Tetra Laval Holdings & Finance S.a.

Claudio Ferrari

Roberto De Pietri Tonelli

Stefano Costa

Paolo Sanibondi

Nicola Macini

Filippo Ferrarini

Richard John Pedretti

Antonio Melandri

Nicola Garuti

Fabio Bassissi

Giorgio Galavotti

Marco Melandri

Andreas Asper

Roberto Borsari

Paolo Bergami

Gianluca Pagliani

Bengt Rosberg

Lorenzo Martini

Roberto Panciroli

Alberto Zambonelli

Roberto De-Pietri-Tonelli

Andrea Manzini

Saquib Javed

A packaging machine includes a conveying device for advancing a packaging material web at least to a tube forming station at which the web is formed into a tube and for advancing the tube to a tube forming and sealing device to form and longitudinally seal the tube, a tensioning device to control tension of the web and/or of the tube and a control unit to control operation of the packaging machine. The tensioning device has at least one tensioning assembly having at least first and second drive rollers, a first drive motor connected to the first drive roller to rotate the first drive roller and a second drive motor connected to the second drive roller to rotate the second drive roller. The control unit controls the first and second drive motors such that a free loop of the web expands and/or advances between the first and second drive rollers.

Packaging machine and method for producing sealed packages

A packaging machine comprises a conveying device for advancing a web along a web advancement path at least to a tube forming station where the web is formed into a tube and for advancing the tube along a tube advancement path, a tube forming and sealing device configured to form and to longitudinally seal the tube, a tensioning device upstream of the tube forming station and configured to control the tension of the tube and a control unit configured to control packaging machine operation. The tensioning device comprises a main drive roller rotatable around a main rotation axis and a main drive motor configured to actuate rotation of the main drive roller around the main rotation axis. The control unit is configured to control the main drive motor such that angular speed and/or angular acceleration of the main drive roller is cyclically varied to control the tension of the tube.

There is described a packaging apparatus () for forming a plurality of sealed packages () from a tube () of a web of packaging material () which is continuously filled with a pourable product. The packaging apparatus comprises an isolation chamber () separating an inner environment () containing a sterile gas from an outer environment (). The packaging apparatus further comprises a delimiting element () arranged, in use, within the tube () and being designed to divide the tube (), in use, into a first space () and a second space (). The packaging apparatus () also comprises a pressurizing device () for pressurizing the second space () by means of a pressurized sterile gas. The delimiting element () is arranged within the isolation chamber ().

Packaging apparatus for forming sealed packages

There is described a method for forming a tube () of a web () of packaging material comprising the steps of advancing the web () of packaging material along a web advancement path (P), overlapping a first lateral edge () of the web (') of packaging material with a second lateral edge () of the web () of packaging material for obtaining a longitudinal seam portion of the tube () and fusing at least an internal outer surface () of the first lateral edge () and an external outer surface () of the second lateral edge () with one another for longitudinally sealing the seam portion of the tube (). The step of fusing comprises at least the substeps of directly heating the external outer surface () of the second lateral edge () and heating by contact the internal outer surface () by establishing contact between the internal outer surface () and the directly heated external outer surface ().

Method for forming a tube and a method and a packaging machine for forming a package

A packaging machine for producing sealed packages from a web of packaging material having a surface of uneven thickness comprises a pressure roller to press the surface against a corresponding forming roller for sealing the package. The pressure roller comprises an elastically deformable body; and a core of greater rigidity housed therein, with the core comprising a first end surface cooperating with the body, and a radially inner second end surface. The core includes a first portion and a second portion, with the radial distance between the first and second surface at the first portion being greater than at the second portion.

Packaging machine

A device for controlling a twist of a tube of packaging material in relation to an apparatus for transverse sealing of the tube comprises a number of rollers forming an aperture through which the packaging material is arranged to pass. A roller surface of each of the rollers is arranged to be in contact with an outer surface of the tube. The direction of the rotation axis of at least one of the rollers is adjustable to control the twist of the tube. A method for controlling a twist of a tube of packaging material comprises allowing the packaging material to pass through an aperture formed by a number of rollers with a rolling surface in contact with an outer surface of the tube, and adjusting the direction of the rotation axis of at least one of the rollers to control the twist of the tube.

Device and a method for controlling a twist of a tube

An induction sealing device which may be used for producing packages of pourable food products by transversely sealing a tube of sheet packaging material having at least one layer of induction heatable material covered with plastic material. The sealing device has: a generator for generating an alternating power signal; an inductor receiving the alternating power signal to induce a parasitic electric current in the layer and locally melt the plastic material to form a transverse seal; and a matching circuit for achieving optimum power transfer between the generator and the inductor. The matching circuit includes an inductive-capacitive circuit, in which the capacitance of a variable capacitance capacitive element is adjustable so that the current-voltage phase angle is close to zero.

Induction sealing device and method which may be used for producing packages of pourable food products

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Fiorano Modenese, Italy

Claudio Ferrari