Selvedge are special hooked needle driven by a cam which produces, after cutting, the insertion of the protruding thread end into the subsequent shed, thus forming a stronger edge. The basic function of any selvedge is to lock the outside warp threads of a piece of cloth and so prevent fraying. The selvedge should be strong enough to withstand the strains of the stenter in the finishing process. - The selvedge should have a neat and uniform appearance.

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Selvedges

Selvedges Weaving Selvedges Mechanism A special hooked needle driven by a cam produces, after cutting, the insertion of the protruding thread end into the subsequent shed, thus forming a stronger edge.

This system is generally used for light to middle weight fabrics, when weave and fabric density permit. There are also available tuck-in selvedge motions which are entirely controlled by pneumatic or mixed pneumatic and mechanical devices.

Leno selvedges

Leno Selvedges Weaving Leno Selvedges Mechnism These selvedges are obtained by binding the wefts with strong additional threads working in gauze weave and by eliminating through cutting the protruding weft ends.

The leno gauze system is optimally suited for heavy fabrics, blankets, wall coverings. Fig. 116 illustrates the operation scheme of the device proposed by a manufacturer, in which device two complete leno gauze mechanisms work in combination. A leno device produces the fabric selvedge, while the other device forms the auxiliary selvedge.

Fused selvedges

These are obtained by pressing a hot mechanical element on the fabric edge; this method can be applied on fabrics in man-made fibres.

Devices for centre selvedges

All these three systems allow the formation
also of centre or ″split″ selvedges, when
several lengths of cloth are woven on the same
machine.

« Previous Topic Weft and warp control	Next Topic » Woven Design

The weft stop motion controls the correct insertion of the weft into the shed. Warp and weft stop motions will stop the loom most immediately when a warp end or a pick breaks off. It avoids the faults disturbing the fabric surface. It helps not degrading the fabric quality. The feeders are supplied together with various outfits and adjustment possibilities, which vary according to the yarn type and count and to the insertion system used.	woven fabrics are made by using two or more sets of yarn interlaced at right angles to each other. Much variety is produced by weaving.

Categories

Selvedge

Selvedges

Leno selvedges

Fused selvedges

Devices for centre selvedges

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