US4399671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Green-house curtain
Assignee: Ludvig Svensson Holland BV
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Filing: 1980-11-04
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Granted: 1983-08-23
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Expires: 2000-11-04
Abstract
Abstract A rollable and drapeable green-house curtain with insulating power. The curtain comprises double fabric layers separated along their entire length and width and interconnected by means of a plurality of thin and flexible threads sparsely distributed over the surface of the curtain. In the intervals between rows of connecting threads there could be arranged strips of a heat reflecting material, e.g. metallized foil, in order to make the curtain an effective barrier against radiant heat. The curtain is manufactured on a warp knitting machine with two needle bars and the connecting threads consist of connecting stitches between the double fabric paths.
Inventors
- 👤 Goran Henningsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:02
CPC Classifications
A; A01; A01G; A01G9/00; A01G9/14; A01G9/1438; D; D04; D04B; D04B21/00; D04B21/14; A01G2009/1453; A01G2009/1461; D10; D10B; D10B2403/00; D10B2403/02; D10B2403/024; D10B2403/0243; D10B2503/00; D10B2503/02; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/25
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
100 words
A rollable and drapeable green-house curtain comprising: at least two fabric layers arranged in superposed spaced apart relation to the next adjacent layer and forming an air space therebetween; a plurality of connecting members each comprised of at least one thin, flexible plastic thread each end of which being provided with cross locking members, said thread extending between and connected at the opposed ends thereof to each superposed adjacent fabric layer, said connecting members being distributed over substantially the entire inner surfaces of the fabric layers and spaced apart by a distance greater than the lengths of said connecting members.
Claim 2
Dependent Claim
100 words
A rollable and drapeable green-house curtain comprising: at least two fabric layers arranged in superposed spaced apart relation to the next adjacent layer and forming an air space therebetween; a plurality of connecting members each comprised of at least one thin, flexible plastic thread each end of which being provided with cross locking members, said thread extending between and connected at the opposed ends thereof to each superposed adjacent fabric layer, said connecting members being distributed over substantially the entire inner surfaces of the fabric layers and spaced apart by a distance greater than the lengths of said connecting members.
Claim 3
Dependent Claim
50 words
A green-house curtain according to claim 1, wherein the fabric layers consist of a knitted fabric of a textile water-transmitting material manufactured by a warp knitting machine with two needle bars and that the connecting members consist of cross connections in the form of connecting stitches between the fabrics layers.
Claim 4
Dependent Claim
25 words
A green-house curtain according to claim 1, wherein the curtain along at least one side edge is provided with a means for receiving a rod.
Claim 5
Dependent Claim
31 words
A green-house curtain according to claim 1, wherein said threads pass through both fabric layers so that the cross locking members are located at the remote surfaces of the fabric layers.
Claim 6
Dependent Claim
57 words
A green-house curtain according to claim 1, wherein each fabric layer comprises longitudinal zones of alternating narrow mesh fabric and wide mesh fabric, the fabric layers being so arranged relative to each other that narrow mesh fabric zones in one fabric layer are disposed in superposed relation to wide mesh fabric zones in an adjacent fabric layer.
Claim 7
Dependent Claim
35 words
A green-house curtain according to claim 5, wherein the narrow mesh fabric zones are broader than the wide mesh fabric zones, and the connecting threads are arranged between opposing portions of narrow mesh fabric zones.
Claim 8
Dependent Claim
14 words
The greenhouse curtain according to claim 3, wherein said receiving means comprises a channel.
Claim 9
Dependent Claim
14 words
The greenhouse curtain according to claim 3, wherein said receiving means comprises a hem.
Claim 10
Dependent Claim
16 words
The greenhouse curtain according to claim 3, wherein aid receiving means comprises a plurality of perforations.
Claim 11
Dependent Claim
15 words
The greenhouse curtain according to claim 1, wherein the number of fabric layers is two.
Claim 12
Dependent Claim
97 words
A double or multiple rollable and drapeable green-house curtain, the fabric layers of which are separated along their entire length and width but are interconnected by means of connecting members forming an air space therebetween, each connecting member consisting of at least one thin and flexible thread extending between the fabric layers, said threads being sparsely distributed over substantially the whole surface of the curtain, so that opposing surfaces of the fabric layers can be brought together in close contact with each other, and between the fabric layers there is arranged at least one heat reflecting layer.
Claim 13
Dependent Claim
97 words
A double or multiple rollable and drapeable green-house curtain, the fabric layers of which are separated along their entire length and width but are interconnected by means of connecting members forming an air space therebetween, each connecting member consisting of at least one thin and flexible thread extending between the fabric layers, said threads being sparsely distributed over substantially the whole surface of the curtain, so that opposing surfaces of the fabric layers can be brought together in close contact with each other, and between the fabric layers there is arranged at least one heat reflecting layer.
Claim 14
Dependent Claim
95 words
A rollable and drapeable greenhouse curtain comprising: at least two fabric layers arranged in superposed spaced apart relation to the next adjacent layer and forming an air space therebetween; a plurality of connecting members each comprised of at least one thin, flexible thread extending between and connected at the opposed ends thereof to each superposed adjacent fabric layer, said connecting members being arranged in a plurality of parallel rows in the longitudinal direction of the fabric layers and having at least one strip of a heat reflecting material disposed in each interval between said rows.
Claim 15
Dependent Claim
95 words
A rollable and drapeable greenhouse curtain comprising: at least two fabric layers arranged in superposed spaced apart relation to the next adjacent layer and forming an air space therebetween; a plurality of connecting members each comprised of at least one thin, flexible thread extending between and connected at the opposed ends thereof to each superposed adjacent fabric layer, said connecting members being arranged in a plurality of parallel rows in the longitudinal direction of the fabric layers and having at least one strip of a heat reflecting material disposed in each interval between said rows.
Claim 16
Dependent Claim
16 words
The greenhouse curtain according to claim 12, wherein the number of heat reflecting strips is one.
Claim 17
Dependent Claim
14 words
A green-house curtain according to claim 12, wherein said strips consist of metallized foil.
Claim 18
Dependent Claim
33 words
A green-house curtain according to claim 12 or 14, wherein the length of the strips exceeds the length of the fabric layers and are arranged with a wave-shape formed between two fabric layers.
Claim 19
Dependent Claim
25 words
A green-house curtain according to claim 12, wherein the curtain along at least one side edge is provided with a means for receiving a rod.
Claim 20
Dependent Claim
14 words
The greenhouse curtain according to claim 16, wherein said receiving means comprises a channel.
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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) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |