CA2092550A1 - Method for manufacturing moulded footwear in different widths - Google Patents
Method for manufacturing moulded footwear in different widthsInfo
- Publication number
- CA2092550A1 CA2092550A1 CA002092550A CA2092550A CA2092550A1 CA 2092550 A1 CA2092550 A1 CA 2092550A1 CA 002092550 A CA002092550 A CA 002092550A CA 2092550 A CA2092550 A CA 2092550A CA 2092550 A1 CA2092550 A1 CA 2092550A1
- Authority
- CA
- Canada
- Prior art keywords
- footwear
- sole
- moulded
- lower portion
- boot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
- A43B7/28—Adapting the inner sole or the side of the upper of the shoe to the sole of the foot
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
The present invention relates to a method for manufacturing moulded footwear to a desired width, the method comprising the steps of moulding the structure of a footwear having an upper portion, a lower portion and a sole with a thermoplastic material; of providing the sole of the footwear with a weakened area so as to allow some lateral displacement of the lower portion and finally, of forcing the lower portion of said footwear over a width adjusting means to adjust the lower portion of the moulded footwear to said desired width.
Description
W092t~07 2 0 ~ 2 ~ 5 0 PCT/CA~/~360 METHOD FOR MANUFACTURING MOULDED FOOTWEAR
IN DIFFERENT WIDTHS
~
The present invention relates to a method for manufacturing moulded footwear in di~ferent widths.
DESCRIPTIQN OF PRIOR ART
Skate and boot widths are handled differently in different markets. In the ski and moulded skate market, boots are made with a larger or average width. In the ski industry, many devices are available to accommodate the fit of a boot to feet of different widths such as screw adjusted devices.
However, in the hockey industry, width is ad~usted only through different thicknesses of an inside liner. Thus, the segment of the population most affected with respect to performance are those people possessing narrow feet since a plurality of layers of liner must be added to the footwear.
~5 U~ S a patent no. 4,353,173 (Paquet) is an illustration of insoles for sXate boots. In this particular embodiment, the insole is secured to a conventional last and the boot upper is finally mounted to same~ -For the stitched boot, different widths are signified bythe ~ollowing symbols: B-C-D~E-EE. To be able to produce these dif~erent widths, a last deæign must be i~corporated into the manufacturing process. This design allows dif~erent widths by stitching together pieces of material of dif~erent lengths over the last. ~his produces what we call the "upper".
SUBSTITUTE SHEET
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W~2/~07 PCT/~
IN DIFFERENT WIDTHS
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The present invention relates to a method for manufacturing moulded footwear in di~ferent widths.
DESCRIPTIQN OF PRIOR ART
Skate and boot widths are handled differently in different markets. In the ski and moulded skate market, boots are made with a larger or average width. In the ski industry, many devices are available to accommodate the fit of a boot to feet of different widths such as screw adjusted devices.
However, in the hockey industry, width is ad~usted only through different thicknesses of an inside liner. Thus, the segment of the population most affected with respect to performance are those people possessing narrow feet since a plurality of layers of liner must be added to the footwear.
~5 U~ S a patent no. 4,353,173 (Paquet) is an illustration of insoles for sXate boots. In this particular embodiment, the insole is secured to a conventional last and the boot upper is finally mounted to same~ -For the stitched boot, different widths are signified bythe ~ollowing symbols: B-C-D~E-EE. To be able to produce these dif~erent widths, a last deæign must be i~corporated into the manufacturing process. This design allows dif~erent widths by stitching together pieces of material of dif~erent lengths over the last. ~his produces what we call the "upper".
SUBSTITUTE SHEET
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W~2/~07 PCT/~
2 0~ æ~o 2 One example of method available is found in U.S. patent no.
3,613,271 (Geller), in which it is shown a method to reshape a preformed molded ~oot to an individual's foot.
Despite the fact that this type of method provides adequate fittings, it has certain drawbacks. The main drawback is that, since the temperature required to soften the thermoplastic material is kept relatively low for obvious reasons, the reshaped boot has the tendency to take back its initial shape. Furthermore, this method is time consuming and is thus not easily available on a large basis.
SUMMARY OF THE PRESENT INVENTION
The presen~ invention relates to a method of manufacturing moulded skate and ski boots having different widths.
The process in accordance to the present invention is the manufacture of a thermoplastic moulded footwear (upper?
made using the injection moulding method. The upper is made in one piece with the bottom por~ion having a flange all around and a transverse strap or the like joining the flanges. The idea is to provide the upper and more particularly, the lower portion of same with a waakened area so as to help the thermoforming, therefore a sole with a thin section can be used. The material used is of a thermoplastic elastomer type, which has a specific elasticity and, most importantly, has a thermoforming capability.
The thermoforming process consists of heating the thermoplastic material forming~the upper to an optimal point of ~alleability and then cooling it once it has taken on the desired shape.
SUBSTITUTE SHEET
W092~07 2 ~ 9 2 ~ 5 ~ PCT/CA~/~360 Based on this thermoforming process, a boot with a semi open sole (upper) is placed in an oven until the desired malleability is reached. The upper is then slipped onto a metal form (last) possessing the dimensions and width desired. In cooling, the upper takes on the shape of the metal form and, at demoulding, the boot (upper) will have the desired width.
A method for manufacturing moulded footwear having a lower portion and a sole portion to a desired width, said footwear having a sole portion, said method comprising the following steps:
- moulding the structure of said footwear with a thermoplastic material;
- providing said sole portion with a weakened area so as to allow lateral movement of the said lower portion;
- forcing the lower portion of said footwear over a width adj~sting means so as to conform the lower portion of said moulded footwear to the width of said adjusting means;
- attaching a ~inishing sole to said sole portion.
O~JECTS O~ THE PRESE~T INVENTION
It is an object of the present invention to provide a method which will allow the adjustmant of a moulded boot to a desired width before the sole i5 attached thereto.
Another object of the present invention is to provide a moulded boot which will not have the drawbacks of prior art.
, . . . . . .
~, W092~07 PCT/CA~/~3 2~?~55 ~ 4 Still an~ther object of the present invention is to provide such a method to adjust to width of a moulded boot, which is economical to use.
Yet another object of the present invention is to provide a method which can easily be adapted to large scale manufacturing.
DESCRIPTION OF DRAWINGS
The foregoing and other ob~ects, charactPristics and advantages of the present invention will be more clearly understood from the following detailed description thereof when read in conjunction with the accompanying drawings, in which:
Figures 1 to 7 show the manu~acturing process in accordance with a first embodim~nt of the present invention.
Figures 8 to 11 show the manufacturing method in accordance with a second embodiment of the present invention.
Figures 12 to 14 show the manufacturing method in accordance with a third embodiment of the present invention.
Figure 15 shows examples of the final products.
DESCRIPTION OF A PREFE~RED E~BO~
The present invention will be described by means of three (3) embodiments.
SUBSTITUTE SHEET
5.3' u WO 92/06607 PCr/CA90/~360 FIRST EMBODIMENT
With reference to figures 1 to 8, thP basic elements of the first embodiment are: an already moulded boot 10 (made according to a conventional manufacturing process), an insole 15, also already moulded or die cut to the desired width by conventional manufacturing processes and finally, a last diagrammatically indicated hy reference numeral 20.
More precisely, the moulded boot 10 is provided with a thinned inner area 25 as shown in figure 2 to receive the insole 15 as it will be described hereinafter. The moulded boot 10 is preferably made in one piece and with a thermoplastic material of the elastomeric type which has a speci~ic elasticity and, most importantly, a thermoforming capability.
The insole 15 may also be made of a thermoplastic material.
The sole section 30, the front section 35 and the heel section 40 of the insole 15 are designed to define a specific front and heel width. Such insoles of varying widths are much less costly to produce than corresponding boot uppers.
As shown in figure 3, the bottom portion 42 of the moulded boot is provided with a "weakened area" 45 so as ~o allow lateral movement as it is necessary in accordance to the present invention and as it will be appreciated hereina~ter. In this embodiment, the weakened area 45 comprises two openings 50a and 50b separated by a flange 55. The openings 50a and 50b, and the flange 55 are obtained during the manufacturing process of the moulded boot.
It is to be understood that the purpose of the weakened area is to allow movement of the lower portion of the moulded boot 10 so as to adjust the width of same, SUBSTITUTE SHEET
, - . , W092/~7 PC~/CA9~/~3 a~ a5 Q 6 therefore any other type of means can be used for the same result. For example, the bottom portion 42 c~n be provided with more than two openings and alternatively, the bottom portion 42 may comprise a thinner walled sçction.
~s shown in figure 5, the first step of the manufacturing process is to position the preformed insole 15 and the moulded boot 10 over the last 20. Then, the moulded boot 10 is stretched to fit snugly over the insole.
With re~erence to figure 6, a side lasting machine tnot shown) is used to push the moulded boot 10 against the last 20 to shape the contour and at the same time, nails 60 or other equivalent fixation means are provided on the lS periphery of the bottom portion 42 of the moulded boot 10.
Finally, a finishing sole 65 is affixed to the bottom portion 42 of the moulded boot. Thermo-glue (not shown) is applied on the bottom portion, preferably said glue should be applied to both surfaces. Thereafter, the glue is reactivated under heat and the boot 10 and the finishing sole 65 are press~d together.
The process described above is mainly used to adjust the moulded boot to a width larger than what has been originally moulded since the boot 10 and the insole 15 are stretched over the last 20. However, the two other methods described her~inafter are used to adjust the moulded boot to a width smaller that what has been originally moulded.
SECOND EMBODIMENT
Now, with reference to figures B to 11, the second embodiment of the manufacturing method is shown, wherein 10 is the pre~oulded boot and 70 represents ~hs thin walled bottom or sole portion. In this particular embodiment, SUBSTITUTE SllEET
.
W092/~07 ~ U~ 2 5 5 ~ PCTtCA~/~360 since a negative pressure is applied to formfit the bGot as it will be appreciated hereinafter, the openings 50a and 50b of the first embodiment are not adequate.
The second embodiment uses the following elements, that is the moulded boot 10 and a last 75 provided with a plurality o~ vacuum holes 80 connected to a channel 85 and to a vacuum pump (not shown).
The first step of this second embodiment, as shown in figure 8, is to place the moulded boot 10 over the last 75.
The combination moulded boot and the last (lasted boot) (Figure 9a) is heated to soften the lower portion 8~ of the boot. This heating can be done, for example, by placing the lasted boot in an oven 76 such that only the bottom and the sid~s of the boot 86 are heated (Figure 9b, cross section). Subsequent to heating, pressure, by means of a vacuum pump (not shown) connected to 85, is applied so as ko force the hot thermoplastic of the lower portion 86 to take the con~iguration of the last 75 (Figure 10).
To reinforce the boot 10, a finishing sole 65 is affixed to the boot by using the same method as previously described in the first embodiment (Figure 11).
THIRD EMBODIMENT
Finally, the last manufacturing method hereinafter described is also useful and is considered the preferred embodiment of the present invention. For this third method, illustrated in ~igures 12 to 14, different metal lasts, generally referxed as number 90, each having a speci~ic width are used with a mould 95. The moulded boot 10 used for this embodiment is identical to the one used for the first embodiment, that is, provided with a weakened area such as openings 50a and 50b or having other openings.
SLJBSTITUTE SHEET
-. .. .. .:
, W092/~07 PCT/~A90/~03~
e ~oulded boot 10 is placed over the last 90 in a snugly-~it fashion (lasted boot) and the lasted boot 100 is placed with its sole surface facing downwards in order to be positioned in a sole mould 95 as shown in figures 13 and 14 tcross section).
The basic elements of the footwear sole mould 95 are a cavity structure 105, the latter essentially consisting of a bottom plate 110 and a pair of complementary side plates 115 and 120. The side plates 115 and 120 are arranged for horizontal reciprocal movement toward and away from each other, as indicated by the arrow B. The bottom plate 110 and the last 90 is arranged for vertical reciprocal movement, as indicated by the arrow C. The inwardly directed surface 125 of the side plates 115 and 120 are contoured so as to define, when the latter is in thP
illustrated positions thereof, the side walls of a ~avity 130, the dimensions, width and shape of which are those of the moulded boot to be obtained. Suitable heating means (not shown) are preferably provided in or in association with the cavity structure 130 and~or the last 90. It is important to mention that the heating of the footwear 10 should be limited to the lower portion 135 of said moulded boot 10.
When the lasted boot is well positioned in the mould 35, heat is applied to the mould 95 or as mentioned above, heat can be applied to the last 90, in its lower portion thereof, the last and/or the mould are usually made of metal to permit the best heat transmission. Depending of the nature of the thermoplastic material of the footwear, a specific heating time is chosen tc obtain an optimal point of ~alleability. When this point is achieved, the mould 95 and the las~-90 will dictate the width of the boot and once said boot has taken the desired shape, plastic is injected therein to form the sole of the boot. The mould is then cooled and the boot demoulded. Throughout this SUB~TITUCrE SHEET
W092/~07 2 ~ ~ ~ 5 5 ~ PC~CA~/~360 thermoforming proc~ss, the molecular structure of the elastomeric material is altered under heat but sets up at the room temperature. Figure 15 shows examples of the finished products 140 and 145.
It should be understood that various modifications, changes and variations may be made in the arrangements, operations and details of construction of the elements disclosed herein without departing from the spirit and scope of this lQ invention. ~hus, although the invention has so far been described as applying to the skate boot industry, the principles herein disclosed are applicable as well to the manufacturing process of such items as ski boots or other moulded footwear.
SUBSTITUTE SHEET
:, , , WOg2/~7 PCT/C~/~3~
2o~255a 10 LIST OF ~hE~
10 Moulded footwear 75 Last with vacuum holes 15 Insole 80 Vacuum holes 20 Last 85 Channel 10 25 Thinner sole 86 Lower portion of the 30 Sole section moulded boot 35 Front section 90 Metal last 40 Heel section 95 Mould 42 Bottom portion of the 100 Lasted footwear moulded boot 105 Cavity structure 45 Weakened area 110 Bottom plate 50a ~ 50b Openings 115 Side plate 55 Flange 120 Side plate 60 Nails 125 Inwardly surface 20 65 Finishing sole 130 Cavity 70 Thin sole 135 Lower portion 75 Last with vacuum holes 140 Finished product 76 oven j 1~5 Finished product 80 Vacuum holes SUBSTITUTE SHEET
.
, .
~, .
Despite the fact that this type of method provides adequate fittings, it has certain drawbacks. The main drawback is that, since the temperature required to soften the thermoplastic material is kept relatively low for obvious reasons, the reshaped boot has the tendency to take back its initial shape. Furthermore, this method is time consuming and is thus not easily available on a large basis.
SUMMARY OF THE PRESENT INVENTION
The presen~ invention relates to a method of manufacturing moulded skate and ski boots having different widths.
The process in accordance to the present invention is the manufacture of a thermoplastic moulded footwear (upper?
made using the injection moulding method. The upper is made in one piece with the bottom por~ion having a flange all around and a transverse strap or the like joining the flanges. The idea is to provide the upper and more particularly, the lower portion of same with a waakened area so as to help the thermoforming, therefore a sole with a thin section can be used. The material used is of a thermoplastic elastomer type, which has a specific elasticity and, most importantly, has a thermoforming capability.
The thermoforming process consists of heating the thermoplastic material forming~the upper to an optimal point of ~alleability and then cooling it once it has taken on the desired shape.
SUBSTITUTE SHEET
W092~07 2 ~ 9 2 ~ 5 ~ PCT/CA~/~360 Based on this thermoforming process, a boot with a semi open sole (upper) is placed in an oven until the desired malleability is reached. The upper is then slipped onto a metal form (last) possessing the dimensions and width desired. In cooling, the upper takes on the shape of the metal form and, at demoulding, the boot (upper) will have the desired width.
A method for manufacturing moulded footwear having a lower portion and a sole portion to a desired width, said footwear having a sole portion, said method comprising the following steps:
- moulding the structure of said footwear with a thermoplastic material;
- providing said sole portion with a weakened area so as to allow lateral movement of the said lower portion;
- forcing the lower portion of said footwear over a width adj~sting means so as to conform the lower portion of said moulded footwear to the width of said adjusting means;
- attaching a ~inishing sole to said sole portion.
O~JECTS O~ THE PRESE~T INVENTION
It is an object of the present invention to provide a method which will allow the adjustmant of a moulded boot to a desired width before the sole i5 attached thereto.
Another object of the present invention is to provide a moulded boot which will not have the drawbacks of prior art.
, . . . . . .
~, W092~07 PCT/CA~/~3 2~?~55 ~ 4 Still an~ther object of the present invention is to provide such a method to adjust to width of a moulded boot, which is economical to use.
Yet another object of the present invention is to provide a method which can easily be adapted to large scale manufacturing.
DESCRIPTION OF DRAWINGS
The foregoing and other ob~ects, charactPristics and advantages of the present invention will be more clearly understood from the following detailed description thereof when read in conjunction with the accompanying drawings, in which:
Figures 1 to 7 show the manu~acturing process in accordance with a first embodim~nt of the present invention.
Figures 8 to 11 show the manufacturing method in accordance with a second embodiment of the present invention.
Figures 12 to 14 show the manufacturing method in accordance with a third embodiment of the present invention.
Figure 15 shows examples of the final products.
DESCRIPTION OF A PREFE~RED E~BO~
The present invention will be described by means of three (3) embodiments.
SUBSTITUTE SHEET
5.3' u WO 92/06607 PCr/CA90/~360 FIRST EMBODIMENT
With reference to figures 1 to 8, thP basic elements of the first embodiment are: an already moulded boot 10 (made according to a conventional manufacturing process), an insole 15, also already moulded or die cut to the desired width by conventional manufacturing processes and finally, a last diagrammatically indicated hy reference numeral 20.
More precisely, the moulded boot 10 is provided with a thinned inner area 25 as shown in figure 2 to receive the insole 15 as it will be described hereinafter. The moulded boot 10 is preferably made in one piece and with a thermoplastic material of the elastomeric type which has a speci~ic elasticity and, most importantly, a thermoforming capability.
The insole 15 may also be made of a thermoplastic material.
The sole section 30, the front section 35 and the heel section 40 of the insole 15 are designed to define a specific front and heel width. Such insoles of varying widths are much less costly to produce than corresponding boot uppers.
As shown in figure 3, the bottom portion 42 of the moulded boot is provided with a "weakened area" 45 so as ~o allow lateral movement as it is necessary in accordance to the present invention and as it will be appreciated hereina~ter. In this embodiment, the weakened area 45 comprises two openings 50a and 50b separated by a flange 55. The openings 50a and 50b, and the flange 55 are obtained during the manufacturing process of the moulded boot.
It is to be understood that the purpose of the weakened area is to allow movement of the lower portion of the moulded boot 10 so as to adjust the width of same, SUBSTITUTE SHEET
, - . , W092/~7 PC~/CA9~/~3 a~ a5 Q 6 therefore any other type of means can be used for the same result. For example, the bottom portion 42 c~n be provided with more than two openings and alternatively, the bottom portion 42 may comprise a thinner walled sçction.
~s shown in figure 5, the first step of the manufacturing process is to position the preformed insole 15 and the moulded boot 10 over the last 20. Then, the moulded boot 10 is stretched to fit snugly over the insole.
With re~erence to figure 6, a side lasting machine tnot shown) is used to push the moulded boot 10 against the last 20 to shape the contour and at the same time, nails 60 or other equivalent fixation means are provided on the lS periphery of the bottom portion 42 of the moulded boot 10.
Finally, a finishing sole 65 is affixed to the bottom portion 42 of the moulded boot. Thermo-glue (not shown) is applied on the bottom portion, preferably said glue should be applied to both surfaces. Thereafter, the glue is reactivated under heat and the boot 10 and the finishing sole 65 are press~d together.
The process described above is mainly used to adjust the moulded boot to a width larger than what has been originally moulded since the boot 10 and the insole 15 are stretched over the last 20. However, the two other methods described her~inafter are used to adjust the moulded boot to a width smaller that what has been originally moulded.
SECOND EMBODIMENT
Now, with reference to figures B to 11, the second embodiment of the manufacturing method is shown, wherein 10 is the pre~oulded boot and 70 represents ~hs thin walled bottom or sole portion. In this particular embodiment, SUBSTITUTE SllEET
.
W092/~07 ~ U~ 2 5 5 ~ PCTtCA~/~360 since a negative pressure is applied to formfit the bGot as it will be appreciated hereinafter, the openings 50a and 50b of the first embodiment are not adequate.
The second embodiment uses the following elements, that is the moulded boot 10 and a last 75 provided with a plurality o~ vacuum holes 80 connected to a channel 85 and to a vacuum pump (not shown).
The first step of this second embodiment, as shown in figure 8, is to place the moulded boot 10 over the last 75.
The combination moulded boot and the last (lasted boot) (Figure 9a) is heated to soften the lower portion 8~ of the boot. This heating can be done, for example, by placing the lasted boot in an oven 76 such that only the bottom and the sid~s of the boot 86 are heated (Figure 9b, cross section). Subsequent to heating, pressure, by means of a vacuum pump (not shown) connected to 85, is applied so as ko force the hot thermoplastic of the lower portion 86 to take the con~iguration of the last 75 (Figure 10).
To reinforce the boot 10, a finishing sole 65 is affixed to the boot by using the same method as previously described in the first embodiment (Figure 11).
THIRD EMBODIMENT
Finally, the last manufacturing method hereinafter described is also useful and is considered the preferred embodiment of the present invention. For this third method, illustrated in ~igures 12 to 14, different metal lasts, generally referxed as number 90, each having a speci~ic width are used with a mould 95. The moulded boot 10 used for this embodiment is identical to the one used for the first embodiment, that is, provided with a weakened area such as openings 50a and 50b or having other openings.
SLJBSTITUTE SHEET
-. .. .. .:
, W092/~07 PCT/~A90/~03~
e ~oulded boot 10 is placed over the last 90 in a snugly-~it fashion (lasted boot) and the lasted boot 100 is placed with its sole surface facing downwards in order to be positioned in a sole mould 95 as shown in figures 13 and 14 tcross section).
The basic elements of the footwear sole mould 95 are a cavity structure 105, the latter essentially consisting of a bottom plate 110 and a pair of complementary side plates 115 and 120. The side plates 115 and 120 are arranged for horizontal reciprocal movement toward and away from each other, as indicated by the arrow B. The bottom plate 110 and the last 90 is arranged for vertical reciprocal movement, as indicated by the arrow C. The inwardly directed surface 125 of the side plates 115 and 120 are contoured so as to define, when the latter is in thP
illustrated positions thereof, the side walls of a ~avity 130, the dimensions, width and shape of which are those of the moulded boot to be obtained. Suitable heating means (not shown) are preferably provided in or in association with the cavity structure 130 and~or the last 90. It is important to mention that the heating of the footwear 10 should be limited to the lower portion 135 of said moulded boot 10.
When the lasted boot is well positioned in the mould 35, heat is applied to the mould 95 or as mentioned above, heat can be applied to the last 90, in its lower portion thereof, the last and/or the mould are usually made of metal to permit the best heat transmission. Depending of the nature of the thermoplastic material of the footwear, a specific heating time is chosen tc obtain an optimal point of ~alleability. When this point is achieved, the mould 95 and the las~-90 will dictate the width of the boot and once said boot has taken the desired shape, plastic is injected therein to form the sole of the boot. The mould is then cooled and the boot demoulded. Throughout this SUB~TITUCrE SHEET
W092/~07 2 ~ ~ ~ 5 5 ~ PC~CA~/~360 thermoforming proc~ss, the molecular structure of the elastomeric material is altered under heat but sets up at the room temperature. Figure 15 shows examples of the finished products 140 and 145.
It should be understood that various modifications, changes and variations may be made in the arrangements, operations and details of construction of the elements disclosed herein without departing from the spirit and scope of this lQ invention. ~hus, although the invention has so far been described as applying to the skate boot industry, the principles herein disclosed are applicable as well to the manufacturing process of such items as ski boots or other moulded footwear.
SUBSTITUTE SHEET
:, , , WOg2/~7 PCT/C~/~3~
2o~255a 10 LIST OF ~hE~
10 Moulded footwear 75 Last with vacuum holes 15 Insole 80 Vacuum holes 20 Last 85 Channel 10 25 Thinner sole 86 Lower portion of the 30 Sole section moulded boot 35 Front section 90 Metal last 40 Heel section 95 Mould 42 Bottom portion of the 100 Lasted footwear moulded boot 105 Cavity structure 45 Weakened area 110 Bottom plate 50a ~ 50b Openings 115 Side plate 55 Flange 120 Side plate 60 Nails 125 Inwardly surface 20 65 Finishing sole 130 Cavity 70 Thin sole 135 Lower portion 75 Last with vacuum holes 140 Finished product 76 oven j 1~5 Finished product 80 Vacuum holes SUBSTITUTE SHEET
.
, .
~, .
Claims (8)
1. A method for manufacturing moulded footwear having a lower portion and a sole portion to a desired width, said footwear having a sole portion, said method comprising the following steps:
- moulding the structure of said footwear with a thermoplastic material;
- providing said sole portion with a weakened area so as to allow lateral movement of the said lower portion;
- forcing the lower portion of said footwear over a width adjusting means so as to conform the lower portion of said moulded footwear to the width of said adjusting means;
- attaching a finishing sole to said sole portion.
- moulding the structure of said footwear with a thermoplastic material;
- providing said sole portion with a weakened area so as to allow lateral movement of the said lower portion;
- forcing the lower portion of said footwear over a width adjusting means so as to conform the lower portion of said moulded footwear to the width of said adjusting means;
- attaching a finishing sole to said sole portion.
2. A method as described in claim 1, further comprising the step of applying sufficient heat to said sole portion of said footwear to allow the thermoplastic material to become moldable.
3. A method according to claim 2, wherein the width adjusting means comprises a la t.
4. A method according to claim 3, wherein the weakened axea of the moulded footwear comprises a thin sole and said last is provided with a plurality of vacuum holes and the method further comprises the following steps:
- applying a negative pressure to said last 50 as to conform the heated lower portion to the shape of said last;
- cooling of the heated lower portion.
- applying a negative pressure to said last 50 as to conform the heated lower portion to the shape of said last;
- cooling of the heated lower portion.
5. A method for manufacturing moulded footwear to a desired width, said footwear having a lower portion and a sole portion, said method comprising the following steps:
- moulding the structure of said footwear with a thermoplastic material;
- providing said sole portion with a weakened area so as to allow lateral movement to the said lower portion;
- inserting a last having the desired width into said moulded footwear;
- placing the combination of the last and the footwear into a mould wherein the lower portion of the footwear is heated so as to force said footwear to reach the desired width;
- injecting a thermoplastic into the mould to form a finishing sole;
- cooling of the heated lower portion and finishing sole.
- moulding the structure of said footwear with a thermoplastic material;
- providing said sole portion with a weakened area so as to allow lateral movement to the said lower portion;
- inserting a last having the desired width into said moulded footwear;
- placing the combination of the last and the footwear into a mould wherein the lower portion of the footwear is heated so as to force said footwear to reach the desired width;
- injecting a thermoplastic into the mould to form a finishing sole;
- cooling of the heated lower portion and finishing sole.
6. A moulded footwear made in accordance with the method described in claims 1, 2 or 3.
7. A moulded footwear made in accordance with the method described in claims 1, 2 or 3, which is a skate boot.
8. A moulded footwear made in accordance with the method described in claims 1, 2 or 3, which is a ski boot.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002092550A CA2092550A1 (en) | 1990-10-19 | 1990-10-19 | Method for manufacturing moulded footwear in different widths |
| EP90915275A EP0553071B1 (en) | 1990-10-19 | 1990-10-19 | Method for manufacturing moulded footwear in different widths |
| DE69018485T DE69018485T2 (en) | 1990-10-19 | 1990-10-19 | PROCESS FOR MANUFACTURING MOLDED FOOTWEAR IN DIFFERENT WIDTHS. |
| PCT/CA1990/000360 WO1992006607A1 (en) | 1990-10-19 | 1990-10-19 | Method for manufacturing moulded footwear in different widths |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002092550A CA2092550A1 (en) | 1990-10-19 | 1990-10-19 | Method for manufacturing moulded footwear in different widths |
| PCT/CA1990/000360 WO1992006607A1 (en) | 1990-10-19 | 1990-10-19 | Method for manufacturing moulded footwear in different widths |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2092550A1 true CA2092550A1 (en) | 1992-04-20 |
Family
ID=4172863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002092550A Abandoned CA2092550A1 (en) | 1990-10-19 | 1990-10-19 | Method for manufacturing moulded footwear in different widths |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0553071B1 (en) |
| CA (1) | CA2092550A1 (en) |
| DE (1) | DE69018485T2 (en) |
| FI (1) | FI931669A (en) |
| WO (1) | WO1992006607A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1273915B (en) * | 1994-10-27 | 1997-07-11 | Nordica Spa | INTERNAL SHOE FOR SPORT SHOES AND PROCEDURE FOR OBTAINING THE SAME. |
| US5714098A (en) * | 1995-12-20 | 1998-02-03 | Nike, Inc. | Footwear fitting method |
| AU2003292092A1 (en) | 2003-11-24 | 2005-06-24 | Tyrolia Technology Gmbh | Skis and ski boots combination |
| ITUD20070021A1 (en) | 2007-02-02 | 2008-08-03 | Calzaturificio Dal Bello S R L | SERIES OF SPORTS SHOES, SUCH AS SKI, SNOWBOARD OR SIMILAR BOOTS, OF DIFFERENT SIZES, COMBINATION BETWEEN TWO OR MORE SERIES AND ITS RELATED PROCEDURE |
| DE102017223737A1 (en) * | 2017-12-22 | 2019-06-27 | Adidas Ag | Method for producing a shoe upper |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1484462A (en) * | 1965-06-25 | 1967-09-15 | ||
| US3848286A (en) * | 1974-03-11 | 1974-11-19 | A Kahmann | Method of and apparatus for custom molding footwear |
| FR2348665A1 (en) * | 1976-04-22 | 1977-11-18 | Salomon & Fils F | Ski boot manufacturing method - uses prefabricated standard mould shaped on users foot by heat treatment in oven |
-
1990
- 1990-10-19 DE DE69018485T patent/DE69018485T2/en not_active Expired - Fee Related
- 1990-10-19 EP EP90915275A patent/EP0553071B1/en not_active Expired - Lifetime
- 1990-10-19 WO PCT/CA1990/000360 patent/WO1992006607A1/en active IP Right Grant
- 1990-10-19 CA CA002092550A patent/CA2092550A1/en not_active Abandoned
-
1993
- 1993-04-14 FI FI931669A patent/FI931669A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0553071B1 (en) | 1995-04-05 |
| DE69018485T2 (en) | 1995-07-27 |
| FI931669A0 (en) | 1993-04-14 |
| WO1992006607A1 (en) | 1992-04-30 |
| FI931669A (en) | 1993-04-14 |
| EP0553071A1 (en) | 1993-08-04 |
| DE69018485D1 (en) | 1995-05-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |