Improved inner lining shoe for boots

Abstract: In an internal lining (10) shoe for boots, particularly ski boots, the fore tongue (15) is floatingly anchored to the vamp (11), in order to slide with respect to the vamp (11), through resilient returning means (19); the lining shoe structure is of a such a kind not having excessively rigid areas reducing the shoe comfort.

Description: The present invention relates to internal lining shoes for boots, particularly ski boots. It is well known that usually the ski boots comprise an external rigid shell, whose sole is anchored to the ski, an internal sole and an internal lining shoe completely envelopping the foot, preventing any direct contact between foot, the ankle and the lower portion of the leg with the external rigid shell. This lining shoe is usually provided with a large fore tongue, movable with respect to remaining portion of the shoe, for allowing foot entering, in the same way of the fore tongues of standard shoes. In operating terms, the lining shoe provided with the fore tongue must assure a tight connection between the user foot and the external shell to faithfully transmitt all the controls which the foot intends to give to the skis. The lining shoe must further assure an excelent "comfort" both with respect to easy fitness and good adaptability to different positions and movements of the external shell and, more specifically, it do not have to apply local pressures on critical portions of the foot when the external shell is fastened. To meet these requirements, has been proposed a kind of lining shoe having a tongue integral with the fore portion of the vamp, being said lining shoe the subject matter of the European Patent Application EP-A-0 427 321 filed on October 30, 1990 in the name of the present Applicant. Further, another kind of lining shoe having a tongue floatingly anchored to the vamp, i. e. with possibility of relative resilient sliding with respect to the vamp, has been proposed: this kind of shoe is the subject matter of EP-A-0 317 798, filed on October 31, 1988 in the name of the present Applicant, being the description thereof here referred for a better knowledge of the lining shoe structure. This prior art forms the preamble of independent claim 1. The second mentioned shoe substantially meets the above indicated requirements, however in the area in which the tongue is connected to the vamp, it has a critical area with enlarged thickness, where in extreme cases it is possible to have a pressure excess localized on the foot back, as a consequence of external sheel fastening. Further the structure of said lining shoe appears rather complex with evident consequences on the manufactoring costs. It is on object of the present invention to eliminate such a critical localized pressure area and semplify the shoe structure. Thus it is the subject matter of the present invention an internal lining shoe for boots comprising a sole, a fore opened vamp and provided at said fore opening with a tongue, and a leg portion completing said vamp, being said tongue floatingly connected to said vamp, i.e. with relative sliding possibility with respect to the vamp, comprising said tongue at least a rigid external layer wherein said layer is connected to said vamp through a resilient means constrained on a first side to said rigid layer and on the other one to said vamp, characterized in that said resilient means consists of a resilient strip, said resilient strip being connected to the rigid layer by means of a pin having flat heads, and being connected to said vamp through a seam, an at least more internal and sfoter layer extending without any interruption from the top of the tongue to the tip of the lining shoe and continuously extending along the whole lenght of the fore portion of the vamp, this internal layer being connected to the tongue and the fore portion of the vamp by means of a seam extending along the external edges of said members. Preferably said internal continuous layer has variable thickness, being the thickness at the fore portion of the vamp lesser than that at the tongue. According to a further preferred embodiment, between the resilient strip and the most internal layer is interposed an intermediate plastic layer having at least the surface facing the resilient strip smooth enough to allow a sliding of said resilient strip. Preferably said intermediate layer extends at least for the whole lenght of said resilient strip, has a width at least equal to said resilient strip, a constant thickness lesser than the external layer of the tongue and is more flexible than the external layer of the tongue. Preferably, said internal layer is connected to the external layer by means of a flat headed pin crossing a buttonhole having the same length of the relative sliding of the tongue and is connected to the fore portion of the tongue by means of a seam. These and still other features, as well as the relating advantages, will be more apparent by the following detailed but not limiting description referring to the enclosed drawing, in which: figure 1 is a perspective view of the lining shoe according to the present invention; figure 2 is a perspective view of the tongue and the fore portion of the vamp each other assembled; figure 3 is an elevation side view in cross-section of the lining shoe of figure 1; and figure 4 is a view, similar to figure 2,of an embodiment variation of the tongue and the fore portion of the vamp. Referring to figure 1, the lining shoe 10 comprises a vamp 11 with a fore portion 12 an aft portion 13 and a leg portion 14, a tongue 15 and a sole 16. The vamp 11 can comprise a pair of PVC bands 11A transversally each other connected by a closing resilient web 11B. The tongue 15 is arranged at the fore opening of the vamp 11 and the leg portion 14, closing the opening itself when the external shell of the boot (not depicted) is closed and fastened around the lining shoe. As shown in figure 2, the tongue 15 is connected with the fore portion 12 of the vamp and, as herebelow explained, it is possible to say that it forms an integral part of said vamp. The figure 3 shows the structural members of the lining shoe and specifically the structure of the tongue 15 and the connection between that and the fore portion of the vamp 12. The tongue 15 comprises an external layer 16a of rigid plastic material (such a stiffness is higher than the vamp and namely could be of the same order of the external shell). The vamp material, or better the most external layer thereof, could be an elastomer,for example neoprene rubber, supported by a square fabric. Said layer 16a extends from the highest portion of the tongue to an around arranged region at the back of the foot, or also near the vamp, being the end corresponding to such an area connected to the end 18 of the fore portion of the vamp 12 by means of an underlying resilient strip 19, being both ends 17 and 18 each other faced and contacting. The ticknesses of the two ends 17 and 18 are substanially equal, in order to avoid lack of uniformity reducing the "comfort". The resilient strip 19 has an end 20, extending beyond the end 17 of the layer 16, to which is connected by means of a flat headed pin or rivet 24. The opposed end 21 extending under the most external layer of the fore portion 12 of the vamp, is connected to the latter by menas of a seam portion 22 (see also figure 2), as preferably said resilient strip has a lesser width than the tongue. The resilient strip 19 rests against an intermediate plastic layer 23, which has an abutting surface smooth enough to allow the distorsion sliding of the resilient strip, for example when it is subjected to tensile stress. Said intermediate layer 23 extends at least for the whole length of the resilient strtip 19, has a width at least equal to that of the resilient strip 19 and a costant thickness namely of about 1 mm or less, in order to provide a well higher flessibility than the external layer of the tongue and substantially of the same order of that of the external layer of the vamp. It is important that the intermediate layer 23 do not have substantially any influence on the flexibility of the vamp 12. The intermediate layer 23 is connected to the fore portion of the vamp by means of the seam 22, while is anchored to the external layer of the tongue by means of the flat headed pin or rivet 24 passing through the buttonhole 25 having a length equal to the relative sliding stroke of the tongue, so resulting controlled in the extension. The buttonhole width is substantially equal to the diameter of the pin 24, while the heads thereof have a larger diameter to avoid pin slipping from the buttonhole. Under the intermediate layer 23, and beyond the extension area under the rigid layer 16a of the tongue, on a side, and under the most external layer 12 of the vamp on another side, is applied a continuous stuffing layer 26, in turn covered by a fabric lining on the whole surface directly contacting the foot. The lining can comprise a felt, a foamed elastomer and other similar material layer; a neoprene foamed "liner" associated to a fabric can coat the most internal portion of the stuffing (in the subsequent terminolgy for "stuffing" or "stuffing layer" is intended any component therof and in the specific case the "liner" is part of the stuffing). In any case the materials forming the stuffing must have some resilience, able to absorb without tearing the relative sliding of the tongue with respect to the vamp. The stuffing layer 26 extends without any interrruption from the top 27 of the tongue to the tip of the lining shoe, lining the whole internal surface of the integrated member comprising tongue and fore portion of the vamp. The stuffing layer 26 is applied to the tongue and the fore portion of the vamp by means of a seam along the edges 28 of the two components, interrupted at the ends 17 of the tongue and 18 of the vamp to allow the relative each other sliding; at the top of the tongue and at least part of the side edges, the stuffing 26 can form a cuff 29 around the external most rigid layer. Of course, the stuffing layer can be also applied by means of adhesives, or by means of a combination of seams and adhesives. As shown in figure 3, the thickness of the stuffing layer 26 is variable and tends to gradually decrease from the tongue to the fore portion 12 of the vamp; of course, the thickness is large enough to smooth any irregular or uneven feature due to overlapping of material layers arranged over said stuffing, specifically at the foot back portion, compromising the "comfort" of the lining shoe when the boot shell is thereabout closed and fastened. From the above specification clearly comes out that the area about the ends 17 and 18 respectively of the tongue and the external layer of the vamp (which could be called "critical area" for the "comfort" problem) has substantially constant and uniform thickness: it means that in spite of the "floating articulation" the path from the tongue to the vamp does not show subsantial uneven/irregular features or steps. On the other side, it is to exclude that such a kind of uneveness can protrude owing to the presence of the resilient strip 19 and the intermediate layer 23, being the thickness thereof substantially uninfluential with respect to the thickness of the tongue and the vamp. Such a kind of uneveness cannot substantially exist at the heads of the pin 24, being said heads rounded and bevelled in order to distribute on the widest the possible area this uneveness. As a consequence, the structure according to the invention has the minimum of irregular/uneven features concentrated in a restricted and critical area:this is an important premise for reaching the highest the possible "comfort". To reach this result the internal stuffing is continuous from the tongue top to the vamp tip, not having any "uneveness"; on the other hand the stuffing has adequated thicknesses to smooth any residual uneveness. There is a substantially improved comfort with respect to that of the known lining shoes of the prior art, through the assembly of semplified components with manufacturing cost benefits. It is not to disregard the importance of the intermediate layer 23, which assures the total sliding on its own surface of the resilient strip 19. It means that the stretching and contraction of the resilient strip is not prevented by rough surfaces, as for example the surfaces of a stuffing material (as indicated in the state of the art), and through the structure according to the present invention there is the highest comfort with the highest efficiency of controlled "floating sliding"between tongue and vamp. In figure 4 an embodiment variation is shown, in which parts similar or corresponding to those of figure 2 are indicated by the same reference numerals, being different for the arrangement of the floating connection through a pin or rivet 24'. While the lining shoe according to the present invention has been specified having reference to preferred embodiments thereof, it is intended that possible changements and variations thereof come into the covering scope of the present invention.

Claims: Internal lining shoes (10) for boots comprising a sole (16), a fore opened vamp (11) and provided at said fore opening with a tongue (15), and a leg portion (14) completing said vamp (11), being said tongue (15) floatingly connected to said vamp (11), i.e. with relative sliding possibility with respect to the vamp (11), comprising said tongue (15) at least a rigid external layer (16a) wherein said layer (16a) is connected to said vamp (11) through a resilient means (19) constrained on a first side to said rigid layer (16a) and on the other one to said vamp (11), chaeacterized in that said resilient means consists of a resilient strip (19), said resilient strip (19) being connected to the rigid layer (16a) by means of a pin (24) having flat heads, and being connected to said vamp (11) through a seam (22), an at least more internal and softer layer (26) extending without any interruption from the top of the tongue to the tip of the lining shoe and continuously extending along the whole lenght of the fore portion of the vamp (11), this internal layer being connected to the tongue (15) and the fore portion of the vamp (11) by means of a seam (22) extending along the external edges of said members. Internal lining shoe, characterized in that said resilient strip (19) is of a lesser width than the tongue (15). Internal lining shoe, as in claim 1, characterized in that said most internal continuous layer has variable thickness, the thickness at the fore portion of the vamp (11) being lesser than that at the tongue (15). Internal lining shoe, as in claim 1, characterized in that between the resilient strip (19) and the most internal layer is interposed an intermediate plastic layer (23) having at least the surface faced to the resilient strip (19) smooth enough to allow the sliding of said resilient strip (19). Internal lining shoe, as in claim 4, characterized in that said intermediate layer (23) extends at least along the whole length of said resilient strip (19). Internal lining shoe, as in claim 4, characterized in that said intermediate layer (23) has a width at least equal to that of said resilient strip (19). Internal lining shoe, as in claim 4, characterized in that said intermediate layer (23) has a constant thickness, lesser than the external layer (16a) of the tongue (15). Internal lining shoe, as in claim 4, characterized in that said intermediate layer (23) is more flexible than the external layer (16a) of the tongue (15). Internal lining shoe, as in claim 4, characterized in that said intermediate layer (23) is connected to the external layer (16a) of the tongue (15) through a pin (24) provided with flat heads crossing a buttonhole (25) having length equal to the relative sliding stroke of the tongue (15). Internal lining shoe, as in claim 4, characterized in that said intermediate layer (23) is connected to the fore portion of the vamp (11) by means of a sem (22).

Inventors: GABRIELLI ANDREA, GABRIELLI, ANDREA
Applicants: TECNICA SPA
Application year: 1991
Main classification: A43B5
IPC codes: A43B19, A43B5, A43B23