US3925916A - Foot-fitting insert for ski boot or the like - Google Patents

Foot-fitting insert for ski boot or the like Download PDF

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US3925916A
US3925916A US499406A US49940674A US3925916A US 3925916 A US3925916 A US 3925916A US 499406 A US499406 A US 499406A US 49940674 A US49940674 A US 49940674A US 3925916 A US3925916 A US 3925916A
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insert
skins
core
liner
envelope
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US499406A
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Carlo Garbuio
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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B5/00—Footwear for sporting purposes
    • A43B5/04—Ski or like boots
    • A43B5/0405—Linings, paddings or insertions; Inner boots
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B5/00—Footwear for sporting purposes
    • A43B5/04—Ski or like boots

Definitions

  • a flexible insert for a boot comprises a foot-fitting liner with a core of elastomeric sheet material sandwiched between two skins. At least part of the core is an open-celled foam polymer in an air-impervious envelope, preferably of heat-sealable plastic.
  • My present invention relates to a foot-fitting insert for a ski boot or the like, adapted to be received in the boot as a permanent or removable liner.
  • Liners of this type are especially desirable in the case of integrally molded ski boots which must allow for a certain internal clearance in order to give the foot of the skier the necessary mobility.
  • the inserted liner is thus designed to fill up that clearance without unduly restricting the motion of the foot, serving at the same time as a thermal insulator.
  • Boot liners are known which comprise a sealed envelope filled with a pasty mass, being displaceable inside the envelope to adapt itself to the shape of the foot. Aside from the high cost of such liners, their effectiveness is limited to certain temperature ranges below which the mass tends to harden and above which it becomes excessively liquid. Such liners are therefore not satisfactory for ski boots which are worn both indoors and outdoors so as to be subject to major temperature variations.
  • liners in which the flowable mass has been replaced by air pockets.
  • the air in the pockets tends to yield in the presence of concentrated stress as caused by protrusions on the foot of the user, or possibly on extraneous objects when the insert is to be extracted from the boot to serve as after-ski footwear.
  • a foot-fitting liner from flexible sheet material including an elastomeric core sandwiched between two skins, these skins forming an airirnpervious envelope about at least a part of the core which has a multiplicity of interstices filled with air.
  • This enveloped part consists, pursuant to a further feature of my invention, of an open-celled foam polymer such as, for example, polyurethane.
  • the air-impervious envelope may consist of heatsealable thermoplastic material, either as a self-supporting foil or an an impregnant of a skin-forming fabric layer, to enable all-around closure of the envelope by thermal fusion.
  • FIG. 1 is a longitudinal sectional view of a ski boot lined with an insert according to my invention
  • FIG. 2 is a side-elevational view of the insert of FIG. 1 without the boot;
  • FIG. 1 An integrally molded ski boot 1, FIG. 1, is provided with an insert 2 which may be removable therefrom to serve as an after-ski shoe.
  • Insert 2 is a foot-fitting liner of flexible sheet material with an elastomeric core 4, 4a sandwiched between two skins comprising a pair of fabric layers 3 which may be adhesively bonded thereto.
  • Two major lateral areas A of the insert (one on each side), extending over the region of the ankle, are bounded by a closed seam 7 forming a sealed envelope for the core portion 4a, FIGS. 4 and 5, which consists essentially of an open-celled foam polymer.
  • the envelope is formed by two thermoplastic layers 6, e.g.
  • FIG. 5 shows the fabric layers 3 themselves impregnated with resin, e.g. a polyester, to form the airtight envelope around the open-celled core portion 4a, the seam 7 being here produced by fusion of the impregnants with omission of the plastic layers 6.
  • resin e.g. a polyester
  • a pair of elastic pads 8 may be juxtaposed with the insert 2 in the region of the ankles for additional protection, the material of these pads being substantially denser than that of the core portion 4a.
  • Pads 8 may consist of the same solid (i.e. nonfoamed) elastomeric material as the core portions 4 surrounding the area A, e.g. polyurethane. Any lateral pressure acting upon this pad will be distributed by the resilient core 4a over the entire area A for effective cushioning of the foot without materially impeding its mobility.
  • My improved insert 2 can be produced at greatly reduced cost, compared to the conventional liners referred to above, and can be sealed along the boundary 7 with very little effort. This enables high-rate mass production with conventional equipment.
  • polyurethane has been mentioned as an example of a foamable plastic material of low thermal conductivity and good mechanical stability, both on shelf and in use, other materials in this class can be employed for the same purpose.
  • An insert for a boot comprising a foot-fitting liner of flexible sheet material including an elastomeric core sandwiched between two skins, at least part of said core having a multiplicity of interstices filled with air, said skins including a fabric impregnated with an air-impervious mass to form an airtight envelope about said part.
  • An insert for a boot comprising a foot-fitting liner of flexible sheet material including two juxtaposed skins bonded to each other along a plurality of closed seams encompassing separate areas, and an elastomeric core of open-celled foam polymer sandwiched between said skins in each of said areas, said skins forming an air-impervious envelope about each core whereby air in the cells of each core has limited mobility within the envelope but cannot escape therefrom.

Abstract

A flexible insert for a boot comprises a foot-fitting liner with a core of elastomeric sheet material sandwiched between two skins. At least part of the core is an open-celled foam polymer in an air-impervious envelope, preferably of heat-sealable plastic.

Description

United States Patent [1 1 Garbuio Dec. 16, 1975 FOOT-FITTING INSERT FOR SKI BOOT OR THE LIKE [76] Inventor: Carlo Garbuio, Volpago del Montello, Treviso, Italy [22] Filed: Aug. 22, 1974 [21] Appl. No.: 499,406
[30] Foreign Application Priority Data Oct. 4, 1973 Italy 29732/73 [52] US. Cl. 36/71 [51] Int. Cl. A43B 19/00 [58] Field of Search 36/25 R, 2.5 AL, 71
[56] References Cited UNITED STATES PATENTS Murray 1. 36/71 Nishimura 36/15 AL Rudy 36/15 AL Primary Examiner-Patrick D. Lawson Attorney, Agent, or FirmKarl F. Ross; Herbert Dubno [57] ABSTRACT A flexible insert for a boot comprises a foot-fitting liner with a core of elastomeric sheet material sandwiched between two skins. At least part of the core is an open-celled foam polymer in an air-impervious envelope, preferably of heat-sealable plastic.
9 Claims, 5 Drawing Figures US. Patent Dec. 16,1975 Sheet10f2 3,925,916
RE IN- IMPREGNATED FABRIC U.S. Patent Dec.16, 1975 Sheet20f2 3,925,916
FABRIC FABRIC v am Ill-"In FOOT-FITTING INSERT FOR SKI BOOT OR TI-IE LIKE FIELD OF THE INVENTION My present invention relates to a foot-fitting insert for a ski boot or the like, adapted to be received in the boot as a permanent or removable liner.
BACKGROUND OF THE INVENTION Liners of this type are especially desirable in the case of integrally molded ski boots which must allow for a certain internal clearance in order to give the foot of the skier the necessary mobility. The inserted liner is thus designed to fill up that clearance without unduly restricting the motion of the foot, serving at the same time as a thermal insulator.
Boot liners are known which comprise a sealed envelope filled with a pasty mass, being displaceable inside the envelope to adapt itself to the shape of the foot. Aside from the high cost of such liners, their effectiveness is limited to certain temperature ranges below which the mass tends to harden and above which it becomes excessively liquid. Such liners are therefore not satisfactory for ski boots which are worn both indoors and outdoors so as to be subject to major temperature variations.
Also not fully satisfactory are liners in which the flowable mass has been replaced by air pockets. Although the usefulness of such a boot insert is not substantially affected by changes in temperature, the air in the pockets tends to yield in the presence of concentrated stress as caused by protrusions on the foot of the user, or possibly on extraneous objects when the insert is to be extracted from the boot to serve as after-ski footwear.
OBJECT OF THE INVENTION It is, therefore, the object of my invention to provide an improved insert of this description which avoids the aforestated disadvantages and can be used as either a permanent or an extractable liner for a ski boot.
SUMMARY OF THE INVENTION I realized this object, in accordance with my present invention, by constructing a foot-fitting liner from flexible sheet material including an elastomeric core sandwiched between two skins, these skins forming an airirnpervious envelope about at least a part of the core which has a multiplicity of interstices filled with air. This enveloped part consists, pursuant to a further feature of my invention, of an open-celled foam polymer such as, for example, polyurethane.
The air-impervious envelope may consist of heatsealable thermoplastic material, either as a self-supporting foil or an an impregnant of a skin-forming fabric layer, to enable all-around closure of the envelope by thermal fusion.
BRIEF DESCRIPTION OF THE DRAWING The above and other features of my invention will now be described in detail with reference to the accompanying drawing in which:
FIG. 1 is a longitudinal sectional view of a ski boot lined with an insert according to my invention;
FIG. 2 is a side-elevational view of the insert of FIG. 1 without the boot;
SPECIFIC DESCRIPTION An integrally molded ski boot 1, FIG. 1, is provided with an insert 2 which may be removable therefrom to serve as an after-ski shoe. Insert 2 is a foot-fitting liner of flexible sheet material with an elastomeric core 4, 4a sandwiched between two skins comprising a pair of fabric layers 3 which may be adhesively bonded thereto. Two major lateral areas A of the insert (one on each side), extending over the region of the ankle, are bounded by a closed seam 7 forming a sealed envelope for the core portion 4a, FIGS. 4 and 5, which consists essentially of an open-celled foam polymer. In FIG. 4 the envelope is formed by two thermoplastic layers 6, e.g. of polyethylene, fusion-bonded to each other along the seam 7 and overlain by the fabric layers 3. FIG. 5 shows the fabric layers 3 themselves impregnated with resin, e.g. a polyester, to form the airtight envelope around the open-celled core portion 4a, the seam 7 being here produced by fusion of the impregnants with omission of the plastic layers 6.
As further shown in FIG. 1, a pair of elastic pads 8 (one on each side) may be juxtaposed with the insert 2 in the region of the ankles for additional protection, the material of these pads being substantially denser than that of the core portion 4a. Pads 8 may consist of the same solid (i.e. nonfoamed) elastomeric material as the core portions 4 surrounding the area A, e.g. polyurethane. Any lateral pressure acting upon this pad will be distributed by the resilient core 4a over the entire area A for effective cushioning of the foot without materially impeding its mobility.
Naturally, other areas or possibly the entire insert could be provided with the highly elastic core 4a sealed within an airtight envelope.
Since the air in the interstices of the core 4a cannot migrate freely within the envelope but can shift only to a limited extent, it will not be completely extruded from a region subjected to localized lateral stress so that continued mechanical as well as thermal protection is assured for the entire foot clad with the insert. This insert, accordingly, can also be worn indoors on the foot without the boot 1.
My improved insert 2 can be produced at greatly reduced cost, compared to the conventional liners referred to above, and can be sealed along the boundary 7 with very little effort. This enables high-rate mass production with conventional equipment.
Although polyurethane has been mentioned as an example of a foamable plastic material of low thermal conductivity and good mechanical stability, both on shelf and in use, other materials in this class can be employed for the same purpose.
I claim:
1. An insert for a boot; comprising a foot-fitting liner of flexible sheet material including an elastomeric core sandwiched between two skins, at least part of said core having a multiplicity of interstices filled with air, said skins including a fabric impregnated with an air-impervious mass to form an airtight envelope about said part.
2. An insert as defined in claim 1 wherein said part consists essentially of an open-celled foam polymer.
3. An insert for a boot, comprising a foot-fitting liner of flexible sheet material including two juxtaposed skins bonded to each other along a plurality of closed seams encompassing separate areas, and an elastomeric core of open-celled foam polymer sandwiched between said skins in each of said areas, said skins forming an air-impervious envelope about each core whereby air in the cells of each core has limited mobility within the envelope but cannot escape therefrom.
4. An insert as defined in claim 3, further comprising a solid elastomeric layer sandwiched between said skins in parts of said liner outside said areas.
5. An insert as defined in claim 3, wherein said areas extend along opposite sides of said liner across the region of the ankle.
6. An insert as defined in claim 5, further comprising a resilient pad on said liner overlying a fraction of each area in the region of the ankle.
7. An insert as defined in claim 3 wherein said skins include a fabric.
8. An insert as defined in claim 7 wherein said fabric is impregnated with an impervious mass along said part.
9. An insert as defined in claim 7 wherein said envelope consists of thermoplastic layers overlain by said fabric.

Claims (9)

1. An insert for a boot; comprising a foot-fitting liner of flexible sheet material including an elastomeric core sandwiched between two skins, at least part of said core having a multiplicity of interstices filled with air, said skins including a fabric impregnated with an air-impervious mass to form an airtight envelope about said part.
2. An insert as defined in claim 1 wherein said part consists essentially of an open-celled foam polymer.
3. An insert for a boot, comprising a foot-fitting liner of flexible sheet material including two juxtaposed skins bonded to each other along a plurality of closed seams encompassing separate areas, and an elastomeric core of open-celled foam polymer sandwiched between said skins in each of said areas, said skins forming an air-impervious envelope about each core whereby air in the cells of each core has limited mobility within the envelope but cannot escape therefrom.
4. An insert as defined in claim 3, further comprising a solid elastomeric layer sandwiched between said skins in parts of said liner outside said areas.
5. An insert as defined in claim 3, wherein said areas extend along opposite sides of said liner across the region of the ankle.
6. An insert as defined in claim 5, further comprising a resilient pad on said liner overlying a fraction of each area in the region of the ankle.
7. An insert as defined in claim 3 wherein said skins include a fabric.
8. An insert as defined in claim 7 wherein said fabric is impregnated with an impervious mass along said part.
9. An insert as defined in claim 7 wherein said envelope consists of thermoplastic layers overlain by said fabric.
US499406A 1973-10-04 1974-08-22 Foot-fitting insert for ski boot or the like Expired - Lifetime US3925916A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT29732/73A IT995585B (en) 1973-10-04 1973-10-04 SELF-SHAPING PADDING IN PARTICULAR FOR SKI BOOTS

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US3925916A true US3925916A (en) 1975-12-16

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JP (1) JPS50158452A (en)
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IT (1) IT995585B (en)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4182056A (en) * 1976-08-04 1980-01-08 Engineered Sports Products, Inc. Pliable inner boot and injectable fit packs for ski boots
US4385456A (en) * 1981-03-06 1983-05-31 Jean Livernois Preformed lining component for skate boots and the like
USD280949S (en) 1983-04-01 1985-10-15 Kangaroos U.S.A. Inc. Athletic shoe with padded counter
US4910889A (en) * 1987-11-06 1990-03-27 Salomon, S.A. Ski boot liner
US5149588A (en) * 1988-09-07 1992-09-22 Yamaha Corporation Fitting pad for ski boots
US5253435A (en) * 1989-03-17 1993-10-19 Nike, Inc. Pressure-adjustable shoe bladder assembly
US5257470A (en) * 1989-03-17 1993-11-02 Nike, Inc. Shoe bladder system
US5416988A (en) * 1989-03-17 1995-05-23 Nike, Inc. Customized fit shoe and bladder therefor
US5765298A (en) * 1989-03-17 1998-06-16 Nike, Inc. Athletic shoe with pressurized ankle collar
US5784807A (en) * 1995-09-18 1998-07-28 Pagel; Todd A. Fluid filled support system for footwear
US6044497A (en) * 1998-08-17 2000-04-04 Toasty Toes, L.L.C. Half sock
US20030154627A1 (en) * 2002-02-19 2003-08-21 Shimano Inc. Boot liner
US20040083625A1 (en) * 2002-11-06 2004-05-06 Wilder Thomas V. Contoured skate boot
US6732455B2 (en) * 2000-06-27 2004-05-11 Salomon S.A. Comfort upper for footwear
US20040209061A1 (en) * 2002-07-29 2004-10-21 Brian Farnworth Thermally insulating products for footwear and other apparel
US20060112595A1 (en) * 2004-12-01 2006-06-01 The Timberland Company Removable or reversible lining for footwear
US20060254091A1 (en) * 2005-05-13 2006-11-16 Riecke Edgar E Boot fitting aid for alpine ski boots
US20080000109A1 (en) * 2006-06-28 2008-01-03 Salomon S.A. Footwear having a rigid shell
FR2903174A1 (en) 2006-06-28 2008-01-04 Salomon Sa Shoe e.g. trial running shoe, heating machine for shaping shoe, has blow nozzles placed with respect to each other and arranged from each side of longitudinal direction, and support with hot air generator and passages delimited by edges
US20100287790A1 (en) * 2004-09-03 2010-11-18 Nike, Inc. Article Of Footwear Having An Upper With A Structured Intermediate Layer
US20110119808A1 (en) * 2009-11-25 2011-05-26 Sherman Daryl C Foot stabilizer socks and stabilizer pads therefor
US20120192365A1 (en) * 2011-01-26 2012-08-02 Ottenstein Joseph B Explandable shoe tree for soft shoes
US11445779B2 (en) * 2016-07-21 2022-09-20 Nike, Inc. Article of footwear with multiple layers, retention system for an article of footwear, and methods of manufacture

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0013269A1 (en) * 1978-12-21 1980-07-09 Koflach Sportgeräte Gesellschaft m.b.H Method and apparatus for the manufacture of a padded shoe upper
AT383726B (en) * 1984-09-13 1987-08-10 Koeflach Sportgeraete Gmbh METHOD FOR THE PRODUCTION OF UPHOLSTERY MATERIAL FOR SKI SHOES, ESPECIALLY FOR THE PRODUCTION OF INNER SHOES FOR SKI SHOES
EP0985357B1 (en) * 1998-09-08 2004-12-15 Shimano Inc. Snowboard boot ankle/heel support member
DE102009028471A1 (en) * 2009-08-12 2011-02-17 Svetlana Knezevic Footwear e.g. training shoe, for use during sports training i.e. athletic training, has fluid-tight chamber including leg opening through which chamber is filled with fluid, and extending in vertical direction through external ankle
DE102010026937A1 (en) * 2010-04-07 2011-10-13 Win.Air Sportartikel Gmbh Ski boot, ski and ski binding

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3693270A (en) * 1971-01-08 1972-09-26 Brian L Murray Internal pads for rubber footwear
US3744159A (en) * 1971-03-20 1973-07-10 K Nishimura Sports shoe
US3760056A (en) * 1970-09-23 1973-09-18 Bogert R Method for custom fitting an inflatable bladder to a wearer{3 s foot

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760056A (en) * 1970-09-23 1973-09-18 Bogert R Method for custom fitting an inflatable bladder to a wearer{3 s foot
US3693270A (en) * 1971-01-08 1972-09-26 Brian L Murray Internal pads for rubber footwear
US3744159A (en) * 1971-03-20 1973-07-10 K Nishimura Sports shoe

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4182056A (en) * 1976-08-04 1980-01-08 Engineered Sports Products, Inc. Pliable inner boot and injectable fit packs for ski boots
US4385456A (en) * 1981-03-06 1983-05-31 Jean Livernois Preformed lining component for skate boots and the like
USD280949S (en) 1983-04-01 1985-10-15 Kangaroos U.S.A. Inc. Athletic shoe with padded counter
US4910889A (en) * 1987-11-06 1990-03-27 Salomon, S.A. Ski boot liner
US5149588A (en) * 1988-09-07 1992-09-22 Yamaha Corporation Fitting pad for ski boots
US5257470A (en) * 1989-03-17 1993-11-02 Nike, Inc. Shoe bladder system
US5416988A (en) * 1989-03-17 1995-05-23 Nike, Inc. Customized fit shoe and bladder therefor
US5765298A (en) * 1989-03-17 1998-06-16 Nike, Inc. Athletic shoe with pressurized ankle collar
US5253435A (en) * 1989-03-17 1993-10-19 Nike, Inc. Pressure-adjustable shoe bladder assembly
US5784807A (en) * 1995-09-18 1998-07-28 Pagel; Todd A. Fluid filled support system for footwear
US6044497A (en) * 1998-08-17 2000-04-04 Toasty Toes, L.L.C. Half sock
US6732455B2 (en) * 2000-06-27 2004-05-11 Salomon S.A. Comfort upper for footwear
US20030154627A1 (en) * 2002-02-19 2003-08-21 Shimano Inc. Boot liner
US7752776B2 (en) * 2002-07-29 2010-07-13 Gore Enterprise Holdings, Inc. Thermally insulating products for footwear and other apparel
US20050175799A1 (en) * 2002-07-29 2005-08-11 Brian Farnworth Thermally insulating products for footwear and other apparel
US20040209061A1 (en) * 2002-07-29 2004-10-21 Brian Farnworth Thermally insulating products for footwear and other apparel
US20040083625A1 (en) * 2002-11-06 2004-05-06 Wilder Thomas V. Contoured skate boot
US20060201030A1 (en) * 2002-11-06 2006-09-14 Wilder Thomas V Contoured skate boot
US7676959B2 (en) 2002-11-06 2010-03-16 Mission Itech Hockey, Inc. Contoured skate boot
US8505216B2 (en) 2004-09-03 2013-08-13 Nike, Inc. Article of footwear having an upper with a structured intermediate layer
US8215032B2 (en) * 2004-09-03 2012-07-10 Nike, Inc. Article of footwear having an upper with a structured intermediate layer
US20100287790A1 (en) * 2004-09-03 2010-11-18 Nike, Inc. Article Of Footwear Having An Upper With A Structured Intermediate Layer
US20060112595A1 (en) * 2004-12-01 2006-06-01 The Timberland Company Removable or reversible lining for footwear
US7370438B2 (en) 2004-12-01 2008-05-13 The Timberland Company Removable or reversible lining for footwear
US20060254091A1 (en) * 2005-05-13 2006-11-16 Riecke Edgar E Boot fitting aid for alpine ski boots
FR2903174A1 (en) 2006-06-28 2008-01-04 Salomon Sa Shoe e.g. trial running shoe, heating machine for shaping shoe, has blow nozzles placed with respect to each other and arranged from each side of longitudinal direction, and support with hot air generator and passages delimited by edges
FR2902981A1 (en) 2006-06-28 2008-01-04 Salomon Sa SHOE WITH RIGID SHELL
US20080000109A1 (en) * 2006-06-28 2008-01-03 Salomon S.A. Footwear having a rigid shell
US8893407B2 (en) 2006-06-28 2014-11-25 Salomon S.A.S. Footwear having a rigid shell
US20110119808A1 (en) * 2009-11-25 2011-05-26 Sherman Daryl C Foot stabilizer socks and stabilizer pads therefor
US8856968B2 (en) * 2009-11-25 2014-10-14 PTX Performance Products, Inc. Foot stabilizer socks and stabilizer pads therefor
US20120192365A1 (en) * 2011-01-26 2012-08-02 Ottenstein Joseph B Explandable shoe tree for soft shoes
US11445779B2 (en) * 2016-07-21 2022-09-20 Nike, Inc. Article of footwear with multiple layers, retention system for an article of footwear, and methods of manufacture

Also Published As

Publication number Publication date
DE2400861C3 (en) 1978-09-07
DE2400861B2 (en) 1976-12-02
DE2400861A1 (en) 1975-04-24
JPS50158452A (en) 1975-12-22
IT995585B (en) 1975-11-20

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