US3762850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinning head
Assignee: Akzona Inc
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Filing: 1971-07-26
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Granted: 1973-10-02
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Expires: 1991-07-26
Abstract
Abstract A spinning head in a melt spinning apparatus wherein a central conically shaped melt space between the upper cover or stem portion of the outer housing and the lower nozzle plate assembly contains a concavo-concave disk member arranged to provide a continuously narrowing flow path for the melt being received from a coaxial feed line and passing first outwardly and then inwardly, with reference to the spinning head axis, around the disk member to the nozzle plate assembly. This spinning head is especially adapted to handle synthetic linear fiber-forming polymer melts under high pressure, e.g., in spinning nylon filaments.
Inventors
- 👤 H Werner
- 👤 W Grimm
- 👤 H Linhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:18
CPC Classifications
D; D01; D01D; D01D4/00; D01D4/06; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; B29C48/25; B29C48/30; B29C48/345
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
137 words
In a melt spinning apparatus having a spinning head in which a cylindrical nozzle plate assembly is detachably connected to a coaxial feed line by an outer housing holder means including a cover member defining a space which expands conically from said feed line to said nozzle plate assembly, the improvement comprising a concavo-concave flow guide member centered in said space between said cover member and said nozzle plate assembly such that the upper surface of said flow guide member and the lower surface of the cover member define a melt flow path which narrows outwardly away from the spinning head axis and said feed line while the lower surface of said flow guide member and the upper surface of said nozzle plate assembly define a melt flow path which narrows inwardly toward the spinning head axis.
Claim 2
Dependent Claim
137 words
In a melt spinning apparatus having a spinning head in which a cylindrical nozzle plate assembly is detachably connected to a coaxial feed line by an outer housing holder means including a cover member defining a space which expands conically from said feed line to said nozzle plate assembly, the improvement comprising a concavo-concave flow guide member centered in said space between said cover member and said nozzle plate assembly such that the upper surface of said flow guide member and the lower surface of the cover member define a melt flow path which narrows outwardly away from the spinning head axis and said feed line while the lower surface of said flow guide member and the upper surface of said nozzle plate assembly define a melt flow path which narrows inwardly toward the spinning head axis.
Claim 3
Dependent Claim
33 words
A melt spinning apparatus as claimed in claim 1 wherein said nozzle plate assembly includes a distributor plate and a sieve pack mounted one over the other on top of the nozzle plate.
Claim 4
Dependent Claim
56 words
A melt spinning apparatus as claimed in claim 1 wherein said flow guide member is a disk-shaped body symmetrical about the spinning head axis and supported centrally of said space between said cover member and said nozzle plate assembly by a plurality of widely spaced leg members at points around the periphery of said disk-shaped body.
Claim 5
Dependent Claim
33 words
A melt spinning apparatus as claimed in claim 3 wherein said disk-shaped body has a rounded outer peripheral edge with the radius of curvature of said edge being approximately 2 to 5 mm.
Claim 6
Dependent Claim
30 words
A melt spinning apparatus as claimed in claim 1 wherein said flow guide member is composed of a rustproof and acid resistant steel with polished upper and lower concave surfaces.
Claim 7
Dependent Claim
62 words
A melt spinning apparatus as claimed in claim 1 wherein the upper surface of said flow guide member has a central gradually curved portion extending inwardly toward the axis of the spinning head and upwardly into said feed line while the oppositely disposed lower surface of said cover member has a correspondingly gradually curved annular portion flaring outwardly from said feed line.
Claim 8
Dependent Claim
42 words
A melt spinning apparatus as claimed in claim 6 wherein said central gradually curved extension together with the concave upper and lower portions of said flow guide member provide an integral outer disk-shaped surface composed of a polished, rustproof and acid-resistant steel.
Claim 9
Dependent Claim
50 words
A melt spinning apparatus as claimed in claim 1 wherein said flow guide member is a disk-shaped body with a conically curved extension on its upper concave surface and with rounded outer peripheral edges, said cover member being correspondingly curved in an annular conical section extending into the feed line.
Claim 10
Dependent Claim
45 words
A melt spinning apparatus as claimed in claim 8 wherein an annular flow guide ring is positioned below and adjacent the outer periphery of said disk-shaped body to provide a smooth and substantially uninterrupted annular flow path around the outer edge of said disk-shaped body.
Claim 11
Dependent Claim
36 words
A melt spinning apparatus as claimed in claim 9 wherein said disk-shaped body is centrally supported in the melt space by leg members bridging the annular flow path around the outer edge of said disk-shaped body.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |