noise, thereby improving the user experience.