Textiles: spinning – twisting – and twining – Apparatus and processes – Covering or wrapping
Patent
1978-07-24
1980-03-11
Petrakes, John
Textiles: spinning, twisting, and twining
Apparatus and processes
Covering or wrapping
B65H 8108
Patent
active
041921267
ABSTRACT:
A machine is provided for coiling wire about a core filament, particularly for producing heat exchanger coils. The machine comprises a main frame, two coiling elements spaced from each other and mounted in the frame for rotation about substantially the same axis, a hollow mandrel on which the wire is to be coiled, the longitudinal axis of the mandrel substantially coinciding with said axis, and a wire guide on each of the coiling elements spaced from the said axis whereby a loop of wire may be formed with its ends substantially on the said axis and the remainder thereof spaced from the said axis. The machine further comprises means for rotating the two coiling elements in a substantially synchronous fashion so that wire guided about the elements is coiled on to the mandrel, means for preventing the mandrel from rotating relative to the frame, and means for feeding a core filament through the hollow mandrel. The mandrel carries a plurality of pins around which coils of wire are formed, the mandrel having a tapering portion up which a coil in the process of being formed sides and thereby pushes off from the pins a previously formed coil.
REFERENCES:
patent: 443491 (1890-12-01), Ball
patent: 2258139 (1941-10-01), Johnston, Jr.
patent: 2463689 (1949-03-01), Greenwood
patent: 2882673 (1959-04-01), Buddecke
patent: 2993332 (1961-07-01), Hughes
patent: 3732679 (1973-05-01), Sohr
patent: 4041683 (1977-08-01), Heimlicher
Fields Paul
Petrakes John
Skemmill Limited
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