Slipper and method for manufacturing slipper

Information

  • Patent Grant
  • 6226894
  • Patent Number
    6,226,894
  • Date Filed
    Monday, May 11, 1998
    26 years ago
  • Date Issued
    Tuesday, May 8, 2001
    23 years ago
Abstract
A slipper and a method of manufacturing a slipper is described where the slipper includes an outsole having a sidewall extending along a perimeter of the outsole. The outsole also includes a supporting sole structure including a platform surface. The supporting sole may include lattice walls defining open cells. The slipper also includes an insole and a vamp. The insole covers the platform of the outsole and fits within the sidewall. The method of manufacture includes the steps of providing the outsole, providing the vamp, and attaching a lower perimeter of the vamp to at least a portion of the sidewall extending along a perimeter of the outsole.
Description




FIELD OF THE INVENTION




This invention pertains to footwear. More particularly, this invention pertains to a slipper having a molded outsole, and to a method for manufacturing a slipper having a molded outsole.




BACKGROUND OF THE INVENTION




The footwear industry is an old and crowded art. The industry is constantly attempting to design new products with aesthetic appeal, as well as being comfortable and having ease of construction.




Various designs of slippers have been available for a number of years. In general, slippers are a type of footwear having a generally soft construction and which are generally washable in a conventional clothes washing machine. Slippers are typically not manufactured using a last, which is often a necessary device when manufacturing a shoe, including a hard sole and a leather upper.




SUMMARY OF THE INVENTION




A slipper having a molded outsole is provided according to the present invention. The outsole includes a sidewall extending along a perimeter of the outsole and includes a supporting sole structure having a platform surface. A heel region, an instep region and a toe region are present in the outsole. The slipper also includes an insole that covers the platform surface of the outsole, within the sidewall extending along a perimeter of the outsole. The slipper further includes a vamp that is stitched to at least a toe region of the sidewall.




The supporting sole structure of the outsole preferably defines open cell areas. The outsole has a thickness across its length, that is thickest in the heel region, defining a wedge shape of the outsole. In one embodiment, the vamp may include a molded polymeric material. In another embodiment, the vamp may be a fabric vamp having two forward projections stitched together and two rearward projections stitched together, and having a perimeter that is sewn to the sidewall extending along the outsole.




A method of manufacture of a slipper is also provided by the present invention. The method includes providing an outsole having a sidewall extending along a perimeter of the outsole and a supporting sole structure including a platform surface. The method also includes providing a vamp and attaching at least a portion of a lower perimeter of the vamp to the sidewall of the outsole. In one embodiment of the method of manufacture of a slipper, a molded polymeric vamp may be attached by inverting the vamp, stitching the lower perimeter of the vamp to the sidewall at the toe and instep regions, and turning the vamp so that the lower perimeter of the vamp is positioned inside the sidewall. In another embodiment of the method, a fabric vamp has a perimeter that is stitched to the sidewall extending along a perimeter of the outsole.











BRIEF DESCRIPTION OF THE DRAWINGS





FIG. 1

is a perspective view of an assembled slipper of the present invention intended to be worn on the left foot, where the right foot construction is substantially a mirror image of

FIG. 1

;





FIG. 2

is a bottom plan view of the outsole of the slipper of

FIG. 1

;





FIG. 3

is a perspective view of the outsole of the slipper of

FIG. 1

;





FIG. 4

is a top plan view of the outsole of the slipper of

FIG. 1

;





FIG. 5

is a sectional elevation view of the outsole of the slipper of

FIG. 1

, taken along line


5





5


in

FIG. 4

;





FIG. 6

is a sectional elevation view of the outsole of the slipper of

FIG. 1

, taken along line


6





6


in

FIG. 4

;





FIG. 7

is a perspective view of the vamp of the slipper of

FIG. 1

;





FIG. 8

is a side elevational view of the vamp and the outsole of the slipper of

FIG. 1

during a first assembly step;





FIG. 9

is a sectional elevation of the vamp and outsole of the slipper of

FIG. 1

during assembly taken along line


9





9


in

FIG. 8

;





FIG. 10

is a side elevational view of the vamp and the outsole of the slipper of

FIG. 1

during assembly;





FIG. 11

is a sectional elevation of the vamp and outsole of the slipper of

FIG. 1

during assembly taken along line


11





11


in

FIG. 10

;





FIG. 12

is a sectional elevation similar to

FIG. 11

after the vamp has been turned during assembly;





FIG. 13

is a left side elevation view of the slipper of

FIG. 1

during assembly;





FIG. 14

is a left side elevation of an alternate embodiment of the slipper of the present invention;





FIG. 15

is left side elevation of an alternate embodiment of the slipper of the present invention;





FIG. 16

is a side view of a foam layer that is included in the insole of the slipper of

FIG. 1

;





FIG. 17

is atop plan view of the foam layer of

FIG. 16

;





FIG. 18

is a side view of a heel filler of the slipper of

FIG. 1

;





FIG. 19

is a top plan view of the heel filler of

FIG. 18

;





FIG. 20

is a top plan view of a partial assembly of the insole of the slipper of

FIG. 1

;





FIG. 21

is a perspective view of a securement strap that is a part of the slipper of

FIG. 1

;





FIG. 22

is a top plan view of a further partial assembly of the insole of the slipper of

FIG. 1

;





FIG. 23

is a perspective view of a further assembly step of the slipper of

FIG. 1

;





FIG. 23A

is a perspective view of an assembly step of the slipper of

FIG. 1

using an alternate securement strap;





FIG. 24

is a perspective view of a fully assembled alternate embodiment of the slipper of the present invention;





FIG. 25

is a bottom plan view of the outsole of the slipper of

FIG. 24

;





FIG. 26

is a top plan view of the outsole of the slipper of

FIG. 24

;





FIG. 27

is a side elevational view of the outsole of the slipper of

FIG. 24

;





FIG. 28

is an exploded view of a pre-assembly position of the insole of the slipper of

FIG. 24

;





FIG. 29

is a perspective view of assembly steps involving the components of

FIG. 28

;





FIG. 30

is a perspective view showing the assembled insole of the slipper of

FIG. 24

;





FIG. 31

is an exploded perspective view of the components of the vamp of the slipper of

FIG. 24

;





FIG. 32

is a perspective view of the vamp during assembly of the slipper of

FIG. 24

;





FIG. 33

is a perspective view of further assembly steps involving the vamp of the slipper of

FIG. 24

;





FIG. 34

is a perspective view of assembly steps involving the vamp and the insole of the slipper of

FIG. 24

;





FIG. 35

is a further assembly view of the components of

FIG. 34

; and





FIG. 36

is a perspective view of the final assembly steps of the slipper of FIG.


24


.











DETAILED DESCRIPTION OF THE VARIOUS EMBODIMENT




Referring now to the several figures in which identical elements are numbered identically throughout, a brief description of the preferred embodiments of the present invention will now be provided. Referring now to

FIG. 1

, a slipper


10


constructed according to the present invention is shown. The slipper


10


has a general clog type appearance. That is, it looks like a clog but does not include the wooden sole normally found in conventional clogs. The slipper


10


can be referred to as the closed toe slipper because the wearer's toe is covered when the slipper is worn. In contrast, alternative designs of the slipper of the invention include an open toe slipper using a fabric upper provided at reference numeral


100


in

FIG. 24

that exposes the wearer's toes when the slipper is worn. Two additional style slippers can be referred to as the molded sandal and the molded open toe slipper and are provided at reference numeral


150


in FIG.


14


and at reference numeral


200


in

FIG. 15

because they may use an upper of a molded polymeric material.




One embodiment of the closed toe slipper


10


is also described in U.S. Design Patent Des. 514,606, titled MOLDED SLIPPER, which is incorporated herein by reference in its entirety. One embodiment of the open toe slipper


100


is described in U.S. Design Patent Des. 418,281, titled OPEN TOE SLIPPER, which is incorporated herein by reference in its entirety.




The slipper


10


includes three general components which can be identified as the outsole


12


, the vamp


14


, and the insole


16


. The outsole


12


provides a flexible and durable structure which resists wear. A combination of the vamp


14


and the insole


16


can be referred to as the upper


17


. It will be appreciated that these various slipper designs can advantageously incorporate an outsole having several features.




Now referring to

FIGS. 2-6

, the outsole


12


is described in detail. The outsole


12


includes an exterior surface


20


, sidewall


24


, and supporting sole structure


26


. The exterior surface


20


includes an outsole side surface


25


and an outsole bottom surface


27


. The outsole bottom surface


27


has a tread pattern


28


. It should be understood that while the tread pattern


28


shown in

FIG. 2

is a preferred tread pattern, the variety of tread patterns available for use in the present invention are numerous, and it is expected that these numerous tread patterns can be used in the slipper of the invention. The sidewall


24


extends about the perimeter


30


of the slipper


10


, meaning that the sidewall


24


may be present at a portion of the outsole perimeter


30


, or at the entire outsole perimeter


30


. One purpose for the sidewall


24


is to help retain the insole


16


within the slipper, framing a platform surface


18


on which the insole


16


rests. In addition, the purpose of the sidewall is to provide a lip which can receive stitching


34


, as shown in

FIG. 10

, for attaching the vamp to the outsole


12


. It should be understood that the minimum height of the sidewall


24


is provided to accommodate the thickness of the insole


16


.




The supporting sole structure


26


is preferably provided with a honeycomb construction composed of the lattice walls


38


and the open cells


40


. In general, this means that the supporting sole


26


provides sufficient structural integrity to support the wearer's weight without being crushed, while providing a reduced amount of material compared with a completely filled supporting sole structure.




The supporting sole structure


26


preferably includes a series of lattice walls


38


and cells or open areas


40


. It is desirable to provide the supporting sole


26


with the desired degree of structural integrity, but at a much lighter weight compared with a supporting sole which is entirely filled, such as a wood supporting sole. In addition, it should be understood that while the honeycomb construction is preferred within the supporting sole


26


, the invention can be practiced with a continuous material within the supporting sole


26


. That is, the supporting sole


26


need not include the cells and open areas


40


.




The outsole


12


includes a heel portion


21


, an instep region


22


, and a toe region


23


. The outsole is preferably designed to provide the silhouette and support of a wedge shape, which is aesthetically desirable and comfortable for the wearer. Currently, many shoes or slippers use a separate foam or wooden wedge inside the outsole to achieve the wedge shape. However, wooden wedges increase the weight of a shoe or slipper. Separate wedge pieces of foam or wood may introduce an additional assembly step into the manufacturing process. A one-piece, molded outsole may therefore preferably be used with the present invention, providing the wedge advantage and simplifying the manufacture process. The outsole of the present invention has a thickness across its length, running from the toe region


23


to the heel region


21


, that is thickest at the heel region


21


. The lattice walls


38


are larger near the heel portion


21


of the outsole, in order to provide the wedge advantage.




The vertical sidewall


24


has a height defined as the distance from the platform surface


18


to the top of the sidewall


24


. The height of the vertical sidewall


24


will be sufficient to provide a lip for stitching to the vamp lower perimeter


41


, as shown in FIG.


11


. In one embodiment of the present invention, the vertical sidewall


24


may have a height of about {fraction (1/16)} inch to 1 inch. More preferably, the sidewall


24


projects about ⅛ inch to ⅜ inch, or most preferably {fraction (5/16)} inch. The outsole is preferably made of a moldable polymeric compound such as thermoplastic rubber, although many other materials are available.




Now referring to

FIG. 7

, the vamp


14


is described in detail. The vamp


14


is designed such that the lower perimeter


41


of the vamp will fit within the contoured perimeter of the sidewall


24


of the molded outsole


12


. The term ‘lower perimeter’refers to the edge of the vamp that contacts the outsole in the assembled slipper of the present invention. The throat dimensions and design taper


42


along the bottom perimeter


41


of the vamp are designed to allow inverted attachment and turning of the upper to the outsole. The design taper


42


is located at the lower perimeter


41


of the vamp, where the vamp material is thinner than the remainder of the vamp. The vamp therefore fits inside the vertical sidewalls


24


. This tapering allows reverse attachment of the upper to the outsole followed by turning of the upper, as will be illustrated. The vamp is preferably made of a moldable compound. The vamp


14


may include molded design elements


47


. Although one embodiment of this product utilizes thermoplastic rubber as the moldable composition, other materials suitable for filling casts or tooled molds can be utilized to create the upper or the outsole.




The insole


16


is illustrated in

FIGS. 16-22

. The insole


16


is a padded structure designed to provide cushioning. The insole


16


includes foam and fabric material, for example, a layer of foam


44


. Notches


43


of the foam layer


44


are used for alignment with other components. A fabric backing layer


53


may be provided on one or both sides of the foam layer


44


, and is preferably present on the side of the foam layer


44


that will contact the wearer's foot as shown in FIG.


1


.




A heel lift


45


is illustrated in

FIGS. 18-19

. The heel lift


45


will be attached to the insole


16


to provide additional heel support and lift for the wearer. Notches


43


assist in aligning the heel lift with the insole


16


.




An insole securing strap


46


is illustrated in FIG.


21


. The insole securement strap


46


may be made of an elastic material in one embodiment of the present invention. The strap


46


may be used to secure the insole


16


to the vertical sidewall


24


at the rear most heel portion


21


of the outsole


12


by stitching. An extended strap


49


may also be used that could be attached at the toe


23


and heel


21


of the outsole


12


as shown in FIG.


23


A. An insole


16


may then be secured to the extended strap


49


by adhesive or stitching. The extended strap


49


may also be made of an elastic material in one embodiment.




Now referring to

FIGS. 8-23

, a method of manufacture of molded slipper


10


will now be illustrated. Assembly may commence with the attachment of the lower perimeter


41


of the vamp


14


to the toe region


23


and instep region


22


of the outsole vertical sidewall


24


. The vamp


14


is not attached to the heel region


21


of the outsole


12


. This attachment is done with the vamp


14


being inverted so that the top surface of the vamp


14


is held in position against the outsole bottom surface


27


of the outsole


12


as shown in cross-section in FIG.


9


. Any molded design elements


47


are therefore facing the outsole bottom surface


27


as illustrated in FIG.


8


. Stitching of the two perimeter surfaces is now performed through the lower perimeter


41


of the vamp and the vertical sidewalls


24


of the outsole. In

FIG. 8

, a portion of the vamp


14


is cutaway to reveal the outsole


12


behind. Stitching


34


as shown in

FIGS. 10 and 11

securely attaches the vamp


14


to the sidewall


24


. In

FIG. 10

, a small portion of the vamp


14


is shown in cross-section near the toe region


23


. Many different stitch types may be used for stitching


34


that secure the vamp


14


to the sidewall


24


. The stitch type shown in the figures is preferred and is considered to provide ornamentation to the slipper


10


.




Features of the vamp


14


make reverse attachment of the vamp


14


to the outsole


12


possible. The taper area


42


along the bottom perimeter


41


of the vamp


14


provides an alignment feature which is critical to an operator who is sewing blindly. This feature provides a means to maintain the depth of the vamp in the outsole, therefore ensuring fit is maintained. If the vamp is positioned and stitched too far down in the outsole, then the overall product will be too snug to the wearer across the top of the foot.




Further, the taper area


42


reduces the thickness of the vamp to match that of the outsole sidewall


24


. The combined thickness of the taper area


42


of the vamp and the sidewall


24


is approximately equivalent to the thickness of the remainder of the vamp. This allows the vamp


14


to be turned and snapped into position behind the vertical sidewall of the outsole in the closed toe product, as illustrated in FIG.


12


and FIG.


13


.

FIG. 12

shows a cross-sectional view of the partially assembled slipper


10


taken near the heel portion


21


of the vamp


14


. As shown in

FIG. 12

, the vertical sidewall


24


of the outsole


12


is outside of the taper portion


42


of the vamp


14


. Stitching


34


secures the vamp


14


to the outsole


12


at the vertical sidewall


24


.

FIG. 13

shows a side view of the slipper


10


after the vamp has been turned. The rearward extremities of the vamp are now stitched horizontally through the vertical sidewall


24


of the outsole a second time, as shown by stitching


50


in FIG.


13


. Stitching


50


provides additional strength at these stress points, to prevent the vamp from tearing away from the outsole


12


during use.




Although attachment of the closed toe vamp


14


requires stitching in an inverted position, attachment of sandal straps


51


or open toe upper


52


may be done directly to and through the inside surface of the vertical sidewall


24


of the outsole


12


for open toe molded slipper


150


and molded sandal


200


in

FIGS. 14 and 15

. As with the closed toe vamp


14


, a sandal strap


51


or an open toe upper


52


is secured to the outsole by means of stitching


54


, through the lower perimeter of the vamp and the vertical sidewall


24


of the outsole. Reinforcing stitching


56


is also used in slippers


110


,


150


. Both the sandal straps


51


and the open toe upper


52


are tapered at the lower perimeter to allow for alignment with the outsole


12


. Stitching of these alternative uppers may be done using a variety of stitch types through the vertical sidewall of the outsole.




Now referring to

FIGS. 16-24

, the insole


16


includes a foam layer


44


covered by a piece of backing fabric


53


. During the binding operation of the insole


16


, a strip of binding fabric


58


is placed to cover the edge of the foam layer


44


, and wrap around the edges of the foam layer


44


. The heel lift


45


is placed near a heel portion


59


of the foam layer


44


, to be sewn to the foam layer


44


with the binding fabric


58


. The strap


46


is placed near the heel end of the insole


16


, also to be stitched into the binding stitch line around the entire perimeter of the insole


16


. Stitching


62


thus binds the fabric


58


to the edge of the foam layer


44


, and secures the heel lift


45


to the strap


46


and to the foam layer


44


. This binding operation of the insole is illustrated in FIG.


22


.




One end of the heel strap


46


is then attached through the vertical sidewall


24


in the heel area by stitching


64


as shown in FIG.


23


. The heel strap


46


thus secures the insole


16


to the outsole, preventing the insole


16


from sliding under a wearer's foot during walking. The attachment of the insole may be provided at only the heel portion, so it is possible to remove water from the outsole framework. If water becomes logged in the recesses


40


of the outsole


12


, the insole


16


may simply be pulled back from the outsole surface, while remaining attached at the heel. The user may empty water from the recesses


40


of the outsole


12


, and then reinsert the insole


16


into the slipper. The fact that the insole


16


is not adhered or sealed to the outsole around its entire perimeter allows further circulation of air throughout the outsole's chambers to allow for evaporation of moisture.




The insole


16


may also be attached by means of an extended securement strap


49


extending from heel to toe on the outsole


12


. This strap


49


may be attached at the heel and toe by stitching through the outsole sidewall


24


as shown in FIG.


23


A. The insole is then secured to this strap by adhesive or stitching. The extended securement strap


49


also allows for the evacuation of water from open cells


40


by the wearer as the insole is not adhered around its perimeter to the outsole. Circulation of air is also encouraged throughout the outsole's chambers because insole


16


is not sealed to the outsole


12


around the entire insole perimeter.




According to these construction steps, a slipper


10


of

FIG. 1

is completed having a molded upper


14


and a molded outsole


12


having lattice walls


38


. The outsole


12


also includes a vertical sidewall


24


as shown in FIG.


23


. The vertical sidewall is heightened to allow for inversely attaching the molded upper


14


to the outsole


12


, and for providing a secure attachment between the upper and the outsole


12


. The sidewall


24


is further intended to provide a framed surface


18


into which an insole


16


is seated and attached. This frame created by the sidewall


24


allows for a foam cushion to be securely placed with a molded outsole product. The molded slipper


10


provides an aesthetically pleasing appearance similar to that of a one piece molded slipper, but allows for light weight construction of the outsole, securement of a foam cushioning insole


16


, and easy drainage of open cells


40


. These advantages result because the slipper


10


is made from a manufacturing process where separate vamp


14


and outsole


12


members are molded, and are then combined with an insole in a sewing process.




Now referring to

FIGS. 24-36

, the slipper


100


includes three general components which can be identified as the outsole


12


, the vamp


102


and the insole


104


. The combination of the vamp


102


and the insole


104


can be referred to as the upper


106


. The slipper


100


possesses a finished edge that is typically achieved by using a separate piece of cloth or leather binding attached around the perimeter of an insole or outsole to which an upper has been attached by means of lasting. The slipper


100


according to the present invention includes an upper that is attached through the vertical sidewall of the outsole. Previous open-toe slippers have frequently had uppers that were attached through the bottom of the outsole so that the stitching was perpendicular to the bottom surface of the product. The slipper


100


therefore provides the advantage of the final appearance of a bound construction without the use of a separate piece of cloth binding.




The outsole


12


of the slipper


100


is identical to the outsole


12


included in slipper


10


. Outsole


12


is illustrated in

FIGS. 2-6

and


25


-


27


. An alternative tread pattern


108


on the exterior surface


20


of the outsole


12


is shown in

FIG. 25

, any many different tread patterns may be used.




Now referring to

FIGS. 28-35

, the upper


106


is described in detail. Components of the upper


106


include a sock


109


, a vamp


102


, a vamp lining


120


, and a sole filler


110


. The sock


109


includes a fabric surface


111


that will contact the wearer's foot as the foot is supported by the interior surface


18


of the outsole


12


. The vamp


102


possesses forward projections


122


and rearward projections


124


which are utilized during the manufacturing process. The vamp lining


120


is designed to be the mirror image of the vamp


102


. The internal perimeter of these projections


122


,


124


will be inseamed to the internal perimeter of the similar projections


126


,


128


on the vamp lining


120


, and then turned inside out to produce a smooth finished top edge. The inseam projections will then be stitched together and to the outsole


12


at the vertical sidewall


22


, as is described further herein.




Now referring to

FIG. 28

, the insole


104


will be described. The insole


104


includes a sock


109


, an insole filler


110


, a heel filler


114


, and a heel pocket


118


. The sole filler


110


is a foam material layer shaped to fit into the outsole


12


, and may include fabric backing on one or more sides. The sole filler


110


and sock


109


include notches


112


on the edges in order to assist in alignment with other components. The heel filler


114


may be a layer of resilient material, such as a denser foam than is used for the sole filler


110


. The heel filler


114


will be attached to the sole filler


110


at a heel portion


116


. A heel pocket


118


is made of a thin fabric material and is slightly larger than the heel filler


114


in a similar shape.




Now referring to

FIGS. 24-32

, one embodiment of the method of construction of the open toe slipper


100


is illustrated.




The heel filler


114


and the sole filler


110


are attached to create a combined filler


130


as shown in

FIG. 29

, using an attachment method such as applying adhesive. Although use of adhesive is a preferred bonding method for joining the heel filler


114


to the sole filler


110


, it will be appreciated that many different attachment methods are available and could be used with the present invention. The heel pocket


118


may be attached to the perimeter edge of a heel region of the sock


109


, by stitching


146


, for example. The heel pocket


118


is sewn to an outer curved edge


142


of the sock


109


. The inside upper straight edge


144


of the heel pocket


118


is not attached to the sock


109


. The combined filler


130


can thus be inserted into the heel pocket


118


as shown in FIG.


30


.




As shown in

FIG. 31

, the vamp


102


and the vamp liner


120


are placed so that an outer surface


129


of the vamp and an outer surface


131


of the vamp liner are facing each other. Inseam stitching


130


is performed around the inside edges of the forward projections


122


,


126


and the rearward projections


124


,


128


as shown in FIG.


32


. The vamp


102


and the vamp liner


120


are then turned inside out so that the outer surface


129


of the vamp


102


and the outer surface


131


of the vamp liner


120


are exposed. Finished seamed edges are then visible from the outside due to stitching


132


, which is now hidden.




Once inseamed, the combined vamp and lining, or upper


106


are then stitched together across the two extremities ends using stitching


134


in FIG.


33


. This stitching results in a combined vamp


102


and vamp liner


120


with an encasement around the forward and rear sections as shown in FIG.


33


. This upper


106


is then stitched closed around the bottom perimeter


136


as shown by stitching


138


.




The vamp may be joined to the sock


109


, by stitching


140


as shown in FIG.


34


. The order of many of the assembly steps may be changed within the scope of the present invention. For example, the heel pocket


118


may be attached to the sock


109


after the vamp


102


is sewn to the sock


109


. Other assembly step variations are also possible for the present invention.




The upper


106


is secured on the platform surface


18


of the outsole


12


. The vertical sidewalls


24


are stitched to the upper as shown by stitching


144


in

FIG. 36. A

completed open toe clog slipper


100


is shown in

FIG. 24

that has been constructed by these previously described steps. A finished product is accomplished which provides for an open toe construction with finished edges and a perimeter that is stitched through the vertical walls of an outsole.




By combining cloth uppers having forward and rearward projections with the molded outsole


12


, it is possible to construct an open toe product with a finished edge that does not require attachment of the upper through the bottom outsole. The unique construction of the present invention also allows for the final appearance of a bound construction without the use of a separate piece of cloth binding.




The above specification, examples and data provide a complete description of the manufacture and use of the composition of the invention. Since many embodiments of the invention can be made without departing from the spirit and scope of the invention, the invention resides in the claims hereinafter appended.



Claims
  • 1. A method of manufacture of a slipper, comprising:providing an outsole including a heel region, an instep region and a toe region, the outsole comprising: an exterior surface comprising an outsole side surface and an outsole bottom surface, the outsole bottom surface including a tread pattern, a sidewall extending along a perimeter of the outsole and forming a part of the outsole side surface, and a supporting sole structure including a platform surface; providing a vamp; and attaching a lower perimeter of the vamp to at least a portion of the sidewall extending along a perimeter of the outsole; comprising: inverting the vamp so that a top surface of the vamp is facing the bottom surface of the outsole; stitching the lower perimeter of the vamp to the sidewall: and turning the vamp so that the lower perimeter of the vamp is positioned inside the sidewall.
  • 2. The method of claim 1, wherein the step of attaching comprises stitching using vertically oriented stitches.
  • 3. The method of claim 1, wherein the vamp comprises a molded polymeric material, and the step of attaching further comprises stitching the lower perimeter of the vamp to the sidewall at the toe and instep regions.
  • 4. The method of claim 1, wherein the vamp is a closed-toe vamp.
  • 5. The method of claim 1 wherein the step of stitching the vamp to the sidewall includes stitching using vertically-oriented stitches.
  • 6. The method of claim 1 wherein the vamp comprises a molded polymeric upper.
  • 7. The method of claim 6 wherein a bottom perimeter of the vamp includes a tapered portion that is thinner than the remainder of the vamp.
  • 8. The method of claim 1 wherein the outsole comprises a molded polymeric material.
  • 9. The method of claim 1 wherein the supporting sole structure of the outsole provides elevation and includes open cells for reducing weight.
  • 10. (New) The method of claim 9 wherein the cells of the supporting sole structure extend from the outsole bottom vertically through the supporting sole structure to the platform surface.
  • 11. The method of claim 10 wherein the supporting sole structure further comprises lattice walls, wherein the lattice walls provide the cells therebetween and the lattice walls have a height, wherein the height of the lattice walls in the heel region is greater than in the instep region.
  • 12. The method of claim 1 wherein the supporting sole structure of the outsole is provided with a tapered thickness across a length thereof extending from the toe region to the heel region and is thickest in the heel region.
  • 13. The method of claim 1 wherein the sidewall extends above the platform surface for a distance of between about one-eighth inch and about three-eighths inch.
  • 14. The method of claim 1 further comprising attaching an insole securement strap to a bottom surface of a heel region of the insole and to the sidewall of the outsole at the heel region.
  • 15. The method of claim 1 further comprising attaching an extended insole securement strap to a bottom surface of the insole and to the sidewall of the outsole at the heel region and at the toe region.
  • 16. The method of claim 1 wherein the vamp and the outsole are sewn together by thread providing an exposed stitch along the outsole sidewall.
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Entry
Dearfoams®, Spring/Summer 1993 Catalog plus price lists (14 pgs.).*
Dearfoams®, Fall/Winter 1993 Catalog (16 pgs.).*
Dearfoams® Slippers, Spring/Summer 1994 Catalog (8 pgs.).*
Dearfoams® Slippers, Fall/Winter 1994 Catalog (8 pgs.).*
Dearfoams® for Women, Spring/Summer 1995 Promotional Brochure (6 pgs.).*
Dearfoams®, Fall/Winter 1995 Promotional Brochure (8 pgs.).*
Dearfoams®, Fall/Winter 1996 Promotional Brochure (8 pgs.).*
Dearfoams® Catalog, p. 5, item DF615, Slipper (Fall/Winter 1995).
Dearfoams® Catalog, p. 4, item DF820, Clog (Fall/Winter 1993).