Method and machine for cement lasting

Abstract

A lasting machine that applies cement into the corner between a portion of the margin of an upper mounted on a last and an insole located on the last bottom and that wipes the margin portion against the insole so as to cementatiously attach the wiped margin portion to the insole.

I claim: 
     
       1. In a lasting machine, operable on a shoe assembly formed of a last having an upper mounted thereon and an insole located on its bottom, for performing operations on the opposite side portions of the shoe assembly that includes engaging the shoe assembly and wiping the margins of selected opposite side portions of the upper against the corresponding portions of the insole, that comprises: support means for so supporting bottom-up the shoe assembly that the toe of the shoe assembly faces forwardly with said margin portions extending upwardly of the corresponding portions of the insole periphery; a base, mounted for inward-outward movement, located outward of and on each side of the support means; a lasting instrumentality mounted to each base for inward-outward movement; means so constructing each lasting instrumentality as to enable it, when it is moved inwardly of an outer position on its base, to perform said operations on its associated side portion of the shoe assembly; means for initially maintaining each base in an outer position with respect to the support means and for initially maintaining each lasting instrumentality in its outer position with respect to its associated base so that the shoe assembly may be placed on the support means; means for thereafter moving each base inwardly to an inner position wherein its associated lasting instrumentality is close to but not in engagement with the shoe assembly; and means for thereafter moving each lasting instrumentality inwardly of its outer position with respect to its associated base to cause it to perform said operations on the shoe assembly; the improvement wherein said support means comprises: means supporting the toe portion of the shoe assembly for lateral movement in two opposite lateral directions; and further comprising: means for selectively moving said toe portion laterally in one of the other of said lateral directions prior to the movement of the bases to their inner positions. 
     
     
       2. The mechanism of claim 1 wherein said means supporting the toe portion of the shoe assembly for lateral movement in said lateral directions comprises: a last pin adapted to be inserted into the back portion of the last so as to enable the last to swing laterally; and a toe rest assembly, adapted to support the vamp of the shoe assembly, located forwardly of the last pin, mounted for lateral movement; and wherein said means for selectively moving said toe portion laterally comprises: a rod, mounted for lateral movement, located on each side of the toe rest assembly; and means for selectively moving each of said rods into engagement with the toe rest assembly. 
     
     
       3. The mechanism of claim 2, further comprising: a plate located forwardly of the last pin; wherein said toe rest assembly comprises: a mount pivoted to the plate and extending forwardly thereof; a column fixed to and extending upwardly of the mount; and a toe rest fixed to the top of said column; further comprising: a pair of wings fixed to and extending forwardly of the plate on opposite sides of the mount; a motor mounted to each of said wings, each of said motors being so constituted as to have one of said rods as its driven element; and a cam secured to said mount in intersecting relationship with respect to said wings to thereby limit the extent of pivotal movement of the mount relative to the plate pursuant to selective inward movement of the rods; and wherein said means for selectively moving said rods comprises: means for selectively actuating said motors to selectively cause the motors to move their associated rods inwardly into engagement with said mount. 
     
     
       4. In the machine of claim 1 wherein the machine is so constructed that the lasting instrumentalities, when they are moved inwardly of said outer positions, first engage said margin portions and then wipe said margin portions against the corresponding portions of the insole; wherein the machine further comprises: .Iadd.a plate mounted for movement in forward and rearward directions; .Iaddend.a block, located above the insole, mounted for movement in forward and rearward directions .Iadd.in unison with the plate .Iaddend.and mounted for .[.lateral.]. movement .Iadd.with respect to the plate .Iaddend.in two opposite .[.lateral.]. directions; a pair of nozzles mounted to the block for heightwise movement.Iadd., .Iaddend..[.and.]. for lateral inward-outward movement .Iadd.and for unitary movement in opposite lateral directions pursuant to said movement of the block with respect to the plate.Iaddend.; means for initially so locating the nozzles with respect to the block that they are in upper and inner positions with respect to the block; means for initially so locating the block that the nozzles are in prescribed forward-rearward positions; means for thereafter, and after the lasting instrumentalities have engaged said margin portions but before the lasting instrumentalities have wiped said margin portions, lowering the nozzles with respect to the block against the insole and for moving the nozzles outwardly with respect to the block into the corners between said margin portions and the corresponding portions of the insole periphery; means for thereafter moving the .Iadd.plate and the .Iaddend.block, together with the nozzles, a prescribed distance in one of said forward and rearward directions while the nozzles continue to stay in said corners and for concomitantly extruding cement from the nozzles into said corners; means for thereafter moving the nozzles inwardly with respect to the block and inwardly of said corners and for raising the nozzles upwardly with respect to the block and upwardly of the insole; and means for thereafter causing the lasting instrumentalities to wipe said margin portions against the insole; the improvement comprising: means, operative prior to the lowering and outward movement of the nozzles while the nozzles remain in their inner positions with respect to the block, for .Iadd.so .Iaddend.selectively moving the block .[., together with.]. .Iadd.with respect to the plates as to move .Iaddend.the nozzles.[.,.]. laterally in the same lateral direction in which said toe portion has been selectively laterally moved. 
     
     
       5. The combination of claim 4 wherein the machine further comprises: .[.a plate mounted for movement in forward-rearward directions; and.]. pivot means mounting the block to the plate for swinging movement about a heightwise axis that is located intermediate the lateral ends of the block; and wherein said means for selectively moving the block .Iadd.with respect to the plate .Iaddend.comprises: means for selectively swinging the block one way or the other about said axis. 
     
     
       6. The combination of claim 5 wherein the machine further comprises: a pair of motors mounted to said plate, said motors having rods that, in response to actuation of the motors, are movable in paths that are in intersecting relationship with said block on opposite sides of said axis; and wherein said means for selectively moving the block comprises; means for selectively actuating one or the other of said motors. 
     
     
       7. A method of lasting, operable on a shoe assembly formed of a last having an upper mounted thereon and an insole located on its bottom, for wiping a first portion of the upper margin on a first side of the shoe assembly that has a relatively pronounced reentrant portion against the corresponding portion of the insole and for wiping a second portion of the upper margin on the second side of the shoe assembly that has a less pronounced reentrant portion against the corresponding portion of the insole comprising: supporting the shoe assembly bottom-up with said margin portions extending upwardly of the insole; locating a first lasting tool outwardly of said first margin portion; locating a second lasting tool outwardly of said second margin portion; folding only said first margin portion part way towards the insole by causing only the first lasting tool to apply a relatively light back-up force inwardly against the exterior surface of said first margin portion; thereafter moving a nozzle along each of the side peripheries of the insole and outwardly thereof to the extent permitted by said margin portions; extruding cement from the nozzles into the angles between the insole side peripheries and said margin portions during said movements of the nozzles; and thereafter folding said margin portions against the insole by causing both lasting tools to apply relatively heavy wiping forces inwardly against the exterior surfaces of said margin portions to thereby wipe said margin portions against the insole and attach them to the insole by way of said cement. 
     
     
       8. A lasting machine, operable on a shoe assembly formed of a last having an upper mounted thereon and an insole located on its bottom, for wiping the opposite side portions of the upper margin against the corresponding portions of the insole, one of the side portions of the shoe assembly having a relatively pronounced reentrant portion comprising: a support for supporting the shoe assembly bottom-up with said margin portions extending upwardly of the insole; a lasting tool located outwardly of the support on each side of the support, each lasting tool being mounted for movement between a first position wherein it extends outwardly of an associated one of said margin portions and upwardly of the corresponding portion of the insole and a second position wherein it extends downwardly and inwardly of its first position so as to wipe its associated margin portion against the insole; means for initially locating both lasting tools in their first positions; means for thereafter moving only a selected one of said lasting tools from its first position to an intermediate position between its first and second positions by applying a relatively light inwardly directed back-up force to said selected lasting tool so as to fold its associated margin portion, on the side of the shoe assembly having said relatively pronounced reentrant portion, part way toward the insole; said margin portions providing back-ups during the movements of cement applying nozzles along the sides of the insole periphery and outwardly thereof to the extent permitted by said margin portions; and means for thereafter, after a time interval sufficient to enable the nozzles to complete said nozzle movements, moving said selected lasting tool from its intermediate position to its second position and the non-selected lasting tool from its first position to its second position by applying relatively heavy inwardly directed wiping forces to the lasting tools so as to wipe said margin portions to the insole and attach them to the insole by way of the cement. 
     
     
       9. The lasting machine according to claim 8 further comprising: control means associated with each of said lasting tools; and means responsive to the actuation of each of said control means for causing its associated lasting tool to operate as aforesaid as the selected lasting tool. 
     
     
       10. A lasting machine, operable on a shoe assembly formed of a last having an upper mounted thereon and an insole located on its bottom, for wiping the opposite side portions of the upper margin against the corresponding portions of the insole, one of the side portions of the shoe assembly having a relatively pronounced reentrant portion, comprising: a support for supporting the shoe assembly bottom-up with said margin portions extending upwardly of the insole; a heightwise extending lasting strap located outwardly of the support on each side of the support; means for initially causing each lasting strap to engage the shoe assembly with a top segment of each lasting strap extending upwardly of the insole and outwardly of an associated one of said margin portions; means for thereafter folding only a selected one of said lasting strap top segments downwardly and inwardly part way towards the insole by applying an inward back-up force to said selected lasting strap top segment to thus fold its associated margin portion, on the side of the shoe assembly having said relatively pronounced reentrant portion, downwardly and inwardly part way towards the insole; said margin portions providing back-ups during the movements of cement applying nozzles along the sides of the insole periphery and outwardly thereof to the extent permitted by said margin portions; and means for thereafter, after a time interval sufficient to enable the nozzles to complete said nozzle movements, folding said selected lasting strap top segment further downwardly and inwardly against the insole and folding the nonselected lasting strap top segment downwardly and inwardly against the insole by applying inward wiping forces of a greater magnitude than said back-up force to said lasting strap top segments to thus wipe said upper margin portions against the insole and attach them to the insole by way of the cement. 
     
     
       11. The lasting machine according to claim 10 further comprising: control means associated with each of said lasting straps; and means responsive to the actuation of each of said control means for causing its associated lasting strap to operate as aforesaid as the selected lasting strap. 
     
     
       12. The lasting machine according to claim 10 wherein said means for applying said back-up force and said means for applying said wiping forces comprise: a drive rod, located outwardly of each of said top segments, mounted for inward-outward movement; a flexible connection between each drive rod and its associated top segment; means for initially maintaining both drive rods in outer positions; means for thereafter moving a selected drive rod, associated with the selected lasting strap top segment, inwardly under a relatively low pressure to thereby effect said back-up force; and means for thereafter moving said selected drive rod further inwardly and for moving the non-selected drive rod inwardly under relatively high pressures to thereby effect said wiping forces. 
     
     
       13. The lasting machine according to claim 12 further comprising: control means associated with each of said drive rods; and means responsive to the actuation of each of said control means for causing its associated drive rod to move inwardly under said relatively low pressure. 
     
     
       14. A lasting machine, operable on a shoe assembly formed of a last having an upper mounted thereon and an insole located on its bottom, for wiping a selected portion of the margin of the upper against the corresponding portion of the insole and cementatiously attaching said margin portion to said insole portion comprising: a support for supporting the shoe assembly bottom-up with said margin portion extending upwardly of the insole; a lasting instrumentality located outwardly of the support, the lasting instrumentality comprising at least two side by side heightwise extending lasting straps that are separated from each other from their bottoms up to a point and are formed into an integral region above the point; a nozzle, located above the shoe assembly mounted for movement lengthwise of the shoe assembly; means for causing the lasting instrumentality to so engage the shoe assembly that said straps below the point are pressed against the shoe assembly, that said point is no higher than the bottom of the insole and that said integral region extends upwardly of the insole and outwardly of said margin portion; means for thereafter applying a yieldable downward force and a yieldable outward force to the nozzle to cause the nozzle to bear against the insole and against said margin portion in the corner between the insole and said margin portion; means for thereafter moving the nozzle lengthwise of the shoe assembly while said yieldable downward and outward forces are maintained and for concomitantly extruding cement from the nozzle into said corner; means for thereafter moving the nozzle inwardly of said corner and for raising the nozzle upwardly of the insole; and means for thereafter folding that part of the lasting instrumentality integral region that extends above the insole downwardly and inwardly to thus wipe said margin portion against the insole and attach it to the insole by way of the cement.