US4588635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic down
Assignee: Albany International Corp
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Filing: 1985-09-26
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Granted: 1986-05-13
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Expires: 2005-09-26
Abstract
Abstract A synthetic replacement for down is described which comprises a blend of (a) 80 to 95 weight percent of synthetic, spun and drawn, crimped, staple, polyester microfibers having a diameter of from 3 to 12 microns; and (b) 5 to 20 weight percent of synthetic, thermoplastic, staple macrofibers having a diameter of from more than 12, up to 50 microns.
Inventors
- 👤 James G. Donovan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:42
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4282; D04H1/4291; D04H1/4326; D04H1/4334; D04H1/4342; D04H1/435; D04H1/4382; D04H1/43835; D04H1/43838; D04H1/4391; D04H1/43918; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10S428/92; Y10T; Y10T442/00; Y10T442/60; Y10T442/603; Y10T442/607; Y10T442/608; Y10T442/614; Y10T442/626
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
138 words
A synthetic fiber batt thermal insulator material, which comprises a blend of (a) 80 to 95 weight percent of spun and drawn, crimped, staple synthetic polymeric microfibers having a diameter of from 3 to 12 microns; and (b) 5 to 20 weight percent of synthetic polymeric staple macrofibers having a diameter of from more than 12, up to 50 microns, said batt having the following characteristics: a radiation parameter defined as the intercept on the ordinate axis at zero density of a plot of k C P F against P F less than 0.075 (Btu-in/hr-ft 2 -°F.) (lb/ft 3 ) a density P F from 0.2 to 0.6 lb/cu ft and an apparent thermal conductivity K C measured by the plate-to-plate method according to ASTM C518 with heat flow down of less than 0.5 Btu-in./hr ft 2 °F.
Claim 2
Dependent Claim
138 words
A synthetic fiber batt thermal insulator material, which comprises a blend of (a) 80 to 95 weight percent of spun and drawn, crimped, staple synthetic polymeric microfibers having a diameter of from 3 to 12 microns; and (b) 5 to 20 weight percent of synthetic polymeric staple macrofibers having a diameter of from more than 12, up to 50 microns, said batt having the following characteristics: a radiation parameter defined as the intercept on the ordinate axis at zero density of a plot of k C P F against P F less than 0.075 (Btu-in/hr-ft 2 -°F.) (lb/ft 3 ) a density P F from 0.2 to 0.6 lb/cu ft and an apparent thermal conductivity K C measured by the plate-to-plate method according to ASTM C518 with heat flow down of less than 0.5 Btu-in./hr ft 2 °F.
Claim 3
Dependent Claim
39 words
The material of claim 1 having in the dry state a compressive strain of at least 90% under a compressive stress of 5 lbs/square inch and a long-term compressive recovery of at least 95% after removal of this stress.
Claim 4
Dependent Claim
21 words
The material of claim 1 in which at least one of the fibrous components is treated with a water repellant finish.
Claim 5
Dependent Claim
20 words
The material of claim 1 in which at least one of the fibrous components is treated with a lubricant finish.
Claim 6
Dependent Claim
22 words
The material of claim 1 in which the crimp in the microfibers is within the range 8 to 20 crimps per inch.
Claim 7
Dependent Claim
14 words
The materials of claim 1 in which the synthetic polymeric fibers are poly(ethylene terephthalate).
Claim 8
Dependent Claim
17 words
The material of claim 1 in which the synthetic polymeric fibers are polyaramide such as poly(p-phenylene terephthalamide).
Claim 9
Dependent Claim
13 words
The material of claim 1 in which the microfiber component is a polyolefin.
Claim 10
Dependent Claim
11 words
The material of claim 1 in which the macrofibers are crimped.
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) | 1989-05-12 | 1989-11-11 | 1990-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-12 | 1993-11-11 | 1994-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-12 | 1997-11-11 | 1998-05-13 | $7700.00 | Window Closed / Lapsed |