* These systems come in a pneumatic version and require air compressors. Thanks to this feature the operator can program the machine to work with an automatic cycle. This will allow the operator to feed the machine while the sealing bar goes up and down as programmed (ie every 2secs, 3secs, etc.). If the operator does not wish to use this feature, they must use the foot pedal to activate the sealing bar. Either way the operator will have his hands free to work easily to feed the machine.