US3777758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable diaper
Assignee: Individual
•
Filing: 1971-11-12
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Granted: 1973-12-11
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Expires: 1991-11-12
Abstract
Abstract A disposable multi-layer diaper is disclosed in which a first layer to be brought into contact with an infant''s skin, is a through bonded non-woven fabric of predominantly short length fibers mixed with long, i.e., textile length, fibers. The fabric is treated with a rewetting agent so as to have the desired degree of wettability and absorbency. A second layer, in juxtaposition to the facing layer, is a highly absorbent pad of short length fibers. The final layer, positioned on the side of said pad opposite said facing layer, is also through bonded nonwoven fabric of predominantly short length fibers in admixture with long or textile length fibers. In each of the layers of the diaper the short length fibers are naturally occurring cellulosic fibers, e.g., wood pulp fibers and cotton linters having a length not exceeding about one-quarter inch.
Inventors
- 👤 L May
- 👤 N Schiff
- 👤 W Strickel
- 👤 G Liloia
- 👤 F Mesek
- 👤 R Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:56
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/514; A61F13/51474; A61F13/511; A61F13/51104; A61F13/51113; A61F13/51121; A61F13/51401; D; D21; D21H; D21H27/00; D21H5/00; D21H5/26
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
22 words
The diaper of claim 1 wherein both said facing layer and said backing layer are formed of said through bonded non-woven fabric.
Claim 2
Dependent Claim
19 words
The diaper of claim 2 wherein said facing layer is treated with a rewetting agent to make it water-wettable.
Claim 3
Dependent Claim
61 words
The diaper of claim 1 wherein said facing layer and said backing layer are rectangular and substantially co-extensive, said pad is substantially rectangular, narrower than said facing layer and said backing layer and centrally disposed with respect thereto to provide marginal portions of said diaper in which said facing layer and said backing layer are in direct contact with each other.
Claim 4
Dependent Claim
22 words
The diaper of claim 4 wherein said marginal portions of said facing layer and said backing layer are adhered to one another.
Claim 5
Dependent Claim
80 words
The diaper of claim 2 in which the through-bonded fabric of said facing layer and the through-bonded fabric of said backing layer each have one surface in which the fiber loft is substantially greater than the fiber loft of the other surface, the surfaces of greater fiber loft of said fabrics facing one another to mechanically interlock said facing layer and said backing layer at least in part through the interlocking of fibers on the surfaces of greater fiber loft.
Claim 6
Dependent Claim
36 words
The diaper of claim 6 in which a strip of open mesh fabric is placed between said facing layer and said backing layer at opposite ends of the diaper to reinforce the diaper in these areas.
Claim 7
Dependent Claim
30 words
The diaper of claim 1 wherein the short fiber content of the facing layer is in the range of about 75 to about 98 percent by weight of the fabric.
Claim 8
Dependent Claim
17 words
The diaper of claim 1 wherein said short and long fibers are randomly disposed and uniformly distributed.
Claim 9
Dependent Claim
150 words
A multi-layer diaper comprising: a water-wettable facing layer adapted to be positioned adjacent the skin of an infant; a highly absorbent pad disposed in face-to-face juxtaposition to said facing layer; and a backing layer on the side of said pad opposite said facing layer, said backing layer comprising a through bonded non-woven fabric of mixed short and long fibers, said fabric having a short fiber content of at least about 75 percent by weight of the fabric, said short fibers having a length less than one-fourth inch and said long fibers having a length greater than three-fourths inch, said fibers being bonded by a cross-linked binder applied throughout said fabric in an amount between about 1 percent and about 30 percent of the weight of the fibers on a dry solids basis, said fabric having a weight of less than 8 oz./yd.2 and a density of 0.05 to 0.15 gm./cc.
Claim 10
Dependent Claim
35 words
The diaper of claim 10 wherein both said facing layer and said backing layer are formed of said through bonded non-woven fabric, said facing layer being treated with a rewetting agent to make it water-wettable.
Claim 11
Dependent Claim
61 words
The diaper of claim 10 wherein said facing layer and said backing layer are rectangular and substantially coextensive, said pad is substantially rectangular, narrower than said facing layer and said backing layer and centrally disposed with respect thereto to provide marginal portions of said diaper in which said facing layer and said backing layer are in direct contact with each other.
Claim 12
Dependent Claim
96 words
A multi-layer diaper comprising: a facing layer; a highly absorbent fibrous pad disposed in face-to-face juxtaposition to said facing layer; and a backing layer on the side of said pad opposite said facing layer, said facing layer comprising a nonwoven fabric of mixed short and long fibers having one surface in which the fiber loft is Substantially greater than the fiber loft of the other surface, the surface of greater fiber loft facing inwardly and in direct contact with a surface of said pad, the fibers in said contacting surfaces being mechanically interlocked with each other.
Claim 13
Dependent Claim
27 words
The diaper of claim 13 wherein said facing layer is embossed on at least the outer surface thereof, whereby the drape characteristics of the diaper are enhanced.
Claim 14
Dependent Claim
139 words
The diaper of claim 13 wherein said facing layer and said backing layer are rectangular and substantially coextensive, said pad is substantially rectangular, narrower than said facing layer and said backing layer and centrally disposed with respect thereto to provide marginal portions of said diaper in which said facing layer and said backing layer are in direct contact with each other, said backing layer comprising a nonwoven fabric of mixed short and long fibers having one surface in which the fiber loft is substantially greater than the fiber loft of the other surface, the surface of greater fiber loft in said backing layer facing inwardly and in direct contact in said marginal portions with the surface of greater fiber loft of said facing layer, the fibers on said contacting surfaces in said marginal portions being interlocked with each other.
Claim 15
Dependent Claim
27 words
The diaper of claim 1 wherein said facing layer is embossed on at least the outer surface thereof whereby the drape characteristics of the diaper are enhanced.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |