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1. CA2072114 - METHOD OF SHAPING AND A SERIES OF SHAPING IMPLEMENTS FOR SLALOM BOOTS

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2; 3 5 ~ 4 1 ~ 2 ~ g 1 ~ 1~. E S P ~I T ~ Y 91/{16~31i P~~ oo2~;r~
A MI~T~IOV O~ S~APII~G AND ~ SERIES OF SHAPING; Il`$PLE~Nq'S FOR 5 LALO~; 13OOTS
The Ob~Qct of the invention is a method of shaping and a series o~ shaping implements for slalom boots, in which the lom boot consists of an outer shell made form hard plastio and an inner boot made from rlexible material.
A slalom boot should transfer the movements o~ the foot precisely a~. a foroe directed ~t the ski. ~n the other hand, ~ slalom boot should fit the individual foot of tho user without anv ~eelina o~ C7-;1mn;n-~. In ~c~or~ ce w~ n~3P ~e~hniq~ with the user’s foot by first chQo~;ing a larye outer 3hell and t~ ~ b~ s~ pe ~ sefls ~d~ with he aid of urethane foam. operationally a boot of this kind i~ not, however, optimal, becau e the ex~es3iYe flexibility of the inner boot reduces the technical operation of the boot.
In certain slalom boot models there are adjustments to alter the height of the Arch of the foot and to tilt the ankle to a limited amount to a desired angle. ~n any event the root is not a perfect fit ~o~ most uses and it is generally believed that a slight cramping hy the boot is normal.
Because the oost~ o~ the forms u6ed in the manufacture of the our shell are high, i~ is not possible to manufacture even different shaped in the ~am~ model and size. On the other hand even this would not be sufficient, beoause there is such an immense number of combinations of different anatomical properties that a 801ution of this kind is not po sible.
A slalom boot and.implements to shape it locally ~n accoxdan¢e with the user's foot are shown in patent publication US 3,~1g,974. According to thiY ~ pick to be heated i~ pr~s~d outwards from inside the shell of the boot. In practice shaping of a boot with an implement of this kind is rather limited unless high temperatures are used in heating i~, which may when damage the plastic material of 'che boot. The grades of plastic to used at present in bvots stick easily to thf~ heating head. On 3 5 ~: 4 1 6 ~ P Fl T ~:1 Y ;;~ 4
U ~I/V6231~ P~T/FI~ 0~l3 the other hand the publication qive5 no hin as to how the anatoJnical form of the root is transferred to the inside of the boot in the form of directions for hoping.
It i~ the intention of this invention to crèate a`method of shaping and a series of shaping implements for slalom boots, by means of which a foot with nearly arhitrary properties can be fitted to existing slalom boots. The characteristic features of the shaping method in accordance with the invention are lo presented in Patent Clay the ch~ra~c~fz~n~ D~r~sær~cs o~ implements developed to realize this are presented in Patent
Claim 4. com the point of view of the invention it is essential that it makes it possible to select a root o~ the correct length, after which the outer shell of the boot is given a shape biting the foot The. shaping i~ most advantageously carried out with the aid o~ hydraulic pressing devioes, in which wooden pressing head are used. A wooden pressing head does not adhere to the plastic material, which would hinder the shaping. Other advantages and forms o~ application of the invention appear later.
In what follows the invention is illustrated with the aid o~ the accompanying figures, which show one form o~ application of the invention and ~n advantageous series of implements. url 1 shows a pattern made in acGordance with a root and in ~t~an rna correction o~ a ~oo~ ng ca~ri~d out in acoordAnce with this
Figure 2 shows a p~e~ing head and corresponding passing 0 device intended to shape ~h~ heel.
Figura 3 ~ho~s the principal components v~ the series of shaping implements.
- Figura 4 shows the hydraulic jack unit seen from the side.
Figure 5 shows a third pressing device. figure 6 shows a cross-section of the pressing device in Figure
The slalom boot consists of a hard plastic per shell ~ and an nner boot ide of flexible material. In Figure 1 the outer boot 20 3 ~ 4 1 ~ I K E ~ P FI T (~ s 5 is cut above the 50le and the hydraulic pressing deYice 5 is placed inside tha boot. The hydraulic pr~q~ing device 5 includes a pressing hQad 9 made from birch wood, which forms the desired protrudes ion .
The shaping of the boot begins, however, with the measuring of the foot. The length of the foot principally determined the init blank to be ~ele~t~d, ~hlch ~on~i~ts of an industrially m~nu~a~ur~d slalom boot. ~n addition to the length of the foot its ~h~pe iB ~l~o recorded by the pattern 2, which generally will not ~i~ into a boot of the sorrect length. A ~u~ 3 ~ mAde in the cardboard pa~'cern 2, by man3 of whlc:h i~ can really be bent ~ such an angle that it ~it~ inside the outer shell 1 of the boot to be shaped. The placed to be shaped can then by easily looped.
The place to be shaped is heated with a hot-alr blower from both inside and out, when the plastic material softens, which makes ~t po~s~ble to shape lt. With the aid of the hydraulic pressing 6V deice ~ n~ h~At~d place iE; prel3sing by m~3~ns of` ~:he wooden pres lng hend 9, when a protrusion ~ c~t~d. After this the pattern 2 i~ once ~g~in compared with the shaped outer shell.
I~ may require 6ever~1 mappings be~or~ the p~ern fits the selected root.
In ad~lt~o~ to the individual s0l8 profile thsre may be higher individual ~ea~ur~ in the root. Among other things the ankle bone require there own corre ponding protrusion ~n the outer shell.
A special device, shown in Figure 2, has bin developed for broadening the heel. A pre~ng pair 20, which i sprezd with
Otherwise the ~api~ taken place as above.
By mean6 of the ~erles of implement ehown in figure 3 it i~ possible to make most o~ the pro~usic:ns xen ed in the outer 3hcllis of 2~1a.1cm bcl-. . A 3~ ~is~ c~ the ~ klnd ~ hot air ~l~w~ ~, u ~1y~ruull~ yuv , pre y d~YlC~g ~ 7~
x 3 5 8 4 ~ K E S P FI T ~ k and posing heads 9 adaptgd to them. one pre g heads 9 are made from birch or other hard wooden material. Birch wood has been ~h~wn to be espeelally well suited to this purpose, because it is sufficiently hard and on the other and it doss not adhere ~c the head plastic.
l!ho p~ p unlt 1~ coJ~ t-~ of c~ pump cyl~ndel- 12, E ~UL~ ~, operated wlth the aid of lever ll, valve lS to dlrect the pres~url~d olt to one of the two exit connection 14, to whlch the casing devices 5, 6, 7 are connected. The pump unit 13 includes ih addition an oil reservoir, and counter and shut-off valves.
If the pressing devices in accordance wlth Figures 5 and 6 are 15 ~ u~zod . the .plnce belrly ~h~l~ed ~ ~; de~err~1.n~ nrt web the heating point. Here the pressing devloe ~ includes two plates 16, 17 set a distance apart ~n~ a flexible bas 18 placed between them, which when compressed pu~he~ the wooden pre3sing head8 20 set in the outer ring ou~wa~d~ ~g~in~t the inner wall of the boot. The passing heads 20 are ~onneo~ed to each other by means o~ the ~pi~al spring 21 threaded through them.
Pressurized olt i~ fed to baçl 18 through connector 19. The p~e~ure i~ equally great in all direction, ~u~ a change in shape makes place only eat the point o~ the external h~a~ing.
The shaping in accordance with the above is naturally carxied out s~par~t~ n Sch boot. ~r~m the ~P~25~r~nt to the ~h~p~ng o~ the boot.