In 1917, Richard A. Greene and William G. Burns, assignors to Jabez Burns & Sons, New York, were granted patents in the United States on the Burns flexible-arm cooler (for roasted batches) providing full fan-suction to a cooler box at all points in its track travel.
In 1919, Joseph F. Smart, assignor to Landers, Frary & Clark, New Britain, Conn., was granted a United States patent on a percolator.
In 1919, Charles Morgan, assignor to the Arcade Manufacturing Co., Freeport, Ill., was granted a United States patent on an improved grinding mill.
In 1919, Edward F. Schnuck, assignor to Jabez Burns & Sons, New York, was granted a United States patent on an improvement for a gas coffee roaster. In 1920, he was granted a United States patent on an improved process of twice cutting coffee and removing the chaff after each cutting.
In 1920, Natale de Mattei, of Turin, Italy, was granted a United States patent on a rapid coffee-filtering machine.
In 1920, Frederick H. Muller, of Chicago, was granted a United States patent on "an art of making coffee," and on an improved apparatus for hotels and restaurants, which comprised a series of superposed metal containers, or cartridges, of ground coffee placed in a perforated bucket designed to rest in a coffee urn, the cartridges being lifted out as the boiling water poured on them sinks with the drawing off of the "decoction" at the faucet.
| The N.C.R.A. Home Coffee Mill | The Manthey-Zorn Rapid Coffee Infuser and Dispenser |
In 1920, Alfredo M. Salazar, of New York, was granted a United States patent on a coffee urn in which the coffee is made at the time of serving by using steam pressure to force the boiling water through ground coffee held in a cloth sack attached to the faucet.
In 1920, William H. Bruning, Evansville, Ind., was granted a United States patent on an improved French drip pot made of aluminum and provided with a vacuum jacket in the dripper section, and a hot-water jacket in the serving portion, to keep the beverage hot.
In 1921, the Manthey-Zorn Laboratories Co., of Cleveland, brought out a rapid coffee-infuser and dispenser employing in the infuser a centrifugal to make an extract in thirty-eight seconds, and designed to deliver a gallon of concentrated liquid, or coffee base, every three minutes. The dispenser automatically combines the coffee base with boiling water in a differential faucet in the proportion desired, usually one of base to four of water. The dispenser serves 600 cups per hour. An additional faucet may be added which will double the capacity.