Felled seam

Felled seam, or flat-fell seam, is a seam made by placing one edge inside a folded edge of fabric, then stitching the fold down. It includes a topstitched finish. It is useful for keeping seam allowances flat and covering raw edges.

The flat-felled seam is the type of seam used in making denim jeans, although it appears inside-out to reduce stitching. It is also used in traditional tipi construction.

There are flat-felled seams and lap-felled seams.

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Seam

Seam may refer to:

SEAM may refer to:

See also

Seam (unit)

A Seam is an obsolete unit of volume or mass in the UK.

The Oxford English Dictionary includes definitions of a seam as:

Cardarelli asserts that it was equal to 64 imperial gallons (290 L).

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Hemming and seaming

Hemming and seaming are two similar metalworking processes in which a sheet metal edge is rolled over onto itself. Hemming is the process in which the edge is rolled flush to itself, while a seam joins the edges of two materials.

Hems are commonly used to reinforce an edge, hide burrs and rough edges, and improve appearance.

Seams are commonly used in the food industry on canned goods, on amusement park cars, and in the automotive industry.

Process

The process for both hemming and seaming are the same, except that the tonnage requirement is greater for seaming. The process starts by bending the edge to an acute angle. A flattening die is then used to flatten the hem.

Types

There are two types of hemmed edges: closed hems and open hems. Closed hems are completely flush while open hems have an air pocket in the bend. The major difference is that the tonnage required for a closed hem is much greater than that for an open hem.

See also

References

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