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Recognizing Double Seam Component Defects.

This sections deals with Double Seam Components and how to measure and recognize defects. There is instructions on how to strip or tear down a Double Seam with end cutters to expose Body Hooks and Cover Hooks. Visual inspection of these components will reveal possible defects not seen through a Seam Scope or Projector.

Stripping a Double Seam for Inspection

Stripping a Double Seam for Inspection
There are several means of seam inspection generally established by each individual or manufacturer, such...

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Reverse Wrinkle

Reverse Wrinkle
A Reverse Wrinkle projects towards the can body or the center of the can. The...

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Pressure Ridge

Pressure Ridge
This should be a clearly visible impression around the inside of the can body which...

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Pleats & Puckers

Pleats & Puckers
A Pleat is a fold in the Cover Hook that extends form the cut edge...

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Deep Countersink

Deep Countersink
The Countersink measurement should be approximately equal to the thickness of the Seaming Chuck flange...

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Cover Hook Wrinkling

Cover Hook Wrinkling
A wrinkle in the cover hook which projects toward the can body hook or outward...

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