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Early Patent:- A patent for a "tea leaf holder," a similar concept, was filed in 1901 by Roberta Lawson and Mary Molaren and granted in 1903, predating Sullivan's popularization of the idea.
Modern Machine:- In 1929, Adolf Rambold invented the first tea bag packing machine for the German company Teekanne, creating a dual-chamber parchment paper bag.
Paper Bags:- The heat-sealed, paper fiber tea bag was patented in 1930, while the now-common rectangular shape was developed in 1944.
Thomas Sullivan's Marketing:- Around 1908, Thomas Sullivan sent samples of his tea in small, porous silk bags to customers as a cost-saving measure.
Customer Convenience:- Rather than opening the bags to remove the loose tea as intended, customers discovered the convenience of brewing the tea directly in the bag.
Popularity and Evolution:- This accidental use led to increased demand for the "tea bags," and Sullivan began selling them, using materials like silk and eventually gauze.