Patent US3860370A successfully refreshed from Google Patents.
US3860370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the manufacture of fibers
Assignee: Forbo Holding AG
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Filing: 1973-06-15
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Granted: 1975-01-14
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Expires: 1993-06-15
Abstract
Abstract An apparatus for the manufacture of fibres formed by stretching apart and cooling a thermoplastic material heated to at least its melting temperature, said apparatus comprising webs running over supports and forming between them a gap into which the heated thermoplastic material is fed and the width of which increases from the feeding end of the gap in the direction of movement of the thermoplastic material, the width at the feeding end of the gap being defined by means of a pair of supports which are adjustable in relation to each other, wherein the gap increase being defined by means of at least one pair of means which are adjustable as to their distance relative each other and which are provided with at least partly perforated support surfaces for the webs running across them.
Inventors
- 👤 Peter Robert Fanto-Kuertoes
- 👤 Ralf Stellan Marek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:54
CPC Classifications
D; D01; D01D; D01D5/00; B; B29; B29C; B29C59/00; B29C59/02; B29C59/022; B29C59/025
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
190 words
An apparatus for the manufacture of fibres formed by stretching apart and cooling a thermoplastic material heated to at least its melting temperature, said apparatus comprising webs running over supports and forming between them a gap into which the heated thermoplastic material is fed and the width of which increases from the feeding end of the gap in the direction of movement of the thermoplastic material, the width at the feeding end of the gap being defined by means of a pair of supports which are adjustable in relation to each other, the gap increase being defined by means of at least one pair of means which are adjustable as to their distance relative to each other and which are provided with at least partly perforated support surfaces for the webs running across them, means for exhausting a gaseous medium through the perforated support surfaces, means for the blowing of a gaseous medium through the perforated support surfaces, said means for the suction and blowing are arranged under the perforated support surfaces in optional mutual order to obtain defined temperature and stretching conditions at the deformation of the thermoplastic material.
Claim 2
Independent Claim
190 words
An apparatus for the manufacture of fibres formed by stretching apart and cooling a thermoplastic material heated to at least its melting temperature, said apparatus comprising webs running over supports and forming between them a gap into which the heated thermoplastic material is fed and the width of which increases from the feeding end of the gap in the direction of movement of the thermoplastic material, the width at the feeding end of the gap being defined by means of a pair of supports which are adjustable in relation to each other, the gap increase being defined by means of at least one pair of means which are adjustable as to their distance relative to each other and which are provided with at least partly perforated support surfaces for the webs running across them, means for exhausting a gaseous medium through the perforated support surfaces, means for the blowing of a gaseous medium through the perforated support surfaces, said means for the suction and blowing are arranged under the perforated support surfaces in optional mutual order to obtain defined temperature and stretching conditions at the deformation of the thermoplastic material.
Claim 3
Dependent Claim
62 words
The apparatus as claimed in claim 1, wherein said means defining the width increase of the gap and having the partly perforated support surfaces for the webs, comprise at least one pair of hollow rollers or drums, said means for suction and/or blowing of the gaseous medium being arranged in the interior of said rollers or drums optionally distributable along the circumference.
Claim 4
Dependent Claim
77 words
The apparatus as claimed in claim 1, wherein said means controlling the width increase of the gap and having at least partly perforated support surfaces for the webs, comprise at least one pair of hollow elements in the shape of collector shoes and housing in their interior the means for suction and/or blowing of gaseous medium, said means being optionally distributable along the inside of the perforated support surfaces in the direction of movement of the webs.
Claim 5
Dependent Claim
20 words
The apparatus as claimed in claim 1, further comprising means for heating and/or cooling the gaseous medium to be exhausted.
Claim 6
Dependent Claim
30 words
The apparatus as claimed in claim 1, further comprising means for cooling at least a part of the support surfaces of the means defining the gap increase for the webs.
Claim 7
Dependent Claim
35 words
The apparatus as claimed in claim 1, wherein the webs comprise a net, a perforated foil or the like of a material releasing the thermoplastic material, stretched apart to form the fibres, on sufficient cooling.
Claim 8
Dependent Claim
30 words
The apparatus as claimed in claim 1, wherein the webs are chosen to be incorporated as a carrier for the fibres formed at the stretching apart of the thermoplastic material.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |