High-production method and apparatus for making spiral convoluti

Details High-production method and apparatus for making spiral convoluti High-production method and apparatus for making spiral convoluti

1978-06-26

1980-01-22

Combs, Ervin M.

Metal deforming

By deflecting successively-presented portions of work during...

With cutting of work or product

72148, B21C 4706

Patent

active

041843509

ABSTRACT:
A high production method and apparatus which utilizes ribbon-like resistance wire to produce spiral wound electrical heating coils as used in cigar lighters, ignitor plugs and the like. Nesting of adjoining convolutions, if desired, can be effected by first imparting a transverse, ribbed configuration to the ribbon prior to the winding of the same into the spiral coil. In accomplishing this transverse configuring, cooperable male and female rolls, turning in opposite directions, form the ribbon and simultaneously cut it into lengths at a high production rate. After an annealing process, the cut strips of ribbon are fed to a coiling machine which has a notched arbor that receives end portions of the strips and coils the latter into a spiral shape while restraint is imposed on the strips. The feeding, confining, winding and ejection procedures involving the strips are automatically, sequentially carried out at a high production rate.

REFERENCES:
patent: 249871 (1881-11-01), Baker
patent: 323100 (1885-07-01), Baker
patent: 2475856 (1949-07-01), Price
patent: 2579858 (1951-12-01), Price
patent: 2721952 (1955-10-01), Kenyon
patent: 3283399 (1966-11-01), Hart et al.
patent: 3346938 (1967-10-01), Becker
patent: 3905090 (1975-09-01), Painter
"Winding of Metal Evaporator Charge Coils," Anderson et al., Western Electric Technical Digest No. 45, Jan. 1977, pp. 1 & 2.

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