US3918394A

US3918394A - Machine for cement lasting

Info

Publication number: US3918394A
Application number: US430291A
Authority: US
Inventors: Walter Vornberger
Original assignee: International Shoe Machine Corp
Current assignee: International Shoe Machine Corp
Priority date: 1973-08-06
Filing date: 1974-01-02
Publication date: 1975-11-11
Anticipated expiration: 1992-11-11

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.

Description

United States Patent 1191 Vornberger Nov. 11, 1975 MACHINE FOR CEMENT LASTING [75] Inventor: Walter Vornberger, Tewksbury,

Mass.

[73] Assignee: International Shoe Machine Corporation, Nashua, NH.

. [62] Division of Ser. No. 386.l29. Aug.,6, 1973. Pat. No.

52 us. c1 .L 118/7; 118/411 5-1 1111. Bosc 5/02 [58] Field of Search 118/410, 411, 315, 242, 118/7, 9. 412, 221

[56] References Cited UNITED STATES PATENTS 2.0l4.472 9/[935 French ll8/4ll X 3.3041563 2/1967 Fino l [ti/4H) X Primur Eraminer-John P. McIntosh Attorney, Agent, or FirmAlbert Gordon [57] 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 3 Claims, 23 Drawing Figures US. Patent Nov. 11, 1975 Sheet1of15 3,918,394

F/G. l

U.S. Patent Nov. 11, 1975 Sheet20f 15 3,918,394

U.S Patant Nov. 11, 1975 Sheet 3 of 15 3,918,394

U.S. Patent Nov. 11,1975 Sheet4of15 3,918,394

US. Patent Nov. 11, 1975 Sheet50f15 3,918,394

U.S. Patant Nov. 11,1975 Sheet60f 15 3,918,394

US. Patent N0v.1l, 1975 Sheet7of15 3,918,394

U.S. Patent Nov. 11, 1975 Sheet 9 of 15 3,918,394

vON

US. Patent Nov. 11,1975 Sheet 10 of 15 3,918,394

U.S. Patent Nov. 11, 1975 Sheet 13 of 15 3,918,394

US. Patent Nov. 11,1975 Sheet 14 of 15 3,918,394

38 m2 3? Illl m? T m m l @Qw HUWH l I I l l I mow U.S. Patent Nov.11, 1975 Sheet 15 of15 3,918,394

T m 4|s MACHINE FOR CEMENT LASTING This is a division of application Ser. No. 386,129, filed Aug. 6, 1973, now U.S. Pat. No. 3,831,216

BACKGROUND AND SUMMARY OF THE INVENTION This invention is directed to improvements over the cement lasting machine disclosed in U.S. Pat. applications Ser. No. 227,376, filed Feb. 18, 1972, now U.S. Pat. No. 3,775,797, and Ser. No. 325,701, filed Jan. 22, 1973, now Pat. No. 3,758,904.

The aforementioned machine inlcudes an arrangement for supporting bottom up a shoe assembly formed of a last having an upper mounted thereon and an insole located on its bottom with the opposite side portions of the upper margin extending upwardly of the insole. Lasting instrumentalities on each side of the support arrangement are caused to first engage the opposite side portions of the upper and then wipe the margins of these upper portions against the insole. The lasting instrumentalities are each mounted for inwardoutward movement on a base, and the bases are located on opposite sides of and outwardly of the support arrangement with each base also being mounted for inward-outward movement. Initially each base is located in an outer position with respect to the support arrangement, so that the shoe assembly can be readily placed on the support arrangement, and each lasting instrumentality is in an outer position with respect to its associated base. The bases are then moved inwardly, together with the lasting instrumentalities, to inner base positions wherein the lasting instrumentalities are close to but not in engagement with the sides of the shoe assembly. This is followed by a movement of the lasting instrumentalities inwardly of their outer positions on the bases so as to enable them to engage the opposite side portions of the upper and wipe the upper margin portions against the insole.

In the aformentioned machine, the lasting instrumentalities, when the bases have completed their inward movement, must always be disengaged from the shoe assembly and spaced a desired close distance from the shoe assembly. With the support arrangement of the aforementioned machine, each lasting instrumentality, when its associated base has completed its inward movement, will be a different distance from the shoe assembly or may actually engage the shoe assembly depending on whether the the shoe assembly is for a right foot or for a left foot due to the differences in the asymmetrical constructions of the left foot and the right foot shoe assemblies. In order to overcome this difficulty and to insure that the lasting instrumentalities are spaced the desired distance from the sides of the shoe assembly regardless of whether a left foot shoe assembly or a right foot shoe assembly is being operated on, the machine, in accordance with a first aspect of this invention, has been improved by providing a mechanism for selectively moving the part of the support arrangement that supports the toe portion of the shoe assembly laterally in one of two opposite lateral directions. I

In the aforementioned machine, the wiping of the opposite side portions of the upper margin against the insole is performed by lasting tools or straps that first apply relatively light back-up forces to the margin portions to fold them part way toward the insole. After this, cement nozzles are caused to travel along the sides of the insole periphery and outwardly thereof to the extent permitted by the margin portions, which are backed up by the lasting tools or straps, and to apply cement into the corner, between the margin portions and the insole periphery. This is followed by causing the lasting tools or straps to apply relatively heavy wiping forces to the margin portions to wipe the margin portions against the insole and attach them to the insole by way of the cement. The purpose of having the margin portions folded part way toward the insole during the travel ofthe nozzles and the extrusion of cement through the nozzles is to cause the folded margin portions to create a barrier between the upper margin and the insole that inhibits the creeping of cement between the margin and the insole and then between the upper and the sides of the last. Shoe assemblies are so constructed that one side of the shoe assembly has a'relatively pronounced reentrant portion and other side of the shoe assembly has a less pronounced reentrant portion. The side of the shoe assembly having the relatively pronounced reentrant portion is different for left foot shoe assemblies and right foot shoe assemblies. The angle formed between the side of the last and the bottom of the last on the side of the shoe assembly having the relatively pronounced reentrant portion is an acute angle which is smaller than the angle, which is close to a right angle, formed between the other side of the last and the bottom of the last. Therefore, the folding of the upper margin part way towards the insole on the side of the shoe assembly having the relatively pronounced reentrant portionis needed to create the barrier between the upper margin and the insole while this folding is not needed to create the barrier on the other side of the shoe assembly. Moreover the folding of the margin part way toward the insole on the side of the shoe assembly having the less pronounced reentrant portion tends to prevent the nozzle traveling along this side of the shoe assembly from reaching the periphery of the insole in the corner in which it is traveling which is undesirable for the subsequent cementatious attachment of the upper margin to the insole. In order to overcome this problem, in a second aspect of the invention only the lasting tool or strap on the side of the shoe assembly having the relatively pronounced reentrant portion is caused to apply the relatively light back-up force to fold the upper margin part way toward the insole.

The aforme'ntioned machine is intended to operate on a shoe assembly in which the upper margin of at least one end portion of the shoe has been wiped against the insole and to apply cement by a nozzle along a course of the upper margin that extends rearwardly of a boundary between an unwiped upper margin portion and the wiped end margin portion. The nozzle is connected to a yieldable drive means to effect forward-rearward movement of the nozzle and is caused to be located in a starting position in the corner between the unwiped margin portion and the corresponding portion of the insole periphery a particular distance rearward of the boundary. The drive means is then released to move the nozzle forwardly while the nozzle stays in the corner until the nozzle arrives at the boundary. Concomitantly with the arrival of the nozzle at the boundary, a reversing mechanism is actuated to cause the drive means to move the nozzle rearwardly while the nozzle stays in the corner and to cause cement to be extruded from the nozzle during its rearward movement. With this arrangement, the particular distance between the starting position and the boundary varies in accordance with the length of the shoe assembly and the forward-rearward location of the actuator for the reversing mechanism therefore has to be adjusted for each shoe assembly length.

In a third aspect of the invention, the inconvenience referred to at the end of the preceding paragraph is overcome by actuating the reversing mechanism a predetermined time after the drive means is released which time is equal to or greater then the minimum time it takes for the nozzle to move forwardly from the starting position to the boundary. Should the nozzle arrive at the boundary before the reversing mechanism is actuated, it will pause at the boundary, due to meeting resistance to forward movement at the boundary and due to its being driven forwardly by a yieldable drive means, until the reversing mechanism is actuated.

Each lasting instrumentality of the aforementioned machine is comprised ofa plurality of separated side by side heightwise extending straps. In the machine operation, the lasting straps are caused to so engage the shoe assembly that a top segment of each strap extends upwardly of the insole and outwardly of a portion of the upper margin. A nozzle is then caused to travel along the insole periphery while yieldable downward and outward forces are applied to the nozzle and cement is extruded through the nozzle to cause the nozzle to bear against the insole and the margin portion and to enable cement to be extruded into the corner between the margin portion and the insole. After this, the nozzle is moved inwardly of the margin and upwardly of the insole and the top segments of the lasting straps are folded downwardly and inwardly against the insole to wipe the margin portion against the insole and attach it to the insole by way of the cement.

Due to the separation between the lasting straps, the nozzle has a tendency to snag and get caught in the separation between the lasting straps and not move smoothly along the upper margin. In a fourth aspect of the invention, this difficulty is overcome be making that portion of the lasting straps that extend upwardly of the bottom of the insole when the lasting-straps engage the shoe assembly integral instead of separated.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an isometric view of the machine taken from the front of the machine;

FIG. 2 is an isometric view of the lasting instrumentalities of the machine;

FIG. 3 is an isometric view taken from a side of the machine, of a cement applying mechanism of the machine;

FIG. 4 is an exploded isometric view of the support arrangement of the machine;

FIG. 5 is an isometric view ofa portion of the support arrangement;

FIG. 6 is a view taken along the line 66 of FIG. 4;

FIG. 7 is a partially sectional view of a lasting instrumentality;

FIG. 8 is a plan view of the cement applying mechanism;

FIG. 9 is a plan view of a drive mechanism of the cement applying mechanism for effecting movement in forward-rearward directions of the cement nozzles;

FIG. 10 is a view taken along the line l0l0 of FIG.

FIG. 11 is a view taken along the line 1l-ll of FIG.

FIG. 12 is a side elevation, partially in section, taken along the line 1212 of FIG. 8;

FIG. 13 is a partially sectional view taken along the line 13-13 of FIG. 12;

FIG. 14 is a section taken along the line l414 of FIG. 13;

FIG. 15 is a section taken along the line 15-15 of FIG. 13;

FIG. 16 is a section taken along the line l6l6 of FIG. 12;

FIG. 17 is a view taken along the line l717 of FIG.

FIG. 18 is a partially sectional view taken along the line 18-18 of FIG. 1;

FIGS. 19 and 19A are schematic representations of portions of the pneumatic control circuit of the machine;

FIG. 20 is a representation of the shoe assembly as it is supported in the machine at the beginning of a machine cycle;

FIG. 20A is a view taken along the line 20A20A of FIG. 20; and

FIG. 21 is a veiw showing the nozzles as they appear when applying cement into the corners between the side portions of the upper margin and the corresponding portions of the insole periphery.

DESCRIPTION OF THE PREFERRED EMBODIMENT The operator is intended to stand in front of the machine as seen FIG. 1 and to the left of the machine as seen in FIG. 3. Directions extending toward the operator (right to left in FIG. 3) will be designated as forward and directions extending away from the operator (left to right in FIG. 3) will be designated as rearward. The front of the machine is closest to the operator and the back of the machine is furthermost from the operator.

Referring to the FIGS. 1 and 4, the machine includes a sleeve 10 that is fixedly mounted to a stationary bracket 12. A bar 14 is movably mounted in the sleeve 10 for heightwise movement. An air operated motor 16, that is secured to the bracket 12, has an upwardly extending piston rod 18 that is secured to the bottom of the bar 14, whereby the motor 16 can effect heightwise movement of the bar 14. A last pin 20 is mounted to the top of the bar 14.

Referring to FIGS. 1 and 4-6, a bracket 22, secured to the front of the bar 14, has a plate 24 that is received in a clevis formed at the back of a mount 26. A pin 28 pivotally mounts the mount 26 to the plate 24 for lateral swinging movement about the heightwise extending axis of the pin 28. A column 30 is secured to an extends upwardly of the mount 26 and a toe rest 32 is mounted to the top of the column 30. The mount 26, the column 30 and the toe rest 32 form a toe rest assembly. The toe rest 32 is located in front of the last pin 20. A pair of wings 34 are secured to the sides of the plate 24 and extend forwardly thereof on opposite sides of the mount 26. A cam 36 is threaded onto a screw 38 that is rotatably mounted in the mount 26 so that the forward-rearward position of the cam 36 in the mount 26 can be adjusted by rotating a knob 39 that is secured to the front of the screw 38. The sides of the cam 36 are adapted to engage the wings 34 to limit the extent of swinging movement of the mount 26, together with toe rest 32, about the axis of the pin 28. An air actuated motor is mounted to each wing 34 and each motor 40 has a piston rod 42 that extends toward the mount 26.

The last pin 20 and the toe rest 32 consitute a shoe support 43. H

Referring to FIGS. 1 and 3, a platform 44, located rearwardly of the last pin 20, has a gib 46 secured thereto that slidably receives a slide 48 for forwardrearward movement. A mount 50is secured to the slide 48 and a downwardly extending hold-down 52 is secured to the front of the mount 50. An air actuated motor 54, mounted to platform 44, has a piston rod 55 that is secured to the slide 48 whereby the motor 54 canueffect forward-rearward movement of the holddown 52.

Duplicate sets oflasting units'56 are located on opposite side of the shoe support 43, the left set of lasting units 56 in FIG. 1 being drawn in and only the outline of the right set of-lasting units 56 being shown in FIG. 1.

Referring to FIGS. land 2, each set of lasting units 56 is mounted for inward-outward movement on a table 58. An air actuated motor 60, mounted to each table 58, has a piston rod 62 that is secured to a base 64 of a. set of lasting units 56 to thereby enable the motors to effect inward-outward movement of the sets of lastingunits 56. A bolt 66 is mounted to each base 64 so as to be in registry with a flange 68 mounted to each table 58 and in registry with a valve 70 mounted in each flange 68.

Referring to FIGS. 2 and 7, each set of lasting units 56 is formed of a plurality of lasting units 72 located side by side that are mounted to a support 74 that is secured to and is located above a base 64. A flange 76 for each lasting unit 72 is secured to and extends upwardly o fa support 74 and threadedly receives a bolt 78. Each bolt 78 extends through an outer slide bracket 80, forming a part of a lasting unit 72, that is slidably mounted to a support 74 for inward-outward movement. Each lasting unit 72 includes an inner slide bracket 82 that is mounted to a support 74 for inwardoutward movement. A knob 84 is pinned to'theouter end 86 of each bolt 78, the outer ends 86 being of smaller diameter than the threaded portions of the bolts 78. The brackets are located between the shoulders located at the juncture of the larger and smallerdiamtered portions of the bolts 78 and shoulders formed at the inner ends of the knobs 84. Due to the connection between the outer brackets 80 and the inner brackets 82, described below, rotation of the knobs 84 in one direction or the other will cause inward or outward movement of the

brackets

80, 82 along the supports 74 and thus cause inward or outward movement of the lasting units 72.

An'a'ir operated motor 88 is pivoted to. each outer bracket 80 and extends inwardly thereof. The piston rod 90 of each motor 88' is pivoted by a pin 92 to the middle of a lever 94. Each lever 94 has an upper limb 96 and a lower limb 98, the limbs extending inwardly of the pin 92. Each limb 98 is pivoted by a pin 100 to a lever 102. The bottom of each lever 102 is pivoted by a pin 104 to a block 106 for inward-outward movement about the axis of the pin 104. Each block l06 is pivoted for heightwise movement to an inner slide bracket 82 by a pin 108. A shaft 110, mounted to an upstanding from each bracket 82 inwardly of its associated pin 108, extends through its associated block 106..Com-

'pression springs 112 are entwined about the shafts and extend between thetops ofthe blocks 106 and collars 114 mounted to the tops of the shafts 110. The springs 112 yieldably urge the blocks 106 downwardly about the axes of the pins 108 to positions wherein the bottoms of the blocks 106 engage collars 116 that are mounted to the shafts 110 beneath the blocks 106.

A lasting instrumentality 118 is anchored to each block 106 by bolts 120. Each lasting instrumentality 118 is formed of three. plies, the outer ply being an outer presser strap 122, the middle ply being an inner presser strap 124, and theinner ply being a lasting strap 126. The

straps

122, 124 and 126 are made of an elastic, flexible'and deformable material such as urethane. The

straps

122, 124 and 126 respectively have

bottom segments

122a, 124a and 126a that are rigid by virtue of being secured to the block 106 by the bolts 120. The top of each lasting strap 126 is formed into a thickened relatively rigid top segment l26b. The meddle segment 126a of the lasting strap 126, between the bottom segment126a and the top segment 126b, is flexible, deformable'and stretchable. I

The top of each inner presser strap 124 is formedinto a thickened relatively rigid top segment 124b that is lo- I cated below its associated lasting strap top segment 126b.'The middle segment 124c of the inner presser strap 124, between the bottom segment 124a andthe top segment 124b, is flexiable, deformable and stretchable. 1

The top of each outer presser strap 122 is formed into a thickened relatively rigid top segment 122b that is located below its associated inner presser strap top segment l24b. The middle segment l22c of the outer presser strap 122, between the bottom segment 122a and the top segment 122b, is flexible, deformable and stretchable.

A lug 128, embedded in the outer presser strap top segment 122b, has a pin 130 mounted thereto that is slidably received in a slot 132 formed at the top of each lever 102.

A Iug 134, embedded in the inner presser strap top segment 124b, is pivoted by a pin 136 to a link 138, and each link 138 is pivoted by a pin 140 to the top of its associated limb 96. I

An air operated motor 142 is associated with each lasting instrumentality 118. Each motor 142 is pivoted to a bracket 144 that is secured to the top of each outer bracket 80. The motors 142 extend inwardly of the brackets 144. A socket 146 is embedded in each lasting strap top segment 1261). Each socket 146 rotatably receives a ball 148 that is mounted to the inner end of the piston rod 150 of its associated motor 142 to thereby provide a flexible connection between the piston rods I 150 and the lasting strap top segments ,126b.

As can be seen in FIG. 2, the lasting straps 126 in each of the sets of lasting units 56 are separated from each other from their bottoms up to points 152 that are approximately level with the bottoms of the top segments l24b of the inner presser straps 124 and are integral above the points 152 in the region 153.

Referring to FIGS. 3 and 8, a pair of front posts 154 and a pair of back posts 156 are upstanding from the platform 44. The

posts

154 and 156 are located on opposite sides of the platform 44 and a pair of slide rods 158 are secured to and extend between each set of

posts

154 and 156 so as to be located on opposite sides of the platform 44 and so as to extend in forwardrearward directions. A bearing 160 is slidably mounted on each slide rod 158 for forward-rearward movement and a slide plate 162 extends between the bearings 160 and is secured to bearing blocks 164 that are mounted to each of the bearings 160.

An air operated motor 166 is pivoted to a post 168 that extends upwardly of the back of the platform 44. The motor 166 extends forwardly of the post 168 and has a forwardly extending piston rod 170 that is pivoted by a pin 172 (FIG. 9) to a link 174 between the ends of this link. One end of the link 174 is pivoted by a pin 176 to the front of a link 178, the back of the link 178 being pivoted to a post 180 that extends upwardly of the platform 44 forwardly of the post 168. The link 174 extends rearwardly of the pin 176 and laterally towards a side of the platform 44, and the end of the link 174 remote from the pin 176 is pivoted to a post 182 that extends upwardly of the link 174 and is secured to a bearing block 164.

Referring to FIGS. 9 and 11, a projection 184 extends inwardly of the bottom of a post 186 that depends from a bearing block 164. A value 188, mounted to the projection 184, has a forwardly directed valve stem 190 that is spring urged forwardly by the conventional spring in the valve 188 so as to urge the valve stem 190 against a valve actuating rod 192 that is pivoted to the projection 184 for forward-rearward swinging movement about the axis of a pin 194. The valve stem 190 urges the rod 192 forwardly about the axis of the pin 194 to a position wherein the front of the rod 192 engages a stop pin 196 that is upstanding from the projection 184.

Referring to FIG. 11, a column 198 is mounted in the machine adjacent the front posts 154 for forwardrearward adjustment by means that are not shown. A support 200 extends rearwardly of this column. An air actuated motor 202 is pivoted to a clevis 204 mounted to the support 200 and the piston rod 206 of the motor 202 extends rearwardly of this motor. The top of a bar 208 is pivoted to a clevis 210 that is secured to the back of the piston rod 206. The bottom of the bar-208 is so pivoted to the back of the support 200 that a stop lug 212 extends below the support 200 in alignment with the outer end of the rod 192 that is remote from the pin 194.

Referring to FIG. 12, a cement pot 214 is mounted to the slide plate 162 for forward-rearward movement therewith. The cement pot includes a funnel 216 into which solid granules of thermoplastic cement is supplied and a storage chamber 218 into which the solid cement gravitates from the funnel 216 and in which the cement is melted by heating means (not shown). The molten cement gravitates from the chamber 218 through a passage 220 and an orifice 222 in a hollow sleeve 224 into a bore 226 forming the hollow interior of the sleeve 224. The sleeve 224 is mounted to the cement pot 214. An air operated motor 228, also mounted to the cement pot 214, has a downwardly depending piston rod 230 to which is attached a downwardly depending plunger 232 that is slidable in the bore 226. An orifice 234 in the bottom of the sleeve 224 has a valve seat 236 formed thereon that is cooperative with a ball valve 238 to close the orifice 234 in response to upward movement of the plunger 232 in the manner described below. The ball valve normally rests on a support member 240 that is mounted to the cement pot 214 so that communication is provided between the orifice 234 and a passage 242 located below the orifice 234.

Referring to FIGS. 12 and 13, a prong 244 is secured to and extends downwardly and forwardly of the cement pot 214. A block 246 is pivoted to a post 248 extending upwardly of the front of the prong 244 for swinging movement about the upright axis of the post 248. A projection 250 (FIG. 8) extends laterally of each side of the block 246 and a stabilizer bolt 252 is secured to each projection 250 with a head 254 of each bolt 252 extending rearwardly of its associated projection 250. As shown particularly in FIGS. 8 and 10, a pair of single acting spring return airoperated motors 256 are so mounted to the slide plate 162 that their forwardly directed piston rods 258 are in alignment with the bolt heads 254.

A pair of aligned spindles 260 (FIG. 13) are mounted for swinging movement about a horizontal axis in projections 262 of the block 246, the spindles having extensions 264 that extend outwardly of the block 246. A heightwise extending spindle 266 (see FIGS. 13 and 14) is rotatably mounted in each spindle extension 264 and a nozzle carrier 268 is mounted to an extension 270 of the spindle 266 so as to extend forwardly thereof. A nozzle holder 272 is mounted to the front of each nozzle carrier 268 and a nozzle 274 (FIG. 15) is mounted to and depends downwardly of each nozzle holder 272. Interconnected passage means 276 in the cement pot 214, the prong 244, the block 246, the post 248, the spindles 260, the spindle extensions 264, the spindles 266, the nozzle carriers 268, the nozzle holders 272 and the nozzles 274 provide communication for the molten cement between the passage 242 and passages 278 (FIG. 15) located in each of the nozzles 274. Strategically located electric cartridge heaters, such as the heaters 280 shown in FIGS. 14 and 15, serve to maintain the cement that is in the passage means 276 and the passages 278 molten. A check valve 282 (FIG. 15) in each nozzle holder 272 yieldably blocks the flow of cement through the passage means 276.

Each spindle extension 270 has a bar 284 (FIGS. 12-14) extending rearwardly thereof that has a bar 286 depending from its back end. Each bar 286 is mounted to a yoke 288. One of the'yokes 288 is secured to the cylinder 290 (FIG. 16) of an air operated motor 292 and the other yoke 288 is secured to the piston rod 294 of this motor. As described below, the operation of the motor 292 serves to swing the nozzle carriers 268 and the bars 284 about the axes of the spindles 266. The extent of outward movement of the bars 284 and the extent of inward movement of the nozzle carriers 268 is determined by the engagement of the bars 284 with stop bolts 296 that are located outwardly of the bars 284 and are mounted to bars 298 that in turn are secured to their associated block extensions 264.

A rod 300 (FIG. 10) attached to an extending rearwardly of each projection 250 of the block 246 has a post 302 depending from its back, and an air operated motor 304 is pivoted to the bottom of each post 302. A lug 306, depending downwardly of and connected to each spindle extension 264, is pivoted to a clevis 308 that is secured to the piston rod 310 of its associated motor 304, the piston rods 310 projecting forwardly of the motors 304.

Claims

1. A cement applying mechanism comprising: support means for supporting bottom - up a shoe assembly that includes a last having an insole located on its bottom and an upper mounted thereon, at least one end portion of the margin of the upper having been wiped against the insole and an unwiped portion of the upper margin extending rearwardly of said wiped end portion and extending upwardly of the corresponding portion of the insole periphery; a nozzle, located above the shoe assembly, mounted for forward - rearward movement; yieldable drive means connected to the nozzle and actuable to effect said forward - rearward movement; cement extruding means actuable to extrude cement through the nozzle; means for initially locating the nozzle with the cement extruding means in unactuated condition in a starting position in the corner between said unwiped margin portion and the corresponding portion or the insole periphery a particular distance rearwardly of the boundary between said wiped and unwiped margin portions release means actuable to thereafter enable the yieldable drive means to move the nozzle forwardly while the nozzle stays in said corner with the cement extruding means remaining in unactuated condition until the nozzle forward movement is arrested due to the arrival of the nozzle at said boundary; reversing means actuable to cause the drive means to thereafter move the nozzle rearwardly while the nozzle stays in said corner until the nozzle arrives at a desired location along said unwiped margin portion; means for actuating said reversing means a predetermined time after the actuation of said release means which time is not less than the time required for the nozzle to move through said particular distance; and means for actuating the cement extruding means during substantially the entire rearward movement of the nozzle to cause cement to be extruded through the nozzle into said corner during substantially the entire rearward movement of the nozzle.

2. The mechanism of claim 1 wherein the means for actuating said rversing means comprises: time delay means actuable concomitantly with the actuation of said release means, said time delay means being effective a predetermined time after its actuation to actuate the reversing means.

3. The mechanism of claim 2 further comprising: means for causing the drive means to initially retain the nozzle in an initial location that is rearward of the said starting position; an actuating member connected to the nozzle for forward movement therewith; a stop member located forwardly of the actuating member when the nozzle is in said initial location; means mounting the stop member for movement between a first position wherein it is in registry with the actuating member and a second position wherein it is out of registry with the actuating member; means for initially retaining the stop member in said first position; means for initially retaining the nozzle in an upper and inner position wherein the nozzle is spaced above the insole and is inward of the insole periphery; and means for thereafter causing the drive means to move the nozzle forwardly until the actuating member engages the stop member; wherein said means for initially locating said nozzle in said starting position comprises: nozzle shifting means responsive to the engagement of the actuating member with the stop member to move the nozzle downwardly and outwardly into said corner in said starting position; wherein said release means comprises: means, operative after the actuation of said nozzle shifting means, to effect a movement of the stop member to said second position; and wherein said time delay means comprises: circuit means energizable concomitantly with the movement of the stop member to said second position actuable to operate the reversing means and a time delay mechanism in said circuit means effective to delay the operation of the reversing means a predetermined time after the energization of the circuit means.