Patent Publication Number: US-6041446-A

Title: Panty with integrated treated crotch

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention is directed to a panty and, more particularly, to a panty having a seamless construction and a crotch formed with a pretreated antimicrobial yarn for killing and inhibiting the growth of yeast and bacteria. 
     2. Description of the Prior Art 
     It has been known to provide panties with a crotch that has been treated to control various concerns. For example, U.S. Pat. No 4,244,059, discloses a panty crotch that comprises a fabric makeup that is designed to absorb odorous molecules from the crotch region. In particular, the crotch panel of this disclosure features a soft fabric that has a substantial air permeability with an alkali metal carbonate compound that causes the panty crotch to essentially absorb certain odors in and around the crotch region. 
     U.S. Pat No. 4,731,063 discloses a disposable insert device that can be placed within an undergarment in the crotch region that is effective to inhibit bacterial growth and which is claimed to suppress and reduce undesirable body odors in the crotch and genital area. 
     U.S. Pat. No. 5,152,014 discloses a liner for a woman&#39;s body undergarment that is formed of a hydrophobic fiber having an irregular outer surface which &#34;wicks&#34; moisture away from the body. This patent appreciates that by reducing the moisture content in the crotch region of a woman&#39;s panty that such may help reduce the generation of yeast infections. 
     It is further appreciated that yeast infections among women are both common and certainly aggravating and discomforting. Presently, there is little that a woman can actually do to prevent yeast infections before they occur. Usually, yeast infections are treated only after they are present and the unpleasant accompanying symptoms have become manifested. 
     There is and continues to be a need to treat or more particularly to kill and inhibit the growth of yeast and bacteria before the microorganisms have an opportunity to give rise to an infection. 
     SUMMARY OF THE INVENTION 
     The present invention is directed to a panty having a front panel, a back panel, and a crotch section positioned between the front and back panels. The front and back panels are constructed from at least a first yarn type, as the crotch section is constructed from the first yarn type and an integrated second yarn type that is pretreated with a chlorinated phenoxy antimicrobial composition to kill and inhibit the growth of bacteria and yeast. The panty is formed in an operation that seamlessly integrates the front panel, crotch section, and back panel providing for easier manufacturing and a more comfortable fit. 
     A method of manufacturing the panty includes knitting the front panel with a first knit construction and using a first yarn type. The crotch section is seamlessly positioned adjacent to the front panel and includes at least both the first yarn type and a second antimicrobial yarn. Preferably, the crotch section has a different knit construction than the front panel. The back panel is seamlessly added to the crotch section by removing the antimicrobial yarn and changing the knit construction to that of the front panel. The sides of the front and back panels are connected together forming the panty 
     A second method of making the panty includes knitting the various sections of the panty seamless together to form a tube-like garment. Leg openings are cut from one end of the tube and the opening is seamed together forming the panty. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective view of panty constructed according to the present invention; 
     FIG. 2A is a perspective view of a panty knitted by a circular knitting machine or hosiery machine; 
     FIG. 2B illustrates the panty of FIG. 2A after being slit lengthwise; 
     FIG. 2C is a perspective view illustrating the completed panty constructed according to one embodiment of the present invention; 
     FIG. 3A illustrates a panty knitted in a tube within a seamless panty machine; 
     FIG. 3B is a perspective view of the completed panty of FIG. 3A constructed according to the present invention; and 
     FIG. 4 is a schematic view of the feeds and yarns being inserted into the garment during the manufacturing process. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The present invention is directed to a panty, generally indicated by numeral 10 in FIG. 1, having a front panel 12 and back panel 16. A crotch section 14 is positioned between the panels and includes yarns that have been pretreated with an antimicrobial composition to kill and inhibit the growth of bacteria and yeast that give rise to infections within women. Transitional areas 25, 26 may be positioned between the panels and crotch section for improving the comfort and feel of the panty to a user. 
     The front panel 12 and back panel 16 are constructed of a first yarn type and preferably formed of a knit construction. In one embodiment, the panels are formed of at least two nylon yarns. Other types of yarns including cotton yarns and a stretch yarn, such as LYCRA®, may be used for constructing the panels and additional yarns may be inserted depending upon the desired appearance, feel, texture, and knit construction. Additionally, the front panel may have a different knit construction than the back panel, and may be constructed of different yarn types. 
     The crotch section 14 is positioned between front panel 12 and back panel 16. Crotch section 14 includes the first yarn type used in the front and back panels and at least a second yarn type that is pretreated with an antimicrobial composition. The crotch section 14 may be formed of any number of individual yarns from the first and second yarn types. In addition, other yarn types may be inserted for aesthetic and/or comfort purposes. In one embodiment, the crotch section 14 is constructed of at least two nylon yarns and one acetate yarn that has been pretreated with an antimicrobial composition. 
     In a preferred embodiment, the antimicrobial composition is a chlorinated phenoxy antimicrobial composition and the pretreated yarn is an acetate yarn subjected to the antimicrobial composition prior to being fabricated into the crotch section 14. For acetate treated yarn, the chlorinated phenoxy antimicrobial composition is acetone soluble and is introduced into cellulose acetate dope from an acetone solution. 
     The crotch section 14 is preferably of a different knit construction than the front and back panels such as a loop structure of a mock terry knit for providing more contact surfaces between the user and the crotch section. The construction of the crotch section is also effective to control the moisture by either transporting away or absorbing the moisture to further prevent bacteria and infections. 
     A front transitional area 25 and back transitional area 26 may be positional between the panels and crotch section 14 as illustrated in FIG. 1. The transitional areas taper down between the user&#39;s legs to further increase comfort and fit of the panty. Preferably, the transitional areas are constructed of the same yarns used within the front panel 12 and back panel 16. However, a different knit construction may be used for the transitional areas than in the panels 12, 16 or crotch section 14. 
     A band 20 may extend around the upper edge of the front and back panels for holding the panty on the user. Several different embodiments of the band 20 are contemplated in the present invention and may include a band constructed of a different yarn type, such as elastic knit within the panels, or the same knit construction as the panels and folded for a two-ply construction. Additionally, a border 22 may be placed around leg openings 24 to provide for a more comfortable fit. 
     The panty may be constructed in a variety of methods. One method illustrated in FIGS. 2A-2C uses a circular knitting or hosiery machine commonly known in the art. These types of machines provide for a variety of feeds to feed yarn into the knitting elements and may be programmed to feed yarns into the knitting elements at different stages while producing the garment. In one embodiment, there are four feeds that lead into the machine. FIG. 4 illustrates a schematic representation of four feeds 50, 60, 70, 80, feeding yarn into the garment 10. In one embodiment, nylon yarn is introduced through feeds 50 and 60, an acetone yarn pretreated with the antimicrobial composition is introduced through feed 70, and polyester yarn is introduced through feed 80. As illustrated in FIG. 2A, the panty is constructed by feeding the nylon yarns of feeds 50 and 60 to initially knit the back panel 16. At the completion of the back panel 16, the machine is programmed to continue feeding nylon yarns 50 and 60 and seamlessly changing the knit construction to form transitional area 26. At the completion of the transitional area 26, the machine is programmed to seamlessly change the knit construction and also introduce the antimicrobial yarn through feed 70 and the polyester yarn through feed 80 to form the crotch section 14. This order is then reversed to form the remainder of the garment by seamlessly removing feeds 80 and 70 and changing the knit construction to form transitional area 24, and seamlessly changing the knit construction to form front panel 12. The garment is removed from the machine at completion of formation resulting in a tube structure as illustrated in FIG. 2A. In an alternative embodiment, a stretch yarn may be inserted in place of the polyester yarn. 
     The tube is slit lengthwise and laid open as illustrated in FIG. 2B. Edges of the front panel represented by Z and X are then sewn together with edges of the back panel 16 illustrated by Y and W along seams 13 to form the panty as illustrated in FIG. 2C. This embodiment provides the length of the panty to be seamless for a more comfortable fit by placing seams 13 along the sides of the panty positioned along the sides of the users legs. 
     FIGS. 3A and 3B illustrate a second method of producing the panty of the present invention through the use of a seamless panty machine. The seamless panty machine produces a tube garment as illustrated in FIG. 3A by introducing yarns and changing knit construction as previously described. The knitted garment once removed from the seamless panty machine is illustrated in FIG. 3A. Leg openings 24 are cut within the panty and sewn together in the crotch section 14 by seam 45 to produce a finished panty as illustrated in FIG. 3B. Alternatively, seam 45 may be positioned between the crotch section 14 and the front panel 12 or crotch section 14 and back panel 16. 
     In the following description, like referenced characters designate like or corresponding parts throughout the several views. Also in the foregoing description, it is to be understood that such terms as &#34;forward&#34;, &#34;rearward&#34;, &#34;left&#34;, &#34;right&#34;, &#34;upwardly&#34;, &#34;downwardly&#34;, and the like are words of convenience and are not to be construed as limiting terms. Certain modifications and improvements will occur to those skilled in the art upon the reading of the foregoing description. It should be understood that all such modifications and improvements have been deleted herein for the sake of conciseness and readability but are property within the scope of the following claims.