Abstract: A machine for forming filter bags for infusion products starting from pieces of filter material each containing a dose of infusion product and having, the pieces, a corresponding longitudinal axis of extension, including a carousel rotating about a main axis of rotation and including gripping elements movable in rotation about the main axis along a closed circular trajectory; each gripping element configured to receive and retain a piece of filter material along an operating path; an operating station configured to perform an operation on the piece of filter material retained by a corresponding gripping element; each gripping element including an articulation device configured for obtaining a further rotation about a secondary axis of rotation, transversal to the main axis of rotation, to rotate and position the corresponding piece of filter material with its longitudinal axis of extension parallel to the main axis of rotation at the operating station.

Abstract: A machine for making filter bags for infusion products includes a first carousel for continuous rotary movement about a first axis and having first operating stations movable therewith, each first operating station configured to operate on a corresponding piece of filter material fed along an angular stretch of the first carousel, to lift two chambers to a position side by side. A second carousel positioned alongside the first carousel and rotating continuously about a second axis parallel to the first axis has a plurality of joining elements positioned along, and continuously movable with, the second carousel. Each joining element is connected to corresponding control devices for actuating, in a synchronized fashion, a succession of movements of the joining element to intercept free ends of erect filter material, positioned on an operating station and joining them, towards one of the two chambers containing a dose of product.

Abstract: A machine for making filter bags for infusion products includes a first carousel for continuous rotary movement about a first axis and having first operating stations movable therewith, each first operating station configured to operate on a corresponding piece of filter material fed along an angular stretch of the first carousel, to lift two chambers to a position side by side. A second carousel positioned alongside the first carousel and rotating continuously about a second axis parallel to the first axis has a plurality of joining elements positioned along, and continuously movable with, the second carousel. Each joining element is connected to corresponding control devices for actuating, in a synchronized fashion, a succession of movements of the joining element to intercept free ends of erect filter material, positioned on an operating station and joining them, towards one of the two chambers containing a dose of product.

Abstract: A method for reel changing in automatic machines including: preparing a carriage having a robotic arm including a gripped with a gripper at its free end for retaining a reel; the carriage has a support for the reel and a container for collecting cores of empty reels; positioning the reel on the support defining a predetermined position and memorised by the arm; moving the carriage forward toward a rotating shaft in a position allowing movement of the arm towards the shaft; reading a code on the shaft by a reading device on the arm; sending a signal by the reading device corresponding to the reading of the code to a processing unit with memorisation of the position of the shaft; picking up of an empty core from the rotating shaft and releasing the core in the container; picking up the reel; inserting the reel in the rotating shaft.

Abstract: A device for joining filter bags includes two operating units located on opposite sides of a continuous tubular strip of filter material movable along a feed direction; each operating unit includes a supporting body, a sealing head connected to the supporting body and two kinematic units equipped with a corresponding eccentric rotary system for moving the supporting body along a first trajectory and to move the sealing head between a position of contact with the strip and a position away from the strip; each operating unit includes a carriage associated with the sealing head for and slidably connected to the supporting body to translate in both directions along a second trajectory.

Abstract: A machine for forming filter bags for infusion products starting from pieces of filter material each containing a dose of infusion product and having, the pieces, a corresponding longitudinal axis of extension, including a carousel rotating about a main axis of rotation and including gripping elements movable in rotation about the main axis along a closed circular trajectory; each gripping element configured to receive and retain a piece of filter material along an operating path; an operating station configured to perform an operation on the piece of filter material retained by a corresponding gripping element; each gripping element including an articulation device configured for obtaining a further rotation about a secondary axis of rotation, transversal to the main axis of rotation, to rotate and position the corresponding piece of filter material with its longitudinal axis of extension parallel to the main axis of rotation at the operating station.

Abstract: A device for joining filter bags includes two operating units located on opposite sides of a continuous tubular strip of filter material movable along a feed direction; each operating unit includes a supporting body, a sealing head connected to the supporting body and two kinematic units equipped with a corresponding eccentric rotary system for moving the supporting body along a first trajectory and to move the sealing head between a position of contact with the strip and a position away from the strip; each operating unit includes a carriage associated with the sealing head for and slidably connected to the supporting body to translate in both directions along a second trajectory.