Method for joining a sealing seam of a tubular bag packaging by means of an ultrasound applicator and longitudinal seal joining device for use with said method

Patent metadata

Field	Value
Publication number	US-2016368200-A1
Application number	US-201414901264-A
Country	US
Kind code	A1
Filing date	Jun 11, 2014
Priority date	Jun 28, 2013
Publication date	Dec 22, 2016
Grant date	—

Abstract

The invention relates to a method for joining a sealing seam of a tubular bag packaging by means of an ultrasonic applicator ( 10 ), characterised in that said ultrasonic applicator ( 10 ) generates ultrasonic waves at a frequency of between 0.1 MHz and 5 MHz, preferably between 0.5 MHz and 2 MHz. The invention also relates to a longitudinal seal joining device of a tubular bag machine for use with said claimed method.

First claim

1 . A method for joining a sealing seam ( 8 a , 8 b ) of a tubular bag packaging, the method comprising providing an ultrasonic applicator ( 10 ), and joining the sealing seam with the ultrasonic applicator ( 10 ), wherein the ultrasonic applicator generates ultrasonic waves at a frequency of between 0.1 MHz and 5 MHz.

2 . The method according to claim 1 , characterized in that the ultrasonic waves are introduced in a focused manner onto a joining region of the sealing seam ( 8 a , 8 b ).

3 . The method according to claim 1 , characterized in that a joining region is a fin seam ( 8 a ) or an overlap seam ( 8 b ).

4 . The method according to claim 1 , characterized in that a joining region is supported by a forming tube ( 4 , 107 ) or by a forming shoe ( 4 ).

5 . The method according to claim 1 , characterized in that an amplitude of 1 μm to 2 μm is generated by the ultrasonic applicator ( 10 ) in a region of the sealing seam ( 8 a , 8 b ).

6 . A longitudinal seal joining device of a tubular bag packaging machine comprising an ultrasonic applicator ( 10 ) configured to emit ultrasonic waves at a frequency between 0.1 MHz and 5 MHz.

7 . The device according to claim 6 , characterized in that the ultrasonic applicator ( 10 ) is configured to emit ultrasonic waves at a frequency between 0.5 MHz and 2 MHz.

8 . The device according to claim 6 , characterized in that the ultrasonic applicator ( 10 ) comprises an ultrasonic transducer ( 10 a ) and/or a focusing assembly ( 38 ) and/or a sound conductor ( 10 b ).

9 . The device according to claim 8 , characterized in that the sound conductor ( 10 b ) is provided with attachment means ( 12 ).

10 . The device according to claim 6 , characterized in that said device comprises at least one forming tube ( 4 , 107 ) and/or one forming shoe ( 4 ), which forming tube or which forming shoe is disposed adjacent to the ultrasonic applicator ( 10 ).

11 . The device according to claim 6 , characterized in that the ultrasonic transducer ( 10 a ) is in the shape of a plate or a spherical calotte.

12 . The device according to claim 6 , characterized in that the focusing assembly ( 38 ) is lenticular.

13 . The method according to claim 1 , wherein the ultrasonic applicator ( 10 ) generates ultrasonic waves at a frequency of between 0.5 MHz and 2 MHz.

14 . The device according to claim 6 , characterized in that said device comprises at least one forming tube ( 4 , 107 ) and/or one forming shoe ( 4 ), which forming tube or which forming shoe is disposed adjacent to the ultrasonic applicator ( 10 ) for supporting a packaging material tube ( 8 ) to be sealed or, respectively, a sealing seam ( 8 a , 8 b ).

Assignees

• Bosch Gmbh Robert

Inventors

• Oehm Lukas
• Wieduwilt Ulrich
• Liebler Marko
• Bach Sascha

Classifications

• B29C66/1122

  Single lap to lap joints, i.e. overlap joints (B29C66/45, B29C66/472, B29C66/52272 take precedence) · CPC title

• B29C66/9517

  characterised by specific vibration amplitude values or ranges · CPC title

• B06B2201/72

  Welding, joining, soldering · 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

• B65B2220/08

  Creating fin seals as the longitudinal seal on horizontal or vertical form fill seal [FFS] machines · CPC title