Apparatus for measuring the density of a tobacco stream
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United States of America Patent
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-
Jul 17, 1990
Grant Date -
N/A
app pub date -
Jul 28, 1988
filing date -
Jul 31, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The density of a tobacco stream which is advanced by a foraminous conveyor toward the surplus removing station of a cigarette rod making machine is measured by one or more detectors each having one or more sources of infrared light and one or more photoelectric transducers. In order to avoid the generation of distorted signals in response to impingement of high-intensity radiation upon the transducer or transducers, each transducer is out of line with the path of direct propagation of radiation from the respective source or sources toward successive increments of the tobacco stream. The transducer or transducers receive infrared light which is scattered in and/or reflected by tobacco particles in the stream. Signals from the transducer or transducers are used to regulate the quantity of surplus which is removed from the stream.
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