CA1100251A - Tape fastening system for disposable diaper - Google Patents
Tape fastening system for disposable diaperInfo
- Publication number
- CA1100251A CA1100251A CA201,999A CA201999A CA1100251A CA 1100251 A CA1100251 A CA 1100251A CA 201999 A CA201999 A CA 201999A CA 1100251 A CA1100251 A CA 1100251A
- Authority
- CA
- Canada
- Prior art keywords
- diaper
- surface portion
- front surface
- back surface
- fastener system
- 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
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
- A61F13/56—Supporting or fastening means
- A61F13/58—Adhesive tab fastener elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/14—Layer or component removable to expose adhesive
Abstract
IMPROVED TAPE FASTENING SYSTEM FOR DISPOSABLE DIAPER
Kenneth B. Buell ABSTRACT OF THE DISCLOSURE
An improved tape fastener system for stronger securement of a tape fastener to corners of a disposable diaper, especially for diapers having relatively weak and/or extensible members. The tape fastener system has several elements which are parallel and are attached to the front and back surface of the diaper. The tape has a generally Y-shaped cross-section with two legs fastened to a back corner of the diaper and the third leg available to attach to a front corner of the diaper.
Kenneth B. Buell ABSTRACT OF THE DISCLOSURE
An improved tape fastener system for stronger securement of a tape fastener to corners of a disposable diaper, especially for diapers having relatively weak and/or extensible members. The tape fastener system has several elements which are parallel and are attached to the front and back surface of the diaper. The tape has a generally Y-shaped cross-section with two legs fastened to a back corner of the diaper and the third leg available to attach to a front corner of the diaper.
Description
ACKGROUND OF T~E INVENTION
~ The use of pressure sensitive tape fasteners for securing the corners of a diaper is a well-known expedient in the art. In fact, an example of this type of device is described in U.S. Patent Reissue No. 26,151 entitled DISPOSABLE DIAPER which issued to Robert C. Duncan et al on January 31, 1967. The Duncan et al patent is commonly owned by the assignee of the present application.
Previous tape fasteners have, however, had a number of shortco~ings, one of which is that they are generally attached to only one surface of the diaper, generally the bac;s surface, and thus all the force exerted on the tape fa,~ener is directed to the single joint between the tap~ fastener and the back surface of the diaper.
- In addition, the most frcquently used diaper construc-tion places a relativel~ weak or extensible therr lastic 1 ~.
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a~
mat~rial on the back of the diaper. A back surface of this kind provides a generally uns-atisfactory-~ase for mountin~ a tape fastener. A tape fastener easily pulls out of such a back surface during the process of fasten-ing a diaper, thereby leaving a hole in the backsheetof the diaper and leaving the user with an unusable fastener.
Such a failure wherein the tape fastener produces - a hole in the backsheet is undesirable because the diaper is essentially not usable after this occurs. The back~
shèet is no longer moisture impervious and there is no ~ readily available means to fasten the diaper on the baby ;; since the tape fastener element has been destroyed and diaper pins are not usually kept on hand when diapers with tape fastening systems are used.
The manufacturer's joint, defined below, must be stronger than the user's joint, defined below, because the user puts ~.^re tensile fcrce on the tape syste~. in ~ ; the process of fastening the diaper than is put on the tape during wearing of the diaper. The user pulls hard on the tape fastener while fastening a diaper, and it is generally during fastening that a tape pulls out of the diaper. Prior art diapers are subject to the "pull-out" type failure.
SUM,~IARY OF THE INVENTION
The nature and substance of the invention will ~;~ be more readily appreciated after giving consideration - to its major aims and purposes. The principal objects of the invention are recited in the ensuing paragraphs in order to give a better appreciation of the important ; 30 aspcctC of the invention before describing the details of the preferred embodimcnt in later portions of the description.
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The major objcct o~ thc invcnt;.on is to provide an impr.oved ~ape fasteller system for a di.sposable diaper ich has a stronger manufacturer's jOill~, i.e., the attachment bett~een the fastenel^ tape and the diaper ~hich `is made by the r~lanufacturer.
Another object of the invention is the provision of an improved fastener system of the above character which distributes the load exerted on the tape fastener at the manufacturer's joint over a larger area.
A further object of the invention ~ 9 the provision of an improved fastener system of the above character wherein the tape fastener is attached to several different . materials in providi.ng the rnanufacturer's joint.
f An additional object of the invention is the pro-vision of an improved tape fastener system of the above character wherein the adhesive on the fastening portion is covered Cor a distance out~.~ar21~ from the edge of the diaper to reduce the potential adhesive exposure to an infant's leg during wearing.
These and other objects are achieved by providins an improved tape fastener system for a disposable-diaper having a back surface and a front surface ~herein the tape fastener system has a front surface portion, a first attachment means associated ~ith the front surface portion and the front surface of the diaper to attach the front surface portion to the front surface, a back surface portion of the tape fastener, a second attachment means associcted ~ith the back surface portion and the back surfac~ of the diaper to attacll the back surface portion to the back surface, a fastenin~J portion of the tape fastener, and a third attachment means associated ~ith .- .
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the fastening portion to attach the fastening portion to another part of the dia~er and thereby form the~user's joint, i.e., the joint made by the user when fitting and fastening a diaper to an infant. The front surface portion, the back surface portion and the fastening portion are joined and attached in an area of joinder adjacent the edge of the diaper so that the forces imposed on the fastening portion are transmitted to both front and ' back surfaces of the diaper.
BRIEF DESCRIPTION OF THE DRAWINGS
While the specification concludes with claims particularly pointing out and distinctly claiming the subject matter regarded as forming the present invention, it is believed the invention will be better understood from the following description taken in connection with the accompanying ~ra~ing in which Lhe t'lickness of som2 of the materials are exaggerated for clarity and in which:
Figure 1 is a fragmentary perspecti~e view of a corner of a disposable diaper to which the invention has , 20 been applied in one for,m;
Figure 2 is a fragmentary perspective view, par- , ; tially broken away, of a corner of a disposable diaper to which an alternate embodiment of the invention has been applied;
Figure 3 is a cross-sectio,n in elevation of the corner of the diaper taken on the line 3-3 of Figure- l;
, ]?igure 4 is a cross-section in elevation of the corner of the diaper taken on the line 4-4 of Figure 2;
~?igure 5 is a cross-section in elevation, similar to Figu~:es 3 and 4, sllowing an alternate diaper construc--tion with a tape fastener system of this invention;
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Figure 6 is a cross-section in elevation, similar to Figure 5, of an alternate embodiment of~a tape fas-tener system of this invention; and Figure 7 is a perspective view showing a form of a disposable diaper illustrating the improved tape fastener system when in use for holding adjoining diaper corners.
- DETAILED DESCRIPTION OF THE INVENTION
Pressure sensitive tape fasteners of the inven-tion are useful and beneficial when applied to conventional disposable diapers, particularly of the kind that have a plastic backing sheet. As an illustration of the kind o~- diaper to which the invention is very readily adapted, reference is again made to the above cited Duncan et al U.S. Patent Reissue No. 26,151. ~- -It will be apparent ~ o~ the fol-lowing description that the tape fastener illustrated and described herein may be applied to the corner of a diaper of that particular design and configuration.
On the other hand, it will be understood that the inven-tion is not limited to any specific diaper structure or configuration and the diaper of the Duncan et al patent is merely a typical example of the kind of diaper to which the present invention can be usefully applied.
Referring now to Figures 1 and 2 of the drawing, it wil] be noted that these vie~ts represent the bac~
corner portion 21 and 22 of a diaper in Figures 1 and
~ The use of pressure sensitive tape fasteners for securing the corners of a diaper is a well-known expedient in the art. In fact, an example of this type of device is described in U.S. Patent Reissue No. 26,151 entitled DISPOSABLE DIAPER which issued to Robert C. Duncan et al on January 31, 1967. The Duncan et al patent is commonly owned by the assignee of the present application.
Previous tape fasteners have, however, had a number of shortco~ings, one of which is that they are generally attached to only one surface of the diaper, generally the bac;s surface, and thus all the force exerted on the tape fa,~ener is directed to the single joint between the tap~ fastener and the back surface of the diaper.
- In addition, the most frcquently used diaper construc-tion places a relativel~ weak or extensible therr lastic 1 ~.
~; !
a~
mat~rial on the back of the diaper. A back surface of this kind provides a generally uns-atisfactory-~ase for mountin~ a tape fastener. A tape fastener easily pulls out of such a back surface during the process of fasten-ing a diaper, thereby leaving a hole in the backsheetof the diaper and leaving the user with an unusable fastener.
Such a failure wherein the tape fastener produces - a hole in the backsheet is undesirable because the diaper is essentially not usable after this occurs. The back~
shèet is no longer moisture impervious and there is no ~ readily available means to fasten the diaper on the baby ;; since the tape fastener element has been destroyed and diaper pins are not usually kept on hand when diapers with tape fastening systems are used.
The manufacturer's joint, defined below, must be stronger than the user's joint, defined below, because the user puts ~.^re tensile fcrce on the tape syste~. in ~ ; the process of fastening the diaper than is put on the tape during wearing of the diaper. The user pulls hard on the tape fastener while fastening a diaper, and it is generally during fastening that a tape pulls out of the diaper. Prior art diapers are subject to the "pull-out" type failure.
SUM,~IARY OF THE INVENTION
The nature and substance of the invention will ~;~ be more readily appreciated after giving consideration - to its major aims and purposes. The principal objects of the invention are recited in the ensuing paragraphs in order to give a better appreciation of the important ; 30 aspcctC of the invention before describing the details of the preferred embodimcnt in later portions of the description.
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~ ` ~
The major objcct o~ thc invcnt;.on is to provide an impr.oved ~ape fasteller system for a di.sposable diaper ich has a stronger manufacturer's jOill~, i.e., the attachment bett~een the fastenel^ tape and the diaper ~hich `is made by the r~lanufacturer.
Another object of the invention is the provision of an improved fastener system of the above character which distributes the load exerted on the tape fastener at the manufacturer's joint over a larger area.
A further object of the invention ~ 9 the provision of an improved fastener system of the above character wherein the tape fastener is attached to several different . materials in providi.ng the rnanufacturer's joint.
f An additional object of the invention is the pro-vision of an improved tape fastener system of the above character wherein the adhesive on the fastening portion is covered Cor a distance out~.~ar21~ from the edge of the diaper to reduce the potential adhesive exposure to an infant's leg during wearing.
These and other objects are achieved by providins an improved tape fastener system for a disposable-diaper having a back surface and a front surface ~herein the tape fastener system has a front surface portion, a first attachment means associated ~ith the front surface portion and the front surface of the diaper to attach the front surface portion to the front surface, a back surface portion of the tape fastener, a second attachment means associcted ~ith the back surface portion and the back surfac~ of the diaper to attacll the back surface portion to the back surface, a fastenin~J portion of the tape fastener, and a third attachment means associated ~ith .- .
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the fastening portion to attach the fastening portion to another part of the dia~er and thereby form the~user's joint, i.e., the joint made by the user when fitting and fastening a diaper to an infant. The front surface portion, the back surface portion and the fastening portion are joined and attached in an area of joinder adjacent the edge of the diaper so that the forces imposed on the fastening portion are transmitted to both front and ' back surfaces of the diaper.
BRIEF DESCRIPTION OF THE DRAWINGS
While the specification concludes with claims particularly pointing out and distinctly claiming the subject matter regarded as forming the present invention, it is believed the invention will be better understood from the following description taken in connection with the accompanying ~ra~ing in which Lhe t'lickness of som2 of the materials are exaggerated for clarity and in which:
Figure 1 is a fragmentary perspecti~e view of a corner of a disposable diaper to which the invention has , 20 been applied in one for,m;
Figure 2 is a fragmentary perspective view, par- , ; tially broken away, of a corner of a disposable diaper to which an alternate embodiment of the invention has been applied;
Figure 3 is a cross-sectio,n in elevation of the corner of the diaper taken on the line 3-3 of Figure- l;
, ]?igure 4 is a cross-section in elevation of the corner of the diaper taken on the line 4-4 of Figure 2;
~?igure 5 is a cross-section in elevation, similar to Figu~:es 3 and 4, sllowing an alternate diaper construc--tion with a tape fastener system of this invention;
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Figure 6 is a cross-section in elevation, similar to Figure 5, of an alternate embodiment of~a tape fas-tener system of this invention; and Figure 7 is a perspective view showing a form of a disposable diaper illustrating the improved tape fastener system when in use for holding adjoining diaper corners.
- DETAILED DESCRIPTION OF THE INVENTION
Pressure sensitive tape fasteners of the inven-tion are useful and beneficial when applied to conventional disposable diapers, particularly of the kind that have a plastic backing sheet. As an illustration of the kind o~- diaper to which the invention is very readily adapted, reference is again made to the above cited Duncan et al U.S. Patent Reissue No. 26,151. ~- -It will be apparent ~ o~ the fol-lowing description that the tape fastener illustrated and described herein may be applied to the corner of a diaper of that particular design and configuration.
On the other hand, it will be understood that the inven-tion is not limited to any specific diaper structure or configuration and the diaper of the Duncan et al patent is merely a typical example of the kind of diaper to which the present invention can be usefully applied.
Referring now to Figures 1 and 2 of the drawing, it wil] be noted that these vie~ts represent the bac~
corner portion 21 and 22 of a diaper in Figures 1 and
2, respectively, each corner po~tion having an absorp-tive body 23. The absorptive b~dy 23 has an absorptive core 2~l formed from any of the tell-~nown matexials having : .'-. .
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~ood moisturc absorbing characteristics such as absor-bent wadding, cellulosic fluff or the like. ~he a~sorptive body 23 may also include a topsheet 25 superposed over the absorptive core 24. The topsheet 25 may be any of the well-kno~n topsheets, for example, that topsheet described in the above cited Duncan et al patent which is a hydrophobic nonwoven material. These diapers gener-ally have a moisture impervious backsheet 26, some of - which are thin, flexible, extensible materials, such as 1-1/2 mil polyethylene film.
- Such a diaper has a back\surface 27 and a front surface 28. When a backsheet 26 is used, it forms the back surface 27 of the diaper. The front surface 28 , , .
is- that surface of the diaper opposite the back surface 27 and in the embodiment of Figure 1 is formed by the . topsheet 25. In general, the back surface of the diaper extends from one lateral edge to the other lateral edge : of the diaper and from one longitudinal end to the other longitudinal end of the diaper and is the surface furthest from a baby during wearing of a diaper. In general, the front surface 28 of the diaper is that area coextensive with the back surface 27 and which is for the greater part in contact witll an infant when the diaper is worn.
Referring again to Figures 1 and 2, several em-bodiments of the tape fastener system 29 of this invention are shcwn. This tape fastener system is one which is anchored to both the front surfcce 28 and the back surfa~e 27 of a diaper to create the "manufacturer's" joint, i.e., that at-tachment of the tape fast:ener system to the diaper made d~ring manufacture of the diaper. The tape fastene~
system has anothcr element whic~- forms the "user's" joint, i.e., that joint made by the person fitting and securing a diaper to an in1ant. The tape fasteller system 29 of this invention has at least three elements, which are the front surface portion 30, the back surface portion S 31, and the fastening portion 32. The front surface portion - 30 is that portion of the tape fastener system which is attached to the front surface 28 of the diaper. The back surface portion 31 is that portion of the tape fas-tener system which is attached to the back surface 27 of the diaper. The fastening portion 32 is that portion of the tape fastening system which is attached to another portion of the diaper, generally the front corner or adjacent corner 33 of a diaper such as is shown in Figure 7,'by the user ~hen securing a diaper on an infant after it is fitted to the infant. The fastening portion 32 is used in forming the user's joint. The front corner 33 is in contrast to the back corner 34 such as is shown in Figure 7. The back corner 34 and front corner 33 are designated as such in that they are a corner on the `
back portion and the front portion, respectively, of the diaper before the diaper is fitted to an infant.
The front surface portion 30, the back surface portion 31, and the fastening portion 32 meet and ~re joined in an area of joinder 57. The attachment between these three portions is strong in the area of joinder 57. Preferably, the attachment between the various com-ponents of the tape of this invention is subjected to shear stresses, rather than pecl strecses, when a tensile force away from lateral edge 40 of the diaper is put on fas-telling portion 32.
?a~2sl '' The stresses put on the area of joinder 57 are ~ shear stresses. When the tape is in its "in use" con-figuration, as is shown in Figure 7, the segments of the ' front surface portion 30, the back surface portion 31, -~' 5 and the ifastening portion 32 coextensive with the area : of joinder 57 are parallel with each other and each ' of the segments coextensive with the area of joinder :~ - 57 extend laterally outwardly from the first co~non . point of joinder 41 when the tape is in its"in use"
; 10 configuration.
` Looking at Figure 4 wherein the tape is shown - ; in substantially its "in use" configuration, the segments :' of the top surface portion 30 and. the ~ottom surface '- portion 31 (bottom surface portion 31 being integral " 15 with the' fastening portion 32) which are coextensive with the area of joinder 57 extend laterally outwardly, Y
- i.e., to the r-ght in Figure ~, frc~ the first co~.cn ~- point of joinder 41. In addition, the lower surface 58 of the front surface portion 30 is facing the upper surface S9 of the back surface portion 31 and the fas-tening portion 32, which are integral, in the region of ' the area of joinder 57. This structure puts the area of joinder 57 in shea'r when a tensile force is put on . the fastening portion 32 in contrast to a peel stress 25 which is put on the area of joinder in a tape system wherein the upper surface of the top surface portion is fac.ng the upper surface of the back surface portion such as is taught in U.S. Paten. 3,646,937, issued to Gellert on ~arch 7, 1972, and i:, commonly owned by the ; 30 assign~c of the prescnt applica~ion.
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Referring now to Fiy~lre 3, ~hich is a sec~ion of the diaper corller shown in Figure 1, additional detail of the tape fastener system 29 is shown. The backsheet 26 in this diaper embodiment is folded around and onto the top of the lateral edge 40 o~ the absorptive core 24 to form a side flap 3~. The side flap 39 is attached to the topsheet 25 by flap securement means 38.- The flap securement means 38 can be any of the adhesives well-known to those of ordinary skill in the art, such as hot melt glues and dou~le sided adhesive tapes.
The flap securement means 38 is generally parallel to and adjacent to the lateral edge 40 of the diaper as is well shown in Figure 1.
~ Figure 3 also shows attachment means for securing the tape fastener system to a diaper. These-attachment means are any of those which provide an adequate bond, , ` and preferably are any of the pressure sensitive adhe-sives well-known to those of ordinary skill in the adhesive . art. The front surface portion 30 is fixed to the front surface 28 of the diaper by a first attachment means 35. The back surface portion 31 is attached to the back surface 27 of the diaper by a second attachment means 36. The fastening portion 32 of the tape fastener system has a third attachment means 37 connected to and associated therewith. This third attachment means 37 forms a joint between the fasteninc3 portion 32 and a front corner 33 of a diaper when the diaper is in its "in use" configuration as shown in Figure 7.
Additional features may be incorporated with this improved tape fastener system. Referring now to Figtlre 4, thc first common point of joindcr ~1 for the : -- g _ front surface portion 30, back surface portion 31, and fastenin~ portion 32 of the tape fastener system 29 pre-- ferably lies in a plane midway between the front and bac~ surfaces of the diaper. The first common point of joinder 41 is, in general, the common meeting of the three basic tapè elements, the top surface portion, the back surface portion, and the fastening portion, nearest - the lateral edge 40 of the diaper. These portions of the tape system thus preferably come together at a point - 10 which is about equidistant from the front surface 28 and back surface 27 of the diaper. This provides equal -~ distribution of strain to both the front and back sur-faces of a diaper resulting from a force applied to the f~stening portion 32. Of course, if it is desirable to allocate the distribution of strain to the front and back surfaces of the diaper in some other manner, the first common point of joinder 41 can be positioned elsewhere, e.g., in the same plane as the front or back . surface of the diaper.
~eferring now to Figures 1 and 3, it is seen that - the fastening portion 32 with its associated third attach-ment means 37 is folded on top of the front surface portion 30 such that the fastening portion 32 is super-posed on the front surface portion 30. Since in the preferred embodiment the third attachment means 37 is one of the well-known pressure sensitive adhesives, ~; the upper surface 42 of the front surface portion 30 is preferably silicone treated ,o that it has moderate ~- adhesi~le attachment to the thir~ attachment means 37 and thereby provides a release-liner for the fastening portio~ 32 with its third attachment means 37.
~ hcn the fastell:ing portion 32 is superposed on the front sul-~ace portion 30 and the upper surface 42 of the front surface portion 30 is treated to provide a release liner, it is important that the third attach-ment means 37 be isolated from contacting any of thefront surface 28 of the diaper. This isolation is re-quired in order to provide easy releasability of the fastening portion 32 when the diaper is to be fitted and ~-secured to an infant. This isolation can be insured by making the area of the upper surface 42 at least`as great as- and coextensive with the areà of the third attachment means 37. In fact, it is desirable that the upper sur-face 42 or the front sur~ace portion 30 be somewhat larger than the effective area of the third attachment lS means 37. In Figures 1 and 3 it is shown that the front surface portion 30 is longer than fastening portion 32.
This structure forms a discontin~ity to provide a fas-tening portion 32 which is easier to grip and lift.
An alternate embodiment to that just described for protecting a third attachment means 37 until the diaper is to be attached to an infant is shown in Figures 2 and 4. In this embodiment, a separate,release liner 43 is provided to cover the third attachment means 37.
The release liner may be polyethylene or paper or any suitable equivalent thereof that will provide protec-tion. The release liner 43 is again treated on its surface whlch contacts the third attachment means 37 so that it has moderate adhesi~e attachment to the third attachllent means 37. A silicon,~ treatmcnt has been found :o provide this moderate ldhesive attachment witll p~essurc sensitive adhesiv-;~s.
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On some ~iapers the bac~sheet 26 has a narrow lateral margin folded around and over the ~lateral edge . 40 of the absorptive body 23 to form the side flap 39 shown in Figures 2 and 4. In this instance, it is pre-. 5 ferable that the side flap 39 be attached to the absorptive body 23 by flap securement means 38. In the attached figures, the side flap 39 is shown attached to the top-sheet 25. The flap securement means 38 can be any of those well-known to those of ordinary skill in the art, : 10 for example, double-sided tapes and hot melt glues.
In addition, when the diaper incorporates a side flap 39 superposed on the topsheet 25 such as is shown .
in Figures 2 and 4, it is desirable (but not essential i~ flap securement means 38 is used to provide a "support"
glue line) that the front surface portion 30 and its associated first attachment means 35 extend beyond the i~wara ~argin ~.~ of the side.fl~.p 39 and b~ in contact with the topsheet 25. Thus in a diaper having a side flap . 39 such as shown in Figures 2 and 4, the front surface portion 30 can be attached to only the side flap 39, only the topsheet 25, or both the side flap 39 and the topsheet 25.
Another refinement in diaper construction which provides a stronger diaper in connection with the im-proved tape fastenér system of this invention is shownin Figures 2 and 4. The topsheet 25 has a longitudinal dimens.ion longer than the longitudinal dimension of the absorptive core 2~. This greater length of the topsheet 25 is folded around an~ under the longitudinal end ~S of the absorptive core 24 to provide a folded under portion ~G of the topsheet 25. The folded under portion 46 form~ a waistband element, at the longitu-dinal cnd oE a diaper, which provides a strong member to which a fastening system can be attached. The folded under portion 46 traverses the width of the diaper and has a lon~itudinal length sufficient so that it is in-cluded between the front surface portion 30 and the back surface portion 31 of the tape fastener system 29 of this invention.
A waistband element can be formed by various other members as part of the absorptive body. For example, wet strength tissue or other layers, not shown in the ; drawing, having high tensile strength which underlie the absorptive core, i.e., on the side of the absorptive core opposite the topsheet, and extend across the width of the diaper could form a waistband element.
The additional strength available by providing a folded under portion 46 can be acquired by fastening the backsheet 26 to the folded under portion 46 with . tape support means 47. Tape support means 47 can be any a~tachment means compatible with both the backsheet 26 and the folded under portion 46 r such as hot melt glues. Tape support means 47 is positioned so that it falls within the area projected by the back surface portion 31 onto the folded under portion 46. A tape support means 47 is especially beneficial at the back corners of the diaper such as back corner 34.
The tape fastener system 29 of this invention can be constructed in several ways. Its- three main ~lcments, i.e., the front surface portion 30, the back surface portion 31, and thc fastenin~ portion 32, can ~ach be separate tapcs which mcet and are joined adjacent .
the lateral edcJe 40 of the diaper. ~ morc practical structure o~ ~.his tape fastener systent 29 is~one in which the fastening portion 32 and either the back surface portion 31 or the front surface portion 30 is an integral strip of tape material. If the fastening portion 32 is integral with the back surface.portion . . 31 as shown in the attached drawing, then the front sur~ace portion 30 is a separate element which is attached to.the combined fastening portion 32 and back surface portion 31 at the lateral edge 40 of the diaper. This is easily accomplished by mating the first attachment means 35 of the front surface portion 30 with the second attach~ent means 36 and the third attachment means 37, the second and third attachment means being generally the s~me when the fastening portion 32 and the back surface portion 31 are integral.
When the iront surface portion 30 and the fas-~ tening portion 32 are integral, the first attachment .: means 35 must be placed on one side of the tape while .~ the third attachment means 37 must be placed on the .~ 20 opposite side of the tape and the back surface portion 31 is joined with that tape adjacent the lateral edge 40 of the diaper : In many diaper constructions, for example, that taught in the above mentioned Duncan et al patent, the topsheet is one of the strongest, if not the strongest, compon~nt of the diaper. ~hen this is the cas~, thè
strong~st tape attachment can be achieved by insuring that the tape fastening system is attached either di-rectly or indirectly to the topsheet. A tape fastening ; 30 system can indirectly be attached to a topsheet through, for examplc, flap securement means 38 and tape support means q7.
~lac~z~i Another beneficial structure for a tape fastener system such 2S that of this invcntion, is shown in Figures 1 and 3. Tllis structure is a grip tab 48 at the distal end of the fastening portion 32. The grip tab 48 in this ` instance was formed by folding over a small margin of S the distal end of the fastening portion and attaching it to itself. This forms an end on the fastening portion 32 which is easier to grasp by the diaper user when the - diaper is to be fitted and attached to an infant. It is most beneficial when used with a fastening portion 32 10 which is superposed on the front surface portion 30.
Figures S and 6 show the tape fastener system 29 applied to an alternate diaper construction wherein the absorptive core 49-does not`extend to the lateral edges of the diaper and the lateral extension 50 of the 15 topsheet 51 is attached to the lateral extension 52 of the hacksheet 53 by sec~rement me~ns 54, e.g., hot mel' ' adhesives, double sided adhesive tapes, fusion of the t lateral extensions, etc., associated with the lateral .
extensions 50 and 52 for holding them together. In 20 this construction the front surface portion 55 and the back surface portion 56 of the tape fastener system can be attached to the respective diaper surfaces primarily in the lateral extension portion of the diaper as shown in Figure 5. In some instances, it is found to be ad-25 vantageous to ma~e the front suxface portion 55 longer in its transverse dimension, i.e., the dimension parallel to the widtll of the diaper, than the transverse dimen-sion ot~ the bac]c surface portion 56 as is shown in Figure J
6. Fo example, it may be desi^able that the front 30 surface portion 55 overlies som~ of the absorptive core _ 15 -~9 of the diaper such as is shown in Fi~ure 6 or that the froot surface portion cxtends bcyond an element --such as a side flap 39 in Figure 3 - which forms part of the front surface of the diaper. Thus, the trans-verse dimension of the front surface portion may belonger than the transverse dimension of the back surface portion; in fact, it may be at least about twice as long as the transverse dirnension of the back surface portion. ~l - 10 The preferred embodiment of this tape fastener system with regard to the locati~on of the first common point of joinder 41 is also shown in both Figures 5 and 6. This preferred embodiment is that the first common point of joinder 41 is adjacent to the lateral edge of the diaper and is substantially in a plane equidistant between `~ the front surface of the diaper and the back surface of the diaper. : -Any of the back surface portion, the front surface portion, or the fastening portion of this tape ~astener system and their attachment means can be pressure sen-sitive tapes as are well-known to those of ordinary skill in the art. ~ny of these pressure sensitive tapes are preferably a paperbacked tape but can also be any one of several well-known com~ercial types including types having a polyethylene backing. In either case, these tapes can be with or without reinforcing elements.
The pressure sensitive adhesive ~n these tapes is pre-ferably selected so that it will be least irxitating to a babyls tender skin.
Ln practice, thc back surEace portion and the fastenilg portion - as separate pieces or as an interral piece - and their associated attachment means may be a saturated creped paper tape having a pressure-sensi-tive adhesive tailored to bond to polyethylene, such as tape No. Y-9030 available from the Minnesota Mining and ~anufacturing Co. The front surface portion in the embodiment of Figure 1, i.e., having its upper surface treated to provide a release liner, and its associated attachment means can be a polypropylene film having a pressure sensitive adhesive tailored to bond to polyethylene and having a silicone release coating on its upper surface to provide easy release, such as tape No. Y-9376 or tape - No. Y-840 available from the Minneso~a Mining and Manufacturing Co.
~ Thus it is apparent that there has been provided, in accordance with the invention, an improved tape fas-tener system that fulLy satisfies the objects, aims, ` and ~dvæntagec set for_h above. ~hile the inventiGn has been described in conjunction with specific embodi-ments thereof, it is evldent that many alternatives, modifications, and variations will be apparent to thoseskilled in the art in light of the foregoing description.
Accordingly, it is intended to embrace all such alter-natives, modifications, and variations as fall within ~; the spirit and broad scope of the appended claims.
,
` 11~
~ood moisturc absorbing characteristics such as absor-bent wadding, cellulosic fluff or the like. ~he a~sorptive body 23 may also include a topsheet 25 superposed over the absorptive core 24. The topsheet 25 may be any of the well-kno~n topsheets, for example, that topsheet described in the above cited Duncan et al patent which is a hydrophobic nonwoven material. These diapers gener-ally have a moisture impervious backsheet 26, some of - which are thin, flexible, extensible materials, such as 1-1/2 mil polyethylene film.
- Such a diaper has a back\surface 27 and a front surface 28. When a backsheet 26 is used, it forms the back surface 27 of the diaper. The front surface 28 , , .
is- that surface of the diaper opposite the back surface 27 and in the embodiment of Figure 1 is formed by the . topsheet 25. In general, the back surface of the diaper extends from one lateral edge to the other lateral edge : of the diaper and from one longitudinal end to the other longitudinal end of the diaper and is the surface furthest from a baby during wearing of a diaper. In general, the front surface 28 of the diaper is that area coextensive with the back surface 27 and which is for the greater part in contact witll an infant when the diaper is worn.
Referring again to Figures 1 and 2, several em-bodiments of the tape fastener system 29 of this invention are shcwn. This tape fastener system is one which is anchored to both the front surfcce 28 and the back surfa~e 27 of a diaper to create the "manufacturer's" joint, i.e., that at-tachment of the tape fast:ener system to the diaper made d~ring manufacture of the diaper. The tape fastene~
system has anothcr element whic~- forms the "user's" joint, i.e., that joint made by the person fitting and securing a diaper to an in1ant. The tape fasteller system 29 of this invention has at least three elements, which are the front surface portion 30, the back surface portion S 31, and the fastening portion 32. The front surface portion - 30 is that portion of the tape fastener system which is attached to the front surface 28 of the diaper. The back surface portion 31 is that portion of the tape fas-tener system which is attached to the back surface 27 of the diaper. The fastening portion 32 is that portion of the tape fastening system which is attached to another portion of the diaper, generally the front corner or adjacent corner 33 of a diaper such as is shown in Figure 7,'by the user ~hen securing a diaper on an infant after it is fitted to the infant. The fastening portion 32 is used in forming the user's joint. The front corner 33 is in contrast to the back corner 34 such as is shown in Figure 7. The back corner 34 and front corner 33 are designated as such in that they are a corner on the `
back portion and the front portion, respectively, of the diaper before the diaper is fitted to an infant.
The front surface portion 30, the back surface portion 31, and the fastening portion 32 meet and ~re joined in an area of joinder 57. The attachment between these three portions is strong in the area of joinder 57. Preferably, the attachment between the various com-ponents of the tape of this invention is subjected to shear stresses, rather than pecl strecses, when a tensile force away from lateral edge 40 of the diaper is put on fas-telling portion 32.
?a~2sl '' The stresses put on the area of joinder 57 are ~ shear stresses. When the tape is in its "in use" con-figuration, as is shown in Figure 7, the segments of the ' front surface portion 30, the back surface portion 31, -~' 5 and the ifastening portion 32 coextensive with the area : of joinder 57 are parallel with each other and each ' of the segments coextensive with the area of joinder :~ - 57 extend laterally outwardly from the first co~non . point of joinder 41 when the tape is in its"in use"
; 10 configuration.
` Looking at Figure 4 wherein the tape is shown - ; in substantially its "in use" configuration, the segments :' of the top surface portion 30 and. the ~ottom surface '- portion 31 (bottom surface portion 31 being integral " 15 with the' fastening portion 32) which are coextensive with the area of joinder 57 extend laterally outwardly, Y
- i.e., to the r-ght in Figure ~, frc~ the first co~.cn ~- point of joinder 41. In addition, the lower surface 58 of the front surface portion 30 is facing the upper surface S9 of the back surface portion 31 and the fas-tening portion 32, which are integral, in the region of ' the area of joinder 57. This structure puts the area of joinder 57 in shea'r when a tensile force is put on . the fastening portion 32 in contrast to a peel stress 25 which is put on the area of joinder in a tape system wherein the upper surface of the top surface portion is fac.ng the upper surface of the back surface portion such as is taught in U.S. Paten. 3,646,937, issued to Gellert on ~arch 7, 1972, and i:, commonly owned by the ; 30 assign~c of the prescnt applica~ion.
~ .
" .
~la~
Referring now to Fiy~lre 3, ~hich is a sec~ion of the diaper corller shown in Figure 1, additional detail of the tape fastener system 29 is shown. The backsheet 26 in this diaper embodiment is folded around and onto the top of the lateral edge 40 o~ the absorptive core 24 to form a side flap 3~. The side flap 39 is attached to the topsheet 25 by flap securement means 38.- The flap securement means 38 can be any of the adhesives well-known to those of ordinary skill in the art, such as hot melt glues and dou~le sided adhesive tapes.
The flap securement means 38 is generally parallel to and adjacent to the lateral edge 40 of the diaper as is well shown in Figure 1.
~ Figure 3 also shows attachment means for securing the tape fastener system to a diaper. These-attachment means are any of those which provide an adequate bond, , ` and preferably are any of the pressure sensitive adhe-sives well-known to those of ordinary skill in the adhesive . art. The front surface portion 30 is fixed to the front surface 28 of the diaper by a first attachment means 35. The back surface portion 31 is attached to the back surface 27 of the diaper by a second attachment means 36. The fastening portion 32 of the tape fastener system has a third attachment means 37 connected to and associated therewith. This third attachment means 37 forms a joint between the fasteninc3 portion 32 and a front corner 33 of a diaper when the diaper is in its "in use" configuration as shown in Figure 7.
Additional features may be incorporated with this improved tape fastener system. Referring now to Figtlre 4, thc first common point of joindcr ~1 for the : -- g _ front surface portion 30, back surface portion 31, and fastenin~ portion 32 of the tape fastener system 29 pre-- ferably lies in a plane midway between the front and bac~ surfaces of the diaper. The first common point of joinder 41 is, in general, the common meeting of the three basic tapè elements, the top surface portion, the back surface portion, and the fastening portion, nearest - the lateral edge 40 of the diaper. These portions of the tape system thus preferably come together at a point - 10 which is about equidistant from the front surface 28 and back surface 27 of the diaper. This provides equal -~ distribution of strain to both the front and back sur-faces of a diaper resulting from a force applied to the f~stening portion 32. Of course, if it is desirable to allocate the distribution of strain to the front and back surfaces of the diaper in some other manner, the first common point of joinder 41 can be positioned elsewhere, e.g., in the same plane as the front or back . surface of the diaper.
~eferring now to Figures 1 and 3, it is seen that - the fastening portion 32 with its associated third attach-ment means 37 is folded on top of the front surface portion 30 such that the fastening portion 32 is super-posed on the front surface portion 30. Since in the preferred embodiment the third attachment means 37 is one of the well-known pressure sensitive adhesives, ~; the upper surface 42 of the front surface portion 30 is preferably silicone treated ,o that it has moderate ~- adhesi~le attachment to the thir~ attachment means 37 and thereby provides a release-liner for the fastening portio~ 32 with its third attachment means 37.
~ hcn the fastell:ing portion 32 is superposed on the front sul-~ace portion 30 and the upper surface 42 of the front surface portion 30 is treated to provide a release liner, it is important that the third attach-ment means 37 be isolated from contacting any of thefront surface 28 of the diaper. This isolation is re-quired in order to provide easy releasability of the fastening portion 32 when the diaper is to be fitted and ~-secured to an infant. This isolation can be insured by making the area of the upper surface 42 at least`as great as- and coextensive with the areà of the third attachment means 37. In fact, it is desirable that the upper sur-face 42 or the front sur~ace portion 30 be somewhat larger than the effective area of the third attachment lS means 37. In Figures 1 and 3 it is shown that the front surface portion 30 is longer than fastening portion 32.
This structure forms a discontin~ity to provide a fas-tening portion 32 which is easier to grip and lift.
An alternate embodiment to that just described for protecting a third attachment means 37 until the diaper is to be attached to an infant is shown in Figures 2 and 4. In this embodiment, a separate,release liner 43 is provided to cover the third attachment means 37.
The release liner may be polyethylene or paper or any suitable equivalent thereof that will provide protec-tion. The release liner 43 is again treated on its surface whlch contacts the third attachment means 37 so that it has moderate adhesi~e attachment to the third attachllent means 37. A silicon,~ treatmcnt has been found :o provide this moderate ldhesive attachment witll p~essurc sensitive adhesiv-;~s.
ll(~&~
On some ~iapers the bac~sheet 26 has a narrow lateral margin folded around and over the ~lateral edge . 40 of the absorptive body 23 to form the side flap 39 shown in Figures 2 and 4. In this instance, it is pre-. 5 ferable that the side flap 39 be attached to the absorptive body 23 by flap securement means 38. In the attached figures, the side flap 39 is shown attached to the top-sheet 25. The flap securement means 38 can be any of those well-known to those of ordinary skill in the art, : 10 for example, double-sided tapes and hot melt glues.
In addition, when the diaper incorporates a side flap 39 superposed on the topsheet 25 such as is shown .
in Figures 2 and 4, it is desirable (but not essential i~ flap securement means 38 is used to provide a "support"
glue line) that the front surface portion 30 and its associated first attachment means 35 extend beyond the i~wara ~argin ~.~ of the side.fl~.p 39 and b~ in contact with the topsheet 25. Thus in a diaper having a side flap . 39 such as shown in Figures 2 and 4, the front surface portion 30 can be attached to only the side flap 39, only the topsheet 25, or both the side flap 39 and the topsheet 25.
Another refinement in diaper construction which provides a stronger diaper in connection with the im-proved tape fastenér system of this invention is shownin Figures 2 and 4. The topsheet 25 has a longitudinal dimens.ion longer than the longitudinal dimension of the absorptive core 2~. This greater length of the topsheet 25 is folded around an~ under the longitudinal end ~S of the absorptive core 24 to provide a folded under portion ~G of the topsheet 25. The folded under portion 46 form~ a waistband element, at the longitu-dinal cnd oE a diaper, which provides a strong member to which a fastening system can be attached. The folded under portion 46 traverses the width of the diaper and has a lon~itudinal length sufficient so that it is in-cluded between the front surface portion 30 and the back surface portion 31 of the tape fastener system 29 of this invention.
A waistband element can be formed by various other members as part of the absorptive body. For example, wet strength tissue or other layers, not shown in the ; drawing, having high tensile strength which underlie the absorptive core, i.e., on the side of the absorptive core opposite the topsheet, and extend across the width of the diaper could form a waistband element.
The additional strength available by providing a folded under portion 46 can be acquired by fastening the backsheet 26 to the folded under portion 46 with . tape support means 47. Tape support means 47 can be any a~tachment means compatible with both the backsheet 26 and the folded under portion 46 r such as hot melt glues. Tape support means 47 is positioned so that it falls within the area projected by the back surface portion 31 onto the folded under portion 46. A tape support means 47 is especially beneficial at the back corners of the diaper such as back corner 34.
The tape fastener system 29 of this invention can be constructed in several ways. Its- three main ~lcments, i.e., the front surface portion 30, the back surface portion 31, and thc fastenin~ portion 32, can ~ach be separate tapcs which mcet and are joined adjacent .
the lateral edcJe 40 of the diaper. ~ morc practical structure o~ ~.his tape fastener systent 29 is~one in which the fastening portion 32 and either the back surface portion 31 or the front surface portion 30 is an integral strip of tape material. If the fastening portion 32 is integral with the back surface.portion . . 31 as shown in the attached drawing, then the front sur~ace portion 30 is a separate element which is attached to.the combined fastening portion 32 and back surface portion 31 at the lateral edge 40 of the diaper. This is easily accomplished by mating the first attachment means 35 of the front surface portion 30 with the second attach~ent means 36 and the third attachment means 37, the second and third attachment means being generally the s~me when the fastening portion 32 and the back surface portion 31 are integral.
When the iront surface portion 30 and the fas-~ tening portion 32 are integral, the first attachment .: means 35 must be placed on one side of the tape while .~ the third attachment means 37 must be placed on the .~ 20 opposite side of the tape and the back surface portion 31 is joined with that tape adjacent the lateral edge 40 of the diaper : In many diaper constructions, for example, that taught in the above mentioned Duncan et al patent, the topsheet is one of the strongest, if not the strongest, compon~nt of the diaper. ~hen this is the cas~, thè
strong~st tape attachment can be achieved by insuring that the tape fastening system is attached either di-rectly or indirectly to the topsheet. A tape fastening ; 30 system can indirectly be attached to a topsheet through, for examplc, flap securement means 38 and tape support means q7.
~lac~z~i Another beneficial structure for a tape fastener system such 2S that of this invcntion, is shown in Figures 1 and 3. Tllis structure is a grip tab 48 at the distal end of the fastening portion 32. The grip tab 48 in this ` instance was formed by folding over a small margin of S the distal end of the fastening portion and attaching it to itself. This forms an end on the fastening portion 32 which is easier to grasp by the diaper user when the - diaper is to be fitted and attached to an infant. It is most beneficial when used with a fastening portion 32 10 which is superposed on the front surface portion 30.
Figures S and 6 show the tape fastener system 29 applied to an alternate diaper construction wherein the absorptive core 49-does not`extend to the lateral edges of the diaper and the lateral extension 50 of the 15 topsheet 51 is attached to the lateral extension 52 of the hacksheet 53 by sec~rement me~ns 54, e.g., hot mel' ' adhesives, double sided adhesive tapes, fusion of the t lateral extensions, etc., associated with the lateral .
extensions 50 and 52 for holding them together. In 20 this construction the front surface portion 55 and the back surface portion 56 of the tape fastener system can be attached to the respective diaper surfaces primarily in the lateral extension portion of the diaper as shown in Figure 5. In some instances, it is found to be ad-25 vantageous to ma~e the front suxface portion 55 longer in its transverse dimension, i.e., the dimension parallel to the widtll of the diaper, than the transverse dimen-sion ot~ the bac]c surface portion 56 as is shown in Figure J
6. Fo example, it may be desi^able that the front 30 surface portion 55 overlies som~ of the absorptive core _ 15 -~9 of the diaper such as is shown in Fi~ure 6 or that the froot surface portion cxtends bcyond an element --such as a side flap 39 in Figure 3 - which forms part of the front surface of the diaper. Thus, the trans-verse dimension of the front surface portion may belonger than the transverse dimension of the back surface portion; in fact, it may be at least about twice as long as the transverse dirnension of the back surface portion. ~l - 10 The preferred embodiment of this tape fastener system with regard to the locati~on of the first common point of joinder 41 is also shown in both Figures 5 and 6. This preferred embodiment is that the first common point of joinder 41 is adjacent to the lateral edge of the diaper and is substantially in a plane equidistant between `~ the front surface of the diaper and the back surface of the diaper. : -Any of the back surface portion, the front surface portion, or the fastening portion of this tape ~astener system and their attachment means can be pressure sen-sitive tapes as are well-known to those of ordinary skill in the art. ~ny of these pressure sensitive tapes are preferably a paperbacked tape but can also be any one of several well-known com~ercial types including types having a polyethylene backing. In either case, these tapes can be with or without reinforcing elements.
The pressure sensitive adhesive ~n these tapes is pre-ferably selected so that it will be least irxitating to a babyls tender skin.
Ln practice, thc back surEace portion and the fastenilg portion - as separate pieces or as an interral piece - and their associated attachment means may be a saturated creped paper tape having a pressure-sensi-tive adhesive tailored to bond to polyethylene, such as tape No. Y-9030 available from the Minnesota Mining and ~anufacturing Co. The front surface portion in the embodiment of Figure 1, i.e., having its upper surface treated to provide a release liner, and its associated attachment means can be a polypropylene film having a pressure sensitive adhesive tailored to bond to polyethylene and having a silicone release coating on its upper surface to provide easy release, such as tape No. Y-9376 or tape - No. Y-840 available from the Minneso~a Mining and Manufacturing Co.
~ Thus it is apparent that there has been provided, in accordance with the invention, an improved tape fas-tener system that fulLy satisfies the objects, aims, ` and ~dvæntagec set for_h above. ~hile the inventiGn has been described in conjunction with specific embodi-ments thereof, it is evldent that many alternatives, modifications, and variations will be apparent to thoseskilled in the art in light of the foregoing description.
Accordingly, it is intended to embrace all such alter-natives, modifications, and variations as fall within ~; the spirit and broad scope of the appended claims.
,
Claims (25)
1. In a disposable diaper having a back surface and a front surface, an improved tape fastener system, comprising:
(a) a front surface portion;
(b) first attachment means associated with the front surface portion and the front surface of the diaper for attaching the front surface portion to the front surface;
(e) a back surface portion;
(d) second attachment means associated with the back surface portion and the back surface of the diaper for attaching the back surface portion to the back surface;
(e) a fastening portion; and (f) third attachment means associated with the fastening portion for attaching the fastening portion to another part of the diaper;
(g) the front surface portion, the back surface portion, and the fastening portion joined and attached in an area of joinder adjacent the edge of the diaper;
(h) whereby forces imposed on the fastening portion are transmitted to both the front and back surfaces of the diaper.
(a) a front surface portion;
(b) first attachment means associated with the front surface portion and the front surface of the diaper for attaching the front surface portion to the front surface;
(e) a back surface portion;
(d) second attachment means associated with the back surface portion and the back surface of the diaper for attaching the back surface portion to the back surface;
(e) a fastening portion; and (f) third attachment means associated with the fastening portion for attaching the fastening portion to another part of the diaper;
(g) the front surface portion, the back surface portion, and the fastening portion joined and attached in an area of joinder adjacent the edge of the diaper;
(h) whereby forces imposed on the fastening portion are transmitted to both the front and back surfaces of the diaper.
2. The improved tape fastener system of Claim 1 wherein the front surface portion is a release liner, the front surface portion having its upper surface treated to give it moderate adhesive attachment to the third attachment means, the fastening portion being superposed on the front surface portion, and the third attachment means being between thee front surface portion and the fastening portion, whereby the fastening portion is moderately held superposed on the front surface of the diaper.
3. The improved tape fastener system of Claim 2 wherein the first common point of joinder of the front surface portion, the back surface portion, and the fas-tening portion lies substantially in a plane midway between the front and back surface of the diaper.
4. The improved tape fastener system of Claim 3 wherein the back portion and the fastening portion are an integral strip of tape material.
5. The improved tape fastener system of Claim 4 wherein the three attachment means are pressure sen-sitive adhesives.
6. The improved tape fastener system of Claim 3 wherein the three attachment means are pressure sen-sitive adhesives.
7. The improved tape fastener system of Claim 2 wherein the back portion and the fastening portion are an integral strip of tape material.
8. The improved tape fastener system of Claim 7 wherein the three attachment means are pressure sen-sitive adhesives.
9. The improved tape fastener system of Claim 2 wherein the three attachment means are pressure sen-sitive adhesives.
10. The improved tape fastener system of Claim 1 wherein the first common point of joinder of the front surface portion, the back surface portion, and the fas-tening portion lies substantially in a plane midway between the front and back surface of the diaper.
11. The improved tape fastener system of Claim 10 wherein the back portion and the fastening portion are an integral strip of tape material.
12. The improved tape fastener system of Claim 11 wherein the three attachment means are pressure sen-sitive adhesives.
13. The improved tape fastener system of Claim 10 wherein the three attachment means are pressure sen-sitive adhesives.
14. The improved tape fastener system of Claim 1 wherein the back portion and the fastening portion are an integral strip of tape material.
15. The improved tape fastener system of Claim 14 wherein the three attachment means are pressure sen-sitive adhesives.
16. The improved tape fastener system of Claim 1 wherein the three attachment means are pressure sen-sitive adhesives.
17. The improved tape fastener system of Claim 1 wherein the transverse dimension of the front surface portion is longer than the transverse dimension of the back surface portion.
18. The improved tape fastener system of Claim 17 wherein the transverse dimension of the front surface portion is at least about twice as long as the trans-verse dimension of the back surface portion.
19. The improved tape fastener of Claim 1 wherein the attachment between the front surface portion, the back surface portion, and the fastening portion in the area of joinder is in shear when a tensile force is ap-plied to the fastening portion.
20. The improved tape fastener system of Claim 19 wherein the segments of the front surface portion, the back surface portion, and the fastening portion, which are coextensive with the area of joinder, are parallel and extend outwardly from the first common point of joinder of the tape portions.
21. A disposable diaper comprising:
(a) a thin, flexible, extensible backsheet;
(b) an absorptive body having an absorptive core and a topsheet superposed on the core, the absorptive body being super-posed on the backsheet so that the core is intermediate the topsheet and the backsheet;
(c) a tape fastener system having i. a front surface portion;
ii. first attzchrent means associated with the front surface portion and the front surface of the diaper for attaching the front surface portion - to the front surface;
iii. a back surface portion;
iv. second attachment means associated with the back surface portion and the back surface of the diaper for at-taching the back surface portion to the back surface;
v. a fastening portion;
vi. third attachment means associated with the fastening portion for attaching the fastening portion to another part of the diaper;
vii. the front surface portion, the back surface portion, and the fastening portion joined and attached in an area of joinder adjacent the edge of the diaper;
(d) whereby forces imposed on the fastening portion are transmitted to both the front and back surfaces of the diaper.
(a) a thin, flexible, extensible backsheet;
(b) an absorptive body having an absorptive core and a topsheet superposed on the core, the absorptive body being super-posed on the backsheet so that the core is intermediate the topsheet and the backsheet;
(c) a tape fastener system having i. a front surface portion;
ii. first attzchrent means associated with the front surface portion and the front surface of the diaper for attaching the front surface portion - to the front surface;
iii. a back surface portion;
iv. second attachment means associated with the back surface portion and the back surface of the diaper for at-taching the back surface portion to the back surface;
v. a fastening portion;
vi. third attachment means associated with the fastening portion for attaching the fastening portion to another part of the diaper;
vii. the front surface portion, the back surface portion, and the fastening portion joined and attached in an area of joinder adjacent the edge of the diaper;
(d) whereby forces imposed on the fastening portion are transmitted to both the front and back surfaces of the diaper.
22. The diaper of Claim 21 wherein tape support means for attaching the backsheet to the absorptive body is between the backsheet and the absorptive body, the tape support means being between the back surface portion and the absorptive body, whereby forces trans-mitted to the back surface portion are in turn transmitted through the backsheet to the absorptive body.
23. The diaper of Claim 22 wherein the topsheet has a longitudinal dimension longer than the longitudinal dimension of the absorptive core and the excess topsheet is folded around and under the longitudinal end of the core thereby forming a folded under portion, the folded under portion being intermediate the back surface portion of the tape fastener system and the absorptive core.
24. The diaper of Claim 22 wherein the front surface portion is attached to the topsheet.
25. The diaper of Claim 23 wherein the front surface portion is attached to the topsheet.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US374,188 | 1973-06-27 | ||
US00374188A US3848594A (en) | 1973-06-27 | 1973-06-27 | Tape fastening system for disposable diaper |
Publications (1)
Publication Number | Publication Date |
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CA1100251A true CA1100251A (en) | 1981-05-05 |
Family
ID=23475696
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA201,999A Expired CA1100251A (en) | 1973-06-27 | 1974-06-10 | Tape fastening system for disposable diaper |
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US (1) | US3848594A (en) |
JP (1) | JPS5234978B2 (en) |
AT (1) | AT344634B (en) |
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CA (1) | CA1100251A (en) |
CH (1) | CH580925A5 (en) |
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DK (1) | DK139293B (en) |
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FR (1) | FR2234868B1 (en) |
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IE (1) | IE39559B1 (en) |
IT (1) | IT1015515B (en) |
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NL (1) | NL174802B (en) |
NO (1) | NO138270C (en) |
SE (1) | SE400160B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105517522A (en) * | 2013-09-10 | 2016-04-20 | 尤妮佳股份有限公司 | Absorbent article |
Families Citing this family (583)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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US26151A (en) * | 1859-11-22 | Metal-planing machine | ||
US2400406A (en) * | 1944-06-21 | 1946-05-14 | Albert L Godoy | Closure for envelopes and the like |
US2714889A (en) * | 1953-04-13 | 1955-08-09 | Urey B Chambers | Diaper |
US2931747A (en) * | 1957-02-11 | 1960-04-05 | Fred F Dexter | Fabric fastener |
NL281020A (en) * | 1961-07-17 | 1900-01-01 | ||
USRE26151E (en) * | 1961-07-17 | 1967-01-31 | Disposable diaper | |
DE1611923A1 (en) * | 1967-03-15 | 1969-08-28 | Daiei Shikogyo Kabushiki Kaish | Duct tape set |
US3630201A (en) * | 1969-08-11 | 1971-12-28 | Kimberly Clark Co | Fastening arrangement for disposable diapers |
US3561446A (en) * | 1969-10-20 | 1971-02-09 | Jones Sr John L | Pleated diaper |
US3646937A (en) * | 1970-02-19 | 1972-03-07 | Procter & Gamble | Improved pressure-sensitive tape fastener for disposable diapers |
US3620217A (en) * | 1970-03-18 | 1971-11-16 | Procter & Gamble | Disposable diaper having pressure-sensitive tape fastener and built-in disposal fastener |
US3724466A (en) * | 1971-11-10 | 1973-04-03 | L Hendricks | Sanitary napkin |
US3794038A (en) * | 1972-10-16 | 1974-02-26 | Procter & Gamble | Disposable diaper with tape fastener having a release liner which also provides a means to grip and remove the topsheet |
-
1973
- 1973-06-27 US US00374188A patent/US3848594A/en not_active Expired - Lifetime
-
1974
- 1974-06-10 CA CA201,999A patent/CA1100251A/en not_active Expired
- 1974-06-19 NO NO742242A patent/NO138270C/en unknown
- 1974-06-25 AT AT524974A patent/AT344634B/en not_active IP Right Cessation
- 1974-06-25 MX MX152170A patent/MX146819A/en unknown
- 1974-06-26 IE IE1362/74A patent/IE39559B1/en unknown
- 1974-06-26 GB GB2828674A patent/GB1458566A/en not_active Expired
- 1974-06-26 BE BE145900A patent/BE816880A/en not_active IP Right Cessation
- 1974-06-26 CH CH874374A patent/CH580925A5/xx not_active IP Right Cessation
- 1974-06-26 FI FI1959/74A patent/FI56929C/en active
- 1974-06-26 FR FR7422313A patent/FR2234868B1/fr not_active Expired
- 1974-06-26 NL NLAANVRAGE7408585,A patent/NL174802B/en not_active Application Discontinuation
- 1974-06-26 SE SE7408403A patent/SE400160B/en not_active IP Right Cessation
- 1974-06-27 ES ES427759A patent/ES427759A1/en not_active Expired
- 1974-06-27 DK DK346174AA patent/DK139293B/en unknown
- 1974-06-27 JP JP49073764A patent/JPS5234978B2/ja not_active Expired
- 1974-06-27 DE DE2430881A patent/DE2430881C2/en not_active Expired
- 1974-06-28 IT IT7424573A patent/IT1015515B/en active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105517522A (en) * | 2013-09-10 | 2016-04-20 | 尤妮佳股份有限公司 | Absorbent article |
CN105517522B (en) * | 2013-09-10 | 2019-07-30 | 尤妮佳股份有限公司 | Absorbent commodity |
Also Published As
Publication number | Publication date |
---|---|
ES427759A1 (en) | 1976-08-01 |
DE2430881C2 (en) | 1985-09-26 |
GB1458566A (en) | 1976-12-15 |
FI56929C (en) | 1980-05-12 |
NO742242L (en) | 1975-01-20 |
DE2430881A1 (en) | 1975-01-23 |
IE39559B1 (en) | 1978-11-08 |
AT344634B (en) | 1978-08-10 |
ATA524974A (en) | 1977-12-15 |
IE39559L (en) | 1974-12-27 |
AU6993174A (en) | 1975-12-11 |
MX146819A (en) | 1982-08-25 |
FR2234868B1 (en) | 1976-12-24 |
FR2234868A1 (en) | 1975-01-24 |
DK346174A (en) | 1975-02-10 |
SE7408403L (en) | 1974-12-30 |
FI195974A (en) | 1974-12-28 |
DK139293C (en) | 1979-07-02 |
NO138270B (en) | 1978-05-02 |
NL7408585A (en) | 1974-12-31 |
CH580925A5 (en) | 1976-10-29 |
JPS5036254A (en) | 1975-04-05 |
JPS5234978B2 (en) | 1977-09-06 |
NO138270C (en) | 1978-08-09 |
US3848594A (en) | 1974-11-19 |
IT1015515B (en) | 1977-05-20 |
SE400160B (en) | 1978-03-20 |
DK139293B (en) | 1979-01-29 |
BE816880A (en) | 1974-12-27 |
FI56929B (en) | 1980-01-31 |
NL174802B (en) | 1984-03-16 |
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