CA1123151A - Crotch-shaped diaper and method - Google Patents
Crotch-shaped diaper and methodInfo
- Publication number
- CA1123151A CA1123151A CA233,967A CA233967A CA1123151A CA 1123151 A CA1123151 A CA 1123151A CA 233967 A CA233967 A CA 233967A CA 1123151 A CA1123151 A CA 1123151A
- Authority
- CA
- Canada
- Prior art keywords
- diaper
- pad assembly
- pad
- side edges
- edges
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 title claims description 5
- 230000002745 absorbent Effects 0.000 claims abstract description 25
- 239000002250 absorbent Substances 0.000 claims abstract description 25
- 239000012530 fluid Substances 0.000 claims abstract description 21
- 230000004888 barrier function Effects 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 3
- 239000000543 intermediate Substances 0.000 claims 10
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 210000002414 leg Anatomy 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
- A61F13/494—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means
- A61F13/49406—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means the edge leakage prevention means being at the crotch region
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
- A61F13/494—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means
- A61F13/49473—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means the edge leakage prevention means having a continuous closed form, e.g. circle, ellipse, rectangle
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
- A61F13/53409—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad having a folded core
- A61F13/53418—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad having a folded core having a C-folded cross-section
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
ABSTRACT
A disposable diaper comprising an absorbent pad assembly having a pair of side edges, a front surface, and a back surface. The diaper has a fluid impervious backing sheet having a pair of side edges and a width greater than the width of the pad assembly. The backing sheet covers the back surface of the pad assembly and has lateral side margins extending past the side edges of the pad assembly, the side margins of the backing sheet being folded over and secured to the front of the diaper with the side edges of the backing sheet being located in the proximity of the side edges of the pad assembly. The folded over side margins define side panels of the diaper which have recessed portions in the crotch region of the diaper to fit an infant's legs. The side panels are folded over and secured to the front surface of the pad assembly in the crotch region of the diaper.
A disposable diaper comprising an absorbent pad assembly having a pair of side edges, a front surface, and a back surface. The diaper has a fluid impervious backing sheet having a pair of side edges and a width greater than the width of the pad assembly. The backing sheet covers the back surface of the pad assembly and has lateral side margins extending past the side edges of the pad assembly, the side margins of the backing sheet being folded over and secured to the front of the diaper with the side edges of the backing sheet being located in the proximity of the side edges of the pad assembly. The folded over side margins define side panels of the diaper which have recessed portions in the crotch region of the diaper to fit an infant's legs. The side panels are folded over and secured to the front surface of the pad assembly in the crotch region of the diaper.
Description
3l~23~
The present invention relates to absorbent articles, and more particularly to disposable diapers.
A various assortment of disposable diapers have been proposed in the past for use on infants. Such diapers may usually be placed in two categories: (a) diapers having a rectangular shape and which may be partially unfolded when placed on the infant; and (b) diapers having a contoured shape to provide a better fit of the infant. Generally, it has been found difficult to provide the rectangular diapers with a comfortable fit for the infant, particularly in the crotch and thigh regions of the diaper, while the contoured diapers are often difficult to manufacture. In many cases, the irregular shape of the contoured diapers requires the use of complex and high-precision machinery to produce such diapers in high volume, thus adding to the cost of the diapers to the consumer. Moreover, it is desirable that contoured diapers prevent leakage when worn, and particularly in the crotch region of the diapers where fluid transmission to the diapers is at its greatest.
A principle feature of the present invention is the provision of a diaper of simplified constructionproviding an improved fit for an infant.
According to one aspect of the present invention there is provided a disposable diaper, comprising: an absorbent pad assembly having a pair of side edges, a pair of end edges, a front surface, and a back surface; a fluid impervious backing sheet having a pair of side edges and a width greater than the width of said pad assembly, said backing sheet covering the back surface of the pad assembly and having lateral side margins extending past the side edges of the pad assembly, said side margins of the backing sheet being folded over and secured to the front of the diaper with the side edges of the backing sheet being located in the proximity of the side edges of the pad assembly and with the folded over side margins defining side panels of the diaper, said side panels having a pair of slits intermediate the crotch region and end edges of the diaper forming displaced portions, said side panels with said displaced portions being folded over along longitudinally '~'1 ~l:123~S~
extending fold lines which are located intermediate the side edges of the pad assembly and secured to the front surface of the pad assembly in the crotch region of the diaper so as to be retained in the folded over state in the crotch region when the diaper is unfolded adjacent the end edges, thereby providing conformability of the diaper to the shape of an infant's legs.
A diaper constructed in this way has a contoured shape in the crotch region to fit the irregular contour of an infant's legs.
The use of a narrower pad than in the conventional rectangular diaper contributes to reduced bulk in the crotch region providing a more comfortable fit of the diaper for the infant.
The use of retaining panels of the backing sheet extending from side edges of the pad assembly for placement around the infant's waist provides for an improved fit of the diaper in the infant's waist region.
The diaper has fluid impervious barrier means overlying the pad assembly in the crotch region to reduce leakage from the diaper.
A further advantage of the diaper is that a reduced amount of fluid pervious top sheet and absorbent material is used in the pad assembly.
According to another aspect of the present invention there is provided a method for making a disposable diaper in a simplified manner comprising the steps of covering the back surface of an absorbent pad means with a fluid impervious backing sheet having a greater width than the pad ;
means; folding lateral side margins of the backing sheet along longitudinally extending fold lines intermediate side edges of the pad means and side edges of the backing sheet; securing edge portions of the folded side margins to a front surface of the pad means adjacent its side edges; slitting both folded side margins intermediate a crotch region and end edges of the diaper from said fold lines toward the side edges of said pad means defining recessed portions of the folded side margins; providing a barrier in the folded side . margins intermediate the side edges of the pad means and the slits to prevent leakage from the pad means through the slits; folding edge panels having said
The present invention relates to absorbent articles, and more particularly to disposable diapers.
A various assortment of disposable diapers have been proposed in the past for use on infants. Such diapers may usually be placed in two categories: (a) diapers having a rectangular shape and which may be partially unfolded when placed on the infant; and (b) diapers having a contoured shape to provide a better fit of the infant. Generally, it has been found difficult to provide the rectangular diapers with a comfortable fit for the infant, particularly in the crotch and thigh regions of the diaper, while the contoured diapers are often difficult to manufacture. In many cases, the irregular shape of the contoured diapers requires the use of complex and high-precision machinery to produce such diapers in high volume, thus adding to the cost of the diapers to the consumer. Moreover, it is desirable that contoured diapers prevent leakage when worn, and particularly in the crotch region of the diapers where fluid transmission to the diapers is at its greatest.
A principle feature of the present invention is the provision of a diaper of simplified constructionproviding an improved fit for an infant.
According to one aspect of the present invention there is provided a disposable diaper, comprising: an absorbent pad assembly having a pair of side edges, a pair of end edges, a front surface, and a back surface; a fluid impervious backing sheet having a pair of side edges and a width greater than the width of said pad assembly, said backing sheet covering the back surface of the pad assembly and having lateral side margins extending past the side edges of the pad assembly, said side margins of the backing sheet being folded over and secured to the front of the diaper with the side edges of the backing sheet being located in the proximity of the side edges of the pad assembly and with the folded over side margins defining side panels of the diaper, said side panels having a pair of slits intermediate the crotch region and end edges of the diaper forming displaced portions, said side panels with said displaced portions being folded over along longitudinally '~'1 ~l:123~S~
extending fold lines which are located intermediate the side edges of the pad assembly and secured to the front surface of the pad assembly in the crotch region of the diaper so as to be retained in the folded over state in the crotch region when the diaper is unfolded adjacent the end edges, thereby providing conformability of the diaper to the shape of an infant's legs.
A diaper constructed in this way has a contoured shape in the crotch region to fit the irregular contour of an infant's legs.
The use of a narrower pad than in the conventional rectangular diaper contributes to reduced bulk in the crotch region providing a more comfortable fit of the diaper for the infant.
The use of retaining panels of the backing sheet extending from side edges of the pad assembly for placement around the infant's waist provides for an improved fit of the diaper in the infant's waist region.
The diaper has fluid impervious barrier means overlying the pad assembly in the crotch region to reduce leakage from the diaper.
A further advantage of the diaper is that a reduced amount of fluid pervious top sheet and absorbent material is used in the pad assembly.
According to another aspect of the present invention there is provided a method for making a disposable diaper in a simplified manner comprising the steps of covering the back surface of an absorbent pad means with a fluid impervious backing sheet having a greater width than the pad ;
means; folding lateral side margins of the backing sheet along longitudinally extending fold lines intermediate side edges of the pad means and side edges of the backing sheet; securing edge portions of the folded side margins to a front surface of the pad means adjacent its side edges; slitting both folded side margins intermediate a crotch region and end edges of the diaper from said fold lines toward the side edges of said pad means defining recessed portions of the folded side margins; providing a barrier in the folded side . margins intermediate the side edges of the pad means and the slits to prevent leakage from the pad means through the slits; folding edge panels having said
- 2 -:, . ' ,.' : :.
~Z3~1l5~
recessed portions over the front surface of the pad means along spaced longitudinally extending fold lines in the pad means; and securing the edge panels to the front surface of the pad means intermediate the spaced fold lines.
In the accompanying drawings, which illustrate exemplary embodiments of the present invention:
Figure 1 is a perspective view of one embodiment of a diaper of the present invention, before final folding;
Figure 2 is a fragmentary sectional view taken substantially as indicated along the line 2-2 of Figure l;
Figures 3-5, and 7 are fragmentary plan views illustrating alterna-tive configurations of the diaper; and Figure 6 is a perspective view, taken in section, of the diaper of Figure 1 including the final fold.
Referring now to Figures 1-2, there is shown a disposable diaper generally designated 20 having an absorbent pad 22 and a fluid impervious bacxing sheet 24. The absorbent pad may have a rectangular shape, with a pair of side edges 26a and 26b, a pair of end edges 28a and 28b connecting the side edges 26a and b, and a back surface 30. The pad 22 may have a fluid pervious top sheet 32 covering the front of the absorbent pad and defining a front surface 34 for the pad. The diaper 20 has a pair of waistband portions 36a and 36b adjacent end edges 38a and 38b of the diaper, and a crotch portion 40 therebetween.
The backing sheet 24 has a greater width than the absorbent pad 22, and as illustrated in Figures 1-3, the backing sheet covers the back surface 30 of the absorbent pad, with lateral side margins 42a and 42b of the backing sheet extending past the side edges 26a and b of the pad 22. The side margins 42a and b of the backing sheet are folded over along fold lines 44a and 44b, and edge portions 46a and 46b of the side margins 42a and b are secured to the front surface of the pad assembly, such that side edges 48a
~Z3~1l5~
recessed portions over the front surface of the pad means along spaced longitudinally extending fold lines in the pad means; and securing the edge panels to the front surface of the pad means intermediate the spaced fold lines.
In the accompanying drawings, which illustrate exemplary embodiments of the present invention:
Figure 1 is a perspective view of one embodiment of a diaper of the present invention, before final folding;
Figure 2 is a fragmentary sectional view taken substantially as indicated along the line 2-2 of Figure l;
Figures 3-5, and 7 are fragmentary plan views illustrating alterna-tive configurations of the diaper; and Figure 6 is a perspective view, taken in section, of the diaper of Figure 1 including the final fold.
Referring now to Figures 1-2, there is shown a disposable diaper generally designated 20 having an absorbent pad 22 and a fluid impervious bacxing sheet 24. The absorbent pad may have a rectangular shape, with a pair of side edges 26a and 26b, a pair of end edges 28a and 28b connecting the side edges 26a and b, and a back surface 30. The pad 22 may have a fluid pervious top sheet 32 covering the front of the absorbent pad and defining a front surface 34 for the pad. The diaper 20 has a pair of waistband portions 36a and 36b adjacent end edges 38a and 38b of the diaper, and a crotch portion 40 therebetween.
The backing sheet 24 has a greater width than the absorbent pad 22, and as illustrated in Figures 1-3, the backing sheet covers the back surface 30 of the absorbent pad, with lateral side margins 42a and 42b of the backing sheet extending past the side edges 26a and b of the pad 22. The side margins 42a and b of the backing sheet are folded over along fold lines 44a and 44b, and edge portions 46a and 46b of the side margins 42a and b are secured to the front surface of the pad assembly, such that side edges 48a
- 3 -~: i ~23~
and 48b of the backing sheet are located intermediate the side edges 26a and b of the pad 22. The folded over side margins 42a and b define fluid imper-vious side panels 50a and 50b of the diaper, and the fold lines 44a and b define side edges of the side panels 50a and b. It is apparent that the fluid impervious edge portions 46a and b of the side margins 42a and b provide a fluid barrier adjacent the side edges of the absorbent pad 22 to prevent leakage from the pad.
The side panels 50a and b are cut along pairs of slits 52a and 52b from the side edges 44a and b of the side panels toward the absorbent pad 22, as shown, with the inner ends 60 of the slits 52a and b being spaced from the side edges 26a and b of the pad 22. The slits 52a and b are located intermediate the longitudinal mid-point of the diaper and the end edges 38a and b of the diaper, and preferably intermediate the crotch region 40 and end edges 38 a and b of the diaper. Preferably, the slits 52a and b define obtuse angles with the side edges 44a and b of the side panels 50a and b taken intermediate the slits and end edges of the diaper. The flaps 54a and 54b defined by the slits 52a and b in the side panels 50a and b, as shown in Figures 1, 2 and 5, may be folded along fold lines 53a and 53b over the front surface of the pad assembly. If desired, the flaps 54a and b may be secured in place on top of the pad assembly by suitable securing means 56a and 56b, such as adhesive. Alternatively, as shown in Figure 4, second slits 58 may be made in the side panels 50a and b between the inner ends 60 of the slits 52a and b and along the side edges 26a and b of the pad 22, such that the slits 58 and 52a and b extend around portions removed from the side panels and define cut-out portions 62 in the crotch region of the diaper. In either event, the cut-out portions 62 or folded over flaps 54a and b define recessed or displaced portions 64 of the side panels to provide a reduced width of the diaper in the crotch region.
The side panels are also provided with barrier means to prevent leakage through the slits. In a preferred embodiment, as shown in Figures p G ..'--~23~1LS~
3-5, the side panels 50a and b have longitudinally extending securement lines 66a and 66b adjacent the side edges 26a and b of the absorbent pad 22. The lines 66a and b are located intermediate the side edges 26a and b of the pad and the slits 52a and b or 58 to isolate the pad from the slits and prevent leakage from the pad through the slits. In a preferred form, the lines 66a and b comprise heat seal lines through the fluid impervious side panels, or lines of adhesive between the doubled side panels, as desired. Alternatively, the outer longitudinal ends of the lines may follow the slits 52a and b with lines 66a' and b', as shown in Figure 4. Thus, in the latter embodiment the sealing lines follow along the edges of the slits 58 and 52a and b. In either event, the sealing lines prevent leakage through the slits in the side panels.
An alternative embodiment of the diaper is illustrated in Figure 7, in which like reference numerals designate like parts. In this embodiment the side and end edges of t~e absorbent pad define a generally hour glass configuration of the pad, such that the pad has a pair of opposed sections 57 extending into the side panels 50a and b adjacent the waistband portions 36a and b. Thus, the sections 57 of the pad provide additional bulk to the side panels in the waistband portions, if needed, and may transmit liquid into pockets defined by the backing sheet in these regions of the diaper for retention therein.
As shown in Figure 1, the diaper may have conventional securing strips 70a and b extending from the retaining panels 68a and b for securing the diaper about the infant during placement.
As shown in Figure 6, the side panels 50a and b are folded over the front surface of the pad assembly along longitudinally extending fold lines 72a and 72b. The folcl lines 72a and b are preferably located intermediate the side edges 26a ancl b of the absorbent pad 22, such that the fold lines define longitudinally extending edge panels or flaps 74a and 74b which overlie the front surface 34 of a longitudinally extending central panel 76 of the . ~
. ~. , . , . ~
~23~5~
pad 22 intermediate the fold lines 72a and b. The edge panels 74a and b are secured to the front surface 34 of the central panel 76 by suitable means 78a and 78b, such as adhesive, in the crotch portion of the diaper.
As thus formed, the diaper of Figure 6 has side margins of the absorbent pad secured in overlying relationship to the central panel 76 of the absorbent pad 22. The backing sheet provides a fluid impervious outer or back surface of the edge panels 74a and b relative the front surface 34 of the pad 22, and the edge portions 46a and b and flaps 54a and b provide a double sealing barrier of the backing sheet intermediate the edge panels 74a and b and the front surface 34 of the central panel 76. Thus, leakage and wicking is prevented from the side edges 26a and b of the absorbent pad by the backing sheet, and particularly in the crotch region 40 of the diaper where fluid transmission to the diaper is at its greatest.
In use of the diaper, the retaining panels 68a and b extending from the edge panels 74a and b in the waistband portion of the diaper are unfolded preparatory to placement of the diaper on the infant. The edge panels 74a and b are retained by the securing means 78a and b to the front surface 34 of the central panel 76 in the crotch region 40 of the diaper to provide a contoured fit about the infant's legs. In addition, the flexible retaining panels 68a and b fit comfortably about the waistline of the infant. The diaper of Figure 6 thus provides an improved fit in the crotch and waist regions of the infant, and may be made in a simplified manner. Moreover, the diaper provides less bulk in the crotch region for added comfort to the infant, while preventing leakage in the crotch region due to the fluid barriers of the backing sheet about the edge panels 74a and b.
A method of making the diaper of the present invention has been described in connection with the diapers of Figures 1-6. According to the method, the back surface of the absorbent pad is covered with a fluid impervious backing sheet having a greater width than the pad. Next, lateral side margins of the backing sheet are folded along longitudinally extending ~: -~3~
fold lines intermediate side edges of the pad and side edges of the backing sheet. The edge portions of the folded side margins are secured to the front surface of the pad adjacent its side edges, and both of the folded side margins are slitted intermediate the crotch region and end edges of the diaper from the fold lines toward the side edges of the pad, defining recessed portions of the folded side margins. A barrier is then provided in the folded side margins intermediate the side edges of the pad and the slits to prevent leakage from the pad through the slits. Edge panels are folded over the front surface of the pad along spaced longitudinally extending fold lines in the pad, with the edge panels being secured to the front surface of the pad intermediate the spaced fold lines.
The foregoing detailed description is given for clearness of under-standing only, and no unnecessary limitations should be understood therefrom3 as modifications will be obvious to those skilled in the art.
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and 48b of the backing sheet are located intermediate the side edges 26a and b of the pad 22. The folded over side margins 42a and b define fluid imper-vious side panels 50a and 50b of the diaper, and the fold lines 44a and b define side edges of the side panels 50a and b. It is apparent that the fluid impervious edge portions 46a and b of the side margins 42a and b provide a fluid barrier adjacent the side edges of the absorbent pad 22 to prevent leakage from the pad.
The side panels 50a and b are cut along pairs of slits 52a and 52b from the side edges 44a and b of the side panels toward the absorbent pad 22, as shown, with the inner ends 60 of the slits 52a and b being spaced from the side edges 26a and b of the pad 22. The slits 52a and b are located intermediate the longitudinal mid-point of the diaper and the end edges 38a and b of the diaper, and preferably intermediate the crotch region 40 and end edges 38 a and b of the diaper. Preferably, the slits 52a and b define obtuse angles with the side edges 44a and b of the side panels 50a and b taken intermediate the slits and end edges of the diaper. The flaps 54a and 54b defined by the slits 52a and b in the side panels 50a and b, as shown in Figures 1, 2 and 5, may be folded along fold lines 53a and 53b over the front surface of the pad assembly. If desired, the flaps 54a and b may be secured in place on top of the pad assembly by suitable securing means 56a and 56b, such as adhesive. Alternatively, as shown in Figure 4, second slits 58 may be made in the side panels 50a and b between the inner ends 60 of the slits 52a and b and along the side edges 26a and b of the pad 22, such that the slits 58 and 52a and b extend around portions removed from the side panels and define cut-out portions 62 in the crotch region of the diaper. In either event, the cut-out portions 62 or folded over flaps 54a and b define recessed or displaced portions 64 of the side panels to provide a reduced width of the diaper in the crotch region.
The side panels are also provided with barrier means to prevent leakage through the slits. In a preferred embodiment, as shown in Figures p G ..'--~23~1LS~
3-5, the side panels 50a and b have longitudinally extending securement lines 66a and 66b adjacent the side edges 26a and b of the absorbent pad 22. The lines 66a and b are located intermediate the side edges 26a and b of the pad and the slits 52a and b or 58 to isolate the pad from the slits and prevent leakage from the pad through the slits. In a preferred form, the lines 66a and b comprise heat seal lines through the fluid impervious side panels, or lines of adhesive between the doubled side panels, as desired. Alternatively, the outer longitudinal ends of the lines may follow the slits 52a and b with lines 66a' and b', as shown in Figure 4. Thus, in the latter embodiment the sealing lines follow along the edges of the slits 58 and 52a and b. In either event, the sealing lines prevent leakage through the slits in the side panels.
An alternative embodiment of the diaper is illustrated in Figure 7, in which like reference numerals designate like parts. In this embodiment the side and end edges of t~e absorbent pad define a generally hour glass configuration of the pad, such that the pad has a pair of opposed sections 57 extending into the side panels 50a and b adjacent the waistband portions 36a and b. Thus, the sections 57 of the pad provide additional bulk to the side panels in the waistband portions, if needed, and may transmit liquid into pockets defined by the backing sheet in these regions of the diaper for retention therein.
As shown in Figure 1, the diaper may have conventional securing strips 70a and b extending from the retaining panels 68a and b for securing the diaper about the infant during placement.
As shown in Figure 6, the side panels 50a and b are folded over the front surface of the pad assembly along longitudinally extending fold lines 72a and 72b. The folcl lines 72a and b are preferably located intermediate the side edges 26a ancl b of the absorbent pad 22, such that the fold lines define longitudinally extending edge panels or flaps 74a and 74b which overlie the front surface 34 of a longitudinally extending central panel 76 of the . ~
. ~. , . , . ~
~23~5~
pad 22 intermediate the fold lines 72a and b. The edge panels 74a and b are secured to the front surface 34 of the central panel 76 by suitable means 78a and 78b, such as adhesive, in the crotch portion of the diaper.
As thus formed, the diaper of Figure 6 has side margins of the absorbent pad secured in overlying relationship to the central panel 76 of the absorbent pad 22. The backing sheet provides a fluid impervious outer or back surface of the edge panels 74a and b relative the front surface 34 of the pad 22, and the edge portions 46a and b and flaps 54a and b provide a double sealing barrier of the backing sheet intermediate the edge panels 74a and b and the front surface 34 of the central panel 76. Thus, leakage and wicking is prevented from the side edges 26a and b of the absorbent pad by the backing sheet, and particularly in the crotch region 40 of the diaper where fluid transmission to the diaper is at its greatest.
In use of the diaper, the retaining panels 68a and b extending from the edge panels 74a and b in the waistband portion of the diaper are unfolded preparatory to placement of the diaper on the infant. The edge panels 74a and b are retained by the securing means 78a and b to the front surface 34 of the central panel 76 in the crotch region 40 of the diaper to provide a contoured fit about the infant's legs. In addition, the flexible retaining panels 68a and b fit comfortably about the waistline of the infant. The diaper of Figure 6 thus provides an improved fit in the crotch and waist regions of the infant, and may be made in a simplified manner. Moreover, the diaper provides less bulk in the crotch region for added comfort to the infant, while preventing leakage in the crotch region due to the fluid barriers of the backing sheet about the edge panels 74a and b.
A method of making the diaper of the present invention has been described in connection with the diapers of Figures 1-6. According to the method, the back surface of the absorbent pad is covered with a fluid impervious backing sheet having a greater width than the pad. Next, lateral side margins of the backing sheet are folded along longitudinally extending ~: -~3~
fold lines intermediate side edges of the pad and side edges of the backing sheet. The edge portions of the folded side margins are secured to the front surface of the pad adjacent its side edges, and both of the folded side margins are slitted intermediate the crotch region and end edges of the diaper from the fold lines toward the side edges of the pad, defining recessed portions of the folded side margins. A barrier is then provided in the folded side margins intermediate the side edges of the pad and the slits to prevent leakage from the pad through the slits. Edge panels are folded over the front surface of the pad along spaced longitudinally extending fold lines in the pad, with the edge panels being secured to the front surface of the pad intermediate the spaced fold lines.
The foregoing detailed description is given for clearness of under-standing only, and no unnecessary limitations should be understood therefrom3 as modifications will be obvious to those skilled in the art.
!
~.....
Claims (20)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A disposable diaper, comprising: an absorbent pad assembly having a pair of side edges, a pair of end edges, a front surface, and a back sur-face; a fluid impervious backing sheet having a pair of side edges and a width greater than the width of said pad assembly, said backing sheet covering the back surface of the pad assembly and having lateral side margins extending past the side edges of the pad assembly, said side margins of the backing sheet being folded over and secured to the front of the diaper with the side edges of the backing sheet being located in the proximity of the side edges of the pad assembly and with the folded over side margins defining side panels of the diaper, said side panels having a pair of slits intermediate the crotch region and end edges of the diaper forming displaced portions, said side panels with said displaced portions being folded over along longitudinally extending fold lines which are located intermediate the side edges of the pad assembly and secured to the front surface of the pad assembly in the crotch region of the diaper so as to be retained in the folded over state in the crotch region when the diaper is unfolded adjacent the end edges, thereby providing conform-ability of the diaper to the shape of an infant's legs.
2. The diaper of claim 1 wherein said pad assembly includes a fluid pervious top sheet extending between the side edges of the absorbent pad assembly.
3. The diaper of claim 1 wherein edge portions of said backing sheet adjacent its side edges overlie the front surface of the pad assembly.
4. The diaper of claim 3 wherein said edge portions are secured to the front surface of said pad assembly.
5. The diaper of claim 1 including barrier means in said side panels preventing leakage through said recessed portions.
6. The diaper of claim 5 wherein said barrier means comprises heat seal lines in said side panels.
7. The diaper of claim 5 wherein said barrier means comprises sealing means in said side panels extending along the side edges of said pad assembly.
8. The diaper of claim 5 wherein said barrier means comprises sealing means extending along edges defined by said recessed portions.
9. The diaper of claim 1 wherein said pad assembly includes an absorbent pad having a generally rectangular shape.
10. The diaper of claim 1 wherein the pad assembly includes an absorbent pad having a pair of opposed sections extending into said side panels adjacent longitudinal ends of the diaper.
11. The diaper of claim 1 wherein said diaper has a pair of end edges connecting the side edges of the side panels, and each of said slits is located intermediate the longitudinal mid-point and an end edge of the diaper.
12. The diaper of claim 1 wherein said slits define obtuse angles with the side edges of the side panels taken intermediate the slits and end edges of the diaper.
13. The diaper of claim 1 wherein each of said side panels includes a second slit extending between the inner ends of said spaced slits, said spaced and second slits defining cut-out portions in the crotch region of the diaper.
14. The diaper of claim 1 wherein said spaced slits define flaps in said side panels, with said flaps being folded over the front surface of the pad assembly.
15. A disposable diaper, comprising: a generally rectangular absorbent pad assembly having a pair of side edges, a front surface, and a back surface;
a generally rectangular backing sheet having a pair of side edges and a width greater than the width of the pad assembly, said backing sheet covering the back surface of the pad assembly and having lateral side margins extending past the side edges of the pad assembly, said side margins comprising a double layer of fluid impervious sheet and having edge portions adjacent the side edges of the backing sheet secured to the front surface of the pad assembly, said double side margins defining side panels of the backing sheet extending on opposed sides of the pad assembly, said side panels having a pair of spaced slits intermediate the crotch region and end edges of the diaper at least partially defining displaced portions in the crotch region of the diaper;
barrier means in the side panels preventing leakage through said displaced portions; said side panels with said displaced portions being folded over the front surface of the pad assembly along longitudinally extending fold lines which are located intermediate the side edges of the pad assembly and defining fluid receiving pockets; and means for securing the side panels to the front surface of the pad assembly in the crotch region of the diaper.
a generally rectangular backing sheet having a pair of side edges and a width greater than the width of the pad assembly, said backing sheet covering the back surface of the pad assembly and having lateral side margins extending past the side edges of the pad assembly, said side margins comprising a double layer of fluid impervious sheet and having edge portions adjacent the side edges of the backing sheet secured to the front surface of the pad assembly, said double side margins defining side panels of the backing sheet extending on opposed sides of the pad assembly, said side panels having a pair of spaced slits intermediate the crotch region and end edges of the diaper at least partially defining displaced portions in the crotch region of the diaper;
barrier means in the side panels preventing leakage through said displaced portions; said side panels with said displaced portions being folded over the front surface of the pad assembly along longitudinally extending fold lines which are located intermediate the side edges of the pad assembly and defining fluid receiving pockets; and means for securing the side panels to the front surface of the pad assembly in the crotch region of the diaper.
16. The diaper of claim 15 wherein said side panels include a second slit extending between inner ends of said spaced slits and defining cut-out portions in the crotch region of the diaper.
17. The diaper of claim 15 wherein said spaced slits define a pair of flaps in said side panels, said flaps being folded over the front surface of the pad assembly.
18. A method of making a disposable diaper, comprising the steps of:
covering the back surface of an absorbent pad means with a fluid impervious backing sheet having a greater width than the pad means; folding lateral side margins of the backing sheet along longitudinally extending fold lines intermediate side edges of the pad means and side edges of the backing sheet;
securing edge portions of the folded side margins to a front surface of the pad means adjacent its side edges; slitting both folded side margins intermed-iate a crotch region and end edges of the diaper from said fold lines toward the side edges of said pad means defining recessed portions of the folded side margins; providing a barrier in the folded side margins intermediate the side edges of the pad means and the slits to prevent leakage from the pad means through the slits; folding edge panels having said recessed portions over the front surface of the pad means along spaced longitudinally extending fold lines in the pad means; and securing the edge panels to the front surface of the pad means intermediate the spaced fold lines.
covering the back surface of an absorbent pad means with a fluid impervious backing sheet having a greater width than the pad means; folding lateral side margins of the backing sheet along longitudinally extending fold lines intermediate side edges of the pad means and side edges of the backing sheet;
securing edge portions of the folded side margins to a front surface of the pad means adjacent its side edges; slitting both folded side margins intermed-iate a crotch region and end edges of the diaper from said fold lines toward the side edges of said pad means defining recessed portions of the folded side margins; providing a barrier in the folded side margins intermediate the side edges of the pad means and the slits to prevent leakage from the pad means through the slits; folding edge panels having said recessed portions over the front surface of the pad means along spaced longitudinally extending fold lines in the pad means; and securing the edge panels to the front surface of the pad means intermediate the spaced fold lines.
19. The method of claim 18 including the step of further slitting the folded side margins generally parallel to and spaced from the side edges of the pad means to define cut-out portions of the side margins.
20. The method of claim 18 including the step of folding flaps in the side margins defined by the slitting step over the front surface of the pad means.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US509978A US3920017A (en) | 1974-09-27 | 1974-09-27 | Crotch-shaped diaper and method |
US509,978 | 1990-04-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1123151A true CA1123151A (en) | 1982-05-11 |
Family
ID=24028868
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA233,967A Expired CA1123151A (en) | 1974-09-27 | 1975-08-22 | Crotch-shaped diaper and method |
Country Status (20)
Country | Link |
---|---|
US (1) | US3920017A (en) |
JP (1) | JPS6127481B2 (en) |
AT (1) | AT363415B (en) |
AU (1) | AU507491B2 (en) |
BE (1) | BE833461A (en) |
BR (1) | BR7505848A (en) |
CA (1) | CA1123151A (en) |
CH (1) | CH592422A5 (en) |
DE (1) | DE2541735C2 (en) |
DK (1) | DK141804B (en) |
ES (1) | ES226796U (en) |
FR (1) | FR2285820A1 (en) |
GB (1) | GB1524384A (en) |
IE (1) | IE43647B1 (en) |
IT (1) | IT1047060B (en) |
MX (1) | MX3838E (en) |
NL (1) | NL180270C (en) |
PH (1) | PH13053A (en) |
SE (1) | SE402519B (en) |
ZA (1) | ZA755287B (en) |
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US5509915A (en) | 1991-09-11 | 1996-04-23 | Kimberly-Clark Corporation | Thin absorbent article having rapid uptake of liquid |
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- 1974-09-27 US US509978A patent/US3920017A/en not_active Expired - Lifetime
-
1975
- 1975-08-18 ZA ZA755287A patent/ZA755287B/en unknown
- 1975-08-19 SE SE7509243A patent/SE402519B/en not_active IP Right Cessation
- 1975-08-22 CA CA233,967A patent/CA1123151A/en not_active Expired
- 1975-08-29 DK DK388875AA patent/DK141804B/en not_active IP Right Cessation
- 1975-09-03 AU AU84483/75A patent/AU507491B2/en not_active Ceased
- 1975-09-11 BR BR7505848*A patent/BR7505848A/en unknown
- 1975-09-11 IT IT51296/75A patent/IT1047060B/en active
- 1975-09-12 FR FR7528060A patent/FR2285820A1/en active Granted
- 1975-09-12 JP JP50110832A patent/JPS6127481B2/ja not_active Expired
- 1975-09-16 BE BE160078A patent/BE833461A/en not_active IP Right Cessation
- 1975-09-16 GB GB38009/75A patent/GB1524384A/en not_active Expired
- 1975-09-18 MX MX75100494U patent/MX3838E/en unknown
- 1975-09-19 DE DE2541735A patent/DE2541735C2/en not_active Expired
- 1975-09-22 PH PH17603A patent/PH13053A/en unknown
- 1975-09-24 AT AT0730275A patent/AT363415B/en not_active IP Right Cessation
- 1975-09-26 CH CH1251275A patent/CH592422A5/xx not_active IP Right Cessation
- 1975-09-26 IE IE2110/75A patent/IE43647B1/en unknown
- 1975-09-26 NL NLAANVRAGE7511407,A patent/NL180270C/en not_active IP Right Cessation
-
1977
- 1977-03-01 ES ES1977226796U patent/ES226796U/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5509915A (en) | 1991-09-11 | 1996-04-23 | Kimberly-Clark Corporation | Thin absorbent article having rapid uptake of liquid |
Also Published As
Publication number | Publication date |
---|---|
DK141804C (en) | 1980-11-10 |
CH592422A5 (en) | 1977-10-31 |
DE2541735C2 (en) | 1985-10-03 |
PH13053A (en) | 1979-11-21 |
SE7509243L (en) | 1976-03-29 |
BE833461A (en) | 1976-01-16 |
NL180270B (en) | 1986-09-01 |
JPS5158160A (en) | 1976-05-21 |
AT363415B (en) | 1981-08-10 |
DK388875A (en) | 1976-03-28 |
JPS6127481B2 (en) | 1986-06-25 |
MX3838E (en) | 1981-08-05 |
FR2285820A1 (en) | 1976-04-23 |
AU8448375A (en) | 1977-03-10 |
SE402519B (en) | 1978-07-10 |
DE2541735A1 (en) | 1976-04-08 |
IT1047060B (en) | 1980-09-10 |
NL180270C (en) | 1987-02-02 |
ZA755287B (en) | 1977-03-30 |
ATA730275A (en) | 1981-01-15 |
NL7511407A (en) | 1976-03-30 |
DK141804B (en) | 1980-06-23 |
ES226796U (en) | 1977-05-16 |
IE43647B1 (en) | 1981-04-22 |
GB1524384A (en) | 1978-09-13 |
IE43647L (en) | 1976-03-27 |
FR2285820B1 (en) | 1980-01-11 |
US3920017A (en) | 1975-11-18 |
AU507491B2 (en) | 1980-02-14 |
BR7505848A (en) | 1976-08-03 |
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Legal Events
Date | Code | Title | Description |
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MKEX | Expiry |