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Margaret E. Knight
Margaret Eloise Knight (February 14, 1838 – October 12, 1914) was an American inventor, notably of a machine to produce flat-bottomed paper bags. She has been called "the most famous 19th-century woman inventor". 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. Knight received dozens of patents in different fields and became a symbol for women's empowerment.
Margaret E. Knight was born in York, Maine on February 14, 1838, to Hannah Teal and James Knight. As a little girl, “Mattie,” as her parents and friends nicknamed her, preferred to play with woodworking tools instead of dolls, stating that “the only things [she] wanted were a jack knife, a gimlet, and pieces of wood.” She was known as a child for her kites and sleds.
Knight and her brothers, Charlie and Jim, were raised by their widowed mother; Knight's father died when she was young, after which the impoverished family moved to Manchester, New Hampshire, where employment was available in the cotton mills. Any formal education she had was limited to secondary school, as she left to work in the mills at age 12 with her siblings.
12-year-old Knight witnessed an accident at the mill in which a worker was stabbed by a steel-tipped shuttle that shot out of a mechanical loom. Within weeks she invented a safety device for the loom, which was later adopted by other Manchester mills. The device was never patented and its exact nature is unknown, though it may have been either a device to stop the loom when the shuttle thread broke or a guard to physically block a flying shuttle.
Health problems precluded Knight from continuing to work at the cotton mill. In her teens and early 20s she held several jobs, including in home repair, daguerreotype photography, engraving, and furniture upholstery.
Knight's first patent, issued in 1870, was for an "improvement in paper-feeding machines", a "pneumatic paper-feeder" with applications in printing presses and paper-folding machines; her paper bag machine would feature a three-step folding process in forming the flat bottom. At the time, many female inventors and writers concealed their gender by using only an initial instead of their given name, but Margaret E. Knight was identified in this patent.
Knight moved to Springfield, Massachusetts in 1867 and was hired by the Columbia Paper Bag Company. She noticed that the envelope-shaped machine-made paper bags they produced were weak and narrow, and could not stand on their bases. They were also poorly suited to bulky items, such as groceries and hardware goods. Machines for producing these envelope-style bags were the subject of three patents issued to Francis Wolle in 1852, 1855, and 1858. Flat-bottomed paper bags, which were sturdier and more useful, were expensively made by hand.
Such flat-bottomed bags were already in general use in Britain since at least the 1840s and improvements to hand-production techniques occurred during the 1850s.[citation needed] For example, a patent was awarded to James Baldwin of Birmingham in 1853 for semi-mechanized apparatus to use in the making of flat-bottomed paper bags. However, thinking to more fully automate the process, in 1868 Knight invented a machine that cut, folded, and glued paper to form the flat-bottomed brown paper bag familiar to shoppers today. This machine enabled the mass manufacture of flat-bottomed bags, increasing the speed of production.
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Margaret E. Knight
Margaret Eloise Knight (February 14, 1838 – October 12, 1914) was an American inventor, notably of a machine to produce flat-bottomed paper bags. She has been called "the most famous 19th-century woman inventor". 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. Knight received dozens of patents in different fields and became a symbol for women's empowerment.
Margaret E. Knight was born in York, Maine on February 14, 1838, to Hannah Teal and James Knight. As a little girl, “Mattie,” as her parents and friends nicknamed her, preferred to play with woodworking tools instead of dolls, stating that “the only things [she] wanted were a jack knife, a gimlet, and pieces of wood.” She was known as a child for her kites and sleds.
Knight and her brothers, Charlie and Jim, were raised by their widowed mother; Knight's father died when she was young, after which the impoverished family moved to Manchester, New Hampshire, where employment was available in the cotton mills. Any formal education she had was limited to secondary school, as she left to work in the mills at age 12 with her siblings.
12-year-old Knight witnessed an accident at the mill in which a worker was stabbed by a steel-tipped shuttle that shot out of a mechanical loom. Within weeks she invented a safety device for the loom, which was later adopted by other Manchester mills. The device was never patented and its exact nature is unknown, though it may have been either a device to stop the loom when the shuttle thread broke or a guard to physically block a flying shuttle.
Health problems precluded Knight from continuing to work at the cotton mill. In her teens and early 20s she held several jobs, including in home repair, daguerreotype photography, engraving, and furniture upholstery.
Knight's first patent, issued in 1870, was for an "improvement in paper-feeding machines", a "pneumatic paper-feeder" with applications in printing presses and paper-folding machines; her paper bag machine would feature a three-step folding process in forming the flat bottom. At the time, many female inventors and writers concealed their gender by using only an initial instead of their given name, but Margaret E. Knight was identified in this patent.
Knight moved to Springfield, Massachusetts in 1867 and was hired by the Columbia Paper Bag Company. She noticed that the envelope-shaped machine-made paper bags they produced were weak and narrow, and could not stand on their bases. They were also poorly suited to bulky items, such as groceries and hardware goods. Machines for producing these envelope-style bags were the subject of three patents issued to Francis Wolle in 1852, 1855, and 1858. Flat-bottomed paper bags, which were sturdier and more useful, were expensively made by hand.
Such flat-bottomed bags were already in general use in Britain since at least the 1840s and improvements to hand-production techniques occurred during the 1850s.[citation needed] For example, a patent was awarded to James Baldwin of Birmingham in 1853 for semi-mechanized apparatus to use in the making of flat-bottomed paper bags. However, thinking to more fully automate the process, in 1868 Knight invented a machine that cut, folded, and glued paper to form the flat-bottomed brown paper bag familiar to shoppers today. This machine enabled the mass manufacture of flat-bottomed bags, increasing the speed of production.