William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 7363730 | Devices and method for removing broken pulp web from a pulp dryer and maintenance platform for a pulp dryer A device (21) and method for removing a broken pulp web (27) from a pulp dryer and a maintenance platform (23) comprising such a device. The device (21) comprises an actuator (31), a pulling means (33) functionally coupled t... | 04/29/2008 |
| 7065901 | Method and device for cooling a material web A method of cooling a material web includes, after drying a material web, moving the material web in a given direction on a meander-shaped web path over a cooling cylinder and at least one other cylinder disposed at a location selected from a group thereof consistin... | 06/27/2006 |
| 6996921 | Web positioning device A web positioning device includes one or more ports positioned in or adjacent at least one platen of a gap drying system, wherein upon generation of a vacuum force through each port, movement of a web of material conveyed through the gap drying system is arrested by... | 02/14/2006 |
| 5575085 | Apparatus and method for controlling the rotary airlocks in a coal processing system by reversing the motor current rotating the air lock An improvement to a coal processing system where hard materials found in the coal may cause jamming of either inflow or outflow rotary airlocks, each driven by a reversible motor. The instantaneous current used by the motor is continually monitored and co... | 11/19/1996 |
| 4668181 | Heating device and process for controlling the heating device for webs to be unwound from rolls A heater is provided for heating an unwound portion of a web supported at a holder on a rotatable roll. A first pair of rollers between the holder and heater pull the web from the roll. A second pair of rollers advance the web after it passes through the ... | 05/26/1987 |
| 4646446 | UV curing apparatus An apparatus for the ultraviolet irradiating printed ink on sheet at a UV curing station is provided with a cooling station immediately downstream of the UV curing station. Air knives at the cooling station increase the air velocity and cause a turbulent ... | 03/03/1987 |