US PATENT SUBCLASS 57 / 33
.~ Hollow rope machines

Current as of: June, 1999
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57 /   HD   TEXTILES: SPINNING, TWISTING, AND TWINING

1 R  DF  APPARATUS AND PROCESSES {45}
33.~ Hollow rope machines

DEFINITION

Classification: 57/33

Apparatus for forming hollow ropes or strands by twisting or twining operations. These machines usually involve twisting or twining of strands upon a hollow mandrel.