Patent US4999080A successfully refreshed from Google Patents.
US4999080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing a nonwoven fabric from continuous filaments
Assignee: Corovin GmbH
•
Filing: 1989-05-26
•
Granted: 1991-03-12
•
Expires: 2009-05-26
Abstract
Abstract An apparatus for producing a nonwoven fabric from continuous filaments, which are drawn off at a high speed in the form of a tow, under the influence of a gaseous propellant, from spinnerets of spinning plates of a spinning beam and after passing through a filament draw-off apparatus are laid down by means of a delivery apparatus, embodied as a spreader, on a delivery belt moving in the production direction. In the production direction, two spinning beams are disposed spaced apart from one another, and at least one spinning beam is rotatable, together with the delivery and spreading apparatus, in a plane extending parallel to the delivery belt. A varied pattern of laying down of the nonwoven fabric, or a new nonwoven product, can thus be produced during ongoing operation.
Inventors
- 👤 Heinz-H. Boich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:21
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/02; D04H3/05; D04H3/005; D04H3/03; D04H3/08; D04H3/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
151 words
An apparatus for producing a nonwoven fabric from continuous filaments comprising: (a) a delivery belt (28) moving in a production direction (30); (b) first and second spinning beams (12, 14) provided spaced apart form one another in the production direction (30), each spinning beam comprising a spinning plate having spinnerets and further comprising a filament draw-off apparatus (24) and a delivery apparatus (26) embodied as a spreader, at least one of said spinning beam (12, 14) together with the delivery apparatus (26), being rotatable (56, 58) in a plane extending parallel to the delivery belt; whereby continuous filaments are drawn off under an influence of a gaseous propellant at high speed in a form of a tow (50) from said spinnerets and after passing through said filament draw-off device apparatus (24) are laid down by means of said delivery apparatus (26) on said delivery belt (28) for forming a nonwoven fabric.
Claim 2
Independent Claim
151 words
An apparatus for producing a nonwoven fabric from continuous filaments comprising: (a) a delivery belt (28) moving in a production direction (30); (b) first and second spinning beams (12, 14) provided spaced apart form one another in the production direction (30), each spinning beam comprising a spinning plate having spinnerets and further comprising a filament draw-off apparatus (24) and a delivery apparatus (26) embodied as a spreader, at least one of said spinning beam (12, 14) together with the delivery apparatus (26), being rotatable (56, 58) in a plane extending parallel to the delivery belt; whereby continuous filaments are drawn off under an influence of a gaseous propellant at high speed in a form of a tow (50) from said spinnerets and after passing through said filament draw-off device apparatus (24) are laid down by means of said delivery apparatus (26) on said delivery belt (28) for forming a nonwoven fabric.
Claim 3
Dependent Claim
25 words
An apparatus as defined by claim 1, characterized in that said at least one spinning beam (12, 14) is rotatable by an angle of 45°.
Claim 4
Dependent Claim
67 words
An apparatus as defined by claim 2, characterized in that at least two spinning beams (12, 14) having longitudinal axes (32) together with the delivery apparatus are rotatable in a plane extending parallel to the delivery belt and that a direction of rotation of the spinning beams (12, 14) is selected such that the longitudinal axes (32) in respective end positions form a maximum angle of 90°.
Claim 5
Dependent Claim
35 words
An apparatus as defined by claim 3, characterized in that said at least two spinning beams (12, 14) having outer ends are supported on their outer ends on guide rails (44) extending in a circle.
Claim 6
Dependent Claim
36 words
An apparatus as defined by claim 2, characterized in that said at least one spinning beam (12, 14) is rotatable about a central axis (34) located in a middle portion of said at least one beam.
Claim 7
Dependent Claim
27 words
An apparatus as defined by claim 5, characterized in that said at least one spinning beam 12, 14) can be locked in desired rotational or angular positions.
Claim 8
Dependent Claim
31 words
The apparatus as defined by claim 1, wherein each of said first and second spinning beams (12, 14) is rotatable (56, 58) in a plane extending parallel to the delivery belt.
Claim 9
Dependent Claim
22 words
The apparatus as defined by claim 7, wherein each of said spreaders functions to attain a predetermined delivery direction of the filaments.
Claim 10
Dependent Claim
21 words
The apparatus as defined by claim 8, wherein said predetermined delivery direction is substantially 90° with respect to the spinning beam.
Claim 11
Dependent Claim
32 words
The apparatus as defined by claim 7, wherein each of said first and second spinning beams is rotatable about a central axis (34) located in a middle portion of the spinning beam.
References Cited (Backward Citations)
US3010865A
Cited
US3051602A
Cited
US3565729A
Cited
FR1347178A
Cited
US3379811A
Cited
US3459613A
Cited
US3526557A
Cited
US3579403A
Cited
US3720361A
Cited
US3929542A
Cited
DE2163795A1
Cited
US4496508A
Cited
US4753698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-11 | 1994-09-10 | 1995-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-11 | 1998-09-10 | 1999-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-11 | 2002-09-10 | 2003-03-12 | $7700.00 | Window Closed / Lapsed |