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Packaging sealing

LSM Fin longitudinal seal modules

The LSM Fin is the logical further development of the longitudinal seal modules from Herrmann. Its compact design means that it can be easily integrated in both horizontal and vertical bag machines.

  • 35 kHz operating frequency 
  • speed of up to 120 m/min
  • 3 force ranges of 12 N - 270 N

Precise and straightforward adjustment options and the electronic force setting allow for reproducible sealing results with consistently high levels of quality – also with a varying production speed. 

In the LMS Fin, the longitudinal seal is created on the basis of the continuous guidance of the films past the fixed installation tools. This means that the synchronization of rotating tools with the film feed is not necessary. The ultrasonic ensures minimal frictional forces and enables a  consistent film movement. Depending on the requirements, various sealing blades are available for determining the seal design.

The  generation of the sealing force is pneumatic and set electronically via a proportional control valve. This enables the rapid adjustment of the force during the process and for constant sealing results to be guaranteed – even with a varying production speed.
The LSM Fin is designed so that all the settings are easy to use and easily accessible. The anvil holder with sealing blade can be easily removed for cleaning – all of the settings are saved for the reassembly.

  • High process stability with varying process speed
  • Minimum (construction) space requirement due to compact design
  • Intuitive and easily accessible setting options
  • Anvil can be easily removed for rapid cleaning
  • Rapid adjustment of the process parameters due to electronic settings
application engineering

Application examples

  • Sweets and snacks
  • Meats and sausages
  • Baked goods

Advantages of ultrasonic sealing technology

  • Tight and strong sealing lines, even with seal contamination
  • No thermal influence on the product thanks to cold sealing tools
  • Instant on: no extra time to heat up the sealing tools necessary
  • No cold sealing mass required
We work with you to develop customized solutions which correspond to your demands precisely. As experts in our field, we develop applications which make your project a success. Here, we rely on long-standing technology partnerships and the results from over 40 high-tech laboratories around the world.
We offer a premium product portfolio with the highest quality standards – Made in Germany. We stand for top weld results, professional integration and durability of all ultrasonic components and modules for an economical overall solution.
We guarantee reliability, safety and a quick on-site service as part of our concept, and immediate support in over 20 countries. For you, this means quick help when you really need it – at any time and in your local language.
A simple route to more sustainability: not a problem with our efficient ultrasonic technology! The ability to do without joining materials and the low energy consumption mean that your production process will automatically become more sustainable. Reliable bonding will also reduce your rejects and prevent you from generating unnecessary waste.

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