Smyth also patented a multiple-stitch, off-and-on book sewing machine in 1879. the same year the Smyth Manufacturing Company was organized. Since that time, the Smyth Company has developed more than fifteen versions of the Smyth sewing machine, including a machine that will simultaneously sew "two-up," i.e., two separate, but not yet cut apart, books (imposed for printing "two-up.") This model can take sections from 3 to 10 1/2 inches in width, up to 7 1/2 to 19 inches in height at a speed up to 85 sections a minute. The company has also designed and produced a number of other bookbinding machines, including case-making, gluing and pasting, book trimming, casing-in machines, etc.
David Smyth's contribution to book sewing was such that his name is virtually synonymous in the United States with machine book sewing. See a1so: MACHINE SEWING . (89 )