US20110072691A1 - Shoe Cover - Google Patents
Shoe Cover Download PDFInfo
- Publication number
- US20110072691A1 US20110072691A1 US12/568,888 US56888809A US2011072691A1 US 20110072691 A1 US20110072691 A1 US 20110072691A1 US 56888809 A US56888809 A US 56888809A US 2011072691 A1 US2011072691 A1 US 2011072691A1
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- US
- United States
- Prior art keywords
- protective cover
- layer
- film
- frictional property
- heel
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
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Classifications
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B3/00—Footwear characterised by the shape or the use
- A43B3/16—Overshoes
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
- A43B23/02—Uppers; Boot legs
- A43B23/0205—Uppers; Boot legs characterised by the material
- A43B23/0235—Different layers of different material
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/12—Special watertight footwear
- A43B7/125—Special watertight footwear provided with a vapour permeable member, e.g. a membrane
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43C—FASTENINGS OR ATTACHMENTS OF FOOTWEAR; LACES IN GENERAL
- A43C11/00—Other fastenings specially adapted for shoes
- A43C11/14—Clamp fastenings, e.g. strap fastenings; Clamp-buckle fastenings; Fastenings with toggle levers
- A43C11/1493—Strap fastenings having hook and loop-type fastening elements
Definitions
- the present disclosure relates to a protective cover for footwear.
- the present disclosure provides a protective cover, and a method for producing the protective cover, for footwear.
- the protective cover includes a unitary body including a toe portion, a vamp portion, a quarter portion, a heel portion, and a throat portion.
- the body is formed from a multi-layer film including an outer layer that includes a first frictional property, an intermediate layer that is compliant, and an inner layer that includes a second frictional property, wherein each layer is water-resistant, the first frictional property is greater than the second frictional property, and the intermediate layer includes recycled plastic.
- FIG. 1 is a perspective view of a protective shoe cover during use in accordance with a principle of the present invention
- FIG. 2 is a side view of a protective shoe cover of the present invention
- FIG. 3 illustrates a cross-sectional view of a multilayer film that may be used according to a principle of the present invention
- FIG. 4 illustrates blank from which a plurality of protective shoe covers according to a principle of the present invention are manufactured
- FIG. 5 illustrates a manufacturing process that may be used to form a multilayer film.
- FIG. 1 illustrates protective cover 10 during use thereof
- FIG. 2 illustrates protective cover 10 during non-use.
- Protective cover 10 may be formed of a sheet material that lays flat when in non-use (i.e., protective cover 10 during non-use has substantially no depth), which enables protective cover 10 to be lightweight, easily folded, and stowed.
- Protective cover 10 has dimensions (described below), however, such that protective cover 10 is able to expand similar to a plastic bag and receive a ladies' shoe 12 .
- a protective cover Similar to a ladies' shoe 12 , a protective cover includes a toe portion 14 , a vamp portion 16 , a quarter portion 18 , a shank portion 20 , a heel portion 22 and a throat portion 24 .
- Throat portion 24 provides access into protective cover 10 and is shown in FIG. 2 in its fully expanded form.
- throat portion 24 may include a retention mechanism 26 . As shown in FIG. 1 , retention mechanism 26 pulls throat portion 24 snugly against a shin of the wearer to retain protective cover 10 snugly over shoe 12 .
- Protective cover 10 is particularly adapted for ladies' shoe 12 , and more particularly adapted for a ladies' high-heel shoe or pump.
- shank portion 20 and heel portion 22 each include a length sufficient to accommodate the entire length of a heel 28 of shoe 12 , which may range between 1 and 5 inches in length.
- shank portion 20 may include a radius of curvature 30
- heel portion 22 may include a radius of curvature 32 at a posterior portion 34 thereof.
- Anterior portion 36 of heel portion 22 may be substantially linear along an entire length thereof where it meets shank portion 20 .
- Vamp portion 16 may also include a radius of curvature 39 between throat portion 24 and toe portion 14 .
- protective cover 10 may include an overall length L 1 from toe portion 14 to quarter portion 18 that ranges between 12 and 16 inches. Preferably, length L 1 from toe portion 14 to quarter portion 18 is about 14 inches.
- a height H 1 of protective cover 10 from a bottom edge 38 to throat portion 24 may range between 8 and 14 inches, and preferably height H 1 is about 9 inches.
- a length L 2 of bottom edge 38 may range between 6 and 8 inches in length, and preferably length L 2 is about 7.75 inches.
- a height H 2 of toe portion 14 may range between 2 and 4 inches, and preferably is about 3 inches.
- a length L 3 between shank portion 20 and quarter portion 18 may range between 5 and 7 inches, and preferably length L 3 is about 6.25 inches.
- a height H 3 of posterior portion 34 may range between 3 and 4 inches, and preferably height H 3 is about 3.25 inches.
- a length L 4 of posterior portion 34 may range between 1 and 2 inches, and preferably length L 4 is about 1.375 inches.
- a length L 5 of throat portion 24 may range between 10 and 12 inches, and preferably length L 5 is about 11 inches. It should be noted, however, that due to retention mechanism 26 , throat portion 24 will have a length less than L 5 during use of protective cover 10 as retention portion 26 will gather throat portion around the wearer's ankle.
- a length L 6 of shank portion may range between 2 and 4 inches, and preferably length L 6 is about 3 inches.
- Protective covers 10 having the above-noted lengths and heights in the listed ranges are suitable for accommodating most sizes of ladies' shoes 12 . It should be appreciated, however, that for smaller or larger ladies' shoes 12 the range of dimensions will vary accordingly.
- protective cover 10 is described throughout the specification as being directed to a ladies' shoe 12 , the present disclosure should not be limited thereto. More particularly, protective cover 10 may be adopted for use over men's and children's footwear as well.
- heel portion 22 may have a height H 3 of about 0.5 inches.
- L 1 may be between about 9 to 16 inches
- L 2 may be between about 5 to 8 inches
- L 3 may be between about 4 to 8 inches
- L 5 may be between about 5 to 12 inches
- L 6 may be between about 1 to 4 inches.
- H 2 may be about the same as for ladies' shoe 12
- H 1 may be between about 6 and 10 inches.
- Protective cover 10 is preferably formed from a material that is water- and weather-resistant.
- protective cover 10 may be formed from a polymeric or plastic material. Forming protective cover 10 from polymeric or plastic materials enables protective cover 10 to be worn over ladies' shoe 12 during inclement weather to protect a ladies' shoe from damage from water, ice, snow, mud and any other debris that may damage shoe 12 .
- the polymeric or plastic material may be a clear and colorless material that enables the design of shoe 12 to be viewed during use of protective cover 10 . It should be understood, however, that protective cover 10 may be an opaque or colored material without departing from the spirit and scope of the present disclosure.
- linear low-density polyethylene may be used as a material that is water- and weather-resistant.
- Other polymeric or plastic materials that are water- and weather-resistant include polypropylene, and polyvinylchloride. Any other material, however, that meets the water- and weather-resistant criteria herein may also be used.
- protective cover 10 Forming protective cover 10 from a polymeric or plastic material such as polyethylene enables protective cover 10 to be light-weight and easily foldable, which enables protective cover 10 to be easily storable. Accordingly, protective cover 10 may be kept in a purse, wallet, glove compartment, or storage receptacle within an automobile that enables a wearer to use protective cover 10 , as needed.
- protective cover 10 may be formed from a multi-layer film 40 that includes an outer layer 42 that may include a frictional property (i.e., comprises an anti-slip resistant property), an intermediate layer 44 that is compliant, and an inner layer 46 (i.e., a layer that contacts the shoe) that includes another frictional property that may be substantially less in magnitude than outer layer 42 to enable the wearer to easily slide protective cover 10 over shoe 12 .
- Multi-layer film 40 preferably comprises a total thickness T that ranges between 1.0 and 4.0 mils.
- total thickness T of protective film 40 is about 2.0 mils.
- Outer layer 42 includes an anti-slip resistant property because outer layer 42 will be exposed to environments that may include water, ice, snow, and other debris when protective cover 10 is in use. Outer layer 42 , therefore, should provide sufficient frictional resistance during use to prevent, or at least substantially minimize, the wearer from slipping on the walking surface in the above-noted conditions. Further, if protective cover 10 is used indoors, outer layer 42 should provide sufficient frictional resistance to prevent, or at least substantially minimize, the wearer from slipping on surfaces such as carpet and smooth surfaces like tiled or wood floors.
- inner layer 46 may have a frictional property of substantially lesser magnitude than outer layer 42 to allow the wearer to easily place protective cover 10 over shoe 12 , it should be appreciated that the frictional property of inner layer 46 is sufficient to prevent protective cover 10 from slipping off shoe 12 during use thereof.
- Intermediate layer 44 may be a compliant layer. That is, intermediate layer 44 resists stretching and tearing, to increase the durability of protective cover 10 .
- intermediate layer 44 may include between 15-40% PCR (post consumer recycled plastic), and preferably intermediate layer includes about 25% PCR.
- PCR post consumer recycled plastic
- intermediate 44 is described as including environmentally conscious use of PCR, it should be understood that both outer layer 42 and inner layer 46 may also include PCR, without departing from the spirit and scope of the present disclosure. Using PCR in multi-layer film 40 decreases the cost of material used in manufacturing protective cover 10 , and provides the wearer with a protective cover that is environmentally conscious.
- Each layer of multilayer film 40 may be formed of the same material (such as polyethylene) or different materials.
- outer layer 42 may be formed of polyethylene
- intermediate layer 44 may be formed of polyvinylchloride
- inner layer 46 may be formed of polypropylene.
- any combination of materials for each layer is contemplated so long as outer layer 42 includes frictional properties that are anti-slip, inner layer 46 includes frictional properties that enable the wearer to easily slip protective cover 10 over shoe 12 , and intermediate layer is compliant.
- each layer of multilayer film 40 is formed of the same material (such as polyethylene)
- the frictional properties of both the outer layer 42 and inner layer 46 and the compliant property of intermediate layer 44 may be adjusted by modifying the molecular weight of the selected material of each layer.
- outer layer 42 may be formed of a form of the material having a lower molecular weight and density than inner layer 46 .
- intermediate layer 44 may comprise a form of the material including an environmentally conscious PCR content ranging between 15 and 40%, which increases the compliant property of the intermediate layer 44 . Adding PCR to the outer layer 42 and inner layer 46 may also adjust the molecular weight of these layers to adjust their respective frictional properties.
- Layers of multi-layer film 40 may also include materials such as ultraviolet (UV) inhibitors, anti-blocking materials, plasticizers, and the like.
- UV-inhibitors assist in preventing UV radiation from penetrating protective cover 10 , which decreases the likelihood of shoe 12 fading during use of protective cover 10 .
- UV inhibitors also protect the material that forms protective cover 10 from UV radiation, which can weaken the polymer or plastic's strength and, if colored, fade its color.
- Anti-blocking materials assist in preventing protective covers 10 from sticking together during packaging of protective covers 10 .
- Plasticizers may be used to assist in manufacturing of protective cover 10 .
- protective cover 10 is described above as being formed of multi-layer film 40 , the present disclosure should not be limited thereto.
- protective cover 10 may be formed of a single layer film, a dual layer film, or any other number of films, as desired so long as protective cover 10 is suitable for remaining weather-resistant.
- protective cover 10 may retain the above-noted anti-slip properties by making an outer surface more slip-resistant relative to an inner surface by, for example, using various polymeric or plastic additives in the film, or by providing various additives to the outer and inner surfaces, respectively, by spraying, coating, or the like.
- a plurality of protective covers 10 may be formed from a blank 48 of multi-layer film 40 .
- Blank 48 may be formed by blown-film extrusion, also known as a tubular film process.
- the polymeric or plastic material (such as polyethylene) arrives at the manufacturing facility in pellet (resin) form.
- the machine operator pours the resin into a hopper 50 , which feeds the resin into an extruder 52 .
- Heating elements 54 and turning of the extruder screw (not shown) melts the resin into a molten form and forces it through extruder 52 .
- extruder 52 may be provided with a circular die 56 located downstream from extruder 52 so that as the molten resin flows evenly and over circular die 56 , the sheet material will emerge as a tube 60 .
- the tube 60 is then fed through a pulley system 62 that pulls tube 60 .
- the machine operator inserts an air gun (not shown) into tube 60 to blow air into sheet 58 , which increases a diameter of tube 60 as it is pulled by pulley system 62 .
- tube 60 is fed through a guide 64 , which forces tube 62 into a layflat form 66 .
- tube 60 in layflat form 66 is rolled until protective covers 10 are to be formed therefrom in a die-cutting and sealing process.
- multi-layer film 40 To form multi-layer film 40 , three extruders 52 are used that each extrude material for outer layer 42 , intermediate layer 44 , and inner layer 46 , respectively. This enables, as stated above, each layer to be separately formed to have different properties (e.g., anti-slip, compliant, UV-resistant, etc).
- sheets 58 As sheets 58 emerge from extruders 52 , sheets 58 are simultaneously fed through circular die 56 , which is located downstream from extruders 52 and fuses each layer together to form multilayer film 40 in the shape of tube 60 . Tube 60 is then fed through pulley system 62 that pulls tube 60 .
- tube 60 As pulley system 62 is pulling tube 60 , the machine operator inserts the air gun (not shown) into tube 60 to insert air therein, which increases the diameter of tube 60 as it is pulled by pulley system 62 . Once tube 60 reaches the desired diameter, tube 60 is fed through a guide 64 , which forces tube 60 into a layflat form 66 . Subsequently, tube 60 in layflat form 66 is rolled until protective covers 10 are to be formed therefrom in a die-cutting and sealing process.
- the air gun not shown
- FIG. 4 illustrates the outline 66 of protective covers 10 to be die cut and sealed during the die-cutting and sealing process.
- Lines 68 represent portions of multilayer film 40 that are sealed to enclose and complete formation protective cover 10 .
- a heat sealing process may be used to cut and seal protective cover 10 along lines 66 and 68 .
- a heated die (not shown) having a shape that corresponds to outline 66 of protective cover 10 is pressed against blank 48 for a predetermined dwell time, which seals portions of multilayer film 40 along lines 68 and cuts protective covers 10 from blank 48 along lines 66 .
- lines 68 may be sealed sonically, vibrationally, by laser, or any other process known to one skilled in the art.
- Line 70 represents a separation line of adjacent protective covers that may be perforated by the heated die. When line 70 is cut, throat portion 24 is formed.
- retention mechanism 26 may be incorporated into throat portion 24 .
- retention mechanism may be an elastic band.
- Retention mechanism 26 should not be limited thereto.
- throat portion 24 may be slightly folded and sealed to provide a sleeve that may accommodate a lace or drawstring that may act as retention mechanism 26 .
- Retention mechanism 26 may also comprise VELCRO® or a buckle such as a hook-eye. Regardless, when protective cover 10 is provided with retention mechanism 26 , dimension of throat portion 24 pulls throat portion 24 to a dimension less than a length L 5 of throat portion 24 illustrated in FIG.
- retention mechanism 26 provides a manner in which to secure protective cover 10 to a wearer's foot or shoe and prevent protective cover 10 from sliding off the wearer's foot during use thereof, and prevents weather (i.e., rain, snow, ice, debris, etc.) from entering protective cover 10 during use thereof.
- protective cover 10 provides an inexpensive, lightweight, and foldable device for protecting ladies' footwear.
- Protective cover 10 may be easily stowed and used, as weather conditions require.
- protective cover 10 may be formed from a polymeric or plastic film
- protective cover 10 enables the design of shoe 12 to be viewed during use thereof.
- protective cover 10 may be formed from multi-layer film 40
- protective cover 10 may be provided with a plurality of different properties, including anti-slip, weather-resistant, anti-UV, etc., without limitation.
- the use of recycled plastic provides an environmentally conscious protective cover 10 . Due to retention mechanism 26 , protective cover 10 is also adapted to remain snugly over shoe 12 during use thereof, while expandable to easily place protective cover 10 over shoe 12 .
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Abstract
A protective cover, and a method for producing the protective cover, for footwear. The protective cover includes a unitary body including a toe portion, a vamp portion, a quarter portion, a heel portion, and a throat portion. The body is formed from a multi-layer film including an outer layer that includes a first frictional property, an intermediate layer that is compliant, and an inner layer that includes a second frictional property, wherein each layer is water-resistant and the first frictional property is greater than the frictional anti-slip property.
Description
- The present disclosure relates to a protective cover for footwear.
- This section provides background information related to the present disclosure which is not necessarily prior art.
- The cost of footwear has always been relatively high and continues to rise. As such, wearers do not wish to damage their shoes and ruin them prematurely. This is particularly true where dirt, rain, snow, ice, or other materials or compounds can contact and damage the uppers and outer soles of the shoes. Further, if shoes get wet, the wearer's feet may become uncomfortably damp throughout the day, which may cause the wearer to feel cold. Accordingly, shoe covers were developed to protect shoes in adverse weather conditions. Many of these shoe covers, however, are costly and/or unwieldy to use.
- Consumers of footwear today opt to invest in particular shoes not only for comfort features but with an eye towards fashion. The trend of foot apparel in the marketplace is towards style, design, brand name, and expense. Footwear is representative of an individual's particular taste and view towards fashion. Accordingly, today's consumers are opting to invest in costly footwear. There exists a continued need, therefore, to provide a low cost, easy to use means of protecting and preserving the appearance and comfort of the shoes of the wearer's choice.
- This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.
- The present disclosure provides a protective cover, and a method for producing the protective cover, for footwear. The protective cover includes a unitary body including a toe portion, a vamp portion, a quarter portion, a heel portion, and a throat portion. The body is formed from a multi-layer film including an outer layer that includes a first frictional property, an intermediate layer that is compliant, and an inner layer that includes a second frictional property, wherein each layer is water-resistant, the first frictional property is greater than the second frictional property, and the intermediate layer includes recycled plastic.
- Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
- The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.
-
FIG. 1 is a perspective view of a protective shoe cover during use in accordance with a principle of the present invention; -
FIG. 2 is a side view of a protective shoe cover of the present invention; -
FIG. 3 illustrates a cross-sectional view of a multilayer film that may be used according to a principle of the present invention; -
FIG. 4 illustrates blank from which a plurality of protective shoe covers according to a principle of the present invention are manufactured; and -
FIG. 5 illustrates a manufacturing process that may be used to form a multilayer film. - Corresponding reference numerals indicate corresponding parts throughout the several views of the drawings.
- Example embodiments will now be described more fully with reference to the accompanying drawings.
- Referring to
FIGS. 1 and 2 , aprotective cover 10 for ladies' footwear will be described.FIG. 1 illustratesprotective cover 10 during use thereof, andFIG. 2 illustratesprotective cover 10 during non-use.Protective cover 10 may be formed of a sheet material that lays flat when in non-use (i.e.,protective cover 10 during non-use has substantially no depth), which enablesprotective cover 10 to be lightweight, easily folded, and stowed.Protective cover 10 has dimensions (described below), however, such thatprotective cover 10 is able to expand similar to a plastic bag and receive a ladies'shoe 12. - Similar to a ladies'
shoe 12, a protective cover includes atoe portion 14, avamp portion 16, aquarter portion 18, ashank portion 20, aheel portion 22 and athroat portion 24.Throat portion 24 provides access intoprotective cover 10 and is shown inFIG. 2 in its fully expanded form. To ensure thatprotective cover 10 remains snugly over ashoe 12,throat portion 24 may include aretention mechanism 26. As shown inFIG. 1 ,retention mechanism 26 pullsthroat portion 24 snugly against a shin of the wearer to retainprotective cover 10 snugly overshoe 12. -
Protective cover 10 is particularly adapted for ladies'shoe 12, and more particularly adapted for a ladies' high-heel shoe or pump. In this regard,shank portion 20 andheel portion 22 each include a length sufficient to accommodate the entire length of aheel 28 ofshoe 12, which may range between 1 and 5 inches in length. To accommodate various contours and shapes of different ladies'shoes 12,shank portion 20 may include a radius of curvature 30, whileheel portion 22 may include a radius of curvature 32 at a posterior portion 34 thereof.Anterior portion 36 ofheel portion 22 may be substantially linear along an entire length thereof where it meetsshank portion 20.Vamp portion 16 may also include a radius of curvature 39 betweenthroat portion 24 andtoe portion 14. - To accommodate most ladies'
shoes 12,protective cover 10 may include an overall length L1 fromtoe portion 14 toquarter portion 18 that ranges between 12 and 16 inches. Preferably, length L1 fromtoe portion 14 toquarter portion 18 is about 14 inches. A height H1 ofprotective cover 10 from abottom edge 38 tothroat portion 24 may range between 8 and 14 inches, and preferably height H1 is about 9 inches. A length L2 ofbottom edge 38 may range between 6 and 8 inches in length, and preferably length L2 is about 7.75 inches. A height H2 oftoe portion 14 may range between 2 and 4 inches, and preferably is about 3 inches. A length L3 betweenshank portion 20 andquarter portion 18 may range between 5 and 7 inches, and preferably length L3 is about 6.25 inches. A height H3 of posterior portion 34 may range between 3 and 4 inches, and preferably height H3 is about 3.25 inches. A length L4 of posterior portion 34 may range between 1 and 2 inches, and preferably length L4 is about 1.375 inches. A length L5 ofthroat portion 24 may range between 10 and 12 inches, and preferably length L5 is about 11 inches. It should be noted, however, that due toretention mechanism 26,throat portion 24 will have a length less than L5 during use ofprotective cover 10 asretention portion 26 will gather throat portion around the wearer's ankle. Lastly, a length L6 of shank portion may range between 2 and 4 inches, and preferably length L6 is about 3 inches.Protective covers 10 having the above-noted lengths and heights in the listed ranges are suitable for accommodating most sizes of ladies'shoes 12. It should be appreciated, however, that for smaller or larger ladies'shoes 12 the range of dimensions will vary accordingly. - It should be understood that although
protective cover 10 is described throughout the specification as being directed to a ladies'shoe 12, the present disclosure should not be limited thereto. More particularly,protective cover 10 may be adopted for use over men's and children's footwear as well. To accommodate most men's and children's footwear,heel portion 22 may have a height H3 of about 0.5 inches. Moreover, L1 may be between about 9 to 16 inches, L2 may be between about 5 to 8 inches, L3 may be between about 4 to 8 inches, L5 may be between about 5 to 12 inches, and L6 may be between about 1 to 4 inches. H2 may be about the same as for ladies'shoe 12, while H1 may be between about 6 and 10 inches. -
Protective cover 10 is preferably formed from a material that is water- and weather-resistant. In particular,protective cover 10 may be formed from a polymeric or plastic material. Formingprotective cover 10 from polymeric or plastic materials enablesprotective cover 10 to be worn over ladies'shoe 12 during inclement weather to protect a ladies' shoe from damage from water, ice, snow, mud and any other debris that may damageshoe 12. Although not required by the present disclosure, the polymeric or plastic material may be a clear and colorless material that enables the design ofshoe 12 to be viewed during use ofprotective cover 10. It should be understood, however, thatprotective cover 10 may be an opaque or colored material without departing from the spirit and scope of the present disclosure. As a material that is water- and weather-resistant, linear low-density polyethylene may be used. Other polymeric or plastic materials that are water- and weather-resistant include polypropylene, and polyvinylchloride. Any other material, however, that meets the water- and weather-resistant criteria herein may also be used. - Forming
protective cover 10 from a polymeric or plastic material such as polyethylene enablesprotective cover 10 to be light-weight and easily foldable, which enablesprotective cover 10 to be easily storable. Accordingly,protective cover 10 may be kept in a purse, wallet, glove compartment, or storage receptacle within an automobile that enables a wearer to useprotective cover 10, as needed. - Referring to
FIG. 3 ,protective cover 10 may be formed from amulti-layer film 40 that includes anouter layer 42 that may include a frictional property (i.e., comprises an anti-slip resistant property), anintermediate layer 44 that is compliant, and an inner layer 46 (i.e., a layer that contacts the shoe) that includes another frictional property that may be substantially less in magnitude thanouter layer 42 to enable the wearer to easily slideprotective cover 10 overshoe 12.Multi-layer film 40 preferably comprises a total thickness T that ranges between 1.0 and 4.0 mils. Preferably, total thickness T ofprotective film 40 is about 2.0 mils. -
Outer layer 42 includes an anti-slip resistant property becauseouter layer 42 will be exposed to environments that may include water, ice, snow, and other debris whenprotective cover 10 is in use.Outer layer 42, therefore, should provide sufficient frictional resistance during use to prevent, or at least substantially minimize, the wearer from slipping on the walking surface in the above-noted conditions. Further, ifprotective cover 10 is used indoors,outer layer 42 should provide sufficient frictional resistance to prevent, or at least substantially minimize, the wearer from slipping on surfaces such as carpet and smooth surfaces like tiled or wood floors. Althoughinner layer 46 may have a frictional property of substantially lesser magnitude thanouter layer 42 to allow the wearer to easily placeprotective cover 10 overshoe 12, it should be appreciated that the frictional property ofinner layer 46 is sufficient to preventprotective cover 10 from slipping offshoe 12 during use thereof. -
Intermediate layer 44 may be a compliant layer. That is,intermediate layer 44 resists stretching and tearing, to increase the durability ofprotective cover 10. To makeintermediate layer 44 compliant,intermediate layer 44 may include between 15-40% PCR (post consumer recycled plastic), and preferably intermediate layer includes about 25% PCR. Although intermediate 44 is described as including environmentally conscious use of PCR, it should be understood that bothouter layer 42 andinner layer 46 may also include PCR, without departing from the spirit and scope of the present disclosure. Using PCR inmulti-layer film 40 decreases the cost of material used in manufacturingprotective cover 10, and provides the wearer with a protective cover that is environmentally conscious. - Each layer of
multilayer film 40 may be formed of the same material (such as polyethylene) or different materials. For example,outer layer 42 may be formed of polyethylene,intermediate layer 44 may be formed of polyvinylchloride, andinner layer 46 may be formed of polypropylene. Regardless, any combination of materials for each layer is contemplated so long asouter layer 42 includes frictional properties that are anti-slip,inner layer 46 includes frictional properties that enable the wearer to easily slipprotective cover 10 overshoe 12, and intermediate layer is compliant. - If each layer of
multilayer film 40 is formed of the same material (such as polyethylene), the frictional properties of both theouter layer 42 andinner layer 46 and the compliant property ofintermediate layer 44 may be adjusted by modifying the molecular weight of the selected material of each layer. For example, to provideouter layer 42 with an anti-slip property,outer layer 42 may be formed of a form of the material having a lower molecular weight and density thaninner layer 46. Moreover, as stated above,intermediate layer 44 may comprise a form of the material including an environmentally conscious PCR content ranging between 15 and 40%, which increases the compliant property of theintermediate layer 44. Adding PCR to theouter layer 42 andinner layer 46 may also adjust the molecular weight of these layers to adjust their respective frictional properties. - Layers of
multi-layer film 40 may also include materials such as ultraviolet (UV) inhibitors, anti-blocking materials, plasticizers, and the like. UV-inhibitors assist in preventing UV radiation from penetratingprotective cover 10, which decreases the likelihood ofshoe 12 fading during use ofprotective cover 10. UV inhibitors also protect the material that formsprotective cover 10 from UV radiation, which can weaken the polymer or plastic's strength and, if colored, fade its color. Anti-blocking materials assist in preventingprotective covers 10 from sticking together during packaging of protective covers 10. Plasticizers may be used to assist in manufacturing ofprotective cover 10. - Although
protective cover 10 is described above as being formed ofmulti-layer film 40, the present disclosure should not be limited thereto. In this regard,protective cover 10 may be formed of a single layer film, a dual layer film, or any other number of films, as desired so long asprotective cover 10 is suitable for remaining weather-resistant. Further, ifprotective cover 10 is formed of a single layer or double layer film,protective cover 10 may retain the above-noted anti-slip properties by making an outer surface more slip-resistant relative to an inner surface by, for example, using various polymeric or plastic additives in the film, or by providing various additives to the outer and inner surfaces, respectively, by spraying, coating, or the like. - Now referring to
FIGS. 4 and 5 , a method for manufacturingprotective cover 10 will be described. As shown inFIG. 4 , a plurality ofprotective covers 10 may be formed from a blank 48 ofmulti-layer film 40.Blank 48 may be formed by blown-film extrusion, also known as a tubular film process. To produce blank 48 ofmulti-layer film 40, the polymeric or plastic material (such as polyethylene) arrives at the manufacturing facility in pellet (resin) form. The machine operator pours the resin into ahopper 50, which feeds the resin into anextruder 52.Heating elements 54 and turning of the extruder screw (not shown) melts the resin into a molten form and forces it throughextruder 52. - If
protective cover 10 is to be formed from a single-layer film (not shown),extruder 52 may be provided with acircular die 56 located downstream fromextruder 52 so that as the molten resin flows evenly and overcircular die 56, the sheet material will emerge as atube 60. Thetube 60 is then fed through apulley system 62 that pullstube 60. Aspulley system 62 is pullingtube 60, the machine operator inserts an air gun (not shown) intotube 60 to blow air intosheet 58, which increases a diameter oftube 60 as it is pulled bypulley system 62. Oncetube 60 reaches the desired diameter,tube 60 is fed through aguide 64, which forcestube 62 into alayflat form 66. Subsequently,tube 60 inlayflat form 66 is rolled until protective covers 10 are to be formed therefrom in a die-cutting and sealing process. - To form
multi-layer film 40, threeextruders 52 are used that each extrude material forouter layer 42,intermediate layer 44, andinner layer 46, respectively. This enables, as stated above, each layer to be separately formed to have different properties (e.g., anti-slip, compliant, UV-resistant, etc). Assheets 58 emerge fromextruders 52,sheets 58 are simultaneously fed throughcircular die 56, which is located downstream fromextruders 52 and fuses each layer together to formmultilayer film 40 in the shape oftube 60.Tube 60 is then fed throughpulley system 62 that pullstube 60. Aspulley system 62 is pullingtube 60, the machine operator inserts the air gun (not shown) intotube 60 to insert air therein, which increases the diameter oftube 60 as it is pulled bypulley system 62. Oncetube 60 reaches the desired diameter,tube 60 is fed through aguide 64, which forcestube 60 into alayflat form 66. Subsequently,tube 60 inlayflat form 66 is rolled until protective covers 10 are to be formed therefrom in a die-cutting and sealing process. -
FIG. 4 illustrates theoutline 66 ofprotective covers 10 to be die cut and sealed during the die-cutting and sealing process.Lines 68 represent portions ofmultilayer film 40 that are sealed to enclose and complete formationprotective cover 10. To cut and sealprotective cover 10 alonglines protective cover 10 is pressed against blank 48 for a predetermined dwell time, which seals portions ofmultilayer film 40 alonglines 68 and cutsprotective covers 10 from blank 48 alonglines 66. Alternatively, lines 68 may be sealed sonically, vibrationally, by laser, or any other process known to one skilled in the art.Line 70 represents a separation line of adjacent protective covers that may be perforated by the heated die. Whenline 70 is cut,throat portion 24 is formed. - After
protective covers 10 are formed as set forth above,retention mechanism 26 may be incorporated intothroat portion 24. As illustrated inFIGS. 1 and 2 , retention mechanism may be an elastic band.Retention mechanism 26, however, should not be limited thereto. In this regard, after cutting alongline 70,throat portion 24 may be slightly folded and sealed to provide a sleeve that may accommodate a lace or drawstring that may act asretention mechanism 26.Retention mechanism 26 may also comprise VELCRO® or a buckle such as a hook-eye. Regardless, whenprotective cover 10 is provided withretention mechanism 26, dimension ofthroat portion 24 pullsthroat portion 24 to a dimension less than a length L5 ofthroat portion 24 illustrated inFIG. 2 , but may enablethroat portion 24 to fully expand to length L5 in order to enable a wearer to place her foot andshoe 12 intoprotective cover 10. It should be understood, however, thatretention mechanism 26 provides a manner in which to secureprotective cover 10 to a wearer's foot or shoe and preventprotective cover 10 from sliding off the wearer's foot during use thereof, and prevents weather (i.e., rain, snow, ice, debris, etc.) from enteringprotective cover 10 during use thereof. - As described above,
protective cover 10 provides an inexpensive, lightweight, and foldable device for protecting ladies' footwear.Protective cover 10, therefore, may be easily stowed and used, as weather conditions require. Asprotective cover 10 may be formed from a polymeric or plastic film,protective cover 10 enables the design ofshoe 12 to be viewed during use thereof. Moreover, asprotective cover 10 may be formed frommulti-layer film 40,protective cover 10 may be provided with a plurality of different properties, including anti-slip, weather-resistant, anti-UV, etc., without limitation. Further, the use of recycled plastic provides an environmentally consciousprotective cover 10. Due toretention mechanism 26,protective cover 10 is also adapted to remain snugly overshoe 12 during use thereof, while expandable to easily placeprotective cover 10 overshoe 12. - The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same may also be varied in many ways. Such variations are not to be regarded as a departure from the invention, and all such modifications are intended to be included within the scope of the invention.
Claims (19)
1. A protective cover for footwear, comprising a unitary body including a toe portion, a vamp portion, a quarter portion, a heel portion, and a throat portion, said body formed from a film including an outer surface that includes a first frictional property and an inner surface that includes a second frictional property, wherein said film is water-resistant and said first frictional property is greater than said second frictional property.
2. The protective cover of claim 1 , wherein said film is a multi-layer film including an outer layer, an intermediate layer, and an inner layer.
3. The protective cover of claim 2 , wherein said outer layer includes said first frictional property, said intermediate layer includes a compliant property, and said inner layer includes said second frictional property.
4. The protective cover of claim 2 , wherein at least one layer of said multi-layer film is formed of a material including about 25% recycled material.
5. The protective cover of claim 2 , wherein said intermediate layer resists stretching and tearing.
6. The protective cover of claim 1 , wherein said throat portion includes a retention mechanism.
7. The protective cover of claim 6 , wherein said retention comprises an elastic band.
8. The protective cover of claim 6 , wherein said retention mechanism is one of an elastic band, a pull tie, a VELCRO® strap, and a buckle.
9. The protective cover of claim 1 , wherein said heel portion is sized to accommodate a heel of a ladies' high-heel shoe.
10. The protective cover of claim 1 , wherein said heel portion is sized to accommodate said heel having a length that ranges between 0.5 inch to 5 inches.
11. The protective cover of claim 1 , wherein said film is formed of polyethylene.
12. The protective cover of claim 2 , wherein said outer layer is formed of polyethylene having a lower density than polyethylene that forms said inner layer.
13. The protective cover of claim 2 , wherein said intermediate layer includes recycled polyethylene.
14. The protective cover of claim 1 , wherein said film includes an ultraviolet inhibitor.
15. A method for manufacturing a protective cover for footwear, comprising:
producing a multi-layer film including an outer layer that includes a first frictional property, an intermediate layer that is compliant, and an inner layer that includes a second frictional property, wherein each layer is water-resistant and said first frictional property is greater than said second frictional property;
forming said multi-layer film into a tube;
sealing an outline of the protective cover and after said outline is sealed, cutting the protective covers from said tube.
16. The method of claim 15 , further comprising providing the protective cover with a retention mechanism.
17. The method of claim 16 , wherein said retention mechanism is one of an elastic band, a pull tie, a VELCRO® strap, and a buckle.
18. The method of claim 15 , wherein said outline of the protective cover is adapted to accommodate a shoe including a heel having a length that ranges between 0.5 inch to 5 inches.
19. The method of claim 15 , wherein said outer layer is formed of a material having a lower density than said inner layer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/568,888 US20110072691A1 (en) | 2009-09-29 | 2009-09-29 | Shoe Cover |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/568,888 US20110072691A1 (en) | 2009-09-29 | 2009-09-29 | Shoe Cover |
Publications (1)
Publication Number | Publication Date |
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US20110072691A1 true US20110072691A1 (en) | 2011-03-31 |
Family
ID=43778706
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/568,888 Abandoned US20110072691A1 (en) | 2009-09-29 | 2009-09-29 | Shoe Cover |
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US (1) | US20110072691A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160106179A1 (en) * | 2014-10-16 | 2016-04-21 | Michael Anthony Daye | Shoe Poncho |
USD781537S1 (en) | 2015-03-04 | 2017-03-21 | Mark Ungania | Footwear cover |
US9635900B1 (en) * | 2013-12-06 | 2017-05-02 | Gwendolyn Rolle | Shoe glove |
US20170265562A1 (en) * | 2016-03-16 | 2017-09-21 | Belinda Mullen | Shoe Galosh |
US20170273391A1 (en) * | 2016-03-23 | 2017-09-28 | Fabricio Emmanuelli | Protective shoe cover |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9635900B1 (en) * | 2013-12-06 | 2017-05-02 | Gwendolyn Rolle | Shoe glove |
US20160106179A1 (en) * | 2014-10-16 | 2016-04-21 | Michael Anthony Daye | Shoe Poncho |
USD781537S1 (en) | 2015-03-04 | 2017-03-21 | Mark Ungania | Footwear cover |
US20170265562A1 (en) * | 2016-03-16 | 2017-09-21 | Belinda Mullen | Shoe Galosh |
US20170273391A1 (en) * | 2016-03-23 | 2017-09-28 | Fabricio Emmanuelli | Protective shoe cover |
US10448698B2 (en) * | 2016-03-23 | 2019-10-22 | Fabricio Emmanuelli | Protective shoe cover |
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