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US 5,686,121 AGranted
Spinneret for producing a filament having a triangular cross-section and 3 or 6 axially extending voids
AssigneeE. I. Du Pont de Nemours and Company
InventorHarry Vaughn Samuelson
Life of this patent
Estimating the term…
Abstract
A spinneret plate for producing triangular; thermoplastic polymer filaments having 3 or 3 pair axially extending voids located along the convex sides of the filament.
Claims6
A spinneret plate for producing a filament having a triangular cross section having three convex sides, the spinneret plate having at least one filament forming group of apertures, said group having
- (a) a central "Y"-shaped aperture formed of three substantially equal length legs, each leg being angularly spaced from the other legs by an angle of about one hundred twenty degrees, each leg having a first and a second end, the first end of each of the legs being joined at a junction point, and
- (b) three peripheral slot apertures, each peripheral slot aperture having a first and a second end thereon, each end of each peripheral slot aperture being located adjacent to the second end of one of the legs of the central "Y"-shaped aperture,
- the second end of each leg of the central "Y"-shaped aperture lying radially beyond each of the peripheral slot apertures located adjacent thereto.
Dependencies are inferred from the claim text.