Knob and lid feeding is done manually by the operator, while screw feeding as well as screwing is done automatically as soon as the operator has positioned the two pieces and had left risk zone. When the operation is finished the operator will remove the lid and will reefed the machine with new pieces. A special survey system will avoid any waste operating cycle.

A special structure aloud to use the machine with varied lid shapes. The operator can easily pass to a different lid by changing some containing rings where lids are positioned.

Appropriate protections and safety devices warrant the health of the operator, since he wont be able to approach the knobing machine during operative period as per Community Directives in force.