Device, in particular for closing a top portion of a food container, consisting of a laminate with a peeled and folded-back edge region

Patent metadata

Field	Value
Publication number	US-10870508-B2
Application number	US-201515523301-A
Country	US
Kind code	B2
Filing date	Oct 22, 2015
Priority date	Oct 31, 2014
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

A device comprising a first fixing element, a further fixing element, and a folded planar composite is disclosed. The first fixing element comprises a first fixing surface and the further fixing element comprises a further fixing surface. The folded planar composite is at least partially fixed between the first fixing surface and the further fixing surface. The folded planar composite comprises a first composite region and a further composite region.

First claim

The invention claimed is:

1. A device ( 100 ) comprising a first fixing element ( 103 ), a further fixing element ( 104 ) and a folded planar composite ( 101 );
wherein the first fixing element ( 103 ) comprises a first fixing surface ( 105 ) and the further fixing element ( 104 ) comprises a further fixing surface ( 106 );
wherein the folded planar composite ( 101 ) is at least partially fixed between the first fixing surface ( 105 ) and the further fixing surface ( 106 );
wherein the folded planar composite ( 101 ) is a container precursor ( 102 ) surrounding an interior ( 113 ), and comprises a first composite region ( 107 ) and a further composite region ( 108 ) both of which belong to a longitudinal seam ( 111 ) of the container precursor ( 102 );
wherein the first composite region ( 107 ) comprises a first layer sequence comprising, as layers superimposing one another in the direction from the further fixing surface ( 106 ) to the first fixing surface ( 105 ), a first composite layer ( 201 ), a second composite layer ( 202 ), a third composite layer ( 203 ) and a fourth composite layer ( 204 );
wherein, in the first composite region ( 107 ), the third composite layer ( 203 ) is joined to the fourth composite layer ( 204 );
wherein the further composite region ( 108 ) comprises a further layer sequence, comprising, as layers superimposing one another in the direction from the further fixing surface ( 106 ) to the first fixing surface ( 105 ), the first composite layer ( 201 ), the second composite layer ( 202 ) and the fourth composite layer ( 204 );
wherein, in the further composite region ( 108 ), the second composite layer ( 202 ) is joined to the fourth composite layer ( 204 );
wherein the further composite region ( 108 ) is adjacent to the first composite region ( 107 );
wherein the first composite layer ( 201 ) comprises a first carrier layer ( 205 );

wherein the second composite layer ( 202 ) comprises a second carrier layer ( 208 );
wherein the third composite layer ( 203 ) comprises a third carrier layer ( 209 );
wherein the fourth composite layer ( 204 ) comprises a fourth carrier layer ( 212 );
wherein, in the first composite region ( 107 ), the first carrier layer ( 205 ) or the fourth carrier layer ( 212 ) or each of both is characterised by a greater layer thickness than the second carrier layer ( 208 ) or the third carrier layer ( 209 ) or each of both;
wherein, in the further composite region ( 108 ), the second carrier layer ( 208 ) is characterised by a greater layer thickness than in the first composite region ( 107 );
wherein the further fixing surface ( 106 ) comprises a recess ( 213 );

wherein the first composite region ( 107 ) and the further composite region ( 108 ) are each at least partially located between the recess ( 213 ) and the first fixing surface ( 105 );
wherein each of the first carrier layer ( 205 ), the second carrier layer ( 208 ), the third carrier layer ( 209 ) and the fourth carrier layer ( 212 ) comprises a cardboard which has a residual moisture content in a range from 4 to 15 wt.-%;
wherein the first fixing element ( 103 ) is a sonotrode, the further fixing element ( 104 ) is an anvil formed to include the recess ( 213 ), the first fixing surface ( 105 ) does not include a groove or recess, and the further fixing surface ( 106 ) is formed without a plurality of ribs arranged in a region of the recess ( 213 ) and a direction of which is not parallel to the longitudinal seam ( 111 ).

2. The device ( 100 ) according to claim 1 , wherein the first composite layer ( 201 ) comprises, as first composite layer sequence in the direction from the further fixing surface ( 106 ) to the first fixing surface ( 105 ), the first carrier layer ( 205 ) and a first barrier layer ( 206 );
wherein the second composite layer ( 202 ) comprises, as second composite layer sequence in the direction from the further fixing surface ( 106 ) to the first fixing surface ( 105 ), a second barrier layer ( 207 ) and the second carrier layer ( 208 );
wherein the third composite layer ( 203 ) comprises, as third composite layer sequence in the direction from the further fixing surface ( 106 ) to the first fixing surface ( 105 ), the third carrier layer ( 209 ) and a third barrier layer ( 210 );
wherein the fourth composite layer ( 204 ) comprises, as fourth composite layer sequence in the direction from the further fixing surface ( 106 ) to the first fixing surface ( 105 ), a fourth barrier layer ( 211 ) and the fourth carrier layer ( 212 ).

3. The device ( 100 ) according to claim 1 , wherein the sonotrode comprises one selected from the group consisting of an alloy, comprising at least 90 wt.-% titanium or aluminium or both, based on the weight of the alloy; a steel; and a piezo-ceramic or a combination of at least two thereof.

4. The device ( 100 ) according to claim 1 ,
wherein the first composite region ( 107 ) is characterised by a first width ( 109 );
wherein the first width ( 109 ) is in a range from 1 to 10 mm.

5. The device ( 100 ) according to claim 1 , wherein the further composite region ( 108 ) is characterised by a further width ( 110 ); wherein the further width ( 110 ) is in a range from 1 to 10 mm.

6. The device ( 100 ) according to claim 1 ,
wherein the recess ( 213 ) is bordered on opposite sides of the recess ( 213 ) by a first edge ( 304 ) and a further edge ( 303 );
wherein the first edge ( 304 ) comprises a straight first edge section ( 304 );
wherein the further edge ( 303 ) comprises a straight further edge section ( 303 );
wherein the straight first edge section ( 304 ) and the straight further edge section ( 303 ) confine an angle ( 305 ) in a range from 5 to 30°.

7. The device ( 100 ) according to claim 1 , wherein, in the first composite region ( 107 ), the layer thickness of the first carrier layer ( 205 ) or of the fourth carrier layer ( 212 ) or of each of both is 1.1 to 20 times as great as the layer thickness of the second carrier layer ( 208 ) or of the third carrier layer ( 209 ) or of each of both.

8. The device ( 100 ) according to claim 1 , wherein, in the further composite region ( 108 ), the layer thickness of the second carrier layer ( 208 ) is 1.1 to 20 times as great as the layer thickness of this second carrier layer ( 208 ) in the first composite region ( 107 ).

9. The device ( 100 ) according to claim 1 , wherein, in the first composite region ( 107 ), the second composite layer ( 202 ) is not joined to the third composite layer ( 203 ).

10. The device ( 100 ) according to claim 1 , wherein, in the first composite region ( 107 ),
a) a surface of the second carrier layer ( 208 ) which is facing the third carrier layer ( 209 ), and
b) a surface of the third carrier layer ( 209 ) which is facing the second carrier layer ( 208 )

each comprises no top layer and is joined to no top layer.

11. The device ( 100 ) according to claim 1 , wherein the folded planar composite ( 101 ) is constructed in one piece.

12. The device ( 100 ) according to claim 1 , wherein the recess ( 213 ) has a depth ( 214 ) in a range from 0.1 to 5 mm.

13. The device ( 100 ) according to claim 1 , wherein the further fixing surface ( 106 ) is a planar rectangular side surface and the recess ( 213 ) defines a rectangular void.

14. A method which comprises steps of providing the device ( 100 ) according to claim 1 and joining of the first composite layer ( 201 ) to the second composite layer ( 202 ).

15. A method ( 400 ) comprising as method steps ( 401 to 404 )
a) Provision of a folded planar composite ( 101 ) which is a container precursor ( 10

Assignees

• Sig Technology Ag

Inventors

• Garitz Norbert
• Peterges Olivier
• Vetten Thomas
• Alef Ulrich

Classifications

• B32B2439/70

  Food packaging · CPC title

• B32B2439/62

  Boxes, cartons, cases · CPC title

• B32B2307/7265

  Non-permeable · CPC title

• B32B2307/7246

  Water vapor barrier · CPC title

• B32B2307/7244

  Oxygen barrier · CPC title