Search within the title, abstract, claims, or full patent document: You can restrict your search to a specific field using field names. Search for Plural Paper Bags (i.e.Margaret Knight (1838–1914) applied for a patent using this model to demonstrate her machine that folded and pasted flat-bottomed paper bags. In 1868, Knight invented a wooden machine that folded and glued paper into an economical, roomy, and rectangular receptacle. Then a man stole her idea. Margaret Knight (1838–1914) applied for a patent using this model to demonstrate her machine that folded and pasted flat-bottomed paper bags. In New York City, businesses are required to collect a non-taxable 5-cent fee from customers on paper carryout bags, with some exceptions. A paper bag is a bag made of paper, usually kraft paper. Paper bags can be made either with virgin or recycled fibres to meet customers' demands. There's nothing special about a brown paper lunch sack, grocery bag, or gift bag.