Multi-layered hollow coil, and an apparatus and method of manufa

Details Multi-layered hollow coil, and an apparatus and method of manufa Multi-layered hollow coil, and an apparatus and method of manufa

1985-11-08

1987-05-26

Kittle, John E.

Stock material or miscellaneous articles

All metal or with adjacent metals

Honeycomb, or with grain orientation or elongated elements...

428 35, 428 36, 242 703, 29605, 156173, 156175, B21D 3900, H01B 1300, B65H 8100

Patent

active

046685448

ABSTRACT:
Multi-layered hollow coil and apparatus and method of manufacturing thereof disclosed which includes a first regularly wound first portion of a coil due to a wire from a wire source by rotation of a coil metrix on a rotatable axle and subsequently spirally wound second portion due to a wire accumulated on a winding roller by reverse rotation of the coil matrix which is disposed between two flanges. In the first wound portion of multi-layers, layers in odd numbers are wound N times and other layers in even numbers are wound N-1 times, and the layers excepted a first layers are wound between crests of windings of the lower layer. The first wound portion is pressed between the flanges by a movable flange thereof and electrically melt. After united the first wound portion, the coil matrix is reversely rotated and the second wound portion is spirally wound adjacent to a side surface of the first wound portion, and both portions are pressed by the flanges and melt with one body of the coil which is removed from the coil matrix.

REFERENCES:
patent: 4235656 (1980-11-01), Shimada et al.
patent: 4336475 (1982-06-01), Morinaga et al.
patent: 4355459 (1982-10-01), Takahashi et al.
patent: 4496927 (1985-01-01), Inoue

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