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US 4,067,441 AGranted
Coil of flexible material with inserts in outer wall
AssigneeWindings, Inc.
InventorsJames W. Newman, Ronald E. Zajac
Life of this patent
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AssigneeWindings, Inc.
InventorsJames W. Newman, Ronald E. Zajac
Estimating the term…
In a coil of material wound in a series of figure-8 coils with the crossovers progressing around the package but being interrupted at one point to provide a radial opening into the axial opening of the coil, in order to produce a thick-walled coil the material is first wound in a normal way with varying gains in order to produce a set of dense inner layers, while the outer layers are wound without variation in the gain to produce a honeycomb structure. The honeycomb section is of greater width (axially of the package) than the inner layers. A plurality of pins slidably mounted on a strip are pushed into the outside of the package through the openings in the honeycomb, whereafter the outer layers are compressed axially while retaining the pins within the outer layers. The pins permit payoff of the outer layers without danger of their collapsing and thereby forming kinks or twists within the package.
A method of forming a coil of flexible material comprising a plurality of figure-8s with the cross-overs of the figure-8s progressing around the periphery of the coil and having a radial hole and an axial opening, and with the radial hole extending from the periphery of the coil to the axial opening of the coil, which comprises winding a plurality of layers with the gains varying from layer to layer, thereby producing a relatively dense central section, and winding an outer section of the coil with the gains substantially equal from layer to layer, thereby producing a wider portion having a substantially honeycomb nature, inserting a plurality of pins through the outside face of the coil into the outer section thereof, and compressing the outer section axially to a dimension substantially equal to the dimension of the inner section.
A coil of flexible material wound in a plurality of figure-8s having their cross-overs progressing around the coil in each layer and having a radial opening extending from the outside into an axial opening of the coil, the coil having a wall thickness substantially greater than the radius of said axial opening, and having a plurality of pins spaced from each other extending from the outer surface of the coil into the outer layers thereof, said pins being spaced in a direction substantially parallel to the axis of said axial opening.
Dependencies are inferred from the claim text.