Foot cover and blank therefor
This invention relates generally to a foot cover and blank therefor and more particularly to a &#34;low cut&#34; type of foot cover in which the upper portion extends to a position below the ankle with the upper edge being substantially contiguous with the upper edge of the shoe. 
     Various types of low cut or within-the-shoe foot covers have been formed of one-piece blanks. For example, Luchs U.S. Pat. No. 2,628,438 discloses this type of foot cover formed with a first pair of seams positioned adjacent opposite sides of the heel and a second pair of seams positioned adjacent opposite sides of the toe. Luchs U.S. Pat. No. 2,724,195 discloses this type of foot cover with a first pair of seams extending along opposite sides of the sole and with a second pair of seams extending upwardly from the sole seams and at opposite sides of the sock. Abel U.S. Pat. No. 3,289,328 discloses this type of foot cover with a long seam extending beneath the toes, along one side of the sole and beneath the heel with a short seam extending upwardly and at one side of the foot cover. While the foot covers disclosed in these patents are formed of one-piece blanks, the positions of certain of the seams can cause discomfort to the wearer. 
     Accordingly, it is an object of the present invention to provide an improved foot cover formed of a one-piece blank and in which the seams are positioned so that they will not cause discomfort to the wearer. 
     In accordance with the present invention, the foot cover is formed of a substantially Y-shaped one-piece blank of stretchable material with the main stem of the Y-shaped blank providing an elongate sole portion including heel and toe ends and with the outwardly extending branches of the blank providing the upper portion of the foot cover. A relatively long seam extends continuously around the sole portion from one side to the other of the toe end and connects the upper portion thereto. A relatively short seam connects opposite ends of the upper portion and extends upwardly in the middle of the heel and from the sole seam to the foot receiving opening. The foot cover blank is preferably cut from stretchable knit fabric which may be of a light-weight sheer construction so that the foot cover may be worn with dress shoes or the knit fabric may be of a heavier construction and may include terry loops so that the foot cover can be worn as a sport sock inside of tennis shoes or the like. The foot receiving opening defining the upper edge of the foot cover is provided with an overedge seam and an elastic tape or band is attached to the foot receiving opening by the overedge seam. 
    
    
     Other objects and advantages will appear as the description proceeds when taken in connection with the accompanying drawings, in which 
     FIG. 1 is a plan view of the one-piece blank used in forming the foot cover in accordance with the present invention; 
     FIG. 2 is an isometric view looking downwardly at the upper portion of the foot cover; 
     FIG. 3 is an isometric view looking upwardly at the sole portion of the foot cover, the foot cover being turned inside out; 
     FIG. 4 is a perspective view looking at the bottom of the foot cover and illustrating its appearance when placed on the foot; 
     FIG. 5 is a perspective view of the foot cover, looking from the rear and illustrating its appearance when worn on the foot; and 
     FIG. 6 is an isometric fragmentary sectional view taken substantially along the line 6--6 in FIG. 2 and illustrating the manner in which the elastic tape or band is attached to the foot receiving opening by the overedge seam. 
    
    
     As illustrated in FIG. 1, the substantially Y-shaped one-piece blank for forming the stretchable foot cover includes a main stem defining an elongate sole portion, broadly indicated at 10. The sole portion 10 includes a curved heel end 11 and a toe end, indicated by the dotted fold line 12. Opposite sides 13, 14 of the sole portion 10 are equally spaced from and extend generally parallel to the longitudinal center line, indicated by dash-dot line 15, of the sole portion 10 and the opposite sides 13, 14 are slightly curved outwardly. 
     The outwardly and upwardly extending branches of the Y-shaped blank provide a pair of wing portions 16, 16a, each defining toe, side and heel portions integral at their inner ends with the toe end of the sole portion 10 and integral with each other along the extension of the longitudinal axis 15 of the sole portion 10. The wing portion 16 includes generally parallel outwardly curved first and second or lower and upper sides 17, 18 and an outer free end 19. The wing portion 16a also includes generally parallel outwardly curved first and second or lower and upper sides 20, 21 and an outer free end 22. 
     The dimensions of the substantially Y-shaped blank shown in FIG. 1 will vary in accordance with the size of the foot cover desired and the type of stretchable textile fabric from which the blank is cut. It is preferred that the first or lower sides 17, 20 of the respective wing portions 16, 16a be of substantially the same length as the sum of the length of one of the corresponding sides 13, 14 and one-half of the length of the heel end 11 of the sole portion 10. For example, when the knit fabric is constructed of relatively fine denier or sheer yarn which has a highly stretchable characteristic, it will be necessary to form only one or two sizes to fit the full range of foot sizes. On the other hand, when the knit fabric is constructed of relatively heavyweight yarn having a relatively low degree of stretch, either with or without terry loops, it may be necessary to form more than two sizes of blanks so that the foot cover will fit the full range of foot sizes. 
     To form the foot cover from the blank shown in FIG. 1, the toe portion is folded along the dotted line 12 and first seam means, indicated by the seam 24, is continuously formed completely around the sole portion 10 and from one side to the other of the toe end to connect the first or inner sides 17, 20 of the wing portions 16, 16a to the sole portion 10. Second seam means, indicated by seam 25, connects the adjacent outer ends 19, 22 of the side and heel portions 16, 16a and extends upwardly from the seam 24 to the foot receiving opening defined by the second sides 18, 21 of the side and heel portions 16, 16a. Overedge seam means, indicated as an overedge seam 30 (FIG. 6), is formed around the foot receiving opening and an elastic tape or band 31 is attached to the inner surface of the foot receiving opening by the overedge seam 30. 
     The order in which the seams 24, 25 and 30 are formed is not critical. However, it has been found desirable to first form the overedge seam 30 while attaching the elastic tape or band 31 to the foot receiving opening. The outer ends 19, 22 are then connected together by forming the seam 25, and then the upper portion of the foot cover is connected to the sole 10 by forming the seam 24, starting at one side of the toe end of the sole portion 10 and sewing continuously and completely around the sole portion. 
     The foot cover of the present invention thus includes first seam means, seam 24, extending around the sole of the foot of the wearer where the pressure between the shoe and the foot is at a minimum and second seam means, seam 25, connecting adjacent ends 19, 22 of the side and heel portions 16, 16a and extending a relatively short distance upwardly from the seam 24 and to the foot receiving opening at the middle of the heel. It will be noted that there are no seams extending across the ends of the toes or above or beneath the toes and no seams extending vertically on either side of the foot cover so that the foot cover can be worn on either foot. 
     In the drawings and specification there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being defined in the claims.