Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Reexamination Certificate
1998-10-08
2001-06-19
Dawson, Glenn K. (Department: 3761)
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
C604S385190, C604S385270
Reexamination Certificate
active
06248098
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to disposable diapers and more particularly to disposable diapers having a cavity adapted to receive excretion.
Japanese Patent Application Disclosure Gazette (Kokai) No. Hei5-285174 discloses a disposable diaper comprising an opening formed in a topsheet lying inside the diaper in its transversely middle zone, a pair of flaps which extend laterally from transversely opposite side edges of the opening and elastic members provided along respective outer edges of the flaps. With this arrangement, the pair of flaps slope downward under the effect of the elastic members and facilitate excretion to flow into the opening.
With the above-mentioned diaper of prior art, the outer edges of the respective flaps are tightly placed against a wearer's body, for example, inguinal region and thereby a feces receiving pocket which is effective also to prevent excretion from leaking sideways. Even if the wearer's movement such as walking causes the diaper to shift in the wearer's crotch region, such movement will be absorbed by deformation of the flaps. Consequently, the flaps will have their outer side edges continuing to be tightly placed against the wearer's body substantially without formation of an undesirable gap which might cause body fluids to leak sideways. However, such effect can be obtained only when a movement of the diaper is as small as negligible since a sufficient contacting area is unavailable between the outer side edges and the wearer's skin. To ensure that the outer side edges of the flaps can be maintained in tight contact even when a movement of the diaper is relatively large, a stretching stress of the elastic members may be correspondingly increased. Such countermeasure, however, is inevitably limited because it may cause the elastic members to be uncomfortably pressed against the wearer's skin and create a feeling of discomfort against a wearer or even may adversely affect the normal blood circulation.
SUMMARY OF THE INVENTION
In view of the above problems, it is an object of the invention to provide an improvement such that, even when a movement of a diaper relative to the wearer's crotch region is relatively large, an opening of a pocket or a cavity adapted to receive and hold excretion such as feces can be reliably maintained in close contact with the wearer's skin without unacceptably shifting.
According to the invention, there is provided a disposable diaper having a longitudinal direction, a transverse direction, a front waist region, a rear waist region and a crotch region therebetween, the diaper comprising an main body and a supplemental member; the main body including a liquid-permeable topsheet, a liquid-impermeable backsheet and a liquid-absorbent core disposed therebetween; the supplemental member including a pair of side walls having proximal edges and distal edges and extending in the longitudinal direction and spaced apart from each other by a predetermined distance in the transverse direction, a top wall extending between the distal edges of the side walls, and a cavity defined by the side walls and the top wall; each of the side walls being bonded at the proximal edge onto the topsheet; the top wall being formed with an opening adapted to guide excretion into the cavity; and elastic members being secured to the supplemental member in the proximity of the distal edges of the side walls under appropriate tension so that the elastic members normally bias the side walls to rise up on the topsheet and simultaneously bias the top wall to be spaced apart from the topsheet.
According to a preferred embodiment of this invention, the top wall is formed with a pair of openings adapted to guide feces and urine of excretion separately.
According to another preferred embodiment of this invention, the leakage-proof walls as well as the top wall are made of hydrophobic sheets.
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Baker & Daniels
Dawson Glenn K.
Shanoski Paul A.
Uni-Charm Corporation
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