Conduit-making apparatus with a multiple diameter winding drum
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United States of America Patent
Stats
-
Apr 3, 2001
Grant Date -
N/A
app pub date -
Feb 23, 1999
filing date -
Feb 23, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus is disclosed for making a conduit or pipe. An extruder is provided for producing a strip of continuous thermoplastic. A winding drum receives the strip and helically winds the strip around the drum's perimeter to form a conduit having an inner diameter corresponding to the outer diameter of the drum. The drum includes a core tube surrounded by a plurality of rollers which define the outer diameter of the drum. The rollers rotate to advance the strip around the drum. A pair of detachable plates are provided for supporting said rollers. Each plate has a plurality of support structures for receiving and removably supporting each of said rollers at either end, at a desired radial distance from the drum axis, in order to define the drum diameter. The pair of plates is part of a plurality of pairs of plates, with each pair being of a different diameter to manufacture pipe or conduit of a variety of different diameters.
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