US2255353A - Insole and method of making the same - Google Patents

Description

.Sept. 9, 1941.

5. M mswou:

' INSOLE AND METHOD OF MAKING THE SQME 7 Filed Au 25, 1939 2 Sheets-Sheet 1 .IIIIIIIIIIII Sept. 9, 1941. s. M. G RISWOLD' INSOLE AND METHOD OF MAKING THE SAME Filed Aug. 25, 1939 2 Sheets-Sheet 2 TigB.

Patented Sept. 9, 1941' INSOLE AND METHOD OF MAKING THE SAME Stanley M. Griswold, Newton, Mass., assignor to B. B. Chemical 00., Boston, Mass., a corporation of Massachusetts Application August 25, 1939, Serial No. 291,939

26 Claims.

A. E. Johnson, in which a leather insole is pro-,

vided with outside and inside channels the flaps of which are turned up and cemented together, the insole being then reinforced with a layer of 'canvas which covers the area of the insole inside the rib and extends to the top of the rib.

This all-over canvas reinforcement adds considerably to the cost of the insole and I have discovered that results equally as good, so far as strength and durability of the insole are concerned and which represent a very substantial saving in cost, may be obtained by confining the reinforcement to the inner face of the rib and to the adjacent surface of the insole. This may be done, for example, by providing a strip of canvas of indefinite length which preferably is square cut as distinguished from bias cut and secured to the rib and body of the insole with pressure-responsive cement so that the strip extends widthwise from the base of the rib inwardly, preferably beyond the inside channel far enough so that there will be no danger of its edge being caught by the needle of the Welter, and the other portion extends from the base of the rib substantially to the top thereof but not beyond the top so that no trimming of the strip is necessary.

Advantageously the reinforcing material may be laid first along one side of the insole and then along the other side without attempting the dimcult and unnecessary operation of laying the strip around the toe end of the insole. A strip may he laid along one side of the insole from the toe end toward the breast line, the end of the strip being preferably allowed to extend beyond the rib at the toe end of the insole and cut off substantially at the breast line. Then a strip is laid along the other side of the insole from the breast line toward the toe end of the insole and may be carried slightly beyond the toe end of the insole before it is cut ofi so that its end extends across the end of the previously laid strip. The rib at the toe end of the insole, where it is usually weak, is thus reinforced by two layers of canvas where the strips cross each other.

I regard as a new article of manufacture an insole thus reinforced along each side by a separate strip, the strips extending to the toe end and preferably overlapping to provide a double reinforcement at the toe.

In the practice of my improved method of laying the strip on the insole the margin of the insole and the outer face of the rib are supported and the insole continuously fed past an operating point, at which point one marginal portion of the strip is forced against the body of the insole, and the other marginal portion of the strip is pressed against the inner face of the supported rib.

In laying the marginal portion of the strip against the body of the insole, it is very important to prevent the strip from moving laterally with respect to the applying instrumentalities since this would vary the width of the marginal portion applied to the rib; and, since the marginal portion applied to the insole must be bent laterally to follow the curves of the rib, it is especially important that different lateral portions of the margin of the strip thus applied to the body of the insole correspond in length to the length of the insole surface to which they are applied. That is, the portion of the strip which is applied to the body of the insole may be regarded as divided into parallel zones extending lengthwise of the strip, and it is desired to cause the length of each zone to correspond to the length measured on the insole to which that zone is applied notwithstanding the lateral curving of the strip to follow the curves of the rib. This control of the strip is effected by an applying roll provided about its periphery with a series of spurs long enough to pass through the strip but which need not be long enough to engage the body of the insole because the strip sticks to the insole when it contacts therewith.

It will be seen that when one marginal portion I of the strip is being laid against the body of the insole by an applying roll thus constructed the length of the zone applied by each lateral portion of the roll will correspond to the distance traveled by said portion in contact with the insole and since, because of the spurs, there can be no movement of the strip relatively to the roll except in the direction of the spurs, this will be true as the applying roll follows the curve of the insole rib. For example, in rounding a curve which is convex with respect to a point on the interior of the insole, the lateral portion of the roll carrying the inner zone will traverse a longer line on the insole body than the lateral portion of the roll which applies the zone at the base of the rib and, of course, the length of the zone of the strip applied by that lateral portion of the roll will be less than that applied by the firstmentioned lateral portion of the roll. This action of the applying roll consists in treating (stretching or compressing) various zones of the fabric strip to make them correspond in length to the lengths on the insole to which they are applied.

Another important aspect of the invention relates to a method of handling the strip to cause the strip to line the angle between the inner face of the rib and the body of the insole. In accordance with the method, the portion of the strip which is to be laid against the insole rib is first bent in a direction opposite to the direction of feed. It is then carried over an edge adjacent to the applying roll by which its direction is changed so that it extends horizontally and parallel to the inner face of the rib.

Other aspects of the invention relate to the treatment of the strip in various ways for the purpose of stiffening it to form a firmer rib and for the purpose of protecting the cement bond between the strip and the insole from the action of the binder used in the usual shoe filler or both.

In a further aspect the invention relates to heat treatment of the strip as it is applied for the purpose of enhancing the cement bond whether the strip is stifliened or not and, if stiff.-

ened, to render it temporarily limp to facilitate its application to the insole.

These and other aspects of the invention will appear more fully from the following detailed description when read in connection with the accompanying drawings and will be pointed out in the appended claims.

In the drawings,

Fig. 1 is a perspective view of a welt insole (that is, an insole for use in the manufacture of a welted shoe) the rib of which has been reinforced along one side by a strip of canvas in accordance with the present invention;

Fig.2 is a similar view showing the insole of Fig. 1 with a reinforcing strip applied also along the other side of the insole, the second strip overlapping the first strip at the toe end;

Fig. 3 is a fragmentary detail of the toe end of the reinforced insole after the reinforcing strips have been formed in at the toe end where .they

cross;

Fig. 4 is a front elevation of apparatus for applying the strip to the insole, the insole being shown in section;

Fig. 5 is a side elevation, partly in section, the apparatus taken from the right of Fig. 4;

Fig. 6 is a rear elevation, partly in section, of the apparatus shown in Fig. 4;

Fig. 7 is a perspective view of the apparatus shown in Fig. 4 taken from a point toward the rear, the upper feed roll being omitted;

Fig. 8 is a vertical section through the apparatus shown in Fig. 7 including the upper feed roll; and

Fig. 9 is a view of the strip illustrating the manner in which it is presented and manipulated in applying it to the insole.

In practising the method of the present invention, a ribbed insole is provided which may be a leather insole l having inside and outside channels the flaps of which are turned up and cemented together to form a rib l2, which rib is to be reinforced on its inner face by a. canvas strip l4 applied by the present novel method to the inner face of the rib l2 and to the a ja en body portion of the insole. Of course the invention is not limited to the particular manner of forming the rib since insoles having ribs formed in various ways may be reinforced in accordance with the present method. The inner face of the rib l2 and the adjacent portion of the body of the insole are preferably coated with pressureresponsive cement such as water-dispersed rubber cement, for example latex, and one face of the reinforcing strip I4 is similarly coated, the coatings being allowed to dry. The coated face of the strip I 4 is then laid along the inner face of the rib l2 and against the body of the insole,

first along one side of the sole, for example from the toe end toward the breast line It, the strip at the toe end being preferably allowed to extend slightly beyond the toe end of the insole, as illustrated in Fig. 1. A strip IB is then applied along the other side of the insole, as shown in Fig. 2, preferably from the breast line I6 forwardly toward the toe, the strip pr'eferably being allowed to extend slightly beyond the rib at the toe before it is severed. Thus, the toe end of the second strip I8 is laid over the toe end of the first strip l4, and the rib I! at the toe end of the insole is reinforced with two thicknesses of the strip, this being particularly desirable since at the toe end the rib formed by the usual channel flaps is aptto be fragile. This procedure results in the end of the second strip being laid over the end of the first strip always in the same direction and since the waiting machine operator always starts sewing at the breast line with the toe of the shoe toward his right, whether the shoe is a right or a left, the channel guide of the welter will pass over the lap of the strips at the toe in the same direction in which the second strip was laid and will not catch on the end of the strip.

For applying the strips [4 and I8 to the insole Ill apparatus such as that illustrated in Figs. 4, 5, 6, 7 and 8 may be utilized. When so used the insole is supported by a feed roll 20 and a table 22 adjacent thereto. The rear portion 23 of the feed roll 20 is frusto-conical with a rearward taper (Figs. 5, '7 and 8). Cooperating with the feed roll 20 is a second feed roll 24 having a frusto-conical portion 25, the lower part of which is substantially parallel to the adjacent upper part of the conical portion 23 of the feed roll 20. The feather portion of theinsole is introduced between the rolls and the rolls are pressed together, the rolls being positively and continuously driven to feed the insole. As shown in Fig. 5, the cooperating conical surfaces 23 and 25 of the feed rolls bend the feather portion of the insole toward the inner or foot-engaging face of the insole to cause the rib to assume an upright position nearly perpendicular to the body portion of the insole. In order to insure-a positive and continuous feed of the insole, the lower feed roll may be covered with friction material such as rubber, as illustrated in Fig. 8.

The outer face of the rib of the insole is supported by the end face of the feed roll 24, which face is formed partly by the head of a screw 26 by which the feed roll 24 is secured to its shaft. The head of the screw and the end of the feed roll are formed as a flat cone, the lower part only of which engages the rib and supports it with its inner face substantially perpendicular to the body of the insole. Since it is highly desirable, to facilitate inseaming operations, that the rib of the insole have an inward inclination or at least that it be not inclined outwardly,

preferably, and as illustrated, is composed of a the lips forming the rib are usually initially set in an inwardly inclined position. The action of he feed rolls, however, is to bend down the feather of the insole and cause the rib to assume during the strip applying operation a position substantially perpendicular to the body portion of the insole. After the strip applying operation, however, the leather reacts and the rib tends to assume its initial position.

The strip material utilized for reinforcing the insole is preferably made by cutting Gem duck into strips of the required width, the out being made parallel to the warp or woof and preferably to the warp since in this way the strip material may be produced very cheaply and the filling threads which are usually stronger than the warp threads will extend transversely of the strip, that is, they will extend in the direction whichwill afford the greater reinforcement for the insole lip and inseam. It is not necessary to have the strip material cut on the bias in order to be readily applied to the insole by the present method. I

The strip material is coated on one face with a pressure-responsive cement such as water-dispersed rubber cement, for example latex, and the cement allowed to dry, whereupon the strip material may be done up in rolls of indefinite length without danger of contacting portions of the material adhering to each other. Such a source of strip material is indicated at 21 (Fig. 4). From the source of supply the strip may be led toward the insole in a direction substantially normal, that is, at a' substantial angle to the part of the body of the insole against which it is laid, whereby the strip will contact with a substantial portion of the periphery of the applying roll, the strip adjacent to the roll passing through a guide formed between a small plate 28 (Fig. 4) and a larger plate 29. It is desirable, as the strip passes through the guide, that a marginal portion 30 thereof be bent toward the right as viewed in Fig. 4, that is toward the direction from which the insole is fed or opposite to the direction of feed. Accordingly, the portion of the guide 28, 29 which engages the marginal portion 30 of the tape is bent in a direction opposite to the direction of feed and the strip, as it approaches the insole, will have the marginal portion 30 bent with respect to the marginal portion 32 toward the right as shown in Fig. 4. As the marginal portion 30 leaves the guide it is carried around a curved edge 34 (indicated by a dotted line in Fig. 6) preferably formed on the plate 29 forming a part of the guide. As the marginal portion 30 is carried around the edge 34 it assumes a position in which it extends parallel to the inner face of the rib l2.

This handling of the strip may be better understood from Figs. '7 and 9 where the numerals 30 and 32 indicate the vertical portions of the strip as it passes through the guide toward the insole and the numerals 30', 32' (Fig. 9) indicate, respectively, the portions 30, 32 of the canvas strip after they have been brought into position to be applied to the insole.

As herein illustrated, the portion 30' is applied to the inner face of the rib by a rubbing action and the portion 32' is applied to the body of the insole mainly by a rolling action, and for this purpose the apparatus best shown in Figs.

7 and 8 is utilized. This apparatus comprises an applying roll indicated generally by the reference character 36 which may be in one p1ece but plurality of disks, for example the three disks 38, 40 and 42. These disks are mounted for free rotation upon a stud 46 secured at 48 to an applying-roll carrier 50 which is pressed toward the insole by any suitable means. The stud 46 has a head 52 as large as the adjacentdisk 42, the head being thickened on its lower side to form a lip 54 (Fig. 8) which runs in the angle between the rib l2 and the body of the insole and rubs the marginal portion 30' of the reinforcing strip against the inner face of the rib while the outer face of the rib is supported by the conical end face of the feed roll 24 (Fig. ,8). The lower edge of the head 52 acts to rub a' narrow portion of the strip against the body of the insole at the base of the rib. The applying roll 36, including the lip 54, is urged toward the inner face of the rib by means of a spring-56 (Figs. 5 and '7) and thus the rib of the insole and the portion 30' of the reinforcement are held between the conical end face of the feed roll 24 and the lip 54 in a position substantially perpendicular to the insole.

Control of the strip to insure that the width of the marginal portion 30 will correspond to the height of the rib so that notrimming will be necessary, and particularly control of the portion 32 to cause it to follow reverse curves found at the base of the insole rib, is very important and is attained in accordance with the present invention by preventing movement of the strip with respect to the applying roll except in a direction radial of and away from the roll. For this purpose each of the disks composing the roll is provided about its periphery with a. series of fine spurs 44 which may be only long enough to pass through the strip and serve to prevent any lateral movement of the strip with respect to the roll as a whole. The portion of the strip laid against the body of the insole may be considered as divided laterally into as many zones extending lengthwise of the strip as there are disks, each zone corresponding in width to the width of the disk engaged by it. Each disk, by pressing its zone against the insole, causes it to adhere to the insole and become immovable with respect thereto. Some of the spurs on each disk engage the portion of the strip which is fast to the insole and thus each disk is geared to the insole. At the same time, since each zone of the strip extends about the periphery of the disk for approximately of its circumference and is impaled by the spurs thereon, each zone is geared to the disk which engages it. Thus each disk prevents movement with respect to the disk of that zone of the strip which is in engagement with that disk. This causes a controlling action of the roll upon the strip the effect of 'which is that when the portion 32 of the strip is being laid adjacent to a curved portion of the insole rib the length of the zone of the strip laid by the disk 42 will correspond to the distance traveled by that disk, the length of the zone laid by the disk 38 will correspond to the distance traveled by that disk, and the length of the intermediate zone laid by the disk 40 will correspond to the distance traveled by that disk. For

example, as the strip is being applied along the curved portion of the rib such as C in Fig. 2, the disk 38 will travel farther than the disk 42, but since the strip cannot move relatively to the disk the length of the zone of the strip applied by the disk 38 must correspond to the distance traveled by that disk, and the length of the zone applied by the disk 42, which of course travels a less distance, must correspond to the less distance traveled by that disk, the disk 40 applying a zone of intermediate length to anintermediate distance. In going about a concave portion such as that at C (Fig. 2) the conditions are, of course, reversed, the inner disk 38 then traveling a less distance than the outer disk 42. In any case, however, the length of the zone of-the strip applied by each disk corresponds to the distance the disk travels. The strip is distorted (i. e., stretched or compressed) to permit the operation to be carried out substantially as above explained.

When the rib l2 of the insole is formed in part by the lip of an inside channel as illustrated, it is desirable so to form the applying roll that the strip 32 will be forced down into the channel at the base of the rib as well as against the body portion of the insole adjacent to the channel. Accordingly, the disk 42 is formed with a portion of greater diameter so that the edge face of this portion will force the strip into the recess formed by turning up the flap of the inside channel. Also, the diameter of the head 52 is made equal to that of the larger diameter of the disk 42 for the same purpose. Referring to Figs. 4, '7 and 9, it will be seen that the applying roll 36 lies between the vertical part 32 and the hurl-- zontal part 32' of the strip of fabric, transition of the strip from one position to the other being effected by its passage around a substantial portion of the periphery of the applying roll, and that the pressure of the applying roll against the portion 32 as it assumes its horizontal position causes that portion to adhere to the body of the insole. At the same time the edge 34 of the plate 29 attached to the guide 28 lies between the vertical part 30 of the strip and the horizontal part 30 where they overlap each other and causes the transition of the marginal portion 30 from its vertical position, bent to extend opposite to the direction of feed of the insole, to its upwardly bent horizontal position 30 parallel to the rib. This transition is made just in advance of the applying roll; therefore, there is no opportunity for the cemented side of the marginal portion 30' to engage any cemented surface of the insole before or during its transition around the edge 34 from the vertical to the horizontal position. When it reaches this position it engages the cemented inner surface of the rib and adheres thereto.

The strip should be maintained under some tension as it passes from the supply roll 21 to the applying roll 36 and, as shown in Figs. 4 and 7, this tension may be produced by a leaf spring 58 arranged to be pressed by a screw 60 against the strip where the strip passes over the plate 29 before it enters the guide 28.

It is advantageous to bend the insole l downwardly as it leaves the roll 20 (Fig. 4), thus giv-' ingv the insole a longitudinal curvature which overcomes the tendency of the strip, due to its being laid under tension, to contract and bend the insole in the opposite direction. This downward bending of the insole also enables it to conform readily to the longitudial curvature of the last bottom and lie closely against it, the lasting of the upper over the insole being thus facilitated.

In order that the reinforced rib may be sufficiently stiff to withstand the pull of the lasted upper without bending outwardly to any substa tial extent, it is desirable, particularly when duck or canvas of a light weight is employed from which to form the reinforcing strip, to apply stiffening material to the strip or to the web from which it is made. The stiffening of the material may be done either in the Web or in the strip, the stiffening material employed being preferably a gum such as dammar, copal, cumaron or Nuba. Solutions of these gums may be employed to treat the strip material. The stifiening solution does not penetrate sufficiently to affect the bond of the cement to the fabric. The gum solution not only serves to stiffen the fabric but also protects the cement bond between the strip and the insole from being affected adversely by the binders used in making filler materials such, for instance, as the wax tailings so frequently employed in fillers. For stiffening the strip material I prefer to use a gum sold under the name Nuba by the Neville Company, of Pittsburgh, Pennsylvania, not only because it is cheap but because it has been found to be very suitable for the purpose. Nuba is obtained as a residue of the distillation of coal tar and belongs to the aromatic series. Nuba may also be described as a thermoplastic coal, tar pitch. Nuba, of the grade employed, has a melting point between and C., is thermosoftenlng, tough, elastic, and readily soluble in benzol and naphtha, the following formula having been found satisfactory:

. Per cent Nuba '70 Benzol 15 Naphtha l5 Cumar gum or cumaron resin is also effective Soy-bean protein grams 100 Ammonia cubic centimeters 10 Urea grams 30 Water cubic centimeters 860 Cellulose derivatives may also be employed as a stiffening agent; for example, 20 parts of cellulose acetate or cellulose nitrate may be dissolved in 80 parts of methyl acetone, and a suitable plasticizer for the cellulose derivative such as dibutyl phthalate added in a small proportion.

Any of the above suggested materials will serve as stiffening material for the strip and hence for the rib of the insole and will protect the cement bond between the strip and the insole from being adversely affected by the binder in the filling material which is applied to the insole.

Preferably one of the above stiffening solutions, for example the Nuba solution, is first applied to a web of fabric such as Gem duck, after drying, the fabric is coated with latex and dried. The web is then cut lengthwise of the warp into strips of suitable width, each strip being made into a 'roll of suitable siZe to be handled by the abovedescribed apparatus. In the strip thus made the warp extends, of course, lengthwise of the strip and the woof or filling extends transversely of the strip. Since the filling threads are stronger than the warp threads, this provides a strip of greater transverse than longitudinal strength which is of advantage since the greatest strain on the reinforcing fabric, when in use, is transversely of the strip. This advantage obtains, of course, whether the strip is stiffened or not.

To enable the stiffened strip material to be conveniently handled in accordance with the method of the present invention and by the apparatus described, it is desirable to heat the strip to render it temporarily limp and flexible to enable it to be laid upon the insole. For this purpose a heating device 62 (Fig. 4) is provided which is arranged above the guide 28 in close proximity to the strip so that the strip, before it reaches the applying roll, will be heated and rendered limp. The heating element 62 is preferably electrical and of such wattage that as the strip passes close to it but without contact therewith it will be heated by radiation to a temperature of approximately 250? F. In order that the heated strip may not be chilled by the applying r011 36, another heating element 64 may be secured to the support of the applying roll so that it will be heated by conduction, thus insuring that the strip when handled by the applying roll will be in a limp condition.

Either or both of the heating elements 62, 64 may be advantageously employed whether or not the reinforcing strip is impregnated with thermoplastic material, it having been found that the bond of the strip against theinsole produced by the latex cement is considerably enhanced if the strip is applied to the insole in a heated condition.

The novel reinforcing strip referred to herein is claimed in my application Serial No. 404,299, filed July 28, 1941.

Apparatus for practicing the herein-disclosed method is disclosed and claimed in Griswold and Nash Patent No. 2,242,248, granted May 20, 1941.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. An insole having an upstanding rib and a reinforcing narrow strip along each side of the insole extending from the breast line to the toe end, one portion of each strip being secured to the body of the insole and another portion of each strip to the inner face of the rib, said strips extending to and overlapping each other at the extreme toe end of the insole doubly to reinforce the rib where the strips overlap.

2. An insole having an upstanding rib and a narrow reinforcing strip along each side of the insole extending from the breast line to the toe end, one portion of each strip being secured to the body of the insole and another portion of each strip to the inner face ofthe rib, said strips extending to the toe end of the insole and having their toe ends laid one upon the other.

3. An insole having an upstanding rib and having the inner face of the rib and the adjacent portion of the body of the insole reinforced by narrow strips of fabric out from the web parallel with the warp, each strip extending from the breast line to the toe, the toe portion of one strip being laid over the toe portion of the other strip to afford a double reinforcement for the rib.

4. An insole for welt shoes comprising a body portion having a rib formed thereon, said rib. being reinforced with a narrow strip of fabric impregnated with thermoplastic stiffening material, one marginal portion of said strip being secured to the body of the insole and the other marginal portion secured to the inner face of the rib by rubber cement applied to the impregnated strip.

5. An insole for welt shoes having a body portion provided with a sewing rib, and fabric reinforcing strips extending from the breast line to the toe at each side of the insole, said strips containing stiffening material and having one marginal portion attached to the body of the insole and the other marginal portion to the inner face of the rib, said strips overlying each other at the toe end of the insole to form a double reinforcement for the rib.

6. An insole for welt shoes comprising a body portion having a rib formed therein, said rib along eachside of the insole being reinforced with a strip of fabric impregnated with thermoplastic stifiening material, one marginal portion of each strip being secured to the body of the insole and the other marginal portion secured to the inner face of the rib, said strips being disposed one over the other at the toe end whereb the rib at the toe is doubly reinforced.

7. An insole for welt shoes comprising a body portion having a rib thereon, said rib along each side of the insole being reinforced with a strip of fabric, one marginal portion of each strip being bonded with latex cement to the body portion and the other marginal portion being bonded with latex cement to the inner face of the rib, saidstrips being impregnated with a thermoplastic material to prevent the action of shoe filling material from adversely affecting the cement bond between the strip and the insole.

8. That improvement in methods of treating insoles which consists in laying a strip of material along a line at a predetermined distance from the curved edge of an insole, and positively controlling zones of the strip so that the length of each zone will be equal to the length of the curve measured on the insole against which that zone is laid.

' 9. That improvement in methods of reinforcing insoles which consists in laying a strip of reinforcing material along the marginal portion of an insole so as to follow the lateral curvatures thereof, and positively controlling the length of several lateral zones of the strip laid along the inside and outside of the curve so that the lengths of the said zones of the strip will be equal respectively to the lengths of the inside and outside of the curve.

10. That improvement in methods of reinforc-v ing insoles which consists in applying a strip of material along a marginal area of an insole substantially parallel to the curved edge thereof, and controlling inner and outer portions of the strip so that the length of the inner portion of the strip will be equal to the length of the inner edge of the area of the insole against which the-strip is laid and the length of the outer portion of the strip will be equal to the length of the outer edge of the area along which the strip is laid.

11. That improvement in methods of reinforcing insoles which consists in providing an insole having an upstanding rib and having pressureresponsive cement on the iner face of the rib and the adjacent portion of the insole, applying one the adjacent portion of the insole, moving the insole continuously, applying one marginal portion of a cemented strip progressively to the inner face of the rib, simultaneously positively controlling the other marginal portion to cause the lengths of various zones thereof to equal the lengths measured on the insole against which they are laid, and laying said zones against the body of the insole.

13. That method of reinforcing insoles which consists in providing an insole having an upstanding rib, applying a reinforcing strip to the body of the insole and to the inner face of the rib in a direction from the toe end of the insole toward the breast line, and then applying a separate strip to the body of the insole and the inner face of the rib on the opposite side of the shoe from the breast line toward the toe, the end of the second strip overlying the end of the first strip.

14. That improvement in methods of reinforcing insoles which consists in providing an insole having an upstanding rib substantially perpendicular to its body portion, supporting the upstanding rib from movement outwardly of the insole, applying a reinforcing strip to the body of the insole and to the inner face of the upstanding rib by forcing one marginal portion of the strip into contact with the body of the insole while positively' restraining it continuously from movement laterally of the insole at its point of application thereto, and pressing the strip into the angle between the inner face of the rib and the body of the insole and against the irmer face of the rib.

15. That improvement in methods of reinforcing insoles which consists in providing an insole having an upstanding rib and having pressureresponsive cement on the inner face of the rib and the adjacent portion of the body of the insole, providing reinforcing material in the form of a strip of indefinite length having pressure-responsive cement on one side thereof, guiding said strip under tension to its point of application to the insole, applying rolling pressure to one marginal portion of the strip to force it into adhesive contact with the body of the insole, and working the trip into the angle and against the inner face of the rib throughout its heightwise extent.

16. That improvement in methods of reinforcing insoles which consists in providing an insole with an upstanding rib, supporting the rib in a position substantially perpendicular to the body of'the insole, feeding the insole continuously, positively restraining a reinforcing strip from movement laterally of the insole, progressively applying the reinforcing strip to the body of the insole and to the inner face of the upstanding rib by forcing one marginal portion of the strip into contact with the body of the insole and pressing the other marginal portion of the strip against the substantially perpendicular inner face of the rib.

1'7. That improvement in methods of reinforcing ribbed insoles which consists in continuously feeding an insole by engagement with the portion of the insole outside of the rib while supporting the rib in an upright position, laying one marginal portion of a strip of material against the body of the insole adjacent to the rib, and simultaneously forcing the other marginal portion against the inner face of the supported rib.

18. That improvement in methods of reinforcing ribbed insoles which consists in continuously feeding an insole by engagement withthe portion of the insole outside of the rib while supporting the rib in an upright position, rolling one marginal portion of the strip against the body of the insole adjacent to the rib, and simultaneously rubbing the other marginal portion against the inner face of the supported rib.

19. That improvement in methods of reinforcing ribbed insoles which consists in continuously feeding an insole past an operating point, supporting the rib, laying one marginal portion of the strip against the body of the insole, simultaneously forcing the other marginal portion against the inner face of the supported rib, and

bending the insole toward its unribbed face as having an upstanding rib, supporting the rib in a position substantially perpendicular to the body of the insole, feeding the insole continuously, heating a cemented strip of reinforcing material, applying the heated strip to the body of the insole and to the inner face of the upstanding rib by forcing one marginal portion of the strip into contact with the body of the insole and pressing the strip into the anglebetween the inner face of the rib and the body of the insole and against the substantially perpendicular inner face of the rib.

21. That improvement in methods of reinforcing insoles which consists in providing an insole having an upstanding rib, feeding the insole, ap-

plying a reinforcing strip to the body of the insole and to the inner face of the upstanding rib by leading the strip toward the insole in a direction substantially normal to the plane of the insole with a marginal portion of the strip bent toward the direction from which the insole is fed, bringing the other marginal portion of the strip into the plane of the insole, and, while pressing said marginal portion against the body of the insole, bending the first-mentioned marginal portion of the strip into a position parallel to the rib and pressing it against the inner face of the rib.

22. That improvement in methods of reinforcing insoles which consists in providing an insole having an upstanding rib and having pressureresponsive cement on the inner face of the rib and the adjacent portion of the body of the insole, providing reinforcing material in the form of a strip of indefinite length having pressureresponsive cement on one side thereof, guiding said strip under tension in a direction perpendicular to the plane of the insole to its point of application to the insole, changing the direction of the strip so that one marginal portion is parallel to the plane of the insole while bending the other marginal portion of the strip into a position parallel to the inner face of the rib, and pressing said marginal portions respectively against the body of the insole and against the rib.

23. That improvement in methods of reinforcing insoles which consists in providing an insole with an upstanding rib and with pressure-responsive cement on the inner face of the rib and the adjacent portion of the body of the insole, presenting a reinforcing strip provided with pressure-responsive cement in a substantially vertical position with respect to the plane of the insole with one marginal portion of the strip bent at an angle with respect to .th remainder of th strip, causing transition of the strip from said position to a position in which one marginal portion of the strip is in a plane parallel to the plane of the insole and the other marginal portion is in a plane parallel to the inner face of the rib, and as the transition progresses pressing said marginal portions respectively against the body of the insole and against the rib.

24. That improvement in methods of reinforcing insoles which consists in providing an insole having an upstanding rib and having rubber cement on the inner face of the rib and on the adjacent portion of the body of the insole, supporting the outer face of the rib, feeding the insole continuously, heating a rubber cemented strip of reinforcing material, and applying the heated strip to the body of the insole and to the inner face of theupstanding rib by forcing one marginal portion of the strip into contact with the body of the insole and another portion of the strip into the angle between the inner face of the rib and the body of the insole and against the inner face of the rib.

25. That improvement in methods of reinforcing insoles which consists in providing an insole having an upstanding rib and pressure-responsive cement on the inner face of the rib and the adjacent portion of the body of the insole, providing reinforcing material in the form of a strip of indefinte length having pressure-responsive cement on one side thereof and impregnated with thermoplastic stiffening material, guiding the strip toward the insole, heating the strip as it approaches the insole, and laying one marginal portion of the strip against" the body of the insole and the other marginal portion of the strip against the-inner face of the rib.

26. That improvement in methods of reinforcing insoles which consists in providing an insole having an upstanding rib and pressure-responsive cement 0n the inner face of the rib and the adjacent portion of the body of the insole, providing reinforcing material in the form of a strip of indefinite length containing stiffening material and having pressure-responsive cement on one side thereof, applying rolling and rubbing pressure to one marginal portion of the strip to stick it to the body of the insole, and applying rubbing pressure to the other marginal portion of the strip to stick it against the inner face of the insole rib.

STANLEY M. GRISWOLD.

Images