Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Reexamination Certificate
1999-01-29
2001-09-25
Nguyen, Anhtuan T. (Department: 3763)
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
C604S393000
Reexamination Certificate
active
06293936
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a disposable pull-on diaper for absorbing and containing body exudates.
International Application Disclosure Gazette (Kohyo) WO96/03950 discloses a disposable diaper of double structure type consisting of an inner wear and an outer wear. The inner ware is of briefs-shaped and comprises a liquid-pervious topsheet intended to be in contact with the wearer's skin and a liquid-impervious backsheet intended to be not in contact with the wearer's skin and a liquid-absorbent core disposed between these two sheets. The outer wear is of trunks-shaped made of a nonwoven fabric or a woven fabric and adapted to cover the entire inner wear from outside and thereby to conceal the inner wear. The outer wear has an inner surface of its waist-opening's peripheral edge bonded to the outer surface of the inner wear along its waist-opening's peripheral edge.
The outer wear in the known diaper comprises four fabrics extending vertically of the diaper and transversely opposite side edges of these fabric are bonded to the inner wear along transversely opposite side edges and a middle zone of the diaper so form trunks having a waist-opening and a pair of leg-openings each having a relatively large diameter. The waist-opening has an elastic stretchability in its circumferential direction. The outer wear has relatively many bonding lines and therefore requires much time and labor for manufacturing it. Additionally, many types (and shapes) of fabric must be prepared for manufacturing and may correspondingly lead to increase in the cost.
SUMMARY OF THE INVENTION
In view of the problem as has been described above, it is an object of the invention to provide a disposable pull-on diaper allowing the foregoing problem accompanying the prior art to be effectively eliminated.
According to one embodiment of the invention, there is provided a disposable pull-on diaper comprising an absorbent structure including a liquid-pervious topsheet, a liquid-impervious backsheet and a liquid-absorbent core disposed therebetween so as to form a front body intended to contact the wearer's belly, a rear body intended to contact the wearer's back and a crotch region extending between the front and rear bodies, and a trunks-shaped cover at least partially covering the absorbent structure, wherein: the absorbent structure is folded upon itself along the crotch region with the topsheet inside so as to have opposite side edges extending in a vertical direction of the diaper and longitudinal ends of the front and rear bodies extending between the opposite side edges; the cover comprises a first sheet intended to cover at least partially the front body as well as a front side of the crotch region and a second sheet intended to cover at least partially the rear body as well as a rear side of the crotch region, the first and second sheets respectively having opposite side edges extending in the vertical direction of the diaper and upper and lower edges extending transversely of the diaper, the first and second sheets being bonded to each other along their opposite side edges and transversely middle zones of their lower edges to present trunks-like configuration, and the first and second sheets have respective inner surfaces of their upper edges bonded to front and rear sides of the absorbent structure, respectively; and at least one of the first and second sheets has a pair of pleats extending in the vertical direction and symmetrically with respect to a center line dividing a width of the diaper in two, wherein the pair of pleats have a Z-shaped cross-section and an inverted Z-shaped cross-section, respectively.
According to a another embodiment of the invention, the front and rear bodies are placed flat together and bonded to each other along their side edges so as to present briefs-shaped configuration having a waist-opening and a pair of leg-openings.
According to another embodiment of the invention, the transversely opposite side edges of the absorbent structure placed flat together are interposed between the respective transversely opposite side edges of the cover placed upon each other and these absorbent structure, the first and second sheets are bonded together along their respective associated side edges.
According to still another embodiment of the invention, the longitudinally upper end of the absorbent structure is provided with elastic members extending transversely of the diaper and bonded thereto with an appropriate tension.
REFERENCES:
patent: 3807402 (1974-04-01), Miller et al.
patent: 4100922 (1978-07-01), Hernandez
patent: 4108179 (1978-08-01), Schaar
patent: 4883481 (1989-11-01), Blanchard
patent: 5052058 (1991-10-01), Mueller
patent: 37 09 669 C1 (1988-06-01), None
patent: 406200 (1910-01-01), None
patent: 2 269 998 (1994-03-01), None
patent: WO 96/03950 (1996-02-01), None
patent: WO96/03950 (1996-02-01), None
Copy of European Search Report, EP 99 30 5170, dated Sep. 29, 2000.
Baker & Daniels
Nguyen Anhtuan T.
Thompson Michael M.
Uni-Charm Corporation
LandOfFree
Disposable pull-on diaper does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Disposable pull-on diaper, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disposable pull-on diaper will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2475209