Tetra Laval Holdings & Finance S.a.

Tetra Pak International Ab

Deering Milliken Research Corporation

Gyula Balla

Hans Selberg

Peter Blomqvist

Tord Cedell

Bo Berlin

Ingmar Andreasson

An apparatus in the production of a package or a packaging material comprising at least one metal layer and one polymer layer, the apparatus including an inductor connectable to a high frequency current source. According to the invention, said inductor includes a core () of a ferromagnetically conductive material, the core displaying two shanks () with an air gap () between a first respective end of these shanks (), as well as an arc section () which interconnects a second respective end of the two shanks () with each other for conducting a magnetic flow () between the shanks, the arc section () displaying an electrically conductive coil () wound around same, the coil displaying connection points () for said high frequency current source ().

Apparatus in the production of a package or a packaging material

An apparatus for heat-sealing thermoplastic materials includes a sealing jaw with a groove in which a thermal strip is mechanically anchored. The flange portions of the jaw projecting on either side of the groove are compressed towards one another and toward the thermal strip to thereby anchor the thermal strip within the groove. The sealing jaw is manufactured from aluminum which has been surface anodized to create an electrically insulating layer between the body of the jaw and the thermal strip.

Apparatus for heat-sealing thermoplastic materials

An apparatus for ultrasonic sealing of thermoplastic materials includes a vibration generator of a so-called giant magnetostrictive powder composite (GMPC) which is anchored to a jaw at an anchorage point. The vibration generator is formed with a cross-sectional area which progressively reduces as seen from the anchorage point. A free end of the vibration generator has a narrow working surface. The vibration generator is surrounded by a coil for generating a magnetic field.

Apparatus for sealing by surface fusion of mutually facing surfaces of

Method of sterilizing a packaging material with a sterilizing agent in liquid form. The packaging material is discharged in order to eliminate electrostatic surface charged on the packaging material, after which the packaging material is wetted with the sterilizing agent which is applied in an electrostatically charged form to those areas of the packaging material which are to be sterilized. The packaging material with the sterilizing agent, which coalesces to a thin, homogeneous film, is finally heated to drive away the sterilizing agent from the sterilized packaging material.

Method of sterilizing a packaging material by means of a sterilizing

A sealable laminated material which consists of an outer thermoplastic layer with a lamination layer arranged adjoining the said layer containing fine-grain carbon material, so-called carbon black, and a binder. The laminated material moreover may contain a carrier layer of e.g. paper, cardboard or plastic material. The outer thermoplastic layer of the laminated material which is intended to act as a sealing layer, can be heated up to sealing temperature in that heat is generated in the adjoining layer containing powdered coal when the latter is subjected to the effect of a high-frequency electric field.

Laminated material comprising an outer sealing layer of thermoplastic

A device to heat seal at least two thermoplastic layers using heat generated by the dielectric loss from a high frequency generator.

Device for the heat-sealing of thermoplastic material or paper material

The present invention concerns a method for the manufacture of laminated packing material containing at least one layer of a metal foil, e.g., aluminum foil, and a layer of plastic material applied to the said metal foil. The invention also concerns an apparatus for the realization of the method for the manufacture of laminated packing material.

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Malmo, Sweden

Gyula Balla