DE2037177A1 - Inner boots and process for their manufacture - Google Patents

Description

DIPL.-ING. KLAUS BEHN DIPL ₁ -PHYS ₁ ROBERTMuNZHUBER

patent attorneys 8 munich 22 wl den mayerstrasse 5

TEL. (O811) 22 25 30-29 5192

Our reference: A 20870 / Do 27 ο July 1970

Mr. Melvin William DALEBOUT, 3661 Ceres Drive, Salt Lake Oity , Utah, USA.

Inner boots and process for their manufacture

One of the greatest difficulties encountered with ski boots and similar boots "is in adapting the boot to a person's foot snugly without affecting the foot and the Ankle pain is exposed because the boot is too tight ο

To overcome this difficulty, malleable soles are used in the boot, as in the US patent No. 3 474 561, individual areas in the boot can also have a gritty Substance or semi-resins

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109834/0206

ORIGINAL INSPECTED

that are flowable and conform to a person's foot, as described in US Pat. 3,325 ^! j20 and 3 377 721 already shown. In all known attempts, however, only a part of the inner boot has been adapted to the shape of a person's foot, ie, generally that part of the boot which molds to the sides of the foot and the lower ankle. Accordingly, the foot can still move within the boot unless the boot fits snugly against the foot. This means that the parts of the boot that do not conform to the shape of the foot can put considerable pressure on the foot, which in turn can lead to pain.

It is the main object of the invention to provide an inner boot for substantially rigid boot shells, such as E.g. ski boot shells, the inner lining of which adapts to the shape of the foot in a known manner and the outer lining of which adapts to the shape of the foot Adjust the inner lining of the boot shell.

Another object of the invention relates to a method

for shaping the inner boots.

In the broader sense, the invention relates to the inner boot, the

is used in an outer supporting shell and which has such a large, stretchy inner surface that it supports the foot and the

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BATH

Ankle joint. A stretchy outer lining is around the inner lining, so that between the inner and outer liner to form a substantially closed space. Between the inner and outer lining there is a attached resilient part, which is formed in order to bring the inner lining in a shape which adapts substantially to the foot in the inner lining, and thereby the Bringing the outer lining into a shape, \ felehe the inner shape the outer support shell.

In another embodiment of the invention, the elastic fabric a resin elastomer.

In a further embodiment according to the invention, the Resin elastomer formed by injection as a soft, liquid reaction mixture, namely in the between interior and outer lining when the foot sits in the inner lining and the inner depth of the boot outer shell, whereupon the reaction mixture of resin elastomer sets.

In another embodiment according to the invention there is the inner lining of the inner boot is made of a closed-pore foam base, with the surface of these soles on stretchable fabric material is applied.

109834/0206

BAD ORlQiNAU

Embodiments of the invention are shown in the drawing, for example shown, namely show:

1 shows a side view of an inner boot according to the invention with an umbilical cord attached to it, to inject a liquid resin elastomer reaction mixture into the space between the boot liners,

2 shows a plan view of the boot according to the invention,

Fig. 3 is a partial section along lines 3-3 of Figs

4 shows a partial section of a detail of the inner wall of the boot, specifically during the construction of the wall.

1 and 2 show the inner shoe 10 _P according to the invention. As shown, the inner shoe 10 is a high-shafted boot which accommodates the foot and the ankle. The shaft part 12 of the boot 10 preferably extends beyond the upper edge of the outer shell. The inner boot prevents the ankle from touching the outer shell of the boot. While the inner boot 10 can be used with any boot outer shell, the boot is preferably used with a substantially rigid shell.

The inner boot 10 consists of an outer lining 14 and an inner lining 16, which are connected to one another at the upper edge 18 of the ankle shaft 12 of the boot, so that a space is formed between the lining 14 and 16. If the foot is in the inner boot, the space 20 χ is sufficient

to the

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• BAD ORIGJNAl.

whole foot around. The inner lining is preferably IC) and the outer lining 14 made of a flexible material, such as a suitable, plastic fabric, leather, fabric or a similar material, so that the putter can be brought into a predetermined shape if the space 20 with a, under Resin elastoner introduced under pressure is filled. The resin elastomer will be described in detail later, '■ / ie shown in Fig. 5, the inner lining 16 is somewhat smaller than the outer lining 14, so that the outer layer fits closely to the inside of the boot outer shell can, while the inner lining Io follows the shape of the foot or the adjusts shoe trees located in the inner boot 10. The shaft part 12 of the inner boot 10 is slotted so that the foot can easily slip into the lower part of the boot. A known tab 22 can be found in the boot under the slit be provided, which closes it.

The friction at., To restrict the inner boot located foot to a minimum., Is as described in U.S. Patent Ho. J * KK'j described O44 brought a protective layer over the inner surface of the lining, which sichwahlweise also itself as a lining lets use. Such protective layers of the type described in the above patent specification include a closed-porous foam under greenet 24,

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BATH

a fabric that is preferably stretchable in both directions is glued to its inner surface, ie to the surface of the substrate 2h which is adjacent to the shoe sitting in the inner boot. The substrate 2h consists of an expandable foam that is closed-porous, such as neoprene, closed-porous rubber, polyvinyl chloride, rubber latex, vinyl foam and similar materials. The stretchable fabric 26 has a smooth surface between the protective layer and the foot. Any material or fabric with a lower coefficient of friction than that of the protective layer 2h , which can be stretched or stretched on both sides, so that movement is transmitted through the fabric to the underlying surface can be used. The best example of a material of this type that transfers movement to the ground is stretch nylon or elastic nylon. The material 26 is adhered to the substrate 2h with a rubber-like adhesive so that the elastic properties of the fabric or the foam are not impaired when the material is adhered to the substrate 2h .

The filler of the present invention is a resin elastomer which is capable of taking an elastic shape. It can be bent and compressed and still returns to its original shape. Are polyurethane elastomers particularly suitable as fillers. These elastomers are

109334/0206

formed by liquid reaction mixtures of organic polyisocyanates and polyols with a catalyst and, optionally, a filler. If a suitable catalyst is used, then the reaction takes place at Ambient temperature and pressure.

Suitable organic polyols to produce polyurethane elastomers include simple polyols such as ethylene glycol or glycerol, as well as polymeric polyols such as polyester polyols and polyalkylene ether polyols. The organic polyols are preferably made from polyalkylene ether polyol, as in U.S. Patents Ho. 3,249,855 and No. 3,201.

Typically suitable organic polyisocyanates around polyurethane elastomers are aliphatic polyisocyanates such as hexamethylene diisocyanate etc., cycloaliphatic polyisocyanates, such as cyclohexyl 2, 4 diisocyanates, 4, 4'-methylenedi (cyclohexyl isocyanate), etc, and aromatic polyisocyanates such as 2,4-Tolnoldiisocyanate, 2,6-T.olnoldiisocyanate, 4,4-methylenedi (phenyl isocyanate), 1,5-naphthalene diisocyanate, 4,4 ', 4' '- triphenylmethane triisocyanate, polyalkylene, polyaryl, polyisocyanates as in the US patent No. 2 683 730 shown

10 98 34/0206

The ratio of In used in the polyurethane reaction Organic polyisocyanates and polyols can be changed depending on the particular properties of the desired Polyurethane product. By using urethane elastomers according to the preferred embodiment of the invention produced the amount used corresponds to an NCO: OH ratio of approximately 0.9: 1-1.4: 1.

Suitable compounds which serve as cold vulcanizing catalysts are, for example, certain organotin compounds made of tetravalent tin. These organic tin compounds

e
bonds have at least one tin chalcogen valence bond. Typical groups of these tin catalysts are organotin oxides, hydroxides and carboxylates

(Sn "0 - $ -), I ι

Alcoholates (-Sn-O-C-),

or corresponding compositions. Typical examples of effective tin catalysts in this group are dibutyltin diacetate, Dibutyltin di-2-ethylhexoate, dibutyltin oxide, dibutyltin ionomethosymethyl maleate, dibutyltin sulfide, Tributyltin 2-ethylhexoate, monobutyltin tri-2-ethylhexoate, Triphenyltin hydroxide, di- (tri-butyltin) oxide, di- (tributyltin) tetrapropenyl succinate, di- (tributyltin) n-nonyl succinate and di- (tributylzinijtnalonat.

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Another group of cold-vulcanizing catalysts for liquid-curable polyurethane reaction processes of the kind described above are replaced by soluble salts represented by organic acids from lead, bismuth, antimony, mercury, tin and especially by salts of fatty acids. Typical of these metal salts are those of the fatty acids, polygamy, soluble in a glycol and urethane reaction mixture are. A preferred group of catalysts are lead salts, such as lead octoates (lead di-2-ethylhexoate) and lead naphthenates and like lead drying salts.

As already mentioned, a filler can be added to the urethane-forming reaction mixture to improve the properties to change the elastomer. For example, even very small amounts of finely divided, neutral ones increase Fillers the resilience properties of the elastomer. Any suitable finely powdered organic or inorganic Material or combination of materials which are neutral to the reaction of the elastomer-forming reactants can be incorporated into the polymer.

Typical examples of suitable fillers are more elastic Mica, cork, perlite, attapulgite, calcium silicate, kaolin, Magnesium trisilicate, talc, zinc sulfide, red lead oxide, barium sulfate, eutonite, calcium fluoride, halloysite, titanium dioxide, Aluminum silicate, amorphous silicon dioxide, etc.

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109834/0206

ORIGINAL

The amount of fillers used is generally irrelevant. It can be changed to a large extent and depends as already mentioned, largely depends on the special properties and characteristics of the final elastomer product desired. Generally, the amount of filler added is between $ 10 and $ 60 of the total weight of the reaction mixture.

Specific examples of the process to make polyurethane elastomers to prepare which are useful for this invention are described in U.S. Patents 3,4-29,855 and 3,201,136, these patents are here included in their entirety.

The inner boot 10 according to the invention adapts exactly to the foot of a person. The inner boot sits in an outer Support shell that is then closed around the inner boot when the foot is in the inner boot. Optionally, the the shape of the foot and the ankle joint. · there are shoe trees in the shoe. A liquid resin elastomer reaction mixture of the type described above ,,, is then pressurized into the Sprayed space 20 until the space is essentially full. As a result, the inner lining 16 is directly adjacent to the foot and the Ankle or the shoe tree, and the outer covering 14 is pressed against the inner surface of the outer support shell. An umbilical tube is used to speed up the filling process 28 to the surface 14- connected to room 20

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BATH

appropriate. The umbilical opening is preferably located in the covering Ik and closes directly on the upper part of the shaft part 12 of the inner boot over the upper part of the outer surface of the outer shell. However, an opening through which the umbilical tube extends can be made at any suitable point in the outer shell.

When fitting the inner boot 10, it is mostly desirable to provide a larger space for the toes so that the Toes have enough space in the boot. If this is desired, then it can be over the toes before the boot put on a putter. After the filler is injected into the space 20 of the inner boot The toe lining can be removed. This gives you more space for your toes. This manufacturing stage can of course be omitted if a shoe tree of the appropriate size is to be adjusted is used.

It should be noted that _; unless means are provided so that the air can escape from the space 20 when the liquid resin-elastomer mixture is injected, the space 20 cannot be completely filled. It is therefore preferred to connect the covering 1% and 16 of the inner boot 10, for example by sewing, whereby the air can escape from the stidhen, but which are sufficiently dense _/ to prevent the liquid

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BATH ORIGINAL

Mixture passes through. If air sacs form in the room, then the air can be removed by means of a known hypodermic needle be pulled out.

The individual components of the elastomer reaction mixture can be prepackaged so that the reaction mixture is easy can be produced. For example, a three-pack for polyurethane elastomers is used, in which a predetermined Amount of polyisocyanate, polyol and a vulcanizing catalyst are packed in individual containers. If an inner boot 10 is filled with an elastomer under pressure, then the individual packets become which contain the reaction components, emptied into a container and together into a substantially homogeneous reaction mixture mixed up. The reaction mixture is preferably whipped while stirring, since it is mixed to take up air bubbles, which reduce the weight of the elastomer during curing and increase its insulating properties. After the space-20 is filled to the desired degree, the resin elastomer is allowed to cure. This is done through the environmental conditions. Optionally, the cure rate can be accelerated by changing the temperature of the inner boot environment is increased. Preferably, the boot 10 is filled with a resin elastomer which is less than Cures in 60 minutes, even better, in 10 to 45 minutes

109834/0206

from the time the resin reactants interact with each other be mixed. After the reaction mixture has hardened, the umbilical tube 28 is severed immediately at its connection point with the outer wall 14, via the outer wall a patch may be attached to the severed umbilical tube will.

It should be noted that _; When the inner boot 10 is used with the outer shell of a ski boot, it is particularly necessary to apply a terminal edge 30 to the edge of the upper part 12 of the inner boot which fits exactly around the ankle. This prevents snow and water from getting into the shaft part. The edge can be made of any soft material such as stretch nylon or the like.

109834/0206

Claims (12)

-H PATENT CLAIMS 1. Boots ^ characterized by an elastic inner lining (16) of the sizes to accommodate a person's foot, one attached to the inner lining (16) Outer lining (H), with an essentially closed space (20) between the inner and outer lining forms, and an elastic shaping means which is introduced into the space (20) and substantially fills it, thereby the inner lining (Ιό) on and around the in the inner lining (16) seated foot adjoins. 2. Boot according to claim 1, characterized in that the elastic molding agent is a resin elastomer. 3. Boot according to claim 1, characterized in that the inner lining is large enough to accommodate the foot and ankle. 4. Boot according to claim 1, characterized in that it can be used as an inner boot (10) in an essentially rigid outer boot. - 15 - 109834/0206 5. Boot according to claim 4, characterized in that the boot outer shell is rigid and a ski boot outer shell. 6. Boot according to claim 4, characterized in that the outer lining (14) flexibtDefLst, and the elastic Means is shaped to bring the outer liner (14) adjacent the inner walls of the outer boot shell, 7. Boot according to claim 6, characterized in that the inner lining (Ιό) is so large that it is the foot and can accommodate a person's ankle. 8. Boot according to claim 7 * characterized in that the resin elastomer is a polyurethane resin. 9 · Procedure for customizing a boot on the foot of a person, characterized in that the boot is provided with an elastic inner lining (16), that is large enough to accommodate the boot and with an outer lining (14) that attaches to and around the inner lining (16) is attached so that a substantially closed space (20) is formed between the inner and outer lining, and when the foot is seated in the inner liner (16), a liquid resin elastomer reaction mixture is injected into the space (20), 109834/0206 - 16 - until the space (20) is essentially filled, whereby the inner lining (16) is brought to and around the foot, and the resin-elastomer mixture solidifies * during the foot sits in the inner lining (l6). 10. The method according to claim 9 *, characterized in that that the boot sits in a substantially rigid support shell and the resin elastomer reaction mixture in the space (20) is sprayed until the inner liner (16) is adjacent to and around a person's foot, and the outer liner (14) against the inner walls of the outer shell of the boot. 11. The method according to claim 9 » characterized in that that the reaction mixture is mixed with air before it is injected into the space (20) « ^{T <} nLrd. ', 12. The method according to claim 11, characterized in that that the resin elastomer reaction mixture is a reaction mixture of polyurethane resin. IJ. Method according to claim 9, characterized in that the reaction mixture of resin elastomer is injected by means of an umbilical tube (28) which is in communication with the space (20) which is connected to the outer lining (14). - 17-109834/0206 14. Boots that are made to measure to fit a person's foot is, characterized in that the boot has an elastic inner lining (16) in which the foot is located, as well as an outer lining (14) which is fastened around the inner lining, with between the outer and Inner lining a substantially closed space (20) is formed, and an umbilical tube device (28) is present which is in communication with the space (20) 'and is attached to the outer lining (14), around the filling material to be able to inject into the space (20). 15. Boot according to claim 14, characterized in that the boot is substantially rigid Boot outer shell is located. 16. Boot according to claim 15 *, characterized in that the inner boot is large enough to accommodate a person's foot and ankle. IT. Boot according to claim 16, characterized in that the umbilical tube device (28) to the shaft portion (12) of the outer lining (14) at a location above the boot sheep trandes of the outer shell is attached. 109834 / Π706 Le soap