Trunks-type disposable pants

Details Trunks-type disposable pants Trunks-type disposable pants

2001-02-16

2001-09-25

Weiss, John G. (Department: 3761)

Surgery

Means and methods for collecting body fluids or waste material

Absorbent pad for external or internal application and...

C604S392000, C604S393000, C604S394000, C604S395000, C604S385190, C604S348000, C604S402000

Reexamination Certificate

active

06293937

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention relates to trunks-type disposable pants.
Japanese Patent Application Publication No. 1994-63072A describes trunks-type disposable pants made by a process comprising steps of placing separately formed with front and rear bodies, bonding these front and rear bodies along bond lines extending on crotch regions of these bodies so as to describe curves being convex upward and attaching a longitudinally larger liquid-absorbent panel to the inner surface of the crotch region. Excretion is absorbed by the liquid-absorbent panel attached to the crotch region.
In the pants disclosed in the Gazette, the longitudinally larger liquid-absorbent panel has a desired width dimension and attached to the crotch region so as to extend in horizontal direction. Transversely opposite side edges of the panel are compressed between thighs of a wearer and these side edges may give the wearer a feeling of incompatibility as the pants are put on the wearer's body. In addition, these side edges have no barriers to prevent excretion spread over the upper surface of the panel from leaking through gap defined between both sides of the crotch region and the wearer's thighs.
SUMMARY OF THE INVENTION
It is an object of this invention to provide trunks-type disposable pants designed so that excretion leak possibly occurring from both sides of a crotch region is reliably avoided without giving a wearer a feeling of incompatibility.
According to this invention, there is provided trunks-type disposable pants having a waist-opening ay its top and a pair of leg-openings ay its bottom wherein the waist-opening is provided along its peripheral edge having an elastic stretchability circumferentially of the waist-opening.
The trunks-type disposable pants further comprises a pair of inner sheets confronting each other and a pair of outer sheets lying outside the inner sheets, the inner sheets as well as the outer sheets being contoured by upper and lower ends transversely extending in parallel to each other, respectively, and front and rear side portions longitudinally extending in parallel to each other, respectively, the inner sheets are formed between their front and rear side portions with cutouts depressed from the upper ends toward the lower ends and provided with mat-like liquid-absorbent panels attached to opposed surfaces of the inner sheets so that the opposed surfaces of the inner sheets are bonded together by means of bond lines extending in parallel to the cutouts and partially extending below the liquid-absorbent panels, and opposed surfaces of the inner sheets and the outer sheets are bonded together along the front and rear side portions of these sheets.
The trunks-type disposable pants according to this invention has a simplified construction such that the inner sheets are placed upon each other and the opposed surfaces of these inner sheets are bonded together while the respective inner sheets are placed upon the respectively adjacent outer sheets and the opposed surfaces of respective pairs of the adjacent inner and outer sheets are bonded together. Such simplified construction facilitates the pants to be made and is suitable for disposable sanitary article.
With the novel pants having the side sheets bonded to the inner sheets in the vicinity of their bottom sides, the side sheets and the regions in the opposed surfaces of the inner sheets extending from the bottom sides to the bond lines are expanded outward transversely of the pants as the elastic members attached to the respective side sheets contract. Consequently, these sheets form a pocket opening upwardly of the pants. The pocket includes therein the liquid-absorbent panels. The side sheets and the inner sheets define the barriers so that the amount of excretion discharged into the pocket is absorbed by the panels and the barriers prevent any leak of the excretion from possibly occurring in the vicinity of the crotch region.
In the pants having the elastic members bonded to the respective inner sheets in the vicinity of the bottom sides thereof, the regions in the opposed surfaces of the inner sheets extending from the bottom sides to the bond lines are expanded outward transversely of the pants as the elastic members bonded to the inner sheets contract. Consequently, the inner sheets form the pocket opening upwardly of the pants. The pocket includes therein the liquid-absorbent panels and the respective inner sheets define barriers functioning to prevent any amount of the excretion having been discharged into the pocket and absorbed by the panels from leaking from the crotch region.
The panels extend in parallel to the inner sheets substantially in the vertical direction and therefore are less bulky in the crotch region than when these panels extend in the horizontal direction. In this manner, it is not apprehended that the panels give the wearer a feeling of incompatibility.
The novel pants achieve a substantially higher bonding strength as measured circumferentially of the pants than that achieved by the pants in which the opposed surfaces are not bonded together along the regions. This is because, according to this invention, the opposed surfaces of the inner sheets are bonded together along regions of the front and rear side portions extending in the vicinity of the respective upper ends of said inner sheets.


REFERENCES:
patent: 1833960 (1931-12-01), Alsop
patent: 5062840 (1991-11-01), Holt et al.
patent: 5176672 (1993-01-01), Bruemmer et al.
patent: 5397318 (1995-03-01), Dreier
patent: 5853403 (1998-12-01), Tanzer et al.
patent: 6133501 (2000-10-01), Hallock et al.
patent: 6-63072 (1994-03-01), None

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