Longitudinal seal modules(Herrmann Ultraschalltechnik GmbH & Co. KG)

The LSM Fin longitudinal seal module stands for high quality, continuously manufactured sealing lines on bags (horizontal and vertical) and on chained bags. Easily exchangeable sealing tools allow for an individual and material-saving seal design.

LSM Fin longitudinal seal module

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.

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

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

Precise, versatile, and economical – Herrmann Ultraschall sealing technology provides solutions for complex applications while being easy to integrate and user-friendly. Intelligent solutions with force profile, as well as a great number of variants and options within the framework of a flexible modular system ensure strategic, easy, and individual configuration and integration of sealing applications. With superior technology and ultimate efficiency, Herrmann Ultraschall sets international standards for ultrasonic sealing technology.

Persuasive advantages

Hermetic seal achieved even through residue in the seal area
Product protection due to cold tools and short sealing time
Significant reduction in packaging material due to narrow seals reduced head space and the use of less complex and costly materials
Attractive visual appearance by avoiding film shrinkage
High degree of reproducibility of process results

The products and services provided by Herrmann Ultraschall for the entire packaging industry are proven in many applications such as film packaging (e.g. stand-up pouches, pillow bags), drink packaging (e.g. film, carton), coffee capsules and tea bags, spouts, valves or zippers.

Herrmann Ultraschall GmbH & Co.KG, founded 1961, is the global technology leader in ultrasonic welding of thermoplastics with a worldwide presence. Through their headquarters in Karlsbad/Germany, Bartlett/USA, China and Japan and the Tech Centers and branch offices in Europe, the Americas, and Asia, the machine builder ensures global presence and local service for their customers. With 400 employees worldwide and over five decades of know-how Herrmann Ultraschall is a family-owned company whose success lies in its intense application and project consulting (Ultrasonic Engineering) by highly trained staff.