Apparatus and method for converting continuous tow fibers into a staple length
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United States of America Patent
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-
Mar 9, 1999
Grant Date -
N/A
app pub date -
Sep 11, 1997
filing date -
Apr 16, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method enables a synthetic fiber tow of indeterminate length passed through a break drawframe to be converted to relatively short spinnable staple length fibers in the form of sliver. During passing through the drawframe, a concentrated beam of energy, illustrated as being a laser beam is swept across the tow by a rotating mirror and in the course of doing so, effectively cuts the tow fibers where struck by the laser beam. In one embodiment the laser beam stays on while sweeping across the width of the tow and then repeats that cycle in a succeeding section of tow. In another embodiment, the laser beam is energized and deenergized as it transverses across one section of tow and in the next succeeding section of tow the laser beam is actuated in a different time cycle.
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