Knight demonstrated a knack for tools and invention from an early age, and she was said to have contrived a safety device for controlling shuttles in powered textile looms She has been called "the most famous 19th-century woman inventor". Knight conceived a device that would automatically stop a machine if something got caught in it. At the age of 12 she'd already changed the world somewhat when she made cotton mills safer places with a device that prevented shuttles from maiming workers. Marvelous Mattie: How Margaret E. Knight Became an Inventor Margaret Knight: Girl Inventor In the Bag!
Margaret Eloise Knight was an American inventor, notably of the flat-bottomed paper bag. This was the most famous of several inventions that Knight patented at the end of the 19th century. If you ever transported groceries from the store, or packed a lunch for work or school, chances are you’re familiar with Margaret Knight’s invention—the flat-bottomed paper bag. : Margaret Knight Wraps It Up & Not surprisingly, Knight built a wooden prototype of her paper bag making invention and tested it, but she needed an iron one to apply for the patent. Meet the Female Inventor Behind Mass-Market Paper Bags A self-taught engineer, Margaret Knight bagged a valuable patent, at a time when few women held intellectual property Margaret Knight was one of the first women to receive a patent, most notably for her invention of the flat-bottomed paper bag machine. Paper bags had been more like envelopes before. She founded the Eastern Paper Bag Company in 1870, creating paper bags for groceries similar in form to the ones that would be used in later generations.

After the Civil war, Margaret Knight went to work in a Massachusetts paper bag plant. By the time she was a teenager the invention was being used in the mills. Margaret E. Knight, prolific American inventor of machines and mechanisms for a variety of industrial and everyday purposes. Margaret Knight was an employee in a paper bag factory when she invented a new machine part that would automatically fold and glue paper bags to create square bottoms for paper bags. She was working in a paper-bag factory when she devised a new way to put together the bags.
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