US4050463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diapers
Assignee: Colgate Palmolive Co
•
Filing: 1976-08-20
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Granted: 1977-09-27
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Expires: 1996-08-20
Abstract
Abstract In a disposable diaper comprising a porous absorbent pad of cellulosic fibers and a water impervious back sheet adjacent and bonded to one surface of the pad, that improvement wherein the fibers at the surface of the pad opposite the backing sheet are bonded together with a resinous material, the bonded fibers forming a porous matrix defining the top layer of the diaper and being adapted for placement in direct contact with the infant's skin.
Inventors
- 👤 Charles H. Schaar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:33
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/511; A61F13/15577; A61F13/53; A61F13/539; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/24; A61L15/26
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
77 words
In a disposable diaper for contact with the body skin comprising a highly porous absorbent pad of cellulosic fibers and a water-impervious backing sheet adjacent and bonded to one side of said pad, that improvement wherein: the fibers of said pad at the surface thereof opposite said backing sheet are bonded together with a resinous binder, said binder and said fibers bonded thereby forming a porous matrix and defining the top body contacting surface of said diaper.
Claim 2
Dependent Claim
77 words
In a disposable diaper for contact with the body skin comprising a highly porous absorbent pad of cellulosic fibers and a water-impervious backing sheet adjacent and bonded to one side of said pad, that improvement wherein: the fibers of said pad at the surface thereof opposite said backing sheet are bonded together with a resinous binder, said binder and said fibers bonded thereby forming a porous matrix and defining the top body contacting surface of said diaper.
Claim 3
Dependent Claim
29 words
The diaper of claim 1 wherein said binder extends from said upper surface inwardly into said pad a distance not more than 50% of the thickness of said pad.
Claim 4
Dependent Claim
16 words
The diaper of claim 2 wherein said distance is not more than 25% of said thickness.
Claim 5
Dependent Claim
24 words
The diaper of claim 1 wherein said binder comprises a resin selected from the group consisting of acrylic, alkyd, butyl, urethane, and vinyl resins.
Claim 6
Dependent Claim
66 words
The diaper of claim 1 wherein the basis weight of said pad is in the range of about 0.150 to 0.210 grams per square centimeter, the density thereof under a compression of 2.1 g/cm 2 is in the range of 0.065 to 0.140 g/cc., and the density thereof under a compression of 51.2 g/cm 2 is in the range of 0.105 to 0.210 g/cm 2 .
Claim 7
Dependent Claim
36 words
The diaper of claim 1 wherein lateral side edge portions of said backing sheet are folded over and around respective lateral side edges of said pad and adhered to said bonded fibers defining said top surface.
Claim 8
Independent Claim
122 words
The method of making a diaper comprising the steps of providing a pad of absorbent cellulosic fibers, creating a smooth but highly porous body skin contacting top surface on said pad by applying a resinous binder to a first surface of the pad, bonding said fibers together into a net like skin structure by applying heat and pressure to cure the resinous binder, bonding a liquid impervious sheet to the opposite side of said pad, and folding lateral side portions of said backing around and over the lateral edges of said pad and securing said side portions to said bonded surface along said lateral edges whereby said sheet and said first surface define, respectively, the bottom and top surface of said diaper.
Claim 9
Independent Claim
122 words
The method of making a diaper comprising the steps of providing a pad of absorbent cellulosic fibers, creating a smooth but highly porous body skin contacting top surface on said pad by applying a resinous binder to a first surface of the pad, bonding said fibers together into a net like skin structure by applying heat and pressure to cure the resinous binder, bonding a liquid impervious sheet to the opposite side of said pad, and folding lateral side portions of said backing around and over the lateral edges of said pad and securing said side portions to said bonded surface along said lateral edges whereby said sheet and said first surface define, respectively, the bottom and top surface of said diaper.
Claim 10
Dependent Claim
36 words
The method of claim 7 wherein said binder is applied to said first surface in liquid form and including the step of curing said binder by direct application of heat and pressure to said first surface.
Claim 11
Dependent Claim
24 words
The method of claim 7 wherein said binder includes a resin selected from the group consisting of alkyd, acrylic, urethane, butyl, and vinyl resins.
Claim 12
Dependent Claim
36 words
The method of claim 7 wherein said binder is applied to said first surface in the form of a liquid and penetrates said pad to a distance of not more than 25% of the thickness thereof.
References Cited (Backward Citations)
US3111948A
Cited
US3395201A
Cited
US3523536A
Cited
US3759775A
Cited
US3663348A
Cited
US3661680A
Cited
US3721242A
Cited
US3852007A
Cited
US3626944A
Cited
US3750669A
Cited
US3765418A
Cited
US3863637A
Cited
US3828783A
Cited
US3848594A
Cited
US3848597A
Cited
US3848598A
Cited
US3952124A
Cited
US3884234A
Cited
US3901238A
Cited
US3955577A
Cited
US3903890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |