Patent US4799253A successfully refreshed from Google Patents.
US4582747A
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Dust-proof fabric
Assignee: Teijin Ltd
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Filing: 1985-02-14
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Granted: 1986-04-15
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Expires: 2005-02-14
Abstract
Abstract A dust-proof fabric having an excellent dust-collecting efficiency and dust-preventing property including a plurality of filament yarns having a thickness of 20 to 400 denier and consisting of a plurality of individual filaments having a denier of 3.5 or less. The fabric has a number of pores formed therein and exhibits an air permeability of 0.3 to 10 ml/cm 2 /sec. In the fabric, the proportion of the integrated volume of pores having a size of 43 μm or more to the entire integrated volume of all the pores in the fabric is 40% or less.
Inventors
- 👤 Tadashi Hirakawa
- 👤 Mamoru Tsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:42
CPC Classifications
D; D03; D03D; D03D1/00; D03D1/0017; D03D1/0023; D03D15/00; D03D15/20; D03D15/242; D03D15/267; D03D15/275; D03D15/283; D03D15/40; D03D15/41; D10; D10B; D10B2101/00; D10B2101/02; D10B2101/06; D10B2201/00; D10B2201/20; D10B2201/22; D10B2201/24; D10B2201/28; D10B2211/00; D10B2211/01; D10B2211/04; D10B2321/00; D10B2321/02; D10B2331/00; D10B2331/02; D10B2331/021; D10B2331/04; D10B2401/00; D10B2401/10; D10B2401/16; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S55/00; Y10S55/43; Y10S55/45; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/249979; Y10T428/249986; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2931; Y10T428/298; Y10T442/00; Y10T442/30; Y10T442/3065; Y10T442/3089; Y10T442/3106; Y10T442/313; Y10T442/3976; Y10T442/40; Y10T442/425; Y10T442/431; Y10T442/438
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
87 words
A dust-proof fabric comprising a plurality of filament yarns having a denier of from 20 to 400 and consisting of a plurality of individual filaments having a denier of 3.5 or less, which fabric has a number of pores formed therein and exhibits an air permeability of from 0.3 to 10 ml/cm 2 /sec and, in which fabric, the integrated volume proportion of the pores having a size of 43 μm or more corresponds to 40% or less of the entire integrated volume of all the pores.
Claim 2
Dependent Claim
87 words
A dust-proof fabric comprising a plurality of filament yarns having a denier of from 20 to 400 and consisting of a plurality of individual filaments having a denier of 3.5 or less, which fabric has a number of pores formed therein and exhibits an air permeability of from 0.3 to 10 ml/cm 2 /sec and, in which fabric, the integrated volume proportion of the pores having a size of 43 μm or more corresponds to 40% or less of the entire integrated volume of all the pores.
Claim 3
Dependent Claim
38 words
The dust-proof fabric as claimed in claim 1, wherein the integrated volume proportion of the pores having a size of 43 μm or more is 25% or less based on the entire integrated volume of all the pores.
Claim 4
Dependent Claim
40 words
The dust-proof fabric as claimed in claim 1, wherein the integrated volume proportion of the pores having a size of from 0.1 μm to 10 μm corresponds to 28% or more of the entire integrated volume of all the pores.
Claim 5
Dependent Claim
40 words
The dust-proof fabric as claimed in claim 3, wherein the integrated volume proportion of the pores having a size of from 0.1 μm to 10 μm corresponds to 40% or more of the entire integrated volume of all the pores.
Claim 6
Dependent Claim
30 words
The dust-proof fabric as claimed in claim 1, which is in the form of a woven fabric composed of a plurality of warps and wefts consisting of the filament yarns.
Claim 7
Dependent Claim
39 words
The dust-proof fabric as claimed in claim 5, wherein the warps and/or wefts contain electrically conductive filament yarns having an electric resistivity of 10 10 Ω/cm or less and arranged at intervals of from 3 mm to 50 mm.
Claim 8
Dependent Claim
20 words
The dust-proof fabric as claimed in claim 1, which fabric has a thickness of from 0.05 mm to 0.40 mm.
Claim 9
Dependent Claim
21 words
The dust-proof fabric as claimed in claim 1 or 5, wherein the denier of the individual filaments is 1.5 or less.
Claim 10
Dependent Claim
19 words
The dust-proof fabric as claimed in claim 8, wherein the denier of the individual filaments is 0.5 or less.
Claim 11
Dependent Claim
40 words
The dust-proof fabric as claimed in claim 1, wherein the individual filaments are selected from the group consisting of polyester filaments, polyamide filaments, polyaramide filaments, polyolefin filaments, polyvinyl polymer filaments, rayon filaments, cellulose acetate filaments, silk filaments, and glass filaments.
Claim 12
Dependent Claim
52 words
The dust-proof fabric as claimed in claim 9, wherein the individual filaments having a denier of 0.5 or less are ones prepared from peel-separating composite filaments composed of a polyester filamentary constituent and a polyamide filamentary constituent connected to each other by peel-separating the polyester and polyamide filamentary constituents from each other.
Claim 13
Dependent Claim
21 words
The dust-proof fabric as claimed in claim 1, wherein at least a portion of the filament yarns comprises bulky multifilament yarns.
References Cited (Backward Citations)
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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) | 1989-04-14 | 1989-10-14 | 1990-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-14 | 1993-10-14 | 1994-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-14 | 1997-10-14 | 1998-04-15 | $7700.00 | Window Closed / Lapsed |