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US 4,290,993 AGranted
Method and apparatus for making nodule filament fibers
AssigneeBattelle Development Corporation
InventorRobert E. Maringer
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AssigneeBattelle Development Corporation
InventorRobert E. Maringer
Estimating the term…
A method for producing "dogbone" filament fibers having nodules at each end comprising rotating a heat extracting disk having an edge tapering to a narrow peripheral surface and having the peripheral surface notched at intervals with each notch comprising a leading edge, connected to a trailing flat surface, the trailing flat surface supporting an expanded land on the peripheral edge; introducing the rotating disk into the surface of a pool of molten material to form a film of the material on the edge; and removing heat from the film and at least partially solidifying the film on the edge. By the method, the segmented filament fiber products which are produced have a nodule formed on the leading end, a nodule formed on the trailing end, and continuous fiber inbetween, with the general appearance of a dogbone.
In the method of producing filament fibers by rotating a heat extracting disk having an edge tapering to a narrow peripheral surface and having the peripheral surface indented at intervals, followed by introducing the rotating disk into the surface of a pool of molten material to form a film on the edge segments between indentations, and removing heat from the film while at least partially solidifying the film on the edge segments, the improvement comprising introducing a widened portion of the tapered edge segment at the leading surface of the indentations into the surface of the molten material followed by introducing a narrowed portion of the edge segment into the surface of the molten material, and then introducing a second widened portion of the tapered edge segment into the molten material as the edge is withdrawn from the molten material.
In an apparatus for the production of filament fibers having a substantially uniform cross section in a central portion and enlarged nodules at the ends thereof, from molten material, comprising:
Dependencies are inferred from the claim text.