NZ202643A

NZ202643A - Hour-glass shaped,elasticized disposable diaper,elastic secured to backing sheet in crotch region and to tissue wadding in ears regions

Info

Publication number: NZ202643A
Application number: NZ202643A
Authority: NZ
Inventors: H Karami
Original assignee: Colgate Palmolive Co
Priority date: 1981-12-07
Filing date: 1982-11-29
Publication date: 1986-02-21
Also published as: IT8249631A0; BR8207073A; PT75936A; IE822904L; ZA828673B; GB2112627A; GB2112627B; FR2517520A1; CA1183305A; FR2517520B1; NL8204739A; GR78128B; PT75936B; ES268990U; CH659367A5; AU559888B2; PH19872A; JPS58115103A; IT1149136B; DE3244234A1

Description

<div class="application article clearfix" id="description"> Priority Dato(s): . V.~; I. Complete Specification Filed: Class: Publication Date: . !?A P.O. Journal, No: .I.3&Q Patents Form No. 5 Number ■■d PATENTS ACT 1953 Dated COMPLETE SPECIFICATION ELASTICIZED DISPOSABLE DIAPER 00 YlWe COLGATE-PALMOLIVE COMPANY a corporation organised under the laws of the State of Delaware, United States of America of 300 Park Avenue, New York, New York 10022, United States of America do hereby cieclarc the invention for which^/we pray that a Patent may be crantcd to iok/us. and the method by which it is to be performed, to be particularly described in and bv the following statement: - 1 - Ifclloud BACKGROUND OP THE INVENTION FIELD OF TIE INVENTION This invention relates to disposable diapers and more particularly to an elasticized and contoured diaper. DESCRIPTION OF THE PRIOR ART In the past elasticized contoured diapers have been developed such as that disclosed in the patent to Buell, No. 3*860,003j issued January 14, 1975 j for "Contractable Side Portions for Disposable Diaper" wherein elastic strips are secured to the crotch portions of the diaper and spaced at least 3/^ inch from the abosrbent pad to form elasticized crotch seals for securement over the legs of the infant to prevent loss of fluid from the interior of the diaper along the legs of the infant. The elasticized strips were placed more than 3/^ inch from the absorbent pad in order to prevent pleats forming transversely of the crotch area of the diaper. Another diaper is presently in production in which the elasticized strips are less than "5/k inch from the absorbent pad for the production of the transverse pleats in the crotch area of the diaper for the purpose of increasing the absorbent capacity at the crotch area of the diaper. However, it has been found that these pleats may act as a channel resulting in excessive diaper leakage and the pleats in the crotch area make the infant's bottom uncomfortable when sitting especially while the diaper isnot saturated. - la - SUMMARY OF THE INVENTION The present invention overcomes the disadvantages of both of the prior art diapers. The elastic members are placed according to the present invention less than 3/^ inch from the absorbent pad thereby reducing the width of the crotch seals rendering the diaper more comfortable. However, the elasticized strips so positioned that the tension thereon can be maintained and adjusted so that no transverse pleats are formed in the diaper, thereby eliminating excessive leakage and discomfort of the pleats'prior saturation. The concept of the invention features a disposatiL e diaper which is contoured in an hour-glass configuration and having an absorbent body between a top sheet and a backing sheet with elastic members secured to the backing sheet, but less than 3/^inch from the absorbent body. The tension on the elastic members is such that there will be pleats only along the crotch seals and no pleats transversely along the crotch area of the diaper. BRIEF DESCRIPTION OF THE DRAWING- Fig. 1 is a plan view of a diaper constructed in accordance with the concepts of the present invention; Fig. 2 is a transverse sectional view taken along the plane of line 2-2 in Fig. 1 through the crotch portion of the diaper; and, Fig. 3 is a transverse view taken along the plane of line 3-3 in Fig. 1. 2026 - 2 - DETAILED DESCRIPTION OF THE INVENTION With continuing reference to the accompanying drawing, wherein like reference numerals designate similar parts throughout the various views, reference numeral 10 generally designates an elasticized and contoured disposable diaper constructed in accordance with the concepts of the present invention. The diaper is of an hour-glass configuration having a crotch area 12 and four portions of greater width defining ears 14, 16, 18 and 20. The diaper Includes a backing sheet 22 of an impervious polyethylene or polypropylene film. A top sheet 24, preferably of non-woven or polyethylene or polypropylene fibers, is preferably heat sealed by hot melt lines to the backing sheet along the peripheral edges of the diaper. An absorbent pad 26 is disposed between the top sheet 24 and the backing sheet 22 and may be of wood fluff or the like. An upper wadding sheet 28 and a lower wadding sheet 30 are provided, the pad and the wadding sheet conforming generally in contours to the hour-glass shape. A pair of elasticized strips 3^-and 36, which are provided with adhesive on at least the bottom surface thereof and optionally on the top surface thereof, are bonded by their adhesive to the backing sheet 22 immediately adjacent the pad 24 and in all events less than 3/^ inch from the pad. The strips 3^ a^d 36 extend the length of the crotch area 12 and' overlie and are secured to the earred portion of the upper wadding sheet 28, as shown in 2026 45 Fig. 3, so that the tension on the heat sealed backing sheet and top sheet provided by the elasticized strips is such that the pleats are only formed in the crotch seals formed by the elasticized strips and portions 40 and 42 outwardly thereof and between the elasticized strips and the pad, while no pleats are formed in the crotch area 12 due at least in part to the sliding action of the top wadding member 28 relative to the pad 26. The top and bottom wadding sheets may be formed of paper or tissue. </div>

Claims

<div class="application article clearfix printTableText" id="claims"> WHAT WE CLAIM IS:

1. A disposable diaper comprising a backing sheet, an absorbent pad on said backing sheet, a top sheet overlying said absorbent pad, said top sheet being secured to said backing sheet on at least two opposite peripheral edges thereof, opposed elastic members secured to said backing sheet in at least the central portions of said two opposite peripheral edges to define crotch seals along the side edges of said diaper, said elastic members being less than 3/4 inch from said absorbent pad, the tension on said elastic members being such that there will be only pleats along said crotch seals and no pleats transversely of the crotch area of said diaper, said absorbent pad, being of an hour-glass shape defining ears spaced from said crotch area, a tissue wadding sheet overlying said pad, and at least a portion of said elastic members being secured to that part of said tissue wadding sheet overlying said ears.

2. A disposable diaper according to claim 1, wherein said top sheet and said backing sheet are bonded together along the peripheral edges thereof.

3. A disposable diaper according to claim 1, wherein said top sheet is heat sealed to said backing sheet.

4. A disposable diaper according to claim 1, wherein said tissue wadding sheet is movable relative to said absorbent pad to limit transverse pleats in said crotch area. vr-'iT c WEST-WALKER, McCABE per: R£C£rVT;D attorneys for the applicant -5- </div>