| 摘要 |
A method and apparatus for chopping long unwound items like fiber, fiber strands, yarn, etc. The chopper has a backup roll, a blade roll and an idler roll. The improvements include one or both of a shield having an air jet at or near its upper end, the shield being upstream of the blade roll and spaced from the blade roll, a lower end of the shield being spaced from the working surface, the air jet communicating with a source of compressed air, to prevent a buildup of fuzz or chopped item(s) upstream of the blade roll, and a shield having an air jet at or near its upper end, the air jet being located close to the working surface and the shield angling or curving downward from a location spaced from the working surface beginning between about an 8 O'clock and a 10 o'clock position on the backup roll and transitioning generally downward ending at a location below and spaced from the idler roll to protect the idler roll from chopped item(s).
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