| 摘要 |
A machine for sealing vacuum packs, include a pump for aspirating air from inside a pack; an electric motor, the electric motor is powered by an electricity grid supply; at least a welding element that is placed in contact with the pack, for welding and sealing the pack; a supply circuit configured to connect the welding element to the electricity grid supply; a control unit that controls the supply circuit to supply energy to the welding element; and a measuring device for measuring a value of a parameter indicating the electrical energy supplied to the welding element. The measuring device is connected to the control unit, which is configured to determine the value of electrical energy supplied to the welding element from the start of the welding, and interrupts supply of the electrical energy to the welding element on reaching a predetermined value of the electrical energy. |
