Apparatus and method for precision testing of fiber length using electrostatic collection and control of fibers
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United States of America Patent
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Apr 19, 2005
Grant Date -
Jul 22, 2004
app pub date -
Jan 21, 2003
filing date -
Jan 21, 2003
priority date (Note) -
Expired
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Abstract
A system for precision testing of fiber length and the like using electrostatic collection and control of fibers. The system comprises two spaced-apart and longitudinal extending electrode plates wherein one electrode plate has a positive charge and the other electrode plate is grounded or has a negative charge. An endless rotating belt extends between and parallel to the electrode plates, and the rotating belt is positioned next adjacent and in contact with or in close proximity to one of the two spaced-apart electrode plates such that the distance between the belt and the other electrode plate is greater than the length of fibers to be tested. A fiber introduction system is provided to introduce a plurality of individual fibers above the two electrode plates such that the fibers will adhere to the belt and the other ends of the fibers are attracted to the other electrode plate and thereby straightened. An imaging system is provided above the belt to generate image data corresponding to the length of individual fibers being transported by the rotating belt, and a data processor serves to analyze the image data to determine the length of fibers passing beneath the imaging system.
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