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What are the requirements for pre-gathering the fronts of uppers?
- No protruding edges of the lining, toe cap, etc., on the upper edge.
- All upper materials have to be joined to one material ply. It may be necessary to top-stitch the edge.
- If the upper material is not soft enough, it has to be prepared to
make it suitable for gathering. This can be done by steaming,
heat-activating, pre-shaping or by using a water-soluble leather
softener.
- The PFAFF 3811 allows gathering without any creasing, and thus produces the best possible quality.
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