US2467384A - Apparatus for applying adhesive - Google Patents

Description

J. S. KAMBORIAN APPARATUS FOR APPLYING ADHESIVE April 19, 1949.

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Filed June 1'7. 1944 Patented Apr. 19, 1949 UNITED s'rmss PATENT OFFICE APPARATUS FOR APPLYING ADHESIVE Jacob S. Kamborian, West Newton, Mass. Application June 17, 1944, Serial No. 540,868

16 Claims.

This invention relates to apparatus for applying fluid adhesive, and more particularly to apparatus designed to apply adhesive simultaneously to two adjacent surfaces, usually disposed in intersecting planes,'in such a way as to leave the surfaces immediately bordering the junction between them free from adhesive. While the invention is of broad utility and the apparatus herein disclosed is useful for applying adhesive simultaneously to adjacent surfaces of various articles, for instance to parts of cardboard boxes or the like, it is specifically illustrated herein, by way of example, as employed in the manufacture of shoes, in particular for applying adhesive simultaneously to the inner surface of a marginal portion or appendage of the shoe upper and to the margin of a sole member assembled with the upper upon a last. For more particular illustration, the shoe is herein shown as of the forcelasted or California type.

Herein, in referring to the manufacture of shoes and to the application of adhesive to the shoe parts, the term shoe upper" is employed broadly and intended to cover the upper, proper, of a shoe of ordinary type, whether such upper comprise one or more plies of material, and also to include such an appendage to the upper, whether integral or not, as the wrapper or platform cover of a California type or forcelasted shoe. Likewise when reference is made to a sole or"sole member, this term is intended in a broad sense and to include such elements as tlie insole, proper, of a shoe of ordinary type whether welt, McKay, or cement lasted; the middle sole of either an ordinary type or a California type of shoe, and the cushion sole or sock lining of the latter type of shoe. While these particular instances of the meaning of upper and sole member" have been given by way of illustration, it is not intended thereby to limit the interpretation of the terms upper and sole member to these particular embodiments.

Whenever it is attempted to apply adhesive to the inner surface of the margin of an upper and to the margin of a sole member assembled with the upper upon a last, the adhesive, whether applied as a spray or by means of a brush, tends to enter the extreme angle between the upper and sole member and to flow down around the peripheral edge of the sole member so that as it sets it firmly unites the upper and sole member in the position which they at that time occupy. When, thereafter, it is attempted to last the shoe, if of ordinary type, or to stress the wrapper of a force-lasted shoe preparatory to laying it down on the sole member, the adhesive union of the parts strongly resists stress applied to the upper or wrapper so that it is substantially impossible to draw the upper snugly down to the wood of the last or to provide the neat fit and sharp corner desirable where the wrapper of the force-lastedshoe bends about the edge of the middle sole, even though force sumcient to tear the upper material be applied.

Moreover, the customary modes of applying the adhesive are slow and very wasteful of the adhesive, also adding very considerably to the cost of making shoes.

One object of the present invention is to provide means for applying cement simultaneously to two adjacent surfaces, for example, two surfaces located in intersecting planes as for instance the upper of an ordinary cement lasted shoe (assembled on a last with an insole) and the exposed surface of the insole, or as a further example, the inner surface of the wrapper of a force lasted shoe and the margin of the cushion or middle sole of such a shoe, and to provide means operative so to apply the adhesive in a more expeditious, less wasteful and less expensive way than heretofore. A further object is to provide means for so applying adhesive to adjacent surfaces as to avoid prematurely attaching adjacent parts to each other. A further object is to provide cement-applying means operative to apply cement in distinct, spaced ribbons to the two surfaces and adjacent to the line of intersection of the respective planes of said surfaces, but spaced from said line of intersection. A further object is to provide means for stressing one of the parts transversely of the line of intersection while applying the adhesive, thereby to insure application of the adhesive to the proper portion of said part. A further object is to provide adhesive-applying apparatus so designed that the thickness and width of the ribbons of applied adhesive may be varied at will.

A further object is to provide novel means for guiding and advancing the shoe while the adhesive is being applied. A further object of the invention is to provide apparatus of the class described having a container or reservoir for adhesive so devised as to protect the adhesive from contamination by dirt or other solids, to

, shield it from the open air thereby to avoid evaporation loss, and so devised as to avoid such waste as commonly occurs during the transfer of the adhesive from the shipping container to the storage tank of the applying machine. A further object is to provide a novel form of combined shipping and storing container for the adhesive whereby the supply of adhesive may readily and quickly be replenished without waste or exposure of the adhesive to the air, and without requiring substantial delay in the operation of the machine.

Other and further objects and advantages of the invention will be pointed out in the following more detailed description and by reference to the accompanying drawings wherein Fig. 1 is an elevation of the left-hand side of the machine, partly in vertical section, and with certain parts broken away;

Fig. 2 is an elevation of the right-hand side of the machine omitting certain parts and with certain parts broken away;

Fig. 3 is a front elevation (certain parts being broken away) of the machine of Fig. l with the door of the base open to show the parts within the base;

Fig. 4 is a fragmentary vertical section to larger scale, substantially on the line 4-4. of Fig.3, showing the adhesive-applying element in its inoperative position;

Fig. 4 is a fragmentary side elevation illustrating a. modified form of feed roll.

Fig. 5 is a fragmentary vertical section substantially on the line 5--5 of Fig. 2 but to larger scale;

Fig. 6 is a fragmentary elevation, partly in vertical section, showing the left-hand side of the machine to large scale and illustrating the operation of applying adhesive to a force-lasted shoe;

Fig. 7 is a side elevation of one desirable form of cement-applying nozzle;

Fig. 8 is a rear view, partly in section, of the nozzle device of Fig. 7;

Fig. 9 is a plan view of the nozzle of Fig 7 Fig. 10 is a bottom plan view of the nozzle of Fig.

Fig. 11 is a section to large scale on the line ll-ll of Fig. 8;

Fig. 12 is a fragmentary perspective view of a partly completed shoe showing the locationof the ribbons of cement applied to the shoe parts by the mechanism of this invention;

Fig. 13.is a fragmentary rear elevation of an alternative form of cement-applying nozzle;

Figs. Hand 15 are perspective views to larger scalethan Fig. 13, illustrating interchangeable parts of the nozzle of Fig. 13, the nozzle with certain of its parts removed;

Fig. 16 is a diagrammatic plan view illustrating the dispensing container for the adhesive and the means for .connecting the container to the supply pump but before the connection has been made.

Fig. 1'7 is a view similar to Fig. 1 showing the parts in the position which they occupy when the container nas actually been connected to the Fig. 17 is a section to large scale illustrating a safety valve device mounted on the container;

Fig. 18 is a fragmentary section through the wall of the combined shipping and dispensing container illustrating the special construction whereby the container may be secured to the supply pump without admitting air or waste of adhesive;

Fig. 19 is a section similar to that of Fig. 18 showing the container connected to the suction pipe of the pump;

Fig. 20 is a side elevation, partly in vertical section, illustrating a modified form of apparatus;

Fig. 21 is a front elevation of the apparatus of Fig. 20 with the door in the base open to show the interior;

Fig. 22 is a fragmentary elevation of the lefthand side of the machine, to large scale, showing the parts in the inoperative position;

Fig. 23 is a view similar to Fig, 22 but showing the parts in the operative position of applying cement to a shoe;

Fig. 24 is a vertical section to large scale, showing details of the work guiding and feeding means;

Fig. 25 is a fragmentary elevation, partly in vertical section, of the right-hand side of the front portion of the machine showing a wrapperturning plow which is useful in the operation of cementing force-lasted shoes;

Fig. 26 is a fragmentary front elevation of the parts shown in Fig. 25;

Fig. 27 is a fragmentary transverse, diagrammatic section through a last with a shoe upper and sole member mounted thereon, the upper including a wrapper shown in its initial position;

Fig. 28 is a view similar to Fig. 2'7, but showing one stage in the operation of the wrapper-turning plow;

Fig. 29 is a similar view showing the final stage in the operation of the wrapper-turning plow;

Fig. 30 is a diagrammatic perspective view illustrating the relative positions of-the cementapplying, work-feeding and wrapper-turning devices; and

Fig. 3l is a fragmentary perspective view illustrating the mode of operation of the machine.

Referring to the drawings the numeral I designates a hollow base or column having a top member 2 which may or may not be integral with the vertical side walls of the base, the base constituting a protective case for certain operative parts and having within it a chamber 3, preferably having a door aperture at 4 normally closed by a hinged door 5 having a locking handle 6. 0n the rear portion of the top member 2 (Fig. 1) there is mounted an electric motor I having associated therewith a speed reduction mechanism 8 having a power delivery shaft 9. This shaft is journaled in bearings at H), II and I2 carried by the rigid frame I3, the latter being supported by the top member 2 of the base and being integral with said top member if so desired. This frame l3 projects forwardly beyond the vertical front face I5 of the base I so as to space the operating mechanism forwardly awayfrom the base and. thus avoid interference between the work and the base. The frame I3 is provided with horizontal guideways for a slide member l6 .designed to move from front 'to rear and which is constantly urged toward the rear by the spring I! (Figs. 1 and 2). However, this slide [6 may be moved forwardly, in opposition to the spring H, by means of a treadle I8 (Fig. 3) conveniently located for actuation by the operators foot and which operates a rod l9 pivotally connected to one arm of a bell-crank lever 20, pivotally mounted on the frame I3, the opposite arm of the bellcrank lever being connected to the slide Hi.

The drive shaft 9 is provided with a worm 21 (Figs. 1 and 4) at a point between the bearings II and I2, and this worm meshes with a worm wheel 22 fixed to the upper end of a vertical shaft 23 mounted in spaced bearings 24 and 25 carried by or forming a part of the machine frame. The shaft 23 projects downwardly below the lower bearing 25 and has fixed thereto a Work-advancing roll 26. As shown in Fig. 4 this roll has a cylindrical, knurled peripheral surface, such a roll exerting a feeding or advancing action upon the work. Instead of the cylindrical knurled roll 26 a roll such as the roll 26 of Fig. 4 may be used, the roll 2i; having a helical peripheral rib or ribs 21 in this respect being generally similar to the rear roll of the lasting machine disclosed in the patent to Kamborian No. 2,251,-

284, dated August 5, 1941, and having a combined advancing and updrawing action on the work.

The slide I is provided with a downwardly directed bracket arm 28 (Fig. 4) having a vertical bore designed to receive the tubular stem 29 of an applicator nozzle 30. The tubular stem 29 is provided in its side wall with an inwardly convergent opening 3| (Fig. 5) whose outer, larger end is normally registered with a transverse bore 32 in the rear wall of the bracket 28. This bore 32 is internally screw threaded for the reception of the threaded end of a hollow fitting 33 to which is connected theforward end of a flexible, fluidsupply conduit 34. This fluid supply conduit leads to a pressure regulating valve device 35 (Fig. 1) having a regulating handle 36 conveniently located for operation, and also preferably provided with a gauge 31 (Fig. 3) by means of which the operator may determine the pressure at which the adhesive is being delivered to the applicator nozzle. By turning the handle 36 the pressure may be regulated as desired. The fiuid adhesive is supplied to the pressure regulator 35 by means of a pipe 39 leading from the delivery of a force pump 39 (Fig. 1) located (as shown in Fig. 3) in the lower right-hand part of the chamber 3 in the base, the pump being driven by a motor 40 arranged above the pump in the righthand part of the chamber 3 and receiving the fiuid adhesive from a dispensing container 4| arranged within the chamber. While this location of the supply of adhesive and the means for conducting it to the applicator nozzle is desirable and preferred, it is to be understood that the broad invention is not limited to this particular arrangement for supplying adhesive to the nozzle, and that, for example, by suitably locating the supply container, the adhesive may be caused to fiow by gravity to the nozzle, thus avoiding the necessity for a power-driven pump. However, for compactness of arrangement and convenience of use it is preferred to employ a pump to provide the desired pressure of delivery.

Referring to Fig. 4, the tubular stem 29 of the applicator nozzle houses a rotary valve 42 having an axial bore 43 opening at its lower end into the lower part of the tubular stem 29 and having a lateral port 44 at its upper end which may, at times, be registered with the inner, smaller end of the opening 3| in the tubular stem 29 but which at other times is so located as to be closed leaktight by the inner surface of the wall of the tubular stem 29. The upper end of this rotary valve 42 is provided with a collar 45 having a lateral arm 45 to whichis secured one end of a link 4'! (Fig. 4) the opposite end of whichis pivotally connected to an adjustable anchorage member 48 attached to the frame member 25. The parts are so arranged that when the applicator nozzle 30 is operatively related to the work and to the roll 26 by rearward movement of the slide IS, the arm 46 is so positioned'by the link 41 that the valve 42 is disposed to register its port 44 with the opening 3|, thereby permitting adhesive to flow from the pipe 34 through the opening 3| and through the valve passages 44 and 43 into the applicator nozzle. On the other hand when the slide I5 is moved forwardly to the position of Fig. 4, the port 44 in the valve 42 is moved out of registry with the opening 3| thus preventing delivery of adhesive to the applicator nozzle.

The applicator nozzle 30, Fig. '1, has a hollow head portion 49 here shown as integral with the stem 29 and having the internal chamber 50, thehead having the vertical exterior surface 5|,

'51 provides communication between the chamber 50 and the slot or recess 53 and a similar orifice or aperture 58 provides communication between the chamber 50 and the slot or recess 55. The orifices 51 and 59 are of small diameter, for example of the order of 0.01 inch, the proper diameter varying with the viscosity of cement and the pressure developed by'the pump.

The slots 53 and 55 are of a length respectively 4 corresponding to the widths of the desired ribbons of adhesive to be deposited on the inner surface of the upper and on the margin of the sole member and are preferably quite narrow relatively to their lengths, for example, in the ratio of l-4. It will be noted that the adjacent ends of these slots do not reach to the corner where the faces 5| and 52 of the applicator head intersect, but that these adjacent ends of the slots are spaced a substantial distance from said corner.

An alternative construction of the nozzle is illustrated in Figs. 13, 14 and 15. In this arrangement the head portion 49 of the nozzle is provided with an imperforate bottom face and a rear, flat vertical face 5|, the chamber 50 being open at the face 5| For cooperation with this head 49 there are provided two or more interchangeable cover plate 59 (Figs. 14 and 15), each of these plates being provided with an aperture 59 for the reception of a bolt 36*, by means of which the cover plate may be clamped firmly against the vertical face 5P of the head 49. Each of these interchangeable plates 59 is furnished with a shallow recess 60 in that face which is opposed to the vertical surface 5| of the head 49 the recess being designed to register with the chamber 5|] and being defined by a rim 6| having a flat rear face designed, leaktigiht, to engage the surface 5|. This rim has windows at 62 and at 63 so that when the plate is assembled with the head 49 very narrow slots (for instance of 0.001 inch width) are provided leading outwardly from the recess 60 and chamber 50, these slots constituting narrow, elongate delivery orifices, one being in the rear side of the head which is opposed to the roll 26, and the other being at the bottom surface of the head. By providing a series of interchangeable plates 59 having windows 62 and B3 of different dimensions, it is possible, by interchange of these plates, to provide delivery orifices or slots of different widths and/or lengths.

The lower part of the chamber 3 in the base of the machine is preferably provided with horizontally arranged supporting rolls 54 for supporting the adhesive container 4|. The rear wall (Fig. l) of the chamber is furnished with a buffer 65 designed properly to locate'the container 4| within the chamber, and the left side wall (Fig. 3) is also furnished with stops or aibutments 65. Likewise a roll or rolls 64 may be arranged to engage the top of the container. Containers for volatile materials, like certain adhesives, are usually provided with safety valvl, as shown in Figs.

1 and 17*, the container 4| has a vent head 66 at its top provided with spring-pressed ball valves, 88 and 84.

Referring to Figs. 18 and 19, the supply container 4| is shown as having a substantially vertical forward wall 68. This supply container will ordinarily :be of heavy sheet metal and substantially air-tight so as to preserve the contents from contamination by foreign substances and from evaporation, this container preferably being the shipping container in which the adhesive is delivered to the user from the adhesive manufacturer. As illustrated in Fig. 18, the wall 68 of the container is provided with an aperture which receives a nipple 68 having a flange which engages the inner surface of the wall 68, the nipple being permanently secured leaktight to the wall 68, for example, by welding metal at H. The inner end of the nipple is finished to have a flat surface 12 against which a heavy elastic annulus or diaphragm I3, for example of rubber, rubberized fabric or the like, is securely held by a clamping ring 14 attached to the nipple by means of bolts or screws 15. This annulus or diaphragm I3 is preferably furnished with a normally small central aperture 16 converging inwardly toward the interior of the container. The nipple is also provided with an annular, radial shoulder 11 which forms a support for the outer edge of a thin septum normally constituting a part of the wall of the container and which is clamped in place by a screw-threaded clamping ring 18 engaging internal screw threads in the nipple 68, the septum 18 thus constituting a part of the wall of the container duringthe shipment of the container from the manufacturer to the user, the septum 18 being initially imperforate and completely closing the passage through the nipple. Preferably, to protect this thin easily ruptured septum 18, during shipment, a rigid, heavy plug 86 is screwed into the nipple 68, thus protecting the septum 18 from blowswhich might rupture it.

The froce pump 38 (Figs. 16 and 17) which supplies the fluid adhesive to the applicator nozzle has a rigid suction pipe 8| terminating in a fitting 82 providing a socket having a vertical axis in which turns the end of a rigid pipe 83 which is free to swing about the axis of this socket 82 in a horizontal plane. A rigid bracket arm 84 (Fig. 3) is pivoted upon a support 84 carried by the base of the machine so as to swing about the same axis as the pipe 83. This bracket arm 84 is provided with an upstanding rigid bearing portion 85 at its free end, the part 85 having an opening therein (Fig. 19) for the reception of a tubular, externally screw-threaded portion of an annular clamping nut 86, the nut being free to turn in the bearing. part 85. The nut 86 has an axial bore which receives a tubular element or cannula. 81 having a radial shoulder 88 which engages an internal shoulder of the nut 86, the cannula having a tapering inner end portion 88 terminating in a cutting point or trocar 90. The outer end of the cannula is screwthreadedat 8| for engagement with a fitting 82 secured to the free end of the swinging pipe section 83.

nipple 68, and the bracket 84 is then swung back toward normal position. As the bracket approaches its normal position, the sharp trocar end 80 of the cannula enters the nipple 68 and pierces the septum I8 and then, passing through the central aperture 16 of the diaphragm 13, dilates said aperture sufliciently to permit the tapering end of the cannula to enter through the aperture 16 into the container. The dilation of the aperture I6 in the elastic diaphragm l3 causesthe latter to hug the cannula very snugly so as to provide a leaktight joint between the container wall and the cannula. The nut 86 is now screwed into the nipple 69, and by engagement with the flange 88 of the cannula rigidly holds the cannula in place so that it can not be accidentally withdrawn. The cannula thus provides an unobstructed passage from the interior of the contain- .er to the pump 38, although in the operation of so connecting the pump to the container the contents of the container have not been exposed to the outer air, and the connection is so made that there is no possibility of waste of the fluid contents of the container or the contamination of such contents with foreign material. When the container is empty, the nut 86 is retracted, the bracket 84 is swung forwardly again,'thus withdrawing the cannula from the container, and the empty container is removed from the chamber 3 and may be returned to the manufacturer of adhesive for refilling.

Fig. 12 illustrates a shoe of the force-lasted type substantially as it appears after application of the cement by the apparatus above described. This shoe comprises the upper U, the sock lining S, and the Wrapper W, all united by the inseam J and being assembled upon the last L. The middle or cushion sole M is also assembled with these parts,-the wrapper standing upwardly as shown in Fig. 6, and being substantially perpendicular to the lower surface of the middle sole M.

In the operation of the machine, the operator after moving the slide I6 forwardly, introduces the free marginal portion of the wrapper W (at any desired point in its length) between the roll and nozzle, and then allows the slide I6 to move rearwardly, thus gripping the work between the nozzle and roll at the same time'the valve 42 opens. The roll is turning and cement is now forced out through the vertical and horizontal delivery apertures in the applicator nozzle, these apertures extending, the one transversely of the Width of the wrapper and the other substantially perpendicular to the edge of the middle sole, but parallel to the latter. The roll 26, if helically ribbed as suggested, exerts an upward pull on the wrapper W tending to straighten the latter out and to tension it about the edge of the middle sole; whether ribbedor not the rotation of the roll 26 tends to feed the work, that is to say, to advance the shoe as a whole relatively to the nozzle. The result is that the cement which emerges from the applicator nozzle apertures is deposited as ribbons R and R upon the inner surface of the wrapper and upon the margin of .the

middle sole, respectively. Since, as above described, the nozzle apertures are spaced from the intersection of the vertical and horizontal faces of 'the nozzle, the ribbons of cement do not coalesce but are spaced apart, leaving an area C at the intersection of the planes of the wrapper and middle sole uncoated with cement. Thus, when thereafter the wrapper is tensioned upwardly (the cement having in the meantime set and dried) preparatory to laying it down upon the middle sole, there is no dried and set adhesive within the crevice between the wrapper and the outer edge or the middle sole such as would interfere with such upward tensioning of the wrapper. When pressure on the treadle is released, the

nozzle moves forwardly to free the work and at scribed. However, this frame H3 (Fig. 20) is,

provided with horizontal guideways for the slide member I I6 which supports the applicator nozzle 30 as above described. The applicator nozzle is supplied with adhesive through the pipe 34 leading from the pressure-regulating device 35 having the regulating handle 36, the fluid being supplied to the pressure regulator by means of the pipe 38 to which the fluid is delivered from the container M by the pump 39.

In this instance the slide H6 is actuated by a treadle (not shown) similar to the treadle I8 above described, the treadle operating a vertical rod II9 which is connected at its upper end to one arm of a bell-crank lever (Fig. 20) the other arm I20 of which is pivotally connected to the slide I I6. In this instance the slide is urged rearwardly by a spring I Il one end of which engages a collar on the treadle rod I I9, and the other end of which rests upon a portion of the machine base.

In this instance the motor I 08 is mounted within a chamber in the machine frame H3, and has a power delivery shaft I09 (Fig. 20) provided with a pulley I2 I which receives a belt I22, which drives a pulley I23 fixed to shaft I24 (Fig. 24) mounted in bearings I25 and I25 carried by the machine frame. This shaft I24 is inclined downwardly and forwardly, as shown in Figs. 20 and 24, and is provided at its forward end with a roll I26 having a rim I21, preferably of some yieldable material such as rubber or a rubber composition, synthetic rubber or the like. Preferably this rim I21 has a helical rib and is of frusto-conical shape, the inclination of the axis of the roll I26 being such that the work-engaging element of the roll, that is to say that portion of the roll which contacts the work, lies in a vertical plane T, T (Fig. 24) and parallel to the vertical work-engaging face of the applicator 30. The shaft I24 is preferably tubular, and within this shaft is arranged a support I28 which is keyed at I29 to the rear bearing I25 so that the support I28 can not rotate. A spring I3!) is secured to the rear end of this support I28 and permits the support to slide axially of the shaft I24 when subjected to rearwardly acting pressure. The forward end of the support I29 is bifurcated to provide vertically spaced arms I3 I, and between these arms is mounted a work-engaging guide roll I32 mounted to turn freely on a pin I33 fixed in the arms I3I. I

When the margin W (Fig. 23) of a shoe upper U is gripped between the peripheral surface of the roll I21 and the applicator nozzle 30, as illustrated in Fig. 23, the rotation of the roll with its helical rib imparts a feeding or advance motion to the shoe, relatively to the nozzle, and at the same time creates a distinct upward pull or drag on the material of the upper tending to draw it snugly about the last L. Upward motion of the shoe as a whole is opposed by the applicator nozzle 30, whose lower surface engages the exposed surface of the sole member S. As illustrated in Fig. 23, the mechanism is being used for the application of cement to the inner surface of the upper of a shoe of ordinary construction, the upper being assembled with the sole member S upon the last L, the applicator supplying adhesive to the surface of the sole at the same time that it supplies it to the inner surface of the upper. It is obvious that this mechanism may be employed for applyin cement to the wrapper and middle sole of a force-lasted shoe in the same way as the mechanism above described.

Referring more particularly to Figs. to inclusive, the machine is desirably provided, at least when dealing with certain classes of work, with a turning plow P designed, for example, to assist in turning the wrapper strip W downwardly, that is to say, away from the side of the shoe upper, to facilitate the application of the adhesive. When the shoe is first drawn over the last, the wrapper is usually inside out, as shown at the rear part of the shoe (Fig. 30), whereas, preparatory to the application of the adhesive the wrapper must be turned rightside out as shown at the toe end of the shoe (Fig. 30).

As here illustrated, the vertical shaft 23 is provided with a pair of vertically spacedcams I34 and I35. The cam I34 engages an arm I36 projecting laterally from a bar I31 mounted to turn and. also to slide axially in bearings carried by a part I31 secured to a convenient portion of the frame I3 of the machine. The cam I engages a roll which turns freely on a pin secured 40 to the bar I31, the cam I35 tending to lift the bar I31 in opposition to the action of a spring I39 which tends to move the bar downwardly and also to hold the bar against turning. The cam I34, acting on the arm I36, turns the bar I31 through approximately one-quarter revolution for each rotation of the shaft 23. The lower end of the bar 31 carries the plow P, comprising an upwardly directed, laterally offset beak having a narrow, upper, work-engagin edge MI, and a substantially flat and vertical face I42, the face I42 being disposed substantially parallel to the side of the shoe upper at the beginning of the turning operation. As illustrated in Figs. 2'1, 28 and 29, the edge I4I of the plow is first engaged beneath the inside-out wrapper W and as the bar I31 rises, the edge I4I of the plow gradually lifts the wrapper to the position shown in Fi 28. The bar I-31 is then rotated until it occupies the position shown in Fig. 29 and in so doing imparts a slight twist to the wrapper which facilitates the final disposition of the wrapper as shown in Fig. 29 where it is substantially perpendicular to the surface of the sole member S. The bar I31 then moves downwardly and again turns to present the face I42 of the plow toward the outer surface of the shoe upper and the edge I4I engages a fresh portion of the wrapper and the operation is then repeated. The rapid up and down and turning motion of the plow, turns the wrapper right-side out automatically in preparation for the application of the cement, so that the operator is not obliged to turnthe wrapper by hand. Since, as illustrated, this plow is located to the left of the cement-applying means, the

shoe must be moved in the direction of the arrow

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