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Cover Hook (End Hook)

cover hook

The cover hook is also known as End Hook. It is formed from the curling of the lid’s during the formation of the double seam.  If the cover hook is incorrect – this can lead to bad seams, bad overlap and ultimately a serious defect. Cover hook can be measured indirectly after a teardown procedure, or directly through a seam inspection system by cutting or sectioning of the seam with a twin blade saw (or “bread saw”).

Possible causes for Short Cover Hook:

short cover hook

short-cover-hook

long body hook

Possible causes for Long Cover Hook:

long cover-hook

 

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