US4396366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the production of a multicomponent yarn composed of at least two synthetic polymer components
Assignee: Akzona Inc
•
Filing: 1982-09-20
•
Granted: 1983-08-02
•
Expires: 2002-09-20
Abstract
Abstract A multi-component filament consisting of at least two polymer components and having a cross-section in which a matrix component separates several peripherally arranged segments of one or more segment components from each other, and a process for the production of such matrix/segment filaments, wherein the segment component is injected into the matrix component and fed to the spinneret opening in a combined stream with a plurality of segment components separated by the matrix. The multicomponent filament can be drawn to obtain individual microfilaments of less than 1 dtex after splitting, e.g. by false twist texturing.
Inventors
- 👤 Erich Kessler
- 👤 Peter Birken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:26
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/14; D01D; D01D5/00; D01D5/28; D01D5/30; D01D5/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
193 words
Spinning apparatus for making a multi-component filament comprising a spinneret back plate having first transverse boreholes therein, a spinneret front plate having second transverse boreholes aligned with said first transverse boreholes in said back plate, a spinning orifice aligned with each of said second boreholes and adjacent thereto; a feed element for a matrix polymer component extending through each of said first and second boreholes, said feed elements each having a central duct, coaxial with said first and second boreholes, to supply said matrix polymer component to said spinning orifices, at least one feed channel and at least one distribution chamber for at least one other polymer component, each of said distribution chambers being connected to said central duct by a plurality of radial passages through the wall of said feed element, said feed elements having a zone intermediate the ends of said feed elements having a smaller diameter than the diameter of said first and second boreholes and having in said zone said radial passages for the said other polymer component and said radial passages lying in at least two planes perpendicular to the direction of the axis of said central duct.
Claim 2
Dependent Claim
193 words
Spinning apparatus for making a multi-component filament comprising a spinneret back plate having first transverse boreholes therein, a spinneret front plate having second transverse boreholes aligned with said first transverse boreholes in said back plate, a spinning orifice aligned with each of said second boreholes and adjacent thereto; a feed element for a matrix polymer component extending through each of said first and second boreholes, said feed elements each having a central duct, coaxial with said first and second boreholes, to supply said matrix polymer component to said spinning orifices, at least one feed channel and at least one distribution chamber for at least one other polymer component, each of said distribution chambers being connected to said central duct by a plurality of radial passages through the wall of said feed element, said feed elements having a zone intermediate the ends of said feed elements having a smaller diameter than the diameter of said first and second boreholes and having in said zone said radial passages for the said other polymer component and said radial passages lying in at least two planes perpendicular to the direction of the axis of said central duct.
Claim 3
Dependent Claim
36 words
The apparatus of claim 1 wherein at least one of said passages consists of small tube through said feed elements having an outlet in the interior of said axial duct and spaced from the wall thereof.
Claim 4
Dependent Claim
26 words
The apparatus of claim 2, wherein said outlets in the interior of said axial duct are at different distances from the axis of said axial hole.
References Cited (Backward Citations)
US2464301A
Cited
US2508462A
Cited
GB733007A
Cited
US3016599A
Cited
US2856638A
Cited
US3382305A
Cited
US2987797A
Cited
US3062702A
Cited
US3099067A
Cited
US3350488A
Cited
US2999788A
Cited
US3195865A
Cited
US3117906A
Cited
GB1016861A
Cited
GB1104694A
Cited
US3418200A
Cited
US3286992A
Cited
US3531368A
Cited
US3540080A
Cited
GB1167390A
Cited
US3453689A
Cited
US3559591A
Cited
US3729449A
Cited
US3814561A
Cited
US3692423A
Cited
US3853977A
Cited
US3865678B1
Cited
US3865678A
Cited
US3917784A
Cited
DE2250496A1
Cited
US3966865A
Cited
US4035441A
Cited
US3973905A
Cited
US4073988A
Cited
US4165556A
Cited
US4051287A
Cited
US4109038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |