GB2088776A - Understructure members for footwear - Google Patents

Understructure members for footwear Download PDF

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Publication number
GB2088776A
GB2088776A GB8136749A GB8136749A GB2088776A GB 2088776 A GB2088776 A GB 2088776A GB 8136749 A GB8136749 A GB 8136749A GB 8136749 A GB8136749 A GB 8136749A GB 2088776 A GB2088776 A GB 2088776A
Authority
GB
United Kingdom
Prior art keywords
material
layer
method according
footwear
well
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.)
Pending
Application number
GB8136749A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SEAMARKS ROBERT JAMES
Original Assignee
SEAMARKS ROBERT JAMES
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to GB8039098 priority Critical
Application filed by SEAMARKS ROBERT JAMES filed Critical SEAMARKS ROBERT JAMES
Priority to GB8136749A priority patent/GB2088776A/en
Publication of GB2088776A publication Critical patent/GB2088776A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02Physical, chemical or physicochemical properties
    • AHUMAN NECESSITIES
    • A43FOOTWEAR
    • A43BCHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B17/00Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined
    • A43B17/14Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined made of sponge, rubber, or plastic materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/12Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00Composition of foam
    • B32B2266/02Organic
    • B32B2266/0214Materials belonging to B32B27/00
    • B32B2266/0221Vinyl resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00Composition of foam
    • B32B2266/02Organic
    • B32B2266/0214Materials belonging to B32B27/00
    • B32B2266/025Polyolefin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00Composition of foam
    • B32B2266/02Organic
    • B32B2266/0214Materials belonging to B32B27/00
    • B32B2266/0278Polyurethane
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2437/00Clothing
    • B32B2437/02Gloves, shoes

Abstract

An understructure member such as an insock or insole for an article of footwear is made by bonding a first elastomeric material having low compression set and delayed recovery after distortion to fill at least one well formed by permanent depression of a selected area within a layer of a second elastomeric material having a high compression set. The first material preferably accords with Patent Specification No. 1,564,195, and the second material is suitably of foamed thermoplastic form such as a cross-linked polyethylene, polyurethane or vinyl acetate co-polymer capable of ready permanent depression by a heated mould. The first material can be separately moulded or cut to shape and then bonded with adhesive in the well, or moulded in-situ.

Description

SPECIFICATION Understructure members for footwear This invention concerns understructure members for footwear and more particularly such members as insocks and insoles including shock absorbing elements.

It has been proposed that use be made of elastomeric materials of the kind described in Patent Specification No. 1,564,195 to provide shock absorbing capability in footwear.

Such materials are presently thought to be uniquely suited to this purpose by virtue of their low compression set and delayed recovery after distortion. Low compression set is clearly relevant to a shock absorbent material for use in an article of footwear because the article will normally be subjected to a great number of impacts during locomotion on the part of the wearer; indeed the compression set should ideally approach zero. Delayed recovery after distortion is relevant to avoidance of any significant return of absorbed impact energy until after the load on the foot, of which the shock is the onset, has been distributed, the recovery preferably being completed before a further shock occurs during locomotion.

It is to be noted that elastomeric materials having appropriate compression set conventional have too high an elastic modulus.

However while the first materials above may be uniquely suited to providing shock absorbency in footwear, they are not readily suited to simple techniques for incorporating the same into articles of footwear such as are applicable to conventional elastomeric materials. In general terms the former materials are unstable in handling properties. This is best appreciated by the fact that the materials were conceived with a view to providing mechanical properties similar to those of human tissue and, in the result, have handling properties similar thereto. Such properties are particularly difficult in the context of incorporation in articles of footwear in a variable manner to provide shock absorbing properties in selected areas, as compared to use of a uniform overall layer.

Also, insofar as it is possible that other elastomeric materials having similar low compression set and delayed recovery properties may be developed, such materials are likely to have similar handling properties and, in consequence, be subject to similar difficulties in incorporation into footwear.

An object of the present invention is to ameliorate these difficulties and to this end provides a method of fabricating an understructure member for an article of footwear, which method comprises bonding a first elastomeric material substantially to fill at least one well formed by permanent depression of a selected area within a layer of a second elastomeric material, said first material having a low compression set and delayed recovery after distortion, and said second material having a high compression set compared to said first material.

Preferably the second material is of foamed thermoplastic form, such as a cross-linked polyethylene, polyurethane or a vinyl acetate ethylene copolymer, capable of ready permanent depression by use of a heated mould.

In one form of the above method the first material is separately prepared as a layer of predetermined shape for bonding in a layer of the second material prepared with a well of corresponding shape. This form of method is appropriate to the large scale production of insocks for general use in footwear. The predetermined shape of the first material can be provided by separately moulding the relevant layer, or by cutting the same from a sheet or strip, and thereafter bonding the same into its well. Separate moulding is suited to situations where the first material is to be employed not as a simple homogeneous layer but with variations such as air pockets, within its own structure. Cutting is, of course, suited to employment of the first material in the form of a homogeneous layer.

In another form of the above method the first material is prepared to a required shape by moulding the same directly in said well.

Such moulding may bond the first material in situ, or the first material can be separately bonded. This form of method is appropriate to a situation where special location of the first material is required for an individual user of the resultant insole. Such situations will commonly arise in connection with pedal abnormalities of a temporary or permanent nature, a particular configuration of shock absorbing capability being prescribed for an individual foot.

The invention will be further understood by consideration of presently contemplated embodiments thereof described below with reference to the accompanying drawings in which Figures 1 and 2 schematically illustrate in underneath plan view and an enlarged sectional view at I-I thereof, one insock embodiment of the invention; and Figure 3 and 4 similarly respectively illustrate, with sectional view at ll-ll, another such embodiment.

The insock of Figs. 1 and 2 comprises three layers 10, 11 and 1 2 of respectively different materials.

The lowermost layer 10 is of substantially uniform thickness and of a material of the above-mentioned kind of Specification No.

1,564,195. This layer is separately moulded and, during moulding, is formed with an array of slot-shaped cavities 1 3 opening into the layer from below, with each cavity being vented into the upper surface of the layer by small passageways 14. Such cavities form air pockets in the overall insock, which cavities vary the shock absorbing properties in a controlled manner compared to the use of a homogeneous form for the layer 10.

The middle layer 11 is of a closed-cell foamed cross-linked polyethylene. This layer is initially of a uniform thickness and has an overall plan shape corresponding to that of a shoe, but with a convex extension in the medial instep region whereby the layer is readily located in a shoe, after or during construction, with the extension curving upwardly in the relevant instep region. During fabrication, this layer is formed by use of a suitable heated mould, with a permanent depression of corresponding shape to the layer 10, this mould having projections to punch holes through the compressed material of the layer 11 in positions corresponding to those of the passageways 14. After this moulding the layer 10 is secured in the depression of layer 11, conveniently by use of a neoprene adhesive. It will normally be appropriate to degrease the layer 10 for the purposes of such bonding.

The remaining upper layer 1 2 is of synthetic velour or other suitable finishing fabric.

This fabric is conveniently secured by flame welding or other appropriate technique to the layer 11 prior to depression moulding of the latter, and enhances the confort and appearance of the insock.

In the result the insock of Figs. 1 and 2 is readily handled as a unit for location in a shoe to locate, in turn, the layer 10 of shock absorbing material in a substantially predeter mined location relative to user's foot in the shoe. During use, those parts of the layer 11 laterally surrounding the layer 10 quickly permanently compress to conform to the foot under the user's weight while leaving the layer 10 to provide the desired shock absorb ing function over the relevant selected areas below the foot. The regions where the layer 11 laterally abuts the layer 10 are found to compress in a flared manner such that no pronounced edge effect or associated discomfort is likely to arise. However, this can be ensured by appropriate complementary flaring of the edges of layer 10 and the depression in layer 11 during moulding.It will, in any case, be understood that the embodiment of Figs. 1 and 2 is given only by way of example and variations are possible in overall geometry as to the plan shapes and thicknesses of the layers 10 and 11, and the form and distribution of cavities and passageways in layer 11.

The embodiment of Figs. 3 and 4 is similar in general terms to that just described in comprising lower, middle and upper layers 20, 21 and 22 of corresponding materials.

However, in this case the shock absorbing layer 20 and its depression in layer 21 are determined in relation to the special require ments of an individual, such requirements being commonly determined by a medical practitioner in relation to an abnormal pedal condition. In these circumstances the required depressed area or areas are effectively mapped by the practitioner, whereafter one or more corresponding mould members of wood or other suitable material is formed to represent the areas, heated in a microwave oven or other manner, and appropriately pressed on a blank form of the layer 21 having a layer 22 already secured thereto. In this connection a suitable mould member material is readily available, economic, readily formable to required shaped, non-combustable at an appropriate moulding temperature, and non-reactant in any undesired manner with the layer 21.After formation of the depressed areas, material can be moulded in situ therein to define the layer 20 and will bond sufficiently when curing to allow subsequent handling for location of the insock structure in a shoe.

In the event that cavities and vent passageways are required, suitable mould members denoted in broken outline at 23 can be located in the depressed areas before casting of layer 20, these members having projections 24 to pierce the layers 21 and 22, the members being removable after curing of the cast material.

While the illustrated embodiments are insocks suited to separable location in a shoe following fabrication of the shoe, such an insock can be secured by bonding or stitching following or during fabrication to integrate the same with the shoe. Also, while specific reference has been made to insocks for exemplification of the invention, application of the invention can be made to insoles or other members in the understructure.

Claims (12)

1. A method of fabricating an understructure member for an article of footwear which method comprises bonding a first elastomeric material substantially to fill at least one well formed by permanent depression of a selected area within a layer of a second elastomeric material, said first material having a low compression set and delayed recovery after distortion, and said second material having a high compression set compared to said first material.
2. A method according to Claim 1 wherein said first material is separately prepared as a layer of predetermined shape corresponding to that of said well for subsequent bonding therein.
3. A method according to Claim 2 wherein the layer of said first material is separately prepared by cutting from a sheet or strip thereof.
4. A method according to Claim 2 wherein the layer of said first material is separately prepared by moulding.
5. A method nccordiri61 to Claim 2, 3, or 4 wherein the layer of said first material is bonded in said well with adhesive.
6. A method according to Claim 1 wherein said first material is shaped to fill said well by in-situ moulding therein.
7. A method according to any preceding claim wherein said first material is of the kind mentioned hereinbefore, and said second material is of foamed thermoplastic form capable of ready permanent depression by use of a heated mould member.
8. A method according to Claim 7 wherein said second material is a cross-linked polyethylene, polyurethane or vinyl acetate copolymer.
9. A method according to Claim 5 and Claim 7 wherein said adhesive is of neoprene form.
1 0. An understructure member, for or in an article of footwear, made by a method according to any preceding claim.
11. A member according to Claim 10 wherein said second material layer is covered with a synthetic velour or other finishing fabric over the side thereof remote from said first material.
12. A member according to Claim 10 or 11 wherein said first material layer is formed with air pockets therein.
GB8136749A 1980-12-05 1981-12-07 Understructure members for footwear Pending GB2088776A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB8039098 1980-12-05
GB8136749A GB2088776A (en) 1980-12-05 1981-12-07 Understructure members for footwear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8136749A GB2088776A (en) 1980-12-05 1981-12-07 Understructure members for footwear

Publications (1)

Publication Number Publication Date
GB2088776A true GB2088776A (en) 1982-06-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB8136749A Pending GB2088776A (en) 1980-12-05 1981-12-07 Understructure members for footwear

Country Status (1)

Country Link
GB (1) GB2088776A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4910886A (en) * 1983-02-28 1990-03-27 Sullivan James B Shock-absorbing innersole
US5787610A (en) 1996-05-29 1998-08-04 Jeffrey S. Brooks, Inc. Footwear
US8166674B2 (en) 2009-08-03 2012-05-01 Hbn Shoe, Llc Footwear sole
US9003679B2 (en) 2008-08-06 2015-04-14 Nike, Inc. Customization of inner sole board
US10390587B2 (en) 2016-03-01 2019-08-27 Hbn Shoe, Llc Device for high-heeled shoes and method of constructing a high-heeled shoe
US10477915B2 (en) 2016-03-01 2019-11-19 Hbn Shoe, Llc Device for high-heeled shoes and method of constructing a high-heeled shoe

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4910886A (en) * 1983-02-28 1990-03-27 Sullivan James B Shock-absorbing innersole
US5787610A (en) 1996-05-29 1998-08-04 Jeffrey S. Brooks, Inc. Footwear
US5964046A (en) * 1996-05-29 1999-10-12 Jeffrey S. Brooks, Inc. Footwear
US9003679B2 (en) 2008-08-06 2015-04-14 Nike, Inc. Customization of inner sole board
US9808046B2 (en) 2008-08-06 2017-11-07 Nike, Inc. Customization of inner sole board
US9844242B2 (en) 2008-08-06 2017-12-19 Nike, Inc. Customization of inner sole board
US8166674B2 (en) 2009-08-03 2012-05-01 Hbn Shoe, Llc Footwear sole
US10390587B2 (en) 2016-03-01 2019-08-27 Hbn Shoe, Llc Device for high-heeled shoes and method of constructing a high-heeled shoe
US10477915B2 (en) 2016-03-01 2019-11-19 Hbn Shoe, Llc Device for high-heeled shoes and method of constructing a high-heeled shoe

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