U.S. patent application number 10/136572 was filed with the patent office on 2002-11-14 for flex sole with mesh insert enhancement.
This patent application is currently assigned to BBC International Ltd.. Invention is credited to Hernandez, Homar.
Application Number | 20020166262 10/136572 |
Document ID | / |
Family ID | 46279124 |
Filed Date | 2002-11-14 |
United States Patent
Application |
20020166262 |
Kind Code |
A1 |
Hernandez, Homar |
November 14, 2002 |
Flex sole with mesh insert enhancement
Abstract
A shoe has an upper, an insole and an outsole. A mesh is
integrated to the bottom of the outsole to form an integrated
mesh/outsole. The mesh and the outsole may be molded in a single
injection molding step or the mesh may be molded to the outsole.
The mesh is typically made of fabric, polymer and/or metal and
preferably nylon.
Inventors: |
Hernandez, Homar; (Boca
Raton, FL) |
Correspondence
Address: |
DARBY & DARBY P.C.
Post Office Box 5257
New York
NY
10150-5257
US
|
Assignee: |
BBC International Ltd.
|
Family ID: |
46279124 |
Appl. No.: |
10/136572 |
Filed: |
April 29, 2002 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10136572 |
Apr 29, 2002 |
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09347051 |
Jul 2, 1999 |
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6408544 |
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Current U.S.
Class: |
36/103 |
Current CPC
Class: |
A43B 1/0009 20130101;
A43B 13/186 20130101; A43B 13/188 20130101 |
Class at
Publication: |
36/103 |
International
Class: |
A43B 013/00 |
Claims
What is claimed is:
1. A method for making a shoe, comprising the steps of: providing
an upper, a mesh, and an outsole, wherein the outsole comprises a
bottom; integrating the mesh to the bottom of the outsole forming
an integrated mesh/outsole, wherein the mesh functions as a
integral part of the outsole.
2. The method of claim 1, wherein the outsole is made of thermal
plastic rubber (TPR).
3. The method of claim 1, further comprising the step of assembling
the upper, the mesh, and the outsole.
4. The method of claim 1, wherein the mesh further comprises a
weave.
5. The method of claim 1, further comprising the step of assembling
the upper with the integrated mesh/outsole.
6. The method of claim 1 further comprising the step of bonding the
upper to the mesh/outsole combination in a single injection molding
step following the integrating step.
7. The method of claim 1, further comprising the step of bonding
the mesh and the outsole in a single injection molding step.
8. The method of claim 7, wherein the mesh is located at about the
bottom of an outsole mold prior to the injection molding step.
9. The method of claim 1, wherein the mesh is selected from the
group consisting of fabric, polymers, metal or a combination
thereof.
10. The method of claim 1, wherein the mesh is nylon.
11. A shoe, comprising: an upper; an outsole comprising a bottom;
and a mesh being integral to the bottom of the outsole and
functioning as an integral part of the outsole.
12. The shoe of claim 11, wherein the outsole is made of thermal
plastic rubber (TPR).
13. The shoe of claim 11, wherein the upper, the mesh and the
outsole are bonded in a single injection molding step.
14. The shoe of claim 11, wherein the mesh is selected from the
group consisting of fabric, polymer, metal or a combination
thereof.
15. The shoe of claim 11, wherein the mesh is nylon.
16. The shoe of claim 11, wherein the mesh further comprises a
weave.
Description
RELATED APPLICATIONS
[0001] The present application is a continuation-in-part (CIP) and
claims the priority of copending U.S. application Ser. No.
09/347,051 filed Jul. 2, 1999, entitled "FLEX SOLE", which is
incorporated herein by reference. The invention is also related to
U.S. application Ser. No. 09/373,122 filed Aug. 12, 1999, and
issued Apr. 9, 2002 as U.S. Pat. No. 6,367,172 entitled "FLEX
SOLE", U.S. application Ser. No. 09/496,922 filed Feb. 2, 2000
entitled "FLEX SOLE" and U.S. application Ser. No. 09/497,299 filed
Feb. 2, 2000 entitled "FLEX SOLE WITH EVA ENHANCEMENT", which are
also incorporated by reference herein.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The invention relates to footwear or shoes, particularly
walking or athletic shoes constructed with a mesh in the
outsole.
[0004] 2. Description of the Related Art
[0005] Footwear can be designed to provide a variety of stylistic
and functional benefits. Shoes normally worn for active use, e.g.,
extensive walking or fitness sports, typically consist of an upper
(of canvas, leather or other supple fabric material) joined to an
outer sole (of rubber, leather or other durable material) having a
bottom that contacts the ground. The inner surface of the outer
sole, i.e., outsole, has distinct regions that contact
corresponding portions of the wearer's foot. For example, the
outsole can have distinct heel, arch and plantar regions that
underlie the respective portions of the foot. These regions of the
outsole can be specifically adapted to provide functional benefits
to the parts of the foot that are supported by them.
[0006] The outsole needs to embody both flexible and durable
characteristics. First, it must be durable to resist wear from
contact with the pavement and torsional stresses. However, it must
also be flexible so to bend with the foot during walking or
running, and must further cushion the shock of the impact due to
foot motion.
[0007] A highly flexible inner sole, i.e., insole, is usually
provided so that it directly contacts the wearer's foot and it is
positioned between the foot and the upper surface of the outsole.
The insole typically has an upper surface of fabric or soft leather
to give added comfort and breathability to the sole of the
foot.
[0008] Typical outsoles are made of rubber, usually a thermal
plastic rubber (TPR). The hardness of the outsole will determine
how fast it is worn down during use. The harder the TPR, the longer
the shoe outsole will last. However, the harder the outsole, the
less comfortable the shoe is to the wearer. Previous applications
have disclosed methods to make the shoe more comfortable to the
wearer by placing ethyl-vinyl-acetate (EVA) pads into cavities
formed in the TPR outsole to soften the impact of the shoe with the
ground, while still retaining the wear resistance of the outsole.
The wear on the outsole will only occur at certain portions of the
foot. The portions that typically wear fastest are the heel section
and the plantar section. As a result, additional rubber is added to
the entire outsole, even though, only the heel and plantar portions
wear. However, the outsole must still be flexible enough not to
reduce the overall flexibility of the shoe. Reduced flexibility can
lead to wearer discomfort.
[0009] Related to the wear characteristics is the strength of the
outsole itself. The outsole will have a certain strength and
typically it can only be increased by increasing the volume of
rubber in the outsole.
[0010] The weight of a shoe also detracts from the comfort of the
wearer, particularly for an athletic shoe. Thus, it would be
advantageous if increased wear resistance could be achieved in a
shoe, without a significant loss of flexibility and with a
reduction in weight.
[0011] Another important feature in footwear is its cosmetic
appearance. A shoe must be appealing and both the upper and the
outsole contribute to a shoe's overall appearance. Some of the
cosmetic appeal of a shoe, especially an athletic shoe, is the
tread pattern on the bottom of the outsole. Different combinations
of tread pattern and colors, but utilizing just rubber, are well
known in the art. However, if new styles, patterns and color
combinations could be designed without increasing the cost, weight
or strength of the shoe, it would be beneficial to the
manufacturer.
[0012] Therefore, there is a need for a shoe having additional wear
resistance in the heavy wear regions of the shoe. The increased
wear resistance should not effect the properties of the outsole
rubber. It should also be able to be manufactured in an existing
step to remove the need for any additional step or cost. Also,
there is a desire for different styling and patterns to increase
the appeal of the shoe.
[0013] Frequently shoes are made outside the United States and are
imported into the country. Trade tariffs or duties are levied on
these products when they enter the country. The amount of these
duties depends on the quantity and types of materials used to make
the shoes. Therefore, it would be advantageous if a shoe with
lighter weight and greater wear resistance could be made with
material that would cause a reduction in the duty on the shoe.
SUMMARY OF THE INVENTION
[0014] It is the foregoing and various other drawbacks of the prior
art which the present invention seeks to overcome by providing a
shoe having an upper, an insole, and a rubber outsole with a mesh
integrated into the bottom of the outsole to form an integrated
mesh/outsole. The mesh and the outsole may be molded in a single
injection molding step. The mesh is typically made of fabric,
polymer and/or metal and preferably nylon.
[0015] Also, the shoe can be formed so the mesh and outsole are
bonded in a single injection molding step or the upper, insole,
mesh and outsole may bonded in a single injection molding step.
[0016] The mesh is light weight, but increases the wear resistance
of the outsole without the addition of extra amounts of rubber. The
mesh is inexpensive itself, and shoes with an integrated
mesh/outsole have a lower duty assessed than shoes with pure rubber
outsoles.
BRIEF DESCRIPTION OF THE DRAWING FIGURES
[0017] The above and still further objects, features and advantages
of the present invention will become apparent upon consideration of
the following detailed description of a specific embodiment
thereof, especially when taken in conjunction with the accompanying
drawings wherein the reference figures are utilized to designate
like components, and wherein:
[0018] FIG. 1 is an exploded perspective view of the present
invention in a sports shoe;
[0019] FIG. 2 is a partial perspective view of the sole made
according to the present invention;
[0020] FIG. 3 is a cross section taken at lines 3-3 of the sole of
FIG. 2;
[0021] FIG. 4 is a bottom view of a shoe according to a first
preferred embodiment of the invention;
[0022] FIG. 5 is an exploded perspective view of a second
embodiment of the present invention with an inserted sole pad in a
sports shoe;
[0023] FIG. 6 is a partial perspective view of the embodiment of
the sole illustrated in FIG. 5;
[0024] FIG. 7 is a cross section taken at lines 7-7 of the sole of
FIG. 6;
[0025] FIG. 8 is a side view of another embodiment of the outsole
of the present invention with sole and heel pads;
[0026] FIG. 9 is an exploded diagram illustrating the method for
making a shoe according to the invention;
[0027] FIG. 10 is a flow chart illustrating an embodiment of a
molding process for making a shoe according to the invention in
which a bonding step is used; and
[0028] FIG. 11 is a flow chart illustrating an alternate embodiment
of a molding process for making a shoe according to the invention,
in which an injection molding step is used.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0029] Referring now to FIGS. 1-4, a shoe 10, in accordance with
the present invention is illustrated. The shoe 10 includes an upper
12, an insole 14, a rubber outsole 16 and a mesh 15. The mesh 15 is
integrated into a bottom 18 of the outsole 16 to form an integrated
mesh/outsole 20. The mesh 15 may be integrated into the outsole 16
in a single injection molding step.
[0030] The outsole 16 can be made of thermal plastic rubber (TPR).
Typically, the outsole 16 is formed with a heel 24, an arch 26, and
a plantar region 22. The outsole 16 may further comprise a
plurality of ribs 32.
[0031] The mesh 15 is typically made of fabric, polymer and/or
metal. The mesh 15 is preferably nylon and can have numerous types
of weaves. The patterns of the interlacing threads 30 of the mesh
15 can vary greatly. First, the materials may be combined to
enhance certain properties. Next, the colors of the threads 30 can
be altered to give a varying color scheme. More detailed color
combinations and patterns can be created by weaving a mesh 15, than
can be formed in rubber. Each particular color in rubber must be
separately mixed and formed, whereas forming a multi-colored mesh
15 is a simpler process and less expensive. The colors and patterns
of the weave can now exactly match that of the upper 12, if so
desired. Also, the weave can have threads of different density,
this will alter the weight and pattern of the mesh 15 and be part
of the determination of the strength of the mesh 15.
[0032] The shoe 10 can be formed so the mesh 15 and outsole 16 are
bonded in a single injection molding step. Alternately, the shoe 10
can be formed so the upper 12, the insole 14, and the outsole 16
are formed or bonded to each other and integrated with the mesh 15
in a single injection molding step.
[0033] FIG. 3 illustrates a cross section of the sole taken at
lines 3-3 of FIG. 2. The mesh 15 is integrated to the bottom 18 of
the outsole 16 so the mesh 15 comes in contact with the ground
surface. The mesh 15 can be of a variable thickness depending on
the weave and the thread count.
[0034] Referring now to FIGS. 5, 6 and 7, an alternate embodiment
is illustrated in which the outsole 16 is formed from
ethyl-vinyl-acetate (EVA), and has one or more cavities 50 formed
therein. The cavities 50 may be in a section of the outsole 16 with
ribs 32, so that the ribs 32 surround the cavity or cavities
50.
[0035] Pads 52, which may, for example, be made of EVA, may be
formed to match the shape of the cavity 50. As an alternative, the
pads 52 may be made of TPR or some other rubberlike material. The
pads 52 may be made softer then the outsole 16. The shape and depth
of the cavity 50 (and therefore that of the pad 52) can be concave
and deep, slim and shallow, or any other shape and depth as
desired.
[0036] During formation, mesh 15 is placed within the cavity 50 so
the mesh 15 comes in contact with the ground surface. The mesh 15
can be the thickness of the entire cavity 50 or just the thickness
of the outsole 16 prior to the formation of the ribs 32. The pad 52
can then be affixed over the mesh 15 to fill any gap between the
mesh 15 and the insole 14. This pad 52 may be affixed to the inner
periphery 34 of the ribs 32 or on a lip (not illustrated) formed at
the bottom of the cavity.
[0037] The mesh 15 may also be formed as part of the pad 52, and
when the edge 54 of the pad is affixed to the inner periphery 34 of
the cavity 50, the mesh 15 will be in contact with the ground
surface.
[0038] Additionally, as the wearer of the shoe 10 runs or
exercises, the front of the shoe 10, where the pad 52 may be
located, bends in a back and forth manner. In order to provide
increased flexibility in this regard, the pad may be formed with
grooves 56. The grooves 56 facilitate this bending of the shoe 10
and thus enhance its flexibility. Further, the removal of material
to make the grooves 56 also reduces the weight of the shoe, making
it even more lightweight.
[0039] According to another embodiment, illustrated in FIG. 8, the
outsole 16 may also contain a break 60. In this embodiment, the
outsole 16 is formed of a block 62 of material with two cavities
50A, 50B, filled with two pads 52A, 52B. The block 62 and the pads
52 are preferable formed of EVA, but may be made of other suitable
material, e.g. TPR. The mesh 15 and the outsole 16 of the plantar
region 22 and the heel region 24 are not connected at the bottom
break 60 and thus the block 62 is exposed to the ground surface.
The plantar region 22 and the heel region 24 are positioned so that
the bottom break 60 is generally located in the arch region 26,
which contributes to greater comfort and flexibility of the shoe
during wear. The lack of mesh 15 in this area is not detrimental,
since the arch region 26 rarely touches the ground and does not
experience much wear. However, bending and flexing of the outsole
16 is advantageously allowed at the bottom break 60 where the mesh
15 does not obstruct bending of the outsole 16. The pads 52A, 52B
may be less dense then the block 62.
[0040] Referring now to FIG. 9, depicted is a method for making an
alternate embodiment shoe that differs from that in FIG. 1. The
steps include providing an upper (not shown), and then molding an
insole 500 and an outsole 502, wherein the outsole 502 comprises a
heel 504, an arch 506, and a plantar region 508. Unlike FIG. 1, the
mesh 512 is not one continuous piece. Instead, it is selectively
placed at the heel 504 and plantar region 508. Next, the mesh 512
is integrated into the outsole 502 and the intergation allows the
mesh 512 to function as a integral part of the outsole 502. The
mesh 512 will be exposed and come in direct contact with the ground
surface (FIG. 4).
[0041] Once the integration step is complete, the upper (not
shown), insole 500, and the assembled outsole 502 can be bonded
together. The bonding of the insole 500 and mesh 512 with the
outsole 502 forms an integrated insole/outsole/mesh (not shown) and
that can be assembled to the upper. An additional embodiment may
include a midsole 514 which is bonded between the insole 500 and
the outsole/mesh combination.
[0042] Regardless of how the pieces are bonded, molded or
integrated, there may be a step of forming ribs 32 in the outsole
16. These ribs 32 can be formed using injection molding at the time
the outsole 16 is created.
[0043] Referring now to FIG. 10, a flow diagram for the production
of shoes according to an embodiment of the invention is
illustrated. A shoe is made by first producing an upper, a mesh and
an outsole (step 600). Then the mesh is placed on the bottom of the
outsole (step 602). Next, the mesh is integrated to the outsole
bottom using any conventional bonding technique that is known in
the art (step 606). The upper is then bonded to the lower (step
610).
[0044] FIG. 11 illustrates a flow diagram for the production of
shoes accoring to another embodiment of the invention. According to
FIG. 11, a shoe is formed using an injection molding technique.
First the mesh is formed or woven (step 700). Next the mesh insert
is placed into the outsole mold (step 704). The mold is then
brought to the correct temperature and pressure and the outsole
compound is injected into the mold (step 706). The combination is
allowed to cure in the mold until the proper density of the outsole
is reached (step 708). The outsole and mesh combination are then
removed from the mold (step 710). The combination outsole and mesh
is then bonded to the upper (step 712).
[0045] For athletic shoes imported into the United States which
have a full fabric upper, the duty is 371/2%. However, where the
outsole is made of fabric, the duty drops to 10%. With proper
application of the principles of the present invention, shoes may
be constructed to meet the 10% duty requirement. As a result, the
present invention not only results in a shoe with good wear
resistance, light weight, flexibility, easy manufacture and low
cost materials, but it also commands a lower duty when
imported.
[0046] Thus, while there have been shown, described, and pointed
out fundamental novel features of the invention as applied to
preferred embodiments thereof, it will be understood that various
omissions, substitutions, and changes in the form and details of
the devices illustrated, and in their operation, may be made by
those skilled in the art without departing from the spirit and
scope of the invention. For example, it is expressly intended that
all combinations of those elements and/or steps which perform
substantially the same function, in substantially the same way, to
achieve the same results are within the scope of the invention.
Substitutions of elements from one described embodiment to another
are also fully intended and contemplated. It is also to be
understood that the drawings are not necessarily drawn to scale,
but that they are merely conceptual in nature. It is the intention,
therefore, to be limited only as indicated by the scope of the
claims appended hereto.
* * * * *