I 1750 ble det bygget en skofabrikk i Lean, Massachusetts, som videreutviklet den lokale skomakerteknologien. Der lager arbeidere ikke lenger sko selvstendig, og hver produksjonsledd av sko har ansvaret for en utdannet person. Produksjonslinjen begynner å dannes. Opprinnelig ble skoene fortsatt laget på bestilling, men for å holde arbeiderne opptatt utenom-sesongen begynte eieren av skobutikken å lage sko uten reservasjoner. Disse skoene, kalt sko til salgs, vises i vinduene til lokale butikker. I de første dagene brukte Harvey-brødrene vogner til å laste opp sko for salg og selge dem på nærliggende steder.
In 1793, they opened their first retail shoe store in Boston, selling finished shoes every Wednesday and Saturday. Since the middle of the eighteenth century, inventors have been working on the improvement of sewing machines. It was not until 1790 that the first sewing machine dedicated to leather processing was transformed by an Englishman named Thomas Saint. It's pretty much just an awl that goes straight up to punch holes in the leather. The British Sir Mark Brownler, who was the chief engineer of the New York Harbor, invented a press that used metal needles to sew the upper to the sole. In order to do his duty in Britain's war against Napoleon, with the help of disabled soldiers, Brownle produced 400 pairs of shoes a day. After the war, the British shoe industry returned to manual operations.
