WO2004024193A2 - Ergonomic tampon applicator - Google Patents

Ergonomic tampon applicator Download PDF

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Publication number
WO2004024193A2
WO2004024193A2 PCT/US2003/028181 US0328181W WO2004024193A2 WO 2004024193 A2 WO2004024193 A2 WO 2004024193A2 US 0328181 W US0328181 W US 0328181W WO 2004024193 A2 WO2004024193 A2 WO 2004024193A2
Authority
WO
WIPO (PCT)
Prior art keywords
tampon applicator
section
barrel
plunger
taper
Prior art date
Application number
PCT/US2003/028181
Other languages
French (fr)
Other versions
WO2004024193A3 (en
Inventor
Jessica E. Lemay
Kathryn G. Bennett
Keith J. Edgett
Dane R. Jackson
Mario A. Turchi
Susanne Weber
Original Assignee
Playtex Products, Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=31991411&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2004024193(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Playtex Products, Inc. filed Critical Playtex Products, Inc.
Priority to CA2498508A priority Critical patent/CA2498508C/en
Priority to EP03754471.5A priority patent/EP1545418B1/en
Priority to JP2004536364A priority patent/JP4409434B2/en
Priority to MXPA05002767A priority patent/MXPA05002767A/en
Priority to AU2003272295A priority patent/AU2003272295A1/en
Priority to MX2015000079A priority patent/MX370997B/en
Publication of WO2004024193A2 publication Critical patent/WO2004024193A2/en
Publication of WO2004024193A3 publication Critical patent/WO2004024193A3/en

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
    • A61F13/20—Tampons, e.g. catamenial tampons; Accessories therefor
    • A61F13/26—Means for inserting tampons, i.e. applicators
    • A61F13/266—Insertion devices, e.g. rods or plungers, separate from the tampon
    • 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
    • A61F13/20—Tampons, e.g. catamenial tampons; Accessories therefor
    • A61F13/26—Means for inserting tampons, i.e. applicators
    • 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
    • A61F13/20—Tampons, e.g. catamenial tampons; Accessories therefor
    • A61F13/2077—Tampons, e.g. catamenial tampons; Accessories therefor having a visual effect, e.g. printed or embossed
    • 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
    • A61F13/20—Tampons, e.g. catamenial tampons; Accessories therefor
    • A61F13/26—Means for inserting tampons, i.e. applicators
    • A61F13/263—Means for inserting tampons, i.e. applicators with reduced length before use, e.g. with folding rod
    • 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
    • A61F13/20—Tampons, e.g. catamenial tampons; Accessories therefor
    • A61F13/34—Means for withdrawing tampons, e.g. withdrawal strings
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S604/00—Surgery
    • Y10S604/904—Tampons

Definitions

  • the present invention relates generally to an improved tampon or tampon applicator. More particularly, the present invention relates to a tampon applicator with a barrel that has a reverse taper section for improved ease of use and user comfort.
  • tampon applicators typically consist of a barrel and a plunger used to expel an absorbent pledget housed in the barrel.
  • the barrel is typically sub-divided into three sections, namely a finger grip, an insertion tip, and a main body section, which is located between the finger grip and insertion tip sections.
  • the finger grip section is typically the same diameter as the main body section of the barrel, but some designs (e.g., Playtex® Gentle Glide®) have a reduced diameter grip for improve grippability.
  • the main body section is typically linear, except on plastic molded barrels where there is a slight taper to improve release characteristics from the manufacturing mold.
  • the insertion tip section on some types of barrels have "petals" which curve over and enclose the pledget (i.e., rounded tip) housed in the barrel, but readily flex outwardly as the pledget is expelled through the insertion tip.
  • the barrel has four distinct sections, namely a finger grip section, a reverse taper section, a main body section, and an insertion tip section.
  • the reverse taper section is tapered towards the fingergrip section, and the main body section is tapered in an opposite direction towards the insertion tip section.
  • a maximum diameter is formed where the reverse taper section and main body section meet on the barrel. The maximum diameter provides a sensory indicator to the user to alert the user when the applicator has been inserted to the proper depth in the vagina.
  • Fig. 1 is a plan view of a tampon applicator of the present invention
  • Fig. 2 is a cut away view of the tampon applicator of Fig. 1 depicting an absorbent pledget housed in the barrel;
  • Fig. 3 is a cut away view of the tampon applicator of Fig. 2 after the pledget has been expelled from the barrel.
  • FIG. 1 there is shown an ergonomically improved tampon applicator according to the present invention generally represented by reference numeral 10.
  • the ergonomically improved applicator 10 is easier to use and more comfortable to insert and remove.
  • Applicator 10 includes a plunger 12 and a barrel 14.
  • Barrel 14 may be divided into four sections, as opposed to three sections typically found in prior art tampon applicators.
  • the four sections include a finger grip section 16, a reverse taper section 18, a main body section 20, and an insertion tip section 22.
  • Finger grip section 16 is bound by a forward edge ridge 24 and a rearward edge ridge 26.
  • Forward edge ridge 24 provides a firm grip surface during insertion of applicator 10 into the vaginal vault.
  • Rearward edge ridge 26 provides a firm grip surface during expulsion of the pledget (not shown) and during removal of applicator 10 from the body.
  • Forward and rearward edge ridges 24, 26 are about 6 mm to about 22 mm in diameter.
  • the forward and rearward edges 24, 26 are about 11 mm to about 17 mm in diameter, with about 14 mm being the most preferred diameter.
  • a finger accepting region 28 is formed between forward edge ridge 24 and rearward edge ridge 26. To ensure an adequate area to accept a user's finger or fingers, forward edge ridge 24 and rearward edge ridge 26 are spaced about 13 mm to about 40 mm apart. More preferably, forward edge ridge 24 and rearward edge ridge 26 are spaced about 17 mm to about 21 mm apart, with about 19 mm being the most preferred spacing. Finger accepting region 28 may be concave, convex, flat, or any combinations thereof. Preferably, region 28 is concave, which conforms to the contour of a user's finger. The maximum diameter of region 28 is preferably slightly less than the diameter of edge ridges 24, 26.
  • region 28 has a maximum to minimum diameter ratio of about 1.10 to about 1.75, with a more preferred ratio of about 1.25 to about 1.35.
  • Finger accepting region 28 may also include one or more gripping structures 46 to improve grippability of applicator 10.
  • Suitable gripping structures 46 include, for example, one or more and preferably two or more, embossments, protuberances, slits, grooves, louvers, perforations, lances, abrasive medias, high wet coefficient of friction materials, pressure sensitive adhesives, or any combinations thereof.
  • gripping structures 46 may be formed in any shape, including, for example, arc, circle, concave, cone, convex, diamond, line, oval, polygon, rectangle, rib, square, triangle, or any combinations thereof.
  • the maximum diameter 34 of applicator barrel 14 occurs at the forward end of reverse taper section 18.
  • Reverse taper is meant to include a taper in the reverse direction, i.e. in a direction away from the insertion end of applicator 10, but not necessarily the same dimensional taper as main body section 20.
  • the diameter of reverse taper section 18 tapers down toward forward edge ridge 24, where the diameter is equal to or slightly less than the diameter of forward edge ridge 24. This taper may be linear or curvilinear.
  • Maximum diameter 34 of barrel 14 exerts a slightly greater pressure than the smaller diameter portions of the barrel on the vaginal opening. This unique feature of barrel 14 provides a sensually perceivable way of signaling or indicating to a user that applicator 10 has been inserted to the correct depth in the vagina.
  • the location of maximum diameter 34 along the length of barrel 14 is a critical aspect of the present invention.
  • the location of maximum diameter 34 on barrel 14 is about 32 mm to about 54 mm in the axial direction of barrel 14 from forward end 36 of insertion tip 22.
  • maximum diameter 34 is located about 40 mm to about 50 mm, and more preferably about 44 mm in the axial direction of barrel 14 from forward end 36j of insertion tip 22.
  • Main body section 20 is joined to reverse taper section 18 where maximum diameter 34 of barrel 14 is located.
  • Main body section 20 tapers toward insertion tip section 22 in either a linear or curvilinear fashion so that its smallest diameter occurs where main body section 20 meets insertion tip section 22.
  • the ratio of maximum diameter 34 to the diameter at the forward end 38 of main body section 20 is about 1.1 to about 1.5, and more preferably about 1.2 to about 1.3.
  • This tapering of main body section 20 facilitates insertion comfort by gradually parting the vulva-vaginal channel over a longer length than that of only insertion tip section 22.
  • Insertion tip section 22 begins where there is a substantial change in the curvature of the forward portion of the barrel that is where the pledget- enclosing petals 40 are formed.
  • insertion tip 22 is the forward edge of the main body section 20 of barrel 14.
  • the preferred insertion tip 22 is the petal type with a curvature that approximates an elliptical or hyperbolic curve.
  • insertion tip 22 has about 2 to about 12 petals, and more preferably about 3 to about 8 petals.
  • the ratio of the maximum diameter of insertion tip section 22, which occurs at the plane where its rearward edge meets forward end 38 of main body section 20, to the total axial length of the insertion tip section along a horizontal axis of applicator 10, is about 0.9 to about 1.8, and more preferably about 1.1 to about 1.3.
  • tampon applicator barrel 14 of the present invention is depicted as having four sections, namely a finger grip section, a reverse taper section, a main body section, and an insertion tip section, the tampon applicator barrel can include a reverse taper section and at least one additional section selected from a finger grip section, a main body section, an insertion tip section, or any combinations thereof.
  • the interior wall of barrel 14 that houses the pledget may have the same basic sidewall shape as its exterior wall. However, molding such a complicated interior wall requires a complex manufacturing process. Alternately, the interior wall can be practically straight walled (a slight taper may be required for tooling release) while the exterior wall has the sectional shapes discussed before, thus simplifying the molding process.
  • barrel 14 has a finger grip end 42.
  • Plunger 12 telescopically fits into the finger grip end 42 of barrel 14.
  • Plunger 12 has a diameter slightly smaller than the smallest diameter of finger receiving region 28 so that plunger 12 telescopically fits throughout the interior of barrel 14.
  • plunger 12 has a diameter about 4 mm to about 18 mm. More preferably, plunger 12 has a diameter about 5 mm to about 9 mm with the most preferred diameter being about 7 mm.
  • Plunger 12 has a first flare 32 at its distal end and a second flare or retaining structure 48 at its opposite barrel end 52.
  • Finger grip section 16 has a plunger receiving end 30.
  • Plunger receiving end 30 of finger grip section 16 has a chamfer 44 to receive first flare 32 of plunger 12 during pledget expulsion. This permits shortening the length of the section of plunger 12 that protrudes from barrel 14 since all of the protruded length is available for the telescopic action. This in turns results in a more ergonomic applicator. Such an ergonomic applicator is conducive to one handed use, since the distance between finger grip section 16 and first flare 32, where the fingertip is placed, is reduced by an amount equal to the length of first flare 32. Second flare or retaining feature 48 on barrel end 52 of plunger 12 prevents separation from barrel 14.
  • First flare 32 has a maximum diameter about 6 mm to about 22 mm.
  • the maximum diameter is about 12 mm to about 16 mm, with about 13 mm being the most preferred maximum diameter, in order to provide a secure area for a user's fingertip during pledget expulsion.
  • the rearward end of first flare 32 may be flat, concave, or convex. Preferably, it is concave to provide a secure area for the fingertip.
  • Second flare 48 has a maximum diameter about 5 mm to about 20 mm.
  • the maximum diameter is about 11 mm to about 14 mm, with about 13 mm being the most preferred maximum diameter, in order to prevent separation from barrel 14.
  • the cross-sectional shape of plunger 12 and barrel 14 is circular, due to the use of the term 'diameter', it should be understood that the cross-sectional shape can be non-circular, such as oval or polygonal. Furthermore, the cross-sectional shape can vary along the length of both plunger 12 and barrel 14. For example, a circular plunger with a polygonal finger grip and an oval main body may be formed.
  • the pledget housed by applicator barrel 14 preferably has a tapered forward end that corresponds to that of insertion tip 22.
  • the matching taper supports petals 40 during insertion of applicator 10 so that the petals cannot flex out of shape, thus enhancing comfort. Additionally, during expulsion from applicator 10, the pledget's tapered tip will gradually part the vaginal channel, further enhancing user comfort.
  • Suitable materials for forming plunger 12 and/or barrel 14 include, for example, biopolymer, cardboard, heat shrink plastic, paper slurry, plastic, plastic tubing, pulp slurry, pulp-molded paper, or any combinations thereof.
  • Suitable coating materials include, for example, cellophane, cellulose, epoxy, lacquer, nitrocellulose, nylon, plastic, polyester, polylactide, polyolefin, polyvinyl alcohol, polyvinyl chloride, silicone, wax, or any combinations thereof.

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  • 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

The present invention is directed to an ergonomically improved tampon applicator having a plunger (12) and a barrel (14). The barrel has four distinct sections, namely a finger grip section (16), a reverse taper section (18), a main body section (20), and an insertion tip section (22). The reverse taper section is tapered towards the finger grip section and the main body section is tapered in an opposite direction towards the insertion tip section. A maximum diameter is formed where the reverse taper section and main body section meet on the barrel. The maximum diameter provides a sensory means to the user to alert the user when the applicator has been inserted at the proper depth in the vagina.

Description

ERGONOMIC TAMPON APPLICATOR
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates generally to an improved tampon or tampon applicator. More particularly, the present invention relates to a tampon applicator with a barrel that has a reverse taper section for improved ease of use and user comfort.
2. Description of the Prior Art
Commercial tampon applicators typically consist of a barrel and a plunger used to expel an absorbent pledget housed in the barrel. The barrel is typically sub-divided into three sections, namely a finger grip, an insertion tip, and a main body section, which is located between the finger grip and insertion tip sections.
The finger grip section is typically the same diameter as the main body section of the barrel, but some designs (e.g., Playtex® Gentle Glide®) have a reduced diameter grip for improve grippability. The main body section is typically linear, except on plastic molded barrels where there is a slight taper to improve release characteristics from the manufacturing mold. The insertion tip section on some types of barrels have "petals" which curve over and enclose the pledget (i.e., rounded tip) housed in the barrel, but readily flex outwardly as the pledget is expelled through the insertion tip.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a tampon applicator that is ergonomic.
It is another object of the present invention to provide such an ergonomic tampon applicator with a plunger and a barrel. It is still another object of the present invention to provide such an ergonomic tampon applicator barrel having a finger grip section, a reverse taper section, a main body section and an insertion tip section.
It is yet another object of the present invention to provide such an ergonomic tampon applicator barrel reverse taper section where the reverse taper is towards the finger grip section.
It is a further object of the present invention to provide such an ergonomic tampon applicator barrel finger grip section having a finger accepting region. It is still a further object of the present invention to provide such an ergonomic tampon applicator insertion tip section formed with a plurality of petals.
It is yet a further object of the present invention to provide such an ergonomic tampon applicator main body section with a maximum diameter section that is sensually perceivable to a user to alert the user to the proper insertion depth of the applicator.
It is another object of the present invention to provide such an ergonomic tampon applicator having a plunger with at least one flared end.
These and other objects and advantages of the present invention will be appreciated from an ergonomically improved tampon applicator having a plunger and a barrel, of the present invention. The barrel has four distinct sections, namely a finger grip section, a reverse taper section, a main body section, and an insertion tip section. The reverse taper section is tapered towards the fingergrip section, and the main body section is tapered in an opposite direction towards the insertion tip section. A maximum diameter is formed where the reverse taper section and main body section meet on the barrel. The maximum diameter provides a sensory indicator to the user to alert the user when the applicator has been inserted to the proper depth in the vagina.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a plan view of a tampon applicator of the present invention; Fig. 2 is a cut away view of the tampon applicator of Fig. 1 depicting an absorbent pledget housed in the barrel; and
Fig. 3 is a cut away view of the tampon applicator of Fig. 2 after the pledget has been expelled from the barrel.
DETAILED DESCRIPTION OF THE INVENTION
Referring to drawings and, in particular, Fig. 1 , there is shown an ergonomically improved tampon applicator according to the present invention generally represented by reference numeral 10. The ergonomically improved applicator 10 is easier to use and more comfortable to insert and remove. Applicator 10 includes a plunger 12 and a barrel 14.
Barrel 14 may be divided into four sections, as opposed to three sections typically found in prior art tampon applicators. The four sections include a finger grip section 16, a reverse taper section 18, a main body section 20, and an insertion tip section 22.
Finger grip section 16 is bound by a forward edge ridge 24 and a rearward edge ridge 26. Forward edge ridge 24 provides a firm grip surface during insertion of applicator 10 into the vaginal vault. Rearward edge ridge 26 provides a firm grip surface during expulsion of the pledget (not shown) and during removal of applicator 10 from the body. Forward and rearward edge ridges 24, 26 are about 6 mm to about 22 mm in diameter. Preferably, the forward and rearward edges 24, 26 are about 11 mm to about 17 mm in diameter, with about 14 mm being the most preferred diameter.
A finger accepting region 28 is formed between forward edge ridge 24 and rearward edge ridge 26. To ensure an adequate area to accept a user's finger or fingers, forward edge ridge 24 and rearward edge ridge 26 are spaced about 13 mm to about 40 mm apart. More preferably, forward edge ridge 24 and rearward edge ridge 26 are spaced about 17 mm to about 21 mm apart, with about 19 mm being the most preferred spacing. Finger accepting region 28 may be concave, convex, flat, or any combinations thereof. Preferably, region 28 is concave, which conforms to the contour of a user's finger. The maximum diameter of region 28 is preferably slightly less than the diameter of edge ridges 24, 26. Preferably, region 28 has a maximum to minimum diameter ratio of about 1.10 to about 1.75, with a more preferred ratio of about 1.25 to about 1.35. Finger accepting region 28 may also include one or more gripping structures 46 to improve grippability of applicator 10. Suitable gripping structures 46 include, for example, one or more and preferably two or more, embossments, protuberances, slits, grooves, louvers, perforations, lances, abrasive medias, high wet coefficient of friction materials, pressure sensitive adhesives, or any combinations thereof. In addition, gripping structures 46 may be formed in any shape, including, for example, arc, circle, concave, cone, convex, diamond, line, oval, polygon, rectangle, rib, square, triangle, or any combinations thereof.
The maximum diameter 34 of applicator barrel 14 occurs at the forward end of reverse taper section 18. Reverse taper is meant to include a taper in the reverse direction, i.e. in a direction away from the insertion end of applicator 10, but not necessarily the same dimensional taper as main body section 20. The diameter of reverse taper section 18 tapers down toward forward edge ridge 24, where the diameter is equal to or slightly less than the diameter of forward edge ridge 24. This taper may be linear or curvilinear.
Maximum diameter 34 of barrel 14 exerts a slightly greater pressure than the smaller diameter portions of the barrel on the vaginal opening. This unique feature of barrel 14 provides a sensually perceivable way of signaling or indicating to a user that applicator 10 has been inserted to the correct depth in the vagina. Thus, the location of maximum diameter 34 along the length of barrel 14 is a critical aspect of the present invention. The location of maximum diameter 34 on barrel 14 is about 32 mm to about 54 mm in the axial direction of barrel 14 from forward end 36 of insertion tip 22. Preferably maximum diameter 34 is located about 40 mm to about 50 mm, and more preferably about 44 mm in the axial direction of barrel 14 from forward end 36j of insertion tip 22. Main body section 20 is joined to reverse taper section 18 where maximum diameter 34 of barrel 14 is located. Main body section 20 tapers toward insertion tip section 22 in either a linear or curvilinear fashion so that its smallest diameter occurs where main body section 20 meets insertion tip section 22. The ratio of maximum diameter 34 to the diameter at the forward end 38 of main body section 20 is about 1.1 to about 1.5, and more preferably about 1.2 to about 1.3. This tapering of main body section 20 facilitates insertion comfort by gradually parting the vulva-vaginal channel over a longer length than that of only insertion tip section 22. Insertion tip section 22 begins where there is a substantial change in the curvature of the forward portion of the barrel that is where the pledget- enclosing petals 40 are formed. In applicator designs where no petals are used, insertion tip 22 is the forward edge of the main body section 20 of barrel 14. The preferred insertion tip 22 is the petal type with a curvature that approximates an elliptical or hyperbolic curve. Preferably, insertion tip 22 has about 2 to about 12 petals, and more preferably about 3 to about 8 petals. The ratio of the maximum diameter of insertion tip section 22, which occurs at the plane where its rearward edge meets forward end 38 of main body section 20, to the total axial length of the insertion tip section along a horizontal axis of applicator 10, is about 0.9 to about 1.8, and more preferably about 1.1 to about 1.3.
The less severe curvature of insertion tip section 22 also facilitates insertion comfort by gradually parting the vulva-vaginal channel along its longer length. It should be understood that while tampon applicator barrel 14 of the present invention is depicted as having four sections, namely a finger grip section, a reverse taper section, a main body section, and an insertion tip section, the tampon applicator barrel can include a reverse taper section and at least one additional section selected from a finger grip section, a main body section, an insertion tip section, or any combinations thereof. The interior wall of barrel 14 that houses the pledget may have the same basic sidewall shape as its exterior wall. However, molding such a complicated interior wall requires a complex manufacturing process. Alternately, the interior wall can be practically straight walled (a slight taper may be required for tooling release) while the exterior wall has the sectional shapes discussed before, thus simplifying the molding process.
Referring to Figs. 2 and 3, barrel 14 has a finger grip end 42. Plunger 12 telescopically fits into the finger grip end 42 of barrel 14. Plunger 12 has a diameter slightly smaller than the smallest diameter of finger receiving region 28 so that plunger 12 telescopically fits throughout the interior of barrel 14. Preferably, in one embodiment of the present invention, plunger 12 has a diameter about 4 mm to about 18 mm. More preferably, plunger 12 has a diameter about 5 mm to about 9 mm with the most preferred diameter being about 7 mm.
Plunger 12 has a first flare 32 at its distal end and a second flare or retaining structure 48 at its opposite barrel end 52. Finger grip section 16 has a plunger receiving end 30. Plunger receiving end 30 of finger grip section 16 has a chamfer 44 to receive first flare 32 of plunger 12 during pledget expulsion. This permits shortening the length of the section of plunger 12 that protrudes from barrel 14 since all of the protruded length is available for the telescopic action. This in turns results in a more ergonomic applicator. Such an ergonomic applicator is conducive to one handed use, since the distance between finger grip section 16 and first flare 32, where the fingertip is placed, is reduced by an amount equal to the length of first flare 32. Second flare or retaining feature 48 on barrel end 52 of plunger 12 prevents separation from barrel 14.
First flare 32 has a maximum diameter about 6 mm to about 22 mm. Preferably the maximum diameter is about 12 mm to about 16 mm, with about 13 mm being the most preferred maximum diameter, in order to provide a secure area for a user's fingertip during pledget expulsion. The rearward end of first flare 32 may be flat, concave, or convex. Preferably, it is concave to provide a secure area for the fingertip. Second flare 48 has a maximum diameter about 5 mm to about 20 mm. Preferably the maximum diameter is about 11 mm to about 14 mm, with about 13 mm being the most preferred maximum diameter, in order to prevent separation from barrel 14. Although it might be implied that the cross-sectional shape of plunger 12 and barrel 14 is circular, due to the use of the term 'diameter', it should be understood that the cross-sectional shape can be non-circular, such as oval or polygonal. Furthermore, the cross-sectional shape can vary along the length of both plunger 12 and barrel 14. For example, a circular plunger with a polygonal finger grip and an oval main body may be formed.
The pledget housed by applicator barrel 14 preferably has a tapered forward end that corresponds to that of insertion tip 22. The matching taper supports petals 40 during insertion of applicator 10 so that the petals cannot flex out of shape, thus enhancing comfort. Additionally, during expulsion from applicator 10, the pledget's tapered tip will gradually part the vaginal channel, further enhancing user comfort.
Suitable materials for forming plunger 12 and/or barrel 14 include, for example, biopolymer, cardboard, heat shrink plastic, paper slurry, plastic, plastic tubing, pulp slurry, pulp-molded paper, or any combinations thereof.
To reduce friction and/or increase strength, plunger 12 and/or barrel
14 may be coated with a coating material. Suitable coating materials include, for example, cellophane, cellulose, epoxy, lacquer, nitrocellulose, nylon, plastic, polyester, polylactide, polyolefin, polyvinyl alcohol, polyvinyl chloride, silicone, wax, or any combinations thereof.
The foregoing specification and drawings are merely illustrative of the present invention and are not intended to limit the invention to the disclosed embodiments. Variations and changes, which are obvious to one skilled in the art, are intended to be within the scope and nature of the present invention, which is defined in the appended claims.

Claims

WHAT IS CLAIMED IS:
1. A tampon applicator comprising: a plunger having a first end and a second end; and a barrel having an insertion end and a plunger receiving end, said barrel having a finger grip section on the plunger receiving end and a reverse taper section adjacent the finger grip section in the direction of the insertion end of the barrel.
2. The tampon applicator of claim 1 , wherein said reverse taper section has a taper towards said finger grip section of said barrel.
3. The tampon applicator of claim 2, wherein said taper is selected from the group consisting of linear, curvilinear, and any combination thereof.
4. The tampon applicator of claim 1 , wherein said finger grip section comprises a forward edge ridge and a rearward edge ridge opposite said forward edge ridge.
5. The tampon applicator of claim 4, wherein said forward edge ridge and said rearward edge ridge each have a diameter about 6 mm to about 22 mm.
6. The tampon applicator of claim 4, wherein said forward edge ridge and said rearward edge ridge are spaced apart about 13 mm to about
40 mm.
7. The tampon applicator of claim 4, wherein said finger grip section further comprises a finger accepting region formed between said forward edge ridge and said rearward edge ridge.
8. The tampon applicator of claim 7, wherein said finger accepting region has a diameter less than the diameter of said forward edge ridge and said rearward edge ridge.
9. The tampon applicator of claim 7, wherein said finger accepting region has a surface contour selected from the group consisting of concave, convex, flat, and any combinations thereof.
10. The tampon applicator of claim 7, wherein said finger accepting region has a maximum diameter to a minimum diameter ratio about 1.10 to about 1.75.
11. The tampon applicator of claim 10, wherein said ratio is about 1.25 to about 1.35.
12. The tampon applicator of claim 7, wherein said finger accepting region further comprises one or more gripping structures.
13. The tampon applicator of claim 12, wherein said one or more gripping structures are selected from the group consisting of embossments, protuberances, slits, grooves, louvers, perforations, lances, abrasive media, high wet coefficient of friction material, pressure sensitive adhesive, and any combinations thereof.
14. The tampon applicator of claim 12, wherein said one or more gripping structures are formed in a shape selected from the group consisting of arc, circle, concave, cone, convex, diamond, line, oval, polygon, rectangle, rib, square, triangle, and any combinations thereof.
15. The tampon applicator of claim 1 , wherein said finger grip section further comprises a chamfer at said plunger receiving end.
16. The tampon applicator of claim 15, wherein said chamfer receives said plunger.
17. The tampon applicator of claim 1 , wherein said barrel further comprises a main body section adjacent said reverse taper section.
18. The tampon applicator of claim 17, wherein said main body section has a taper towards said insertion end of said barrel.
19. The tampon applicator of claim 18, wherein said taper is selected from the group consisting of linear, curvilinear, and any combination thereof.
20. The tampon applicator of claim 17, wherein said barrel has a maximum diameter region formed where said main body section abuts said reverse taper section.
21. The tampon applicator of claim 20, wherein said maximum diameter is located on said barrel about 32 mm to about 54 mm from said insertion end of said barrel.
22. The tampon applicator of claim 1 , wherein said barrel has an insertion tip section proximate said insertion end of said barrel.
23. The tampon applicator of claim 22, wherein said insertion tip section has two or more petals.
24. The tampon applicator of claim 22, wherein said insertion tip section has about 3 to about 8 petals.
25. The tampon applicator of claim 22, wherein said insertion tip section has a ratio of a maximum diameter of said insertion tip section to a total length of said insertion tip section about 0.9 to about 1.8.
26. The tampon applicator of claim 23, wherein said ratio is about 1.1 to about 1.3.
27. The tampon applicator of claim 1 , wherein said plunger has a flared end on said forward end, on said rearward end, or both on said forward end and said rearward end.
28. The tampon applicator of claim 15, wherein said plunger has a flared end on said forward end, on said rearward end, or both on said forward end and said rearward end.
29. The tampon applicator of claim 27, wherein said flared end on said forward end has a diameter about 6 mm to about 22 mm.
30. The tampon applicator of claim 27, wherein said flared end on said rearward end has a diameter about 5 mm to 20 mm.
31. The tampon applicator of claim 27, wherein said flared end on said rearward end has a fingertip accepting area.
32. The tampon applicator of claim 31 , wherein said fingertip accepting area has a geometry selected from the group consisting of flat, concave, convex, and any combinations thereof.
33. The tampon applicator of claim 1 , wherein said plunger has a diameter about 4 mm to about 18 mm.
34. The tampon applicator of claim 1 , wherein said barrel, said plunger, or both said barrel and said plunger are formed from a material selected from the group consisting of biopolymer, cardboard, heat shrink plastic, paper slurry, plastic, plastic tubing, pulp slurry, pulp-molded paper, and any combinations thereof.
35. The tampon applicator of claim 1 , wherein said barrel, said plunger, or both said barrel and said plunger, have a surface that is coated with a material selected from the group consisting of cellophane, cellulose, epoxy, lacquer, nitrocellulose, nylon, plastic, polyester, polylactide, polyolefin, polyvinyl alcohol, polyvinyl chloride, silicone, wax, and any combinations thereof.
36. The tampon applicator of claim 35, wherein said surface is an outside surface, an inner surface, and any combinations thereof.
37. A tampon applicator comprising: a plunger; and a barrel having a reverse taper section, said barrel having at least one additional section selected from the group consisting of a finger grip section, a main body section, an insertion tip section, and any combinations thereof.
38. The tampon applicator of claim 37, wherein said main body section has a maximum diameter section that is sensually perceivable to a user.
39. A tampon applicator comprising: a plunger; and a barrel, said barrel having a reverse taper section, a main body section and an insertion tip section, said main body section having a first taper and said reverse taper section having a second taper, wherein said first taper is more gradual than said second taper, and said second taper is in a reverse direction of said first taper.
40. A tampon applicator comprising:
a plunger having either a flared forward end, a flared rearward end, or both a flared forward end and a flared rearward end; and
a barrel having an insertion end and a plunger receiving end, said barrel having a finger grip section on the plunger receiving end, wherein the finger grip section has a chamfer at the plunger receiving end.
41. The tampon applicator of claim 40, wherein said chamfer receives said plunger.
PCT/US2003/028181 2002-09-12 2003-09-10 Ergonomic tampon applicator WO2004024193A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA2498508A CA2498508C (en) 2002-09-12 2003-09-10 Ergonomic tampon applicator
EP03754471.5A EP1545418B1 (en) 2002-09-12 2003-09-10 Ergonomic tampon applicator
JP2004536364A JP4409434B2 (en) 2002-09-12 2003-09-10 Ergonomic tampon applicator
MXPA05002767A MXPA05002767A (en) 2002-09-12 2003-09-10 Ergonomic tampon applicator.
AU2003272295A AU2003272295A1 (en) 2002-09-12 2003-09-10 Ergonomic tampon applicator
MX2015000079A MX370997B (en) 2002-09-12 2003-09-10 Ergonomic tampon applicator.

Applications Claiming Priority (2)

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US10/242,474 US7727208B2 (en) 2002-09-12 2002-09-12 Ergonomic tampon applicator
US10/242,474 2002-09-12

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WO2004024193A2 true WO2004024193A2 (en) 2004-03-25
WO2004024193A3 WO2004024193A3 (en) 2004-07-15

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US (6) US7727208B2 (en)
EP (1) EP1545418B1 (en)
JP (2) JP4409434B2 (en)
AU (1) AU2003272295A1 (en)
CA (1) CA2498508C (en)
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US20150105711A1 (en) 2015-04-16
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US10695230B2 (en) 2020-06-30
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US20130066254A1 (en) 2013-03-14
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US20160296381A1 (en) 2016-10-13
US8337478B2 (en) 2012-12-25
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US9737443B2 (en) 2017-08-22
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US7727208B2 (en) 2010-06-01
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