The semi automatic carton sealer can automatically adjust itself according to the box sizes. It has side-motorized driving belts at the bottom with a speed of 20 m/minute. It has two 0.18 HP motors. The safety protection doors are connected to electro-pneumatic disconnection switches. In working cycle SM48, boxes will arrive with flaps closed, touch the switch on the top frame that moves it up, the driving belts close and transport it through the machine sealing the box. In Working cycle SM481, boxes touch the switch that activate the top head frame, which comes down up to the box top. The driving belt then transports the box through the machine sealing it. The top and bottom taping heads K12 are 75mm in width.