Title: Coiling machine

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.

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Inventors: Nolan, John P. S. (Northwood, GB)

Application Number: 927148
Filing Date: 1978-07-24
Publication_date: 1980-03-11
Assignee: Skemmill Limited (London, GB2)
Primary Class(es): 57/3
Other Classes:
US Patent Ref:

443491	Dec, 1890	Ball	57/58.
2258139	Oct, 1941	Johnsto, Jr.	57/3.
2463689	Mar, 1949	Greenwood	57/3.
2882673	Apr, 1959	Buddecke	57/3.
2993332	Jul, 1961	Hughes	57/3.
3732679	May, 1973	Sohr	57/18.
4041683	Aug, 1977	Heimlicher	57/18.

Other Refs: 1011699

Dec, 1965	GB.

Primary Examiner: Petrakes, John
Assistant Examiner:
Attorney: Fields; Paul