To eliminate reverse wrinkles in double seams, you can follow these steps:

1. Adjust the 1st operation roll: Reverse wrinkles are often caused by the 1st operation roll being too tight. Check the tightness and adjust it accordingly to ensure the proper pressure is applied during the seaming process.
2. Inspect cover curls: Examine the covers received from the manufacturer for any defects or wrinkles in the curls. If you find any issues, discuss the problem with the cover manufacturer to address the quality of the covers being provided.
3. Check the seaming machine setup: Ensure that the seaming machine is set up correctly, with proper alignment and synchronization of the seaming rolls and chucks.
4. Maintain seaming rolls: Regularly inspect and maintain the seaming rolls to prevent wear and tear, which can lead to reverse wrinkles. Replace worn-out rolls when necessary.
5. Use proper cover materials: Reverse wrinkles can sometimes occur in covers made from double reduction (DR) plate materials. If possible, consider using alternative materials for the covers to prevent reverse wrinkles from forming.

By following these steps and ensuring proper maintenance of the seaming equipment, you can effectively eliminate reverse wrinkles in double seams.

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