Automatic lock: seal cap system with originality protection

Automatic Lock is the only seal cap system with a plastic cap seal that is suitable for use with automatic drum filling systems.
Seals have a long tradition in history. Thousands of years ago they were used to ensure the integrity of containers and their contents. The seal of the new Automatic Lock cap system for Schütz plastic drums may not look like a medieval wax seal, but this capping system – which is suitable for automatic lines – it fulfils the same purpose: it demonstrates originality and protects quality.

The seal cap system for PE drums consists of a plug and a tamper-proof sealing cap, either in red or white. The outstanding feature of the system is that it cannot be opened without breaking the seal cap, as the inner seal ring is firmly incorporated in the ring. The filling product is fully protected against unwanted discharge or contamination. The seal cap is available for a variety of different bung sizes.


The seal cap can be fitted automatically or manually. First, the seal cap is placed on top of the plug; it centres itself automatically due to the position of the snap latches. Light pressure on the positioned seal cap makes the locking ring snap into place behind the snap latches in the plug. The rigid construction ensures the lock remains securely in place once fitted.  The plastic tab connectors on the cap and the inner seal ring tear when the cap is opened.  The ring is perforated, making it easy to lift off the seal cap. The cap is opened and lifted off in a single movement by pulling on the seal cap ring pull, allowing the plug to be unscrewed and the contents to be removed.


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Automatic lock: seal cap system with originality protection
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A sealing cap with many advantages


Automatic Lock is the only seal cap system that is suitable for use with automatic drum filling systems and it offers numerous other advantages over conventional solutions. In contrast, standard plastic caps only close the bung opening without providing seal of originality, meaning that tampering can remain undetected. With Automatic Lock the seal cap is held by the plug and not by the bung. The broken seal cannot be repaired, and any tampering is instantly visible.


Compared with steel caps which are also fitted with a seal function to prevent tampering, key advantages of the new plastic system are the hygienic and non-corrosive material. Accordingly, Automatic Lock is certified for use on Schütz's Foodcert drums for food applications. In addition, the new seal cap system is exceptionally user-friendly: the integrated ring pull does not require an extra tool for opening, as is the case with steel sealing caps.