US4449979A
Expired / Lapsed
US
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Absorbent structure having gradient densities
Assignee: Johnson and Johnson Consumer Inc
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Filing: 1980-08-26
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Granted: 1984-05-22
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Expires: 2000-08-26
Abstract
Abstract An absorbent structure of loosely compacted cellulosic fibers substantially rectangular in shape having increasing gradient densities from the central portion to each transverse end and methods for making the structure.
Inventors
- 👤 Dennis C. Holtman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:52
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/531; A61F13/532; A61F13/15203; A61F13/45; A61F13/47; A61F13/472; A61F13/49; A61F13/49007; A61F13/534; A61F13/537; A61F13/5376; A61F2013/15284; A61F2013/15422; A61F2013/1543; A61F13/51; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/530131; A61F2013/530343; A61F2013/530379; A61F2013/530423; A61F13/53708; A61F2013/53721
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
67 words
An absorbent structure comprising an absorbent batt of loosely compacted cellulosic fibers substantially of rectangular shape wherein the longitudinal sides are longer than the transverse ends, said batt having gradient densities whereby the density of the batt increases along a longitudinal line starting from the central portion of the batt to each transverse end, the density in a cross direction being substantially constant on any given line.
Claim 2
Dependent Claim
67 words
An absorbent structure comprising an absorbent batt of loosely compacted cellulosic fibers substantially of rectangular shape wherein the longitudinal sides are longer than the transverse ends, said batt having gradient densities whereby the density of the batt increases along a longitudinal line starting from the central portion of the batt to each transverse end, the density in a cross direction being substantially constant on any given line.
Claim 3
Dependent Claim
32 words
The absorbent structure of claim 1 wherein the density near the transverse ends of the absorbent structure is at least 1.5 times the density in the central portion of the absorbent structure.
Claim 4
Dependent Claim
21 words
The absorbent structure of claim 1 wherein a paper-like gradient densified skin is formed on one surface of the absorbent batt.
Claim 5
Dependent Claim
24 words
The absorbent structure of claim 1 wherein densified lines extending from the central portion toward the transverse ends of the absorbent structure are provided.
Claim 6
Dependent Claim
21 words
The absorbent structure of claim 4 wherein a paper-like gradient densified skin is formed on one surface of the absorbent batt.
Claim 7
Dependent Claim
80 words
A disposable diaper comprising a moisture-permeable facing, an absorbent batt in superposed position to said facing, and a moisture-impermeable backing superimposed on the side opposite the absorbent batt from the facing, said absorbent batt being of loosely compacted cellulosic fibers and having gradient densities whereby the density of the batt increases along a longitudinal line starting from the central portion of the batt to each transverse end, the density in a cross direction being substantially constant on any given line.
Claim 8
Dependent Claim
80 words
A disposable diaper comprising a moisture-permeable facing, an absorbent batt in superposed position to said facing, and a moisture-impermeable backing superimposed on the side opposite the absorbent batt from the facing, said absorbent batt being of loosely compacted cellulosic fibers and having gradient densities whereby the density of the batt increases along a longitudinal line starting from the central portion of the batt to each transverse end, the density in a cross direction being substantially constant on any given line.
Claim 9
Dependent Claim
25 words
The disposable diaper of claim 6 wherein a paper-like gradient densified skin is formed on the surface of the batt in contact with the backing.
Claim 10
Dependent Claim
22 words
The disposable diaper of claim 6 wherein densified lines extend longitudinally from the central portion of the batt toward each transverse end.
Claim 11
Dependent Claim
43 words
A disposable diaper of claim 6 wherein a paper-like gradient densified skin is formed on the surface of the batt in contact with the backing and densified lines longitudinally extending from the central portion toward the transverse ends of the batt are provided.
Claim 12
Dependent Claim
77 words
A sanitary napkin comprising a moisture-impermeable backing, an absorbent batt superposed on said backing, and a moisture-permeable covering superposed on said batt on the side opposite the backing, said batt being of loosely compacted cellulosic fibers and having gradient densities whereby the density of the batt increases along a longitudinal line starting from the central portion of the batt longitudinally toward each transverse end, the density in a cross direction being substantially constant on any given line.
Claim 13
Dependent Claim
77 words
A sanitary napkin comprising a moisture-impermeable backing, an absorbent batt superposed on said backing, and a moisture-permeable covering superposed on said batt on the side opposite the backing, said batt being of loosely compacted cellulosic fibers and having gradient densities whereby the density of the batt increases along a longitudinal line starting from the central portion of the batt longitudinally toward each transverse end, the density in a cross direction being substantially constant on any given line.
Claim 14
Dependent Claim
26 words
The sanitary napkin of claim 10 wherein a paper-like gradient densified skin is formed on the surface of the batt in contact with the moisture-impermeable backing.
Claim 15
Dependent Claim
25 words
The sanitary napkin of claim 10 wherein densified lines extending longitudinally from the central portion to each transverse end are provided on the absorbent batt.
Claim 16
Dependent Claim
44 words
The sanitary napkin of claim 10 wherein a paper-like gradient densified skin is formed on the surface of the batt in contact with the backing and densified lines longitudinally extending from the central portion toward each transverse end of the absorbent batt are provided.
Claim 17
Dependent Claim
50 words
A process for preparing an absorbent structure which comprises providing a loosely compacted cellulosic fibrous batt having longitudinal sides longer than the transverse ends and compressing the batt to provide gradient densities whereby the density of the batt increases from the central portion of the batt toward each transverse end.
Claim 18
Dependent Claim
50 words
A process for preparing an absorbent structure which comprises providing a loosely compacted cellulosic fibrous batt having longitudinal sides longer than the transverse ends and compressing the batt to provide gradient densities whereby the density of the batt increases from the central portion of the batt toward each transverse end.
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) | 1987-05-22 | 1987-11-21 | 1988-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-22 | 1991-11-21 | 1992-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-22 | 1995-11-21 | 1996-05-22 | $7700.00 | Window Closed / Lapsed |