CPC A61J 3/005 (2013.01) [A61K 9/2893 (2013.01); B05B 12/12 (2013.01); B05B 16/60 (2018.02); B05D 3/0486 (2013.01); F24F 6/18 (2013.01); F24F 13/04 (2013.01); F24F 13/08 (2013.01); A61J 3/06 (2013.01); B05B 13/0257 (2013.01)] | 14 Claims |
1. A method of supplying a humid air flow to a pan coater of a tablet coating system, the method comprising:
providing the pan coater to apply one or more coatings to a tablet;
providing a recirculating air handler operably connected to the pan coater, the recirculating air handler comprising:
an inlet duct operable to receive exhaust air from the pan coater;
a humidifier to introduce moisture into the exhaust air in an amount resulting in an exit air having a relative humidity of up to about 94%;
a vent operable to release air from the recirculating air handler to the atmosphere via a vent valve, wherein the vent valve is opened as needed to maintain a pressure within the pan coater of at least 0.15 inches of water column below atmospheric pressure; and
an exit duct operable to deliver the exit air to the pan coater;
one or more configurable valves; and
a control system comprising a mode control operable to coordinate opening and closing of the one or more configurable valves to switch an air supply of the pan coater from a flow-through air handler to the recirculating air handler.
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