Metal deforming – By deflecting successively-presented portions of work during... – To form helical coil or tube
Patent
1977-09-12
1978-09-12
Larson, Lowell A.
Metal deforming
By deflecting successively-presented portions of work during...
To form helical coil or tube
140 3CA, B21F 2716
Patent
active
041127269
ABSTRACT:
A single continuous length of spring wire is formed into a continuous length spiral or helix which is subsequently folded into a wave configuration for establishing in row form, a plurality of individual spring coils disposed generally parallel one to another. Each coil in the row is connected at its opposite ends to adjacent coils by head or connector end sections. The head or connector end sections are then formed, preferably into a planar Z-shaped configuration such that the formed connector sections at the same ends of the coils are disposed in a common plane normal to the axes of the coils which they interconnect. During forming of the end sections or heads of the coils, each connector section is deformed from a looped three-dimensional attitude into the planar Z-shaped attitude by interengagement with novel forming pins and forming dies.
REFERENCES:
patent: 3188845 (1965-06-01), Gerstorfer
patent: 3472290 (1969-10-01), Sykes et al.
patent: 3476156 (1969-11-01), Simons
Adams Elvin E.
Wells Tom J.
Wentzek Horst F.
Zapletal Henry
Zugel Marty J.
Larson Lowell A.
Leggett & Platt Incorporated
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