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This is a condition where the seam has a sharp edge around the top inside edge of the cover and is a good indication that it has been forced over the top of the Seaming Chuck flange.

Sharp-Seam Sharp Seam
Probable CauseSuggested Remedy
1st Operation Seaming Roll set too high or too low over the Seaming Chuck flangeRe-adjust 1st operation seaming roll groove profile height to a maximum .003 of an inch over the seaming chuck flange when at tis furthest inward travel. See Parts List & Instructions or Service Manual for adjustments.
1st Operation Seaming Roll set too tightSee the Parts List & Instructions or Service Manual for adjustments
Seaming Chuck may be worn at the top edge of the flange from 1st Operation Seaming Roll running into it.Check seaming roll for damage and replace if necessary. Replace the Seaming Chuck and readjust the Seaming Roll. If the Seaming Roll needs to be replaced refer to the Parts List on your Service Manual.
1st Operation Seaming Roll groove profile may be too narrowReplace 1st Operation Seaming Rolls with the proper groove profile
Seaming Chuck Bell may be adjusted too low or bent down so that the Seaming Chuck Bell is dragging on the can.If a sharp seam appears on one station only, the the Chuck Bell is probably bent. Straighten to correct position. If a sharp seam appears on all stations, adjust Seaming Chuck Bell upward using the two adjusting set screws provided on Model 60L Seamers. On 41L, 61H, 62H, 80L, 81L, 100L, 101L, 120L, 121L, 140S and 180S Seamers, install or remove Shims above Seaming Chucks to adjust height. See respective Service Manuals for procedures.
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