WO1996007536A1 - Footwear and the manufacture thereof - Google Patents

Footwear and the manufacture thereof Download PDF

Info

Publication number
WO1996007536A1
WO1996007536A1 PCT/GB1995/002102 GB9502102W WO9607536A1 WO 1996007536 A1 WO1996007536 A1 WO 1996007536A1 GB 9502102 W GB9502102 W GB 9502102W WO 9607536 A1 WO9607536 A1 WO 9607536A1
Authority
WO
WIPO (PCT)
Prior art keywords
cavity
footwear
insole
manufacture
outer sole
Prior art date
Application number
PCT/GB1995/002102
Other languages
French (fr)
Inventor
Harry Howard Gee
Original Assignee
White & Co. (Earls Barton) Limited
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 claimed from GB9418191A external-priority patent/GB9418191D0/en
Priority claimed from GBGB9500724.1A external-priority patent/GB9500724D0/en
Application filed by White & Co. (Earls Barton) Limited filed Critical White & Co. (Earls Barton) Limited
Priority to EP95930646A priority Critical patent/EP0779858B1/en
Priority to US08/809,694 priority patent/US5890248A/en
Priority to DE69503139T priority patent/DE69503139T2/en
Priority to JP8509307A priority patent/JPH10505265A/en
Priority to AU33961/95A priority patent/AU3396195A/en
Publication of WO1996007536A1 publication Critical patent/WO1996007536A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D35/00—Producing footwear
    • B29D35/06—Producing footwear having soles or heels formed and joined on to preformed uppers using a moulding technique, e.g. by injection moulding, pressing and vulcanising
    • B29D35/08—Producing footwear having soles or heels formed and joined on to preformed uppers using a moulding technique, e.g. by injection moulding, pressing and vulcanising having multilayered parts
    • B29D35/081—Producing footwear having soles or heels formed and joined on to preformed uppers using a moulding technique, e.g. by injection moulding, pressing and vulcanising having multilayered parts by injection moulding
    • B29D35/082—Producing footwear having soles or heels formed and joined on to preformed uppers using a moulding technique, e.g. by injection moulding, pressing and vulcanising having multilayered parts by injection moulding injecting first the outer sole part
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B9/00—Footwear characterised by the assembling of the individual parts
    • A43B9/16—Footwear with soles moulded on to uppers or welded on to uppers without adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D35/00—Producing footwear
    • B29D35/10—Producing footwear having preformed soles or heels joined on to preformed uppers using a moulding technique, e.g. by feeding or injecting plastics material between the parts to be joined

Definitions

  • the present invention relates to footwear such as shoes.
  • Some shoe designs have a cavity between the outer sole and the shoe upper which normally contains a piece of synthetic material placed in the cavity during manufacture of the shoe. Whilst providing some cushioning for the wearer, the synthetic piece does not always effectively extend throughout the outer sole such as into the heel portion of the shoe and since it is a discrete piece of material it is not possible to vary the cushioning effect in a range of shoes.
  • the present invention seeks to provide an improved item of footwear and a method of manufacturing such an item of footwear.
  • the present invention provides an item of footwear such as a shoe comprising an outer sole and an upper having an insole, and at least one cavity between the outer sole and insole having inserted therein by injection a resilient material which provides cushioning between the outer sole and insole.
  • the invention also provides a method of manufacture of footwear such as a shoe comprising the assembly of securing an outer sole to an upper to provide at least one empty cavity between said outer sole and an insole of said upper, and subsequent to said assembly, injecting into said at least one cavity a resilient material to provide cushioning between the outer sole and the insole.
  • the material is a synthetic material, preferably a plastics foam.
  • a shoe 10 having a shoe upper 12 of leather or synthetic material secured to a multi-layered sole and heel unit 14.
  • the assembly has an outer sole 16 and a heel 15 of resilient, lightweight synthetic material, an intermediate layer or mid sole 17 which may or may not be integral w h the outer sole 16 and heel 15, and an insole 20.
  • the intermediate layer 17 has a cavity 18 extending the full length of the shoe from the toe portion to the heel portion between the outer sole 16 (or mid sole 17) and the insole 20.
  • a discrete piece or pieces of a resilient material such as a synthetic foam would be inserted into the cavity in order to provide some cushioning effect for the user.
  • the cavity 18 is left empty. Then, once assembly of the shoe has been completed, ie after the outer sole 16 and heel unit 15 is attached to the upper 12, a synthetic foam material 19 is subsequently injected under pressure into the cavity 18 to fill the whole of the cavity from the toe portion to the heel portion of the shoe.
  • the synthetic material is conveniently injected through a small bore 22 which extends through the outer sole 16. Air which is trapped in the cavity 18 is allowed to escape through breather holes 24 and 26 to enable the synthetic material to fully and intimately fill the whole of the cavity.
  • the cavity 18 and foam material 19 are shown extending into a recess 150 in the heel 15 which recess is further shown of extended depth in Figure 2.
  • the shoe is conveniently retained on a last or other support for the insole 20 during injection, the last serving to maintain the desired profile of the insole of the shoe.
  • the pressure injection o ⁇ for example, a reactive, high resilience chemical foam into the cavity 18 is particularly suited to Goodyear welted footwear. It is also suited to other construction methods of manufacture where units (i.e. the combined heel and sole) have a cavity in the fore part waist and heel as shown. Variation of the quantity of synthetic material injected and/or the pressure at which the material is injected allows the cushioning effect of the material to be varied easily, enabling a range of footwear providing different cushioning to be produced. By injecting a synthetic foam material one can ensure that the whole of the cavity 18 is filled by the material to provide a full cushioning effect between the outer sole and the insole.
  • Injection can be effected using, for example, specialist low pressure metering apparatus.
  • a mixture of base resin and hardening agent typically Diphenylmethane 4,4' Di-isocyanate
  • Table I sets out the details of the quantities used to inject five different shoes, all of which provided a noticeable improvement in comfort in the footwear.
  • a foam density of 0.2 - 0.3g/cm is employed.
  • the mix used also resulted in a "skin" forming on the outside of the injected material, this skin restricting water penetration into the body of the foam material.
  • the sole 14 is a single layer sole and the cavity or cavities 18 are formed in the single layer sole.
  • the bore 22 is described as being provided in the outer sole 16, it will be appreciated that the synthetic material can be injected into the cavity at any convenient location, for example through the shoe insole 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

An item of footwear such as a shoe comprises an outer sole (16) which may include an intermediate mid sole (17), an upper (12) having an insole (20) with a cavity (18) between the outer sole (16) or mid sole (17) and insole (20). The cavity (18) receives injected into it cushioning resilient foam material (19) which may extend into a heel portion (15) of or to the outer sole (16) of a multi-layer sole and heel unit (14). In the method of manufacture and after the assembly of the shoe with the empty cavity (18), the resilient material (19) is subsequently injected into the cavity (18) e.g. through a small bore (22) in the outer sole (16) or elsewhere. Vent holes (24, 26) enable air to escape from the cavity (18) to ensure full and intimate filling of the cavity (18) with the foam material (19). The upper (12) may be retained on a last during injection to maintain a desired profile of the insole (20). Quantity and/or pressure of the injected material may be varied for obtaining different degrees of cushioning.

Description

Title: Footwear and the Manufacture thereof
The present invention relates to footwear such as shoes.
Some shoe designs have a cavity between the outer sole and the shoe upper which normally contains a piece of synthetic material placed in the cavity during manufacture of the shoe. Whilst providing some cushioning for the wearer, the synthetic piece does not always effectively extend throughout the outer sole such as into the heel portion of the shoe and since it is a discrete piece of material it is not possible to vary the cushioning effect in a range of shoes.
The present invention seeks to provide an improved item of footwear and a method of manufacturing such an item of footwear.
The present invention provides an item of footwear such as a shoe comprising an outer sole and an upper having an insole, and at least one cavity between the outer sole and insole having inserted therein by injection a resilient material which provides cushioning between the outer sole and insole.
The invention also provides a method of manufacture of footwear such as a shoe comprising the assembly of securing an outer sole to an upper to provide at least one empty cavity between said outer sole and an insole of said upper, and subsequent to said assembly, injecting into said at least one cavity a resilient material to provide cushioning between the outer sole and the insole.
In a preferred form of the invention the material is a synthetic material, preferably a plastics foam.
The present invention is further described hereinafter, by way of example, with reference to the accompanying drawings which are each a longitudinal section through a preferred form of shoe according to the present invention.
Referring to the drawings, there is shown a shoe 10 having a shoe upper 12 of leather or synthetic material secured to a multi-layered sole and heel unit 14. The assembly has an outer sole 16 and a heel 15 of resilient, lightweight synthetic material, an intermediate layer or mid sole 17 which may or may not be integral w h the outer sole 16 and heel 15, and an insole 20. In the illustrated embodiments the intermediate layer 17 has a cavity 18 extending the full length of the shoe from the toe portion to the heel portion between the outer sole 16 (or mid sole 17) and the insole 20. Normally, during manufacture of the shoe a discrete piece or pieces of a resilient material such as a synthetic foam would be inserted into the cavity in order to provide some cushioning effect for the user. However, in the preferred process according to the present invention, during manufacture of the shoe the cavity 18 is left empty. Then, once assembly of the shoe has been completed, ie after the outer sole 16 and heel unit 15 is attached to the upper 12, a synthetic foam material 19 is subsequently injected under pressure into the cavity 18 to fill the whole of the cavity from the toe portion to the heel portion of the shoe. The synthetic material is conveniently injected through a small bore 22 which extends through the outer sole 16. Air which is trapped in the cavity 18 is allowed to escape through breather holes 24 and 26 to enable the synthetic material to fully and intimately fill the whole of the cavity.
The cavity 18 and foam material 19 are shown extending into a recess 150 in the heel 15 which recess is further shown of extended depth in Figure 2.
The shoe is conveniently retained on a last or other support for the insole 20 during injection, the last serving to maintain the desired profile of the insole of the shoe.
The pressure injection oζ for example, a reactive, high resilience chemical foam into the cavity 18 is particularly suited to Goodyear welted footwear. It is also suited to other construction methods of manufacture where units (i.e. the combined heel and sole) have a cavity in the fore part waist and heel as shown. Variation of the quantity of synthetic material injected and/or the pressure at which the material is injected allows the cushioning effect of the material to be varied easily, enabling a range of footwear providing different cushioning to be produced. By injecting a synthetic foam material one can ensure that the whole of the cavity 18 is filled by the material to provide a full cushioning effect between the outer sole and the insole.
Injection can be effected using, for example, specialist low pressure metering apparatus. In trials, a mixture of base resin and hardening agent (typically Diphenylmethane 4,4' Di-isocyanate) at a ratio of 3:1 was injected into the cavity 18 of a shoe at ambient temperature. Table I below sets out the details of the quantities used to inject five different shoes, all of which provided a noticeable improvement in comfort in the footwear. Ideally, a foam density of 0.2 - 0.3g/cm is employed. The mix used also resulted in a "skin" forming on the outside of the injected material, this skin restricting water penetration into the body of the foam material.
TABLE I
Injected Injection
Material Rate Injection
Weight (g) (g sec) Time
60 14.5 4.2
65 14.5 4.5
70 14.5 4.8
75 14.5 5.2
80 14.5 5.5
In a further form of the invention, the sole 14 is a single layer sole and the cavity or cavities 18 are formed in the single layer sole.
Although the bore 22 is described as being provided in the outer sole 16, it will be appreciated that the synthetic material can be injected into the cavity at any convenient location, for example through the shoe insole 20.

Claims

Claims
1. An item of footwear such as a shoe comprising an outer sole and an upper having an insole, and at least one cavity between the outer sole and insole having inserted therein by injection a resilient material which provides cushioning between the outer sole and insole.
2. An hem of footwear according to claim 1 wherein the resilient material is of foam texture.
3. An hem of footwear according to claim 1 or 2 wherein a heel unit or portion of or to the outer sole also receives the injected resilient material between it and the inner sole to provide cushioning between the heel unit or portion and the insole.
4. An item of footwear according to claim 3 wherein the heel unit or portion is internally recessed to receive the injected resilient material between it and the inner sole.
5. An hem of footwear such as a shoe substantially as herein described with reference to the accompanying drawings.
6. Manufacture of footwear such as a shoe comprising :-
(a) the assembly of securing an outer sole to an upper to form at least one empty cavity between said outer sole and an insole of said upper, and
(b) subsequent to said assembly injecting into said at least one cavity a resilient material to provide cushioning between the outer sole and the insole.
7. Manufacture of footwear according to claim 6 wherein the injection of the resihent material into said at least one cavity is such that the resihent material fully and intimately extends throughout the cavity.
8. Manufacture of footwear according to claim 6 or 7 wherein the upper is retained on a last or other support for the insole during injection of the resihent material mto said at least one cavity, the last or other support serving to maintain a desired profile of the insole.
9. Manufacture of footwear according to any of claims 6,7 or 8 wherein the quantity of the resilient material and/or the pressure at which it is injected into the said at least one cavity can be varied for readily providing a desired degree of cushioning eg in providing a range of footwear having different cushioning characteristics.
10. Marαufacture of footwear according to any of claims 6 to 9 wherein the resilient material is of foam texture, or assumes such texture, after injection into the said at least one cavity.
11. Manufacture of footwear according to claim 10 wherein the foam density of the resihent material is of the order of 0.2 to 0.3g/cm.
12. Manufacture of footwear according to claim 10 or 11 wherein the resihent material of foam texture and any hardening agent therewith has the property of forming a skin thereabout after injection into the said at least one cavity, which skin resists water penetration into the body of the foam texture resihent material.
13. Manufacture of footwear according to any of claims 6 to 12 wherein the resihent material is injected into said at least one cavity through any convenient part of the assembly of the footwear such as through a small bore in the outer sole or through the insole.
14. Manufacture of footwear according to any of claims 6 to 13 wherein one or more vent holes are provided to the said at least one cavity through a convenient part of the footwear assembly such as through the outer sole to allow escape of air which would otherwise be trapped in the cavity and so permit full and intimate filling of the latter by the resihent material.
15. Manufacture of footwear according to any of claims 6 to 14 wherein a heel unit or portion of or to the outer sole also receives the resihent material between it and the insole during the injection of said resi ent material.
16. Manufacture of footwear such as a shoe when substantially as herein described with reference to the accompanying drawings.
17. Footwear such as a shoe when manufactured by the method of manufacture according to any of claims 6 to 16.
PCT/GB1995/002102 1994-09-09 1995-09-07 Footwear and the manufacture thereof WO1996007536A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP95930646A EP0779858B1 (en) 1994-09-09 1995-09-07 Footwear and the manufacture thereof
US08/809,694 US5890248A (en) 1994-09-09 1995-09-07 Footwear and the manufacture thereof
DE69503139T DE69503139T2 (en) 1994-09-09 1995-09-07 FOOTWEAR AND THEIR PRODUCTION
JP8509307A JPH10505265A (en) 1994-09-09 1995-09-07 Footwear and manufacturing method thereof
AU33961/95A AU3396195A (en) 1994-09-09 1995-09-07 Footwear and the manufacture thereof

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9418191A GB9418191D0 (en) 1994-09-09 1994-09-09 Shoe
GB9418191.4 1994-09-09
GB9500724.1 1995-01-14
GBGB9500724.1A GB9500724D0 (en) 1995-01-14 1995-01-14 Shoe

Publications (1)

Publication Number Publication Date
WO1996007536A1 true WO1996007536A1 (en) 1996-03-14

Family

ID=26305597

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1995/002102 WO1996007536A1 (en) 1994-09-09 1995-09-07 Footwear and the manufacture thereof

Country Status (7)

Country Link
US (1) US5890248A (en)
EP (1) EP0779858B1 (en)
JP (1) JPH10505265A (en)
AU (1) AU3396195A (en)
DE (1) DE69503139T2 (en)
ES (1) ES2122677T3 (en)
WO (1) WO1996007536A1 (en)

Cited By (3)

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US5893221A (en) * 1997-10-16 1999-04-13 Forest Footwear L.L.C. Footwear having a protuberance
US8127468B2 (en) 2009-06-10 2012-03-06 Wolverine World Wide, Inc. Footwear construction
EP3815892A1 (en) * 2019-10-31 2021-05-05 Louboutin, Christian Two-color shoe outsole and method for manufacturing such outsole

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USD953709S1 (en) 1985-08-29 2022-06-07 Puma SE Shoe
USD855953S1 (en) 2017-09-14 2019-08-13 Puma SE Shoe sole element
DE4436495A1 (en) * 1994-10-12 1996-04-18 Gore W L & Ass Gmbh Process for waterproofing shoes in the sole area
US6026595A (en) * 1997-06-12 2000-02-22 Curry; John M. Method of making form fitted products
US6226895B1 (en) * 1998-06-25 2001-05-08 Wolverine World Wide, Inc. Footwear construction
US6170177B1 (en) * 1998-09-28 2001-01-09 John P. Frappier Footwear customization system and process
EP1243405A1 (en) * 2001-03-21 2002-09-25 Cheng-Hsian Chi Method for making a shoe having a foamed midsole enclosed in the shoe
US6754982B2 (en) * 2001-11-30 2004-06-29 Wolverine World Wide, Inc. Shoe cushioning system and related method of manufacture
EP1398140A1 (en) 2002-09-13 2004-03-17 Cheng-Hsian Chi Method for forming an outsole with an insert on an article of footwear
CN100480030C (en) * 2006-04-13 2009-04-22 天津雪豹鞋业有限公司 Method of manufacturing injection-forming safety shoes with air vent system
US7941938B2 (en) * 2006-05-26 2011-05-17 Nike, Inc. Article of footwear with lightweight sole assembly
US20080148599A1 (en) * 2006-12-21 2008-06-26 Collins Jason H Footwear inserts, including midsoles, sockliners, footbeds and/or upper components using granular ethyl vinyl acetate (EVA) and method of manufacture
US20150282563A1 (en) * 2009-04-15 2015-10-08 Marie Smirman Insert for rockered foot bed of footwear
DE102010052783B4 (en) 2010-11-30 2013-04-04 Puma SE Method of making a shoe and shoe
US9060568B2 (en) 2011-12-02 2015-06-23 Nike, Inc. Article of footwear with insertable lightweight interior midsole structure
GB2509144A (en) * 2012-12-21 2014-06-25 Fflatforms Sarl Multi-layer platform sole for footwear, e.g. platform shoe sole.
DE102015204268A1 (en) * 2015-03-10 2016-09-15 Adidas Ag Soles for sports shoes and their manufacture
MX367652B (en) * 2016-04-29 2019-08-07 Antonio Urtaza Guerra Juan Plastic footwear comprising inner and outer fabric lining, and production method thereof.
USD850766S1 (en) 2017-01-17 2019-06-11 Puma SE Shoe sole element
EP3595478B1 (en) * 2017-03-16 2022-01-12 Nike Innovate C.V. Cushioning member for article of footwear
CN107019288A (en) * 2017-05-22 2017-08-08 李其龙 A kind of three-dimensional balloon body and shoe sole cushion
US10624416B2 (en) 2017-06-01 2020-04-21 Vionic Group LLC Footwear and the manufacture thereof
EP3664656B1 (en) * 2017-08-11 2021-05-19 Puma Se Method for producing a shoe
USD975417S1 (en) 2017-09-14 2023-01-17 Puma SE Shoe
US11832684B2 (en) * 2018-04-27 2023-12-05 Puma SE Shoe, in particular a sports shoe
EP3733014A1 (en) * 2019-04-30 2020-11-04 Ecco Sko A/S An article of footwear
WO2021016166A1 (en) 2019-07-25 2021-01-28 Nike Innovate C.V. Article of footwear
EP4278920A1 (en) 2019-07-25 2023-11-22 NIKE Innovate C.V. Article of footwear
KR20220042413A (en) 2019-07-25 2022-04-05 나이키 이노베이트 씨.브이. cushioning member for footwear
US20220279895A1 (en) * 2019-08-26 2022-09-08 Hewlett-Packard Development Company, L.P. Footwear midsoles with baffles
US11737513B2 (en) * 2019-12-25 2023-08-29 Asics Corporation Shoe and method for manufacturing shoe
TWI725743B (en) * 2020-02-19 2021-04-21 捷欣企業股份有限公司 Ways to customize shoes
USD944504S1 (en) 2020-04-27 2022-03-01 Puma SE Shoe
DE102021210100A1 (en) 2021-09-13 2023-03-16 Adidas Ag Process and device for direct soling

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GB1126535A (en) * 1965-05-05 1968-09-05 Desma Werke Gmbh Improvements in articles of footwear comprising multi-part soles and methods of and apparatus for the manufacture thereof
FR2180244A5 (en) * 1972-04-14 1973-11-23 Rondinaud James Shoe sole mfr - by moulding an expanded sole with a simultaneously bonded wear surface
US3812604A (en) * 1972-08-28 1974-05-28 Nihon Yohin Co Ltd Shoe construction and method of manufacturing a shoe
EP0018663A1 (en) * 1979-05-03 1980-11-12 Brookfield Athletic Shoe Company, Inc. Athletic shoe and process for its manufacture
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GB2255308A (en) * 1991-04-30 1992-11-04 Kloeckner Ferromatik Desma Method and apparatus for moulding soles onto shoe uppers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5893221A (en) * 1997-10-16 1999-04-13 Forest Footwear L.L.C. Footwear having a protuberance
US8127468B2 (en) 2009-06-10 2012-03-06 Wolverine World Wide, Inc. Footwear construction
EP3815892A1 (en) * 2019-10-31 2021-05-05 Louboutin, Christian Two-color shoe outsole and method for manufacturing such outsole
FR3102709A1 (en) * 2019-10-31 2021-05-07 Christian Louboutin Two-tone shoe outsole and method of manufacturing such an outsole

Also Published As

Publication number Publication date
US5890248A (en) 1999-04-06
EP0779858B1 (en) 1998-06-24
EP0779858A1 (en) 1997-06-25
JPH10505265A (en) 1998-05-26
DE69503139T2 (en) 1998-11-05
AU3396195A (en) 1996-03-27
DE69503139D1 (en) 1998-07-30
ES2122677T3 (en) 1998-12-16

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