Rambold is considered the inventor of the modern tea bag with bicameral and several tea bag packing machines. He was since 1924 an employee of the German company teapot, first as a locksmith. In 1928, he developed the pompadour tea bag packing machine, which produced 35 tea bags per minute. In 1929 his first teapot tea bags made of tasteless special parchment paper on the market and marketed also specially developed by employees Rambold tea bag packing machine. In 1949 which in turn developed by Rambold " Constanta - Teepackmaschine " on the market. She could already produce 160 double chamber bags per minute. In sea bush, he founded a subsidiary of teapot that Teepack Special Machines GmbH.