Machine for wrapping groups of products in a roll and packaging process

Abstract

Described is a machine for wrapping groups () of products in a roll, comprising: a packaging unit () positioned above a feed channel (); a transfer element () configured for feeding, in a feed direction (V), to the packaging unit () the groups () of products in a roll with a corresponding sheet of wrapping material (); feed and positioning units () configured for feeding the sheet () of wrapping material inside the vertical channel (), in a direction (T) transversal to the direction (V) for feeding the group () of products; the machine also comprises means () for controlled retaining and unwinding of the sheet () of wrapping material positioned along the vertical feed channel (); a first movement unit () connected to the controlled retaining and unwinding means () and configured to move the controlled retaining and unwinding means () from a position of free passage of the sheet () of wrapping material to a position for bilateral retaining of the sheet () of wrapping material positioned in the channel (); a second movement unit () connected to the controlled retaining and unwinding means () and configured to move the controlled retaining and unwinding means (), located in the retaining position, so as to unwind the sheet () of wrapping material in a controlled manner and at the movement of the transfer element () from the first lower operating position to a second upper operating position.