The machine produces up to 3000 courses, or rows, per minute. The high speeds are possible because a single thread is not introduced into the entire row of needles, but rather every needle is provided with its own thread from a warp beam. Fabrics produced in this manner resemble a woven material more than knitted goods. They retain their shape and are often used in making underwear (charmeuse = silky tricot), sport and leisure wear, upholstery fabrics, curtains, bedding, tablecloths, and even car upholstery fabrics. The principle of loop formation goes back to Josiah Crane who developed the hand warp knitting loom from the hand-knitting frame in 1775.