Wire ridges/creases

Note: Ridges often develop into wrinkles that may progress into a rope-up or overlap.
1. Diagonal ridges are usually caused by misalignment.
2. Straight ridges are usually caused by:
— stock build-up between breast roll and apron.
— build-up on dewatering devices.
— pitch build-up.
— excessive water in return runs.
3. Ridges may develop from:
— excessive table shake travel.
— roll deflection.
— distorted belt on multi-vacuum box units.
— cutting in vacuum pump after sheet is on the wire.
— steam boxes turned on while fabric is turning slowly or is stalled out.
4. Overall wire wear may be due to:
— fuzzing from rough suction box covers.
— corroded couch.
— worn or disintegrating fiberglass roll coverings.