# US 10,307,966 B2 · Induction sealing device and method for manufacturing an induction sealing device

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- Number: US 10,307,966 B2
- Document ID: US10307966B2
- Status: Granted
- Kind: B2
- Application number: 15/021,521
- Filed: 2014-08-22
- Published: 2016-08-04
- Granted: 2019-06-04
- Earliest claimed: 2013-09-13
- Assignees: Tetra Laval Holdings & Finance S.A.
- Applicants: Tetra Laval Holdings & Finance S.A.
- Inventors: Martin Alexandersson; Karl Israelsson; Daniel Sandberg; Karl-Axel Johansson; Vincenzo De Salvo
- Web page: https://patentgrep.com/patent/US10307966B2

## CPC

- B29C 65/3668: {characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special induction coils}
- B29C 65/3656: {being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates}
- B29C 65/368: {with a polymer coating}
- B29C 65/7451: {the severing tool and the welding tool being movable with respect to one-another}
- B29C 66/1122: {Single lap to lap joints, i.e. overlap joints (B29C66/45, B29C66/472, B29C66/52272 take precedence)}
- B29C 66/3462: {by differentially heating the zones of different thickness}
- B29C 66/3472: {in the plane of the joint, e.g. along the joint line in the plane of the joint or perpendicular to the joint line in the plane of the joint}
- B29C 66/4312: {for making flat seams in tubular or hollow articles, e.g. transversal seams}
- B29C 66/72321: {consisting of metals or their alloys}
- B29C 66/7234: {comprising a barrier layer}
- B29C 66/72341: {for gases}
- B29C 66/81427: {comprising a single ridge, e.g. for making a weakening line; comprising a single tooth}
- B29C 66/849: {Packaging machines}
- B65B 51/227: {by induction welding}
- B65B 61/06: by cutting
- C22C 5/08: with copper as the next major constituent
- B29C 66/71: {characterised by the composition of the plastics material of the parts to be joined (welding bar compositions B29C65/125)}
- B29C 66/8122: {characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps}
- B29C 66/81811: {of the welding jaws}
- B65B 9/207: the web advancing continuously (B65B9/22 takes precedence)
- B65B 51/144: {Closing paperboard containers}
- B65B 55/103: {Sterilising flat or tubular webs}
- B65B 61/24: for shaping or reshaping completed packages
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B65B: MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING (bundling and pressing devices for cigars A24C1/44; devices for tensioning and securing binders adapted to be supported by the article or articles to be bound B25B25/00; applying closure members to bottles, jars or similar containers B67B1/00-B67B6/00; concurrent cleaning, filling and closing of bottles B67C7/00; emptying bottles, jars, cans, casks, barrels or similar containers B67C9/00)
- C22C: ALLOYS (treatment of alloys C21D, C22F)

## Abstract

The present invention relates to an induction sealing device for heat sealing packaging material for producing sealed packages. The present invention also relates to a method of manufacturing such an induction sealing device. The device comprises at least one inductor made of an alloy comprising silver and copper.

## Claims

### Claim 1

Induction sealing device for heat sealing packaging material for producing sealed packages, comprising a supporting body possessing an outer surface and at least one inductor made of an alloy comprising silver (Ag) and copper (Cu), the at least one inductor comprising a pair of spaced apart sealing surfaces exposed at the outer surface of the supporting body to produce two parallel and spaced apart seals in the packaging material, the pair of spaced apart sealing surfaces being connected to one another by a loop, the pair of spaced apart sealing surfaces being made of the alloy so that the alloy directly contacts the packaging material during the heat sealing.

### Claim 2 (depends on 1)

The induction sealing device according to claim 1, wherein the alloy comprises Ag, Cu and one or more other elements.

### Claim 3 (depends on 2)

The induction sealing device according to claim 2, wherein the one or more other elements is/are independently of each other selected from the group consisting of Li, Be, Na, Mg, Al, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Zn, Ga, Rb, Sr, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Cd, In, Sn, Cs, Ba, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, TI, Pb, Bi, Fr, Ra, Rf, Db, Sg, Bh, Hs, Mt, Ds, Rg, Cn, Uut, Uuq, Uup, and Uuh.

### Claim 4 (depends on 3)

The induction sealing device according to claim 3, wherein the one or more other elements is/are independently of each other selected from the group consisting of Ni, Fe, Au, Cr, Be, Zr and Pt.

### Claim 5 (depends on 1)

The induction sealing device according to claim 1, wherein the alloy comprises at least 0.1weight % of one or more other element selected from group consisting of Li, Be, Na, Mg, Al, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Zn, Ga, Rb, Sr, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Cd, In, Sn, Cs, Ba, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, TI, Pb, Bi, Fr, Ra, Rf, Db, Sg, Bh, Hs, Mt, Ds, Rg, Cn, Uut, Uuq, Uup, and Uuh.

### Claim 6 (depends on 5)

The induction sealing device according to claim 5, wherein the one or more other element is selected from nickel (Ni), iron (Fe) and gold (Au).

### Claim 7 (depends on 1)

The induction sealing device according to claim 1, wherein the alloy comprises 72-78weight % Ag, 21-27weight % Cu and 0.5-2weight % Ni.

### Claim 8 (depends on 7)

The induction sealing device according to claim 7 wherein the alloy comprises about 74weight % Ag, about 24weight % Cu and about 1weight % Ni.

### Claim 9 (depends on 1)

The induction sealing device according to claim 1, wherein the alloy comprises at least 10weight % Ag, and at least 1weight % Cu.

### Claim 10 (depends on 1)

The induction sealing device according to claim 1, wherein the alloy comprises at least 50weight % Ag.

### Claim 11 (depends on 1)

The induction sealing device according to claim 1, wherein the alloy comprises at least 20weight % Cu.

### Claim 12 (depends on 1)

The induction sealing device according to claim 1, wherein the alloy comprises at least 50weight % Cu.

### Claim 13 (depends on 1)

The induction sealing device according to claim 1, wherein the alloy comprises between 50-97weight % Ag, and 3-50weight % Cu.

### Claim 14 (depends on 1)

Induction sealing device according to claim 1, wherein at least one inductor is at least partly encapsulated in a supporting body comprising a polymeric material.

### Claim 15 (depends on 1)

Induction sealing device according to claim 1, wherein at least one sealing surface of the pair of spaced apart sealing surfaces is provided with a protruding ridge extending along a longitudinal extension of the sealing surface for cooperation with the packaging material and for increasing the sealing pressure on the packaging material during sealing.

### Claim 16

Induction sealing device cooperable with a counter-sealing element to heat seal tubular packaging material and produce sealed packages, the induction sealing device comprising:
a supporting body possessing an outer facing;
an inductor mounted in the supporting body, the inductor being made of an alloy comprising silver and copper;
the inductor which is made of the alloy comprising silver and copper comprising a pair of spaced apart sealing surfaces exposed at the outer surface of the supporting body to produce two parallel and spaced apart seals in the tubular packaging material.

### Claim 17 (depends on 16)

Induction sealing device according to claim 16, wherein each of the sealing surfaces includes a protruding ridge extending along a longitudinal extent of the sealing surface, the protruding ridge at each sealing surface protruding away from the supporting body relative to an adjacent portion of the sealing surface that is exposed at the outer surface supporting body.

### Claim 18 (depends on 16)

Induction sealing device according to claim 16, wherein the spaced apart sealing surfaces are parallel to one another, and further comprising a groove in the outer surface of the supporting body for receiving a cutting tool to cut the tubular packaging material which has been sealed by the seal surfaces.

### Claim 19

Method of manufacturing an induction sealing device for heat sealing packaging material for producing sealed packages, by providing an induction sealing device comprising at least one inductor extending in a longitudinal direction, made of an alloy comprising silver (Ag) and copper (Cu),
the method further comprising:
forming the at least one inductor to possess two sealing surfaces extending in the longitudinal direction parallel to one another;
forming a protruding ridge extending along a longitudinal extension of each of the two sealing surfaces for cooperation with the packaging material and for increasing the sealing pressure on the packaging material during sealing; and
the two sealing surfaces and the protruding ridge of the two sealing surfaces being formed from the alloy which consists of 72-78weight % Ag, 21-27weight % Cu and 0.5-2weight % Ni.