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Overlooked No More: Margaret E. Knight, Innovator of the Flat-Bottomed Paper Bag

In an era when female inventors were rare, Margaret Knight emerged as a pioneering figure whose innovation continues to impact our daily lives. Born in 1838, Knight invented the machine that created flat-bottomed paper bags, revolutionizing the way we carry groceries and other items to this day.

Working in a paper bag factory in Massachusetts, Knight observed the limitations of the narrow, envelope-style bags of the time. In 1868, she developed a machine that automatically folded and pasted flat-bottomed paper bags, creating a more practical and sturdy design. These bags could stand upright on their own and carry more items than their predecessors.

Knight's journey to patent her invention wasn't without challenges. Charles Annan, who had seen her machine, attempted to patent the idea himself, claiming a woman couldn't have designed such a sophisticated device. Knight successfully fought back, proving her invention's originality in court and receiving her patent in 1871.

Her accomplishments include:

Creating the first machine to produce flat-bottomed paper bags
Securing the patent despite gender discrimination
Establishing the Eastern Paper Bag Company
Earning recognition as one of the first women to receive a U.S. patent

Throughout her lifetime, Knight would go on to receive 26 patents, earning her the nickname 'Lady Edison.' Her flat-bottomed paper bag design became the industry standard, and variations of her original machine continued to be used well into the 20th century.

Today, Kn

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