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US3641688A - Shoe molded by induction heating - Google Patents

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Publication number
US3641688A
US3641688A US3641688DA US3641688A US 3641688 A US3641688 A US 3641688A US 3641688D A US3641688D A US 3641688DA US 3641688 A US3641688 A US 3641688A
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material
shoe
electromagnetic
energy
layer
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Elizabeth Von Den Benken
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ELIZABETH VON DEN BENKEN
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ELIZABETH VON DEN BENKEN
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    • AHUMAN NECESSITIES
    • A43FOOTWEAR
    • A43BCHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00Soles; Sole and heel units
    • A43B13/38Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process
    • AHUMAN NECESSITIES
    • A43FOOTWEAR
    • A43BCHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B7/00Footwear with health or hygienic arrangements
    • A43B7/14Footwear with foot-supporting parts
    • A43B7/28Adapting the inner sole or the side of the upper of the shoe to the sole of the foot

Abstract

The invention concerns a shoe whose bottom has a layer of thermoplastic material in it and which has embodied in its bottom electromagnetic energy absorbing material which can be heated by alternating magnetic flux, thus activating the layer of thermoplastic material which then can be molded according to the contour of a human foot.

Description

United States Patent von den Benken [54] SIIOE MOLDED BY INDUCTION HEATING [72] Inventor: Elizabeth von den Benken, 2212 Centre St., West Roxbury, Mass. 02132 [22] Filed: Dec. 10, 1969 [21] Appl.No.: 883,952

[52] US. Cl ..36/43, 36/25 AL [51] Int. Cl. ..A43b 13/38 [58] Field of Search ..36/2.5 R, 2.5 AL, 43; 12/142 [56] References Cited UNITED STATES PATENTS 6/1965 Radcliffe et a1 ..36/43 1 1 Feb. 15, 1972 Greene ..12/ 142 R 3,493,986 2/1970 Erwin 2,860,416 11/1958 Pfund ..36/43 X 3,407,406 10/1968 Werner et al... ...36/2.5 AL 3,521,385 7/1970 Dalebout ..36/2.5 AL

Primary Examiner-Patrick D. Lawson [57] ABSTRACT The invention concerns a shoe whose bottom has a layer of thermoplastic material in it and which has embodied in its bottom electromagnetic energy absorbing material which can be heated by alternating magnetic flux, thus activating the layer of thermoplastic material which then can be molded according to the contour of a human foot.

8 Claims, 3 Drawing Figures PATENTEBFEB 15 m2 3.61.688

INVENTOR. Elisabefh von den Benken BACKGROUND OF THE INVENTION This invention relates to footwear of any kind, as boots, sandals, shoes, etc. However, henceforth the word shoe will be used only. Human feet vary in length, width and contour. There is even a difference between the left and the right foot of the same person, due to gait and walking habits. In a shoe factory, the shoes are made over lasts which are to represent human feet. These lasts take into consideration the various lengths and widths, but as to the contour of a foot, they are a compromise only.

In the past, when shoes were handmade and leather was the only material used, they could be fitted to the overall contour of each individual foot. Moreover, a leather shoe has the outstanding feature of gradually shaping itself to the contour of a human foot. The advantages of handmade leather shoes have been lost to a great extent in present-day mass production. In particular, leather is replaced by synthetic material which does not possess the feature of shaping itself to the contour of a human foot. For this reason, it is hard to break in new shoes made of synthetic material.

SUMMARY OF THE INVENTION It is the main objective of this invention to provide a finished shoe whose bottom can be quickly molded according to the bottom contour of a human foot at any time after the shoe has left the factory. This does not only eliminate the long break-in time and the disadvantages of mass-produced shoes, but also can be of particular importance for people who have crippled or abnormal feet.

Shoes, according to the invention, have a layer of thermoplastic material which in many cases will be the insole. In the bottom of the shoe, close to the layer of thermoplastic material, is embodied electromagnetic energy absorbing material such as small parts of steel, aluminum, copper, graphite, etc. These parts can be heated by exposure to an alternating magnetic flux. This method of heating is known as induction heating. Induction heating machines are commercially available, and they will be referred to in conjunction with this invention only. When the thermoplastic material is activated, and a person lets the weight of his body rest on the bottom of the shoe, the imprint of the foot will be in the shoe in less than a minute.

DESCRIPTION OF THE DRAWINGS DESCRIPTION OF THE PREFERRED EMBODIMENT In FIG. 1 is shown a cement-lasted shoe. However, it should be understood that this invention is applicable to any kind of shoe construction. The insole 8 is made of thermoplastic material, for instance thermoplastic foam made of polyethylene, polypropylene, polyvinyl cloride, etc. Adjacent to the insole 8 are located electromagnetic energy absorbing discs 4 which are shown somewhat enlarged for the sake of illustration. The electromagnetic energy absorbing discs can be made of any conducting material such as steel, copper, aluminum, graphite, etc. Also, the shape of the material 4 is functionally unimportant. Furthermore, the location of the electromagnetic energy absorbing material 4 in the bottom of the shoe might vary with each type of shoe. For instance, it could very well be part of the tiller material 6. In

some cases it mi ht be attached to the putsole 6. The upger l0 and its lining 1 are made of a material which can wit stand the activation temperature of the thermoplastic insole 8.

In FIG. 2 is shown a thermoplastic insole 8 which has been activated and molded according to the contours of the toes of the foot F.

In FIG. 3, the foot F with shoe rests on the coils 14 of an induction heating machine. In this illustration, the thermoplastic insole 8 is shown prior to activation and molding. Shoes which have been made with electromagnetic energy absorbing material 4 located in an appropriate bottom area according to the construction of the shoe, are shipped to a retail store as usual.

A retail store has to be equipped with an induction heating machine (not shown in the drawing). After a customer has selected a pair of shoes she puts them on and stands on the coils 14 of an induction heating machine. When the induction heating machine is turned on, an alternating electromagnetic field surrounds the coils l4 and transfers part of its energy to the electromagnetic energy absorbing material 4. In the material 4 the electromagnetic energy is changed into heat. Then, this heat activates the thermoplastic insole 8 or a similar layer of plastic material in the bottom of the shoe. Under the weight of the body, the activated thermoplastic insole 8 will mold according to the contour of the bottom of the customers foot. Of course, the activation temperature of the thermoplastic material is such that the foot does not suffer from burns. Also, the frequencies of an induction heating machine are not in any way dangerous to human health.

The construction of the shoe, the kind of thermoplastic material, and the shape and kind of electromagnetic energy absorbing material will necessitate various embodiments without departing from the character of the invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

l. A shoe of any make having located in its bottom area electromagnetic energy absorbing particles and a layer of moldable material which can be heat activated by said electromagnetic energy absorbing particles when the shoe is exposed to the alternating electromagnetic field of an induction heating machine.

2. A shoe of any make according to claim I in which the electromagnetic energy absorbing particles and the layer of moldable material are integral parts of factory-finished shoes.

3. A shoe of any make according to claim I in which the layer of moldable material can be softened to such a degree as to receive the imprint of a human foot.

4. A shoe of any make according to claim I in which the layer of moldable material consists of one or several thin sheets of plastic material.

5. A shoe of any make according to claim 1 in which the electromagnetic energy absorbing particles consist of electrically conductive material which is arranged in the shoe bottom in such a manner as to uniformly heat activate the layer of moldable material when the shoe bottom is to receive the imprint of a human foot.

6. A shoe of any make according to claim 1 in which the electromagnetic energy absorbing particles and the layer of moldable material are combined with the shoe insole.

7. A shoe of any make according to claim I in which the electromagnetic energy absorbing particles and the layer of moldable material are already combined with the sheet out of which the shoe soles are to be cut.

8. A shoe of any make according to claim 1 in which the layer of moldable material consists of plastic foam.

Claims (8)

1. A shoe of any make having located in its bottom area electromagnetic energy absorbing particles and a layer of moldable material which can be heat activated by said electromagnetic energy absorbing particles when the shoe is exposed to the alternating electromagnetic field of an induction heating machine.
2. A shoe of any make according to claim 1 in which the electromagnetic energy absorbing particles and the layer of moldable material are integral parts of factory-finished shoes.
3. A shoe of any make according to claim 1 in which the layer of moldable material can be softened to such a degree as to receive the imprint of a human foot.
4. A shoe of any make according to claim 1 in which the layer of moldable material consists of one or several thin sheets of plastic material.
5. A shoe of any make according to claim 1 in which the electromagnetic energy absorbing particles consist of electrically conductive material which is arranged in the shoe bottom in such a manner as to uniformly heat activate the layer of moldable material when the shoe bottom is to receive the imprint of a human foot.
6. A shoe of any make according to claim 1 in which the electromagnetic energy absorbing particles and the layer of moldable material are combined with the shoe insole.
7. A shoe of any make according to claim 1 in which the electromagnetic energy absorbing partiCles and the layer of moldable material are already combined with the sheet out of which the shoe soles are to be cut.
8. A shoe of any make according to claim 1 in which the layer of moldable material consists of plastic foam.
US3641688A 1969-12-10 1969-12-10 Shoe molded by induction heating Expired - Lifetime US3641688A (en)

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Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968577A (en) * 1974-11-18 1976-07-13 Lynn Wolstenholme Jackson Method and construction of footwear incorporating a customized, form fitted casting unit
US4128951A (en) * 1975-05-07 1978-12-12 Falk Construction, Inc. Custom-formed insert
US4224750A (en) * 1975-05-16 1980-09-30 Delport Marthienes J Foot-wear
EP0118319A2 (en) * 1983-03-08 1984-09-12 John Drew (London) Limited Production of insoles
WO1985003624A1 (en) * 1984-02-18 1985-08-29 Keltsch, Bernhard Method for fabricating shoe inner soles with adapted form
US4866860A (en) * 1988-07-25 1989-09-19 Wolverine World Wide, Inc. Metatarsal head shoe cushion construction
US5150490A (en) * 1988-01-25 1992-09-29 Storopack Hans Reichenecker Gmbh & Co. Process for producing a resilient or padded insert for footwear
WO1992021257A1 (en) * 1991-05-31 1992-12-10 Davidson Murray R Foot cushioning device
WO1994009666A1 (en) * 1992-11-05 1994-05-11 Polymer Innovations, Inc. Custom-fitting articles
US5327663A (en) * 1993-03-18 1994-07-12 Pryce Michael L Supination control sole and shoe
WO1997022273A1 (en) * 1995-12-20 1997-06-26 Nike International Ltd. Footwear fitting system
US5673448A (en) * 1992-11-04 1997-10-07 Intuition Sports Incorporated Sport boot liner and method for making same
WO1997041750A1 (en) * 1996-05-08 1997-11-13 Daley Peter A Method and apparatus for heating thermoformable material in footwear
EP0824874A2 (en) * 1996-08-09 1998-02-25 Fancyform Design Engineering Innerboot, in particular for skibooth or mountainboots
US5733647A (en) * 1992-11-05 1998-03-31 Polymer Innovations, Inc. Insole
WO1998014082A1 (en) * 1996-10-01 1998-04-09 Perfect Impression Footwear Company Custom-fitting footwear
US5785909A (en) * 1996-08-21 1998-07-28 Nike, Inc. Method of making footwear with a pourable foam
US5797862A (en) * 1994-11-21 1998-08-25 Lamont; William D. Medical boot for patient with diabetic foot
US5885500A (en) * 1995-12-20 1999-03-23 Nike, Inc. Method of making an article of footwear
GB2317811B (en) * 1995-09-05 2000-11-01 Testoni A Spa Footwear having a thermoformable insole
US6263592B1 (en) * 1999-06-28 2001-07-24 Yi-Hsi Chen Footwear pad
US6346210B1 (en) 1997-02-14 2002-02-12 The Rockport Company, Llc Method of shaping susceptor-based polymeric materials
US6703142B2 (en) 2000-06-02 2004-03-09 The Rockport Company, Llc Moldable article, method of making and composition for making moldable articles
US20040194348A1 (en) * 2003-04-07 2004-10-07 Campbell Todd D Heat malleable orthotic shoe insert
US20090019725A1 (en) * 2007-07-20 2009-01-22 Ching-Hung Wang Electromagnetic fitness shoes with a conductor structure and insoles
US20100175277A1 (en) * 2009-01-13 2010-07-15 Elizabeth Langvin Sole with Adjustable Sizing
US8512269B1 (en) 2010-03-09 2013-08-20 William Scott Stano Molded ankle-foot orthoses and methods of construction
US20140000044A1 (en) * 2012-06-29 2014-01-02 Nike, Inc. Induction Heating Apparatuses And Processes For Footwear Manufacturing
US8840825B2 (en) 2008-01-10 2014-09-23 JD & SW, LLC, (Nevada LLC) Moldable thermoplastic inserts
US20160242489A1 (en) * 2015-02-20 2016-08-25 LaNena Bennett Shoe Assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2860416A (en) * 1952-01-24 1958-11-18 Joseph E Rusz Seated impression fitting aids
US3186113A (en) * 1962-08-30 1965-06-01 United Shoe Machinery Corp Attachment of shoe insoles to lasts
US3221353A (en) * 1961-07-31 1965-12-07 Franklin R Greene Methods of shoe manufacture using a radio frequency dielectric heater
US3407406A (en) * 1965-06-14 1968-10-29 Rosemount Eng Co Ltd Conformable pad and material for use therein
US3493986A (en) * 1968-01-22 1970-02-10 Charles W Erwin Heat producing device
US3521385A (en) * 1968-05-02 1970-07-21 Melvin W Dalebout Ski boot

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2860416A (en) * 1952-01-24 1958-11-18 Joseph E Rusz Seated impression fitting aids
US3221353A (en) * 1961-07-31 1965-12-07 Franklin R Greene Methods of shoe manufacture using a radio frequency dielectric heater
US3186113A (en) * 1962-08-30 1965-06-01 United Shoe Machinery Corp Attachment of shoe insoles to lasts
US3407406A (en) * 1965-06-14 1968-10-29 Rosemount Eng Co Ltd Conformable pad and material for use therein
US3493986A (en) * 1968-01-22 1970-02-10 Charles W Erwin Heat producing device
US3521385A (en) * 1968-05-02 1970-07-21 Melvin W Dalebout Ski boot

Cited By (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968577A (en) * 1974-11-18 1976-07-13 Lynn Wolstenholme Jackson Method and construction of footwear incorporating a customized, form fitted casting unit
US4128951A (en) * 1975-05-07 1978-12-12 Falk Construction, Inc. Custom-formed insert
US4224750A (en) * 1975-05-16 1980-09-30 Delport Marthienes J Foot-wear
EP0118319A2 (en) * 1983-03-08 1984-09-12 John Drew (London) Limited Production of insoles
EP0118319A3 (en) * 1983-03-08 1985-09-18 John Drew (London) Limited Production of insoles
WO1985003624A1 (en) * 1984-02-18 1985-08-29 Keltsch, Bernhard Method for fabricating shoe inner soles with adapted form
EP0154170A1 (en) * 1984-02-18 1985-09-11 Keltsch, Bernhard Method of producing shoe insoles having an exact fit
US5150490A (en) * 1988-01-25 1992-09-29 Storopack Hans Reichenecker Gmbh & Co. Process for producing a resilient or padded insert for footwear
US4866860A (en) * 1988-07-25 1989-09-19 Wolverine World Wide, Inc. Metatarsal head shoe cushion construction
WO1992021257A1 (en) * 1991-05-31 1992-12-10 Davidson Murray R Foot cushioning device
US5172494A (en) * 1991-05-31 1992-12-22 Davidson Murray R Foot cushioning device
US5673448A (en) * 1992-11-04 1997-10-07 Intuition Sports Incorporated Sport boot liner and method for making same
WO1994009666A1 (en) * 1992-11-05 1994-05-11 Polymer Innovations, Inc. Custom-fitting articles
US5733647A (en) * 1992-11-05 1998-03-31 Polymer Innovations, Inc. Insole
US5555584A (en) * 1992-11-05 1996-09-17 Polymer Innovations, Inc. Method of producing custom-fitting articles and composition for the use therewith
US5327663A (en) * 1993-03-18 1994-07-12 Pryce Michael L Supination control sole and shoe
US5797862A (en) * 1994-11-21 1998-08-25 Lamont; William D. Medical boot for patient with diabetic foot
GB2317811B (en) * 1995-09-05 2000-11-01 Testoni A Spa Footwear having a thermoformable insole
WO1997022273A1 (en) * 1995-12-20 1997-06-26 Nike International Ltd. Footwear fitting system
US5714098A (en) * 1995-12-20 1998-02-03 Nike, Inc. Footwear fitting method
US5879725A (en) * 1995-12-20 1999-03-09 Nike, Inc. Footwear fitting system
US5885500A (en) * 1995-12-20 1999-03-23 Nike, Inc. Method of making an article of footwear
US5885622A (en) * 1996-05-08 1999-03-23 Daley; Pete Method and apparatus for heating thermoformable material in footwear
WO1997041750A1 (en) * 1996-05-08 1997-11-13 Daley Peter A Method and apparatus for heating thermoformable material in footwear
EP0824874A2 (en) * 1996-08-09 1998-02-25 Fancyform Design Engineering Innerboot, in particular for skibooth or mountainboots
US6003248A (en) * 1996-08-09 1999-12-21 Fancyform Design Engineering Heatable liner for footwear
EP0824874A3 (en) * 1996-08-09 1999-01-13 Fancyform Design Engineering Innerboot, in particular for skibooth or mountainboots
US5785909A (en) * 1996-08-21 1998-07-28 Nike, Inc. Method of making footwear with a pourable foam
US5829171A (en) * 1996-10-01 1998-11-03 Perfect Impression Footwear Company Custom-fitting footwear
WO1998014082A1 (en) * 1996-10-01 1998-04-09 Perfect Impression Footwear Company Custom-fitting footwear
US6346210B1 (en) 1997-02-14 2002-02-12 The Rockport Company, Llc Method of shaping susceptor-based polymeric materials
US6812271B2 (en) 1997-02-14 2004-11-02 The Rockport Company, Llc Susceptor-based polymeric materials
US6263592B1 (en) * 1999-06-28 2001-07-24 Yi-Hsi Chen Footwear pad
US6703142B2 (en) 2000-06-02 2004-03-09 The Rockport Company, Llc Moldable article, method of making and composition for making moldable articles
US20040166352A1 (en) * 2000-06-02 2004-08-26 Rebecca Snow Moldable article, method of making and composition for making moldable articles
US20060159944A1 (en) * 2000-06-02 2006-07-20 Rebecca Snow Moldable article, method of making and composition for making moldable articles
US7029749B2 (en) 2000-06-02 2006-04-18 Rebecca Snow Moldable article, method of making and composition for making moldable articles
US20040194348A1 (en) * 2003-04-07 2004-10-07 Campbell Todd D Heat malleable orthotic shoe insert
US20090019725A1 (en) * 2007-07-20 2009-01-22 Ching-Hung Wang Electromagnetic fitness shoes with a conductor structure and insoles
US7913428B2 (en) * 2007-07-20 2011-03-29 Ching-Hung Wang Electromagnetic fitness shoes with a conductor structure
US8840825B2 (en) 2008-01-10 2014-09-23 JD & SW, LLC, (Nevada LLC) Moldable thermoplastic inserts
US8166592B2 (en) * 2009-01-13 2012-05-01 Nike, Inc. Sole with adjustable sizing
US20100175277A1 (en) * 2009-01-13 2010-07-15 Elizabeth Langvin Sole with Adjustable Sizing
US8561322B2 (en) 2009-01-13 2013-10-22 Nike, Inc. Sole with adjustable sizing
US9301571B2 (en) 2009-01-13 2016-04-05 Nike, Inc. Sole with adjustable sizing
US9179731B2 (en) 2009-01-13 2015-11-10 Nike, Inc. Sole with adjustable sizing
US8512269B1 (en) 2010-03-09 2013-08-20 William Scott Stano Molded ankle-foot orthoses and methods of construction
US9591892B2 (en) 2012-06-29 2017-03-14 Nike, Inc. Induction heating apparatuses and processes for footwear manufacturing
US8959690B2 (en) * 2012-06-29 2015-02-24 Nike, Inc. Induction heating apparatuses and processes for footwear manufacturing
US20140000044A1 (en) * 2012-06-29 2014-01-02 Nike, Inc. Induction Heating Apparatuses And Processes For Footwear Manufacturing
CN104411199B (en) * 2012-06-29 2016-06-08 耐克创新有限合伙公司 The induction heating apparatus and process for manufacturing footwear
CN105996294A (en) * 2012-06-29 2016-10-12 耐克创新有限合伙公司 Induction heating apparatuses and processes for footwear manufacturing
CN104411199A (en) * 2012-06-29 2015-03-11 耐克创新有限合伙公司 Induction heating apparatuses and processes for footwear manufacturing
US20160242489A1 (en) * 2015-02-20 2016-08-25 LaNena Bennett Shoe Assembly

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