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An overlock is a kind of stitch that sews over the edge of one or two pieces of cloth for edging, hemming, or seaming. Usually an overlock sewing machine will cut the edges of the cloth as they are fed through (such machines being called sergers in North America), though some are made without cutters. The inclusion of automated cutters allows ...
Of a typical garment factory's sewing machines, half might be lockstitch machines, and the other half divided between overlock machines, chain stitch machines, and various other specialized machines. Industrial lockstitch machines with two needles, each forming an independent lockstitch with its own bobbin, are also very common.
The Merrow Sewing Machine Company, best known for inventing the overlock sewing machine, is a manufacturer of sewing machines.After the explosion of his gunpowder mill in 1837, in 1838 J.M. Merrow built a knitting mill on the same site.
This crochet machine was the first production overlock sewing machine. The Merrow Machine Company went on to become one of the largest American manufacturers of overlock sewing machines and remains in the 21st century as the last American over-lock sewing machine manufacturer.
Joseph Merrow was the driving force behind Merrow developing new technology, growing the new business and transforming it from a regional supplier of crochet sewing machines, to the market leader manufacturing hundreds of models of industrial overlock sewing machines.
A free arm houses the machine's feeder and bobbin driver in a tubular arm-shaped bed, enabling material to be wrapped around the mechanism during sewing rather than simply resting on top of it. A free arm greatly simplifies sewing tasks like darning and hemming on delicate fabrics and difficult-to-reach seams—uses for which Elna was heavily ...
A blind stitch in sewing is a method of joining two pieces of fabric so that the stitch thread is invisible (or nearly invisible) during the normal use of the finished product. Blind stitching uses a folded edge of the fabric to hide the stitches; therefore, this type of stitch can be used to create a blind hem or to join two folded edges together.
A plain seam is the most common type of machine-sewn seam. It joins two pieces of fabric together face-to-face by sewing through both pieces, leaving a seam allowance with raw edges inside the work. The seam allowance usually requires some sort of seam finish, usually an overlock in ready to wear or bias tape in couture sewing, to prevent ...