Patent US4155732A successfully refreshed from Google Patents.
US4155732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinnerette for making glass fibers
Assignee: Glaswerk Schuller GmbH
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Filing: 1978-05-15
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Granted: 1979-05-22
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Expires: 1998-05-15
Abstract
Abstract A spinnerette has an extrusion crucible provided with extrusion nozzles in its bottom wall, and a melting crucible atop the extrusion crucible. The melting crucible is bounded in longitudinal direction by walls having arcuately curved wall segments so that the interior of the melting crucible is composed of a plurality of generally cylindrical compartments which are arranged side by side in the longitudinal direction and which open into one another where they adjoin each other.
Inventors
- 👤 Fredo Schlachter
- 👤 Heinz Keib
- 👤 Dieter Kahnke
- 👤 Christian Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:13
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/08; C03B37/09; C03B37/091; C03B37/081
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
112 words
A spinnerette for producing filaments from thermoplastic material, comprising an elongated extrusion crucible having a bottom wall provided with a plurality of nozzles for extrusion of molten thermoplastic material; and an elongated melting crucible of electrically conductive material atop and communicating with said extrusion crucible and adapted to receive bodies of thermoplastic material for conversion into a thermoplastic melt, said melting crucible having a pair of opposite upstanding sidewalls each composed of a plurality of arcuate sections oppositely, located sections together bounding respective chambers of substantially cylindrical cross-section and adjoining ones of said chambers merging into one another so that the melting crucible has a continuous interior space over its entire length.
Claim 2
Dependent Claim
112 words
A spinnerette for producing filaments from thermoplastic material, comprising an elongated extrusion crucible having a bottom wall provided with a plurality of nozzles for extrusion of molten thermoplastic material; and an elongated melting crucible of electrically conductive material atop and communicating with said extrusion crucible and adapted to receive bodies of thermoplastic material for conversion into a thermoplastic melt, said melting crucible having a pair of opposite upstanding sidewalls each composed of a plurality of arcuate sections oppositely, located sections together bounding respective chambers of substantially cylindrical cross-section and adjoining ones of said chambers merging into one another so that the melting crucible has a continuous interior space over its entire length.
Claim 3
Dependent Claim
28 words
A spinnerette as defined in claim 1; and further comprising brace members connecting said sidewalls in the region where adjoining ones of said chambers merge into one another.
Claim 4
Dependent Claim
33 words
A spinnerette as defined in claim 2, said sidewalls each having an upper edge and a lower edge, and said brace members each extending only over part of the distance between said edges.
Claim 5
Dependent Claim
20 words
A spinnerette as defined in claim 3, wherein said brace members are provided in the region of said upper edges.
Claim 6
Dependent Claim
24 words
A spinnerette as defined in claim 1, wherein said chambers are of circular cross-section except in the regions where they merge into one another.
Claim 7
Dependent Claim
24 words
A spinnerette as defined in claim 1, wherein said chambers are of oval cross-section except in the regions where they merge into one another.
Claim 8
Dependent Claim
24 words
A spinnerette as defined in claim 1, wherein said chambers are of elliptical cross-section except in the regions where they merge with one another.
Claim 9
Dependent Claim
44 words
A spinnerette as defined in claim 1, wherein said sidewalls each have an upper portion and a lower portion and are provided with said arcuate sections only in the region of said upper portion but are planar in the region of said lower portion.
Claim 10
Dependent Claim
73 words
A spinnerette as defined in claim 1, wherein said sidewalls each have an upper portion and a lower portion, at least one of said portions being provided with said arcuate section, and the developed length of a first one of said portions being greater than the developed length of a second one of said portions so that said first portion offers greater resistance to the flow of electrical current than said second portion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |