Spinning jenny spinning jenny. It started the factory system. The spinning jenny was invented by James Hargreaves. He was born in Oswaldtwistle, near Blackburn, around 1720. Blackburn was a town with a population of about 5,000, known for the production of "Blackburn greys," cloths of linen warp and cotton weft initially imported from India. They were usually sent to London to be printed. At the time, cotton production could not keep up with demand of the textile industry, and Hargreaves spent some time considering how to improve the process. The flying shuttle (John Kay 1733) had increased yarn demand by the weavers
Spinning jenny grey cloth, and took it to shopkeepers. Ten years later this had changed and the fustian masters were middle men, who collected the grey cloth and took it to market in Manchester where it was sold to merchants who organised the finishing. To handweave a piece of eighteenpenny weft took 14 days and paid 36 shillings in all. Of this nine shillings was paid for spinning, and nine for carding. So by 1750, a rudimentary manufacturing system feeding into a marketing system emerged. In 1738 John Kay started to improve the loom. He improved the reed, and invented the raceboard,