Method and machine for producing pipe cleaners
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Mar 17, 1981
Grant Date -
N/A
app pub date -
Jul 27, 1979
filing date -
Jul 27, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The method and apparatus for producing pipe cleaners each of which comprises two wires which have been twisted into interlocking spirals with fiber elements clamped between the wires. Two primary wires pass through a spinning head and three continuous strands of fibers are wound into spirals covering the wires. Holding wires are passed against the spiral strands upon opposite sides as the entire assembly moves between a pair of pulleys. As the assembly emerges, the fibers are cut diametrically of the spirals to form two continuous rows of fiber elements. Each row is clamped to its adjacent primary wire by a holding wire thus to form a workpiece. Each workpiece passes through a transfer assembly in which the row of fiber elements is clamped to a pulley by one of the wires while the other wire passes along a free loop around pulley and thence back to the row of fiber elements in the wire holding them. The downstream end of the workpiece is twisted and held taut as it passes from the pulley so that the two wires are twisted into spirals as they pass from the pulley.
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