US3900031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable diaper with reinforced waistband and tape attachment means
Assignee: Kimberly Clark Corp
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Filing: 1974-08-22
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Granted: 1975-08-19
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Expires: 1994-08-22
Abstract
Abstract A reinforced waistband and tape attachment means for disposable diapers particularly applicable to diapers comprised of an absorbent filler disposed between a fluid permeable cover sheet and a thermoplastic plastic film backing and having a thin thermoplastic film strip internally placed in the waistband area at each end. In this invention, the absorbent filler component of the diaper does not extend completely into the waistband area. This permits the facing sheet, backing sheet and supplemental plastic strip to be heat-sealed together at the diaper edge adjacent the end of the filler to provide a reinforced area at the edges of the waistband where the pressure-sensitive fastening tape is attached, as well as to provide a thinner, more flexible and better fitting waistband.
Inventors
- 👤 Dan D Endres
- 👤 Esther M Lafond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:00
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/56; A61F13/58
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
220 words
An improvement in a disposable diaper in which the sealed side edges of the diaper provide leg-encircling means and the sealed ends of the diaper provide a body-encircling waistband, said diaper being of the type which comprises an absorbent filler sandwiched between a fluid-permeable cover and a thermoplastic film backing and which also has a narrow thermoplastic film strip internally disposed between said cover and said backing at the ends and which film strip is heat-sealed to said cover and said backing across said ends forming the waistband, said improvement comprising a structure in which one end of said filler is short of one heat-sealed end leaving a narrow filler free section at that end, said filler free section having a small laminated area at the edges of the diaper adjacent the short filler end, said laminated area being formed by heat-sealing the cover sheet, backing sheet and film strip together in that area, said laminated area extending inward from the diaper edges about 1 to 2 inches and being about three-eighth to five-eighth inch wide, said diaper being provided with pressure-sensitive adhesive tape strips with one end of a strip of said pressure-sensitive adhesive tape being affixed to said backing in each of said laminated areas and the other end of said strip extending beyond the respective diaper edge.
Claim 2
Dependent Claim
220 words
An improvement in a disposable diaper in which the sealed side edges of the diaper provide leg-encircling means and the sealed ends of the diaper provide a body-encircling waistband, said diaper being of the type which comprises an absorbent filler sandwiched between a fluid-permeable cover and a thermoplastic film backing and which also has a narrow thermoplastic film strip internally disposed between said cover and said backing at the ends and which film strip is heat-sealed to said cover and said backing across said ends forming the waistband, said improvement comprising a structure in which one end of said filler is short of one heat-sealed end leaving a narrow filler free section at that end, said filler free section having a small laminated area at the edges of the diaper adjacent the short filler end, said laminated area being formed by heat-sealing the cover sheet, backing sheet and film strip together in that area, said laminated area extending inward from the diaper edges about 1 to 2 inches and being about three-eighth to five-eighth inch wide, said diaper being provided with pressure-sensitive adhesive tape strips with one end of a strip of said pressure-sensitive adhesive tape being affixed to said backing in each of said laminated areas and the other end of said strip extending beyond the respective diaper edge.
Claim 3
Dependent Claim
60 words
The diaper of claim 1 wherein the opposite end of said filler is also shortened and the filler free end provided at this Opposite end of the diaper also has a small laminated heat-sealed area comprised of the cover sheet, backing film, and film strip disposed at each of the diaper edges adjacent the shortened filler at said opposite 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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |