US2207632A - Resilient insole - Google Patents

Description

July 9, 1940. M. MARGoLlN RESILIENT INsoLE Filed May 8, 1939 3 Sheets-Sheet 1 INVENTOR. mager muraglia m04@ ATTORNEY S July 9, 1940# M. MARGOLIN 2,207,632

RESILIENT INSOLE Filed Ilay 8, 1939 3 Sheets-Sheet 2 I'NVENTOR, meyer TIIargolin ATTORNEYS July 9, 1940. M. MARGOLIN RESILIENT INSOLE 3 Sheets-Sheet 5 Filed lay 8, 1939 iss' INVENTOR. magm marsolin www ATTORNEYS Patented'July 9, 1940 UNITED s'mras PATENT OFFECE RESILIEN'E INSOLE Meyer Margoiin, Elgin, IiiB Application May 8, 1939, Serial Non 272,364

I 8 Claims.

My invention relates to a novel resilient insole and more particularly to an insole, the iorepart of which is resilient with a periphery ci material stiff enough to hold the necessary stitching for attachment of the insole in the shoe.

My novel insole has grooves located on the bottom thereof, which grooves are substantially rectangular in cross section. The grooves are adapted to be compressed and expanded to prosuitable perforations in the insoleto the interior of the shoe.

I provide ball cushion support for the foot by means of a central resilient portion of greater thickness than the edge portion'of lap and in. sole. Y

The prior art has long recognized-the prolotions have been devised which suitably meet the problems of providing resilience and forced breathing in the forepart of the shoe.

My invention comprises a resilient insole, the

forepart of which is primarily constructed of materials, such as cellular rubber or other resilient material, and the periphery of which comprises either leather alone or leather in combination with the-resilient material, the leather providing stiffening and backing for holding the stitching.` The relatively stiff material may be any material, thephysical properties of which correspond to leather in this art.

I provide perforations in the resilient material which extend through the resilient material and I also provide certain transverse grooves which are alternately compressed and expanded bythe action of the foot in Walling so as to force air from these transverse grooves through the perforations to the foot` itself.

I provide various constructions by means of which I can achieve the desirable objective of a resilient insole with stifl" periphery, which insole is permeable to air and which insole may carry integral therewith metatarsal support and arch support.v Y l My resilient 'insole is not to be confusedwith the rubber resilient fillers which have been disclosed in thisart. Such llers lie between the `insole and the outsole and although they are resilient inA themselves do not increase the resilience ofthe forepart of the shoe but act only to possibly soften such forepart to the step.

Such rubber fillers have been employed to force vide forced breathing which is transmitted by (Ci. 36m-3) air into the shoe only by means of a complex arrangement in which an opening under the main arch is employed. My construction provides -for the first time a novel resilient insole which in itself is formed to provide resilience for the forepart of the insole and at the same time a forced breathing simultaneously. over a large area oi' the forepart of the shoe.

Itfis, therefore, an object of my invention to provide a resilient insert with a/periphery sufciently stift to hold the necessary stitching.

It is a further object of my invention to provide a resilient insole having transverse grooves extending part way across an insole and perforations adjacent said grooves, said grooves being. adapted upon expansion and .compression to force air through said perforations.

It is still a further object of my invention to provide a resilient insert in an insole, which insert carries the above described forced breathing grooves and adjacent perforations.

It is a further object of my invention to provide a resilient insole having about its periphery recesses into which are inserted stifening pieces comprising a stii toe member, stifil side members, and a stift shank portion oi an insole, in separate sections.

These and further objects of my present invention will become apparent from the description which follows taken in connection with the drawings, in which:

Figure l shovvsA a shoe in partial side eleva- .tion and partial section, the section showing the general construction of my resilient insert in its normal position.

Figure 2 is a cross-section of an enlargement of my resilient insole in which in descending the footacts to compress the air contained in the expanded grooves forcing such air out through the adjacent perforations on to the foot.

Figure 3 is a plan view of the bottom of the resilient insole of my invention.

' Figure i is a cross section taken along the line 4--4 of Figure?. I

Figure 5 is a section taken along the line 5--5 of Figure 3.

Figure 6 is a section of'Figure 5 in itsfbent condition when due to the action oi the foot in 'walking the grooves contained therein are expanded preparatory to being compressed to expel l air through` the adjacent perforations.

Figure '7 is a plan view of the top ofthe resilient insole of my invention showing'a construction in which the rubber middle portion hasa stiffening members which are adapted to hold the stitching of the shoe.

Figure 8 is a section taken along the lines 8 8 of Figure 7. l,

Figure 9 is al section taken along the line 9-9 of Figure 7.

Figure 10 is a section taken along the line Ill- I0 of Figure 7.

Figure 11 is a plan View of the top of a modied form of the resilient insole of my invention in which the rubber middle portion has a single flap and the various stiffening members, comprising a toe stiffening section, side stiffening sections and the shank portion, are laid on to that flap to be united thereto.

Figure 12 is a cross section taken along the line I2-I2 of Figure 11.

Figure 13 is a cross section taken along the line I3-I3 of Figure 11.

Figure 14 is a section taken along the line Ill- I4 of Figure 11.

Figure 15 is a plan View of the top of a modified form of my invention in which the middle rubber portion has a central flap on each side of which are laid stifening members to be united to that flap.

Figure 16 is a section taken along the IG-IS of Figure 15.

Figure 17 is a section takenalong the I 'I-I'I of Figure l5.

Figure 18 is a section taken along the I8-I8 of Figure 15.

Figure 19 shows a modified form of my invention in which I provide a ,resilient insole and a binding about the periphery thereof of a relatively stiff material adapted to receive stitching.

Figure 20 is a section taken along the line 21-21 of Figure 19.

Figure 21 is a section 28-28 of Figure 19.

Figure 22 is a section 29-29 of Figure 19.

Figure 23 is a section 30-30 of Figure 19.

Figure 24 shows in perspective the end, side and shank stiifening pieces shown in plan in Figures '7, 11 and 15. The recesses in the toe and shank portion are for the purpose of receiving corresponding projections in the middle rubber portion whereby rm and accurate engagement is provided.

Referring now more specifically to the drawings, in Figure 1 I show a shoe I having an outsole 2, a sock lining 3 and an insole 4 positioned therebetween. The insole 4 has perforations 5 which extend therethrough and perforations 6 in the sock lining match in position the perforations 5 in the insole. The insole 4 is formed of a peripheral portion of stiff material 'l such as leather or a composition of similar qualities adapted to retain the stitching therein. The central portion 8 of said insole is of resilient material such as expanded rubber, as for example closed cell rubber or spongerubber, or any suitable corresponding resilient material. Located between the perforations 5 or adjacent thereto are grooves 9, the lateral or side walls of which are normally vertical and spaced one from the other. Accordingly the grooves shown are rectangular in cross section.

At the bottom of the perforations 5 are bosses or extensions Il) which have a dual function. They increase the resilience of the construction and make for a softer step and at the same time facilitate the forced breathing action in line line

line

taken along the line taken along the line taken along the line that the air forced from the compressed groove 9 can more easily escape into the perforation 5. That is the air can pass more readily by this relatively narrowlend portion I0 of the perforation 5 than it could through the relatively wider area from the groove to the perforation itself if a flat construction were used. Inasmuch as optimum resilience and breathing is here desired, all these features which tend to achieve that result are preeminently desirable.

As can be seen in Figure 3 these grooves are closed at each end and extend only part of the way across said resilient portion. Said grooves,

therefore, constitute closed chambers having lateral walls which, in walking movement, move away from one another causing expansion therefore drawing in air and, upon contraction, the walls move toward one another forcing out said contained air, which air then travels to and through the adjacent perforations to the foot as shown more particularly in Figure 2.

The relative position and size of this groove is clearly shown in detail in Figures 5 and 6. In Figure 5 the groove is shown in normal position with its walls vertical and the groove of relatively less cross sectional area. In Figure 6 the portion is shown when the foot is in bent position as in walking. There the groove is expanded by the general curving ofv the section and air is thereupon drawn into the groove cavity. As has been stated, Figure 2 shows the downward movement of the'foot with the corresponding compression of the grooves whereby the air is forced into and through means for permitting air to flow from below the insert to above the insole, .e. g. perforations to the foot area. The perforations can be placed in any desired position so long as they afford communication between the grooves on the bottom of the. insole and the shoe interior above the insole.

Referringf now again to Figure 1, the stitching II secures the leather edge member to the resilient material 8 through the flap I2. This flap construction is such as to provide a tapering away of the thickness of the insole at the edges thereof. Thus, the center portion of the insert 8 is thicker than the combined thickness of lap I2 and insole 1 (Figure 4) and 'a desirable ball cushion support for the foot is obtained. Another feature is the location of the stitching II immediately adjacent the point I3 where the main body of the resilient material contacts the leather edging. By positioning stitching at that point I provide against the separation of the resilient material from the leather edging and at the same time provide greater flexibility 'for the assembly. This position immediately adjacent this point I3 is of particular importance because if the stitching were placed near the edge of the flap as it normally would be, there would be con-- leather edging, but it also secures the parts against any lateral displacement and further holds the rubber ap extension down against the leather edge.

This construction is of further importance in that it prevents any separation of the parts at. what isin Figure 5, the bottom joint of insert and insole. If separation occurred here dirt or scraps might conceivably enter therebetween which might interfere with the proper resiliency of the insole. This is particularly applicable when the` rubber ap extends across the bottom of the leather instead of at the top, namely the reverse of what is shown in Figures 1 to 5.

At the rear of vthe resilient portion there extends the stii'material I6 of the shank of the insole which is, for example, leather or the like. The 'resilient material also extends toward the 'rear and is in the form of a thicker portion which forms a metatarsal support I1. 'I he metatarsal also has .perforations I8 therein for breathing purposes.

in the forepart and rear, extensions 25, 21 and 28 molded integrally therewith which are adapted to enter suitable recesses 29 and 30 in the toe stiiening piece 3| and the portion 20 respectively in order to secure a positive andaccurate en'- gagement therewith. The engagement'is effected -by inserting the toe piece 3| between the flaps in such a way that the projections and 26 ride into the opening 29 in'the indicated portion of the toe piece and similarly inserting the shank vportion 20 between the'double flaps so that the y projections 21 and V28 rideinto and lengage recess -in the shank portion.

The side stiffening members 33 and 34 are inserted between the aps 22v and 23 at the sides of the insole and then suitable rows of stitching and 36 secure the respective stiffening mem-- bers and shank portion to the resilient forepart vform of my invention, wherein refers to the shank of the insole and 5| to the resilient portion of my insole. The resilient portion isfformed with an outwardly extending ilap at the sides and frontl portion and a double flap at the rear by reason of the metatarsal support molded integrally therewith on the-top. The resilient flap is indicated in the vtoe portion as 52, at the sides `as 53'and the rear as 54. The added metatarsal supportis 55.

As will be noted from the sections shown ln Figures 12, 13 and 14, the ilap is only 'a portion of the thickness of the resilient main portion itself, the stiff leather portion 56 being of such i l thickness as to be flushwith the top of therecured thereto by stitching 62 and 63. It is togv silient insert. .56 is the Vtoe stiifening portion, it being necessaryto have a fairly stiff area at the toe section of the insole. This toe stiffening portion 56 and av recess 51 into which extends the projection 58 which is shown molded integrally with `the flap 52. Side reinforcing members 60 and 6| similarly lie over the viiap 53 and are sebe noted that the line of stitching 63 'is immediately adjacent the Ajunction of the insert 5| 'and the stifening member 60 so that there canbev no gap even under stress `at that point. Such gapping wouldmean pinching 'of the sock lining with consequent wrinkling. A To effect the joining of the shank 50 to the resilient portion, I provide a projection 65 shown vmolded integrally with the flap 54, which projecwhich have the tion 65 nts into a recess 66 in the shank portion 50. As described hereinbefore, the resilient portion is provided with forced breathing grooves 68 and adjacent perforations 69 having bosses 10 atthe bottom thereof.

Referring now to Figure 15,. I show a still further modied form of my invention in which I provide a shank portion 15 and a resilient forepart portion 16 which has a single centrally extendingA flap 61. The toe stiffening portion 18 comprises an upper layer 10 and a bottom layer 00 `of the shape shown at 18 which fit on each side of the centrally extending ap of the resilient portion and which layers have openings 8| and 82 into which projections 83 and 84 of the .centrally extending flap which are molded integrally with the flap, project. Similarly the side reinforcing members comprise an upper ,stiffening member` 85 and a lower stlffening member 86 on each side ofrthe centrally extending flap 61.

To facilitate the joining of the resilient portion to the shankiportion 15, I provide a centrally extending flap 88 having two side projections 89 which t into corresponding openings in the fiaps'90 and 9| of the shank portion 15. Extending from the resilient portion is a metatarsal support 92. In the main part vof the resilient 4portion are grooves 95 and adjacent thereto are perforations 06 having on -the bottom thereof bosses 81.

vMy invention includes a size pad which may have on its lower surface the grooves which were described hereinbefore in connection with the resilient, insole, and the size pad may also have pad preferably has a feather edge about its-pe- 5 riphery. It may or may not have integrally therewith metatarsalsupport. e

Referring now to Figure 19 I show still another form of my invention in which the resilientportion |00 is bound around the edges with a stiff'.

material |0| which may be leather or any suit@` able stiff material of that nature. The resilient insole here is cut down at the edge as shownat |02 so that the binding |0| lies ush with the resilient portion |00.

The shank portion |03 is joined to the resilient forepart by means of the fitting of the projection |04 of the resilient portion into the opening |05 in the shank portion and the stitching |06 and |01 secures said resilient portion to said stii shankportion.v vThe stitching `llllsecures thc stiffening material |0| to the resilient portion |00 and here only a sigle row is required. This is a particularly' effective method for providing a resilientforepart with the stiff edge `portion that is necessary for receiving and holdingthe stitching when the shoe is assembled. In the main portion of the resilient material are-grooves 'and adjacent perforations ||2 having bossesv ||3 thereon.

Referring now generally to the constructions I have shown throughout these drawings, itis to be noted that itis desirable that'the center part of the resilient forepart is of greater thickness than the peripheral portions thereof. .This is 'to 75 5 because they provide a positive means for securing the insert to thev insole, but also because they provide for a means for decreasing the thickness from the center to the periphery.

As can be noted, I have shown a number f immodifications of my invention whereby I can pro-v vide an insole with the resilient forepart portion and stii toe, side and shank members in firm union therewith. The various forms of my invention which I have set forth provide for quick as- 15 sembly and this is especially an improvement over the form in which a leather insole has a cut out portion in the middle of the forepart thereof and an insert placed therein.

In Figure 24 I show in perspective the various go stilening elements comprising the toe' stiening member H and the side stiffening members H6 and II'I and the shank portion II8. The particular way in which these stiffening members can be united to the resilient portion have been g5 set forth in detail in Figures 7 to 18.

Although I have shown the side stiifening members IIB and l l1 separated from the shank portion H8, it is to be understood that they could be integral therewith, in which case the 30 resilient material is inserted therebetween and it merely remains for the toe stiffening portion I|5 to be united with the resilient portion. Openings H9 and I 20 in the toe stiiening member and shank portion respectively are for the 35 purpose of receiving suitable projections which may be molded into the resilient material so that a positive and accurate engagement is effected between the various parts.

Similarly I may provide means for engaging the n side stifening elements with the resilient central forepart area. To do this, I may, for example, provide projections molded with the aps of the resilient forepart area, which projections -are adapted to engage corresponding recesses in the 6 side stiffening members. 'I'his provision for locking engagement between the various stiiening elements and the resilient material is of importance both because it provides speed of operation in assembly of thel various parts, in that w the operator can quickly insert a stiienlng part, such as the toe stillening member, and by fitting the recesses therein with the projections on the resilient material, may determine the proper positioning of that toe stiiening element without u delay.

Similarly with the side stiffening elements and the shank portion. In addition to accelerating the assembly operations, this construction also provides for more positive engagement of the no various units of my assembly so that before or after the stitching which permanently secures the various parts together, there can be no displacement of the parts with respect to one another. It is obvious that such a displacement 65 would be a serious matter in that it would cause interruption in the operations and produce rejects.

As can be seen,- I have exampled a number of different constructions by means of which the 70 periphery of the resilient forepart area. of. my insole may be so reinforced as 'to enable it to receive the necessary stitching. I have exampled these particular constructions to exemplify my invention and do not wish to limit myself to the u vparticular constructions shown.

It will be noted that 'the metatarsal support which I provide is molded integrally with the resilient material and lies on a flap which rests on the stiff shank portion. This may be seen in Figures 10, 14 and 18 to 20, as well as the plan 5 views corresponding thereto.

In my construction, by providing the forced breathing over the entire forepart area of the foot as well as the cookie which is in the arch area, when such is employed, I provide a well ventilated shoe that effectively and economically solves the problem of shoe ventilation. Specically, the spaced transverse grooves provide a great bending flexibility for the insole because of the obvious physical advantages involved and the 16 v bosses on the bottom of the perforations provide a spring effect which is of deiinite advantage for obtaining good walking properties. The perforations play their part in providing for greater softness and compressibility for the resilient 20 forepart itself.

Although I have exampled a number of specific constructions it is understood that these constructions are by way of example of the principles of my invention only and that I intendto be limited not by the speciiic constructions shown but only by the claims here appended.

1. In combination, aninsole, an opening in the forepart of said insole, aninsert of rubber-like material disposed in said opening, said insert having a relatively thick central portion and a relatively thin peripherally extending lap portion, said relatively thick central portion extending through said opening in said insole, said relatively thin peripherally extending lap portion being disposed over the portion of the insole adjacent to said opening, said extending lap portion being secured to said portion of the insole adjacent said opening, said central portionof said w insert being relatively thicker than the combined thickness of the insole and the peripherally extending lap portion to provide a ball cushion support, grooves located in said relatively thick central portion of said rubber insert, said grooves a being substantially rectangular in cross-section, the walls of said rectangular grooves being spaced apart from one another, and means for permitting air to ow from below said insert to above said insole.

2. In combination, an insole, an opening in the forepart of said insole, an insert of rubber-like material disposed in said opening, said insert having a relatively thick central portion and a relatively thin peripherally extending lap portion,

said relatively thickv central portion extending through said opening in said insole, said relatively thin peripherally extending lap portion being disposed over the portion of the insole adjacent to said opening, said extending lap por- 30 tion being secured to said portion of the insole adjacent said opening, said central portion of said insert being relatively thicker than the combined thickness of the insole and the peripherally extending lap portion to provide a ball cushion support, grooves located in said relatively thick 'central portion of said rubber insert, said grooves having continuous side walls, the sidewalls of said grooves being spaced apart from one another, and means for permitting air to flow from below said insert to above said insole.

3. In combination, an insole, an opening in the forepart of said insole, an insert of rubber-like material disposed in said opening, said insert having a'relatively thick central portion and a 75 relatively thin peripherally extending lap portion, said relatively thick central portion extending through said opening in said insole, said relatively thin peripherally extending lap portion being disposed over the portion of the insole adjacent to said opening, said extending lap portion being secured to said portion of the insole adjacent said opening, said central portion of said insert being thicker than the combined thickness of the insole and the peripherally extending lap portion to provide a ball cushion support, grooves located in said relatively thick portion of said rubber insert, said grooves being substantially rectangular in cross section, the side walls of said rectangular grooves being spaced apart from one another, said grooves extending transversely across said relatively thick central portion, and perforations in said relatively thick central portion.

4. In combination, an insole, an opening in the forepart of said insole, an insert of rubberlike material dispos'ed in said opening, said insert having a relatively thick central portion and a relatively thin peripherally extending lap portion, said relatively thick central portion extending through said opening in said insole, saidA relatively thin peripherally extending lap portion beingv disposed over the portion of the insole adjacent to said opening, said extending lap DOrtion being secured to saidv portion of the insole adjacent said opening, grooves located in said relatively thick central portion of said insert, said grooves being substantially rectangular in cross section, the side walls of said rectangular grooves being continuous and spaced apart from one another, said grooves extending substantially transversely across said relatively thick central portion, the lateral walls of said grooves being adapted to move away from and toward each other during walking to pump air from said grooves, vand perforations in said relatively thick central portion, said perforations being positioned to transmit air from said grooves to the interior of the shoe.

5. In combination, an insole, an opening in the forepart of said insole,l an insert of rubberlike material disposed in said opening, said insert having a relatively thick central portion and a relatively thinperipherally extending lap portion, said relatively thick central portion extending through said opening in said insole, said relatively thin peripherally extending lap portion being disposed over the portion of the insole adjacent to said opening, said extending lap portion being secured to said porti`on of the insole adjacent said opening, said central `portion of said insert being relatively thicker than the combined thicknesses of said insole and said peripherally extending lap portion and tapering down to provide a ball cushion support, grooves located in said relatively thick portion of said rubber insert, said grooves being substantially rectangular in cross section, the walls of said rectangular grooves being spaced apart from one another, said grooves extending substantially transversely across said relatively thick central portion, the walls of said grooves being adapted to move away from and toward each other during walking to pump air from said grooves, and perforations in said relatively thick central portion,- said perforations being positioned to transmit air from said grooves to the interior of the shoe.

6. In combination, an insole, an opening in the forepart of said insole, an insert of rubber-like material disposed in said opening, said insert having a relatively thick central portion and a relatively thin peripherally extending lap portion, said relatively thick central portion extending through said opening in said insole, said relatively thin peripherally extending lap portion being disposed over the portion of the insole adjacent to said opening, said extending lap portion being secured to said portion of the insole adjacent said opening, said central portion of said insert being relatively thicker than the combined thickness of the insole and the peripherally extending lap portion to provide a ball cushion support, grooves located in said relatively thick central portion of said rubber insert, said grooves being substantially rectangular in `cross section, the walls of said rectangular grooves being spaced apart from one another, the ends of said grooves being closed, and means for permitting air to iiow from below said insert to above said insole.

7. In combination, an insole, an opening in the` forepart of said insole, an insert of rubber-like material disposedin said opening, said insert having a relatively thickcentral portion and a relatively thin peripherally extending lap portion, said relatively thick central portionvextending through said opening in said insole, said relatively thin peripherally extending lap portion being disposed over the portion of the insole adjacent to said opening, said extending lap portion being secured to said portion of the insole adjacent said opening, grooves located in said relatively thick central portion of said insert, said grooves being substantially rectangular in cross section, the side walls of said rectangular grooves being continuous and spaced apart from one another, said grooves extending substantially trans-A forepart of said insole, an insert of rubber-like material disposed in said opening, said insert having a relatively thick central portion and a relatively thin peripherally extending lap portion, said relatively thick central portion extending v through said opening in said insole, said relatively thin peripherally extending lap portion being disposed over the portion of the insole adjacent to said opening, said extending lap portion being stitched to said portion of the insole adjacent said opening, said central portion of the said insert being relatively thicker than the combined thickness of the insole and the peripherally extending lap portion to provide a ball cushion support, grooves located on the bottom of said relatively thick central portion of said rubber insert, said grooves being substantially rectangular in cross section, the walls of said rectangular grooves being spaced apart from one another, and means for permitting air to iiow from below said to above said insole.

MEYER MARGOLIN.

8. In combination, an insole, an opening in the

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