US1979000A - Lasting footwear - Google Patents

Lasting footwear Download PDF

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US1979000A
US1979000A US1979000DA US1979000A US 1979000 A US1979000 A US 1979000A US 1979000D A US1979000D A US 1979000DA US 1979000 A US1979000 A US 1979000A
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last
insole
shoe
lasting
wipers
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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D21/00—Lasting machines
    • A43D21/003—Lasting machines with lasting strings, stretching straps or the like, for forming the shank portions of shoes

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  • This invention pertains to the lasting of footwear and relates more particularly to a method of and a machine for lasting those lateral portions of a shoe upper which intervene between the heel and toe,-machines for performing this function being commonly known as side-lasting machines.
  • the side lasting involves the operation of stretching the shoe upper taut and smooth over the shank and ball portion of the last, and securing the lower margin of the upper to the sole member which is mounted upon the last bottom.
  • it is essential to avoid tensioning the material to such an extent as to draw the top edge of the upper out of proper position on the last, and thus the amount of stretch which may safely be applied is usually limited.
  • the upper is thus stretched, its lower edge must be secured in place by suitable attaching means which will hold it in lasted position.
  • the most common mode of attaching the edge of the upper to the insole is by driving tacks through the upper material and through the insole into the last, such tacks being afterward removed, in accordance with some processes of manufacture, or permanently left in position, in accordance with other methods.
  • Another way of attaching the edge of the upper is by the use of 3 staples which are so inserted that while they do not pass completely through the sole member, they obtain a firm anchorage therein and are left permanently in place.
  • the improved character of shoes made in accordance with the method just referred to has led to the demand for a lasting process such that the sides of the shoe may be lasted without recourse to metallic fasteners of any kind, and thus the principal object of the present invention is to provide a practical method of and apparatus for side lasting a shoe, without necessitating the driving of metallic fasteners of any sort into the side portions of the shoe bottom.
  • the shoe upper is first assembled with the sole member 65' upon a last of usual and ordinary construction and pulled over in any desired manner, the quarter lining and counter being preferably pulled in and held by temporary tacks. Then, following my present invention, and while the shoe is held in convenient position, preferably bottom up, I stretch the sides of the upper over the last and onto the sole member, for example, by the use of hand lasting nippers, or by any other suitable means familiar to those skilled in the art. However, in accordance with the present invention I apply pressure (beginning substantially at the start of the stretching operation) to the sides of the shoe upper, causing this pressure first to bear against the upper near the top of the last and gradually extending the pressure toward the last bottom as the pulling and stretching operation is carried on.
  • I employ fluid pressure for this purpose applied in such a way as to exert force substantially normally to the last surface at all points, and when the stretching operation is substantially completed, this pressure has become nearly uniform at all parts of the side of the upper.
  • I make certain the maintenance of the top edge of the shoe upper at the proper point on the last, regardless of the amount of stretch exerted, and produce the maximum stretch near the lower part of the upper where it is most necessary in order to conform the upper to the curved shank and ball portion of the last. 5
  • insole sticky or adhesive for example, by coating one or both of such surfaces with rubber latex or other cement which dries quickly, particularly in the presence of heat, I cause a set of wiper fingers (preferably heated) to advance into engagement with the margin of the upper so as to wipe the latter in onto the sole member, such wipers being arranged to exert a very substantial and preferably progressively increasing pressure upon the upper material as they advance.
  • wipers are so arranged, and the upper is so protected, that they only contact with the marginal material which is to be wiped in and thus, even if heated, will not injure the appearance or finish of the exposed parts of the completed shoe.
  • the wipers are now kept in the advanced position until the cement has set sufliciently to retain the shoe parts in lasted position and preferably, during this time, I move the last forcibly toward the wipers, thereby to flatten and level the wiped-in material.
  • I last the second side of the shoe while holding the wipers in advanced position over the lasted-in material at the first side.
  • Fig. 1 is a front elevation, partly broken away and with certain parts omitted, showing apparatus embodying my present invention and designed for lasting a left shoe, the parts being shown in the position which they occupy at the beginning of the lasting operation;
  • Fig. 2 is a vertical section substantially on the line 2--2 of Fig. 1;
  • Fig. 3 is a fragmentary bottom plan view showing the pressure-applying bags and wipers retracted from the shoe, the latter being mounted upon the supporting back ready for the beginning of the operation;
  • Fig. 4 is a view similar to Fig. 3 showing the right-hand set of lasting wipers as advanced over the shoe bottom in the position which they occupy at the completion of the side lasting on the righthand side of the shoe as viewed in this figure, while in the opposite side the pressure-applying device is in contact with the side of the shoe and the upper is just being stretched by the operator;
  • Fig. 5 is a fragmentary transverse vertical section, to larger scale, showing one of the movable carriages with its pressure bag and wipers;
  • Fig. 6 is a horizontal section, with certain parts omitted, substantially on the line 6-6 of Fig. 1;
  • Fig. '7 is a side view of the pressure-applying bag partly in vertical section;
  • Fig. 8 is a plan view (omitting parts) illustrating the carriages which support the pressureapplying means, together with the portion of the mechanism for actuating the carriages;
  • Fig. 9 is a section substantially on the line 9-9 of Fig. 8 illustrating certain details of the carriage-actuating mechanism
  • Fig. 10 is a fragmentary vertical section on line 1010 of Fig. 1 showing the guideways which support the wiper carrier;
  • Fig. 11 is an inside elevation of the wiper carriage and heater device but omitting certain parts
  • the apparatus is so arranged as to hold the shoewith its bottom side up while lasting it, as in a bed lasting machine, but when hereinafter I refer to the bottom" of the last, I intend thereby to indicate that surface of the last which receives the insole, and when I refer to the top of the shoe upper, I thereby mean that part which is at the top of the shoe when the latter is in use. Also in referring to the inner side of the shoe I mean that side thereof which is at the inner side of the foot when worn, and in the description of the machine operation I indicate motion of parts toward the last as inward and movements of parts away from the operator as rearward.
  • my improved apparatus comprises a frame having a top member or table 1 supported upon front legs 2 and rear legs 3. At a point near the lower ends of the legs the latter are connected by a shelf or platform 4 designed to support a portion of the operative mechanism.
  • the table 1 carries the machine head 5.which is secured to the table by means of bolts or in any other suitable manner and, if desired, a wedge may be interposed between the head and table to tilt the head forwardly, although this is not essential.
  • the head which is preferably a casting, includes an upright hollow column 6 having, near its top, a forwardly projecting boss 7 which carries a pivot pin 8 on which a jack-supporting bracket 9 is pivotally mounted.
  • This jack-supporting bracket is arranged to swing in a vertical plane, but is normally held substantially in the position shown in Fig. 2- by means of a coiled tension spring 10 which is attached to the righthand end of the bracket 9, as indicated in Fig.
  • the bracket 9 supports a horizontally slidable carriage 11 which may be adjusted in the front to rear direction by means of a hand wheel 12 and a screw-threaded shaft.
  • the carriage 11 carries the jack 13 which is vertically adjustable in the carriage and may be held in adjusted position by means of set screw 14.
  • This jack 13 is of a type commonly employed in shoemaking apparatus for supporting a last and includes a spindle 13 which fits within the socket provided for this purpose in lasts of ordinary con struction.
  • a last L is indicated in Fig. 2 as mounted on the jack, and as illustrated in Fig. 5, the last carries a shoe upper U and the insole S.
  • the head 5 also comprises a pair of upwardly extending bracket arms 15 disposed at opposite sides of the jack-supporting bracket 9 and these arms support a substantially horizontal base member 16 upon which carriages 1'7 and 18 are mounted.
  • the carriages 1'7 and 18 are furnished with horizontal arms 19 and 20, respectively, provided on their inner faces with racks which mesh with a pinion 21 mounted on a vertical shaft 22 journaled in an opening in the base member 16.
  • the shaft 22 carries a second pinion 23 which meshes with rack teeth 24 on the side of a rack bar 25 mounted to slide in a guideway 26 secured to the under surface of the base 16.
  • the rack bar 25 is also furnished with rack teeth 27 on its under side, meshing with a gear sector 28 fixed to a shaft which turns in a bearing 29 carried by a bracket 30 projecting from the rear part of the column 6.
  • the shaft which carries the sector 28 is furnished at its opposite end with a lever arm 31 to which a link 32 is suitably secured. This link extends downwardly to a point below the shelf 4 and is pivotally secured at its lower end to a treadle lever 34 pivotally secured at its rear end upon a shaft 35 which is supported by brackets carried by the rear legs 3.
  • the pedal lever 34 extends outwardly through a vertical slot 36 in a plate 37 attached to the forward edge of the shelf 4 and depending from the latter substantially to the floor on which the machine rests.
  • the forward end of the pedal lever is furnished with a foot treadle 38, and preferably one edge of the slot 36 is furnished with detent teeth 39 with which the upper edge of the lever 34 may be engaged by a slight lateral movement of the lever such as is permitted by lost motion in its pivotal bearings, whereby the pedal lever may be locked in selected depressed position.
  • the carriage 17 comprises an inner substantially vertical wall 40 (Fig. 11) having a slot 41 therein for the passage of a bolt 42 which is screw threaded for engagement in a threaded opening in a plate 43 disposed at the outer side of the member 40.
  • the plate 43 is held in adjusted position against the member 40 by means of bolts 44, while the bolt 42 is held locked in adjusted position in the plate 43 by means of a suitable locking nut.
  • the inner end of bolt 42 is furnished with a ball 45 which enters a socket in a block 46, the latter being secured to a bracket member 47 which is thus supported by the bolt 42 for universal tilting movement.
  • the bracket 47 carries an abutment plate 48 (Fig. 5) against which an inflatable pressureapplying bag 49 rests.
  • This bag is preferably of rubber or other suitable elastic and stretchable material and, in front to rear section, is of substantially the contour illustrated in Fig. 7.
  • this bag is furnished with one or more substantially horizontal septums 50, 51, etc., dividing the bag into a plurality of compartments, each extending longitudinally of the bag.
  • Each septum is furnished with an orifice 52, 53, etc., while the wall of the lower compartment is provided with a nipple 54 for attachment of a fluidsupplying pipe 55.
  • the orifice in the lowermost septum is of larger diameter than that in the septum next above it, with a further progressive decrease in the size of the orifices if a greater number of septums are employed, and as illustrated in Fig. 7, it is preferred to stagger the orifices so that fluid passing from one compartment to the next must traverse substantially the entire length of one compartment before flowing through the next orifice.
  • the upper surface 56 of the bag is shaped sub stantially as illustrated in Fig. 7 so as to conform more or less closely to the contour of that side of the shoe bottom which is in proximity thereto, it being understood that the upper wall of the bag at opposite sides of the last will be differently contoured to correspond to the inner and outer sides of the last.
  • that side of the bag which is opposed to the last is protected by means of a piece 57 of leather, textile fabric, or other flexible material which is secured at its lower part, by means of a clamping plate 58, to the abutment plate 48, while its upper part is clamped by means of a shield plate 59 to the abutment plate 48.
  • this shield plate 59 extends substantially across the upper edge of the bag so as to protect the bag from direct contact with the heated wipers hereafter described and to form a guide for such wipers.
  • a fluid supply pipe 55 is connected to the nipple 54 and extends downwardly to a Y-connection where it joins a similar pipe from the other bag, and then extends down to a T-connection 55*, one branch of which is connected by a pipe 55 to a cylinder 60.
  • This cylinder is mounted on the shelf 4 and is provided with a piston 61 having a piston rod 62 surrounded by a coiled spring 63 normally tending to move the piston rearwardly in the cylinder.
  • the piston rod 62 is connected to the upper end of one arm 64 of a bell crank lever comprising a sleeve 65 mounted to turn upon a shaft 66 supported in brackets 67 projecting rearwardly from the rear legs 3.
  • This bell crank lever comprises a second upstanding arm 67 to which a link 68 is pivotally connected. The opposite end of this link is pivotally secured to an arm 69 of a treadle lever mounted upon a stub shaft 70 carried by a bracket 71 secured to the under side of the shelf 4.
  • This treadle lever has a forwardly extending arm 72 passing outwardly through a slot 73 in the plate 37 and carrying a treadle 74 at its forward end.
  • One edge of the slot 73 is preferably furnished with detent teeth 75 for retaining the treadle lever in depressed position.
  • the T-connection 55 has a horizontal branch '76 which is connected to a second T-connection 77 from which a pipe 78 extends upwardly to a reservoir 79 mounted on a bracket carried by one of the rear legs 3, such reservoir being in the form of a cylinder having a piston 80 therein.
  • This piston may be depressed by means of a screw-threaded shaft 81 having a hand wheel 82 so that by turning the hand wheel force may be applied to the contents of the reservoir 78 to force the contents thereof into the cylinder 60.
  • This reservoir is intended to provide a supply of pressure fluid which may be fed to the pressure system as desired in order to make up for leakage or other losses therein.
  • the carriage 17 is furnished withan upper, inclined guide surface 83, preferably divided by a slot 84 designed to accommodate certain of the parts of the mechanism, and has an upstanding rib 85 also divided by this slot.
  • This rib is undercut at its opposite edges to form a dovetail connection with a sliding wiper carrier 86 which is adapted to slide inwardly and downwardly upon the surface 83 of the carriage 17.
  • This carrier 86' is furnished with an outstanding ear 87 disposed in the plane of the slot 84, and to this ear is pivotally secured one end of a universal Joint connection 88 to the other end of which is secured an operating lever 89.
  • This lever is pivotally connected to a bracket 90 mounted on the carriage l7, and is furnished at its forward end with a handle 90 disposed in a convenient position to be grasped by the operator.
  • a guide plate 90 is secured to the forward edge of the base member 16 and has a horizontal slot 90 through which the lever 89 passes and which is adapted to support and guide such lever in its movements. Movement of this lever about its pivotal support on the bracket causes the carrier 86 to slide in and out along the inclined guidesurface 83, the universal joint connection between the lever and the carrier permitting this movement without cramping.
  • the carrier 86 comprises an outer portion 91 which is adjustably secured to the bodyof the carrier by bolt and slot connections or the like and the upper surface of part 91 is of substantial contour, indicated at Fig. 13.
  • This part 91 has an upstanding rim 92 defining the outer edge of a trough 93 which is adapted to receive the downturned toes of a series of wiper fingers 95.
  • Each wiper finger is provided with a boss 96 having an opening extending downwardly therethrough for the reception of a bolt 97 having a head 98 at its upper end and which is encircled by a coiled compression spring 99 bearing at its upper end against the under side of the carrier and at its lower end against a nut 100 at the lower end of the bolt.
  • the inner ends of the wiper fingers 95 (such inner ends constituting the wipers, proper) normally rest upon and slide across the upper surface 101 of a supporting member 102 having downwardly directed legs 103 which are adjustably secured to upstanding lateral flanges 40 projecting outwardly from the member 40 of the carriage 17, the legs 103 being vertically adjustable in slots in the member 40 by means of retaining bolts 103.
  • the surface 101 is slightly below the surface of the shield plate 59 and also below the level of the exposed surface of the insole on the last.
  • the support 102 preferably is furnished with a chamber for the reception of a heating element 105 so as'to heat the wipers during the time that they rest on the support.
  • this heating element consists of an electrical resistance coil receiving energy through a cable 106 leading to a control box 107 secured to the righthand edge of the table 1.
  • This control box' may contain any desired switch and rheostat mechanism for controlling the amount of current delivered to the heating coil and receives current through a cable 108 from any suitable source.
  • the support 102 is furnished with set screws 102 which in efiect define the front and rear edges of a channel in which the inner ends of the fingers 95 are guided, the surface 101 which constitutes the floor of the shallow channel being curved in a longitudinal direction in accordance with the contour of the lower part of the adjacent side of the last.
  • the inner ends 95" of the fingers 95 are preferably curved upwardly as shown in Fig. 5 and are adapted to ride over the guard plate 59 and to fold or wipe in the margin of the upper material.
  • I provide each wiperwith a spring 109 secured at its upper end to a bracket 110 projecting from the under side of the wiper and anchored at its lower end to a bracket 111 secured to the carrier 86.
  • the ends of the wipers advance, they engage the guard plate 59 and are raised from surface 101 and guided so as to pass easily over onto the insole as they begin to wipe in the upper.
  • a bracket 112 projects from the rear part of the member 16 and supports a hydraulic cylinder 113 having a piston 114 therein provided with a piston rod which carries a saddle member 115.
  • This saddle member is preferably more or less V-shaped in transverse section and covered with suitable cushioning material such, for example, as leather or rubber, adapted to contact with the cone portion of the last.
  • a flexible pipe 116 extends downwardly from the lower end of the cylinder 113 to a T-connection 117, one branch of which is secured to the T-connection 77 and another branch of which is connected by a pipe to a cylinder 118 mounted on a shelf 4.
  • This cylinder 118 (Fig.
  • a piston 119 with a piston rod 120 which is encircled by a coiled spring 121 tending to push the piston rearwardly.
  • the rear end of the piston rod 120 is pivotally connected to the upper end of an arm 112 of a bell crank lever comprising a sleeve 123 mounted to turn on the shaft 66 and having a second arm 124 connected by a link 125 to an arm 127 of a treadle lever pivoted on a stub shaft supported by a bracket 128 carried by the shelf 4.
  • This treadle lever has a forward arm 129 projecting out through a slot 130 in the plate 37 and is furnished at its forward end with a treadle 131.
  • the edge of the slot 130 may be provided with detent teeth 132 for holding the treadle lever in depressed position.
  • the apparatus hereinabove illustrated and described is designed for lasting 'a left shoe, the pressure-applying bags, and the guides for the wipers being properly shaped for lasting a left shoe. While it would be possible to provide interchangeable guides for the wipers, together with appropriate pressure bags so that the same machine could be used for lasting both left and right shoes, I prefer to provide two separate sets of mechanism, preferably mounted on the same base,-each of the same general construction as hereinabove described,-one of such mechanisms being properly fitted for lasting left shoes and the other for lasting right shoes, thus avoiding the necessity for adjustment or interchange of parts in shifting from right to left shoes. Obviously one operator may use one set of mechanism for lasting left shoes, and another operator may use the other mechanism for lasting right shoes, but preferably the same operator will use both mechanisms alternatively.
  • Fig. 13 I have diagrammatically illustrated a suitable arrangement of two such mechanisms M and N for lasting right and left shoes, respectively, mounted upon the same base Q.
  • automatic means may be provided for releasing the shoe from one mechanism when the operator has completed his work on a shoe in the other set'of mechanism.
  • the operator takes the last with its assembled upper and insole and mounts it upon the spindle 13 of the jack 13, adjusting the jack so as to bring the ball portion of the shoe substantially in line with the central wipers, as indicated at B in Fig. 4, and adjusting the jack up or down, as experience may indicate to be desirable and in accordance with the size of the shoe to be operated upon,--at the" same time adjusting the saddle 115 to the desired point to support the forward part of the shoe at the proper level. If the quarter lining and forward corners of the counter have not already been lasted in, the operator may now perform this operation, inserting a temporary tack at each corner of the counter to hold these parts in place.
  • the operator next depresses the treadle 38, thus causing the carriages 17 and 18 to approach each other, thereby bringing the pressure-applying bags 49 into contact with the opposite sides of the shoe upper.
  • the operator seizes the upwardly projecting margin of the shoe upper at one side of the last by means of lasting pinchers P or otherwise, and draws the upper taut and snug about the side of the last in a manner well understood by skilled lasters.
  • the operator depresses the treadle 74, thus forcing the piston 61 forwardly in the cylinder 60 and thereby driving pressure fluid, for example, water or oil, upwardly through the pipe 55 into the bags 49..
  • the pressure fluid first enters the lower compartment of the bag and expands the inner wall of said compartment so as to exert substantial clamping pressure against the shoe upper near the top of the last.
  • the pressure of the fluid in the bag gradually extends over an area which progressively advances downwardly toward the bottom of the last or, as viewed in Fig. 5, for example, upwardly from compartment to compartment of the bag.
  • the stretching may be continued at the lower margin of the upper where it is most necessary and where the upper must be caused to conform to the sharp curvature at the shank and ball of the shoe, while the top parts of the upper are clamped and held against excessive stretch.
  • the operator applies some suitable adhesive, either to the inner surface of the upstanding margin of the upper, or to the margin of the insole or to both, one such adhesive being rubber latex, although I contemplate the use of other adhesives as being suitable for the purpose.
  • adhesive being rubber latex, although I contemplate the use of other adhesives as being suitable for the purpose.
  • the springs 109 pull the wipers down flrmly toward the surface 101, but that as the wipers move inwardly, no further support is furnished by the surface 101, so that the free ends of the wipers exert a progressively increasing component of force in a direction substantially perpendicular to the bottom face of the insole.
  • the wiper carrier descends, thus, as above described, rocking the advancing ends of the wipers so that they ride easily and smoothly over the insole, the action of the springs 109 becoming 106 more and more pronounced as the wipers advance.
  • the operator lasts the inner side of the shoe first, since this is the more difiicult operation, and while he is lasting the opposite 110 side of the shoe he leaves the wipers in advanced position at the inner side to insure a thorough setting of the cement.
  • the operator now proceeds to last the other side of the shoe in accordance with substantially the same series of steps. 11
  • the right-hand bag is already inflated, but I flnd that the progressive inflation of the bag, as already described, apparently produces a certain degree of stretch in the upper, or at least conforms it to the last, so that I the operator is able to complete its stretching at the lower margin of the upper without releasing the pressure, the outside of the shoe being relatively easy to last.
  • the wiper carrier at the right-hand side of the machine is now moved inwardly by the operator, wiping in the righthand side, as viewed in Fig. 2.
  • That method of side lasting shoes without using any substantial number of metallic fasteners at any stage of the process which comprises as steps assembling an upper and insole upon a last, clamping the upper against the lateral surface of the last by the use of clamping devices devoid of upper penetrating elements, subsequently gripping the lower edge portion of the upper and stretching it taut against the lateral surface of the last by a direct and positive lasting pull, causing the inner surface of the margin of the upper to become sticky, folding such margin over onto the insole, and holding such margin under pressure until it is permanently united to the insole.
  • That method of side lasting shoes without the use of metallic fasteners which comprises as steps stretching the upper taut against the lateral surface of the last by gripping the lower portion of the upper and exerting direct mechanical pull thereon, and, while holding the upper stretched by the use of devices which do not penetrate the upper, wiping in the margin of the upper/onto the insole, causing the opposed surfaces of such margin and insole to become sticky at some stage of the operation, and thereafter subjecting said margin to heat and pressure until it is permanently united to the insole.
  • That method of side lasting shoes which comprises as steps pulling an upper over a last having an insole mounted thereon, lasting in the quarter lining and counter, applying pressure to the side portion of the upper to clamp the upper firmly against the last surface, and, while maintaining such pressure, wiping in the lower margin of the lateral portion of the upper over onto the insole and holding it under heat and pressure until it has set in position.
  • That method of side lasting shoes which comprises as steps pulling an upper over a last having an insole mounted thereon, securing the forward ends of the counter in lasted position, clamping the top portion of the upper against the last, stretching the lower part of the upper taut over the lower part of the last by a direct pull applied to the lower part of the upper, applying adhesive to the margin of the upper wiping in the margin of the upper over the insole, and maintaining said wiped-in margin under heat and pressure until the adhesive material has substantially set in lasted position.
  • That method of lasting shoes which comprises as steps assembling an upper and an insole upon a last, applying pressure to that part of the upper adjacent to the top of the last whereby to clamp such part of the upper in predetermin d position against the last, gripping the lower portion of the upper and stretching it taut by force positively applied to its free lower edge so as to bring it into close contact with the lower portion of the lateral surface of the last, clamping the lower part of the stretched upper against the last, wiping in the margin of the upper onto the insole, causing the opposed surfaces of the insole and wiped-in material to become sticky at some stage in the process, and holding the wiped-in marginal material under heat and pressure until it is permanently united to the insole.
  • That method of lasting shoes which comprises as steps assembling an upper and insole upon a last, applying pressure by means of a fluid medium to the upper throughout an area extending longitudinally of the upper near the top of the last, gripping the lower edge of the upper and stretching it by a positive pull while causing said area progressively to advance toward the last bottom, and while maintaining such pressure, wiping in the margin of the upper over the last bottom.
  • That method of lasting shoes which comprises as steps pulling the upper over a last having an insole mounted upon its bottom, applying lateral pressure to the side portions of the upper at points-near the top of the last while leaving the lower portion of the upper relatively free, stretching the upper by force applied to its lower edge so as to draw the upper taut about the shank portion of the last, and, while so stretching the upper, causing the point of application of the lateral pressure to advance progressively toward the bottom of. the last.
  • That method of lasting shoes which comprises as steps assembling an upper and insole upon a last, applying pressure to the upper in a direction substantially normal to the surface of the last at points near the top of the last, gripping the upper near its lower edge and exerting a positive pull thereon to stretch and draw its lower portion taut about the last, applying a quick setting cement to the inner surface of the lower margin of the upper, laying said margin into contact with the'surface of the insole, and applying pressure and heat to said margin to cause it permanently to adhere to the insole.
  • That method of lasting shoes which comprises as steps assembling an upper and insole upon a last, applying pressure to the upper in a direction substantially normal to the surface of the last at points near the top of the latter, gripping the upper near its lower edge and exerting a positive pull thereon to stretch and draw its lower portion taut about the last, applying cement to the inner surface of the margin of the insole, moving an elongate wiper longitudinally into contact with said margin for folding the margin over onto the insole, causing the advancing end of the wiper to press forcibly against the margin in a direction toward the surface of the insole, and while so advancing it depressing its outer end and thereby rocking its work-engaging end to insure a smooth advance, and thereafter holding such margin under pressure by the wiper until the cement has set.
  • That method of lasting shoes which comprises as steps assembling an upper and insole upon a last, applying pressure to the upper in a direction substantially normal to the lateral surface of the last, gripping the upper near its lower edge and exerting positive pull thereon to stretch and draw its lower portion taut about the last, engaging a heated wiper member with the lower margin of the upper and causing said wiper memher to advance laterally over the surface of the insole with increasing pressure toward the surface of the insole while rocking the advancing end of the wiper whereby to. fold in the margin of the upper and lay it flat and smooth against the surface of the insole.
  • That method of lasting shoes which comprises as steps assembling an upper and insole upon a last, gripping the upper near its lower edge and exerting a positive pull thereon to stretch and draw its lower part taut about the last, applying cement to the inner surface of the margin of the upper, wiping in such margin over the surface of the insole while applying constantly increasing pressure to such margin in such a direction as to force it into contact with the insole, and maintaining such pressure until the margin has set in lasted position.
  • That method of side lasting shoes which comprises as steps assembling an upper and insole upon a last, gripping the upper near its lower edge and exerting a positive pull thereon to stretch and draw its side portions taut about the sides of the last, applying adhesive to the inner surface of the upper along its margin, and wiping such margin, at the sides of the shoe, inwardly over the surface of the insole by the application of force having components substantially perpendicular and transverse to the insole, respectively, that component of force which is perpendicular to the insole being progressively increased as the wiping in operation proceeds, and maintaining the final pressure until the adhesive has set.
  • Apparatus for side lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, means for holding the top portion of a side of the upper in predetermined position on the last while stretching said side of the upper taut over the last, and means operative to apply heat and pressure to the margin of the upper while holding such margin in contact with the insole.
  • Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, pressure applying means comprising an expansible bag engageable with the shoe upper, said bag having a plurality of compartments, and means operative to inflate said compartments successively whereby to apply pressure first to one portion of the shoe upper and then to another.
  • Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, pressure applying means comprising a plurality of fluid compartments each having an expansible wall engageable with a part of the shoeupper, said compartments being disposed at different levels relatively to the height of the shoe last, and means operative to deliver pressure fluid successively to said compartments beginning with the compartment disposed nearest to the top of the last and finishing with the one disposed nearest the lower edge of the last.
  • Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, pressure applying means comprising an expansible bag engageable with the shoe upper, said bag having a plurality of septums dividing it into separate compartments, said compartments extending longitudinally of the last and being disposed at different levels as referred to the height of the last, said septums having orifices of predetermined capacity therethrough, and means for delivering pressure to that compartment nearest the top of the last, the orifices permitting said fluid to pass progressively from one compartment to the next.
  • Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, pressure applying means comprising a fluid-tight expansible bag having one side thereof disposed adjacent to the side of the shoe upper, a rigid abutment for the other side of the bag, a septum dividing the interior of the bag into compartments, said septum having an orifice therethrough, and means for forcing pressure fluid into one compartment of the bag, the orifice permitting the fluid to pass at a predetermined rate into the other compartment.
  • Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, pressure applying means comprising a fluid-tight receptacle having at least one side which is expansible when exposed to internal pressure, said side being engageable with the shoe upper, a plurality of septums dividing said receptacle into compartments extending longitudinally of the shoe and disposed at different levels as referred to the height of the last, eachseptum having an orifice therethrough, the orifices being of progressively smaller size in successive septums progressing from the upper toward the lower part of the last, said orifices being staggered relatively to each other, and means for delivering fluid under pressure to the compartment nearest to the top of the last.
  • Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, pressure applying means disposed at opposite sides-of the shoe upper at the shank and forepart portion thereof, each such pressure applying means comprising an inflated bag, means supporting each bag for bodily movement toward and from the last, means for bodily moving each bag toward and from the last, means for locking each bag in 0perative position relatively to the last. and means actuable by the operator for inflating said bags.
  • Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, an elongate wiper for wiping in a portion of the margin of the shoe upper at the side of the shoe, a heated support for the wiper on which the wiper rests when retracted from the work, said support being at a lower level than that of the exposed surface of the insole, means for advancing the wiper over the insole while causing the wiper to apply progressively increasing pressure in a direction toward the bottom of the insole, and means causing the outer end of the wiper to descend and thereby rocking its work-engaging end so as to maintain the point of maximum pressure adjacent to the edge of the insole.
  • Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, an elongate wiper for wiping in a portion of the margin of the upper at the side of the shoe, said wiper having a curved work-engaging end, means for advancing the wiper over the insole, and resilient means operative to cause the work-engaging end of the wiper to exert a progressively increasing pressure upon said marginal material. and means for rocking the work-engaging end of the wiper as it advances.
  • Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, a rigid wiper member having a work-engaging end engageable with a portion of the lower margin of the shoe upper at the side of the latter, a heated support on which the work-engaging end of the wiper rests when in inoperative position, said support being at a lower level than the exposed surface of the insole, means for guiding the work-engaging end of the wiper up and onto the insole as the wiper is advanced, means for advancing the wiper, and means for pressing the wiper forcibly against the marginal material as the wiper advances.
  • Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, and a series of heated wipers arranged side by side and movable inwardly over the bottom of the shoe to wipe in the margin of the upper, means normally supporting the work-engaging ends of the wipers at a level lower than that of the insole, resilient means constantly urging said advancing ends downwardly, means for guiding the wipers each in a path such that their advancing ends all move inwardly across the edge of the insole at substantially the same distance from the latter, and means operative to cause the advancing ends of the several wipers to move nearer and nearer to the insole as they advance, whereby to exert progressively increasing force upon the margin of the upper.
  • Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, a series of heated wipers disposed at each side of the shoe respectively, means for guiding each set of wipers so that as the wipers advance over the insole their advancing ends move freely across the edge of the insole but thereafter. approach the latter, means for heating the wipers, and means for simultaneously advancing the wipers of a set over the insole to wipe in and press the margin of the upper into contact with the insole.
  • Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, a series of heated wipers disposed at each side of the shoe, means for guiding each series of wipers so that as they advance over the insole their advancing ends move freely across the edge of the insole, a movable carriage supporting each series of wipers, means for moving the carriages toward the last, and independent means operative tomove the wipers of eitherse ins inwardly over the insole.
  • Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, a series of wipers, a movable carriage supporting the wipers, a wiper guide over which the wipers move, the wiperengaging surface of the guide being longitudinally curved in accordance with the longitudinal contour of the bottom of the shoe last at that side of the last at which such guide is disposed, and means for simultaneously moving said wipers to cause their end portions to advance over the insole as they move transversely across the guide.
  • Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, a series of elongate wiper fingers, each having a rounded work-engaging surface and movable longitudinally to cause its work-engaging surface to move over the insole, a carrier for the wiper fingers, means for moving the carrier whereby to cause the workengaging surfaces of the wiper fingers concomitantly to advance transversely over the insole and to approach the surface of the insole.
  • Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, a series of wipers, each movable in the direction of its length to cause its advancing end to project inwardly over the edge of the insole, a carrier for the wipers, means for moving the carrier whereby simultaneously to advance all of the wipers, and inclined guide means for the carrier so arranged that the advancing ends of the wipers are caused to rock as they move transversely over the insole surface.
  • Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, a series of elongate, longitudinally movable wipers for wiping in the margin of the upper over the insole, normally spaced supporting means for each wiper, one of said supporting means being stationary and adjacent to the last and the other of said supporting means being movable toward and from the last, spring means for applying operating force to said wipers, said spring means being so arranged as to apply increasing force as the wiper advances, such force having a component tending to move the wiper transversely over the insole and having a progressively increasing component which tends to press the advancing ends of the wipers into contact with the insole.
  • Apparatus of the class described comprising a last-supporting jack, pivotal means upon which the jack may swing in a front to rear direction, wipers for wiping in the lateral margins of a shoe upper mounted on the last, a saddle for supporting the forward end ofthe last, a hydraulic cylinder having a piston therein, the piston being connected to the saddle, and means for supplying L30

Description

Oct. 30, 1934. J. s. KAMBORIAN 1,979,000
LASTING FOOTWEAR Filed May 23. 1952 5 Sheets-Sheet 1 Oct. 30, 1934. J 5 KAMBORMN 1,979,000
LASTING FOOTWEAR Filed May 25. 195?. 5 Sheets-Sheet 2 If I I 1% 3| 115 1, 6' la -125i 2F Oct. 30, 1934. J. 5 KAMBORIAN 1,979,000
LASTING FOOTWEAR Filed May 25. 193?. 5 Sheets-Sheet 3 Oct. 30, 1934. J. 5 KAMBORlAN 1,979,000
LAST ING FOOTWEAR Filed May 23, 195?. 5 Sheets-Sheet 4 Patented Oct. 30, 1934 UNITED STATES PATENT OFFICE 30 Claims.
This invention pertains to the lasting of footwear and relates more particularly to a method of and a machine for lasting those lateral portions of a shoe upper which intervene between the heel and toe,-machines for performing this function being commonly known as side-lasting machines.
The side lasting involves the operation of stretching the shoe upper taut and smooth over the shank and ball portion of the last, and securing the lower margin of the upper to the sole member which is mounted upon the last bottom. In thus stretching the upper, it is essential to avoid tensioning the material to such an extent as to draw the top edge of the upper out of proper position on the last, and thus the amount of stretch which may safely be applied is usually limited. Furthermore, while the upper is thus stretched, its lower edge must be secured in place by suitable attaching means which will hold it in lasted position. The most common mode of attaching the edge of the upper to the insole is by driving tacks through the upper material and through the insole into the last, such tacks being afterward removed, in accordance with some processes of manufacture, or permanently left in position, in accordance with other methods. Another way of attaching the edge of the upper is by the use of 3 staples which are so inserted that while they do not pass completely through the sole member, they obtain a firm anchorage therein and are left permanently in place.
As more fully disclosed in my copending application, Serial No. 484,553, filed September 26. 1930, I have previously devised a practical meth- Od of lasting the toe and heel portions of a shoe whereby the lasted-in upper material at these parts of the shoe is permanently secured to the sole member without the use of metallic fasteners;specifically by the use of cement, thereby producing a shoe of superior quality. The improved character of shoes made in accordance with the method just referred to has led to the demand for a lasting process such that the sides of the shoe may be lasted without recourse to metallic fasteners of any kind, and thus the principal object of the present invention is to provide a practical method of and apparatus for side lasting a shoe, without necessitating the driving of metallic fasteners of any sort into the side portions of the shoe bottom.
In accordance with usual methods the shoe upper is first assembled with the sole member 65' upon a last of usual and ordinary construction and pulled over in any desired manner, the quarter lining and counter being preferably pulled in and held by temporary tacks. Then, following my present invention, and while the shoe is held in convenient position, preferably bottom up, I stretch the sides of the upper over the last and onto the sole member, for example, by the use of hand lasting nippers, or by any other suitable means familiar to those skilled in the art. However, in accordance with the present invention I apply pressure (beginning substantially at the start of the stretching operation) to the sides of the shoe upper, causing this pressure first to bear against the upper near the top of the last and gradually extending the pressure toward the last bottom as the pulling and stretching operation is carried on. Preferably I employ fluid pressure for this purpose applied in such a way as to exert force substantially normally to the last surface at all points, and when the stretching operation is substantially completed, this pressure has become nearly uniform at all parts of the side of the upper. In this way I make certain the maintenance of the top edge of the shoe upper at the proper point on the last, regardless of the amount of stretch exerted, and produce the maximum stretch near the lower part of the upper where it is most necessary in order to conform the upper to the curved shank and ball portion of the last. 5
Having thus stretched the upper, I hold it in stretched condition (by maintaining and preferably by further increase of the fluid pressure) and after rendering the inner surface of the lower margin of the upper and/or the opposed surface 91:)
of the insole sticky or adhesive, for example, by coating one or both of such surfaces with rubber latex or other cement which dries quickly, particularly in the presence of heat, I cause a set of wiper fingers (preferably heated) to advance into engagement with the margin of the upper so as to wipe the latter in onto the sole member, such wipers being arranged to exert a very substantial and preferably progressively increasing pressure upon the upper material as they advance. These wipers are so arranged, and the upper is so protected, that they only contact with the marginal material which is to be wiped in and thus, even if heated, will not injure the appearance or finish of the exposed parts of the completed shoe. The wipers are now kept in the advanced position until the cement has set sufliciently to retain the shoe parts in lasted position and preferably, during this time, I move the last forcibly toward the wipers, thereby to flatten and level the wiped-in material. Preferably I last the second side of the shoe while holding the wipers in advanced position over the lasted-in material at the first side.
Since the pressure-applying devices, as well as the wipers, must conform closely and accurately to the shoe surface with which they cooperate, it is evident that they must be differently designed for use with a right and a left shoe respectively, and accordingly I prefer to provide two sets of mechanism for use by a given operator or operators, and by means of which to last right and left shoes, respectively.
While I prefer to employ heated wiper fingers, particularly when rubber latex or cement having similar characteristics is employed, I contemplate the use of unheated wipers (for example, when a preheated cement which hardens quickly after cooling is employed), and while I suggest the use of a-water filled flexible bag for applying the fluid pressure to the side of the upper, I contemplate the employment of other and equivalent means, but preferably involving fluid pressure. I further contemplate an arrangement of apparatus for lasting right and left shoes, all mounted upon the same base or support and, if desired. actuable in whole or in part by the same mechanical agencies. It is further to be understood that other specific arrangements and equivalent mechanisms than those herein specifically shown and described may be employed without departing from the spirit of the invention.
In the accompanying drawings wherein I have disclosed one desirable embodiment of the invention by way of example,
Fig. 1 is a front elevation, partly broken away and with certain parts omitted, showing apparatus embodying my present invention and designed for lasting a left shoe, the parts being shown in the position which they occupy at the beginning of the lasting operation;
Fig. 2 is a vertical section substantially on the line 2--2 of Fig. 1;
Fig. 3 is a fragmentary bottom plan view showing the pressure-applying bags and wipers retracted from the shoe, the latter being mounted upon the supporting back ready for the beginning of the operation;
Fig. 4 is a view similar to Fig. 3 showing the right-hand set of lasting wipers as advanced over the shoe bottom in the position which they occupy at the completion of the side lasting on the righthand side of the shoe as viewed in this figure, while in the opposite side the pressure-applying device is in contact with the side of the shoe and the upper is just being stretched by the operator;
Fig. 5 is a fragmentary transverse vertical section, to larger scale, showing one of the movable carriages with its pressure bag and wipers;
Fig. 6 is a horizontal section, with certain parts omitted, substantially on the line 6-6 of Fig. 1;
Fig. '7 is a side view of the pressure-applying bag partly in vertical section;
Fig. 8 is a plan view (omitting parts) illustrating the carriages which support the pressureapplying means, together with the portion of the mechanism for actuating the carriages;
Fig. 9 is a section substantially on the line 9-9 of Fig. 8 illustrating certain details of the carriage-actuating mechanism;
Fig. 10 is a fragmentary vertical section on line 1010 of Fig. 1 showing the guideways which support the wiper carrier;
Fig. 11 is an inside elevation of the wiper carriage and heater device but omitting certain parts;
Fig. 12 is an end elevation of one of the wipersupporting carriers, certain of the parts being omitted; and D Fig. 13 is a diagrammatic plan view illustrating mechanism for lasting right and left shoes mounted upon the same base.
Preferably the apparatus is so arranged as to hold the shoewith its bottom side up while lasting it, as in a bed lasting machine, but when hereinafter I refer to the bottom" of the last, I intend thereby to indicate that surface of the last which receives the insole, and when I refer to the top of the shoe upper, I thereby mean that part which is at the top of the shoe when the latter is in use. Also in referring to the inner side of the shoe I mean that side thereof which is at the inner side of the foot when worn, and in the description of the machine operation I indicate motion of parts toward the last as inward and movements of parts away from the operator as rearward.
As herein disclosed my improved apparatus comprises a frame having a top member or table 1 supported upon front legs 2 and rear legs 3. At a point near the lower ends of the legs the latter are connected by a shelf or platform 4 designed to support a portion of the operative mechanism.
The table 1 carries the machine head 5.which is secured to the table by means of bolts or in any other suitable manner and, if desired, a wedge may be interposed between the head and table to tilt the head forwardly, although this is not essential. The head, which is preferably a casting, includes an upright hollow column 6 having, near its top, a forwardly projecting boss 7 which carries a pivot pin 8 on which a jack-supporting bracket 9 is pivotally mounted. This jack-supporting bracket is arranged to swing in a vertical plane, but is normally held substantially in the position shown in Fig. 2- by means of a coiled tension spring 10 which is attached to the righthand end of the bracket 9, as indicated in Fig. 2, and which extends downwardly through the column 6 to a fixed point of anchorage near the lower end of the latter. The bracket 9 supports a horizontally slidable carriage 11 which may be adjusted in the front to rear direction by means of a hand wheel 12 and a screw-threaded shaft. The carriage 11 carries the jack 13 which is vertically adjustable in the carriage and may be held in adjusted position by means of set screw 14. This jack 13 is of a type commonly employed in shoemaking apparatus for supporting a last and includes a spindle 13 which fits within the socket provided for this purpose in lasts of ordinary con struction. A last L is indicated in Fig. 2 as mounted on the jack, and as illustrated in Fig. 5, the last carries a shoe upper U and the insole S.
The head 5 also comprises a pair of upwardly extending bracket arms 15 disposed at opposite sides of the jack-supporting bracket 9 and these arms support a substantially horizontal base member 16 upon which carriages 1'7 and 18 are mounted.
Referring to Fig. 8, the carriages 1'7 and 18 are furnished with horizontal arms 19 and 20, respectively, provided on their inner faces with racks which mesh with a pinion 21 mounted on a vertical shaft 22 journaled in an opening in the base member 16. Below this base member the shaft 22 carries a second pinion 23 which meshes with rack teeth 24 on the side of a rack bar 25 mounted to slide in a guideway 26 secured to the under surface of the base 16. The rack bar 25 is also furnished with rack teeth 27 on its under side, meshing with a gear sector 28 fixed to a shaft which turns in a bearing 29 carried by a bracket 30 projecting from the rear part of the column 6. The shaft which carries the sector 28 is furnished at its opposite end with a lever arm 31 to which a link 32 is suitably secured. This link extends downwardly to a point below the shelf 4 and is pivotally secured at its lower end to a treadle lever 34 pivotally secured at its rear end upon a shaft 35 which is supported by brackets carried by the rear legs 3.
At its forward end the pedal lever 34 extends outwardly through a vertical slot 36 in a plate 37 attached to the forward edge of the shelf 4 and depending from the latter substantially to the floor on which the machine rests. The forward end of the pedal lever is furnished with a foot treadle 38, and preferably one edge of the slot 36 is furnished with detent teeth 39 with which the upper edge of the lever 34 may be engaged by a slight lateral movement of the lever such as is permitted by lost motion in its pivotal bearings, whereby the pedal lever may be locked in selected depressed position.
Since these carriages l7 and 18 and the parts carried thereby are substantial duplicates of one another, except as in such slight details as hereinafter referred to, the further description is confined to the carriage 17.
The carriage 17 comprises an inner substantially vertical wall 40 (Fig. 11) having a slot 41 therein for the passage of a bolt 42 which is screw threaded for engagement in a threaded opening in a plate 43 disposed at the outer side of the member 40. The plate 43 is held in adjusted position against the member 40 by means of bolts 44, while the bolt 42 is held locked in adjusted position in the plate 43 by means of a suitable locking nut. The inner end of bolt 42 is furnished with a ball 45 which enters a socket in a block 46, the latter being secured to a bracket member 47 which is thus supported by the bolt 42 for universal tilting movement.
The bracket 47 carries an abutment plate 48 (Fig. 5) against which an inflatable pressureapplying bag 49 rests. This bag is preferably of rubber or other suitable elastic and stretchable material and, in front to rear section, is of substantially the contour illustrated in Fig. 7. Preferably this bag is furnished with one or more substantially horizontal septums 50, 51, etc., dividing the bag into a plurality of compartments, each extending longitudinally of the bag. Each septum is furnished with an orifice 52, 53, etc., while the wall of the lower compartment is provided with a nipple 54 for attachment of a fluidsupplying pipe 55. Preferably, the orifice in the lowermost septum is of larger diameter than that in the septum next above it, with a further progressive decrease in the size of the orifices if a greater number of septums are employed, and as illustrated in Fig. 7, it is preferred to stagger the orifices so that fluid passing from one compartment to the next must traverse substantially the entire length of one compartment before flowing through the next orifice.
The upper surface 56 of the bag is shaped sub stantially as illustrated in Fig. 7 so as to conform more or less closely to the contour of that side of the shoe bottom which is in proximity thereto, it being understood that the upper wall of the bag at opposite sides of the last will be differently contoured to correspond to the inner and outer sides of the last. Preferably, that side of the bag which is opposed to the last is protected by means of a piece 57 of leather, textile fabric, or other flexible material which is secured at its lower part, by means of a clamping plate 58, to the abutment plate 48, while its upper part is clamped by means of a shield plate 59 to the abutment plate 48. Preferably, this shield plate 59 extends substantially across the upper edge of the bag so as to protect the bag from direct contact with the heated wipers hereafter described and to form a guide for such wipers.
A fluid supply pipe 55 is connected to the nipple 54 and extends downwardly to a Y-connection where it joins a similar pipe from the other bag, and then extends down to a T-connection 55*, one branch of which is connected by a pipe 55 to a cylinder 60. This cylinder is mounted on the shelf 4 and is provided with a piston 61 having a piston rod 62 surrounded by a coiled spring 63 normally tending to move the piston rearwardly in the cylinder. At its rear end, the piston rod 62 is connected to the upper end of one arm 64 of a bell crank lever comprising a sleeve 65 mounted to turn upon a shaft 66 supported in brackets 67 projecting rearwardly from the rear legs 3. This bell crank lever comprises a second upstanding arm 67 to which a link 68 is pivotally connected. The opposite end of this link is pivotally secured to an arm 69 of a treadle lever mounted upon a stub shaft 70 carried by a bracket 71 secured to the under side of the shelf 4. This treadle lever has a forwardly extending arm 72 passing outwardly through a slot 73 in the plate 37 and carrying a treadle 74 at its forward end. One edge of the slot 73 is preferably furnished with detent teeth 75 for retaining the treadle lever in depressed position.
The T-connection 55", above referred to, has a horizontal branch '76 which is connected to a second T-connection 77 from which a pipe 78 extends upwardly to a reservoir 79 mounted on a bracket carried by one of the rear legs 3, such reservoir being in the form of a cylinder having a piston 80 therein. This piston may be depressed by means of a screw-threaded shaft 81 having a hand wheel 82 so that by turning the hand wheel force may be applied to the contents of the reservoir 78 to force the contents thereof into the cylinder 60. This reservoir is intended to provide a supply of pressure fluid which may be fed to the pressure system as desired in order to make up for leakage or other losses therein.
The carriage 17 is furnished withan upper, inclined guide surface 83, preferably divided by a slot 84 designed to accommodate certain of the parts of the mechanism, and has an upstanding rib 85 also divided by this slot. This rib is undercut at its opposite edges to form a dovetail connection with a sliding wiper carrier 86 which is adapted to slide inwardly and downwardly upon the surface 83 of the carriage 17. This carrier 86'is furnished with an outstanding ear 87 disposed in the plane of the slot 84, and to this ear is pivotally secured one end of a universal Joint connection 88 to the other end of which is secured an operating lever 89. This lever is pivotally connected to a bracket 90 mounted on the carriage l7, and is furnished at its forward end with a handle 90 disposed in a convenient position to be grasped by the operator. Preferably, a guide plate 90 is secured to the forward edge of the base member 16 and has a horizontal slot 90 through which the lever 89 passes and which is adapted to support and guide such lever in its movements. Movement of this lever about its pivotal support on the bracket causes the carrier 86 to slide in and out along the inclined guidesurface 83, the universal joint connection between the lever and the carrier permitting this movement without cramping.
The carrier 86 comprises an outer portion 91 which is adjustably secured to the bodyof the carrier by bolt and slot connections or the like and the upper surface of part 91 is of substantial contour, indicated at Fig. 13. This part 91 has an upstanding rim 92 defining the outer edge of a trough 93 which is adapted to receive the downturned toes of a series of wiper fingers 95. Each wiper finger is provided with a boss 96 having an opening extending downwardly therethrough for the reception of a bolt 97 having a head 98 at its upper end and which is encircled by a coiled compression spring 99 bearing at its upper end against the under side of the carrier and at its lower end against a nut 100 at the lower end of the bolt.
The inner ends of the wiper fingers 95 (such inner ends constituting the wipers, proper) normally rest upon and slide across the upper surface 101 of a supporting member 102 having downwardly directed legs 103 which are adjustably secured to upstanding lateral flanges 40 projecting outwardly from the member 40 of the carriage 17, the legs 103 being vertically adjustable in slots in the member 40 by means of retaining bolts 103. When properly adjusted the surface 101 is slightly below the surface of the shield plate 59 and also below the level of the exposed surface of the insole on the last.
The support 102 preferably is furnished with a chamber for the reception of a heating element 105 so as'to heat the wipers during the time that they rest on the support. As here shown, this heating element consists of an electrical resistance coil receiving energy through a cable 106 leading to a control box 107 secured to the righthand edge of the table 1. This control box'may contain any desired switch and rheostat mechanism for controlling the amount of current delivered to the heating coil and receives current through a cable 108 from any suitable source.
In order to keep the inner end portions of the wiper fingers 95 in proper position in a front to rear direction the support 102 is furnished with set screws 102 which in efiect define the front and rear edges of a channel in which the inner ends of the fingers 95 are guided, the surface 101 which constitutes the floor of the shallow channel being curved in a longitudinal direction in accordance with the contour of the lower part of the adjacent side of the last.
The inner ends 95" of the fingers 95 are preferably curved upwardly as shown in Fig. 5 and are adapted to ride over the guard plate 59 and to fold or wipe in the margin of the upper material. For holding the inner ends of the wipers downwardly to bring pressure upon the foldedover upper material, I provide each wiperwith a spring 109 secured at its upper end to a bracket 110 projecting from the under side of the wiper and anchored at its lower end to a bracket 111 secured to the carrier 86. As the ends of the wipers advance, they engage the guard plate 59 and are raised from surface 101 and guided so as to pass easily over onto the insole as they begin to wipe in the upper. As they advance, their outer ends drop, thereby causing their advancing ends to rock and pass smoothly over the insole while keeping the point of application of the compressive force close to the edge of the shoe bottom, the advancing ends of the wipers being now wholly supported by the wiped-in material, while the springs 109 stretch and also approach the point of application of the pressure to the work, the net result being to apply a progressively increasing pressure to the wiped-in material.
A bracket 112 projects from the rear part of the member 16 and supports a hydraulic cylinder 113 having a piston 114 therein provided with a piston rod which carries a saddle member 115. This saddle member is preferably more or less V-shaped in transverse section and covered with suitable cushioning material such, for example, as leather or rubber, adapted to contact with the cone portion of the last. A flexible pipe 116 extends downwardly from the lower end of the cylinder 113 to a T-connection 117, one branch of which is secured to the T-connection 77 and another branch of which is connected by a pipe to a cylinder 118 mounted on a shelf 4. This cylinder 118 (Fig. 6) has a piston 119 with a piston rod 120 which is encircled by a coiled spring 121 tending to push the piston rearwardly. The rear end of the piston rod 120 is pivotally connected to the upper end of an arm 112 of a bell crank lever comprising a sleeve 123 mounted to turn on the shaft 66 and having a second arm 124 connected by a link 125 to an arm 127 of a treadle lever pivoted on a stub shaft supported by a bracket 128 carried by the shelf 4. This treadle lever has a forward arm 129 projecting out through a slot 130 in the plate 37 and is furnished at its forward end with a treadle 131. The edge of the slot 130 may be provided with detent teeth 132 for holding the treadle lever in depressed position.
The apparatus hereinabove illustrated and described is designed for lasting 'a left shoe, the pressure-applying bags, and the guides for the wipers being properly shaped for lasting a left shoe. While it would be possible to provide interchangeable guides for the wipers, together with appropriate pressure bags so that the same machine could be used for lasting both left and right shoes, I prefer to provide two separate sets of mechanism, preferably mounted on the same base,-each of the same general construction as hereinabove described,-one of such mechanisms being properly fitted for lasting left shoes and the other for lasting right shoes, thus avoiding the necessity for adjustment or interchange of parts in shifting from right to left shoes. Obviously one operator may use one set of mechanism for lasting left shoes, and another operator may use the other mechanism for lasting right shoes, but preferably the same operator will use both mechanisms alternatively.
In Fig. 13 I have diagrammatically illustrated a suitable arrangement of two such mechanisms M and N for lasting right and left shoes, respectively, mounted upon the same base Q. If desired, automatic means may be provided for releasing the shoe from one mechanism when the operator has completed his work on a shoe in the other set'of mechanism.
The operation of lasting, in accordance with the present method and by the apparatus disclosed is substantially as follows, it being assumed that at the beginning of the operation the machine parts occupy the positions shown in Figs. 1 and 3, respectively, and that a shoe upper U and an insole S have been assembled upon the last L and pulled over in any usual or desired manner, it being noted that if the pulling over operation is properly done, the upper will be disposed in proper position on the last, with its top edge properly positioned at each side of the last.
The operator takes the last with its assembled upper and insole and mounts it upon the spindle 13 of the jack 13, adjusting the jack so as to bring the ball portion of the shoe substantially in line with the central wipers, as indicated at B in Fig. 4, and adjusting the jack up or down, as experience may indicate to be desirable and in accordance with the size of the shoe to be operated upon,--at the" same time adjusting the saddle 115 to the desired point to support the forward part of the shoe at the proper level. If the quarter lining and forward corners of the counter have not already been lasted in, the operator may now perform this operation, inserting a temporary tack at each corner of the counter to hold these parts in place.
The operator next depresses the treadle 38, thus causing the carriages 17 and 18 to approach each other, thereby bringing the pressure-applying bags 49 into contact with the opposite sides of the shoe upper. Having locked the treadle 38 in its depressed position by causing the lever to engage one of the detent teeth 39, the operator seizes the upwardly projecting margin of the shoe upper at one side of the last by means of lasting pinchers P or otherwise, and draws the upper taut and snug about the side of the last in a manner well understood by skilled lasters. Before exerting substantial pull on the upper in this manner, the operator depresses the treadle 74, thus forcing the piston 61 forwardly in the cylinder 60 and thereby driving pressure fluid, for example, water or oil, upwardly through the pipe 55 into the bags 49.. The pressure fluid first enters the lower compartment of the bag and expands the inner wall of said compartment so as to exert substantial clamping pressure against the shoe upper near the top of the last. This holds the top edge of the upper at the position in which it was located by the operator during the pulling over operation, that is to say, in that position wherein the top edge of the upper is disposed in proper symmetrical relation with reference to the last and such as results from the operation technically known as spindling. Since the upper is thus clamped at its extreme top before the operator begins to exert any substantial strain on the upper, such strain does not displace the upper from its original properly placed position.
As the operator continues to exert pull on the upper, the pressure of the fluid in the bag gradually extends over an area which progressively advances downwardly toward the bottom of the last or, as viewed in Fig. 5, for example, upwardly from compartment to compartment of the bag. Thus, during the pulling and stretching operation the stretching may be continued at the lower margin of the upper where it is most necessary and where the upper must be caused to conform to the sharp curvature at the shank and ball of the shoe, while the top parts of the upper are clamped and held against excessive stretch.
When the upper has been pulled snugly about the last at one side of the latter as described, the operator applies some suitable adhesive, either to the inner surface of the upstanding margin of the upper, or to the margin of the insole or to both, one such adhesive being rubber latex, although I contemplate the use of other adhesives as being suitable for the purpose. After the opposed surfaces of the marginal material and insole have been made sticky, the operator seizes the handle at that side of the machine at which the shoe has now been drawn snugly over the last, and advances the wiper carrier 86 inwardly, thus causing the wipers (which have become heated by contact with the support 102) to move inwardly over the guard plate 59 and into contact with the upstanding margin of the upper. It is to be noted that at this time substantially the entire lateral area of the upper, from its top edge substantially to the point at which it engages the outer edge of the insole, is firmly clamped in its taut condition so that it can not contract during the wiping operation. The wipers eventually take up some such position as indicated in dotted lines in Fig. 5.
It will be noted that the springs 109 pull the wipers down flrmly toward the surface 101, but that as the wipers move inwardly, no further support is furnished by the surface 101, so that the free ends of the wipers exert a progressively increasing component of force in a direction substantially perpendicular to the bottom face of the insole. During the inward movement of the wiper carrier it descends, thus, as above described, rocking the advancing ends of the wipers so that they ride easily and smoothly over the insole, the action of the springs 109 becoming 106 more and more pronounced as the wipers advance.
Preferably the operator lasts the inner side of the shoe first, since this is the more difiicult operation, and while he is lasting the opposite 110 side of the shoe he leaves the wipers in advanced position at the inner side to insure a thorough setting of the cement. The operator now proceeds to last the other side of the shoe in accordance with substantially the same series of steps. 11
However, at this time the right-hand bag is already inflated, but I flnd that the progressive inflation of the bag, as already described, apparently produces a certain degree of stretch in the upper, or at least conforms it to the last, so that I the operator is able to complete its stretching at the lower margin of the upper without releasing the pressure, the outside of the shoe being relatively easy to last. The wiper carrier at the right-hand side of the machine is now moved inwardly by the operator, wiping in the righthand side, as viewed in Fig. 2. When both sets of the wiper carriers have been moved inwardly to their inner limit, the operator then depresses the treadle 131, delivering pressure fluid to the cylinder 113 which raises the saddle 115 and presses the forward part of the last L upwardly with great force against the wipers, such movement of the last being permitted by the pivotal support of the bracket 9. This high pressure exerted upon the wiped-in material, which is held downwardly by the heated wipers, very quickly completes the setting of the adhesive and at the same time irons the marginal material down tompletion of the operation on the right shoe may be made automatically to release the left shoe, and vice versa.
When the shoe is now removed from the machine, it will be found to have its lateral margins stuck down firmly and securely at all points along the sides of the shoe, and flattened and leveled in a manner which is superior to that produced by any machine operation now known to me, while at the same time it is free from metallic fasteners along its sides.
While I have herein illustrated one desirable embodiment of the machine by way of example, I wish it to be understood that the invention is not limited to this particular embodiment, but that variations in detail, structural arrangement of parts, and the substitution of equivalents may be made without departing from the spirit of the invention.
I claim:
1. That method of side lasting shoes without using any substantial number of metallic fasteners at any stage of the process which comprises as steps assembling an upper and insole upon a last, clamping the upper against the lateral surface of the last by the use of clamping devices devoid of upper penetrating elements, subsequently gripping the lower edge portion of the upper and stretching it taut against the lateral surface of the last by a direct and positive lasting pull, causing the inner surface of the margin of the upper to become sticky, folding such margin over onto the insole, and holding such margin under pressure until it is permanently united to the insole.
2. That method of side lasting shoes without the use of metallic fasteners which comprises as steps stretching the upper taut against the lateral surface of the last by gripping the lower portion of the upper and exerting direct mechanical pull thereon, and, while holding the upper stretched by the use of devices which do not penetrate the upper, wiping in the margin of the upper/onto the insole, causing the opposed surfaces of such margin and insole to become sticky at some stage of the operation, and thereafter subjecting said margin to heat and pressure until it is permanently united to the insole.
3. That method of side lasting shoes which comprises as steps pulling an upper over a last having an insole mounted thereon, lasting in the quarter lining and counter, applying pressure to the side portion of the upper to clamp the upper firmly against the last surface, and, while maintaining such pressure, wiping in the lower margin of the lateral portion of the upper over onto the insole and holding it under heat and pressure until it has set in position.
4. That method of side lasting shoes which comprises as steps pulling an upper over a last having an insole mounted thereon, securing the forward ends of the counter in lasted position, clamping the top portion of the upper against the last, stretching the lower part of the upper taut over the lower part of the last by a direct pull applied to the lower part of the upper, applying adhesive to the margin of the upper wiping in the margin of the upper over the insole, and maintaining said wiped-in margin under heat and pressure until the adhesive material has substantially set in lasted position.
5. That method of lasting shoes which comprises as steps assembling an upper and an insole upon a last, applying pressure to that part of the upper adjacent to the top of the last whereby to clamp such part of the upper in predetermin d position against the last, gripping the lower portion of the upper and stretching it taut by force positively applied to its free lower edge so as to bring it into close contact with the lower portion of the lateral surface of the last, clamping the lower part of the stretched upper against the last, wiping in the margin of the upper onto the insole, causing the opposed surfaces of the insole and wiped-in material to become sticky at some stage in the process, and holding the wiped-in marginal material under heat and pressure until it is permanently united to the insole.
6. That method of lasting shoes which comprises as steps assembling an upper and insole upon a last, applying pressure by means of a fluid medium to the upper throughout an area extending longitudinally of the upper near the top of the last, gripping the lower edge of the upper and stretching it by a positive pull while causing said area progressively to advance toward the last bottom, and while maintaining such pressure, wiping in the margin of the upper over the last bottom.
'7. That method of lasting shoes which comprises as steps pulling the upper over a last having an insole mounted upon its bottom, applying lateral pressure to the side portions of the upper at points-near the top of the last while leaving the lower portion of the upper relatively free, stretching the upper by force applied to its lower edge so as to draw the upper taut about the shank portion of the last, and, while so stretching the upper, causing the point of application of the lateral pressure to advance progressively toward the bottom of. the last.
8. That method of lasting shoes which comprises as steps assembling an upper and insole upon a last, applying pressure to the upper in a direction substantially normal to the surface of the last at points near the top of the last, gripping the upper near its lower edge and exerting a positive pull thereon to stretch and draw its lower portion taut about the last, applying a quick setting cement to the inner surface of the lower margin of the upper, laying said margin into contact with the'surface of the insole, and applying pressure and heat to said margin to cause it permanently to adhere to the insole.
9. That method of lasting shoes which comprises as steps assembling an upper and insole upon a last, applying pressure to the upper in a direction substantially normal to the surface of the last at points near the top of the latter, gripping the upper near its lower edge and exerting a positive pull thereon to stretch and draw its lower portion taut about the last, applying cement to the inner surface of the margin of the insole, moving an elongate wiper longitudinally into contact with said margin for folding the margin over onto the insole, causing the advancing end of the wiper to press forcibly against the margin in a direction toward the surface of the insole, and while so advancing it depressing its outer end and thereby rocking its work-engaging end to insure a smooth advance, and thereafter holding such margin under pressure by the wiper until the cement has set.
10. That method of lasting shoes which comprises as steps assembling an upper and insole upon a last, applying pressure to the upper in a direction substantially normal to the lateral surface of the last, gripping the upper near its lower edge and exerting positive pull thereon to stretch and draw its lower portion taut about the last, engaging a heated wiper member with the lower margin of the upper and causing said wiper memher to advance laterally over the surface of the insole with increasing pressure toward the surface of the insole while rocking the advancing end of the wiper whereby to. fold in the margin of the upper and lay it flat and smooth against the surface of the insole.
11. That method of lasting shoes which comprises as steps assembling an upper and insole upon a last, gripping the upper near its lower edge and exerting a positive pull thereon to stretch and draw its lower part taut about the last, applying cement to the inner surface of the margin of the upper, wiping in such margin over the surface of the insole while applying constantly increasing pressure to such margin in such a direction as to force it into contact with the insole, and maintaining such pressure until the margin has set in lasted position.
12. That method of side lasting shoes which comprises as steps assembling an upper and insole upon a last, gripping the upper near its lower edge and exerting a positive pull thereon to stretch and draw its side portions taut about the sides of the last, applying adhesive to the inner surface of the upper along its margin, and wiping such margin, at the sides of the shoe, inwardly over the surface of the insole by the application of force having components substantially perpendicular and transverse to the insole, respectively, that component of force which is perpendicular to the insole being progressively increased as the wiping in operation proceeds, and maintaining the final pressure until the adhesive has set.
13. Apparatus for side lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, means for holding the top portion of a side of the upper in predetermined position on the last while stretching said side of the upper taut over the last, and means operative to apply heat and pressure to the margin of the upper while holding such margin in contact with the insole.
14. Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, pressure applying means comprising an expansible bag engageable with the shoe upper, said bag having a plurality of compartments, and means operative to inflate said compartments successively whereby to apply pressure first to one portion of the shoe upper and then to another.
15. Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, pressure applying means comprising a plurality of fluid compartments each having an expansible wall engageable with a part of the shoeupper, said compartments being disposed at different levels relatively to the height of the shoe last, and means operative to deliver pressure fluid successively to said compartments beginning with the compartment disposed nearest to the top of the last and finishing with the one disposed nearest the lower edge of the last.
16. Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, pressure applying means comprising an expansible bag engageable with the shoe upper, said bag having a plurality of septums dividing it into separate compartments, said compartments extending longitudinally of the last and being disposed at different levels as referred to the height of the last, said septums having orifices of predetermined capacity therethrough, and means for delivering pressure to that compartment nearest the top of the last, the orifices permitting said fluid to pass progressively from one compartment to the next.
17. Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, pressure applying means comprising a fluid-tight expansible bag having one side thereof disposed adjacent to the side of the shoe upper, a rigid abutment for the other side of the bag, a septum dividing the interior of the bag into compartments, said septum having an orifice therethrough, and means for forcing pressure fluid into one compartment of the bag, the orifice permitting the fluid to pass at a predetermined rate into the other compartment. I
18. Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, pressure applying means comprising a fluid-tight receptacle having at least one side which is expansible when exposed to internal pressure, said side being engageable with the shoe upper, a plurality of septums dividing said receptacle into compartments extending longitudinally of the shoe and disposed at different levels as referred to the height of the last, eachseptum having an orifice therethrough, the orifices being of progressively smaller size in successive septums progressing from the upper toward the lower part of the last, said orifices being staggered relatively to each other, and means for delivering fluid under pressure to the compartment nearest to the top of the last.
19. Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, pressure applying means disposed at opposite sides-of the shoe upper at the shank and forepart portion thereof, each such pressure applying means comprising an inflated bag, means supporting each bag for bodily movement toward and from the last, means for bodily moving each bag toward and from the last, means for locking each bag in 0perative position relatively to the last. and means actuable by the operator for inflating said bags.
20. Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, an elongate wiper for wiping in a portion of the margin of the shoe upper at the side of the shoe, a heated support for the wiper on which the wiper rests when retracted from the work, said support being at a lower level than that of the exposed surface of the insole, means for advancing the wiper over the insole while causing the wiper to apply progressively increasing pressure in a direction toward the bottom of the insole, and means causing the outer end of the wiper to descend and thereby rocking its work-engaging end so as to maintain the point of maximum pressure adjacent to the edge of the insole.
21. Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, an elongate wiper for wiping in a portion of the margin of the upper at the side of the shoe, said wiper having a curved work-engaging end, means for advancing the wiper over the insole, and resilient means operative to cause the work-engaging end of the wiper to exert a progressively increasing pressure upon said marginal material. and means for rocking the work-engaging end of the wiper as it advances.
22. Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, a rigid wiper member having a work-engaging end engageable with a portion of the lower margin of the shoe upper at the side of the latter, a heated support on which the work-engaging end of the wiper rests when in inoperative position, said support being at a lower level than the exposed surface of the insole, means for guiding the work-engaging end of the wiper up and onto the insole as the wiper is advanced, means for advancing the wiper, and means for pressing the wiper forcibly against the marginal material as the wiper advances.
23. Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, and a series of heated wipers arranged side by side and movable inwardly over the bottom of the shoe to wipe in the margin of the upper, means normally supporting the work-engaging ends of the wipers at a level lower than that of the insole, resilient means constantly urging said advancing ends downwardly, means for guiding the wipers each in a path such that their advancing ends all move inwardly across the edge of the insole at substantially the same distance from the latter, and means operative to cause the advancing ends of the several wipers to move nearer and nearer to the insole as they advance, whereby to exert progressively increasing force upon the margin of the upper.
24. Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, a series of heated wipers disposed at each side of the shoe respectively, means for guiding each set of wipers so that as the wipers advance over the insole their advancing ends move freely across the edge of the insole but thereafter. approach the latter, means for heating the wipers, and means for simultaneously advancing the wipers of a set over the insole to wipe in and press the margin of the upper into contact with the insole.
25. Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, a series of heated wipers disposed at each side of the shoe, means for guiding each series of wipers so that as they advance over the insole their advancing ends move freely across the edge of the insole, a movable carriage supporting each series of wipers, means for moving the carriages toward the last, and independent means operative tomove the wipers of eitherse ins inwardly over the insole.
26. Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, a series of wipers, a movable carriage supporting the wipers, a wiper guide over which the wipers move, the wiperengaging surface of the guide being longitudinally curved in accordance with the longitudinal contour of the bottom of the shoe last at that side of the last at which such guide is disposed, and means for simultaneously moving said wipers to cause their end portions to advance over the insole as they move transversely across the guide.
2'7. Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, a series of elongate wiper fingers, each having a rounded work-engaging surface and movable longitudinally to cause its work-engaging surface to move over the insole, a carrier for the wiper fingers, means for moving the carrier whereby to cause the workengaging surfaces of the wiper fingers concomitantly to advance transversely over the insole and to approach the surface of the insole.
28. Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, a series of wipers, each movable in the direction of its length to cause its advancing end to project inwardly over the edge of the insole, a carrier for the wipers, means for moving the carrier whereby simultaneously to advance all of the wipers, and inclined guide means for the carrier so arranged that the advancing ends of the wipers are caused to rock as they move transversely over the insole surface.
29. Apparatus for lasting shoes comprising means for supporting a last having a shoe upper and insole assembled thereon, a series of elongate, longitudinally movable wipers for wiping in the margin of the upper over the insole, normally spaced supporting means for each wiper, one of said supporting means being stationary and adjacent to the last and the other of said supporting means being movable toward and from the last, spring means for applying operating force to said wipers, said spring means being so arranged as to apply increasing force as the wiper advances, such force having a component tending to move the wiper transversely over the insole and having a progressively increasing component which tends to press the advancing ends of the wipers into contact with the insole.
30. Apparatus of the class described comprising a last-supporting jack, pivotal means upon which the jack may swing in a front to rear direction, wipers for wiping in the lateral margins of a shoe upper mounted on the last, a saddle for supporting the forward end ofthe last, a hydraulic cylinder having a piston therein, the piston being connected to the saddle, and means for supplying L30
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697844A (en) * 1948-11-08 1954-12-28 Auman Irwin Lasting machine
US2768396A (en) * 1953-11-24 1956-10-30 United Shoe Machinery Corp Machines for shaping uppers over lasts
US3255475A (en) * 1959-07-01 1966-06-14 Ralphs Unified Ltd Apparatus for lasting footwear
US3256543A (en) * 1964-10-30 1966-06-21 Ralphs Unified Ltd Machines for lasting footwear

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697844A (en) * 1948-11-08 1954-12-28 Auman Irwin Lasting machine
US2768396A (en) * 1953-11-24 1956-10-30 United Shoe Machinery Corp Machines for shaping uppers over lasts
US3255475A (en) * 1959-07-01 1966-06-14 Ralphs Unified Ltd Apparatus for lasting footwear
US3256543A (en) * 1964-10-30 1966-06-21 Ralphs Unified Ltd Machines for lasting footwear

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