Seals

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Basic seal joint types
Notch joint
One way to lock strap ends is to press, or “Notch” the seal and the strapping it joins to form tabs at the edges. These tabs are bent down (regular) or bent up (reverse). The strength of the notch-joint comes from the mechanical interlock between the seal and the strapping. Notch-joints are typically used on waxed strapping in packaging and unitizing applications.

Crimp joint
Another way to seal the ends of strapping is to press, or “Crimp” undulations into the seal and strapping ends. The strength of crimp-joint comes from the deformed seal creating high frictional forces. Crimp joints produce high static and dynamic joint strengths and are used on applications like car loading, where the strapped load is subjected to severe impact.

Sealless joint
Sealless joint can be made with Signode manual or pneumatic combination tools. Sealless joints do not require the use of metal seals and provide static joint strength equivalent to Notch-type joints.

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