Abstract: A unit for applying opening devices to a web of packaging material at predetermined areas of the web arranged at a non-zero distance from one another along the web; the unit comprises a feeding group configured for feeding the web along an advancing path; at least one first tool, arranged at a first desired position along the path and configured to apply a first opening device to a corresponding first predetermined area arranged at the first desired position; and at least one second tool, arranged at a second desired position along the path and configured to apply a second opening device to a corresponding second predetermined area arranged at the second desired position; and a buffer portion arranged along the path, downstream of the second tool and upstream of the first tool, and configured to include and/or accumulate a web portion having a number of predetermined areas which is an integer multiple of the number of tools of the unit.

Abstract: A device for feeding a web of a packaging material along a path and towards an application station; wherein the packaging material comprises a plurality of pre-laminated holes at which application station applies respective opening devices. The device comprises an advancing mechanism for advancing the web along a first direction parallel to path; a sensor for generating a plurality of measure signals associated to the positions of pre-laminated holes; and a first motor controllable on the basis of measure signals. The first motor is operatively connected to the advancing mechanism for moving the advancing mechanism along a second direction transversal to path.

Abstract: A device for feeding a web of a packaging material along a path and towards an application station; wherein the packaging material comprises a plurality of pre-laminated holes at which application station applies respective opening devices. The device comprises an advancing mechanism for advancing the web along a first direction parallel to path; a sensor for generating a plurality of measure signals associated to the positions of pre-laminated holes; and a first motor controllable on the basis of measure signals. The first motor is operatively connected to the advancing mechanism for moving the advancing mechanism along a second direction transversal to path.