The next few pages are examples of Double Seam defects seen visually or felt by hand. Good judgement and experience with Double Seams will save a lot of time if defects are spotted immediately. Visual inspection of Double Seams should be made frequently and on a scheduled basis. Cross section and Tear down of the Double Seam for component inspection follow this section of Visual Defects.
Wooling

Wooling or sometimes called 'Slivering' is a condition that is more predominant with aluminum beverage...
Knocked Down Flange

A condition similar to a False Seam. Probable Cause Suggested Remedy Can flange damaged in...
Dead Head or Skidder

A condition where the 2nd operation seam is not finished all the way around the...
Creasing

Creasing or sometimes called Scoring, is predominantly related to aluminum necked in beverage cans with...