Lockstitch


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Lockstitch

 

in sewing, the portion of stitched thread between two punctures of the needle, produced by means of a shuttle. In lockstitches the interlacing of the threads normally takes place in the material; the form of the stitching on the front and back sides is identical.

Figure 1. Sequence In the formation of a lockstitch by drawing a loop around a bobbin: (1) needle thread, (2) thread tensioner, (3) eye-pointed needle, (4) bobbin thread, (5) shuttle, (6) material being sewn

Lockstitching usually involves two threads; three threads are used when working with two needles and one shuttle. Lockstitches do not permit much stretching along the stitching and are therefore unsuitable for elastic materials, for example, in knitwear. They are not subject to raveling. Their principal drawback is the loss in strength in the needle thread, since the same portion of the thread passes through the eye of the needle many times while forming the stitches (see Figure 1).

References in periodicals archive ?
Prediction of strengths of lockstitch seams in woven fabrics" Journal of the Textile Institute PP.
Contract Awarded for Pack 7 lockstitch sewing machine for industrial use 10sets,industrial sewing machine with flat eye lock button hole 3sets,lockstitch sewing machine for flat sewing 3sets
CSA-3470 Series is a high speed, single needle, lockstitch, cylinder-bed, electronic bartacking machine that can reach sewing speed of 3200 S.
Tenders are invited for Single Needle Extra Heavy Duty Zig-Zag, 2/3 Step, Lockstitch Industrial Sewing Machine As Per Specification, Atp And Complinace Chart
Sewing machines which are best-suited to applications such as car seats, furniture, shoe uppers, bags and pouches will be introduced, including a cutting-edge unison-feed, lockstitch machine with a large hook and a computer-controlled cycle machine.
Salhotra, "Strength reduction of sewing threads during high speed sewing in an industrial lockstitch machine: Part I -mechanism of thread strength reduction" International Journal of clothing science and Technology,1997,Vol-9, Issue-5,pp-334-345.
Limited tenders are invited for purchase of lockstitch machine
Limited tenders are invited for Supply of lockstitch machines
Limited Tenders are invited for Lockstitch Machines
Tenders are invited for Single Needle Extra Heavy Duty Zig Zag 2/3 Step Lockstitch Industrial Sewing Machine As Per Specificatiom Atp And Compliance Chart
Tenders are invited for Sewing Machine Juki-Ddl-8100Eb, 1 Needle Lockstitch Machine Model- Ddl-8100Eb , Make-Juki Eco Or Similar Application- Light To Medium Weight, Max- Sewing Speed 4500Sti/Min , Max Stitch Length Percent U2013 5 Mm Needle Bar Stroke- 30.