US3645299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of foil ribbon fabrics and apparatus for carrying out this process
Assignee: Lenzing AG
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Filing: 1969-12-16
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Granted: 1972-02-29
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Expires: 1989-12-16
Abstract
Abstract The invention comprises a process and an apparatus for the production of foil ribbon fabrics, wherein the warp ribbons and the weft ribbons are interwoven on a weaving device, at least the warp ribbons being cut from monoaxially stretched foil stock. The stretching device and the cutting device immediately precede the weaving device so that the plurality of warp ribbons cut from the monoaxially stretched foil can be directly and immediately fed to the weaving device. During stretching of the foil certain conditions are maintained, such as a small stretching gap, preferably electrostatic adherence of the foil to the stretching rolls, and specific temperature control.
Inventors
- 👤 Josef Alfred Eichler
- 👤 Alfred Plammer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:20
CPC Classifications
D; D03; D03D; D03D25/00; Y; Y10; Y10S; Y10S264/00; Y10S264/47
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
153 words
In a process for producing foil ribbon fabrics, comprising cutting warp ribbons and weft ribbons from foil stock, feeding said warp and weft ribbons to a weaving device and interweaving said weft ribbons with said warp ribbons, the steps of passing at least the foil stock from which the warp ribbons are to be cut through a stretching gap formed between two stretching rolls mounted in closely spaced-apart relation to each other, monoaxially stretching the foil stock in said stretching gap at a ratio of 1:4 to 1:8 cutting the foil stock so stretched by means of knives over which the foil stock is drawn to form a plurality of parallel warp ribbons, and immediately and continuously feeding the warp ribbons so formed to said weaving device, the speed of said cutting of the foil stock being substantially the same as the speed of said feeding the warp ribbons to the weaving device.
Claim 2
Dependent Claim
153 words
In a process for producing foil ribbon fabrics, comprising cutting warp ribbons and weft ribbons from foil stock, feeding said warp and weft ribbons to a weaving device and interweaving said weft ribbons with said warp ribbons, the steps of passing at least the foil stock from which the warp ribbons are to be cut through a stretching gap formed between two stretching rolls mounted in closely spaced-apart relation to each other, monoaxially stretching the foil stock in said stretching gap at a ratio of 1:4 to 1:8 cutting the foil stock so stretched by means of knives over which the foil stock is drawn to form a plurality of parallel warp ribbons, and immediately and continuously feeding the warp ribbons so formed to said weaving device, the speed of said cutting of the foil stock being substantially the same as the speed of said feeding the warp ribbons to the weaving device.
Claim 3
Dependent Claim
20 words
The process set forth in claim 1 wherein both warp and weft ribbons are cut from monoaxially stretched foil stock.
Claim 4
Dependent Claim
33 words
The process set forth in claim 1 wherein said warp ribbons are cut from monoaxially stretched foil stock in at least two layers and are fed to said weaving device in superposed relationship.
Claim 5
Dependent Claim
152 words
In a process for producing foil ribbon fabrics, comprising cutting warp ribbons and weft ribbons from foil stock, continuously feeding said warp and weft ribbons to a weaving device and interweaving said weft ribbons with said warp ribbons, the steps of passing at least the foil stock from which the warp ribbons are to be cut through a stretching gap formed between a first stretching roll and a second stretching roll, said first and second stretching rolls mounted in closely spaced-apart relation to each other, electrostatically pinning the foil stock to said first and second stretching rolls, monaxially stretching the foil stock in said stretching gap at a ratio of 1:4 to 1:8 cutting the foil stock so stretched by means of knives over which the foil stock is drawn to form a plurality of parallel warp ribbons, and immediately and continuously feeding the warp ribbons so formed to said weaving device.
Claim 6
Dependent Claim
152 words
In a process for producing foil ribbon fabrics, comprising cutting warp ribbons and weft ribbons from foil stock, continuously feeding said warp and weft ribbons to a weaving device and interweaving said weft ribbons with said warp ribbons, the steps of passing at least the foil stock from which the warp ribbons are to be cut through a stretching gap formed between a first stretching roll and a second stretching roll, said first and second stretching rolls mounted in closely spaced-apart relation to each other, electrostatically pinning the foil stock to said first and second stretching rolls, monaxially stretching the foil stock in said stretching gap at a ratio of 1:4 to 1:8 cutting the foil stock so stretched by means of knives over which the foil stock is drawn to form a plurality of parallel warp ribbons, and immediately and continuously feeding the warp ribbons so formed to said weaving device.
Claim 7
Dependent Claim
46 words
The process set forth in claim 4 wherein the foil stock is electrostatically pinned to said first stretching roll by means of two electrodes spaced from the surface of said first stretching roll and emitting fields which overlap on the surface of said first stretching roll.
Claim 8
Dependent Claim
42 words
The process set forth in claim 4 wherein the foil stock is electrostatically pinned to said first stretching roll at a circumferential angle of between 90* and 180* and on said second stretching roll at a circumferential angle of at least 30*.
Claim 9
Dependent Claim
38 words
The process set forth in claim 4 further comprising the steps of heating the foil stock prior to stretching and maintaining the temperature of the foil stock during stretching between 2* and 5* C. below its melting point.
Claim 10
Dependent Claim
34 words
The process set forth in claim 4 further comprising the step of keeping the temperature of said second stretching roll between 2* to 5* C. higher than the temperature of said first stretching roll.
Claim 11
Dependent Claim
22 words
The process set forth in claim 4 further comprising the step of keeping the air surrounding the stretching rolls free from moisture.
Claim 12
Independent Claim
184 words
An apparatus for producing foil ribbon fabrics, comprising means for producing a flat thermoplastic foil, means for cutting said thermoplastic foil into a plurality of parallel foil ribbons, means for stretching said thermoplastic foil, said stretching means having a first stretching roll and a second stretching roll defining a stretching gap therebetween, means for weaving said parallel foil ribbons, and means for supplying the parallel foil ribbons to said weaving means to be used at least as warp ribbons, the improvement comprising the stretching means being arranged between said foil-producing means and said cutting means, said first stretching roll and said second stretching roll being mounted in closely spaced-apart relation to each other in said stretching means and being adapted to permit monoaxial stretching of said foil within said stretching gap at a ratio of 1:4 to 1:8, said supplying means adapted to immediately and continuously supply said parallel foil ribbons to said weaving means, and said supplying means adapted to draw the foil over the cutting means and to feed the parallel foil ribbons to the weaving means at substantially the same speed.
Claim 13
Independent Claim
184 words
An apparatus for producing foil ribbon fabrics, comprising means for producing a flat thermoplastic foil, means for cutting said thermoplastic foil into a plurality of parallel foil ribbons, means for stretching said thermoplastic foil, said stretching means having a first stretching roll and a second stretching roll defining a stretching gap therebetween, means for weaving said parallel foil ribbons, and means for supplying the parallel foil ribbons to said weaving means to be used at least as warp ribbons, the improvement comprising the stretching means being arranged between said foil-producing means and said cutting means, said first stretching roll and said second stretching roll being mounted in closely spaced-apart relation to each other in said stretching means and being adapted to permit monoaxial stretching of said foil within said stretching gap at a ratio of 1:4 to 1:8, said supplying means adapted to immediately and continuously supply said parallel foil ribbons to said weaving means, and said supplying means adapted to draw the foil over the cutting means and to feed the parallel foil ribbons to the weaving means at substantially the same speed.
Claim 14
Dependent Claim
23 words
The apparatus set forth in claim 10 wherein said first and second stretching rolls have a diameter of between 1.5 and 5 inches.
Claim 15
Dependent Claim
29 words
The apparatus set forth in claim 10 wherein said stretching gap has a width of less than 10 times the thickness of the flat thermoplastic foil prior to stretching.
Claim 16
Dependent Claim
30 words
The apparatus set forth in claim 10 wherein said stretching gap has a width of between 7.5 and 10 times the thickness of the flat thermoplastic foil prior to stretching.
Claim 17
Dependent Claim
54 words
The apparatus set forth in claim 10 further comprising electrostatic pinning means comprising two first electrodes spaced from the surface of said first stretching roll and a second electrode spaced from the surface of said second stretching roll, said two first electrodes emitting fields which overlap on the surface of said first stretching roll.
Claim 18
Dependent Claim
18 words
The apparatus set forth in claim 14 wherein said first electrodes and said second electrode are needle electrodes.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |