Process for making a coil
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United States of America Patent
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Jul 18, 1989
Grant Date -
N/A
app pub date -
May 12, 1987
filing date -
May 13, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process for making a coil having no bobbin comprises the steps of connecting one end of an electrical conductor to a coil making jig, rotating the jig to wind the electrical conductor thereon while applying a tension to the conductor as the coil is being formed, and removing the coil from the jig, the tension on outer windings of the coil being greater than that on inner windings thereof. Accordingly, the outer winding provides a high pressure against the inner winding such that a high friction is produced between the adjacent windings, whereby the windings of the coil do not subsequently separate from each other.
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