If you notice creases in the wrinkle of the double seam for cans, you may consider making the following adjustments:

1. Check the locking or first operation rollers and make sure they are not too loose. Tighten them if necessary.
2. Inspect the rollers for wear and replace them if worn.
3. 3. Make sure that the second operation rollers are not too tight, as this may aggravate the crease or pucker. Adjust accordingly.
4. Review the can end design and make improvements if necessary.
5. 5. Look for any residual wrinkles along the end curl and fix them.

Always make sure that your equipment is well maintained and calibrated to avoid defects such as creases and wrinkles.

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