US4704113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dressing
Assignee: Kendall Co
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Filing: 1985-10-25
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Granted: 1987-11-03
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Expires: 2005-10-25
Abstract
Abstract A dressing comprising a textile-like nonwoven fabric characterized in that the fibers comprise a blend of fibers including a percentage (preferably from about 15 to about 60 percent) of thermoplastic fibers, and the fabric is compacted (preferably micro-creped at an overfeed not less than 10 percent and typically in the range of about 20 to about 30 percent and at a drum temperature of greater than about 250 degrees F.) subsequent to hydro-entangling the fibers. prior to compacting, the fabric typically has a weight in the range of about 20 to 60 grams per square yard. After compacting, the fabric has an absorptive capacity and a liquid transfer both of which are greater than the absorptive capacity and liquid transfer of a hydro-entangled fabric of the same weight and fiber blend which has not been compacted.
Inventors
- 👤 Peter J. Schoots
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:25
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/01; A61F13/01008; D; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; D04H1/492; D04H1/495; D04H1/54; A61F2013/00361; A61F2013/00727; A61F2013/00731; A61F2013/0074; A61F13/15; A61F13/15577; A61F2013/15821; A61F13/53; A61F2013/530992; A61F13/534; A61F2013/53445; A61F13/537; A61F13/53708; A61F2013/53721
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
107 words
A dressing comprising at least one layer of a textile-like nonwoven fabric of hydro-entangled fibers, said fabric layer being characterized in that: said fibers comprise a blend of fibers including a percentage of thermoplastic fibers; and, said fabric is compacted subsequent to hydro-entangling said fibers to rearrange said fabric layer into a series of wave-like undulations, whereby said fabric subsequent to and solely as a consequence of said compacting has an absorptive capacity and a liquid transfer both of which are greater than the absorptive capacity and liquid transfer of a hydro-entangled fabric layer of the same fabric weight and fiber blend that has not been compacted.
Claim 2
Dependent Claim
107 words
A dressing comprising at least one layer of a textile-like nonwoven fabric of hydro-entangled fibers, said fabric layer being characterized in that: said fibers comprise a blend of fibers including a percentage of thermoplastic fibers; and, said fabric is compacted subsequent to hydro-entangling said fibers to rearrange said fabric layer into a series of wave-like undulations, whereby said fabric subsequent to and solely as a consequence of said compacting has an absorptive capacity and a liquid transfer both of which are greater than the absorptive capacity and liquid transfer of a hydro-entangled fabric layer of the same fabric weight and fiber blend that has not been compacted.
Claim 3
Dependent Claim
18 words
The dressing of claim 1 wherein said fibers comprise a blend including at least 15 percent thermoplastic fibers.
Claim 4
Dependent Claim
18 words
The dressing of claim 2 wherein said fibers comprise a blend including 15 to 60 percent thermoplastic fibers.
Claim 5
Dependent Claim
18 words
The dressing of claim 1 wherein said fibers comprise a blend of cellulosic fiber and a thermoplastic fiber.
Claim 6
Dependent Claim
26 words
The dressing of claim 4 wherein said cellulosic fiber is rayon and said thermoplastic fiber is selected from the group consisting of polyester and polypropylene fibers.
Claim 7
Dependent Claim
28 words
The dressing of claim 1 wherein said fabric prior to said compacting has a weight in the range of about 20 to about 60 grams per square yard.
Claim 8
Dependent Claim
10 words
The dressing of claim 1 wherein said compacting is micro-creping.
Claim 9
Dependent Claim
19 words
The dressing of claim 7 wherein said fabric is micro-compacted with an overfeed of not less than 10 percent.
Claim 10
Dependent Claim
19 words
The dressing of claim 8 wherein said overfeed is in the range of about 20 to about 30 percent.
Claim 11
Dependent Claim
12 words
The dressing of claim 9 wherein said overfeed is about 30 percent.
Claim 12
Dependent Claim
44 words
The dressing of claim 7 wherein during said compacting said fabric contacted with a surface having a temperature of not less than about 250 degrees F. whereby said temperature sets said thermoplastic fiber of said fabric for maintaining the compacted configuration of said fabric.
Claim 13
Dependent Claim
13 words
The dressing of claim 11 wherein said temperature is about 300 degrees F.
Claim 14
Dependent Claim
152 words
A dressing comprising at least one layer of a textile-like nonwoven fabric of essentially unbonded, hydro-entangled fibers, said fabric layer being characterized in that: said fibers comprise a blend of fibers including not less than about 15 percent thermoplastic fibers, said fabric layer is micro-creped at an overfeed of not less than about 10 percent and at a microcreper drum temperature of not less than about 250 degrees F. subsequent to hydro-entangling said fibers to form said fabric, and said fabric prior to said micro-creping has a weight in the range of about 20 to about 60 grams per square yard, whereby said fabric layer subsequent to and solely as a consequence of said micro-creping has an absorptive capacity and a liquid transfer both of which are greater than the absorptive capacity and liquid transfer of a hydro-entangled fabric layer of the same weight and fiber blend that has not been micro-creped.
Claim 15
Dependent Claim
152 words
A dressing comprising at least one layer of a textile-like nonwoven fabric of essentially unbonded, hydro-entangled fibers, said fabric layer being characterized in that: said fibers comprise a blend of fibers including not less than about 15 percent thermoplastic fibers, said fabric layer is micro-creped at an overfeed of not less than about 10 percent and at a microcreper drum temperature of not less than about 250 degrees F. subsequent to hydro-entangling said fibers to form said fabric, and said fabric prior to said micro-creping has a weight in the range of about 20 to about 60 grams per square yard, whereby said fabric layer subsequent to and solely as a consequence of said micro-creping has an absorptive capacity and a liquid transfer both of which are greater than the absorptive capacity and liquid transfer of a hydro-entangled fabric layer of the same weight and fiber blend that has not been micro-creped.
Claim 16
Dependent Claim
27 words
The dressing of claim 13 wherein said fabric comprises a blend of rayon fibers and fibers selected from the group consisting of polyethylene fibers and polyester fibers.
Claim 17
Dependent Claim
20 words
The dressing of claim 14 wherein said blend includes in the range of 40 to 85 percent said rayon fibers.
Claim 18
Dependent Claim
32 words
The dressing of claim 14 wherein said blend includes rayon fibers and polyester fibers, and said fabric is micro-creped at an overfeed in the range of about 20 to about 30 percent.
Claim 19
Dependent Claim
18 words
The dressing of claim 16 wherein said fabric is micro-creped using a microcreper having a groove micro-creping pattern.
Claim 20
Dependent Claim
13 words
The dressing of claim 13 wherein said temperature is about 300 degrees F.
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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) | 1990-11-02 | 1991-05-04 | 1991-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-02 | 1995-05-04 | 1995-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-02 | 1999-05-04 | 1999-11-03 | $7700.00 | Window Closed / Lapsed |