Device for controlling sealing in wrapping machine

Abstract From the Canadian patent

A device for controlling the sealing of wrapping formed of thermoplastic material, particularly on machines that overwrap packages, for example, cigarette packages or the like wherein, at all the speed levels of the wrapping machine the, time devoted to each sealing operation is kept constant by a plurality of mechanical controls, the number of which correspond to the number of speed levels of the machine the controls oper-, ating individually at any one of the speed levels. The device includes sealing contrivances that operate at one or more stations provided along the wrapping line of the machine such sealing, contrivances being connected to operating means that terminate at one single …