Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Reexamination Certificate
2006-12-05
2006-12-05
Porta, David (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
Reexamination Certificate
active
07145145
ABSTRACT:
The invention is concerned with a material processing apparatus, e.g. a dryer such as a fluid bed dryer, for processing material, e.g. pharmaceuticals, in a compartment (12) having a wall (10). The wall has a window for transmitting radiation from an infrared spectrometer (30) into the dryer and for transmitting radiation from the material to the spectrometer. The spectrometer (30) can analyze the radiation transmitted from the material to measure a property of the material within the compartment, e.g. its moisture content. The radiation-transmitting element (28) is present in a moveable body (24), e.g. a sphere, that can be moved to bring the element (28) into a second position (31) in which the element is in contact with a duct (40) through which fluid can be passed to clean the element (28). In addition, a wiper member (34) may be provided that wipes the element (28) as it passes over it as the moveable body (26) is moved into the second position.
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Andrus Sceales Starke & Sawall LLP
NDC Infrared Engineering, Ltd.
Porta David
Webb Christopher
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