US3126563A - Wipers with gap covering bridge - Google Patents

Description

March 31, 1964 5, KAMBQRIAN 3,126,563

.WIPERS WITH GAP COVERING BRIDGE Filed Oct. 22, 1962 5 Sheets-Sheet 1 O F o l INVENTOR. Jacob S. Kambor/an March 31, 1964 J. s. KAMBORIAN 3,126,563

WIPERS WITH GAP COVERING BRIDGE Filed Oct. 22, 1962 5 Sheets-Sheet 2 E l8 /6 v if 0 O O 3 o 9 Q L March 31, 1964 J. 5. KAMBORIAN WIPERS WITH GAP COVERING BRIDGE 5 Sheets-Sheet 4 Filed 001:. 22, 1962 March 31, 1964 J. 5. KAMBORIAN 3,126,563

WIPERS wn'n GAP COVERING BRIDGE Filed Oct. 22, 19 5 Sheets-Sheet 5 FIG-8 United States Patent 3,126,563 WIPERS WITH GAP COVERING BRIDGE Jacob S. Kamhorian, 133 Forest Ave, West Newton, Mass. Filed Oct. 22, 1962, Sera'No. 232,138 1 Claim. (Cl. 12-125) This invention relates to improved wipers for use in a shoe end lasting machine such as the heel seat lasting machine disclosed in pending application Serial No. 107,156, filed May 2, 1961.

End lasting wipers conventionally have fiat coplanar undersurfaces and forwardly divergent front side surfaces adapted to embrace the end of a last having a shoe upper and insole thereon and have drive means for translating the wipers forwardly across the insole and swinging the front side surfaces toward each other about a vertex to cause the divergent front side surfaces to cross the last and wipe the lasting margin of the upper against the insole. However, during the inward movement of the front side surfaces, there is also outward movement of rear side surfaces that are located rearwardly of the front side surfaces. The separation of the rear side surfaces creates a gap, and the portion of the wiped in margin that underlies this gap does not have pressure applied to it during the forward movement of the wipers and during the application of bedding pressure after the wipers have completed their forward movement.

In pending application Serial No. 152,135, filed November 10, 1961, now Patent No. 3,083,384, there is disclosed one solution to this problem that comprises a bridging element secured to a first one of the wipers and extendin into a recess in the second wiper. The bridging element is so constructed that it projects forwardly of the second wiper in the retracted position of the wipers and retreats into the second wiper during the Working stroke of the wipers. While this arrangement accomplishes its purpose, it does have the disadvantage that the projecting portion of the bridging element on occasion interferes with other components of the lasting machine or with the shoe being lasted.

In the instant invention, the wipers have intermediate side surfaces between the rear side surfaces and the front side surfaces that diverge forwardly from the vertex to intersect the front side surfaces. A recess is provided in the undersurface of one of the wipers that extends from its rear side surface to its intermediate side surface in an are centered on the vertex. The other wiper has a bridging element that projects from it on a similar arc and is slidably received in the recess. With this arrangement the bridging element covers the gap between the wipers at all times during the forward movement of the wipers Without the bridging element projecting forwardly of the front side surfaces. The intermediate side surfaces provide clearance to enable the wipers to swing about the vertex.

Referring to the drawings:

FIGURE 1 is a side elevation of the heel seat lasting machine;

FIGURE 2 is a front elevation of the machine;

FIGURE 3 is a detail in section of a part of themachine;

FIGURE 4 is a plan view of the wiper drive'means;

FIGURE 5 is an exploded perspective view of the Wipers;

FIGURE 6 is a representation looking from above the wipers and the shoe to be lasted with the wipers in their retracted position.

FIGURE 7 is a View similar to FIGURE 6 but showing the wipers in their forward position;

FIGURE 8 is a section taken on the line 8-8 of FIG- URE' 5; and

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FIGURE 9 is a sectional side elevation of the machine parts at the completion of the wiping operation.

As aforesaid, the wipers of the instant invention may be used in a heel seat lasting machine such as that shown in pending application Serial No. 107,156, filed May 2, 1961. The machine comprises a post 10 to the upper end of which is secured a last supporting plate 12 and a last pin 14 (FIGURE 2). An upper tensioning unit 16 is mounted on the post 10. The unit 16 comprises a front pincers 18, two side pincers 20 and a toe rest 22. A block 24 is swingably mounted on the post 10 for oscillation about the axis of the post. The block has rails 26 connected thereto and extending forwardly thereof on which the unit 16 is slidably mounted for movement toward and away from the post 10. A pair of air actuated motors 28 are pivoted to the rails 26 and have piston rods 36 connected to the unit 16 to effect move ment of the unit 16 along the rails 24. The pincers 18 and 26 are mounted on a bar 32, and an air actuated motor (not shown) is connected to the bar 32 to effect upward and downward movement of the pincers 13 and 26 with respect to the rails 26.

The post lit and the upper tensioning unit 16 carried thereby are swingably mounted on a pivot 33 for bodily movement toward and away from a heel seat lasting unit 34 mounted in the frame 36 of the machine. The unit 34 comprises a U-shaped heel clamping pad 33 made of flexible material such as leather and Wipers 40, 42 mounted in wiper cams 44. A hold-down unit 46 is mounted on the frame above the unit 34. The unit 46 comprises a hold-down foot 48 that is normally located with its bottom slightly below the bottoms of the wipers and which is elevated from its normal position upon actuation of an air operated motor 56.

The post 16 is pivotally connected to a pitman 52 which in turn is operatively connected to a rack 54 whereby reciprocation of the rack by an air actuated motor 56 effects movement of the post 16 and the upper tensioning unit 16 carried thereby toward and away from the heel seat lasting unit 34 and the hold-down unit 46. The pivot 33 is located at the end of the piston rod 58 of an air actuated motor 60, the piston rod being guided in a bearing 62 mounted on the frame 36 of the machine.

The heel seat lasting unit 34 is supported on a main slide plate 64 that is slidably mounted for forward and rearward movement on gibs 66 in the frame 36 (FIG- URE 3). A block 63 is secured to the plate 64 and is slidable in a slot '76 formed in a table 72, which table forms a part of the frame 36. A floating actuator 74 is secured to the block 68. The actuator 74 comprises a bar '76 depending from and rigid with the block 68. An air operated motor 73 is pivoted to the .bar 76 and has a.

piston rod 86 extending upwardly therefrom. A pair of toggle links 82 and 3d are pivoted at their adjoining ends to the piston rod 86 and are respectively pivoted at their opposite ends to the bar 76 and to a block 86 that is located in a fixed position in the machine. Actuation of the motor 78 to open or close the toggle linkage formed by the members 86, 82 and 84 will cause the main slide plate 64 and the members carried thereby to move forwardly or rearwardly in the frame.

The legs 83 of the clamping pad 38 are connected to levers 96 (FIGURE 2) and the levers form part of a driving mechanism (not shown) mounted on the main slide plate 64 for moving the pad 38 forwardly and the pad legs 88 toward each other to clamp the heel portion of a shoe upper against a shoe last as described below.

A bridge 92 is anchored at its ends to the main slide plate 64 and extends thereover (FIGURE 4). operated motor 94 (FIGURE 1) is secured to a rib 96 at the rear of the main slide plate 64. The piston rod 98 of the motor 94 has a rack thereon that is in mesh Anair with a gear 102 rotatably mounted beneath the bridge 92 on a pin 104 in the bridge. A wiper supporting slide plate 106 is slidably supported on gibs 108 in the frame 36. The plate 1W6 has a slot 110 extending transversely to the rack 100 which receives an eccentrically mounted crank pin 112 depending from the gear 102. The piston rod 98 has an enlargement 114 to which are pivoted the ends of links 116. The opposite ends of the links are pivoted to the wiper earns 44 which mount the wipers 40 and 42. The wiper cams 44 have curved cam slots 118 with a center of curvature at a point or vertex 120 on the line of symmetry of the wipers described more fully below. The wiper cams rest on the plate 106, and the plate 106 has rollers 122 extending upwardly therefrom into the cam slots 118.

With the wipers 40, 42 mounted in the machine in their retracted positions, they respectively have rear side surfaces 124 and 126 that abut each other and forward- 1y divergent surfaces front side surfaces 128 and 130 that are away from each other.

The surfaces 128 and 138 are made similar to the heel of the last with which they coact. In addition, the wipers 40, 42 respectively have flat undersurfaces 132 and 134 located in a common plane and flat top surfaces 136 and 138 located in a common plane parallel to the plane of the wiper undersurfaces. The wipers 40 and 42 respec tively have rectilinear intermediate side surfaces 140 and 142 that diverge forwardly from the rear side surfaces 124 and 126 at the vertex 120 and intersect the front side surfaces 128 and 130 at spaced points 141 and 143 Arcuate recesses 144 and 146 are respectively formed in the wiper undersurfaces 132 and 134 (FIGURES 5 and 8).

The recesses 144 and 146 extend about halfway through the thickness of the wipers. The peripheries of the recesses 144 and 146 respectively lie on arcs that extend from the rear side surf- aces 124 and 126 to intersect the intermediate side surfaces 140 and 142 adjacent the points 141 and 143. The arcs have a center of curvature coinciding with the vertex 120. A bridging element in the form of a disc 148 is secured in the recess 146 and is received in the recess 144, the axis of the bridging disc coinciding with the vertex 120. The undersurface 150 of the disc 148 is flat and coplanar with the undersurface 134 (FIGURE 8). With the wipers in their retracted position, a portion of the periphery of the disc 148 extends between the intermediate side surfaces 140 and 142 and arcs forwardly thereof (FIGURE 6).

A last 151 is provided having an insole 152 mounted on its bottom and an upper 154 draped thereon. A liner 156 is secured to the heel of the upper to engage the heel of the last, and a counter 158 is located in the pocket formed between the upper and liner, the counter having the characteristics described in the aforementioned application Serial No. 107,156 and in pending application Serial No. 80,919, filed January 5, 1961. The last is placed bottom-up on the last supporting plate 12 with the pin 14 entering the conventional last pin hole in the last. The toe portions of the upper and last are supported on the toe roller 22, the toe of the upper margin is inserted between the jaws of the front pincers 18, the forepart portions of the upper margin are inserted between the jaws of the side pincers 20, and the pincers are actuated to cause their jaws to grip the upper margin. The motors 28 are now actuated to move the upper tensioning unit 16 and the pincers .18, 20 carried thereby forwardly to stretch the upper tightly about the heel of the last and tensionamold the counter to the shape of the heel of the last. The motor 56 is now actuated to swing the post and the upper tensioning unit 16 carried thereby toward the heel seat lasting unit 34 to a position adjacent to but not in contact with the heel clamping pad 38 wherein the post 10 is substantially in alignment with the hold-down foot 48. The motor 60' is now actuated to raise the post 10 to bring the insole 152 into engagement with the hold-down foot 48, after which the pincers 18 and 20 are raised in unison to apply an upward tension to the margin of the upper 154 at its toe and forepart portions thereby stretch the upper tightly on the last and assemble it in proper position for the heel seat lasting operation. The motor 78 is now actuated to straighten toggle links 82, 84 and thereby move the block 68 and the heel seat lasting unit 34 carried thereby from its normal, rearward, out-of-the-way position to a position adjacent the shoe and last. The driving mechanism for the heel clamping pad 38 is now actuated to cause the pad to move forwardly and the pad legs 88 to move inwardly thereby causing the pad to clamp the heel of the upper against the last as indicated in phantom in FIG- URE 6 and compression mold the counter 158 to the shape of the last.

At the completion of the clamping operation, the motor 94 is actuated to advance the piston rod 98, the rack and the piston rod enlargement 114 to cause the wipers to move from the FIGURE 6 position to the FIGURE 7 position to wipe or fold the margins of the upper 154 and counter 158 down upon the insole, as indicated in FIGURES 7 and 9. The wiping pressure completes the molding of the counter and causes the counter, through adhesive on its surface, to bond the wiped-in margin of the upper to the insole. The forward movement of the piston rod 98, through the links 116 causes the front side surfaces 128 and 130 to swing toward each other about the vertex 120 with the slots 118 swinging forwardly with respect to the rollers 122 and causes the surfaces 128, 130 to approach each other in their wiping movement across the bottom of the last. The forward movement of the piston rod 98, through the rack 100, the gear 102, the slot and the pin 112 also causes the plate 106 to move forwardly thereby providing a forward, translatory movement of the wipers as well as an inward movement about the vertex During the movement of the wipers, the front side surfaces 128 and and the portion of the periphery of the disc undersurface that extends between the intermediate side surfaces 140 and 142, across the heel of the last with the intermediate side surfaces approaching each other, the rear side surfaces 124 and 126 moving away from each other, and the disc swinging about the vertex 1120 in the recess 144. As can be seen from FIGURES 6 and 7, the disc 148 at all times covers the space between the front side surfaces 128 and 130 and the rear side surfaces 124 and 126 so that all of the wiped-in margin is covered by a uniplanar surface. The intermediate side surfaces 140 and 142 provide clearance above the disc 140 that enables the wipers 40, 42 to swing toward each other. The provision of the substantially continuous planar surface bearing against the upper margin provides for a wiping operation that effectively flattens the upper margin against the insole during the wiping operation and during the application of bedding pressure described below. Since the slot 110 extends normal to the path of movement of the piston rod 98, the movement of the slot from the rightward position of FIGURE 4 to the leftward position indicated in phantom causes the plate 106 initially to move forwardly almost as fast as the piston rod 98 and then to gradually slow down, until, towards the end of the stroke of the piston rod 98, the plate has substantially no forward movement. The result of this is that, initially, the wipers move forward with substantially no inward movement about the vertex 1'20, and at the end of the wiper stroke the wipers move toward each other about the vertex 120 with very little forward movement. This produces a wiping action where the force created by the wipers in moving across the edge of the insole 152 at any given point is substantially radial to the curvature of the insole at that point.

During the forward stroke of the piston rod 98, a lug on the piston rod actuates a three way valve 162 which actuates the motor 50 to raise the hold-down foot 48 to the position indicated in FIGURE 9. The motor 60 now applies upward pressure by the last directly against the wipers to provide an overwiping pressure and bedding pressure between the wipers and the wiped-in margin of the upper during the latter part of the wiper stroke and also after the termination of the wiper stroke.

This concludes the lasting operation. The pincers 18, 20 are now opened to release the toe and forepar-t portions of the upper margin, the pincers are lowered to their initial positions on the upper tensioning unit 16, the clamping pad 38 is returned to its retracted position in the heel seat lasting unit 34, the motor 78 is actuated to return the heel seat lasting unit to its initial out-of-the-way position, the motors 28 are actuated to return the upper tensioning unit 16 to its original position, the motor 60 is actuated to lower the post and thereby lower the shoe on the last away from the wipers 40, 42, the motor 94 is actuated to retract the wipers, the motor 50 is actuated to lower the hold-down foot 48 to its initial position, and the motor 56 is actuated to swing the post 10 and the upper tensioning unit 16 carried thereby to its initial position.

It should be understood that the present disclosure is for the purpose of illustration only and that this invention includes all modifications that fall within the scope of the appended claim. Terms such as front, for- Wardly and bottom are merely indicative of the relative paths of movement and the relative positions of the parts and should be so construed.

I claim:

In an end lasting machine having a shoe support for supporting bottom-up a last having a shoe upper and insole mounted thereon: a pair of symmetrically disposed wipers having coplanar undersurfaces; a vertex located on the line of symmetry of the wipers; a rear side surface on each of the wipers extending rearwardly from the vertex, the rear side surfaces being in opposed relation; an intermediate side surface on each of the wipers, the intermediate side surfaces extending forwardly and divergently from the vertex; a front side surface on each of the wipers, the front side surfaces extending forwardly and divergently from the intermediate side surfaces to embrace the last; a recess in the undersurfaces of each of the wipers extending in an are from its rear side surface to its intermediate side surface whose center of curvature is at the vertex; a disc secured in the recess of one of the wipers and extending into the recess of the other of the wipers, the periphery of the disc being on a circle whose center of curvature is at said vertex and whose radius of curvature is substantially equal to the radii of curvature of the recesses, and the undersurface of the disc being substantially coplanar with the undersurfaces of the wipers; and means connected to the wipers to translate them forwardly and to swing the front side surfaces toward each other and the rear side surfaces away from each other about said vertex.

Eder Apr. 29, 1902 Schwabe May 8, 1962

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