High-production method and apparatus for making grooved resistan

Details High-production method and apparatus for making grooved resistan High-production method and apparatus for making grooved resistan

1978-05-22

1980-01-22

Combs, Ervin M.

Metal deforming

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

With cutting of work or product

72186, 72196, B21D 1704

Patent

active

041843517

ABSTRACT:
A high production method and apparatus by which flat, ribbon-like resistance wire stock is fed between male and female die rolls to produce ribbed or grooved strips which can be spiral wound into electrical heating coils of the type used in cigar lighters, ignitor plugs and the like. The ribbing or grooving of the ribbon enables the nesting of adjoining convolutions to be had. The imparting of the ribbed configuration to the ribbon is effected prior to the cutting and winding of the same into the spiral coil. In accomplishing this, cooperable male and female rolls, turning in opposite directions, engage opposite sides of, and rib the ribbon and thereafter cut it into lengths while it is still moving, this being done at a high production rate. After an annealing process, the cut strips of ribbon can be fed to a coiling machine which will coil them into a spiral shape. The feeding, confining, grooving and cutting procedures are automatically, sequentially and continuously carried out quickly and expeditiously.

REFERENCES:
patent: 255958 (1882-04-01), Evans
patent: 547750 (1895-10-01), Clennam
patent: 965311 (1910-07-01), MacMurray
patent: 966916 (1910-08-01), Higgin
patent: 1927791 (1933-09-01), Balfe
patent: 2083370 (1937-06-01), Greulich
patent: 3446049 (1969-05-01), Greis
patent: 3575027 (1971-04-01), Eisler
patent: 3896650 (1975-07-01), O'Konski

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