safe sealing of liquids

The food and cosmetics industries require a wide variety of packaging solutions for liquids. These packages usually have a closure which may also be resealable and/or sealed. This places high demands on the quality of the closure. Production errors cannot be tolerated. Reliable quality control is therefore indispensable. We supply solutions that reliably test the closure.


A closure for liquids usually consists of several components. The cap, the spout, and possibly other components such as a seal or gasket. With our systems we test every single component. In a subsequent assembly station, the correct assembly is then finally checked to ensure that the closure really closes securely.

At the beginning, we analyse the closure precisely and develop a suitable test concept together with our customers. How many camera stations are necessary? Which lighting is most suitable? And what are the criteria for a safe closure?


Depending on the type of closure and the extent of the test requirements, the complexity of a closure control can be very high. However, we always try to develop a test concept that is as simple as possible. This has many advantages for the customer. Integration into the machine is easier. The commissioning time is shortened. And later operation and maintenance is simplified. In the end, these optimizations save considerable costs and result in an image processing system that is easy to maintain.

If several camera stations are necessary for the inspection, we can use our async option to control different camera stations via one control unit. This saves further costs and valuable space at the machine.

Even if we have found a solution for safe inspection, we try to further optimize the concept and save complexity.


In this example, impurities are tested at various points of the cap and the spout. The safe closure is ensured by measuring the distance between the closure and the spout as well as the completeness of the quality closure (tamper). In addition, the correct colour type and the diameter of the cap are checked.

In a previous station, the typical injection moulding defects such as over- and underinjections were already checked.

Individual inspection concept

  • Close cooperation in concept development
  • Minimization of complexity

Reliable quality control

  • Testing of individual components
  • Final inspection after assembly