Method for producing a transverse sealing seam and transverse sealing device

Patent metadata

Field	Value
Publication number	US-9931786-B2
Application number	US-201213982554-A
Country	US
Kind code	B2
Filing date	Feb 9, 2012
Priority date	Feb 11, 2011
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

The invention relates to a method for producing a transverse sealing seam in a tubular bag ( 6 ) having a longitudinal sealing seam ( 5 ), wherein the tubular bag ( 6 ) is passed through between a sonotrode ( 1 ) and an anvil ( 2 ) and, in order to produce the transverse sealing seam, the sonotrode ( 1 ) and the anvil ( 2 ) are moved toward each other so that a welding force is applied to the tubular bag ( 6 ). In order to provide a method and transverse sealing device with which the stated disadvantages can be overcome at least reduced, the longitudinal sealing seam ( 5 ) is moved through a gap ( 8, 7′ ) formed in the sonotrode ( 1 ) or the counter tool ( 2 ) at least during the application of the welding force.

First claim

The invention claimed is:

1. Method for producing a transverse sealing seam in a tubular bag exhibiting a longitudinal sealing seam ( 5 ) in which the tubular bag ( 6 ) is moved through between a sonotrode ( 1 ) and an anvil ( 2 ) and the sonotrode ( 1 ) and the anvil ( 2 ) are moved against one another to produce the transverse sealing seam so that a welding force is applied to the tubular bag ( 6 ), characterised in that at least during the application of the welding force the longitudinal sealing seam ( 5 ) is moved through a gap ( 7 ) formed in the sonotrode ( 1 ) or the anvil ( 2 ).

2. Method according to claim 1 , characterised in that the gap ( 7 ) has a gap width of between 0.05 and 0.3 mm.

3. Method according to claim 1 or 2 , characterised in that a two-part sonotrode ( 1 ) or a two-part anvil is used, in which the distance between the two parts of the sonotrode ( 1 ) or the anvil is adjusted according to the thickness of the longitudinal sealing seam ( 5 ).

4. Transverse sealing device with a sonotrode ( 1 ) and an anvil which are arranged in such a way that a strip of material to be processed can be moved through between the sonotrode ( 1 ) and the anvil, characterised in that the anvil exhibits a slot ( 7 ) having a width between 0.0 and 0.2 mm.

5. Transverse sealing device according to claim 4 , characterised in that the anvil exhibits a plurality of slots of different widths.

6. Transverse sealing device according to claim 4 or 5 , characterised in that the slot width is adjustable.

7. Transverse sealing device according to one of claims 4 to 5 , characterised in that the anvil are formed in two parts, the slot ( 7 ) being formed between the two parts.

8. Transverse sealing device according to claim 7 , characterised in that one part is moveable relative to the other part so that the slot width can be adjusted.

9. Transverse sealing device according to one of claims 4 to 5 characterised in that the depth of the slot ( 7 ) is greater than the width of the slot.

10. The method of claim 1 , wherein the gap width is between 0.07 and 0.2 mm.

11. The method of claim 1 wherein the gap width is between 0.0 and 0.15 mm.

12. Method for producing a transverse sealing seam, the method comprising:
a) providing a tubular bag ( 6 ) having a longitudinal sealing seam ( 5 );
b) providing a sonotrode ( 1 ) and an anvil ( 2 ), the sonotrode ( 1 ) or the anvil ( 2 ) having a gap ( 7 ) for receiving the longitudinal sealing seam ( 5 );
c) moving the tubular bag through between the sonotrode ( 1 ) and the anvil ( 2 );
d) moving the sonotrode ( 1 ) and the anvil ( 2 ) against one another;
e) applying a welding force transversely to the tubular bag to form the transverse sealing seam in a strip of the tubular bag; and
f) moving the longitudinal sealing seam ( 5 ) through the gap ( 7 ) formed in the sonotrode ( 1 ) or the anvil ( 2 ) during the application of the welding force.

13. Method according to claim 12 , the longitudinal sealing seam extending generally perpendicularly to the strip of the tubular bag and in the gap ( 7 ) during application of the welding force.

14. Method according to claim 12 , the sonotrode ( 1 ) or the anvil ( 2 ) being comprised of two parts, the distance between the two parts being adjustable, the longitudinal sealing seam ( 5 ) having a thickness, the method further comprising adjusting the distance between the two parts according to the thickness of the longitudinal sealing seam ( 5 ).

15. Transverse sealing device according to claim 4 , the sonotrode having a sealing face, the anvil having a sealing surface, the slot extending generally perpendicularly to the sealing face of the sonotrode and the sealing face of the anvil.

16. Transverse sealing device with a sonotrode ( 1 ) and an anvil ( 2 ) which are arranged in such a way that a strip of material to be processed can be moved through between the sonotrode ( 1 ) and the anvil ( 2 ), characterised in that the sonotrode ( 1 ) exhibits a slot ( 7 ), wherein the slot width is adjustable between 0.0 and 0.2 mm.

17. Transverse sealing device according to claim 16 , characterised in that the sonotrode is formed in two parts, the slot ( 7 ) being formed between the two parts.

18. Transverse sealing device according to claim 16 , characterised in that one part is moveable relative to the other part so that the slot width can be adjusted.

19. Transverse sealing device according to one of claims 16 to 17 characterised in that the depth of the slot ( 7 ) is greater than the width of the slot ( 7 ).

20. Transverse sealing device according to claim 16 , the sonotrode ( 1 ) having a sealing face, the anvil ( 2 ) having a sealing surface, the slot ( 7 ) extending generally perpendicularly to the sealing face of the sonotrode ( 1 ) and the sealing face of the anvil ( 2 ).

Assignees

• Herrmann Thomas
• Bobschek Born Franz
• Herrmann Ultraschalltechnik Gmbh & Co Kg

Inventors

• Herrmann Thomas
• Bobschek-Born Franz

Classifications

• B65B51/303

  reciprocating along only one axis · CPC title

• B65B51/225

  by ultrasonic welding · CPC title

• B29C66/849

  Packaging machines · CPC title

• B29C66/836

  Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table (B29C66/65 takes precedence) · CPC title

• B29C66/8322

  Joining or pressing tools reciprocating along one axis · CPC title