This unit is made up by a pair of  sealing bars and a control box . It can be custom made in order to be adapted to any special machine including a sealing unit. 

The sealing bars can be made of different lengths and use different types of sealing wires. The control box includes a transformer and two separate timers in order to set both the sealing and coolong times. It is also prepared to receive an input signal to start the sealing and send back an output signal at the end of the cycle.